Add uploadContent method

lib/http-api.js

@@ -10,7 +10,6 @@ var utils = require("./utils");
 TODO:
 - CS: complete register function (doing stages)
 - Identity server: linkEmail, authEmail, bindEmail, lookup3pid
-- uploadContent (?)
 */
 
 /**
@@ -139,6 +138,64 @@ module.exports.MatrixHttpApi.prototype = {
         };
     },
 
+    uploadContent: function(file, callback) {
+        if (callback !== undefined && !utils.isFunction(callback)) {
+            throw Error(
+                "Expected callback to be a function but got " + typeof callback
+            );
+        }
+        var queryParams = {
+            filename: file.name,
+            access_token: this.opts.accessToken
+        };
+        var defer = q.defer();
+        // browser-request doesn't support File objects because it deep-copies
+        // the options using JSON.parse(JSON.stringify(options)). Instead of
+        // loading the whole file into memory as a string and letting
+        // browser-request base64 encode and then decode it again, we just
+        // use XMLHttpRequest directly.
+        // (browser-request doesn't support progress either, which is also kind
+        // of important here)
+        var xhr = new XMLHttpRequest();
+        var cb = requestCallback(defer, callback, this.opts.onlyData);
+
+        var timeout_fn = function() {
+            xhr.abort();
+            cb(new Error('Timeout'));
+        }
+
+        xhr.timeout_timer = setTimeout(timeout_fn, 30000);
+
+        xhr.onreadystatechange = function() {
+            switch (xhr.readyState) {
+                case XMLHttpRequest.DONE:
+                    clearTimeout(xhr.timeout_timer);
+
+                    var resp = JSON.parse(xhr.responseText);
+                    if (resp.content_uri === undefined) {
+                        cb(new Error('Bad response'));
+                        return;
+                    }
+
+                    cb(undefined, xhr, resp.content_uri);
+                    break;
+            }
+        };
+        xhr.upload.addEventListener("progress", function(ev) {
+            clearTimeout(xhr.timeout_timer);
+            xhr.timeout_timer = setTimeout(timeout_fn, 30000);
+            defer.notify(ev);
+        });
+        var url = this.opts.baseUrl+"/_matrix/media/v1/upload";
+        url += "?access_token="+encodeURIComponent(this.opts.accessToken);
+        url += "&filename="+encodeURIComponent(file.name);
+
+        xhr.open("POST", url);
+        xhr.send(file);
+
+        return defer.promise;
+    },
+
     /**
      * Perform an authorised request to the homeserver.
      * @param {Function} callback Optional. The callback to invoke on