Hi,

I have write a simple program based on libcur, it simpley download data and write to a local file.
In most of the cases, it works fine, but some special case, it works differently from linux curl command.

The main part of my program looks like this:
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
62 CURL* handler = curl_easy_init();
65 int ret = CURLE_OK;
266 ret += curl_easy_setopt(handler, CURLOPT_ERRORBUFFER, errBuffer);
267 ret += curl_easy_setopt(handler, CURLOPT_VERBOSE, 1);
268 ret += curl_easy_setopt(handler, CURLOPT_URL, url);

270 ret += curl_easy_setopt(handler, CURLOPT_WRITEFUNCTION, write_image_data);
271 ret += curl_easy_setopt(handler, CURLOPT_WRITEDATA, imgData);

273 ret += curl_easy_perform(handler);
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////

In a special case, this url:
http://www.my7475.com/wp-content/uploads/2008/09/my747508093002.jpg
My program fails in getting image, the printed out message looks like this:
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
* About to connect() to www.my7475.com port 80
* Trying 119.57.53.145... * connected
* Connected to www.my7475.com (119.57.53.145) port 80
> GET /wp-content/uploads/2008/09/my747508093002.jpg HTTP/1.1
Host: www.my7475.com
Accept: */*

< HTTP/1.1 500 Internal Server Error
< Date: Tue, 14 Jun 2011 07:44:48 GMT
< Server: Apache/2.2.15 (Unix) PHP/5.2.13
< Content-Length: 535
< Connection: close
< Content-Type: text/html; charset=iso-8859-1
* Closing connection #0
download size: 535
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
I checked the downloaded content, it is just a text message telling me internal server error.
But if I use curl with default option and verbose mode, it download the image succesfully
and print out message like this:
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
* About to connect() to www.my7475.com port 80
* Trying 119.57.53.145... connected
* Connected to www.my7475.com (119.57.53.145) port 80
> GET /wp-content/uploads/2008/09/my747508093002.jpg HTTP/1.1
> User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
> Host: www.my7475.com
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Tue, 14 Jun 2011 07:46:22 GMT
< Server: Apache/2.2.15 (Unix) PHP/5.2.13
< Last-Modified: Fri, 19 Mar 2010 12:46:33 GMT
< ETag: "19689e6-5a17-48226bcb21c40"
< Accept-Ranges: bytes
< Content-Length: 23063
< Content-Type: image/jpeg
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 23063 100 23063 0 0 6216 0 0:00:03 0:00:03 --:--:-- 410kConnection #0 to host www.my7475.com left intact

* Closing connection #0
//////////////////////////////////////////////////////////////////////////////////////////////////////////////

From the above two verbose messages, it is really hard for me to figure out what is wrong.
Here is version information:
linux curl command:
curl 7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
libcur version:
31 #define LIBCURL_VERSION "7.15.5"

Can anybody help me? thanks.

Richard.

-------------------------------------------------------------------
List admin: http://cool.haxx.se/list/listinfo/curl-library
Etiquette: http://curl.haxx.se/mail/etiquette.html
Received on 2011-06-14