Rewrote the data conversion logic in ajax. Should be cleaner and faster.
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jaubourg
jaubourg
parent
4c49c87d4d
commit
fef0f63526
2 changed files with 71 additions and 113 deletions
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@ -166,11 +166,6 @@ jQuery.extend({
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xhr: function() {
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return new window.XMLHttpRequest();
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},
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xhrResponseFields: {
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xml: "XML",
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text: "Text",
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json: "JSON"
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},
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accepts: {
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xml: "application/xml, text/xml",
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@ -195,13 +190,13 @@ jQuery.extend({
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// 4) the catchall symbol "*" can be used
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// 5) execution will start with transport dataType and THEN continue down to "*" if needed
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prefilters: {},
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// Transports bindings
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// 1) key is the dataType
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// 2) the catchall symbol "*" can be used
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// 3) selection will start with transport dataType and THEN go to "*" if needed
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transports: {},
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// Checkers
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// 1) key is dataType
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// 2) they are called to control successful response
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175
src/xhr.js
175
src/xhr.js
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@ -6,11 +6,9 @@ var rquery_xhr = /\?/,
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rnoContent = /^(?:GET|HEAD)$/,
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rts = /([?&])_=[^&]*/,
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rurl = /^(\w+:)?\/\/([^\/?#]+)/,
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sliceFunc = Array.prototype.slice,
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isFunction = jQuery.isFunction;
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sliceFunc = Array.prototype.slice;
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// Creates a jQuery xhr object
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jQuery.xhr = function( _native ) {
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@ -86,7 +84,7 @@ jQuery.xhr = function( _native ) {
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if ( data && s.processData && typeof data != "string" ) {
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data = s.data = jQuery.param( data , s.traditional );
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}
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// Get internal
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internal = jQuery.xhr.prefilter( s ).transport( s );
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@ -147,7 +145,7 @@ jQuery.xhr = function( _native ) {
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requestHeaders[ i.toLowerCase() ] = headers[ i ];
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}
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}
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callbackContext = s.context || s;
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globalEventContext = s.context ? jQuery(s.context) : jQuery.event;
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@ -223,112 +221,77 @@ jQuery.xhr = function( _native ) {
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// Chain data conversions and determine the final value
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// (if an exception is thrown in the process, it'll be notified as an error)
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try {
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function checkData(data) {
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if ( data !== undefined ) {
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var testFunction = s.dataCheckers[srcDataType];
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if ( isFunction( testFunction ) ) {
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testFunction(data);
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}
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}
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}
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function convertData (data) {
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var conversionFunction = dataConverters[srcDataType+" => "+destDataType] ||
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dataConverters["* => "+destDataType],
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noFunction = ! isFunction( conversionFunction );
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if ( noFunction ) {
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if ( srcDataType != "text" && destDataType != "text" ) {
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// We try to put text inbetween
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var first = dataConverters[srcDataType+" => text"] ||
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dataConverters["* => text"],
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second = dataConverters["text => "+destDataType] ||
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dataConverters["* => "+destDataType],
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areFunctions = isFunction( first ) && isFunction( second );
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if ( areFunctions ) {
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conversionFunction = function (data) {
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return second( first ( data ) );
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};
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}
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noFunction = ! areFunctions;
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}
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if ( noFunction ) {
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jQuery.error( "no data converter between " + srcDataType + " and " + destDataType );
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}
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}
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return conversionFunction(data);
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}
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var dataTypes = s.dataTypes,
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i,
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length,
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data = response,
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var i,
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current,
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prev,
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checker,
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conv1,
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conv2,
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oneConv,
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convertion,
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dataTypes = s.dataTypes,
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dataCheckers = s.dataCheckers,
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dataConverters = s.dataConverters,
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srcDataType,
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destDataType,
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responseTypes = s.xhrResponseFields;
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for ( i = 0, length = dataTypes.length ; i < length ; i++ ) {
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destDataType = dataTypes[i];
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if ( !srcDataType ) { // First time
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// Copy type
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srcDataType = destDataType;
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// Check
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checkData(data);
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// Apply dataFilter
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if ( isFunction( s.dataFilter ) ) {
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data = s.dataFilter(data, s.dataType);
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// Recheck data
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checkData(data);
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dataFilter = s.dataFilter,
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responses = {
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"xml": "XML",
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"text": "Text"
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};
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for( i = 0 ; i < dataTypes.length ; i++ ) {
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current = dataTypes[ i ];
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if ( i ) {
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prev = dataTypes[ i - 1 ];
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if ( prev === "*" ) {
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prev = current;
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} else if ( current !== "*" && prev !== current ) {
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oneConv = conv1 =
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dataConverters[ ( conversion = prev + " => " + current ) ] ||
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dataConverters[ "* => " + current ];
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if ( ! oneConv && prev !== "text" && current !== "text" ) {
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conv1 = dataConverters[ prev + " => text" ] || dataConverters[ "* => text" ];
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conv2 = dataConverters[ "text => " + current ];
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}
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if ( oneConv || conv1 && conv2 ) {
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response = oneConv ? conv1( response ) : conv2( conv1( response ) );
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} else {
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throw "no " + conversion;
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}
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}
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} else { // Subsequent times
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// handle auto
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// JULIAN: for reasons unknown to me === doesn't work here
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if (destDataType == "*") {
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destDataType = srcDataType;
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} else if ( srcDataType != destDataType ) {
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// Convert
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data = convertData(data);
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// Copy type & check
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srcDataType = destDataType;
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checkData(data);
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}
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}
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// Copy response into the xhr if it hasn't been already
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var responseDataType,
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responseType = responseTypes[srcDataType];
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if ( responseType ) {
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responseDataType = srcDataType;
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} else {
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responseType = responseTypes[ responseDataType = "text" ];
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checker = dataCheckers[ current ];
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if ( response != null && checker ) {
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checker( response );
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}
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if ( responseType !== 1 ) {
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xhr[ "response" + responseType ] = data;
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responseTypes[ responseType ] = 1;
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if ( responses[ current ] ) {
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xhr[ "response" + responses[ current ] ] = response;
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responses[ current ] = 0;
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}
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if ( ! i && dataFilter ) {
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response = dataFilter( response );
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dataTypes = s.dataTypes;
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dataFilter = 0;
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i--;
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}
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}
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// We have a real success
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success = data;
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success = response;
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isSuccess = 1;
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} catch(e) {
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@ -406,7 +369,7 @@ jQuery.xhr = function( _native ) {
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// Ready state change
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function setState( value ) {
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xhr.readyState = value;
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if ( isFunction( xhr.onreadystatechange ) ) {
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if ( jQuery.isFunction( xhr.onreadystatechange ) ) {
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xhr.onreadystatechange();
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}
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}
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