Re-organizes ajax.js: prefilters and transports are no longer stored in ajaxSettings (their structure is not handled correctly by extend() and was causing some overhead when constructing the final options map in ajax()); base function for ajaxPrefilter and ajaxTransport has been renamed and split in two (one for inspection, one for addition); response/dataType determination and data conversion logics have been externalized from the ajax() internal callback; data conversion no longer sets responseXXX fields; some minor re-formatting and simplifications.
This commit is contained in:
jaubourg
parent
4413c2fd93
commit
bea4815294
585
src/ajax.js
585
src/ajax.js
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@ -2,6 +2,7 @@
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var r20 = /%20/g,
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rbracket = /\[\]$/,
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rCRLF = /\r?\n/g,
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rhash = /#.*$/,
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rheaders = /^(.*?):\s*(.*?)\r?$/mg, // IE leaves an \r character at EOL
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rinput = /^(?:color|date|datetime|email|hidden|month|number|password|range|search|tel|text|time|url|week)$/i,
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@ -9,15 +10,31 @@ var r20 = /%20/g,
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rquery = /\?/,
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rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
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rselectTextarea = /^(?:select|textarea)/i,
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rspacesAjax = /\s+/,
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rts = /([?&])_=[^&]*/,
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rurl = /^(\w+:)?\/\/([^\/?#:]+)(?::(\d+))?/,
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rCRLF = /\r?\n/g,
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// Slice function
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sliceFunc = Array.prototype.slice,
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// Keep a copy of the old load method
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_load = jQuery.fn.load;
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_load = jQuery.fn.load,
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// Prefilters
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// 1) They are useful to introduce custom dataTypes (see transport/jsonp for an example)
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// 2) These are called:
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// * BEFORE asking for a transport
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// * AFTER param serialization (s.data is a string if s.processData is true)
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// 3) key is the dataType
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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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jQuery.fn.extend({
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load: function( url, params, callback ) {
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@ -204,22 +221,6 @@ jQuery.extend({
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text: "responseText"
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},
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// Prefilters
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// 1) They are useful to introduce custom dataTypes (see transport/jsonp for an example)
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// 2) These are called:
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// * BEFORE asking for a transport
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// * AFTER param serialization (s.data is a string if s.processData is true)
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// 3) key is the dataType
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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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// List of data converters
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// 1) key format is "source_type destination_type" (a single space in-between)
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// 2) the catchall symbol "*" can be used for source_type
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@ -240,11 +241,11 @@ jQuery.extend({
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},
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ajaxPrefilter: function( a , b ) {
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ajaxPrefilterOrTransport( "prefilters" , a , b );
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prefiltersOrTransports( prefilters , a , b );
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},
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ajaxTransport: function( a , b ) {
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return ajaxPrefilterOrTransport( "transports" , a , b );
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return prefiltersOrTransports( transports , a , b );
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},
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// Main method
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@ -262,9 +263,6 @@ jQuery.extend({
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var // Create the final options object
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s = jQuery.extend( true , {} , jQuery.ajaxSettings , options ),
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// jQuery lists
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jQuery_lastModified = jQuery.lastModified,
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jQuery_etag = jQuery.etag,
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// Callbacks contexts
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// We force the original context if it exists
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// or take it from jQuery.ajaxSettings otherwise
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@ -314,23 +312,16 @@ jQuery.extend({
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// Builds headers hashtable if needed
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getResponseHeader: function( key ) {
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var match;
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if ( state === 2 ) {
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if ( !responseHeaders ) {
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responseHeaders = {};
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while( ( match = rheaders.exec( responseHeadersString ) ) ) {
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responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
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}
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}
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match = responseHeaders[ key.toLowerCase() ];
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}
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return match || null;
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},
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@ -357,109 +348,27 @@ jQuery.extend({
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// State is "done" now
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state = 2;
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// Dereference transport for early garbage collection
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// (no matter how long the jXHR object will be used)
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transport = undefined;
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// Set readyState
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jXHR.readyState = status ? 4 : 0;
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// Cache response headers
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responseHeadersString = headers || "";
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// Clear timeout if it exists
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if ( timeoutTimer ) {
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clearTimeout(timeoutTimer);
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}
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var // Reference dataTypes, converters and responseFields
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dataTypes = s.dataTypes,
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converters = s.converters,
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responseFields = s.responseFields,
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responseField,
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// Dereference transport for early garbage collection
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// (no matter how long the jXHR object will be used)
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transport = undefined;
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// Flag to mark as success
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isSuccess,
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// Stored success
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// Cache response headers
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responseHeadersString = headers || "";
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// Set readyState
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jXHR.readyState = status ? 4 : 0;
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var isSuccess,
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success,
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// Stored error
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error,
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// To keep track of statusCode based callbacks
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oldStatusCode,
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// Actual response
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response;
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// If we got responses:
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// - find the right one
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// - update dataTypes accordingly
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// - set responseXXX accordingly too
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if ( responses ) {
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var contents = s.contents,
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transportDataType = dataTypes[0],
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ct,
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type,
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finalDataType,
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firstDataType;
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// Auto (xml, json, script or text determined given headers)
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if ( transportDataType === "*" ) {
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// Remove all auto types
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while( dataTypes[0] === "*" ) {
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dataTypes.shift();
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}
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transportDataTypes = dataTypes[0];
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// Get content type
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ct = jXHR.getResponseHeader( "content-type" );
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// Check if it's a known type
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for ( type in contents ) {
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if ( contents[ type ] && contents[ type ].test( ct ) ) {
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dataTypes.unshift( ( transportDataType = type ) );
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break;
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}
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}
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}
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// Check to see if we have a response for the expected dataType
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if ( transportDataType in responses ) {
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finalDataType = transportDataType;
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} else {
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// Try convertible dataTypes
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for ( type in responses ) {
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if ( ! firstDataType ) {
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firstDataType = type;
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}
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if ( ! transportDataType || converters[ type + " " + transportDataType ] ) {
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finalDataType = type;
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break;
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}
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}
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// Or just use first one
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finalDataType = finalDataType || firstDataType;
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}
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// If we found a dataType
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// We get the corresponding response
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// and add the dataType to the list if needed
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if ( finalDataType ) {
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response = responses[ finalDataType ];
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if ( finalDataType !== transportDataType ) {
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dataTypes.unshift( finalDataType );
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}
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}
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// Fill responseXXX fields
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for( type in responseFields ) {
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if ( type in responses ) {
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jXHR[ responseFields[ type ] ] = responses[ type ];
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}
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}
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}
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error = ( statusText = statusText || "error" ),
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response = responses ? ajaxHandleResponses( s , jXHR , responses ) : undefined,
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lastModified,
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etag;
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// If successful, handle type chaining
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if ( status >= 200 && status < 300 || status === 304 ) {
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@ -467,14 +376,11 @@ jQuery.extend({
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// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
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if ( s.ifModified ) {
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var lastModified = jXHR.getResponseHeader("Last-Modified"),
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etag = jXHR.getResponseHeader("Etag");
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if (lastModified) {
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jQuery_lastModified[ s.url ] = lastModified;
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if ( ( lastModified = jXHR.getResponseHeader("Last-Modified") ) ) {
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jQuery.lastModified[ s.url ] = lastModified;
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}
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if (etag) {
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jQuery_etag[ s.url ] = etag;
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if ( ( etag = jXHR.getResponseHeader("Etag") ) ) {
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jQuery.etag[ s.url ] = etag;
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}
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}
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@ -482,114 +388,21 @@ jQuery.extend({
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if ( status === 304 ) {
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statusText = "notmodified";
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isSuccess = 1;
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isSuccess = true;
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// If we have data
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} else {
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statusText = "success";
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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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var i,
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tmp,
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// Current dataType
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current,
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// Previous dataType
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prev,
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// Conversion expression
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conversion,
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// Conversion function
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conv,
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// Conversion functions (when text is used in-between)
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conv1,
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conv2;
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// For each dataType in the chain
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for( i = 0 ; i < dataTypes.length ; i++ ) {
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current = dataTypes[ i ];
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// If a responseXXX field for this dataType exists
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// and if it hasn't been set yet
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responseField = responseFields[ current ];
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if ( responseField && ! ( responseField in jXHR ) ) {
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jXHR[ responseField ] = response;
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}
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// If this is not the first element
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if ( i ) {
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// Get the dataType to convert from
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prev = dataTypes[ i - 1 ];
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// If no auto and dataTypes are actually different
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if ( prev !== "*" && current !== "*" && prev !== current ) {
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// Get the converter
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conversion = prev + " " + current;
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conv = converters[ conversion ] || converters[ "* " + current ];
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// If there is no direct converter, search transitively
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if ( ! conv ) {
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conv1 = conv2 = undefined;
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for( conv1 in converters ) {
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tmp = conv1.split( " " );
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if ( tmp[ 0 ] === prev || tmp[ 0 ] === "*" ) {
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conv2 = converters[ tmp[ 1 ] + " " + current ];
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if ( conv2 ) {
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conv1 = converters[ conv1 ];
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if ( conv1 === true ) {
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conv = conv2;
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} else if ( conv2 === true ) {
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conv = conv1;
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}
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break;
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}
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}
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}
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}
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// If we found no converter, dispatch an error
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if ( ! ( conv || conv1 && conv2 ) ) {
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throw conversion;
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}
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// If found converter is not an equivalence
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if ( conv !== true ) {
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// Convert with 1 or 2 converters accordingly
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response = conv ? conv( response ) : conv2( conv1( response ) );
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}
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}
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// If it is the first element of the chain
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// and we have a dataFilter
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} else if ( s.dataFilter ) {
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// Apply the dataFilter
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response = s.dataFilter( response , current );
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// Get dataTypes again in case the filter changed them
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dataTypes = s.dataTypes;
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}
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}
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// End of loop
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// We have a real success
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success = response;
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isSuccess = 1;
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// If an exception was thrown
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success = ajaxConvert( s , response );
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statusText = "success";
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isSuccess = true;
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} catch(e) {
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// We have a parsererror
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statusText = "parsererror";
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error = "" + e;
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}
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}
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// if not success, mark it as an error
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} else {
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error = statusText = statusText || "error";
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}
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// Set data for the fake xhr object
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@ -604,9 +417,8 @@ jQuery.extend({
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}
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// Status-dependent callbacks
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oldStatusCode = statusCode;
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jXHR.statusCode( statusCode );
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statusCode = undefined;
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jXHR.statusCode( oldStatusCode );
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if ( s.global ) {
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globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ) ,
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@ -635,13 +447,13 @@ jQuery.extend({
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jXHR.statusCode = function( map ) {
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if ( map ) {
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var tmp;
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if ( statusCode ) {
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if ( state < 2 ) {
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for( tmp in map ) {
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statusCode[ tmp ] = [ statusCode[ tmp ] , map[ tmp ] ];
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}
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} else {
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tmp = map[ jXHR.status ];
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jXHR.done( tmp ).fail( tmp );
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jXHR.then( tmp , tmp );
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}
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}
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return this;
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@ -652,7 +464,7 @@ jQuery.extend({
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s.url = ( "" + ( url || s.url ) ).replace( rhash , "" );
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// Extract dataTypes list
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s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( /\s+/ );
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s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( rspacesAjax );
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// Determine if a cross-domain request is in order
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if ( ! s.crossDomain ) {
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@ -712,11 +524,11 @@ jQuery.extend({
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// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
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if ( s.ifModified ) {
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if ( jQuery_lastModified[ s.url ] ) {
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requestHeaders[ "if-modified-since" ] = jQuery_lastModified[ s.url ];
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if ( jQuery.lastModified[ s.url ] ) {
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requestHeaders[ "if-modified-since" ] = jQuery.lastModified[ s.url ];
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}
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if ( jQuery_etag[ s.url ] ) {
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requestHeaders[ "if-none-match" ] = jQuery_etag[ s.url ];
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if ( jQuery.etag[ s.url ] ) {
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requestHeaders[ "if-none-match" ] = jQuery.etag[ s.url ];
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}
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}
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@ -751,9 +563,7 @@ jQuery.extend({
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// If no transport, we auto-abort
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if ( ! transport ) {
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done( 0 , "notransport" );
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} else {
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// Set state as sending
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@ -771,16 +581,13 @@ jQuery.extend({
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}, s.timeout);
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}
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// Try to send
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try {
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transport.send(requestHeaders, done);
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} catch (e) {
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// Propagate exception as error if not done
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if ( status === 1 ) {
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done(0, "error", "" + e);
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jXHR = false;
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// Simply rethrow otherwise
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} else {
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jQuery.error(e);
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@ -879,97 +686,237 @@ jQuery.extend({
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});
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// Base inspection function for prefilters and transports
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function inspectPrefiltersOrTransports( structure , options , originalOptions , dataType , tested ) {
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dataType = dataType || options.dataTypes[0];
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tested = tested || {};
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if ( ! tested[ dataType ] ) {
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tested[ dataType ] = true;
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var list = structure[ dataType ],
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i = 0,
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length = list ? list.length : 0,
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executeOnly = structure === prefilters,
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selected;
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for( ; ( executeOnly || ! selected ) && i < length ; i++ ) {
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selected = list[ i ]( options , originalOptions );
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// If we got redirected to a different dataType,
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// we add it and switch to the corresponding list
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if ( typeof( selected ) === "string" && selected !== dataType ) {
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options.dataTypes.unshift( selected );
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selected = inspectPrefiltersOrTransports(
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structure , options , originalOptions , selected , tested );
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// We always break in order not to continue
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// to iterate in previous list
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break;
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}
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}
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// If we're only executing or nothing was selected
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// we try the catchall dataType
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if ( ! tested[ "*" ] && ( executeOnly || ! selected ) ) {
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selected = inspectPrefiltersOrTransports(
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structure , options , originalOptions , "*" , tested );
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}
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// This will be ignored by ajaxPrefilter
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// so it's safe to return no matter what
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return selected;
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}
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}
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function addToPrefiltersOrTransports( structure , dataTypeExpression , functor ) {
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var dataTypes = dataTypeExpression.split( rspacesAjax ),
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i = 0,
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length = dataTypes.length,
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dataType,
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list,
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placeBefore;
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||||
|
||||
// For each dataType in the dataTypeExpression
|
||||
for( ; i < length ; i++ ) {
|
||||
dataType = dataTypes[ i ];
|
||||
// We control if we're asked to add before
|
||||
// any existing element
|
||||
placeBefore = /^\+/.test( dataType );
|
||||
if ( placeBefore ) {
|
||||
dataType = dataType.substr( 1 );
|
||||
}
|
||||
list = structure[ dataType ] = structure[ dataType ] || [];
|
||||
// then we add to the structure accordingly
|
||||
list[ placeBefore ? "unshift" : "push" ]( functor );
|
||||
}
|
||||
}
|
||||
|
||||
// Base function for both ajaxPrefilter and ajaxTransport
|
||||
function ajaxPrefilterOrTransport( arg0 , arg1 , arg2 ) {
|
||||
function prefiltersOrTransports( structure , arg1 , arg2 , type /* internal */ ) {
|
||||
|
||||
var type = jQuery.type( arg1 ),
|
||||
structure = jQuery.ajaxSettings[ arg0 ],
|
||||
i,
|
||||
length;
|
||||
type = jQuery.type( arg1 );
|
||||
|
||||
// We have an options map so we have to inspect the structure
|
||||
if ( type === "object" ) {
|
||||
|
||||
var options = arg1,
|
||||
originalOptions = arg2,
|
||||
// When dealing with prefilters, we execute only
|
||||
// (no selection so we never stop when a function
|
||||
// returns a non-falsy, non-string value)
|
||||
executeOnly = ( arg0 === "prefilters" ),
|
||||
inspect = function( dataType, tested ) {
|
||||
|
||||
if ( ! tested[ dataType ] ) {
|
||||
|
||||
tested[ dataType ] = true;
|
||||
|
||||
var list = structure[ dataType ],
|
||||
selected;
|
||||
|
||||
for( i = 0, length = list ? list.length : 0 ; ( executeOnly || ! selected ) && i < length ; i++ ) {
|
||||
selected = list[ i ]( options , originalOptions );
|
||||
// If we got redirected to a different dataType,
|
||||
// we add it and switch to the corresponding list
|
||||
if ( typeof( selected ) === "string" && selected !== dataType ) {
|
||||
options.dataTypes.unshift( selected );
|
||||
selected = inspect( selected , tested );
|
||||
// We always break in order not to continue
|
||||
// to iterate in previous list
|
||||
break;
|
||||
}
|
||||
}
|
||||
// If we're only executing or nothing was selected
|
||||
// we try the catchall dataType
|
||||
if ( executeOnly || ! selected ) {
|
||||
selected = inspect( "*" , tested );
|
||||
}
|
||||
// This will be ignored by ajaxPrefilter
|
||||
// so it's safe to return no matter what
|
||||
return selected;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
// Start inspection with current transport dataType
|
||||
return inspect( options.dataTypes[ 0 ] , {} );
|
||||
|
||||
// We have an options map so we have to inspect the structure
|
||||
return inspectPrefiltersOrTransports( structure , arg1 , arg2 );
|
||||
} else {
|
||||
|
||||
// We're requested to add to the structure
|
||||
// Signature is ( dataTypeExpression , function )
|
||||
// with dataTypeExpression being optional and
|
||||
// defaulting to catchAll (*)
|
||||
type = type === "function";
|
||||
|
||||
// defaulting to auto ("*")
|
||||
type = ( type === "function" );
|
||||
if ( type ) {
|
||||
arg2 = arg1;
|
||||
arg1 = undefined;
|
||||
}
|
||||
arg1 = arg1 || "*";
|
||||
|
||||
// We control that the second argument is really a function
|
||||
if ( type || jQuery.isFunction( arg2 ) ) {
|
||||
|
||||
var dataTypes = arg1.split( /\s+/ ),
|
||||
functor = arg2,
|
||||
dataType,
|
||||
list,
|
||||
placeBefore;
|
||||
|
||||
// For each dataType in the dataTypeExpression
|
||||
for( i = 0 , length = dataTypes.length ; i < length ; i++ ) {
|
||||
dataType = dataTypes[ i ];
|
||||
// We control if we're asked to add before
|
||||
// any existing element
|
||||
placeBefore = /^\+/.test( dataType );
|
||||
if ( placeBefore ) {
|
||||
dataType = dataType.substr( 1 );
|
||||
}
|
||||
list = structure[ dataType ] = structure[ dataType ] || [];
|
||||
// then we add to the structure accordingly
|
||||
list[ placeBefore ? "unshift" : "push" ]( functor );
|
||||
}
|
||||
addToPrefiltersOrTransports( structure , arg1 || "*" , arg2 );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Handles responses to an ajax request:
|
||||
// - sets all responseXXX fields accordingly
|
||||
// - finds the right dataType (mediating between content-type and expecting dataType)
|
||||
// - returns the corresponding response
|
||||
function ajaxHandleResponses( s , jXHR , responses ) {
|
||||
|
||||
var contents = s.contents,
|
||||
dataTypes = s.dataTypes,
|
||||
responseFields = s.responseFields,
|
||||
ct,
|
||||
type,
|
||||
finalDataType,
|
||||
firstDataType;
|
||||
|
||||
// Fill responseXXX fields
|
||||
for( type in responseFields ) {
|
||||
if ( type in responses ) {
|
||||
jXHR[ responseFields[ type ] ] = responses[ type ];
|
||||
}
|
||||
}
|
||||
|
||||
// Remove auto dataType and get content-type in the process
|
||||
while( dataTypes[0] === "*" ) {
|
||||
dataTypes.shift();
|
||||
if ( ct === undefined ) {
|
||||
ct = jXHR.getResponseHeader( "content-type" );
|
||||
}
|
||||
}
|
||||
|
||||
// Check if we're dealing with a known content-type
|
||||
if ( ct ) {
|
||||
for ( type in contents ) {
|
||||
if ( contents[ type ] && contents[ type ].test( ct ) ) {
|
||||
dataTypes.unshift( type );
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Check to see if we have a response for the expected dataType
|
||||
if ( dataTypes[0] in responses ) {
|
||||
finalDataType = dataTypes[0];
|
||||
} else {
|
||||
// Try convertible dataTypes
|
||||
for ( type in responses ) {
|
||||
if ( ! dataTypes[0] || s.converters[ type + " " + dataTypes[0] ] ) {
|
||||
finalDataType = type;
|
||||
break;
|
||||
}
|
||||
if ( ! firstDataType ) {
|
||||
firstDataType = type;
|
||||
}
|
||||
}
|
||||
// Or just use first one
|
||||
finalDataType = finalDataType || firstDataType;
|
||||
}
|
||||
|
||||
// If we found a dataType
|
||||
// We add the dataType to the list if needed
|
||||
// and return the corresponding response
|
||||
if ( finalDataType ) {
|
||||
if ( finalDataType !== dataTypes[0] ) {
|
||||
dataTypes.unshift( finalDataType );
|
||||
}
|
||||
return responses[ finalDataType ];
|
||||
}
|
||||
}
|
||||
|
||||
// Chain conversions given the request and the original response
|
||||
function ajaxConvert( s , response ) {
|
||||
|
||||
// Apply the dataFilter if provided
|
||||
if ( s.dataFilter ) {
|
||||
response = s.dataFilter( response , s.dataType );
|
||||
}
|
||||
|
||||
var dataTypes = s.dataTypes,
|
||||
converters = s.converters,
|
||||
i,
|
||||
length = dataTypes.length,
|
||||
tmp,
|
||||
// Current and previous dataTypes
|
||||
current = dataTypes[0],
|
||||
prev,
|
||||
// Conversion expression
|
||||
conversion,
|
||||
// Conversion function
|
||||
conv,
|
||||
// Conversion functions (when text is used in-between)
|
||||
conv1,
|
||||
conv2;
|
||||
|
||||
// For each dataType in the chain
|
||||
for( i = 1 ; i < length ; i++ ) {
|
||||
|
||||
// Get the dataTypes
|
||||
prev = current;
|
||||
current = dataTypes[ i ];
|
||||
|
||||
// If current is auto dataType, update it to prev
|
||||
if( current === "*" ) {
|
||||
current = prev;
|
||||
// If no auto and dataTypes are actually different
|
||||
} else if ( prev !== "*" && prev !== current ) {
|
||||
|
||||
// Get the converter
|
||||
conversion = prev + " " + current;
|
||||
conv = converters[ conversion ] || converters[ "* " + current ];
|
||||
|
||||
// If there is no direct converter, search transitively
|
||||
if ( ! conv ) {
|
||||
conv2 = undefined;
|
||||
for( conv1 in converters ) {
|
||||
tmp = conv1.split( " " );
|
||||
if ( tmp[ 0 ] === prev || tmp[ 0 ] === "*" ) {
|
||||
conv2 = converters[ tmp[ 1 ] + " " + current ];
|
||||
if ( conv2 ) {
|
||||
conv1 = converters[ conv1 ];
|
||||
if ( conv1 === true ) {
|
||||
conv = conv2;
|
||||
} else if ( conv2 === true ) {
|
||||
conv = conv1;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// If we found no converter, dispatch an error
|
||||
if ( ! ( conv || conv2 ) ) {
|
||||
jQuery.error( "No conversion from " + conversion.replace( " " , " to " ) );
|
||||
}
|
||||
// If found converter is not an equivalence
|
||||
if ( conv !== true ) {
|
||||
// Convert with 1 or 2 converters accordingly
|
||||
response = conv ? conv( response ) : conv2( conv1( response ) );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return response;
|
||||
}
|
||||
|
||||
})( jQuery );
|
||||
|
|
|
|||
Loading…
Reference in a new issue