add curl 7.16.0 to in tree libs

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3744 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/curl/docs/examples/post-callback.c

@@ -0,0 +1,117 @@
+/*****************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * $Id: post-callback.c,v 1.5 2005/12/14 13:10:14 bagder Exp $
+ *
+ * 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>
+
+char data[]="this is what we post to the silly web server";
+
+struct WriteThis {
+  char *readptr;
+  int sizeleft;
+};
+
+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 -1;                         /* no more data left to deliver */
+}
+
+int main(void)
+{
+  CURL *curl;
+  CURLcode res;
+
+  struct WriteThis pooh;
+
+  pooh.readptr = data;
+  pooh.sizeleft = strlen(data);
+
+  curl = curl_easy_init();
+  if(curl) {
+    /* First set the URL that is about to receive our POST. */
+    curl_easy_setopt(curl, CURLOPT_URL,
+                     "http://receivingsite.com.pooh/index.cgi");
+    /* Now specify we want to POST data */
+    curl_easy_setopt(curl, CURLOPT_POST, TRUE);
+
+    /* 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, 1);
+
+    /*
+      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
+    {
+      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. */
+    {
+      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);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+  }
+  return 0;
+}