diff options
Diffstat (limited to 'plugins/FTPFileYM/curl/docs/examples/post-callback.c')
-rw-r--r-- | plugins/FTPFileYM/curl/docs/examples/post-callback.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/plugins/FTPFileYM/curl/docs/examples/post-callback.c b/plugins/FTPFileYM/curl/docs/examples/post-callback.c new file mode 100644 index 0000000000..3e1cfb0605 --- /dev/null +++ b/plugins/FTPFileYM/curl/docs/examples/post-callback.c @@ -0,0 +1,143 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at http://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ +/* An example source code that issues a HTTP POST and we provide the actual + * data through a read callback. + */ +#include <stdio.h> +#include <string.h> +#include <curl/curl.h> + +const char data[]="this is what we post to the silly web server"; + +struct WriteThis { + const char *readptr; + long sizeleft; +}; + +static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp) +{ + struct WriteThis *pooh = (struct WriteThis *)userp; + + if(size*nmemb < 1) + return 0; + + if(pooh->sizeleft) { + *(char *)ptr = pooh->readptr[0]; /* copy one single byte */ + pooh->readptr++; /* advance pointer */ + pooh->sizeleft--; /* less data left */ + return 1; /* we return 1 byte at a time! */ + } + + return 0; /* no more data left to deliver */ +} + +int main(void) +{ + CURL *curl; + CURLcode res; + + struct WriteThis pooh; + + pooh.readptr = data; + pooh.sizeleft = (long)strlen(data); + + /* In windows, this will init the winsock stuff */ + res = curl_global_init(CURL_GLOBAL_DEFAULT); + /* Check for errors */ + if(res != CURLE_OK) { + fprintf(stderr, "curl_global_init() failed: %s\n", + curl_easy_strerror(res)); + return 1; + } + + /* get a curl handle */ + curl = curl_easy_init(); + if(curl) { + /* First set the URL that is about to receive our POST. */ + curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/index.cgi"); + + /* Now specify we want to POST data */ + curl_easy_setopt(curl, CURLOPT_POST, 1L); + + /* we want to use our own read function */ + curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback); + + /* pointer to pass to our read function */ + curl_easy_setopt(curl, CURLOPT_READDATA, &pooh); + + /* get verbose debug output please */ + curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); + + /* + If you use POST to a HTTP 1.1 server, you can send data without knowing + the size before starting the POST if you use chunked encoding. You + enable this by adding a header like "Transfer-Encoding: chunked" with + CURLOPT_HTTPHEADER. With HTTP 1.0 or without chunked transfer, you must + specify the size in the request. + */ +#ifdef USE_CHUNKED + { + struct curl_slist *chunk = NULL; + + chunk = curl_slist_append(chunk, "Transfer-Encoding: chunked"); + res = curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk); + /* use curl_slist_free_all() after the *perform() call to free this + list again */ + } +#else + /* Set the expected POST size. If you want to POST large amounts of data, + consider CURLOPT_POSTFIELDSIZE_LARGE */ + curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, pooh.sizeleft); +#endif + +#ifdef DISABLE_EXPECT + /* + Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue" + header. You can disable this header with CURLOPT_HTTPHEADER as usual. + NOTE: if you want chunked transfer too, you need to combine these two + since you can only set one list of headers with CURLOPT_HTTPHEADER. */ + + /* A less good option would be to enforce HTTP 1.0, but that might also + have other implications. */ + { + struct curl_slist *chunk = NULL; + + chunk = curl_slist_append(chunk, "Expect:"); + res = curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk); + /* use curl_slist_free_all() after the *perform() call to free this + list again */ + } +#endif + + /* Perform the request, res will get the return code */ + res = curl_easy_perform(curl); + /* Check for errors */ + if(res != CURLE_OK) + fprintf(stderr, "curl_easy_perform() failed: %s\n", + curl_easy_strerror(res)); + + /* always cleanup */ + curl_easy_cleanup(curl); + } + curl_global_cleanup(); + return 0; +} |