// SuperTux
-// Copyright (C) 2014 Ingo Ruhnke <grumbel@gmail.com>
+// Copyright (C) 2007 Christoph Sommer <christoph.sommer@2007.expires.deltadevelopment.de>
+// 2014 Ingo Ruhnke <grumbel@gmail.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
#include "addon/downloader.hpp"
-#include <curl/curl.h>
-#include <curl/easy.h>
-#include <physfs.h>
+#include <algorithm>
+#include <array>
+#include <assert.h>
#include <memory>
+#include <physfs.h>
+#include <sstream>
#include <stdexcept>
#include "util/log.hpp"
} // namespace
-Downloader::Downloader()
+void
+TransferStatus::abort()
+{
+ m_downloader.abort(id);
+}
+
+void
+TransferStatus::update()
+{
+ m_downloader.update();
+}
+
+class Transfer
+{
+private:
+ Downloader& m_downloader;
+ TransferId m_id;
+
+ std::string m_url;
+ CURL* m_handle;
+ std::array<char, CURL_ERROR_SIZE> m_error_buffer;
+
+ TransferStatusPtr m_status;
+ std::unique_ptr<PHYSFS_file, int(*)(PHYSFS_File*)> m_fout;
+
+public:
+ Transfer(Downloader& downloader, TransferId id,
+ const std::string& url,
+ const std::string& outfile) :
+ m_downloader(downloader),
+ m_id(id),
+ m_url(url),
+ m_handle(),
+ m_error_buffer({{'\0'}}),
+ m_status(new TransferStatus(m_downloader, id)),
+ m_fout(PHYSFS_openWrite(outfile.c_str()), PHYSFS_close)
+ {
+ if (!m_fout)
+ {
+ std::ostringstream out;
+ out << "PHYSFS_openRead() failed: " << PHYSFS_getLastError();
+ throw std::runtime_error(out.str());
+ }
+
+ m_handle = curl_easy_init();
+ if (!m_handle)
+ {
+ throw std::runtime_error("curl_easy_init() failed");
+ }
+ else
+ {
+ curl_easy_setopt(m_handle, CURLOPT_URL, url.c_str());
+ curl_easy_setopt(m_handle, CURLOPT_USERAGENT, "SuperTux/" PACKAGE_VERSION " libcURL");
+
+ curl_easy_setopt(m_handle, CURLOPT_WRITEDATA, this);
+ curl_easy_setopt(m_handle, CURLOPT_WRITEFUNCTION, &Transfer::on_data_wrap);
+
+ curl_easy_setopt(m_handle, CURLOPT_ERRORBUFFER, m_error_buffer.data());
+ curl_easy_setopt(m_handle, CURLOPT_NOSIGNAL, 1);
+ curl_easy_setopt(m_handle, CURLOPT_FAILONERROR, 1);
+ curl_easy_setopt(m_handle, CURLOPT_FOLLOWLOCATION, 1);
+
+ curl_easy_setopt(m_handle, CURLOPT_NOPROGRESS, 0);
+ curl_easy_setopt(m_handle, CURLOPT_PROGRESSDATA, this);
+ curl_easy_setopt(m_handle, CURLOPT_PROGRESSFUNCTION, &Transfer::on_progress_wrap);
+ }
+ }
+
+ ~Transfer()
+ {
+ curl_easy_cleanup(m_handle);
+ }
+
+ TransferStatusPtr get_status() const
+ {
+ return m_status;
+ }
+
+ const char* get_error_buffer() const
+ {
+ return m_error_buffer.data();
+ }
+
+ TransferId get_id() const
+ {
+ return m_id;
+ }
+
+ CURL* get_curl_handle() const
+ {
+ return m_handle;
+ }
+
+ std::string get_url() const
+ {
+ return m_url;
+ }
+
+ size_t on_data(void* ptr, size_t size, size_t nmemb)
+ {
+ PHYSFS_write(m_fout.get(), ptr, size, nmemb);
+ return size * nmemb;
+ }
+
+ int on_progress(double dltotal, double dlnow,
+ double ultotal, double ulnow)
+ {
+ m_status->dltotal = static_cast<int>(dltotal);
+ m_status->dlnow = static_cast<int>(dlnow);
+
+ m_status->ultotal = static_cast<int>(ultotal);
+ m_status->ulnow = static_cast<int>(ulnow);
+
+ return 0;
+ }
+
+private:
+ static size_t on_data_wrap(char* ptr, size_t size, size_t nmemb, void* userdata)
+ {
+ return static_cast<Transfer*>(userdata)->on_data(ptr, size, nmemb);
+ }
+
+ static int on_progress_wrap(void* userdata,
+ double dltotal, double dlnow,
+ double ultotal, double ulnow)
+ {
+ return static_cast<Transfer*>(userdata)->on_progress(dltotal, dlnow, ultotal, ulnow);
+ }
+
+private:
+ Transfer(const Transfer&) = delete;
+ Transfer& operator=(const Transfer&) = delete;
+};
+
+Downloader::Downloader() :
+ m_multi_handle(),
+ m_transfers(),
+ m_next_transfer_id(1)
{
curl_global_init(CURL_GLOBAL_ALL);
+ m_multi_handle = curl_multi_init();
+ if (!m_multi_handle)
+ {
+ throw std::runtime_error("curl_multi_init() failed");
+ }
}
Downloader::~Downloader()
{
+ for(auto& transfer : m_transfers)
+ {
+ curl_multi_remove_handle(m_multi_handle, transfer->get_curl_handle());
+ }
+ m_transfers.clear();
+
+ curl_multi_cleanup(m_multi_handle);
curl_global_cleanup();
}
size_t (*write_func)(void* ptr, size_t size, size_t nmemb, void* userdata),
void* userdata)
{
+ log_info << "Downloading " << url << std::endl;
+
char error_buffer[CURL_ERROR_SIZE+1];
CURL* curl_handle = curl_easy_init();
void
Downloader::download(const std::string& url, const std::string& filename)
{
+ log_info << "download: " << url << " to " << filename << std::endl;
std::unique_ptr<PHYSFS_file, int(*)(PHYSFS_File*)> fout(PHYSFS_openWrite(filename.c_str()),
PHYSFS_close);
download(url, my_curl_physfs_write, fout.get());
}
+void
+Downloader::abort(TransferId id)
+{
+ auto it = std::find_if(m_transfers.begin(), m_transfers.end(),
+ [&id](const std::unique_ptr<Transfer>& rhs)
+ {
+ return id == rhs->get_id();
+ });
+ if (it == m_transfers.end())
+ {
+ log_warning << "transfer not found: " << id << std::endl;
+ }
+ else
+ {
+ TransferStatusPtr status = (*it)->get_status();
+
+ curl_multi_remove_handle(m_multi_handle, (*it)->get_curl_handle());
+ m_transfers.erase(it);
+
+ for(auto& callback : status->callbacks)
+ {
+ try
+ {
+ callback(false);
+ }
+ catch(const std::exception& err)
+ {
+ log_warning << "Illegal exception in Downloader: " << err.what() << std::endl;
+ }
+ }
+ }
+}
+
+void
+Downloader::update()
+{
+ // read data from the network
+ CURLMcode ret;
+ int running_handles;
+ while((ret = curl_multi_perform(m_multi_handle, &running_handles)) == CURLM_CALL_MULTI_PERFORM)
+ {
+ log_debug << "updating" << std::endl;
+ }
+
+ // check if any downloads got finished
+ int msgs_in_queue;
+ CURLMsg* msg;
+ while ((msg = curl_multi_info_read(m_multi_handle, &msgs_in_queue)))
+ {
+ switch(msg->msg)
+ {
+ case CURLMSG_DONE:
+ {
+ log_info << "Download completed with " << msg->data.result << std::endl;
+ curl_multi_remove_handle(m_multi_handle, msg->easy_handle);
+
+ auto it = std::find_if(m_transfers.begin(), m_transfers.end(),
+ [&msg](const std::unique_ptr<Transfer>& rhs) {
+ return rhs->get_curl_handle() == msg->easy_handle;
+ });
+ assert(it != m_transfers.end());
+ TransferStatusPtr status = (*it)->get_status();
+ status->error_msg = (*it)->get_error_buffer();
+ m_transfers.erase(it);
+
+ if (msg->data.result == CURLE_OK)
+ {
+ bool success = true;
+ for(auto& callback : status->callbacks)
+ {
+ try
+ {
+ callback(success);
+ }
+ catch(const std::exception& err)
+ {
+ success = false;
+ log_warning << "Exception in Downloader: " << err.what() << std::endl;
+ status->error_msg = err.what();
+ }
+ }
+ }
+ else
+ {
+ log_warning << "Error: " << curl_easy_strerror(msg->data.result) << std::endl;
+ for(auto& callback : status->callbacks)
+ {
+ try
+ {
+ callback(false);
+ }
+ catch(const std::exception& err)
+ {
+ log_warning << "Illegal exception in Downloader: " << err.what() << std::endl;
+ }
+ }
+ }
+ }
+ break;
+
+ default:
+ log_warning << "unhandled cURL message: " << msg->msg << std::endl;
+ break;
+ }
+ }
+}
+
+TransferStatusPtr
+Downloader::request_download(const std::string& url, const std::string& outfile)
+{
+ log_info << "request_download: " << url << std::endl;
+ std::unique_ptr<Transfer> transfer(new Transfer(*this, m_next_transfer_id++, url, outfile));
+ curl_multi_add_handle(m_multi_handle, transfer->get_curl_handle());
+ m_transfers.push_back(std::move(transfer));
+ return m_transfers.back()->get_status();
+}
+
/* EOF */
projects / supertux.git / blobdiff