http-push.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "pack.h"
   4 #include "fetch.h"
   5 #include "tag.h"
   6 #include "blob.h"
   7 #include "http.h"
   8 #include "refs.h"
   9 #include "diff.h"
  10 #include "revision.h"
  11 #include "exec_cmd.h"
  12
  13 #include <expat.h>
  14
  15 static const char http_push_usage[] =
  16 "git-http-push [--all] [--force] [--verbose] <remote> [<head>...]\n";
  17
  18 #ifndef XML_STATUS_OK
  19 enum XML_Status {
  20   XML_STATUS_OK = 1,
  21   XML_STATUS_ERROR = 0
  22 };
  23 #define XML_STATUS_OK    1
  24 #define XML_STATUS_ERROR 0
  25 #endif
  26
  27 #define PREV_BUF_SIZE 4096
  28 #define RANGE_HEADER_SIZE 30
  29
  30 /* DAV methods */
  31 #define DAV_LOCK "LOCK"
  32 #define DAV_MKCOL "MKCOL"
  33 #define DAV_MOVE "MOVE"
  34 #define DAV_PROPFIND "PROPFIND"
  35 #define DAV_PUT "PUT"
  36 #define DAV_UNLOCK "UNLOCK"
  37 #define DAV_DELETE "DELETE"
  38
  39 /* DAV lock flags */
  40 #define DAV_PROP_LOCKWR (1u << 0)
  41 #define DAV_PROP_LOCKEX (1u << 1)
  42 #define DAV_LOCK_OK (1u << 2)
  43
  44 /* DAV XML properties */
  45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
  46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
  47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
  48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
  49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
  50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
  51 #define DAV_PROPFIND_RESP ".multistatus.response"
  52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
  53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
  54
  55 /* DAV request body templates */
  56 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
  57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
  58 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
  59
  60 #define LOCK_TIME 600
  61 #define LOCK_REFRESH 30
  62
  63 /* bits #0-15 in revision.h */
  64
  65 #define LOCAL    (1u<<16)
  66 #define REMOTE   (1u<<17)
  67 #define FETCHING (1u<<18)
  68 #define PUSHING  (1u<<19)
  69
  70 /* We allow "recursive" symbolic refs. Only within reason, though */
  71 #define MAXDEPTH 5
  72
  73 static int pushing = 0;
  74 static int aborted = 0;
  75 static signed char remote_dir_exists[256];
  76
  77 static struct curl_slist *no_pragma_header;
  78 static struct curl_slist *default_headers;
  79
  80 static int push_verbosely = 0;
  81 static int push_all = 0;
  82 static int force_all = 0;
  83
  84 static struct object_list *objects = NULL;
  85
  86 struct repo
  87 {
  88         char *url;
  89         int path_len;
  90         int has_info_refs;
  91         int can_update_info_refs;
  92         int has_info_packs;
  93         struct packed_git *packs;
  94         struct remote_lock *locks;
  95 };
  96
  97 static struct repo *remote = NULL;
  98
  99 enum transfer_state {
 100         NEED_FETCH,
 101         RUN_FETCH_LOOSE,
 102         RUN_FETCH_PACKED,
 103         NEED_PUSH,
 104         RUN_MKCOL,
 105         RUN_PUT,
 106         RUN_MOVE,
 107         ABORTED,
 108         COMPLETE,
 109 };
 110
 111 struct transfer_request
 112 {
 113         struct object *obj;
 114         char *url;
 115         char *dest;
 116         struct remote_lock *lock;
 117         struct curl_slist *headers;
 118         struct buffer buffer;
 119         char filename[PATH_MAX];
 120         char tmpfile[PATH_MAX];
 121         int local_fileno;
 122         FILE *local_stream;
 123         enum transfer_state state;
 124         CURLcode curl_result;
 125         char errorstr[CURL_ERROR_SIZE];
 126         long http_code;
 127         unsigned char real_sha1[20];
 128         SHA_CTX c;
 129         z_stream stream;
 130         int zret;
 131         int rename;
 132         void *userData;
 133         struct active_request_slot *slot;
 134         struct transfer_request *next;
 135 };
 136
 137 static struct transfer_request *request_queue_head = NULL;
 138
 139 struct xml_ctx
 140 {
 141         char *name;
 142         int len;
 143         char *cdata;
 144         void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
 145         void *userData;
 146 };
 147
 148 struct remote_lock
 149 {
 150         char *url;
 151         char *owner;
 152         char *token;
 153         time_t start_time;
 154         long timeout;
 155         int refreshing;
 156         struct remote_lock *next;
 157 };
 158
 159 /* Flags that control remote_ls processing */
 160 #define PROCESS_FILES (1u << 0)
 161 #define PROCESS_DIRS  (1u << 1)
 162 #define RECURSIVE     (1u << 2)
 163
 164 /* Flags that remote_ls passes to callback functions */
 165 #define IS_DIR (1u << 0)
 166
 167 struct remote_ls_ctx
 168 {
 169         char *path;
 170         void (*userFunc)(struct remote_ls_ctx *ls);
 171         void *userData;
 172         int flags;
 173         char *dentry_name;
 174         int dentry_flags;
 175         struct remote_ls_ctx *parent;
 176 };
 177
 178 static void finish_request(struct transfer_request *request);
 179 static void release_request(struct transfer_request *request);
 180
 181 static void process_response(void *callback_data)
 182 {
 183         struct transfer_request *request =
 184                 (struct transfer_request *)callback_data;
 185
 186         finish_request(request);
 187 }
 188
 189 #ifdef USE_CURL_MULTI
 190 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
 191                                void *data)
 192 {
 193         unsigned char expn[4096];
 194         size_t size = eltsize * nmemb;
 195         int posn = 0;
 196         struct transfer_request *request = (struct transfer_request *)data;
 197         do {
 198                 ssize_t retval = write(request->local_fileno,
 199                                        ptr + posn, size - posn);
 200                 if (retval < 0)
 201                         return posn;
 202                 posn += retval;
 203         } while (posn < size);
 204
 205         request->stream.avail_in = size;
 206         request->stream.next_in = ptr;
 207         do {
 208                 request->stream.next_out = expn;
 209                 request->stream.avail_out = sizeof(expn);
 210                 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
 211                 SHA1_Update(&request->c, expn,
 212                             sizeof(expn) - request->stream.avail_out);
 213         } while (request->stream.avail_in && request->zret == Z_OK);
 214         data_received++;
 215         return size;
 216 }
 217
 218 static void start_fetch_loose(struct transfer_request *request)
 219 {
 220         char *hex = sha1_to_hex(request->obj->sha1);
 221         char *filename;
 222         char prevfile[PATH_MAX];
 223         char *url;
 224         char *posn;
 225         int prevlocal;
 226         unsigned char prev_buf[PREV_BUF_SIZE];
 227         ssize_t prev_read = 0;
 228         long prev_posn = 0;
 229         char range[RANGE_HEADER_SIZE];
 230         struct curl_slist *range_header = NULL;
 231         struct active_request_slot *slot;
 232
 233         filename = sha1_file_name(request->obj->sha1);
 234         snprintf(request->filename, sizeof(request->filename), "%s", filename);
 235         snprintf(request->tmpfile, sizeof(request->tmpfile),
 236                  "%s.temp", filename);
 237
 238         snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
 239         unlink(prevfile);
 240         rename(request->tmpfile, prevfile);
 241         unlink(request->tmpfile);
 242
 243         if (request->local_fileno != -1)
 244                 error("fd leakage in start: %d", request->local_fileno);
 245         request->local_fileno = open(request->tmpfile,
 246                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
 247         /* This could have failed due to the "lazy directory creation";
 248          * try to mkdir the last path component.
 249          */
 250         if (request->local_fileno < 0 && errno == ENOENT) {
 251                 char *dir = strrchr(request->tmpfile, '/');
 252                 if (dir) {
 253                         *dir = 0;
 254                         mkdir(request->tmpfile, 0777);
 255                         *dir = '/';
 256                 }
 257                 request->local_fileno = open(request->tmpfile,
 258                                              O_WRONLY | O_CREAT | O_EXCL, 0666);
 259         }
 260
 261         if (request->local_fileno < 0) {
 262                 request->state = ABORTED;
 263                 error("Couldn't create temporary file %s for %s: %s",
 264                       request->tmpfile, request->filename, strerror(errno));
 265                 return;
 266         }
 267
 268         memset(&request->stream, 0, sizeof(request->stream));
 269
 270         inflateInit(&request->stream);
 271
 272         SHA1_Init(&request->c);
 273
 274         url = xmalloc(strlen(remote->url) + 50);
 275         request->url = xmalloc(strlen(remote->url) + 50);
 276         strcpy(url, remote->url);
 277         posn = url + strlen(remote->url);
 278         strcpy(posn, "objects/");
 279         posn += 8;
 280         memcpy(posn, hex, 2);
 281         posn += 2;
 282         *(posn++) = '/';
 283         strcpy(posn, hex + 2);
 284         strcpy(request->url, url);
 285
 286         /* If a previous temp file is present, process what was already
 287            fetched. */
 288         prevlocal = open(prevfile, O_RDONLY);
 289         if (prevlocal != -1) {
 290                 do {
 291                         prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
 292                         if (prev_read>0) {
 293                                 if (fwrite_sha1_file(prev_buf,
 294                                                      1,
 295                                                      prev_read,
 296                                                      request) == prev_read) {
 297                                         prev_posn += prev_read;
 298                                 } else {
 299                                         prev_read = -1;
 300                                 }
 301                         }
 302                 } while (prev_read > 0);
 303                 close(prevlocal);
 304         }
 305         unlink(prevfile);
 306
 307         /* Reset inflate/SHA1 if there was an error reading the previous temp
 308            file; also rewind to the beginning of the local file. */
 309         if (prev_read == -1) {
 310                 memset(&request->stream, 0, sizeof(request->stream));
 311                 inflateInit(&request->stream);
 312                 SHA1_Init(&request->c);
 313                 if (prev_posn>0) {
 314                         prev_posn = 0;
 315                         lseek(request->local_fileno, SEEK_SET, 0);
 316                         ftruncate(request->local_fileno, 0);
 317                 }
 318         }
 319
 320         slot = get_active_slot();
 321         slot->callback_func = process_response;
 322         slot->callback_data = request;
 323         request->slot = slot;
 324
 325         curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
 326         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
 327         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 328         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 329         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 330
 331         /* If we have successfully processed data from a previous fetch
 332            attempt, only fetch the data we don't already have. */
 333         if (prev_posn>0) {
 334                 if (push_verbosely)
 335                         fprintf(stderr,
 336                                 "Resuming fetch of object %s at byte %ld\n",
 337                                 hex, prev_posn);
 338                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 339                 range_header = curl_slist_append(range_header, range);
 340                 curl_easy_setopt(slot->curl,
 341                                  CURLOPT_HTTPHEADER, range_header);
 342         }
 343
 344         /* Try to get the request started, abort the request on error */
 345         request->state = RUN_FETCH_LOOSE;
 346         if (!start_active_slot(slot)) {
 347                 fprintf(stderr, "Unable to start GET request\n");
 348                 remote->can_update_info_refs = 0;
 349                 release_request(request);
 350         }
 351 }
 352
 353 static void start_mkcol(struct transfer_request *request)
 354 {
 355         char *hex = sha1_to_hex(request->obj->sha1);
 356         struct active_request_slot *slot;
 357         char *posn;
 358
 359         request->url = xmalloc(strlen(remote->url) + 13);
 360         strcpy(request->url, remote->url);
 361         posn = request->url + strlen(remote->url);
 362         strcpy(posn, "objects/");
 363         posn += 8;
 364         memcpy(posn, hex, 2);
 365         posn += 2;
 366         strcpy(posn, "/");
 367
 368         slot = get_active_slot();
 369         slot->callback_func = process_response;
 370         slot->callback_data = request;
 371         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
 372         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 373         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 374         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
 375         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 376
 377         if (start_active_slot(slot)) {
 378                 request->slot = slot;
 379                 request->state = RUN_MKCOL;
 380         } else {
 381                 request->state = ABORTED;
 382                 free(request->url);
 383                 request->url = NULL;
 384         }
 385 }
 386 #endif
 387
 388 static void start_fetch_packed(struct transfer_request *request)
 389 {
 390         char *url;
 391         struct packed_git *target;
 392         FILE *packfile;
 393         char *filename;
 394         long prev_posn = 0;
 395         char range[RANGE_HEADER_SIZE];
 396         struct curl_slist *range_header = NULL;
 397
 398         struct transfer_request *check_request = request_queue_head;
 399         struct active_request_slot *slot;
 400
 401         target = find_sha1_pack(request->obj->sha1, remote->packs);
 402         if (!target) {
 403                 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
 404                 remote->can_update_info_refs = 0;
 405                 release_request(request);
 406                 return;
 407         }
 408
 409         fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
 410         fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
 411
 412         filename = sha1_pack_name(target->sha1);
 413         snprintf(request->filename, sizeof(request->filename), "%s", filename);
 414         snprintf(request->tmpfile, sizeof(request->tmpfile),
 415                  "%s.temp", filename);
 416
 417         url = xmalloc(strlen(remote->url) + 64);
 418         sprintf(url, "%sobjects/pack/pack-%s.pack",
 419                 remote->url, sha1_to_hex(target->sha1));
 420
 421         /* Make sure there isn't another open request for this pack */
 422         while (check_request) {
 423                 if (check_request->state == RUN_FETCH_PACKED &&
 424                     !strcmp(check_request->url, url)) {
 425                         free(url);
 426                         release_request(request);
 427                         return;
 428                 }
 429                 check_request = check_request->next;
 430         }
 431
 432         packfile = fopen(request->tmpfile, "a");
 433         if (!packfile) {
 434                 fprintf(stderr, "Unable to open local file %s for pack",
 435                         filename);
 436                 remote->can_update_info_refs = 0;
 437                 free(url);
 438                 return;
 439         }
 440
 441         slot = get_active_slot();
 442         slot->callback_func = process_response;
 443         slot->callback_data = request;
 444         request->slot = slot;
 445         request->local_stream = packfile;
 446         request->userData = target;
 447
 448         request->url = url;
 449         curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
 450         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
 451         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 452         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 453         slot->local = packfile;
 454
 455         /* If there is data present from a previous transfer attempt,
 456            resume where it left off */
 457         prev_posn = ftell(packfile);
 458         if (prev_posn>0) {
 459                 if (push_verbosely)
 460                         fprintf(stderr,
 461                                 "Resuming fetch of pack %s at byte %ld\n",
 462                                 sha1_to_hex(target->sha1), prev_posn);
 463                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 464                 range_header = curl_slist_append(range_header, range);
 465                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
 466         }
 467
 468         /* Try to get the request started, abort the request on error */
 469         request->state = RUN_FETCH_PACKED;
 470         if (!start_active_slot(slot)) {
 471                 fprintf(stderr, "Unable to start GET request\n");
 472                 remote->can_update_info_refs = 0;
 473                 release_request(request);
 474         }
 475 }
 476
 477 static void start_put(struct transfer_request *request)
 478 {
 479         char *hex = sha1_to_hex(request->obj->sha1);
 480         struct active_request_slot *slot;
 481         char *posn;
 482         char type[20];
 483         char hdr[50];
 484         void *unpacked;
 485         unsigned long len;
 486         int hdrlen;
 487         ssize_t size;
 488         z_stream stream;
 489
 490         unpacked = read_sha1_file(request->obj->sha1, type, &len);
 491         hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
 492
 493         /* Set it up */
 494         memset(&stream, 0, sizeof(stream));
 495         deflateInit(&stream, Z_BEST_COMPRESSION);
 496         size = deflateBound(&stream, len + hdrlen);
 497         request->buffer.buffer = xmalloc(size);
 498
 499         /* Compress it */
 500         stream.next_out = request->buffer.buffer;
 501         stream.avail_out = size;
 502
 503         /* First header.. */
 504         stream.next_in = (void *)hdr;
 505         stream.avail_in = hdrlen;
 506         while (deflate(&stream, 0) == Z_OK)
 507                 /* nothing */;
 508
 509         /* Then the data itself.. */
 510         stream.next_in = unpacked;
 511         stream.avail_in = len;
 512         while (deflate(&stream, Z_FINISH) == Z_OK)
 513                 /* nothing */;
 514         deflateEnd(&stream);
 515         free(unpacked);
 516
 517         request->buffer.size = stream.total_out;
 518         request->buffer.posn = 0;
 519
 520         request->url = xmalloc(strlen(remote->url) +
 521                                strlen(request->lock->token) + 51);
 522         strcpy(request->url, remote->url);
 523         posn = request->url + strlen(remote->url);
 524         strcpy(posn, "objects/");
 525         posn += 8;
 526         memcpy(posn, hex, 2);
 527         posn += 2;
 528         *(posn++) = '/';
 529         strcpy(posn, hex + 2);
 530         request->dest = xmalloc(strlen(request->url) + 14);
 531         sprintf(request->dest, "Destination: %s", request->url);
 532         posn += 38;
 533         *(posn++) = '.';
 534         strcpy(posn, request->lock->token);
 535
 536         slot = get_active_slot();
 537         slot->callback_func = process_response;
 538         slot->callback_data = request;
 539         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
 540         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
 541         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
 542         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 543         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
 544         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
 545         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
 546         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 547         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 548
 549         if (start_active_slot(slot)) {
 550                 request->slot = slot;
 551                 request->state = RUN_PUT;
 552         } else {
 553                 request->state = ABORTED;
 554                 free(request->url);
 555                 request->url = NULL;
 556         }
 557 }
 558
 559 static void start_move(struct transfer_request *request)
 560 {
 561         struct active_request_slot *slot;
 562         struct curl_slist *dav_headers = NULL;
 563
 564         slot = get_active_slot();
 565         slot->callback_func = process_response;
 566         slot->callback_data = request;
 567         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
 568         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
 569         dav_headers = curl_slist_append(dav_headers, request->dest);
 570         dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
 571         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 572         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 573         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 574
 575         if (start_active_slot(slot)) {
 576                 request->slot = slot;
 577                 request->state = RUN_MOVE;
 578         } else {
 579                 request->state = ABORTED;
 580                 free(request->url);
 581                 request->url = NULL;
 582         }
 583 }
 584
 585 static int refresh_lock(struct remote_lock *lock)
 586 {
 587         struct active_request_slot *slot;
 588         struct slot_results results;
 589         char *if_header;
 590         char timeout_header[25];
 591         struct curl_slist *dav_headers = NULL;
 592         int rc = 0;
 593
 594         lock->refreshing = 1;
 595
 596         if_header = xmalloc(strlen(lock->token) + 25);
 597         sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
 598         sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
 599         dav_headers = curl_slist_append(dav_headers, if_header);
 600         dav_headers = curl_slist_append(dav_headers, timeout_header);
 601
 602         slot = get_active_slot();
 603         slot->results = &results;
 604         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 605         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 606         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
 607         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
 608         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 609
 610         if (start_active_slot(slot)) {
 611                 run_active_slot(slot);
 612                 if (results.curl_result != CURLE_OK) {
 613                         fprintf(stderr, "LOCK HTTP error %ld\n",
 614                                 results.http_code);
 615                 } else {
 616                         lock->start_time = time(NULL);
 617                         rc = 1;
 618                 }
 619         }
 620
 621         lock->refreshing = 0;
 622         curl_slist_free_all(dav_headers);
 623         free(if_header);
 624
 625         return rc;
 626 }
 627
 628 static void check_locks(void)
 629 {
 630         struct remote_lock *lock = remote->locks;
 631         time_t current_time = time(NULL);
 632         int time_remaining;
 633
 634         while (lock) {
 635                 time_remaining = lock->start_time + lock->timeout -
 636                         current_time;
 637                 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
 638                         if (!refresh_lock(lock)) {
 639                                 fprintf(stderr,
 640                                         "Unable to refresh lock for %s\n",
 641                                         lock->url);
 642                                 aborted = 1;
 643                                 return;
 644                         }
 645                 }
 646                 lock = lock->next;
 647         }
 648 }
 649
 650 static void release_request(struct transfer_request *request)
 651 {
 652         struct transfer_request *entry = request_queue_head;
 653
 654         if (request == request_queue_head) {
 655                 request_queue_head = request->next;
 656         } else {
 657                 while (entry->next != NULL && entry->next != request)
 658                         entry = entry->next;
 659                 if (entry->next == request)
 660                         entry->next = entry->next->next;
 661         }
 662
 663         if (request->local_fileno != -1)
 664                 close(request->local_fileno);
 665         if (request->local_stream)
 666                 fclose(request->local_stream);
 667         if (request->url != NULL)
 668                 free(request->url);
 669         free(request);
 670 }
 671
 672 static void finish_request(struct transfer_request *request)
 673 {
 674         struct stat st;
 675         struct packed_git *target;
 676         struct packed_git **lst;
 677
 678         request->curl_result = request->slot->curl_result;
 679         request->http_code = request->slot->http_code;
 680         request->slot = NULL;
 681
 682         /* Keep locks active */
 683         check_locks();
 684
 685         if (request->headers != NULL)
 686                 curl_slist_free_all(request->headers);
 687
 688         /* URL is reused for MOVE after PUT */
 689         if (request->state != RUN_PUT) {
 690                 free(request->url);
 691                 request->url = NULL;
 692         }
 693
 694         if (request->state == RUN_MKCOL) {
 695                 if (request->curl_result == CURLE_OK ||
 696                     request->http_code == 405) {
 697                         remote_dir_exists[request->obj->sha1[0]] = 1;
 698                         start_put(request);
 699                 } else {
 700                         fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
 701                                 sha1_to_hex(request->obj->sha1),
 702                                 request->curl_result, request->http_code);
 703                         request->state = ABORTED;
 704                         aborted = 1;
 705                 }
 706         } else if (request->state == RUN_PUT) {
 707                 if (request->curl_result == CURLE_OK) {
 708                         start_move(request);
 709                 } else {
 710                         fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
 711                                 sha1_to_hex(request->obj->sha1),
 712                                 request->curl_result, request->http_code);
 713                         request->state = ABORTED;
 714                         aborted = 1;
 715                 }
 716         } else if (request->state == RUN_MOVE) {
 717                 if (request->curl_result == CURLE_OK) {
 718                         if (push_verbosely)
 719                                 fprintf(stderr, "    sent %s\n",
 720                                         sha1_to_hex(request->obj->sha1));
 721                         request->obj->flags |= REMOTE;
 722                         release_request(request);
 723                 } else {
 724                         fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
 725                                 sha1_to_hex(request->obj->sha1),
 726                                 request->curl_result, request->http_code);
 727                         request->state = ABORTED;
 728                         aborted = 1;
 729                 }
 730         } else if (request->state == RUN_FETCH_LOOSE) {
 731                 fchmod(request->local_fileno, 0444);
 732                 close(request->local_fileno); request->local_fileno = -1;
 733
 734                 if (request->curl_result != CURLE_OK &&
 735                     request->http_code != 416) {
 736                         if (stat(request->tmpfile, &st) == 0) {
 737                                 if (st.st_size == 0)
 738                                         unlink(request->tmpfile);
 739                         }
 740                 } else {
 741                         if (request->http_code == 416)
 742                                 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
 743
 744                         inflateEnd(&request->stream);
 745                         SHA1_Final(request->real_sha1, &request->c);
 746                         if (request->zret != Z_STREAM_END) {
 747                                 unlink(request->tmpfile);
 748                         } else if (memcmp(request->obj->sha1, request->real_sha1, 20)) {
 749                                 unlink(request->tmpfile);
 750                         } else {
 751                                 request->rename =
 752                                         move_temp_to_file(
 753                                                 request->tmpfile,
 754                                                 request->filename);
 755                                 if (request->rename == 0) {
 756                                         request->obj->flags |= (LOCAL | REMOTE);
 757                                 }
 758                         }
 759                 }
 760
 761                 /* Try fetching packed if necessary */
 762                 if (request->obj->flags & LOCAL)
 763                         release_request(request);
 764                 else
 765                         start_fetch_packed(request);
 766
 767         } else if (request->state == RUN_FETCH_PACKED) {
 768                 if (request->curl_result != CURLE_OK) {
 769                         fprintf(stderr, "Unable to get pack file %s\n%s",
 770                                 request->url, curl_errorstr);
 771                         remote->can_update_info_refs = 0;
 772                 } else {
 773                         fclose(request->local_stream);
 774                         request->local_stream = NULL;
 775                         if (!move_temp_to_file(request->tmpfile,
 776                                                request->filename)) {
 777                                 target = (struct packed_git *)request->userData;
 778                                 lst = &remote->packs;
 779                                 while (*lst != target)
 780                                         lst = &((*lst)->next);
 781                                 *lst = (*lst)->next;
 782
 783                                 if (!verify_pack(target, 0))
 784                                         install_packed_git(target);
 785                                 else
 786                                         remote->can_update_info_refs = 0;
 787                         }
 788                 }
 789                 release_request(request);
 790         }
 791 }
 792
 793 #ifdef USE_CURL_MULTI
 794 void fill_active_slots(void)
 795 {
 796         struct transfer_request *request = request_queue_head;
 797         struct transfer_request *next;
 798         struct active_request_slot *slot = active_queue_head;
 799         int num_transfers;
 800
 801         if (aborted)
 802                 return;
 803
 804         while (active_requests < max_requests && request != NULL) {
 805                 next = request->next;
 806                 if (request->state == NEED_FETCH) {
 807                         start_fetch_loose(request);
 808                 } else if (pushing && request->state == NEED_PUSH) {
 809                         if (remote_dir_exists[request->obj->sha1[0]] == 1) {
 810                                 start_put(request);
 811                         } else {
 812                                 start_mkcol(request);
 813                         }
 814                         curl_multi_perform(curlm, &num_transfers);
 815                 }
 816                 request = next;
 817         }
 818
 819         while (slot != NULL) {
 820                 if (!slot->in_use && slot->curl != NULL) {
 821                         curl_easy_cleanup(slot->curl);
 822                         slot->curl = NULL;
 823                 }
 824                 slot = slot->next;
 825         }
 826 }
 827 #endif
 828
 829 static void get_remote_object_list(unsigned char parent);
 830
 831 static void add_fetch_request(struct object *obj)
 832 {
 833         struct transfer_request *request;
 834
 835         check_locks();
 836
 837         /*
 838          * Don't fetch the object if it's known to exist locally
 839          * or is already in the request queue
 840          */
 841         if (remote_dir_exists[obj->sha1[0]] == -1)
 842                 get_remote_object_list(obj->sha1[0]);
 843         if (obj->flags & (LOCAL | FETCHING))
 844                 return;
 845
 846         obj->flags |= FETCHING;
 847         request = xmalloc(sizeof(*request));
 848         request->obj = obj;
 849         request->url = NULL;
 850         request->lock = NULL;
 851         request->headers = NULL;
 852         request->local_fileno = -1;
 853         request->local_stream = NULL;
 854         request->state = NEED_FETCH;
 855         request->next = request_queue_head;
 856         request_queue_head = request;
 857
 858 #ifdef USE_CURL_MULTI
 859         fill_active_slots();
 860         step_active_slots();
 861 #endif
 862 }
 863
 864 static int add_send_request(struct object *obj, struct remote_lock *lock)
 865 {
 866         struct transfer_request *request = request_queue_head;
 867         struct packed_git *target;
 868
 869         /* Keep locks active */
 870         check_locks();
 871
 872         /*
 873          * Don't push the object if it's known to exist on the remote
 874          * or is already in the request queue
 875          */
 876         if (remote_dir_exists[obj->sha1[0]] == -1)
 877                 get_remote_object_list(obj->sha1[0]);
 878         if (obj->flags & (REMOTE | PUSHING))
 879                 return 0;
 880         target = find_sha1_pack(obj->sha1, remote->packs);
 881         if (target) {
 882                 obj->flags |= REMOTE;
 883                 return 0;
 884         }
 885
 886         obj->flags |= PUSHING;
 887         request = xmalloc(sizeof(*request));
 888         request->obj = obj;
 889         request->url = NULL;
 890         request->lock = lock;
 891         request->headers = NULL;
 892         request->local_fileno = -1;
 893         request->local_stream = NULL;
 894         request->state = NEED_PUSH;
 895         request->next = request_queue_head;
 896         request_queue_head = request;
 897
 898 #ifdef USE_CURL_MULTI
 899         fill_active_slots();
 900         step_active_slots();
 901 #endif
 902
 903         return 1;
 904 }
 905
 906 static int fetch_index(unsigned char *sha1)
 907 {
 908         char *hex = sha1_to_hex(sha1);
 909         char *filename;
 910         char *url;
 911         char tmpfile[PATH_MAX];
 912         long prev_posn = 0;
 913         char range[RANGE_HEADER_SIZE];
 914         struct curl_slist *range_header = NULL;
 915
 916         FILE *indexfile;
 917         struct active_request_slot *slot;
 918         struct slot_results results;
 919
 920         /* Don't use the index if the pack isn't there */
 921         url = xmalloc(strlen(remote->url) + 64);
 922         sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
 923         slot = get_active_slot();
 924         slot->results = &results;
 925         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 926         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
 927         if (start_active_slot(slot)) {
 928                 run_active_slot(slot);
 929                 if (results.curl_result != CURLE_OK) {
 930                         free(url);
 931                         return error("Unable to verify pack %s is available",
 932                                      hex);
 933                 }
 934         } else {
 935                 return error("Unable to start request");
 936         }
 937
 938         if (has_pack_index(sha1))
 939                 return 0;
 940
 941         if (push_verbosely)
 942                 fprintf(stderr, "Getting index for pack %s\n", hex);
 943
 944         sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
 945
 946         filename = sha1_pack_index_name(sha1);
 947         snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
 948         indexfile = fopen(tmpfile, "a");
 949         if (!indexfile)
 950                 return error("Unable to open local file %s for pack index",
 951                              filename);
 952
 953         slot = get_active_slot();
 954         slot->results = &results;
 955         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
 956         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 957         curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
 958         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
 959         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 960         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 961         slot->local = indexfile;
 962
 963         /* If there is data present from a previous transfer attempt,
 964            resume where it left off */
 965         prev_posn = ftell(indexfile);
 966         if (prev_posn>0) {
 967                 if (push_verbosely)
 968                         fprintf(stderr,
 969                                 "Resuming fetch of index for pack %s at byte %ld\n",
 970                                 hex, prev_posn);
 971                 sprintf(range, "Range: bytes=%ld-", prev_posn);
 972                 range_header = curl_slist_append(range_header, range);
 973                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
 974         }
 975
 976         if (start_active_slot(slot)) {
 977                 run_active_slot(slot);
 978                 if (results.curl_result != CURLE_OK) {
 979                         free(url);
 980                         fclose(indexfile);
 981                         return error("Unable to get pack index %s\n%s", url,
 982                                      curl_errorstr);
 983                 }
 984         } else {
 985                 free(url);
 986                 fclose(indexfile);
 987                 return error("Unable to start request");
 988         }
 989
 990         free(url);
 991         fclose(indexfile);
 992
 993         return move_temp_to_file(tmpfile, filename);
 994 }
 995
 996 static int setup_index(unsigned char *sha1)
 997 {
 998         struct packed_git *new_pack;
 999
1000         if (fetch_index(sha1))
1001                 return -1;
1002
1003         new_pack = parse_pack_index(sha1);
1004         new_pack->next = remote->packs;
1005         remote->packs = new_pack;
1006         return 0;
1007 }
1008
1009 static int fetch_indices(void)
1010 {
1011         unsigned char sha1[20];
1012         char *url;
1013         struct buffer buffer;
1014         char *data;
1015         int i = 0;
1016
1017         struct active_request_slot *slot;
1018         struct slot_results results;
1019
1020         data = xcalloc(1, 4096);
1021         buffer.size = 4096;
1022         buffer.posn = 0;
1023         buffer.buffer = data;
1024
1025         if (push_verbosely)
1026                 fprintf(stderr, "Getting pack list\n");
1027
1028         url = xmalloc(strlen(remote->url) + 20);
1029         sprintf(url, "%sobjects/info/packs", remote->url);
1030
1031         slot = get_active_slot();
1032         slot->results = &results;
1033         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1034         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1035         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1036         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1037         if (start_active_slot(slot)) {
1038                 run_active_slot(slot);
1039                 if (results.curl_result != CURLE_OK) {
1040                         free(buffer.buffer);
1041                         free(url);
1042                         if (results.http_code == 404)
1043                                 return 0;
1044                         else
1045                                 return error("%s", curl_errorstr);
1046                 }
1047         } else {
1048                 free(buffer.buffer);
1049                 free(url);
1050                 return error("Unable to start request");
1051         }
1052         free(url);
1053
1054         data = buffer.buffer;
1055         while (i < buffer.posn) {
1056                 switch (data[i]) {
1057                 case 'P':
1058                         i++;
1059                         if (i + 52 < buffer.posn &&
1060                             !strncmp(data + i, " pack-", 6) &&
1061                             !strncmp(data + i + 46, ".pack\n", 6)) {
1062                                 get_sha1_hex(data + i + 6, sha1);
1063                                 setup_index(sha1);
1064                                 i += 51;
1065                                 break;
1066                         }
1067                 default:
1068                         while (data[i] != '\n')
1069                                 i++;
1070                 }
1071                 i++;
1072         }
1073
1074         free(buffer.buffer);
1075         return 0;
1076 }
1077
1078 static inline int needs_quote(int ch)
1079 {
1080         switch (ch) {
1081         case '/': case '-': case '.':
1082         case 'A'...'Z': case 'a'...'z': case '0'...'9':
1083                 return 0;
1084         default:
1085                 return 1;
1086         }
1087 }
1088
1089 static inline int hex(int v)
1090 {
1091         if (v < 10) return '0' + v;
1092         else return 'A' + v - 10;
1093 }
1094
1095 static char *quote_ref_url(const char *base, const char *ref)
1096 {
1097         const char *cp;
1098         char *dp, *qref;
1099         int len, baselen, ch;
1100
1101         baselen = strlen(base);
1102         len = baselen + 1;
1103         for (cp = ref; (ch = *cp) != 0; cp++, len++)
1104                 if (needs_quote(ch))
1105                         len += 2; /* extra two hex plus replacement % */
1106         qref = xmalloc(len);
1107         memcpy(qref, base, baselen);
1108         for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1109                 if (needs_quote(ch)) {
1110                         *dp++ = '%';
1111                         *dp++ = hex((ch >> 4) & 0xF);
1112                         *dp++ = hex(ch & 0xF);
1113                 }
1114                 else
1115                         *dp++ = ch;
1116         }
1117         *dp = 0;
1118
1119         return qref;
1120 }
1121
1122 int fetch_ref(char *ref, unsigned char *sha1)
1123 {
1124         char *url;
1125         char hex[42];
1126         struct buffer buffer;
1127         char *base = remote->url;
1128         struct active_request_slot *slot;
1129         struct slot_results results;
1130         buffer.size = 41;
1131         buffer.posn = 0;
1132         buffer.buffer = hex;
1133         hex[41] = '\0';
1134
1135         url = quote_ref_url(base, ref);
1136         slot = get_active_slot();
1137         slot->results = &results;
1138         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1139         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1140         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1141         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1142         if (start_active_slot(slot)) {
1143                 run_active_slot(slot);
1144                 if (results.curl_result != CURLE_OK)
1145                         return error("Couldn't get %s for %s\n%s",
1146                                      url, ref, curl_errorstr);
1147         } else {
1148                 return error("Unable to start request");
1149         }
1150
1151         hex[40] = '\0';
1152         get_sha1_hex(hex, sha1);
1153         return 0;
1154 }
1155
1156 static void one_remote_object(const char *hex)
1157 {
1158         unsigned char sha1[20];
1159         struct object *obj;
1160
1161         if (get_sha1_hex(hex, sha1) != 0)
1162                 return;
1163
1164         obj = lookup_object(sha1);
1165         if (!obj)
1166                 obj = parse_object(sha1);
1167
1168         /* Ignore remote objects that don't exist locally */
1169         if (!obj)
1170                 return;
1171
1172         obj->flags |= REMOTE;
1173         if (!object_list_contains(objects, obj))
1174                 add_object(obj, &objects, NULL, "");
1175 }
1176
1177 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1178 {
1179         int *lock_flags = (int *)ctx->userData;
1180
1181         if (tag_closed) {
1182                 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1183                         if ((*lock_flags & DAV_PROP_LOCKEX) &&
1184                             (*lock_flags & DAV_PROP_LOCKWR)) {
1185                                 *lock_flags |= DAV_LOCK_OK;
1186                         }
1187                         *lock_flags &= DAV_LOCK_OK;
1188                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1189                         *lock_flags |= DAV_PROP_LOCKWR;
1190                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1191                         *lock_flags |= DAV_PROP_LOCKEX;
1192                 }
1193         }
1194 }
1195
1196 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1197 {
1198         struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1199
1200         if (tag_closed && ctx->cdata) {
1201                 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1202                         lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1203                         strcpy(lock->owner, ctx->cdata);
1204                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1205                         if (!strncmp(ctx->cdata, "Second-", 7))
1206                                 lock->timeout =
1207                                         strtol(ctx->cdata + 7, NULL, 10);
1208                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1209                         if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
1210                                 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1211                                 strcpy(lock->token, ctx->cdata + 16);
1212                         }
1213                 }
1214         }
1215 }
1216
1217 static void one_remote_ref(char *refname);
1218
1219 static void
1220 xml_start_tag(void *userData, const char *name, const char **atts)
1221 {
1222         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1223         const char *c = strchr(name, ':');
1224         int new_len;
1225
1226         if (c == NULL)
1227                 c = name;
1228         else
1229                 c++;
1230
1231         new_len = strlen(ctx->name) + strlen(c) + 2;
1232
1233         if (new_len > ctx->len) {
1234                 ctx->name = xrealloc(ctx->name, new_len);
1235                 ctx->len = new_len;
1236         }
1237         strcat(ctx->name, ".");
1238         strcat(ctx->name, c);
1239
1240         if (ctx->cdata) {
1241                 free(ctx->cdata);
1242                 ctx->cdata = NULL;
1243         }
1244
1245         ctx->userFunc(ctx, 0);
1246 }
1247
1248 static void
1249 xml_end_tag(void *userData, const char *name)
1250 {
1251         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1252         const char *c = strchr(name, ':');
1253         char *ep;
1254
1255         ctx->userFunc(ctx, 1);
1256
1257         if (c == NULL)
1258                 c = name;
1259         else
1260                 c++;
1261
1262         ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1263         *ep = 0;
1264 }
1265
1266 static void
1267 xml_cdata(void *userData, const XML_Char *s, int len)
1268 {
1269         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1270         if (ctx->cdata)
1271                 free(ctx->cdata);
1272         ctx->cdata = xcalloc(len+1, 1);
1273         strncpy(ctx->cdata, s, len);
1274 }
1275
1276 static struct remote_lock *lock_remote(char *path, long timeout)
1277 {
1278         struct active_request_slot *slot;
1279         struct slot_results results;
1280         struct buffer out_buffer;
1281         struct buffer in_buffer;
1282         char *out_data;
1283         char *in_data;
1284         char *url;
1285         char *ep;
1286         char timeout_header[25];
1287         struct remote_lock *lock = NULL;
1288         XML_Parser parser = XML_ParserCreate(NULL);
1289         enum XML_Status result;
1290         struct curl_slist *dav_headers = NULL;
1291         struct xml_ctx ctx;
1292
1293         url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1294         sprintf(url, "%s%s", remote->url, path);
1295
1296         /* Make sure leading directories exist for the remote ref */
1297         ep = strchr(url + strlen(remote->url) + 11, '/');
1298         while (ep) {
1299                 *ep = 0;
1300                 slot = get_active_slot();
1301                 slot->results = &results;
1302                 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1303                 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1304                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1305                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1306                 if (start_active_slot(slot)) {
1307                         run_active_slot(slot);
1308                         if (results.curl_result != CURLE_OK &&
1309                             results.http_code != 405) {
1310                                 fprintf(stderr,
1311                                         "Unable to create branch path %s\n",
1312                                         url);
1313                                 free(url);
1314                                 return NULL;
1315                         }
1316                 } else {
1317                         fprintf(stderr, "Unable to start MKCOL request\n");
1318                         free(url);
1319                         return NULL;
1320                 }
1321                 *ep = '/';
1322                 ep = strchr(ep + 1, '/');
1323         }
1324
1325         out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1326         out_data = xmalloc(out_buffer.size + 1);
1327         snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1328         out_buffer.posn = 0;
1329         out_buffer.buffer = out_data;
1330
1331         in_buffer.size = 4096;
1332         in_data = xmalloc(in_buffer.size);
1333         in_buffer.posn = 0;
1334         in_buffer.buffer = in_data;
1335
1336         sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1337         dav_headers = curl_slist_append(dav_headers, timeout_header);
1338         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1339
1340         slot = get_active_slot();
1341         slot->results = &results;
1342         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1343         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1344         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1345         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1346         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1347         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1348         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1349         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1350         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1351
1352         lock = xcalloc(1, sizeof(*lock));
1353         lock->timeout = -1;
1354
1355         if (start_active_slot(slot)) {
1356                 run_active_slot(slot);
1357                 if (results.curl_result == CURLE_OK) {
1358                         ctx.name = xcalloc(10, 1);
1359                         ctx.len = 0;
1360                         ctx.cdata = NULL;
1361                         ctx.userFunc = handle_new_lock_ctx;
1362                         ctx.userData = lock;
1363                         XML_SetUserData(parser, &ctx);
1364                         XML_SetElementHandler(parser, xml_start_tag,
1365                                               xml_end_tag);
1366                         XML_SetCharacterDataHandler(parser, xml_cdata);
1367                         result = XML_Parse(parser, in_buffer.buffer,
1368                                            in_buffer.posn, 1);
1369                         free(ctx.name);
1370                         if (result != XML_STATUS_OK) {
1371                                 fprintf(stderr, "XML error: %s\n",
1372                                         XML_ErrorString(
1373                                                 XML_GetErrorCode(parser)));
1374                                 lock->timeout = -1;
1375                         }
1376                 }
1377         } else {
1378                 fprintf(stderr, "Unable to start LOCK request\n");
1379         }
1380
1381         curl_slist_free_all(dav_headers);
1382         free(out_data);
1383         free(in_data);
1384
1385         if (lock->token == NULL || lock->timeout <= 0) {
1386                 if (lock->token != NULL)
1387                         free(lock->token);
1388                 if (lock->owner != NULL)
1389                         free(lock->owner);
1390                 free(url);
1391                 free(lock);
1392                 lock = NULL;
1393         } else {
1394                 lock->url = url;
1395                 lock->start_time = time(NULL);
1396                 lock->next = remote->locks;
1397                 remote->locks = lock;
1398         }
1399
1400         return lock;
1401 }
1402
1403 static int unlock_remote(struct remote_lock *lock)
1404 {
1405         struct active_request_slot *slot;
1406         struct slot_results results;
1407         struct remote_lock *prev = remote->locks;
1408         char *lock_token_header;
1409         struct curl_slist *dav_headers = NULL;
1410         int rc = 0;
1411
1412         lock_token_header = xmalloc(strlen(lock->token) + 31);
1413         sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1414                 lock->token);
1415         dav_headers = curl_slist_append(dav_headers, lock_token_header);
1416
1417         slot = get_active_slot();
1418         slot->results = &results;
1419         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1420         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1421         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1422         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1423
1424         if (start_active_slot(slot)) {
1425                 run_active_slot(slot);
1426                 if (results.curl_result == CURLE_OK)
1427                         rc = 1;
1428                 else
1429                         fprintf(stderr, "UNLOCK HTTP error %ld\n",
1430                                 results.http_code);
1431         } else {
1432                 fprintf(stderr, "Unable to start UNLOCK request\n");
1433         }
1434
1435         curl_slist_free_all(dav_headers);
1436         free(lock_token_header);
1437
1438         if (remote->locks == lock) {
1439                 remote->locks = lock->next;
1440         } else {
1441                 while (prev && prev->next != lock)
1442                         prev = prev->next;
1443                 if (prev)
1444                         prev->next = prev->next->next;
1445         }
1446
1447         if (lock->owner != NULL)
1448                 free(lock->owner);
1449         free(lock->url);
1450         free(lock->token);
1451         free(lock);
1452
1453         return rc;
1454 }
1455
1456 static void remote_ls(const char *path, int flags,
1457                       void (*userFunc)(struct remote_ls_ctx *ls),
1458                       void *userData);
1459
1460 static void process_ls_object(struct remote_ls_ctx *ls)
1461 {
1462         unsigned int *parent = (unsigned int *)ls->userData;
1463         char *path = ls->dentry_name;
1464         char *obj_hex;
1465
1466         if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1467                 remote_dir_exists[*parent] = 1;
1468                 return;
1469         }
1470
1471         if (strlen(path) != 49)
1472                 return;
1473         path += 8;
1474         obj_hex = xmalloc(strlen(path));
1475         strncpy(obj_hex, path, 2);
1476         strcpy(obj_hex + 2, path + 3);
1477         one_remote_object(obj_hex);
1478         free(obj_hex);
1479 }
1480
1481 static void process_ls_ref(struct remote_ls_ctx *ls)
1482 {
1483         if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1484                 fprintf(stderr, "  %s\n", ls->dentry_name);
1485                 return;
1486         }
1487
1488         if (!(ls->dentry_flags & IS_DIR))
1489                 one_remote_ref(ls->dentry_name);
1490 }
1491
1492 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1493 {
1494         struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1495
1496         if (tag_closed) {
1497                 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1498                         if (ls->dentry_flags & IS_DIR) {
1499                                 if (ls->flags & PROCESS_DIRS) {
1500                                         ls->userFunc(ls);
1501                                 }
1502                                 if (strcmp(ls->dentry_name, ls->path) &&
1503                                     ls->flags & RECURSIVE) {
1504                                         remote_ls(ls->dentry_name,
1505                                                   ls->flags,
1506                                                   ls->userFunc,
1507                                                   ls->userData);
1508                                 }
1509                         } else if (ls->flags & PROCESS_FILES) {
1510                                 ls->userFunc(ls);
1511                         }
1512                 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1513                         ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1514                                                   remote->path_len + 1);
1515                         strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1516                 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1517                         ls->dentry_flags |= IS_DIR;
1518                 }
1519         } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1520                 if (ls->dentry_name) {
1521                         free(ls->dentry_name);
1522                 }
1523                 ls->dentry_name = NULL;
1524                 ls->dentry_flags = 0;
1525         }
1526 }
1527
1528 static void remote_ls(const char *path, int flags,
1529                       void (*userFunc)(struct remote_ls_ctx *ls),
1530                       void *userData)
1531 {
1532         char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1533         struct active_request_slot *slot;
1534         struct slot_results results;
1535         struct buffer in_buffer;
1536         struct buffer out_buffer;
1537         char *in_data;
1538         char *out_data;
1539         XML_Parser parser = XML_ParserCreate(NULL);
1540         enum XML_Status result;
1541         struct curl_slist *dav_headers = NULL;
1542         struct xml_ctx ctx;
1543         struct remote_ls_ctx ls;
1544
1545         ls.flags = flags;
1546         ls.path = strdup(path);
1547         ls.dentry_name = NULL;
1548         ls.dentry_flags = 0;
1549         ls.userData = userData;
1550         ls.userFunc = userFunc;
1551
1552         sprintf(url, "%s%s", remote->url, path);
1553
1554         out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1555         out_data = xmalloc(out_buffer.size + 1);
1556         snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1557         out_buffer.posn = 0;
1558         out_buffer.buffer = out_data;
1559
1560         in_buffer.size = 4096;
1561         in_data = xmalloc(in_buffer.size);
1562         in_buffer.posn = 0;
1563         in_buffer.buffer = in_data;
1564
1565         dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1566         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1567
1568         slot = get_active_slot();
1569         slot->results = &results;
1570         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1571         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1572         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1573         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1574         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1575         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1576         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1577         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1578         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1579
1580         if (start_active_slot(slot)) {
1581                 run_active_slot(slot);
1582                 if (results.curl_result == CURLE_OK) {
1583                         ctx.name = xcalloc(10, 1);
1584                         ctx.len = 0;
1585                         ctx.cdata = NULL;
1586                         ctx.userFunc = handle_remote_ls_ctx;
1587                         ctx.userData = &ls;
1588                         XML_SetUserData(parser, &ctx);
1589                         XML_SetElementHandler(parser, xml_start_tag,
1590                                               xml_end_tag);
1591                         XML_SetCharacterDataHandler(parser, xml_cdata);
1592                         result = XML_Parse(parser, in_buffer.buffer,
1593                                            in_buffer.posn, 1);
1594                         free(ctx.name);
1595
1596                         if (result != XML_STATUS_OK) {
1597                                 fprintf(stderr, "XML error: %s\n",
1598                                         XML_ErrorString(
1599                                                 XML_GetErrorCode(parser)));
1600                         }
1601                 }
1602         } else {
1603                 fprintf(stderr, "Unable to start PROPFIND request\n");
1604         }
1605
1606         free(ls.path);
1607         free(url);
1608         free(out_data);
1609         free(in_buffer.buffer);
1610         curl_slist_free_all(dav_headers);
1611 }
1612
1613 static void get_remote_object_list(unsigned char parent)
1614 {
1615         char path[] = "objects/XX/";
1616         static const char hex[] = "0123456789abcdef";
1617         unsigned int val = parent;
1618
1619         path[8] = hex[val >> 4];
1620         path[9] = hex[val & 0xf];
1621         remote_dir_exists[val] = 0;
1622         remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1623                   process_ls_object, &val);
1624 }
1625
1626 static int locking_available(void)
1627 {
1628         struct active_request_slot *slot;
1629         struct slot_results results;
1630         struct buffer in_buffer;
1631         struct buffer out_buffer;
1632         char *in_data;
1633         char *out_data;
1634         XML_Parser parser = XML_ParserCreate(NULL);
1635         enum XML_Status result;
1636         struct curl_slist *dav_headers = NULL;
1637         struct xml_ctx ctx;
1638         int lock_flags = 0;
1639
1640         out_buffer.size =
1641                 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1642                 strlen(remote->url) - 2;
1643         out_data = xmalloc(out_buffer.size + 1);
1644         snprintf(out_data, out_buffer.size + 1,
1645                  PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1646         out_buffer.posn = 0;
1647         out_buffer.buffer = out_data;
1648
1649         in_buffer.size = 4096;
1650         in_data = xmalloc(in_buffer.size);
1651         in_buffer.posn = 0;
1652         in_buffer.buffer = in_data;
1653
1654         dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1655         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1656
1657         slot = get_active_slot();
1658         slot->results = &results;
1659         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1660         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1661         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1662         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1663         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1664         curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1665         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1666         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1667         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1668
1669         if (start_active_slot(slot)) {
1670                 run_active_slot(slot);
1671                 if (results.curl_result == CURLE_OK) {
1672                         ctx.name = xcalloc(10, 1);
1673                         ctx.len = 0;
1674                         ctx.cdata = NULL;
1675                         ctx.userFunc = handle_lockprop_ctx;
1676                         ctx.userData = &lock_flags;
1677                         XML_SetUserData(parser, &ctx);
1678                         XML_SetElementHandler(parser, xml_start_tag,
1679                                               xml_end_tag);
1680                         result = XML_Parse(parser, in_buffer.buffer,
1681                                            in_buffer.posn, 1);
1682                         free(ctx.name);
1683
1684                         if (result != XML_STATUS_OK) {
1685                                 fprintf(stderr, "XML error: %s\n",
1686                                         XML_ErrorString(
1687                                                 XML_GetErrorCode(parser)));
1688                                 lock_flags = 0;
1689                         }
1690                 }
1691         } else {
1692                 fprintf(stderr, "Unable to start PROPFIND request\n");
1693         }
1694
1695         free(out_data);
1696         free(in_buffer.buffer);
1697         curl_slist_free_all(dav_headers);
1698
1699         return lock_flags;
1700 }
1701
1702 static struct object_list **process_blob(struct blob *blob,
1703                                          struct object_list **p,
1704                                          struct name_path *path,
1705                                          const char *name)
1706 {
1707         struct object *obj = &blob->object;
1708
1709         obj->flags |= LOCAL;
1710
1711         if (obj->flags & (UNINTERESTING | SEEN))
1712                 return p;
1713
1714         obj->flags |= SEEN;
1715         name = strdup(name);
1716         return add_object(obj, p, path, name);
1717 }
1718
1719 static struct object_list **process_tree(struct tree *tree,
1720                                          struct object_list **p,
1721                                          struct name_path *path,
1722                                          const char *name)
1723 {
1724         struct object *obj = &tree->object;
1725         struct tree_desc desc;
1726         struct name_entry entry;
1727         struct name_path me;
1728
1729         obj->flags |= LOCAL;
1730
1731         if (obj->flags & (UNINTERESTING | SEEN))
1732                 return p;
1733         if (parse_tree(tree) < 0)
1734                 die("bad tree object %s", sha1_to_hex(obj->sha1));
1735
1736         obj->flags |= SEEN;
1737         name = strdup(name);
1738         p = add_object(obj, p, NULL, name);
1739         me.up = path;
1740         me.elem = name;
1741         me.elem_len = strlen(name);
1742
1743         desc.buf = tree->buffer;
1744         desc.size = tree->size;
1745
1746         while (tree_entry(&desc, &entry)) {
1747                 if (S_ISDIR(entry.mode))
1748                         p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1749                 else
1750                         p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1751         }
1752         free(tree->buffer);
1753         tree->buffer = NULL;
1754         return p;
1755 }
1756
1757 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1758 {
1759         struct commit *commit;
1760         struct object_list **p = &objects, *pending;
1761         int count = 0;
1762
1763         while ((commit = get_revision(revs)) != NULL) {
1764                 p = process_tree(commit->tree, p, NULL, "");
1765                 commit->object.flags |= LOCAL;
1766                 if (!(commit->object.flags & UNINTERESTING))
1767                         count += add_send_request(&commit->object, lock);
1768         }
1769
1770         for (pending = revs->pending_objects; pending; pending = pending->next) {
1771                 struct object *obj = pending->item;
1772                 const char *name = pending->name;
1773
1774                 if (obj->flags & (UNINTERESTING | SEEN))
1775                         continue;
1776                 if (obj->type == tag_type) {
1777                         obj->flags |= SEEN;
1778                         p = add_object(obj, p, NULL, name);
1779                         continue;
1780                 }
1781                 if (obj->type == tree_type) {
1782                         p = process_tree((struct tree *)obj, p, NULL, name);
1783                         continue;
1784                 }
1785                 if (obj->type == blob_type) {
1786                         p = process_blob((struct blob *)obj, p, NULL, name);
1787                         continue;
1788                 }
1789                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1790         }
1791
1792         while (objects) {
1793                 if (!(objects->item->flags & UNINTERESTING))
1794                         count += add_send_request(objects->item, lock);
1795                 objects = objects->next;
1796         }
1797
1798         return count;
1799 }
1800
1801 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1802 {
1803         struct active_request_slot *slot;
1804         struct slot_results results;
1805         char *out_data;
1806         char *if_header;
1807         struct buffer out_buffer;
1808         struct curl_slist *dav_headers = NULL;
1809         int i;
1810
1811         if_header = xmalloc(strlen(lock->token) + 25);
1812         sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1813         dav_headers = curl_slist_append(dav_headers, if_header);
1814
1815         out_buffer.size = 41;
1816         out_data = xmalloc(out_buffer.size + 1);
1817         i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1818         if (i != out_buffer.size) {
1819                 fprintf(stderr, "Unable to initialize PUT request body\n");
1820                 return 0;
1821         }
1822         out_buffer.posn = 0;
1823         out_buffer.buffer = out_data;
1824
1825         slot = get_active_slot();
1826         slot->results = &results;
1827         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1828         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1829         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1830         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1831         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1832         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1833         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1834         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1835         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1836
1837         if (start_active_slot(slot)) {
1838                 run_active_slot(slot);
1839                 free(out_data);
1840                 free(if_header);
1841                 if (results.curl_result != CURLE_OK) {
1842                         fprintf(stderr,
1843                                 "PUT error: curl result=%d, HTTP code=%ld\n",
1844                                 results.curl_result, results.http_code);
1845                         /* We should attempt recovery? */
1846                         return 0;
1847                 }
1848         } else {
1849                 free(out_data);
1850                 free(if_header);
1851                 fprintf(stderr, "Unable to start PUT request\n");
1852                 return 0;
1853         }
1854
1855         return 1;
1856 }
1857
1858 static struct ref *local_refs, **local_tail;
1859 static struct ref *remote_refs, **remote_tail;
1860
1861 static int one_local_ref(const char *refname, const unsigned char *sha1)
1862 {
1863         struct ref *ref;
1864         int len = strlen(refname) + 1;
1865         ref = xcalloc(1, sizeof(*ref) + len);
1866         memcpy(ref->new_sha1, sha1, 20);
1867         memcpy(ref->name, refname, len);
1868         *local_tail = ref;
1869         local_tail = &ref->next;
1870         return 0;
1871 }
1872
1873 static void one_remote_ref(char *refname)
1874 {
1875         struct ref *ref;
1876         unsigned char remote_sha1[20];
1877         struct object *obj;
1878         int len = strlen(refname) + 1;
1879
1880         if (fetch_ref(refname, remote_sha1) != 0) {
1881                 fprintf(stderr,
1882                         "Unable to fetch ref %s from %s\n",
1883                         refname, remote->url);
1884                 return;
1885         }
1886
1887         /*
1888          * Fetch a copy of the object if it doesn't exist locally - it
1889          * may be required for updating server info later.
1890          */
1891         if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1892                 obj = lookup_unknown_object(remote_sha1);
1893                 if (obj) {
1894                         fprintf(stderr, "  fetch %s for %s\n",
1895                                 sha1_to_hex(remote_sha1), refname);
1896                         add_fetch_request(obj);
1897                 }
1898         }
1899
1900         ref = xcalloc(1, sizeof(*ref) + len);
1901         memcpy(ref->old_sha1, remote_sha1, 20);
1902         memcpy(ref->name, refname, len);
1903         *remote_tail = ref;
1904         remote_tail = &ref->next;
1905 }
1906
1907 static void get_local_heads(void)
1908 {
1909         local_tail = &local_refs;
1910         for_each_ref(one_local_ref);
1911 }
1912
1913 static void get_dav_remote_heads(void)
1914 {
1915         remote_tail = &remote_refs;
1916         remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1917 }
1918
1919 static int is_zero_sha1(const unsigned char *sha1)
1920 {
1921         int i;
1922
1923         for (i = 0; i < 20; i++) {
1924                 if (*sha1++)
1925                         return 0;
1926         }
1927         return 1;
1928 }
1929
1930 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1931 {
1932         while (list) {
1933                 struct commit_list *temp = list;
1934                 temp->item->object.flags &= ~mark;
1935                 list = temp->next;
1936                 free(temp);
1937         }
1938 }
1939
1940 static int ref_newer(const unsigned char *new_sha1,
1941                      const unsigned char *old_sha1)
1942 {
1943         struct object *o;
1944         struct commit *old, *new;
1945         struct commit_list *list, *used;
1946         int found = 0;
1947
1948         /* Both new and old must be commit-ish and new is descendant of
1949          * old.  Otherwise we require --force.
1950          */
1951         o = deref_tag(parse_object(old_sha1), NULL, 0);
1952         if (!o || o->type != commit_type)
1953                 return 0;
1954         old = (struct commit *) o;
1955
1956         o = deref_tag(parse_object(new_sha1), NULL, 0);
1957         if (!o || o->type != commit_type)
1958                 return 0;
1959         new = (struct commit *) o;
1960
1961         if (parse_commit(new) < 0)
1962                 return 0;
1963
1964         used = list = NULL;
1965         commit_list_insert(new, &list);
1966         while (list) {
1967                 new = pop_most_recent_commit(&list, TMP_MARK);
1968                 commit_list_insert(new, &used);
1969                 if (new == old) {
1970                         found = 1;
1971                         break;
1972                 }
1973         }
1974         unmark_and_free(list, TMP_MARK);
1975         unmark_and_free(used, TMP_MARK);
1976         return found;
1977 }
1978
1979 static void mark_edge_parents_uninteresting(struct commit *commit)
1980 {
1981         struct commit_list *parents;
1982
1983         for (parents = commit->parents; parents; parents = parents->next) {
1984                 struct commit *parent = parents->item;
1985                 if (!(parent->object.flags & UNINTERESTING))
1986                         continue;
1987                 mark_tree_uninteresting(parent->tree);
1988         }
1989 }
1990
1991 static void mark_edges_uninteresting(struct commit_list *list)
1992 {
1993         for ( ; list; list = list->next) {
1994                 struct commit *commit = list->item;
1995
1996                 if (commit->object.flags & UNINTERESTING) {
1997                         mark_tree_uninteresting(commit->tree);
1998                         continue;
1999                 }
2000                 mark_edge_parents_uninteresting(commit);
2001         }
2002 }
2003
2004 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2005 {
2006         struct buffer *buf = (struct buffer *)ls->userData;
2007         unsigned char remote_sha1[20];
2008         struct object *o;
2009         int len;
2010         char *ref_info;
2011
2012         if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2013                 fprintf(stderr,
2014                         "Unable to fetch ref %s from %s\n",
2015                         ls->dentry_name, remote->url);
2016                 aborted = 1;
2017                 return;
2018         }
2019
2020         o = parse_object(remote_sha1);
2021         if (!o) {
2022                 fprintf(stderr,
2023                         "Unable to parse object %s for remote ref %s\n",
2024                         sha1_to_hex(remote_sha1), ls->dentry_name);
2025                 aborted = 1;
2026                 return;
2027         }
2028
2029         len = strlen(ls->dentry_name) + 42;
2030         ref_info = xcalloc(len + 1, 1);
2031         sprintf(ref_info, "%s   %s\n",
2032                 sha1_to_hex(remote_sha1), ls->dentry_name);
2033         fwrite_buffer(ref_info, 1, len, buf);
2034         free(ref_info);
2035
2036         if (o->type == tag_type) {
2037                 o = deref_tag(o, ls->dentry_name, 0);
2038                 if (o) {
2039                         len = strlen(ls->dentry_name) + 45;
2040                         ref_info = xcalloc(len + 1, 1);
2041                         sprintf(ref_info, "%s   %s^{}\n",
2042                                 sha1_to_hex(o->sha1), ls->dentry_name);
2043                         fwrite_buffer(ref_info, 1, len, buf);
2044                         free(ref_info);
2045                 }
2046         }
2047 }
2048
2049 static void update_remote_info_refs(struct remote_lock *lock)
2050 {
2051         struct buffer buffer;
2052         struct active_request_slot *slot;
2053         struct slot_results results;
2054         char *if_header;
2055         struct curl_slist *dav_headers = NULL;
2056
2057         buffer.buffer = xcalloc(1, 4096);
2058         buffer.size = 4096;
2059         buffer.posn = 0;
2060         remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2061                   add_remote_info_ref, &buffer);
2062         if (!aborted) {
2063                 if_header = xmalloc(strlen(lock->token) + 25);
2064                 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2065                 dav_headers = curl_slist_append(dav_headers, if_header);
2066
2067                 slot = get_active_slot();
2068                 slot->results = &results;
2069                 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2070                 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2071                 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2072                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2073                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2074                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2075                 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2076                 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2077                 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2078
2079                 buffer.posn = 0;
2080
2081                 if (start_active_slot(slot)) {
2082                         run_active_slot(slot);
2083                         if (results.curl_result != CURLE_OK) {
2084                                 fprintf(stderr,
2085                                         "PUT error: curl result=%d, HTTP code=%ld\n",
2086                                         results.curl_result, results.http_code);
2087                         }
2088                 }
2089                 free(if_header);
2090         }
2091         free(buffer.buffer);
2092 }
2093
2094 static int remote_exists(const char *path)
2095 {
2096         char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2097         struct active_request_slot *slot;
2098         struct slot_results results;
2099
2100         sprintf(url, "%s%s", remote->url, path);
2101
2102         slot = get_active_slot();
2103         slot->results = &results;
2104         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2105         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2106
2107         if (start_active_slot(slot)) {
2108                 run_active_slot(slot);
2109                 if (results.http_code == 404)
2110                         return 0;
2111                 else if (results.curl_result == CURLE_OK)
2112                         return 1;
2113                 else
2114                         fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2115         } else {
2116                 fprintf(stderr, "Unable to start HEAD request\n");
2117         }
2118
2119         return -1;
2120 }
2121
2122 static void fetch_symref(char *path, char **symref, unsigned char *sha1)
2123 {
2124         char *url;
2125         struct buffer buffer;
2126         struct active_request_slot *slot;
2127         struct slot_results results;
2128
2129         url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2130         sprintf(url, "%s%s", remote->url, path);
2131
2132         buffer.size = 4096;
2133         buffer.posn = 0;
2134         buffer.buffer = xmalloc(buffer.size);
2135
2136         slot = get_active_slot();
2137         slot->results = &results;
2138         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2139         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2140         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2141         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2142         if (start_active_slot(slot)) {
2143                 run_active_slot(slot);
2144                 if (results.curl_result != CURLE_OK) {
2145                         die("Couldn't get %s for remote symref\n%s",
2146                             url, curl_errorstr);
2147                 }
2148         } else {
2149                 die("Unable to start remote symref request");
2150         }
2151         free(url);
2152
2153         if (*symref != NULL)
2154                 free(*symref);
2155         *symref = NULL;
2156         memset(sha1, 0, 20);
2157
2158         if (buffer.posn == 0)
2159                 return;
2160
2161         /* If it's a symref, set the refname; otherwise try for a sha1 */
2162         if (!strncmp((char *)buffer.buffer, "ref: ", 5)) {
2163                 *symref = xcalloc(buffer.posn - 5, 1);
2164                 strncpy(*symref, (char *)buffer.buffer + 5, buffer.posn - 6);
2165         } else {
2166                 get_sha1_hex(buffer.buffer, sha1);
2167         }
2168
2169         free(buffer.buffer);
2170 }
2171
2172 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2173 {
2174         int pipe_fd[2];
2175         pid_t merge_base_pid;
2176         char line[PATH_MAX + 20];
2177         unsigned char merge_sha1[20];
2178         int verified = 0;
2179
2180         if (pipe(pipe_fd) < 0)
2181                 die("Verify merge base: pipe failed");
2182
2183         merge_base_pid = fork();
2184         if (!merge_base_pid) {
2185                 static const char *args[] = {
2186                         "merge-base",
2187                         "-a",
2188                         NULL,
2189                         NULL,
2190                         NULL
2191                 };
2192                 args[2] = strdup(sha1_to_hex(head_sha1));
2193                 args[3] = sha1_to_hex(branch_sha1);
2194
2195                 dup2(pipe_fd[1], 1);
2196                 close(pipe_fd[0]);
2197                 close(pipe_fd[1]);
2198                 execv_git_cmd(args);
2199                 die("merge-base setup failed");
2200         }
2201         if (merge_base_pid < 0)
2202                 die("merge-base fork failed");
2203
2204         dup2(pipe_fd[0], 0);
2205         close(pipe_fd[0]);
2206         close(pipe_fd[1]);
2207         while (fgets(line, sizeof(line), stdin) != NULL) {
2208                 if (get_sha1_hex(line, merge_sha1))
2209                         die("expected sha1, got garbage:\n %s", line);
2210                 if (!memcmp(branch_sha1, merge_sha1, 20)) {
2211                         verified = 1;
2212                         break;
2213                 }
2214         }
2215
2216         return verified;
2217 }
2218
2219 static int delete_remote_branch(char *pattern, int force)
2220 {
2221         struct ref *refs = remote_refs;
2222         struct ref *remote_ref = NULL;
2223         unsigned char head_sha1[20];
2224         char *symref = NULL;
2225         int match;
2226         int patlen = strlen(pattern);
2227         int i;
2228         struct active_request_slot *slot;
2229         struct slot_results results;
2230         char *url;
2231
2232         /* Find the remote branch(es) matching the specified branch name */
2233         for (match = 0; refs; refs = refs->next) {
2234                 char *name = refs->name;
2235                 int namelen = strlen(name);
2236                 if (namelen < patlen ||
2237                     memcmp(name + namelen - patlen, pattern, patlen))
2238                         continue;
2239                 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2240                         continue;
2241                 match++;
2242                 remote_ref = refs;
2243         }
2244         if (match == 0)
2245                 return error("No remote branch matches %s", pattern);
2246         if (match != 1)
2247                 return error("More than one remote branch matches %s",
2248                              pattern);
2249
2250         /*
2251          * Remote HEAD must be a symref (not exactly foolproof; a remote
2252          * symlink to a symref will look like a symref)
2253          */
2254         fetch_symref("HEAD", &symref, head_sha1);
2255         if (!symref)
2256                 return error("Remote HEAD is not a symref");
2257
2258         /* Remote branch must not be the remote HEAD */
2259         for (i=0; symref && i<MAXDEPTH; i++) {
2260                 if (!strcmp(remote_ref->name, symref))
2261                         return error("Remote branch %s is the current HEAD",
2262                                      remote_ref->name);
2263                 fetch_symref(symref, &symref, head_sha1);
2264         }
2265
2266         /* Run extra sanity checks if delete is not forced */
2267         if (!force) {
2268                 /* Remote HEAD must resolve to a known object */
2269                 if (symref)
2270                         return error("Remote HEAD symrefs too deep");
2271                 if (is_zero_sha1(head_sha1))
2272                         return error("Unable to resolve remote HEAD");
2273                 if (!has_sha1_file(head_sha1))
2274                         return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2275
2276                 /* Remote branch must resolve to a known object */
2277                 if (is_zero_sha1(remote_ref->old_sha1))
2278                         return error("Unable to resolve remote branch %s",
2279                                      remote_ref->name);
2280                 if (!has_sha1_file(remote_ref->old_sha1))
2281                         return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
2282
2283                 /* Remote branch must be an ancestor of remote HEAD */
2284                 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2285                         return error("The branch '%s' is not a strict subset of your current HEAD.\nIf you are sure you want to delete it, run:\n\t'git http-push -D %s %s'", remote_ref->name, remote->url, pattern);
2286                 }
2287         }
2288
2289         /* Send delete request */
2290         fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2291         url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2292         sprintf(url, "%s%s", remote->url, remote_ref->name);
2293         slot = get_active_slot();
2294         slot->results = &results;
2295         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2296         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2297         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2298         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2299         if (start_active_slot(slot)) {
2300                 run_active_slot(slot);
2301                 free(url);
2302                 if (results.curl_result != CURLE_OK)
2303                         return error("DELETE request failed (%d/%ld)\n",
2304                                      results.curl_result, results.http_code);
2305         } else {
2306                 free(url);
2307                 return error("Unable to start DELETE request");
2308         }
2309
2310         return 0;
2311 }
2312
2313 int main(int argc, char **argv)
2314 {
2315         struct transfer_request *request;
2316         struct transfer_request *next_request;
2317         int nr_refspec = 0;
2318         char **refspec = NULL;
2319         struct remote_lock *ref_lock = NULL;
2320         struct remote_lock *info_ref_lock = NULL;
2321         struct rev_info revs;
2322         int delete_branch = 0;
2323         int force_delete = 0;
2324         int objects_to_send;
2325         int rc = 0;
2326         int i;
2327         int new_refs;
2328         struct ref *ref;
2329
2330         setup_git_directory();
2331         setup_ident();
2332
2333         remote = xcalloc(sizeof(*remote), 1);
2334
2335         argv++;
2336         for (i = 1; i < argc; i++, argv++) {
2337                 char *arg = *argv;
2338
2339                 if (*arg == '-') {
2340                         if (!strcmp(arg, "--all")) {
2341                                 push_all = 1;
2342                                 continue;
2343                         }
2344                         if (!strcmp(arg, "--force")) {
2345                                 force_all = 1;
2346                                 continue;
2347                         }
2348                         if (!strcmp(arg, "--verbose")) {
2349                                 push_verbosely = 1;
2350                                 continue;
2351                         }
2352                         if (!strcmp(arg, "-d")) {
2353                                 delete_branch = 1;
2354                                 continue;
2355                         }
2356                         if (!strcmp(arg, "-D")) {
2357                                 delete_branch = 1;
2358                                 force_delete = 1;
2359                                 continue;
2360                         }
2361                 }
2362                 if (!remote->url) {
2363                         char *path = strstr(arg, "//");
2364                         remote->url = arg;
2365                         if (path) {
2366                                 path = strchr(path+2, '/');
2367                                 if (path)
2368                                         remote->path_len = strlen(path);
2369                         }
2370                         continue;
2371                 }
2372                 refspec = argv;
2373                 nr_refspec = argc - i;
2374                 break;
2375         }
2376
2377         if (!remote->url)
2378                 usage(http_push_usage);
2379
2380         if (delete_branch && nr_refspec != 1)
2381                 die("You must specify only one branch name when deleting a remote branch");
2382
2383         memset(remote_dir_exists, -1, 256);
2384
2385         http_init();
2386
2387         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2388         default_headers = curl_slist_append(default_headers, "Range:");
2389         default_headers = curl_slist_append(default_headers, "Destination:");
2390         default_headers = curl_slist_append(default_headers, "If:");
2391         default_headers = curl_slist_append(default_headers,
2392                                             "Pragma: no-cache");
2393
2394         /* Verify DAV compliance/lock support */
2395         if (!locking_available()) {
2396                 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2397                 rc = 1;
2398                 goto cleanup;
2399         }
2400
2401         /* Check whether the remote has server info files */
2402         remote->can_update_info_refs = 0;
2403         remote->has_info_refs = remote_exists("info/refs");
2404         remote->has_info_packs = remote_exists("objects/info/packs");
2405         if (remote->has_info_refs) {
2406                 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2407                 if (info_ref_lock)
2408                         remote->can_update_info_refs = 1;
2409         }
2410         if (remote->has_info_packs)
2411                 fetch_indices();
2412
2413         /* Get a list of all local and remote heads to validate refspecs */
2414         get_local_heads();
2415         fprintf(stderr, "Fetching remote heads...\n");
2416         get_dav_remote_heads();
2417
2418         /* Remove a remote branch if -d or -D was specified */
2419         if (delete_branch) {
2420                 if (delete_remote_branch(refspec[0], force_delete) == -1)
2421                         fprintf(stderr, "Unable to delete remote branch %s\n",
2422                                 refspec[0]);
2423                 goto cleanup;
2424         }
2425
2426         /* match them up */
2427         if (!remote_tail)
2428                 remote_tail = &remote_refs;
2429         if (match_refs(local_refs, remote_refs, &remote_tail,
2430                        nr_refspec, refspec, push_all))
2431                 return -1;
2432         if (!remote_refs) {
2433                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2434                 return 0;
2435         }
2436
2437         new_refs = 0;
2438         for (ref = remote_refs; ref; ref = ref->next) {
2439                 char old_hex[60], *new_hex;
2440                 const char *commit_argv[4];
2441                 int commit_argc;
2442                 char *new_sha1_hex, *old_sha1_hex;
2443
2444                 if (!ref->peer_ref)
2445                         continue;
2446                 if (!memcmp(ref->old_sha1, ref->peer_ref->new_sha1, 20)) {
2447                         if (push_verbosely || 1)
2448                                 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2449                         continue;
2450                 }
2451
2452                 if (!force_all &&
2453                     !is_zero_sha1(ref->old_sha1) &&
2454                     !ref->force) {
2455                         if (!has_sha1_file(ref->old_sha1) ||
2456                             !ref_newer(ref->peer_ref->new_sha1,
2457                                        ref->old_sha1)) {
2458                                 /* We do not have the remote ref, or
2459                                  * we know that the remote ref is not
2460                                  * an ancestor of what we are trying to
2461                                  * push.  Either way this can be losing
2462                                  * commits at the remote end and likely
2463                                  * we were not up to date to begin with.
2464                                  */
2465                                 error("remote '%s' is not a strict "
2466                                       "subset of local ref '%s'. "
2467                                       "maybe you are not up-to-date and "
2468                                       "need to pull first?",
2469                                       ref->name,
2470                                       ref->peer_ref->name);
2471                                 rc = -2;
2472                                 continue;
2473                         }
2474                 }
2475                 memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
2476                 if (is_zero_sha1(ref->new_sha1)) {
2477                         error("cannot happen anymore");
2478                         rc = -3;
2479                         continue;
2480                 }
2481                 new_refs++;
2482                 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2483                 new_hex = sha1_to_hex(ref->new_sha1);
2484
2485                 fprintf(stderr, "updating '%s'", ref->name);
2486                 if (strcmp(ref->name, ref->peer_ref->name))
2487                         fprintf(stderr, " using '%s'", ref->peer_ref->name);
2488                 fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
2489
2490
2491                 /* Lock remote branch ref */
2492                 ref_lock = lock_remote(ref->name, LOCK_TIME);
2493                 if (ref_lock == NULL) {
2494                         fprintf(stderr, "Unable to lock remote branch %s\n",
2495                                 ref->name);
2496                         rc = 1;
2497                         continue;
2498                 }
2499
2500                 /* Set up revision info for this refspec */
2501                 commit_argc = 3;
2502                 new_sha1_hex = strdup(sha1_to_hex(ref->new_sha1));
2503                 old_sha1_hex = NULL;
2504                 commit_argv[1] = "--objects";
2505                 commit_argv[2] = new_sha1_hex;
2506                 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2507                         old_sha1_hex = xmalloc(42);
2508                         sprintf(old_sha1_hex, "^%s",
2509                                 sha1_to_hex(ref->old_sha1));
2510                         commit_argv[3] = old_sha1_hex;
2511                         commit_argc++;
2512                 }
2513                 init_revisions(&revs);
2514                 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2515                 free(new_sha1_hex);
2516                 if (old_sha1_hex) {
2517                         free(old_sha1_hex);
2518                         commit_argv[1] = NULL;
2519                 }
2520
2521                 /* Generate a list of objects that need to be pushed */
2522                 pushing = 0;
2523                 prepare_revision_walk(&revs);
2524                 mark_edges_uninteresting(revs.commits);
2525                 objects_to_send = get_delta(&revs, ref_lock);
2526                 finish_all_active_slots();
2527
2528                 /* Push missing objects to remote, this would be a
2529                    convenient time to pack them first if appropriate. */
2530                 pushing = 1;
2531                 if (objects_to_send)
2532                         fprintf(stderr, "    sending %d objects\n",
2533                                 objects_to_send);
2534 #ifdef USE_CURL_MULTI
2535                 fill_active_slots();
2536 #endif
2537                 finish_all_active_slots();
2538
2539                 /* Update the remote branch if all went well */
2540                 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2541                         rc = 1;
2542                         goto unlock;
2543                 }
2544
2545         unlock:
2546                 if (!rc)
2547                         fprintf(stderr, "    done\n");
2548                 unlock_remote(ref_lock);
2549                 check_locks();
2550         }
2551
2552         /* Update remote server info if appropriate */
2553         if (remote->has_info_refs && new_refs) {
2554                 if (info_ref_lock && remote->can_update_info_refs) {
2555                         fprintf(stderr, "Updating remote server info\n");
2556                         update_remote_info_refs(info_ref_lock);
2557                 } else {
2558                         fprintf(stderr, "Unable to update server info\n");
2559                 }
2560         }
2561         if (info_ref_lock)
2562                 unlock_remote(info_ref_lock);
2563
2564  cleanup:
2565         free(remote);
2566
2567         curl_slist_free_all(no_pragma_header);
2568         curl_slist_free_all(default_headers);
2569
2570         http_cleanup();
2571
2572         request = request_queue_head;
2573         while (request != NULL) {
2574                 next_request = request->next;
2575                 release_request(request);
2576                 request = next_request;
2577         }
2578
2579         return rc;
2580 }