third-party libs

third-party/curl-7.21.4/docs/examples/ftpget.c

@@ -0,0 +1,84 @@
+/*****************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ */
+
+#include <stdio.h>
+
+#include <curl/curl.h>
+#include <curl/types.h>
+#include <curl/easy.h>
+
+/*
+ * This is an example showing how to get a single file from an FTP server.
+ * It delays the actual destination file creation until the first write
+ * callback so that it won't create an empty file in case the remote file
+ * doesn't exist or something else fails.
+ */
+
+struct FtpFile {
+  const char *filename;
+  FILE *stream;
+};
+
+static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream)
+{
+  struct FtpFile *out=(struct FtpFile *)stream;
+  if(out && !out->stream) {
+    /* open file for writing */
+    out->stream=fopen(out->filename, "wb");
+    if(!out->stream)
+      return -1; /* failure, can't open file to write */
+  }
+  return fwrite(buffer, size, nmemb, out->stream);
+}
+
+
+int main(void)
+{
+  CURL *curl;
+  CURLcode res;
+  struct FtpFile ftpfile={
+    "curl.tar.gz", /* name to store the file as if succesful */
+    NULL
+  };
+
+  curl_global_init(CURL_GLOBAL_DEFAULT);
+
+  curl = curl_easy_init();
+  if(curl) {
+    /*
+     * You better replace the URL with one that works!
+     */
+    curl_easy_setopt(curl, CURLOPT_URL,
+                     "ftp://ftp.example.com/pub/www/utilities/curl/curl-7.9.2.tar.gz");
+    /* Define our callback to get called when there's data to be written */
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
+    /* Set a pointer to our struct to pass to the callback */
+    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
+
+    /* Switch on full protocol/debug output */
+    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+
+    res = curl_easy_perform(curl);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+
+    if(CURLE_OK != res) {
+      /* we failed */
+      fprintf(stderr, "curl told us %d\n", res);
+    }
+  }
+
+  if(ftpfile.stream)
+    fclose(ftpfile.stream); /* close the local file */
+
+  curl_global_cleanup();
+
+  return 0;
+}