[gnome-software/wip/temp/ubuntu-xenial-rebased: 97/326] Refactor common code for sending requests to reviews.ubuntu.com

[Iain Lane <iainl src gnome org>]

commit 8d67afc95c583a3b67552667d3f3d03fe613732b
Author: Robert Ancell <robert ancell canonical com>
Date:   Fri Feb 12 13:50:18 2016 +1300

    Refactor common code for sending requests to reviews.ubuntu.com

 src/plugins/gs-plugin-ubuntu-reviews.c |  117 ++++++++++++++++++++++++++------
 1 files changed, 96 insertions(+), 21 deletions(-)
---
diff --git a/src/plugins/gs-plugin-ubuntu-reviews.c b/src/plugins/gs-plugin-ubuntu-reviews.c
index 1393ea2..dda5f7a 100644
--- a/src/plugins/gs-plugin-ubuntu-reviews.c
+++ b/src/plugins/gs-plugin-ubuntu-reviews.c
@@ -657,18 +657,13 @@ parse_review_entry (JsonNode *node, const gchar **package_name, Histogram *histo
 }
 
 static gboolean
-parse_review_entries (GsPlugin *plugin, const gchar *text, GError **error)
+parse_review_entries (GsPlugin *plugin, JsonParser *parser, GError **error)
 {
-       JsonParser *parser = NULL;
        JsonArray *array;
        gint i;
-       gboolean result = FALSE;
 
-       parser = json_parser_new ();
-       if (!json_parser_load_from_data (parser, text, -1, error))
-               goto out;
        if (!JSON_NODE_HOLDS_ARRAY (json_parser_get_root (parser)))
-               goto out;
+               return FALSE;
        array = json_node_get_array (json_parser_get_root (parser));
        for (i = 0; i < json_array_get_length (array); i++) {
                const gchar *package_name;
@@ -680,42 +675,122 @@ parse_review_entries (GsPlugin *plugin, const gchar *text, GError **error)
 
                /* ...write into the database (abort everything if can't write) */
                if (!set_package_stats (plugin, package_name, &histogram, error))
-                       goto out;
+                       return FALSE;
        }
-       result = TRUE;
 
-out:
-       g_clear_object (&parser);
+       return TRUE;
+}
 
-       return result;
+static void
+sign_message (SoupMessage *message, OAuthMethod method,
+             const gchar *consumer_key, const gchar *consumer_secret,
+             const gchar *token_key, const gchar *token_secret)
+{
+       g_autofree gchar *url = NULL, *oauth_authorization_parameters = NULL, *authorization_text = NULL;
+       gchar **url_parameters = NULL;
+       int url_parameters_length;
+
+       url = soup_uri_to_string (soup_message_get_uri (message), FALSE);
+
+       url_parameters_length = oauth_split_url_parameters(url, &url_parameters);
+       oauth_sign_array2_process (&url_parameters_length, &url_parameters,
+                                  NULL,
+                                  method,
+                                  message->method,
+                                  consumer_key, consumer_secret,
+                                  token_key, token_secret);
+       oauth_authorization_parameters = oauth_serialize_url_sep (url_parameters_length, 1, url_parameters, 
", ", 6);
+       oauth_free_array (&url_parameters_length, &url_parameters);
+       authorization_text = g_strdup_printf ("OAuth realm=\"Ratings and Reviews\", %s", 
oauth_authorization_parameters);
+       soup_message_headers_append (message->request_headers, "Authorization", authorization_text);
 }
 
 static gboolean
-download_review_stats (GsPlugin *plugin, GError **error)
+send_review_request (GsPlugin *plugin, const gchar *method, const gchar *path, JsonBuilder *request, 
gboolean do_sign, JsonParser **result, GError **error)
 {
-       guint status_code;
+       GsPluginPrivate *priv = plugin->priv;
        g_autofree gchar *uri = NULL;
        g_autoptr(SoupMessage) msg = NULL;
-       g_auto(GStrv) split = NULL;
+       guint status_code;
 
-       /* Get the review stats using HTTP */
-       uri = g_strdup_printf ("%s/api/1.0/review-stats/any/any/",
-                              UBUNTU_REVIEWS_SERVER);
-       msg = soup_message_new (SOUP_METHOD_GET, uri);
        if (!setup_networking (plugin, error))
                return FALSE;
+
+       uri = g_strdup_printf ("%s%s",
+                              UBUNTU_REVIEWS_SERVER, path);
+       msg = soup_message_new (method, uri);
+
+       if (request != NULL) {
+               JsonGenerator *generator;
+               gchar *data;
+               gsize length;
+
+               generator = json_generator_new ();
+               json_generator_set_root (generator, json_builder_get_root (request));
+               data = json_generator_to_data (generator, &length);
+               soup_message_set_request (msg, "application/json", SOUP_MEMORY_TAKE, data, length);
+               g_object_unref (generator);
+       }
+
+       if (do_sign)
+               sign_message (msg,
+                             OA_PLAINTEXT,
+                             priv->consumer_key,
+                             priv->consumer_secret,
+                             priv->token_key,
+                             priv->token_secret);
+
        status_code = soup_session_send_message (plugin->priv->session, msg);
        if (status_code != SOUP_STATUS_OK) {
                g_set_error (error,
                             GS_PLUGIN_ERROR,
                             GS_PLUGIN_ERROR_FAILED,
-                            "Failed to download Ubuntu reviews dump: %s",
+                            "Got status code %s from reviews.ubuntu.com",
                             soup_status_get_phrase (status_code));
                return FALSE;
        }
 
+       if (result != NULL) {
+               JsonParser *parser;
+               const gchar *content_type;
+
+               content_type = soup_message_headers_get_content_type (msg->response_headers, NULL);
+               if (g_strcmp0 (content_type, "application/json") != 0) {
+                       g_set_error (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_FAILED,
+                                    "Got unknown content type %s from reviews.ubuntu.com",
+                                    content_type);
+                       return FALSE;
+               }
+
+               parser = json_parser_new ();
+               if (!json_parser_load_from_data (parser, msg->response_body->data, -1, error)) {
+                       g_object_unref (parser);
+                       return FALSE;
+               }
+               *result = parser;
+       }
+
+       return TRUE;
+}
+
+static gboolean
+download_review_stats (GsPlugin *plugin, GError **error)
+{
+       guint status_code;
+       g_autofree gchar *uri = NULL;
+       g_autoptr(SoupMessage) msg = NULL;
+       JsonParser *result;
+       gboolean ret;
+
+       if (!send_review_request (plugin, SOUP_METHOD_GET, "/api/1.0/review-stats/any/any/", NULL, FALSE, 
&result, error))
+               return FALSE;
+
        /* Extract the stats from the data */
-       if (!parse_review_entries (plugin, msg->response_body->data, error))
+       ret = parse_review_entries (plugin, result, error);
+       g_object_unref (result);
+       if (!ret)
                return FALSE;
 
        /* Record the time we downloaded it */