Solved

How do you upload a file using Curl and HTTP using C++ on Linux?

Posted on 2007-04-05
5
2,508 Views
Last Modified: 2012-08-14
I want to upload an xml file,  using HTTP and Curl and C++. I am using libcurl on linux.  I have no trouble downloading using curl, but uploading always gives me a problem.  I get a segmentation fault whenever I call curl_easy_perform. Can somebody please post some sample code on how to upload a file to an http server. Thanks!!
0
Comment
Question by:mromeo
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 53

Expert Comment

by:Infinity08
ID: 18858014
What do you mean by uploading ? Do you mean POST the XML request to an HTTP server, and wait for the XML response ?

Can you show the coded that causes the segmentation fault ?
0
 

Author Comment

by:mromeo
ID: 18858217
No, I want to upload a file to a server.  I'll wait for a response saying it got the file.  Here is my code:

CURL *hCurl = NULL;
...
  CURLcode cc;
   if (!hCurl)
   {
      cc = curl_global_init(CURL_GLOBAL_ALL);
      hCurl = curl_easy_init();
   }

   if (hCurl)
   {
      FILE *fp = fopen("mbrTest.xml", "r");
      char error_buffer[1024];

      if (fp)
      {
         char *url = "http://1.0.0.2/cgi-bin/r50.cgi/ols-mbr.p";

         cc = curl_easy_setopt(hCurl, CURLOPT_URL, url);
         cc = curl_easy_setopt(hCurl, CURLOPT_UPLOAD, 1);
         cc = curl_easy_setopt(hCurl, CURLOPT_VERBOSE, 1);
         cc = curl_easy_setopt(hCurl, CURLOPT_INFILE, "mbrTest.xml");  
         cc = curl_easy_setopt(hCurl, CURLOPT_INFILESIZE, 104);  
         cc = curl_easy_setopt(hCurl, CURLOPT_ERRORBUFFER, &error_buffer);

         cc = curl_easy_perform(hCurl);
         printf("curl easy perform completed -- CURL code = %d\n", cc);

         fclose(fp);
      }

      curl_easy_cleanup(hCurl);
      curl_global_cleanup();
   }
0
 
LVL 53

Accepted Solution

by:
Infinity08 earned 500 total points
ID: 18858322
Did you take a look at this example (HTTP PUT) :

        http://curl.haxx.se/lxr/source/docs/examples/httpput.c
0
 
LVL 53

Assisted Solution

by:Infinity08
Infinity08 earned 500 total points
ID: 18858375
More precisely, try using :

      curl_easy_setopt(curl, CURLOPT_READDATA, fp);

instead of :

       cc = curl_easy_setopt(hCurl, CURLOPT_INFILE, "mbrTest.xml");



Also use :

       curl_easy_setopt(curl, CURLOPT_PUT, TRUE);

to choose HTTP PUT
0
 

Author Comment

by:mromeo
ID: 18858766
Both of those worked! Thanks!!
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article discusses four methods for overlaying images in a container on a web page
Finding original email is quite difficult due to their duplicates. From this article, you will come to know why multiple duplicates of same emails appear and how to delete duplicate emails from Outlook securely and instantly while vital emails remaiā€¦
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question