On 2/18/2015 10:43 PM, Jon wrote:
>
> In the following simple code below, I get a CURLE_WRITE_ERROR (23) on
> the return of the CURL_EASY_PERFORM function. This looks like a
> serious error (error text = failed writing received data to
> disk/application) however the data successfully was sent and received
> by the URL.
>
> I have tested this on multiple occasions with the same error but yet
> things continue to work. Is this a documented benign error and/or can
> I ignore it? Or does it signal something more serious? Am I missing a
> setup call?
>
> Function call (please note that I took out a real phone # for this email):
>
> curl_out("phone=1234567890_at_txt.att.net&message=This is a test.",
> "testpage2");
>
>

Ok here, but I had to change the MessageBox line to this:
MessageBoxA(NULL, buff, "Error", MB_OK);
I would take serious consideration to your sprintf calls and review [1].

Here is what I get in debug builds 7.39 and latest dev x86 on Windows 7 x64:
---------------------------------------------------------------------------
* upload completely sent off: 52 out of 52 bytes
* STATE: DO => DO_DONE handle 0x3c8f70; line 1314 (connection #0)
* STATE: DO_DONE => WAITPERFORM handle 0x3c8f70; line 1441 (connection #0)
* STATE: WAITPERFORM => PERFORM handle 0x3c8f70; line 1454 (connection #0)
* HTTP 1.1 or later with persistent connection, pipelining supported
< HTTP/1.1 200 OK
< Date: Thu, 19 Feb 2015 19:16:06 GMT
* Server Apache is not blacklisted
< Server: Apache
< X-Powered-By: PHP/5.4.36
< Set-Cookie:
77d19e3ff79ff7b0c9990a8e6097383a=9b8bb9d0bd3abbfadb6fee49bcdd1176;
  path=/; HttpOnly
< Transfer-Encoding: chunked
< Content-Type: text/html; charset=utf-8
<
This is our PHP input (db) page<br />
<b>Fatal error</b>: Cannot re-assign auto-global variable _POST in
<b>/home/mob
ile45/public_html/www.keyonsec.com/phpincludes/phptest.php</b> on line
<b>3</b><
br />
* STATE: PERFORM => DONE handle 0x3c8f70; line 1626 (connection #0)
* Connection #0 to host www.keyonsec.com left intact
---------------------------------------------------------------------------

Same result if I loop it (ie it reuses the connection correctly). Add
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); If that doesn't help try
Wireshark. Maybe the server or something in between disconnects you.

If you need more help I would include all the information at [2] and it
would be helpful to have a self contained example. If you have that then
someone on here who shares your platform may help you and try it to see
if they can reproduce.

[1]:
https://www.securecoding.cert.org/confluence/display/seccode/STR31-C.+Guarantee+that+storage+for+strings+has+sufficient+space+for+character+data+and+the+null+terminator
[2]: http://curl.haxx.se/docs/bugs.html#What_to_report

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Received on 2015-02-19