axmol/extensions/assets-manager/Downloader.cpp

735 lines
25 KiB
C++

/****************************************************************************
Copyright (c) 2013 cocos2d-x.org
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "Downloader.h"
#include "cocos2d.h"
#include <curl/curl.h>
#include <curl/easy.h>
#include <cstdio>
#include <cerrno>
NS_CC_EXT_BEGIN
#define LOW_SPEED_LIMIT 1L
#define LOW_SPEED_TIME 5L
#define MAX_REDIRS 2
#define DEFAULT_TIMEOUT 5
#define HTTP_CODE_SUPPORT_RESUME 206
#define MAX_WAIT_MSECS 30*1000 /* Wait max. 30 seconds */
#define TEMP_EXT ".temp"
size_t fileWriteFunc(void *ptr, size_t size, size_t nmemb, void *userdata)
{
FILE *fp = (FILE*)userdata;
size_t written = fwrite(ptr, size, nmemb, fp);
return written;
}
size_t bufferWriteFunc(void *ptr, size_t size, size_t nmemb, void *userdata)
{
Downloader::StreamData *streamBuffer = (Downloader::StreamData *)userdata;
size_t written = size * nmemb;
// Avoid pointer overflow
if (streamBuffer->offset + written <= static_cast<size_t>(streamBuffer->total))
{
memcpy(streamBuffer->buffer + streamBuffer->offset, ptr, written);
streamBuffer->offset += written;
return written;
}
else return 0;
}
// This is only for batchDownload process, will notify file succeed event in progress function
int batchDownloadProgressFunc(Downloader::ProgressData *ptr, double totalToDownload, double nowDownloaded, double totalToUpLoad, double nowUpLoaded)
{
if (ptr->totalToDownload == 0)
{
ptr->totalToDownload = totalToDownload;
}
if (ptr->downloaded != nowDownloaded)
{
ptr->downloaded = nowDownloaded;
Downloader::ProgressData data = *ptr;
if (nowDownloaded == totalToDownload)
{
Director::getInstance()->getScheduler()->performFunctionInCocosThread([=]{
if (!data.downloader.expired())
{
std::shared_ptr<Downloader> downloader = data.downloader.lock();
auto progressCB = downloader->getProgressCallback();
if (progressCB != nullptr)
{
progressCB(totalToDownload, nowDownloaded, data.url, data.customId);
}
auto successCB = downloader->getSuccessCallback();
if (successCB != nullptr)
{
successCB(data.url, data.path + data.name, data.customId);
}
}
});
}
else
{
Director::getInstance()->getScheduler()->performFunctionInCocosThread([=]{
if (!data.downloader.expired())
{
std::shared_ptr<Downloader> downloader = data.downloader.lock();
auto callback = downloader->getProgressCallback();
if (callback != nullptr)
{
callback(totalToDownload, nowDownloaded, data.url, data.customId);
}
}
});
}
}
return 0;
}
// Compare to batchDownloadProgressFunc, this only handles progress information notification
int downloadProgressFunc(Downloader::ProgressData *ptr, double totalToDownload, double nowDownloaded, double totalToUpLoad, double nowUpLoaded)
{
if (ptr->totalToDownload == 0)
{
ptr->totalToDownload = totalToDownload;
}
if (ptr->downloaded != nowDownloaded)
{
ptr->downloaded = nowDownloaded;
Downloader::ProgressData data = *ptr;
Director::getInstance()->getScheduler()->performFunctionInCocosThread([=]{
if (!data.downloader.expired())
{
std::shared_ptr<Downloader> downloader = data.downloader.lock();
auto callback = downloader->getProgressCallback();
if (callback != nullptr)
{
callback(totalToDownload, nowDownloaded, data.url, data.customId);
}
}
});
}
return 0;
}
Downloader::Downloader()
: _connectionTimeout(DEFAULT_TIMEOUT)
, _onError(nullptr)
, _onProgress(nullptr)
, _onSuccess(nullptr)
, _supportResuming(false)
{
_fileUtils = FileUtils::getInstance();
}
Downloader::~Downloader()
{
}
int Downloader::getConnectionTimeout()
{
return _connectionTimeout;
}
void Downloader::setConnectionTimeout(int timeout)
{
if (timeout >= 0)
_connectionTimeout = timeout;
}
void Downloader::notifyError(ErrorCode code, const std::string &msg/* ="" */, const std::string &customId/* ="" */, int curle_code/* = CURLE_OK*/, int curlm_code/* = CURLM_OK*/)
{
std::weak_ptr<Downloader> ptr = shared_from_this();
Director::getInstance()->getScheduler()->performFunctionInCocosThread([=]{
if (!ptr.expired())
{
std::shared_ptr<Downloader> downloader = ptr.lock();
if (downloader->_onError != nullptr)
{
Error err;
err.code = code;
err.curle_code = curle_code;
err.curlm_code = curlm_code;
err.message = msg;
err.customId = customId;
downloader->_onError(err);
}
}
});
}
void Downloader::notifyError(const std::string &msg, int curlm_code, const std::string &customId/* = ""*/)
{
notifyError(ErrorCode::CURL_MULTI_ERROR, msg, customId, CURLE_OK, curlm_code);
}
void Downloader::notifyError(const std::string &msg, const std::string &customId, int curle_code)
{
notifyError(ErrorCode::CURL_EASY_ERROR, msg, customId, curle_code);
}
std::string Downloader::getFileNameFromUrl(const std::string &srcUrl)
{
// Find file name and file extension
std::string filename;
unsigned long found = srcUrl.find_last_of("/\\");
if (found != std::string::npos)
filename = srcUrl.substr(found+1);
return filename;
}
void Downloader::clearBatchDownloadData()
{
while (_progDatas.size() != 0) {
delete _progDatas.back();
_progDatas.pop_back();
}
while (_files.size() != 0) {
delete _files.back();
_files.pop_back();
}
}
void Downloader::prepareDownload(const std::string &srcUrl, const std::string &storagePath, const std::string &customId, bool resumeDownload, FileDescriptor *fDesc, ProgressData *pData)
{
std::shared_ptr<Downloader> downloader = shared_from_this();
pData->customId = customId;
pData->url = srcUrl;
pData->downloader = downloader;
pData->downloaded = 0;
pData->totalToDownload = 0;
fDesc->fp = nullptr;
fDesc->curl = nullptr;
Error err;
err.customId = customId;
// Asserts
// Find file name and file extension
unsigned long found = storagePath.find_last_of("/\\");
if (found != std::string::npos)
{
pData->name = storagePath.substr(found+1);
pData->path = storagePath.substr(0, found+1);
}
else
{
err.code = ErrorCode::INVALID_URL;
err.message = "Invalid url or filename not exist error: " + srcUrl;
if (this->_onError) this->_onError(err);
return;
}
// Create a file to save file.
const std::string outFileName = storagePath + TEMP_EXT;
if (_supportResuming && resumeDownload && _fileUtils->isFileExist(outFileName))
{
fDesc->fp = fopen(FileUtils::getInstance()->getSuitableFOpen(outFileName).c_str(), "ab");
}
else
{
fDesc->fp = fopen(FileUtils::getInstance()->getSuitableFOpen(outFileName).c_str(), "wb");
}
if (!fDesc->fp)
{
err.code = ErrorCode::CREATE_FILE;
err.message = StringUtils::format("Can not create file %s: errno %d", outFileName.c_str(), errno);
if (this->_onError) this->_onError(err);
}
}
Downloader::HeaderInfo Downloader::prepareHeader(const std::string &srcUrl, void* header/* = nullptr */)
{
bool headerGiven = true;
HeaderInfo info;
info.valid = false;
if (!header)
{
headerGiven = false;
header = curl_easy_init();
}
curl_easy_setopt(header, CURLOPT_URL, srcUrl.c_str());
curl_easy_setopt(header, CURLOPT_HEADER, 1);
curl_easy_setopt(header, CURLOPT_NOBODY, 1);
curl_easy_setopt(header, CURLOPT_NOSIGNAL, 1);
if (curl_easy_perform(header) == CURLE_OK)
{
char *url;
char *contentType;
curl_easy_getinfo(header, CURLINFO_EFFECTIVE_URL, &url);
curl_easy_getinfo(header, CURLINFO_CONTENT_TYPE, &contentType);
curl_easy_getinfo(header, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &info.contentSize);
curl_easy_getinfo(header, CURLINFO_RESPONSE_CODE, &info.responseCode);
if (contentType == nullptr || info.contentSize == -1 || info.responseCode >= 400)
{
info.valid = false;
}
else
{
info.url = url;
info.contentType = contentType;
info.valid = true;
}
}
if (info.valid && _onHeader)
{
_onHeader(srcUrl, info);
}
else if (!info.valid)
{
info.contentSize = -1;
std::string msg = StringUtils::format("Can not get content size of file (%s) : Request header failed", srcUrl.c_str());
this->notifyError(ErrorCode::PREPARE_HEADER_ERROR, msg);
}
if (!headerGiven) {
curl_easy_cleanup(header);
}
return info;
}
long Downloader::getContentSize(const std::string &srcUrl)
{
HeaderInfo info = prepareHeader(srcUrl);
return info.contentSize;
}
Downloader::HeaderInfo Downloader::getHeader(const std::string &srcUrl)
{
return prepareHeader(srcUrl);
}
void Downloader::getHeaderAsync(const std::string &srcUrl, const HeaderCallback &callback)
{
setHeaderCallback(callback);
auto t = std::thread(&Downloader::prepareHeader, this, srcUrl, nullptr);
t.detach();
}
void Downloader::downloadToBufferAsync(const std::string &srcUrl, unsigned char *buffer, const long &size, const std::string &customId/* = ""*/)
{
if (buffer != nullptr)
{
std::shared_ptr<Downloader> downloader = shared_from_this();
ProgressData pData;
pData.customId = customId;
pData.url = srcUrl;
pData.downloader = downloader;
pData.downloaded = 0;
pData.totalToDownload = 0;
StreamData streamBuffer;
streamBuffer.buffer = buffer;
streamBuffer.total = size;
streamBuffer.offset = 0;
auto t = std::thread(&Downloader::downloadToBuffer, this, srcUrl, customId, streamBuffer, pData);
t.detach();
}
}
void Downloader::downloadToBufferSync(const std::string &srcUrl, unsigned char *buffer, const long &size, const std::string &customId/* = ""*/)
{
if (buffer != nullptr)
{
std::shared_ptr<Downloader> downloader = shared_from_this();
ProgressData pData;
pData.customId = customId;
pData.url = srcUrl;
pData.downloader = downloader;
pData.downloaded = 0;
pData.totalToDownload = 0;
StreamData streamBuffer;
streamBuffer.buffer = buffer;
streamBuffer.total = size;
streamBuffer.offset = 0;
downloadToBuffer(srcUrl, customId, streamBuffer, pData);
}
}
void Downloader::downloadToBuffer(const std::string &srcUrl, const std::string &customId, const StreamData &buffer, const ProgressData &data)
{
std::weak_ptr<Downloader> ptr = shared_from_this();
CURL *curl = curl_easy_init();
if (!curl)
{
this->notifyError(ErrorCode::CURL_EASY_ERROR, "Can not init curl with curl_easy_init", customId);
return;
}
// Download pacakge
curl_easy_setopt(curl, CURLOPT_URL, srcUrl.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, bufferWriteFunc);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, downloadProgressFunc);
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &data);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
if (_connectionTimeout) curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, _connectionTimeout);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, LOW_SPEED_LIMIT);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, LOW_SPEED_TIME);
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK)
{
std::string msg = StringUtils::format("Unable to download file to buffer: [curl error]%s", curl_easy_strerror(res));
this->notifyError(msg, customId, res);
}
else
{
Director::getInstance()->getScheduler()->performFunctionInCocosThread([=]{
if (!ptr.expired())
{
std::shared_ptr<Downloader> downloader = ptr.lock();
auto successCB = downloader->getSuccessCallback();
if (successCB != nullptr)
{
successCB(data.url, "", data.customId);
}
}
});
}
curl_easy_cleanup(curl);
}
void Downloader::downloadAsync(const std::string &srcUrl, const std::string &storagePath, const std::string &customId/* = ""*/)
{
FileDescriptor fDesc;
ProgressData pData;
prepareDownload(srcUrl, storagePath, customId, false, &fDesc, &pData);
if (fDesc.fp != NULL)
{
auto t = std::thread(&Downloader::download, this, srcUrl, customId, fDesc, pData);
t.detach();
}
}
void Downloader::downloadSync(const std::string &srcUrl, const std::string &storagePath, const std::string &customId/* = ""*/)
{
FileDescriptor fDesc;
ProgressData pData;
prepareDownload(srcUrl, storagePath, customId, false, &fDesc, &pData);
if (fDesc.fp != NULL)
{
download(srcUrl, customId, fDesc, pData);
}
}
void Downloader::download(const std::string &srcUrl, const std::string &customId, const FileDescriptor &fDesc, const ProgressData &data)
{
std::weak_ptr<Downloader> ptr = shared_from_this();
CURL *curl = curl_easy_init();
if (!curl)
{
this->notifyError(ErrorCode::CURL_EASY_ERROR, "Can not init curl with curl_easy_init", customId);
return;
}
// Download pacakge
curl_easy_setopt(curl, CURLOPT_URL, srcUrl.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fileWriteFunc);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fDesc.fp);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, downloadProgressFunc);
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &data);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
if (_connectionTimeout) curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, _connectionTimeout);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, LOW_SPEED_LIMIT);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, LOW_SPEED_TIME);
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK)
{
_fileUtils->removeFile(data.path + data.name + TEMP_EXT);
std::string msg = StringUtils::format("Unable to download file: [curl error]%s", curl_easy_strerror(res));
this->notifyError(msg, customId, res);
}
fclose(fDesc.fp);
curl_easy_cleanup(curl);
// This can only be done after fclose
if (res == CURLE_OK)
{
_fileUtils->renameFile(data.path, data.name + TEMP_EXT, data.name);
Director::getInstance()->getScheduler()->performFunctionInCocosThread([=]{
if (!ptr.expired())
{
std::shared_ptr<Downloader> downloader = ptr.lock();
auto successCB = downloader->getSuccessCallback();
if (successCB != nullptr)
{
successCB(data.url, data.path + data.name, data.customId);
}
}
});
}
}
void Downloader::batchDownloadAsync(const DownloadUnits &units, const std::string &batchId/* = ""*/)
{
auto t = std::thread(&Downloader::batchDownloadSync, this, units, batchId);
t.detach();
}
void Downloader::batchDownloadSync(const DownloadUnits &units, const std::string &batchId/* = ""*/)
{
// Make sure downloader won't be released
std::weak_ptr<Downloader> ptr = shared_from_this();
if (units.size() != 0)
{
// Test server download resuming support with the first unit
_supportResuming = false;
CURL *header = curl_easy_init();
// Make a resume request
curl_easy_setopt(header, CURLOPT_RESUME_FROM_LARGE, 0);
HeaderInfo headerInfo = prepareHeader(units.begin()->second.srcUrl, header);
if (headerInfo.valid)
{
if (headerInfo.responseCode == HTTP_CODE_SUPPORT_RESUME)
{
_supportResuming = true;
}
}
curl_easy_cleanup(header);
int count = 0;
DownloadUnits group;
for (auto it = units.cbegin(); it != units.cend(); ++it, ++count)
{
if (count == FOPEN_MAX)
{
groupBatchDownload(group);
group.clear();
count = 0;
}
const std::string &key = it->first;
const DownloadUnit &unit = it->second;
group.emplace(key, unit);
}
if (group.size() > 0)
{
groupBatchDownload(group);
}
}
Director::getInstance()->getScheduler()->performFunctionInCocosThread([ptr, batchId]{
if (!ptr.expired()) {
std::shared_ptr<Downloader> downloader = ptr.lock();
auto callback = downloader->getSuccessCallback();
if (callback != nullptr)
{
callback("", "", batchId);
}
}
});
_supportResuming = false;
}
void Downloader::groupBatchDownload(const DownloadUnits &units)
{
CURLM* multi_handle = curl_multi_init();
int still_running = 0;
for (auto it = units.cbegin(); it != units.cend(); ++it)
{
DownloadUnit unit = it->second;
std::string srcUrl = unit.srcUrl;
std::string storagePath = unit.storagePath;
std::string customId = unit.customId;
FileDescriptor *fDesc = new FileDescriptor();
ProgressData *data = new ProgressData();
prepareDownload(srcUrl, storagePath, customId, unit.resumeDownload, fDesc, data);
if (fDesc->fp != NULL)
{
CURL* curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, srcUrl.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fileWriteFunc);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fDesc->fp);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, batchDownloadProgressFunc);
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, data);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
if (_connectionTimeout) curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, _connectionTimeout);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, LOW_SPEED_LIMIT);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, LOW_SPEED_TIME);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true);
curl_easy_setopt(curl, CURLOPT_MAXREDIRS, MAX_REDIRS);
// Resuming download support
if (_supportResuming && unit.resumeDownload)
{
// Check already downloaded size for current download unit
long size = _fileUtils->getFileSize(storagePath + TEMP_EXT);
if (size != -1)
{
curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE, size);
}
}
fDesc->curl = curl;
CURLMcode code = curl_multi_add_handle(multi_handle, curl);
if (code != CURLM_OK)
{
// Avoid memory leak
fclose(fDesc->fp);
delete data;
delete fDesc;
std::string msg = StringUtils::format("Unable to add curl handler for %s: [curl error]%s", customId.c_str(), curl_multi_strerror(code));
this->notifyError(msg, code, customId);
}
else
{
// Add to list for tracking
_progDatas.push_back(data);
_files.push_back(fDesc);
}
}
}
// Query multi perform
CURLMcode curlm_code = CURLM_CALL_MULTI_PERFORM;
while(CURLM_CALL_MULTI_PERFORM == curlm_code) {
curlm_code = curl_multi_perform(multi_handle, &still_running);
}
if (curlm_code != CURLM_OK) {
std::string msg = StringUtils::format("Unable to continue the download process: [curl error]%s", curl_multi_strerror(curlm_code));
this->notifyError(msg, curlm_code);
}
else
{
bool failed = false;
while (still_running > 0 && !failed)
{
// set a suitable timeout to play around with
struct timeval select_tv;
long curl_timeo = -1;
select_tv.tv_sec = 1;
select_tv.tv_usec = 0;
curl_multi_timeout(multi_handle, &curl_timeo);
if(curl_timeo >= 0) {
select_tv.tv_sec = curl_timeo / 1000;
if(select_tv.tv_sec > 1)
select_tv.tv_sec = 1;
else
select_tv.tv_usec = (curl_timeo % 1000) * 1000;
}
int rc;
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
// FIXME: when jenkins migrate to ubuntu, we should remove this hack code
#if (CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &select_tv);
#else
rc = curl_multi_wait(multi_handle,nullptr, 0, MAX_WAIT_MSECS, &maxfd);
#endif
switch(rc)
{
case -1:
failed = true;
break;
case 0:
default:
curlm_code = CURLM_CALL_MULTI_PERFORM;
while(CURLM_CALL_MULTI_PERFORM == curlm_code) {
curlm_code = curl_multi_perform(multi_handle, &still_running);
}
if (curlm_code != CURLM_OK) {
std::string msg = StringUtils::format("Unable to continue the download process: [curl error]%s", curl_multi_strerror(curlm_code));
this->notifyError(msg, curlm_code);
}
break;
}
}
}
// Clean up and close files
for (auto it = _files.begin(); it != _files.end(); ++it)
{
FILE *f = (*it)->fp;
fclose(f);
auto single = (*it)->curl;
curl_multi_remove_handle(multi_handle, single);
curl_easy_cleanup(single);
}
curl_multi_cleanup(multi_handle);
// Check unfinished files and notify errors, succeed files will be renamed from temporary file name to real name
for (auto it = _progDatas.begin(); it != _progDatas.end(); ++it) {
ProgressData *data = *it;
if (data->downloaded < data->totalToDownload || data->totalToDownload == 0)
{
this->notifyError(ErrorCode::NETWORK, "Unable to download file", data->customId);
}
else
{
_fileUtils->renameFile(data->path, data->name + TEMP_EXT, data->name);
}
}
clearBatchDownloadData();
}
NS_CC_EXT_END