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[librest] Added Youtube proxy for uploading videos.

commit 37364525ace31d05626c081df50b401bb0ecb328
Author: Eitan Isaacson <eitan monotonous org>
Date:   Sun Mar 20 23:47:37 2011 -0700

    Added Youtube proxy for uploading videos.
    
    Fixes: BMC#14749

 rest-extras/Makefile.am             |    7 +-
 rest-extras/youtube-proxy-private.h |   31 +++
 rest-extras/youtube-proxy.c         |  381 +++++++++++++++++++++++++++++++++++
 rest-extras/youtube-proxy.h         |   91 +++++++++
 4 files changed, 508 insertions(+), 2 deletions(-)
---
diff --git a/rest-extras/Makefile.am b/rest-extras/Makefile.am
index 57b7cfc..2db330a 100644
--- a/rest-extras/Makefile.am
+++ b/rest-extras/Makefile.am
@@ -6,12 +6,15 @@ lib_sources = \
 		     flickr-proxy-private.h \
 		     lastfm-proxy.c	\
 		     lastfm-proxy-call.c	\
-		     lastfm-proxy-private.h
+		     lastfm-proxy-private.h \
+		     youtube-proxy.c \
+		     youtube-proxy-private.h
 lib_headers = \
 		     flickr-proxy.h	\
 		     flickr-proxy-call.h \
 		     lastfm-proxy.h	\
-		     lastfm-proxy-call.h
+		     lastfm-proxy-call.h \
+		     youtube-proxy.h
 
 
 lib_LTLIBRARIES = librest-extras- API_VERSION@.la
diff --git a/rest-extras/youtube-proxy-private.h b/rest-extras/youtube-proxy-private.h
new file mode 100644
index 0000000..83b7bc5
--- /dev/null
+++ b/rest-extras/youtube-proxy-private.h
@@ -0,0 +1,31 @@
+/*
+ * librest - RESTful web services access
+ * Copyright (c) 2011 Collabora Ltd.
+ *
+ * Authors: Eitan Isaacson <eitan isaacson collabora co uk>
+ * 
+ * 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 "youtube-proxy.h"
+
+#define YOUTUBE_PROXY_GET_PRIVATE(o) \
+  (G_TYPE_INSTANCE_GET_PRIVATE ((o), YOUTUBE_TYPE_PROXY, YoutubeProxyPrivate))
+
+struct _YoutubeProxyPrivate {
+  char *developer_key;
+  char *user_auth;
+};
+
diff --git a/rest-extras/youtube-proxy.c b/rest-extras/youtube-proxy.c
new file mode 100644
index 0000000..fc824a2
--- /dev/null
+++ b/rest-extras/youtube-proxy.c
@@ -0,0 +1,381 @@
+/*
+ * 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 <config.h>
+#include <stdlib.h>
+#include <string.h>
+#include <rest/rest-proxy.h>
+#include <rest/rest-xml-node.h>
+#include <libsoup/soup.h>
+
+#include "rest/rest-private.h"
+#include "youtube-proxy.h"
+#include "youtube-proxy-private.h"
+
+G_DEFINE_TYPE (YoutubeProxy, youtube_proxy, REST_TYPE_PROXY)
+
+#define UPLOAD_URL \
+  "http://uploads.gdata.youtube.com/feeds/api/users/default/uploads";
+
+enum {
+  PROP_0,
+  PROP_DEVELOPER_KEY,
+  PROP_USER_AUTH,
+};
+
+GQuark
+youtube_proxy_error_quark (void)
+{
+  return g_quark_from_static_string ("rest-youtube-proxy");
+}
+
+static void
+youtube_proxy_get_property (GObject *object, guint property_id,
+                              GValue *value, GParamSpec *pspec)
+{
+  YoutubeProxyPrivate *priv = YOUTUBE_PROXY_GET_PRIVATE (object);
+
+  switch (property_id) {
+  case PROP_DEVELOPER_KEY:
+    g_value_set_string (value, priv->developer_key);
+    break;
+  case PROP_USER_AUTH:
+    g_value_set_string (value, priv->user_auth);
+    break;
+  default:
+    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+  }
+}
+
+static void
+youtube_proxy_set_property (GObject *object, guint property_id,
+                           const GValue *value, GParamSpec *pspec)
+{
+  YoutubeProxyPrivate *priv = YOUTUBE_PROXY_GET_PRIVATE (object);
+
+  switch (property_id) {
+  case PROP_DEVELOPER_KEY:
+    g_free (priv->developer_key);
+    priv->developer_key = g_value_dup_string (value);
+    break;
+  case PROP_USER_AUTH:
+    g_free (priv->user_auth);
+    priv->user_auth = g_value_dup_string (value);
+    break;
+  default:
+    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+  }
+}
+
+static void
+youtube_proxy_finalize (GObject *object)
+{
+  YoutubeProxyPrivate *priv = YOUTUBE_PROXY_GET_PRIVATE (object);
+
+  g_free (priv->developer_key);
+  g_free (priv->user_auth);
+
+  G_OBJECT_CLASS (youtube_proxy_parent_class)->finalize (object);
+}
+
+static void
+youtube_proxy_class_init (YoutubeProxyClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GParamSpec *pspec;
+
+  g_type_class_add_private (klass, sizeof (YoutubeProxyPrivate));
+
+  object_class->get_property = youtube_proxy_get_property;
+  object_class->set_property = youtube_proxy_set_property;
+  object_class->finalize = youtube_proxy_finalize;
+
+  pspec = g_param_spec_string ("developer-key",  "developer-key",
+                               "The developer API key", NULL,
+                               G_PARAM_READWRITE|
+                               G_PARAM_CONSTRUCT_ONLY|
+                               G_PARAM_STATIC_STRINGS);
+  g_object_class_install_property (object_class,
+                                   PROP_DEVELOPER_KEY,
+                                   pspec);
+
+  pspec = g_param_spec_string ("user-auth",  "user-auth",
+                               "The ClientLogin token", NULL,
+                               G_PARAM_READWRITE|
+                               G_PARAM_STATIC_STRINGS);
+  g_object_class_install_property (object_class,
+                                   PROP_USER_AUTH,
+                                   pspec);
+}
+
+static void
+youtube_proxy_init (YoutubeProxy *self)
+{
+  self->priv = YOUTUBE_PROXY_GET_PRIVATE (self);
+}
+
+RestProxy *
+youtube_proxy_new (const char *developer_key)
+{
+  return youtube_proxy_new_with_auth (developer_key,
+                                      NULL);
+}
+
+RestProxy *
+youtube_proxy_new_with_auth (const char *developer_key,
+                            const char *user_auth)
+{
+  return g_object_new (YOUTUBE_TYPE_PROXY, 
+                       "developer-key", developer_key,
+                       "user-auth", user_auth,
+                       NULL);
+}
+
+static gchar *
+_construct_upload_atom_xml (GHashTable *fields)
+{
+  GHashTableIter iter;
+  gpointer key, value;
+  RestXmlNode *entry = rest_xml_node_add_child (NULL, "entry");
+  RestXmlNode *group = rest_xml_node_add_child (entry, "media:group");
+  gchar *bare_xml;
+  gchar *full_xml;
+
+  rest_xml_node_add_attr (entry, "xmlns", "http://www.w3.org/2005/Atom";);
+  rest_xml_node_add_attr (entry, "xmlns:media",
+                          "http://search.yahoo.com/mrss/";);
+  rest_xml_node_add_attr (entry, "xmlns:yt",
+                          "http://gdata.youtube.com/schemas/2007";);
+
+
+  g_hash_table_iter_init (&iter, fields);
+
+  while (g_hash_table_iter_next (&iter, &key, &value)) {
+    RestXmlNode *node;
+    gchar *tag_name;
+    const gchar* field_value = value;
+    const gchar* field_key = key;
+
+    tag_name = g_strdup_printf ("media:%s", field_key);
+
+    node = rest_xml_node_add_child (group, tag_name);
+
+    if (g_strcmp0 (field_key, "title") == 0 ||
+        g_strcmp0 (field_key, "description") == 0)
+      rest_xml_node_add_attr (node, "type", "plain");
+
+    if (g_strcmp0 (field_key, "category") == 0)
+      rest_xml_node_add_attr (node, "scheme", "http://gdata.youtube.com/";
+                              "schemas/2007/categories.cat");
+
+    rest_xml_node_set_content (node, field_value);
+  }
+
+  bare_xml = rest_xml_node_print (entry);
+  full_xml = g_strdup_printf ("<?xml version=\"1.0\"?>\n%s", bare_xml);
+
+  rest_xml_node_unref (entry);
+  g_free (bare_xml);
+
+  return full_xml;
+}
+
+static void
+_set_upload_headers (YoutubeProxy *self,
+                     SoupMessageHeaders *headers,
+                     const gchar *filename)
+{
+  YoutubeProxyPrivate *priv = self->priv;
+  gchar *user_auth_header;
+  gchar *devkey_header;
+  gchar *basename;
+  const gchar *user_agent;
+
+  /* Set the user agent, if one was set in the proxy */
+  user_agent = rest_proxy_get_user_agent (REST_PROXY (self));
+  if (user_agent)
+    soup_message_headers_append (headers, "User-Agent", user_agent);
+
+  user_auth_header = g_strdup_printf ("GoogleLogin auth=%s", priv->user_auth);
+  soup_message_headers_append (headers, "Authorization", user_auth_header);
+  devkey_header = g_strdup_printf ("key=%s", priv->developer_key);
+  soup_message_headers_append (headers, "X-GData-Key", devkey_header);
+  basename = g_path_get_basename (filename);
+  soup_message_headers_append (headers, "Slug", basename);
+
+  g_free (user_auth_header);
+  g_free (devkey_header);
+}
+
+typedef struct {
+  YoutubeProxy *proxy;
+  YoutubeProxyUploadCallback callback;
+  SoupMessage *message;
+  GObject *weak_object;
+  gpointer user_data;
+} YoutubeProxyUploadClosure;
+
+static void
+_upload_async_weak_notify_cb (gpointer *data,
+                              GObject  *dead_object)
+{
+  YoutubeProxyUploadClosure *closure = 
+    (YoutubeProxyUploadClosure *) data;
+
+  _rest_proxy_cancel_message (REST_PROXY (closure->proxy), closure->message);
+}
+
+static void
+_upload_async_closure_free (YoutubeProxyUploadClosure *closure)
+{
+  if (closure->weak_object != NULL)
+    g_object_weak_unref (closure->weak_object,
+                         (GWeakNotify) _upload_async_weak_notify_cb,
+                         closure);
+
+  g_object_unref (closure->proxy);
+
+  g_slice_free (YoutubeProxyUploadClosure, closure);
+}
+
+static YoutubeProxyUploadClosure *
+_upload_async_closure_new (YoutubeProxy *self,
+                           YoutubeProxyUploadCallback callback,
+                           SoupMessage *message,
+                           GObject *weak_object,
+                           gpointer user_data)
+{
+  YoutubeProxyUploadClosure *closure =
+    g_slice_new0 (YoutubeProxyUploadClosure);
+  
+  closure->proxy = g_object_ref (self);
+  closure->callback = callback;
+  closure->message = message;
+  closure->weak_object = weak_object;
+  closure->user_data = user_data;
+
+  if (weak_object != NULL)
+    g_object_weak_ref (weak_object,
+                       (GWeakNotify) _upload_async_weak_notify_cb,
+                       closure);
+  return closure;
+}
+
+static void
+_upload_completed_cb (SoupSession *session,
+                      SoupMessage *message,
+                      gpointer     user_data)
+{
+  YoutubeProxyUploadClosure *closure =
+    (YoutubeProxyUploadClosure *) user_data;
+  GError *error = NULL;
+
+  if (closure->callback == NULL)
+    return;
+
+  if (message->status_code < 200 || message->status_code >= 300)
+    error = g_error_new_literal (REST_PROXY_ERROR,
+                                 message->status_code,
+                                 message->reason_phrase);
+
+  closure->callback (closure->proxy, message->response_body->data, error,
+                     closure->weak_object, closure->user_data);
+
+  _upload_async_closure_free (closure);
+}
+
+gboolean
+youtube_proxy_upload_async (YoutubeProxy              *self,
+                            const gchar               *filename,
+                            GHashTable                *fields,
+                            YoutubeProxyUploadCallback callback,
+                            GObject                   *weak_object,
+                            gpointer                   userdata,
+                            GError                   **error)
+{
+  SoupMultipart *mp;
+  SoupMessage *message;
+  SoupMessageHeaders *part_headers;
+  SoupBuffer *sb;
+  gchar *content_type;
+  gchar *atom_xml;
+  GMappedFile *map;
+  YoutubeProxyUploadClosure *closure;
+
+  map = g_mapped_file_new (filename, FALSE, error);
+  if (*error != NULL) {
+    g_warning ("Error opening file %s: %s", filename, (*error)->message);
+    return FALSE;
+  }
+
+  mp = soup_multipart_new ("multipart/related");
+
+  atom_xml = _construct_upload_atom_xml (fields);
+
+  sb = soup_buffer_new_with_owner (atom_xml,
+                                   strlen(atom_xml),
+                                   atom_xml,
+                                   (GDestroyNotify) g_free);
+
+  part_headers = soup_message_headers_new (SOUP_MESSAGE_HEADERS_MULTIPART);
+
+  soup_message_headers_append (part_headers, "Content-Type",
+                               "application/atom+xml; charset=UTF-8");
+
+  
+  soup_multipart_append_part (mp, part_headers, sb);
+
+  soup_buffer_free (sb);
+
+  content_type = g_content_type_guess (
+      filename,
+      (const guchar*) g_mapped_file_get_contents (map),
+      g_mapped_file_get_length (map),
+      NULL);  
+  
+  sb = soup_buffer_new_with_owner (g_mapped_file_get_contents (map),
+                                   g_mapped_file_get_length (map),
+                                   map,
+                                   (GDestroyNotify) g_mapped_file_unref);
+
+  soup_message_headers_replace (part_headers, "Content-Type", content_type);
+  
+  soup_multipart_append_part (mp, part_headers, sb);
+  
+  soup_buffer_free (sb);
+
+  soup_message_headers_free (part_headers);
+  
+  message = soup_form_request_new_from_multipart (UPLOAD_URL, mp);
+
+  soup_multipart_free (mp);
+
+  _set_upload_headers (self, message->request_headers, filename);
+
+  closure = _upload_async_closure_new (self, callback, message, weak_object,
+                                       userdata);
+
+  _rest_proxy_queue_message (REST_PROXY (self), message, _upload_completed_cb,
+                             closure);
+
+  return TRUE;
+}
diff --git a/rest-extras/youtube-proxy.h b/rest-extras/youtube-proxy.h
new file mode 100644
index 0000000..2b4673a
--- /dev/null
+++ b/rest-extras/youtube-proxy.h
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef _YOUTUBE_PROXY
+#define _YOUTUBE_PROXY
+
+#include <rest/rest-proxy.h>
+
+G_BEGIN_DECLS
+
+#define YOUTUBE_TYPE_PROXY youtube_proxy_get_type()
+
+#define YOUTUBE_PROXY(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), YOUTUBE_TYPE_PROXY, YoutubeProxy))
+
+#define YOUTUBE_PROXY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), YOUTUBE_TYPE_PROXY, YoutubeProxyClass))
+
+#define YOUTUBE_IS_PROXY(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), YOUTUBE_TYPE_PROXY))
+
+#define YOUTUBE_IS_PROXY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), YOUTUBE_TYPE_PROXY))
+
+#define YOUTUBE_PROXY_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), YOUTUBE_TYPE_PROXY, YoutubeProxyClass))
+
+typedef struct _YoutubeProxyPrivate YoutubeProxyPrivate;
+
+/**
+ * YoutubeProxy:
+ *
+ * #YoutubeProxy has no publicly available members.
+ */
+typedef struct {
+  RestProxy parent;
+  YoutubeProxyPrivate *priv;
+} YoutubeProxy;
+
+typedef struct {
+  RestProxyClass parent_class;
+  /*< private >*/
+  /* padding for future expansion */
+  gpointer _padding_dummy[8];
+} YoutubeProxyClass;
+
+#define YOUTUBE_PROXY_ERROR youtube_proxy_error_quark()
+
+GType youtube_proxy_get_type (void);
+
+RestProxy* youtube_proxy_new (const gchar *developer_key);
+
+RestProxy* youtube_proxy_new_with_auth (const gchar *developer_key,
+        const gchar *user_auth);
+
+typedef void (*YoutubeProxyUploadCallback)(YoutubeProxy   *proxy,
+                                           const gchar   *payload,
+                                           const GError  *error,
+                                           GObject       *weak_object,
+                                           gpointer       userdata);
+
+gboolean youtube_proxy_upload_async (YoutubeProxy              *self,
+                                     const gchar               *filename,
+                                     GHashTable                *fields,
+                                     YoutubeProxyUploadCallback callback,
+                                     GObject                   *weak_object,
+                                     gpointer                   userdata,
+                                     GError                   **error);
+
+G_END_DECLS
+
+#endif /* _YOUTUBE_PROXY */
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