abstract request

2 files changed, 65 insertions, 2 deletions

diff --git a/lib/webcals/request/abstract.js b/lib/webcals/request/abstract.js
index 7d31540..fe47de9 100644
--- a/lib/webcals/request/abstract.js
+++ b/lib/webcals/request/abstract.js
@@ -1,9 +1,72 @@
 (function(module, ns) {
 
-  function Abstract() {
+  var SAX = ns.require('sax');
+  var XHR = ns.require('xhr');
 
+
+  /**
+   * Creates an (Web/Cal)Dav request.
+   *
+   * @param {String} url location of resource.
+   * @param {Object} options additional options for request.
+   */
+  function Abstract(url, options) {
+    var key;
+
+    if (typeof(url) === 'undefined' || !url) {
+      throw new Error('request requires a url');
+    }
+
+    this.url = url;
+    this.sax = new SAX();
+
+    for (key in options) {
+      if (options.hasOwnProperty(key)) {
+        this[key] = options[key];
+      }
+    }
   }
 
+  Abstract.prototype = {
+
+    _createXhr: function() {
+      return new XHR({
+        url: this.url
+      });
+    },
+
+    _createPayload: function() {
+      return '';
+    },
+
+    /**
+     * Sends request to server.
+     *
+     * @param {Function} callback node style callback.
+     *                            Receives three arguments
+     *                            error, parsedData, xhr.
+     */
+    send: function(callback) {
+      var self = this;
+      var req = this.xhr = this._createXhr();
+      req.data = this._createPayload();
+
+      // in the future we may stream data somehow
+      req.send(function xhrResult() {
+        var xhr = req.xhr;
+        if (xhr.status > 199 && xhr.status < 300) {
+          // success
+          self.sax.write(xhr.responseText).close();
+
+          callback(null, self.sax.root, req);
+        } else {
+          // fail
+          callback(new Error('http error code: ' + xhr.status));
+        }
+      });
+    }
+  };
+
   module.exports = Abstract;
 
 }.apply(
diff --git a/lib/webcals/xhr.js b/lib/webcals/xhr.js
index f049c3f..f20415f 100644
--- a/lib/webcals/xhr.js
+++ b/lib/webcals/xhr.js
@@ -92,7 +92,7 @@
         if (xhr.readyState === 4) {
           data = xhr.responseText;
           this.waiting = false;
-          callback(data, xhr);
+          callback(null, xhr);
         }
       }.bind(this);