Tillmann Steinbrecher
2006-07-26 18:03:07 UTC
Hi,
I have a very simple, basic problem; however despite reading of
documentation, mailing list archives, etc, I just can't find a solution.
What I'd like to do is simply POST binary data using libcurl, as a
normal multipart/formdata HTTP POST.
The problem that I have is that the data posted is truncated as soon as
the first zero byte occurs - as if strlen was being used; but DESPITE
the fact that I used CURLFORM_CONTENTSLENGTH in curl_formadd(). In fact,
the behaviour is very strange: It seems that libcurl either uses the
value provided after CURLFORM_CONTENTSLENGTH, OR the string length,
whichever is lower.
Example:
curl_formadd(&post, &last,
CURLFORM_COPYNAME, "mydata",
CURLFORM_PTRCONTENTS, "test\0test",
CURLFORM_CONTENTSLENGTH, 9,
CURLFORM_END);
-> 4 bytes are posted, but not 9
curl_formadd(&post, &last,
CURLFORM_COPYNAME, "mydata",
CURLFORM_PTRCONTENTS, "test\0test",
CURLFORM_CONTENTSLENGTH, 2,
CURLFORM_END);
-> 2 bytes are posted
Using CURLOPT_POSTFIELDSIZE doesn't seem to help either; as apparently
that option doesn't work with curl_formadd for creating rfc1867-style
(multipart) POSTs.
Any help would be greatly appreciated.
bye,
Till
I have a very simple, basic problem; however despite reading of
documentation, mailing list archives, etc, I just can't find a solution.
What I'd like to do is simply POST binary data using libcurl, as a
normal multipart/formdata HTTP POST.
The problem that I have is that the data posted is truncated as soon as
the first zero byte occurs - as if strlen was being used; but DESPITE
the fact that I used CURLFORM_CONTENTSLENGTH in curl_formadd(). In fact,
the behaviour is very strange: It seems that libcurl either uses the
value provided after CURLFORM_CONTENTSLENGTH, OR the string length,
whichever is lower.
Example:
curl_formadd(&post, &last,
CURLFORM_COPYNAME, "mydata",
CURLFORM_PTRCONTENTS, "test\0test",
CURLFORM_CONTENTSLENGTH, 9,
CURLFORM_END);
-> 4 bytes are posted, but not 9
curl_formadd(&post, &last,
CURLFORM_COPYNAME, "mydata",
CURLFORM_PTRCONTENTS, "test\0test",
CURLFORM_CONTENTSLENGTH, 2,
CURLFORM_END);
-> 2 bytes are posted
Using CURLOPT_POSTFIELDSIZE doesn't seem to help either; as apparently
that option doesn't work with curl_formadd for creating rfc1867-style
(multipart) POSTs.
Any help would be greatly appreciated.
bye,
Till
--
Dipl.-Ing. Tillmann Steinbrecher http://www.igd.fhg.de/~tsteinbr/
Cognitive Computing & Medical Imaging Phone: +49 6151 155-485
Fraunhofer IGD, Fraunhoferstr. 5, D-64283 Darmstadt, Germany
Dipl.-Ing. Tillmann Steinbrecher http://www.igd.fhg.de/~tsteinbr/
Cognitive Computing & Medical Imaging Phone: +49 6151 155-485
Fraunhofer IGD, Fraunhoferstr. 5, D-64283 Darmstadt, Germany