Skip to content
Open
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
79 changes: 79 additions & 0 deletions src/rtFileDownloader.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,81 @@ static size_t ReadMemoryCallback(void *contents, size_t size, size_t nmemb, void
return 0;
}

static int SeekMemoryCallback(
void *userp,
curl_off_t offset,
int origin)
{
MemoryStruct *mem = (MemoryStruct *)userp;

size_t dataSize = mem->downloadRequest->readDataSize();
size_t newPos = 0;

switch (origin)
{
case SEEK_SET:
if (offset < 0)
return CURL_SEEKFUNC_CANTSEEK;

newPos = (size_t)offset;
break;

case SEEK_CUR:
{
long long pos =
(long long)mem->readSize +
(long long)offset;

if (pos < 0)
return CURL_SEEKFUNC_CANTSEEK;

newPos = (size_t)pos;
break;
}

case SEEK_END:
{
long long pos =
(long long)dataSize +
(long long)offset;

if (pos < 0)
return CURL_SEEKFUNC_CANTSEEK;

newPos = (size_t)pos;
break;
}

default:
return CURL_SEEKFUNC_CANTSEEK;
}

if (newPos > dataSize)
{
rtLogWarn(
"SeekMemoryCallback invalid seek: "
"origin=%d offset=%lld newPos=%zu dataSize=%zu",
origin,
(long long)offset,
newPos,
dataSize);

return CURL_SEEKFUNC_CANTSEEK;
}

rtLogWarn(
"SeekMemoryCallback: "
"origin=%d offset=%lld oldPos=%zu newPos=%zu dataSize=%zu",
origin,
(long long)offset,
mem->readSize,
newPos,
dataSize);

mem->readSize = newPos;

return CURL_SEEKFUNC_OK;
}

void startFileDownloadInBackground(void* data)
{
Expand Down Expand Up @@ -1123,6 +1198,8 @@ bool rtFileDownloader::downloadByteRangeFromNetwork(rtFileDownloadRequest* downl
chunk.downloadRequest = downloadRequest;
curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, ReadMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_READDATA, (void *)&chunk);
curl_easy_setopt(curl_handle, CURLOPT_SEEKFUNCTION, SeekMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_SEEKDATA, (void *)&chunk);
curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDSIZE, readDataSize);
}

Expand Down Expand Up @@ -1629,6 +1706,8 @@ bool rtFileDownloader::downloadFromNetwork(rtFileDownloadRequest* downloadReques
chunk.downloadRequest = downloadRequest;
curl_easy_setopt(curl_handle, CURLOPT_READFUNCTION, ReadMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_READDATA, (void *)&chunk);
curl_easy_setopt(curl_handle, CURLOPT_SEEKFUNCTION, SeekMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_SEEKDATA, (void *)&chunk);
curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDSIZE, readDataSize);
}

Expand Down
Loading