[librest] Add example for twitter image upload

[Ross Burton <rburton src gnome org>]

commit 3a60542a454eeb98ae025bad960fefefc94ca416
Author: Timm Bäder <baedert gmail com>
Date:   Fri Feb 8 22:52:38 2013 +0100

    Add example for twitter image upload
    
    The examples creates a new tweet and also uploads a simple image

 .gitignore                    |    1 +
 examples/Makefile.am          |    3 +-
 examples/post-twitter-media.c |  103 +++++++++++++++++++++++++++++++++++++++++
 examples/test-media.png       |  Bin 0 -> 2509 bytes
 4 files changed, 106 insertions(+), 1 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 9ef0111..ab00789 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,6 +47,7 @@ examples/get-fireeagle-location
 examples/get-flickr-favorites
 examples/lastfm-shout
 examples/post-twitter
+examples/post-twitter-media
 examples/test-raw
 examples/test-xml
 rest-extras/test-runner
diff --git a/examples/Makefile.am b/examples/Makefile.am
index a58a054..90aa89e 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,4 +1,4 @@
-noinst_PROGRAMS = test-raw test-xml dump-xml get-fireeagle-location post-twitter get-flickr-favorites 
lastfm-shout continuous-twitter
+noinst_PROGRAMS = test-raw test-xml dump-xml get-fireeagle-location post-twitter post-twitter-media 
get-flickr-favorites lastfm-shout continuous-twitter
 
 AM_CFLAGS = $(GLIB_CFLAGS) $(GTHREAD_CFLAGS) $(SOUP_CFLAGS) -I$(top_srcdir)
 AM_LDFLAGS = $(GLIB_LIBS) $(GTHREAD_LIBS) $(SOUP_LIBS) ../rest/librest- API_VERSION@.la 
../rest-extras/librest-extras- API_VERSION@.la
@@ -8,6 +8,7 @@ test_xml_SOURCES = test-xml.c
 get_fireeagle_location_SOURCES = get-fireeagle-location.c
 dump_xml_SOURCES = dump-xml.c
 post_twitter_SOURCES = post-twitter.c
+post_twitter_media_SOURCES = post-twitter-media.c
 get_flickr_favorites_SOURCES = get-flickr-favorites.c
 lastfm_shout_SOURCES = lastfm-shout.c
 continuous_twitter_SOURCES = continuous-twitter.c
diff --git a/examples/post-twitter-media.c b/examples/post-twitter-media.c
new file mode 100644
index 0000000..cfe118a
--- /dev/null
+++ b/examples/post-twitter-media.c
@@ -0,0 +1,103 @@
+/*
+ * librest - RESTful web services access
+ * Copyright (c) 2008, 2009, Intel Corporation.
+ *
+ * Authors: Rob Bradford <rob linux intel com>
+ *          Ross Burton <ross linux intel com>
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <rest/oauth-proxy.h>
+#include <stdio.h>
+
+
+int
+main (int argc, char **argv)
+{
+  RestProxy *proxy;
+  RestProxyCall *call;
+  RestParam *img_param;
+  GError *error = NULL;
+  char pin[256];
+
+  g_type_init ();
+
+  if (argc != 2) {
+    g_printerr ("$ post-twitter-media \"message\"\n");
+    return -1;
+  }
+
+  /* Create the proxy */
+  proxy = oauth_proxy_new ("UfXFxDbUjk41scg0kmkFwA",
+                           "pYQlfI2ZQ1zVK0f01dnfhFTWzizBGDnhNJIw6xwto",
+                           "https://api.twitter.com/";, FALSE);
+
+  /* First stage authentication, this gets a request token */
+  if (!oauth_proxy_request_token (OAUTH_PROXY (proxy), "oauth/request_token", "oob", &error))
+    g_error ("Cannot get request token: %s", error->message);
+
+  /* From the token construct a URL for the user to visit */
+  g_print ("Go to http://twitter.com/oauth/authorize?oauth_token=%s then enter the PIN\n",
+           oauth_proxy_get_token (OAUTH_PROXY (proxy)));
+
+
+  fgets (pin, sizeof(pin), stdin);
+  g_strchomp (pin);
+
+
+  /* Second stage authentication, this gets an access token */
+  if (!oauth_proxy_access_token (OAUTH_PROXY (proxy), "oauth/access_token", pin, &error))
+    g_error ("Cannot get access token: %s", error->message);
+
+  /* We're now authenticated */
+
+
+  /* In order to send an image to twitter, we first need to load it ourselves. */
+  gsize length;
+  gchar *contents;
+  if (!g_file_get_contents("test-media.png", &contents, &length, NULL)){
+    g_error("reading file failed.");
+    return -1;
+  }
+
+
+  /* Create the multipart/form-data parameter */
+  img_param = rest_param_new_full("media[]", REST_MEMORY_COPY, contents,
+                          length, "multipart/form-data", "test-media.png");
+
+
+  /* Post the status message */
+  call = rest_proxy_new_call (REST_PROXY(proxy));
+  rest_proxy_call_set_function (call, "1.1/statuses/update_with_media.json");
+  rest_proxy_call_set_method (call, "POST");
+  rest_proxy_call_add_param (call, "status", argv[1]);
+  rest_proxy_call_add_param_full(call, img_param);
+
+  if (!rest_proxy_call_sync (call, &error)) {
+    g_message("Return Code: %u", rest_proxy_call_get_status_code(call));
+    g_message("Payload: %s", rest_proxy_call_get_payload(call));
+    g_error ("Cannot make call: %s", error->message);
+ }
+
+  /* TODO: parse the XML and print something useful */
+  g_print ("%s\n", rest_proxy_call_get_payload (call));
+
+  g_object_unref (call);
+  g_object_unref (proxy);
+  g_free (contents);
+
+  return 0;
+}
diff --git a/examples/test-media.png b/examples/test-media.png
new file mode 100644
index 0000000..2dbbccc
Binary files /dev/null and b/examples/test-media.png differ