Function ajaxHandleResponses

2.0.3/2.0.3.js:7583–7634

( s, jqXHR, responses )

 * - returns the corresponding response
 */
    function ajaxHandleResponses( s, jqXHR, responses ) {

        var ct, type, finalDataType, firstDataType,
            contents = s.contents,
            dataTypes = s.dataTypes;

        // Remove auto dataType and get content-type in the process
        while( dataTypes[ 0 ] === "*" ) {
            dataTypes.shift();
            if ( ct === undefined ) {
                ct = s.mimeType || jqXHR.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
 * Also sets the responseXXX fields on the jqXHR instance