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POUpload file using libcurl + POST and headers
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copied!<p>I am trying to upload a file to a webserver using libcurl (in C). The server requires that I use POST, not PUT (which is what CURLOPT_UPLOAD would use). I also need to send a specific token in the header. This is what I have so far:</p> <pre><code>int upload(char *filepath, char *filename, char *token) { CURL *curl; CURLcode res; FILE *fd; struct stat file_info; char *file; asprintf(&file, "%s/%s", filepath, filename); fd = fopen(file, "rb"); if (!fd) { fprintf(stderr, "Could not open file.\n"); return 1; } if (fstat(fileno(fd), &file_info) != 0) { fprintf(stderr, "Could not get file information.\n"); return 1; } curl = curl_easy_init() curl_easy_setopt(curl, CURLOPT_URL, "https://127.0.0.1/upload"); curl_easy_setopt(curl, CURLOPT_READDATA, fd); curl_easy_setopt(curl, CURLOPT_POST, 1L); struct curl_slist *headers = NULL; headers = curl_slist_append(headers, "Content-Type:application/octet-stream"); char *my_token = malloc(snprintf(NULL, 0, "X-Token:%s", token) + 1); sprintf(my_token, "X-Token:%s", token); headers = curl_slist_append(headers, my_token); curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers); curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); res = curl_easy_perform(curl); if (res != CURLE_OK) { fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res)); return 1; } fprintf(stdout, "Upload OK.\n"); return 0; } </code></pre> <p>The only response I get from the server is that it is a "400 Bad Request".</p> <p>I have written code in Python that performs the same action, and this file upload works:</p> <pre><code>import urllib, urllib2, json, os def upload(self, filepath, filename, token): # Open file f = open(os.path.join(filepath, filename), 'rb') filedata = f.read() f.close() request = urllib2.Request("https://127.0.0.1/upload" % filedata, {"Content-Type":"application/octet-stream", "X-Token":token}) res = self.opener.open(request) return json.loads(res.read()) </code></pre> <p>UPDATE: After running with verbose mode:</p> <pre><code>> POST /upload HTTP/1.1 Host: 127.0.0.1 Accept: */* Content-Type:application/octet-stream X-Token: 17f684-b98c Content-Length: -1 Expect: 100-continue < HTTP/1.1 Bad Request .... </code></pre>

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