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1 //>>excludeStart("exclude", pragmas.exclude);
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2 define([ "shoestring" ], function(){
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3 //>>excludeEnd("exclude");
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4
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5 /**
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6 * Make an HTTP request to a url.
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7 *
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8 * **NOTE** the following options are supported:
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9 *
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10 * - *method* - The HTTP method used with the request. Default: `GET`.
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11 * - *data* - Raw object with keys and values to pass with request as query params. Default `null`.
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12 * - *headers* - Set of request headers to add. Default `{}`.
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13 * - *async* - Whether the opened request is asynchronouse. Default `true`.
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14 * - *success* - Callback for successful request and response. Passed the response data.
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15 * - *error* - Callback for failed request and response.
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16 * - *cancel* - Callback for cancelled request and response.
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17 *
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18 * @param {string} url The url to request.
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19 * @param {object} options The options object, see Notes.
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20 * @return shoestring
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21 * @this shoestring
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22 */
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23
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24 shoestring.ajax = function( url, options ) {
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25 var params = "", req = new XMLHttpRequest(), settings, key;
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26
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27 settings = shoestring.extend( {}, shoestring.ajax.settings );
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28
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29 if( options ){
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30 shoestring.extend( settings, options );
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31 }
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32
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33 if( !url ){
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34 url = settings.url;
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35 }
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36
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37 if( !req || !url ){
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38 return;
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39 }
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40
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41 // create parameter string from data object
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42 if( settings.data ){
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43 for( key in settings.data ){
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44 if( settings.data.hasOwnProperty( key ) ){
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45 if( params !== "" ){
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46 params += "&";
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47 }
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48 params += encodeURIComponent( key ) + "=" +
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49 encodeURIComponent( settings.data[key] );
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50 }
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51 }
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52 }
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53
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54 // append params to url for GET requests
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55 if( settings.method === "GET" && params ){
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56 //>>includeStart("development", pragmas.development);
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57 if( url.indexOf("?") >= 0 ){
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58 shoestring.error( 'ajax-url-query' );
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59 }
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60 //>>includeEnd("development");
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61
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62 url += "?" + params;
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63 }
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64
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65 req.open( settings.method, url, settings.async );
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66
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67 if( req.setRequestHeader ){
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68 req.setRequestHeader( "X-Requested-With", "XMLHttpRequest" );
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69
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70 // Set 'Content-type' header for POST requests
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71 if( settings.method === "POST" && params ){
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72 req.setRequestHeader( "Content-type", "application/x-www-form-urlencoded" );
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73 }
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74
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75 for( key in settings.headers ){
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76 if( settings.headers.hasOwnProperty( key ) ){
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77 req.setRequestHeader(key, settings.headers[ key ]);
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78 }
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79 }
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80 }
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81
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82 req.onreadystatechange = function () {
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83 if( req.readyState === 4 ){
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84 // Trim the whitespace so shoestring('<div>') works
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85 var res = (req.responseText || '').replace(/^\s+|\s+$/g, '');
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86 if( req.status.toString().indexOf( "0" ) === 0 ){
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87 return settings.cancel( res, req.status, req );
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88 }
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89 else if ( req.status.toString().match( /^(4|5)/ ) && RegExp.$1 ){
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90 return settings.error( res, req.status, req );
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91 }
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92 else if (settings.success) {
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93 return settings.success( res, req.status, req );
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94 }
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95 }
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96 };
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97
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98 if( req.readyState === 4 ){
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99 return req;
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100 }
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101
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102 // Send request
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103 if( settings.method === "POST" && params ){
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104 req.send( params );
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105 } else {
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106 req.send();
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107 }
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108
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109 return req;
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110 };
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111
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112 shoestring.ajax.settings = {
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113 success: function(){},
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114 error: function(){},
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115 cancel: function(){},
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116 method: "GET",
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117 async: true,
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118 data: null,
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119 headers: {}
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120 };
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121
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122 //>>excludeStart("exclude", pragmas.exclude);
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123 });
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124 //>>excludeEnd("exclude");
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