Revert "Update to 7.44.0"

[platform/upstream/curl.git] / docs / examples / getinmemory.c

diff --git a/docs/examples/getinmemory.c b/docs/examples/getinmemory.c
index 7d66291..1608ec5 100644 (file)
--- a/docs/examples/getinmemory.c
+++ b/docs/examples/getinmemory.c
@@ -1,84 +1,116 @@
-/*****************************************************************************
- *                                  _   _ ____  _     
- *  Project                     ___| | | |  _ \| |    
- *                             / __| | | | |_) | |    
- *                            | (__| |_| |  _ <| |___ 
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * $Id$
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
- * Example source code to show how the callback function can be used to
- * download data into a chunk of memory instead of storing it in a file.
+ * 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 exact source code has not been verified to work.
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+/* Example source code to show how the callback function can be used to
+ * download data into a chunk of memory instead of storing it in a file.
  */
 
-/* to make this work under windows, use the win32-functions from the
-   win32socket.c file as well */
-
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 #include <curl/curl.h>
-#include <curl/types.h>
-#include <curl/easy.h>
 
 struct MemoryStruct {
   char *memory;
   size_t size;
 };
 
-size_t
-WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *data)
+
+static size_t
+WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
 {
-  register int realsize = size * nmemb;
-  struct MemoryStruct *mem = (struct MemoryStruct *)data;
-  
-  mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
-  if (mem->memory) {
-    memcpy(&(mem->memory[mem->size]), ptr, realsize);
-    mem->size += realsize;
-    mem->memory[mem->size] = 0;
+  size_t realsize = size * nmemb;
+  struct MemoryStruct *mem = (struct MemoryStruct *)userp;
+
+  mem->memory = realloc(mem->memory, mem->size + realsize + 1);
+  if(mem->memory == NULL) {
+    /* out of memory! */
+    printf("not enough memory (realloc returned NULL)\n");
+    return 0;
   }
+
+  memcpy(&(mem->memory[mem->size]), contents, realsize);
+  mem->size += realsize;
+  mem->memory[mem->size] = 0;
+
   return realsize;
 }
 
-int main(int argc, char **argv)
+
+int main(void)
 {
   CURL *curl_handle;
+  CURLcode res;
 
   struct MemoryStruct chunk;
 
-  chunk.memory=NULL; /* we expect realloc(NULL, size) to work */
+  chunk.memory = malloc(1);  /* will be grown as needed by the realloc above */
   chunk.size = 0;    /* no data at this point */
 
+  curl_global_init(CURL_GLOBAL_ALL);
+
   /* init the curl session */
   curl_handle = curl_easy_init();
 
   /* specify URL to get */
-  curl_easy_setopt(curl_handle, CURLOPT_URL, "http://cool.haxx.se/");
+  curl_easy_setopt(curl_handle, CURLOPT_URL, "http://www.example.com/");
 
   /* send all data to this function  */
   curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
 
   /* we pass our 'chunk' struct to the callback function */
-  curl_easy_setopt(curl_handle, CURLOPT_FILE, (void *)&chunk);
+  curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
+
+  /* some servers don't like requests that are made without a user-agent
+     field, so we provide one */
+  curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
 
   /* get it! */
-  curl_easy_perform(curl_handle);
+  res = curl_easy_perform(curl_handle);
+
+  /* check for errors */
+  if(res != CURLE_OK) {
+    fprintf(stderr, "curl_easy_perform() failed: %s\n",
+            curl_easy_strerror(res));
+  }
+  else {
+    /*
+     * Now, our chunk.memory points to a memory block that is chunk.size
+     * bytes big and contains the remote file.
+     *
+     * Do something nice with it!
+     */
+
+    printf("%lu bytes retrieved\n", (long)chunk.size);
+  }
 
   /* cleanup curl stuff */
   curl_easy_cleanup(curl_handle);
 
-  /*
-   * Now, our chunk.memory points to a memory block that is chunk.size
-   * bytes big and contains the remote file.
-   *
-   * Do something nice with it!
-   *
-   * You should be aware of the fact that at this point we might have an
-   * allocated data block, and nothing has yet deallocated that data. So when
-   * you're done with it, you should free() it as a nice application.
-   */
+  if(chunk.memory)
+    free(chunk.memory);
+
+  /* we're done with libcurl, so clean it up */
+  curl_global_cleanup();
 
   return 0;
 }