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Fix crash when libcurl calls read callback before calling socket callback.

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In days of usage this has never happened before, but apparently
it's possible. The solution chosen is to create the AIHTTPTimeout
object on the fly when it doesn't exist and let it be picked up
later when the CurlSocketInfo for the transfer is created.
This commit is contained in:
Aleric Inglewood
2012-10-22 00:44:19 +02:00
parent 937a60c8f9
commit c35bc71334
3 changed files with 36 additions and 9 deletions
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11
indra/aistatemachine/aicurlthread.cpp
View File

@@ -773,8 +773,7 @@ CurlSocketInfo::CurlSocketInfo(MultiHandle& multi_handle, CURL* easy, curl_socke
// CurlSocketInfo objects for a request and we need upload_finished() to be called on the HTTPTimeout
// object related to THIS CurlSocketInfo.
AICurlEasyRequest_wat easy_request_w(*lockobj);
mTimeout = new HTTPTimeout(easy_request_w->getTimeoutPolicy(), lockobj);
easy_request_w->set_timeout_object(mTimeout);
mTimeout = easy_request_w->get_timeout_object(lockobj);
}
CurlSocketInfo::~CurlSocketInfo()
@@ -2170,8 +2169,12 @@ size_t CurlResponderBuffer::curlReadCallback(char* data, size_t size, size_t nme
S32 bytes = size * nmemb; // The maximum amount to read.
AICurlResponderBuffer_wat buffer_w(*lockobj);
buffer_w->mLastRead = buffer_w->getInput()->readAfter(sChannels.out(), buffer_w->mLastRead, (U8*)data, bytes);
buffer_w->mRequestTransferedBytes += bytes; // Accumulate data sent to the server.
if (buffered_easy_request_w->httptimeout()->data_sent(bytes)) // Timeout administration.
buffer_w->mRequestTransferedBytes += bytes; // Accumulate data sent to the server.
// Timeout administration. Note that it can happen that we get here
// before the socket callback has been called, because the silly libcurl
// writes headers without informing us. In that case it's OK to create
// the Timeout object on the fly, so pass lockobj.
if (buffered_easy_request_w->httptimeout(lockobj)->data_sent(bytes))
{
// Transfer timed out. Return CURL_READFUNC_ABORT which will abort with error CURLE_ABORTED_BY_CALLBACK.
return CURL_READFUNC_ABORT;