Adding support for params

lib/axios.js

@@ -1,4 +1,5 @@
 var Promise = require('es6-promise').Promise;
+var buildUrl = require('./buildUrl');
 var defaults = require('./defaults');
 var forEach = require('./forEach');
 var merge = require('./merge');
@@ -11,17 +12,31 @@ var axios = module.exports = function axios(options) {
     transformResponse: defaults.transformResponse
   }, options);
 
-  var promise = new Promise(function (resolve, reject) {
-    var request = new(XMLHttpRequest || ActiveXObject)('Microsoft.XMLHTTP');
-    var data = transformData(options.data, options.headers, options.transformRequest);
+  // Don't allow overriding defaults.withCredentials
+  options.withCredentials = options.withCredentials || defaults.withCredentials;
 
-    // Open request and listen for ready state
-    request.open(options.method, options.url, true);
+  var promise = new Promise(function (resolve, reject) {
+    // Create the request
+    var request = new(XMLHttpRequest || ActiveXObject)('Microsoft.XMLHTTP');
+    var data = transformData(
+      options.data,
+      options.headers,
+      options.transformRequest
+    );
+
+    // Open the request
+    request.open(options.method, buildUrl(options.url, options.params), true);
+
+    // Listen for ready state
     request.onreadystatechange = function () {
       if (request && request.readyState === 4) {
         // Prepare the response
         var response = {
-          data: transformData(request.responseText, options.headers, options.transformResponse),
+          data: transformData(
+            request.responseText,
+            options.headers,
+            options.transformResponse
+          ),
           status: request.status,
           headers: headers,
           config: options
@@ -48,8 +63,7 @@ var axios = module.exports = function axios(options) {
 
     forEach(headers, function (val, key) {
       // Remove Content-Type if data is undefined
-      if (typeof data === 'undefined' &&
-          key.toLowerCase() === 'content-type') {
+      if (typeof data === 'undefined' && key.toLowerCase() === 'content-type') {
         delete headers[key];
       }
       // Otherwise add header to the request
@@ -58,6 +72,22 @@ var axios = module.exports = function axios(options) {
       }
     });
 
+    // Add withCredentials to request if needed
+    if (options.withCredentials) {
+      request.withCredentials = true;
+    }
+
+    // Add responseType to request if needed
+    if (options.responseType) {
+      try {
+        request.responseType = options.responseType;
+      } catch (e) {
+        if (request.responseType !== 'json') {
+          throw e;
+        }
+      }
+    }
+
     // Send the request
     request.send(data);
   });

lib/buildUrl.js

@@ -0,0 +1,45 @@
+'use strict';
+
+var forEach = require('./forEach');
+
+function encode(val) {
+  return encodeURIComponent(val).
+    replace(/%40/gi, '@').
+    replace(/%3A/gi, ':').
+    replace(/%24/g, '$').
+    replace(/%2C/gi, ',').
+    replace(/%20/g, '+');
+}
+
+module.exports = function buildUrl(url, params) {
+  if (!params) {
+    return url;
+  }
+
+  var parts = [];
+
+  forEach(params, function (val, key) {
+    if (val === null || typeof val === 'undefined') {
+      return;
+    }
+    if (Object.prototype.toString.call(val) !== '[object Array]') {
+      val = [val];
+    }
+
+    forEach(val, function (v) {
+      if (Object.prototype.toString.call(v) === '[object Date]') {
+        v = v.toISOString();
+      }
+      else if (typeof v === 'object') {
+        v = JSON.stringify(v);
+      }
+      parts.push(encode(key) + '=' + encode(v));
+    });
+  });
+
+  if (parts.length > 0) {
+    url += (url.indexOf('?') === -1 ? '?' : '&') + parts.join('&');
+  }
+
+  return url;
+};