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gaia/apps/operatorvariant/js/resources.js

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+/* exported Resources */
+
+'use strict';
+
+var Resources = {
+  load: function r_load(url, type, onsuccess, onerror) {
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url, true);
+    xhr.responseType = type;
+    var mimetype = this.getMimetype(url);
+    if (mimetype) {
+      xhr.overrideMimeType(mimetype);
+    }
+    xhr.onload = function() {
+      if (xhr.status === 200) {
+        onsuccess && onsuccess(xhr.response);
+      } else {
+        console.error('Resources.js: Failed to fetch file ' + url + '. ' +
+                      xhr.statusText);
+        onerror && onerror(xhr.statusText);
+      }
+    };
+    // Workaround due to https://bugzilla.mozilla.org/show_bug.cgi?id=827243
+    try {
+      xhr.send();
+    } catch (e) {
+      // TODO Remove when 827243 will be fixed.
+      console.error('Resources.js: Failed to fetch file ' + url + '. ' +
+                    xhr.statusText);
+      onerror && onerror('404: due to bug 827243');
+    }
+  },
+
+  getMimetype: function r_getMimetype(fileName) {
+    var fileExtension = fileName.split('.').pop();
+    var mimetype = false;
+    if (fileExtension) {
+      switch (fileExtension) {
+        case 'ogg':
+          mimetype = 'audio/ogg';
+          break;
+        case 'json':
+          mimetype = 'application/json';
+          break;
+        case 'mp3':
+          mimetype = 'audio/mpeg';
+          break;
+        case 'mp4':
+          mimetype = 'audio/mp4';
+          break;
+      }
+    }
+    return mimetype;
+  }
+};