#9 Add CURLFORM_BUFFER and CURLFORM_BUFFERPTR support

[Kevin Ko]

This applies to pycurl 7.19.0 and adds support for libcurl's BUFFER and BUFFERPTR form parameters, which allow one to use a string as a POST parameter.

Example usage:
...
params = [
('x', (pycurl.FORM_BUFFER, "filename", pycurl.FORM_BUFFERPTR, "data"))
]
c = pycurl.Curl()
c.setopt(pycurl.HTTPPOST, params)
...

Excerpt from libcurl's API:

===
CURLFORM_BUFFERPTR

is used in combination with CURLFORM_BUFFER. The parameter is a pointer to the buffer to be uploaded. This buffer must not be freed until after curl_easy_cleanup(3) is called. You must also use CURLFORM_BUFFERLENGTH to set the number of bytes in the buffer.

CURLFORM_BUFFERLENGTH

is used in combination with CURLFORM_BUFFER. The parameter is a long which gives the length of the buffer.

Although the API docs say that the buffer should not be freed until curl_easy_cleanup() is called, I followed the liveness of CurlObject.httppost within pycurl.c, since the API makes identical assumptions.

Please direct comments to kevin.s.ko at gmail dot com.

[Kevin Ko]

Patch for pycurl-7.19.0 that adds FORM_BUFFER and FORM_BUFFERPTR parameters for the HTTPPOST option

[Kevin Ko]

Sorry, I should not have copied in CURLFORM_BUFFERLENGTH's description above, since that is handled internally. I meant to copy in CURLFORM_BUFFER:

CURLFORM_BUFFER

is used for custom file upload parts without use of CURLFORM_FILE. It tells libcurl that the file contents are already present in a buffer. The parameter is a string which provides the filename field in the content header.

[Christopher Warner]

I'll take a look at this patch a little later today or tomorrow

[Oleg Pudeyev]

Committed, thanks!