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assets/webapps/findmydevice.gaiamobile.org/js/requester.js

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+/* global hawk */
+/* global Config */
+/* global DUMP */
+
+'use strict';
+
+var Requester = {
+  XHR_TIMEOUT_MS: 60000,
+
+  _url: null,
+
+  _hawkCredentials: null,
+
+  init: function fmdr_init() {
+    this._url = Config.api_url + '/' + Config.api_version;
+  },
+
+  setHawkCredentials: function fmdr_set_hawk_credentials(id, key) {
+    this._hawkCredentials = {
+      id: id,
+      key: key,
+      algorithm: 'sha256'
+    };
+  },
+
+  post: function fmdr_post(url, data, onsuccess, onerror) {
+    url = this._url + url;
+    data = JSON.stringify(data);
+    DUMP('POST-ing to ' + url + ': ' + data);
+
+    var xhr = new XMLHttpRequest({mozSystem: true});
+    xhr.open('POST', url);
+    xhr.timeout = this.XHR_TIMEOUT_MS;
+    xhr.setRequestHeader('Content-Type', 'application/json');
+
+    var hawkHeader = null;
+    if (this._hawkCredentials) {
+      var hawkOptions = {
+        credentials: this._hawkCredentials,
+        contentType: 'application/json',
+        payload: data
+      };
+
+      hawkHeader = hawk.client.header(url, 'POST', hawkOptions);
+      xhr.setRequestHeader('Authorization', hawkHeader.field);
+    }
+
+    xhr.onload = function fmdr_xhr_onload() {
+      var valid = true;
+      if (hawkHeader !== null) {
+        valid = hawk.client.authenticate(
+          xhr, this._hawkCredentials, hawkHeader.artifacts,
+          {payload: xhr.responseText});
+      }
+
+      if (!valid) {
+        DUMP('ignoring invalid HAWK signature');
+        return;
+      }
+
+      if (xhr.status == 200) {
+        DUMP('successful request, response: ' + xhr.response);
+        onsuccess && onsuccess(JSON.parse(xhr.responseText));
+      } else if (xhr.status !== 200) {
+        DUMP('request failed with status ' + xhr.status);
+        onerror && onerror(xhr);
+      }
+    };
+
+    xhr.onerror = function fmd_xhr_onerror() {
+      DUMP('request failed with status ' + xhr.status);
+      onerror && onerror(xhr);
+    };
+
+    xhr.ontimeout = function fmd_xhr_ontimeout() {
+      DUMP('server request timed out!');
+      xhr.onerror();
+    };
+
+    xhr.send(data);
+  }
+};
+
+Requester.init();