Hi !
I'm kind of new to this mailing list, I hope I did post this message correctly
and in the right place.
I'm facing a strange issue with libcurl and I do not understand if this is a
"standard" behavior: I'm using libcurl to send multiple file to a web server on
an embedded system. This web server can unfortunately not handle multipart
requests. So I have to send each files one after the other. The files are
pretty light (~10k). The problem is that for each transfer, libcurls falls one
or two times in a select() timeout of 1000[ms]. Each files takes 2 seconds to
transfer... which is too much ofr our client.
On libcurl side, the select timeout is in select.c, in Curl_socket_ready()
function when the windows api select() function is called. Since we are
supporting windows XP on the client side, we can not use the macro
HAVE_POLL_FINE.
On our side, The code we use to send a file is the following (the cleanup of
the CURL handle is done in the destructor. The object "CurlWrapper" is
recreated for each transfer) :
int CurlWrapper::PushFile(
const YString& _sourcePath,
const YString& _URL,
const YString& _targetFileName,
bool* bCancelFlag)
{
m_formpost = NULL;
m_lastptr = NULL;
m_headerlist = NULL;
/* Fill in the file upload field */
curl_formadd(
&m_formpost,
&m_lastptr,
CURLFORM_COPYNAME, "sendfile",
CURLFORM_FILE, _sourcePath.c_str(),
CURLFORM_END );
/* Fill in the filename field */
curl_formadd(
&m_formpost,
&m_lastptr,
CURLFORM_COPYNAME, "filename",
CURLFORM_COPYCONTENTS, _targetFileName.c_str(),
CURLFORM_END );
/* Fill in the submit field too, even if this is rarely needed */
curl_formadd(
&m_formpost,
&m_lastptr,
CURLFORM_COPYNAME, "submit",
CURLFORM_COPYCONTENTS, "send",
CURLFORM_END );
CURLcode res = CURLE_INTERFACE_FAILED;
if ( m_curl_handle )
{
LOG_KMS_INFO( "CURL Handle successfully created" );
//Todo construct URL
curl_easy_setopt( m_curl_handle, CURLOPT_URL, _URL.c_str() );
curl_easy_setopt( m_curl_handle, CURLOPT_PORT, m_port );
curl_easy_setopt( m_curl_handle, CURLOPT_WRITEFUNCTION,
&LOGWriter );
curl_easy_setopt( m_curl_handle, CURLOPT_HTTPPOST, m_formpost );
curl_easy_setopt( m_curl_handle, CURLOPT_PROGRESSDATA,
bCancelFlag );
LOG_KMS_INFO( "Sending HTTP request" );
res = curl_easy_perform( m_curl_handle );
if ( res != 0 )
LOG_KMS_INFO( "HTTP request returned error %d.", res );
else
LOG_KMS_INFO( "Upload complete!" );
/* cleanup */
curl_formfree( m_formpost );
// curl_slist_free_all( headerlist );
}
else
{
LOG_KMS_INFO( "CURL Handle not created (Init error?)" );
}
return TranslateCurlError(res);
}
Has anyone already faced this issue ? Am I doing something completely wrong in
my code ?
Thanks in advance for the help,
Daniel Peppicelli
Software engineer
Switzerland
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