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/*
* jQuery JSONP Core Plugin 2.1.4 (2010-11-17)
*
* http://code.google.com/p/jquery-jsonp/
*
* Copyright (c) 2010 Julian Aubourg
*
* This document is licensed as free software under the terms of the
* MIT License: http://www.opensource.org/licenses/mit-license.php
*/
( function( $ , setTimeout ) {
// ###################### UTILITIES ##
// Noop
function noop() {
}
// Generic callback
function genericCallback( data ) {
lastValue = [ data ];
}
// Add script to document
function appendScript( node ) {
head.insertBefore( node , head.firstChild );
}
// Call if defined
function callIfDefined( method , object , parameters ) {
return method && method.apply( object.context || object , parameters );
}
// Give joining character given url
function qMarkOrAmp( url ) {
return /\?/ .test( url ) ? "&" : "?";
}
var // String constants (for better minification)
STR_ASYNC = "async",
STR_CHARSET = "charset",
STR_EMPTY = "",
STR_ERROR = "error",
STR_JQUERY_JSONP = "_jqjsp",
STR_ON = "on",
STR_ONCLICK = STR_ON + "click",
STR_ONERROR = STR_ON + STR_ERROR,
STR_ONLOAD = STR_ON + "load",
STR_ONREADYSTATECHANGE = STR_ON + "readystatechange",
STR_REMOVE_CHILD = "removeChild",
STR_SCRIPT_TAG = "<script/>",
STR_SUCCESS = "success",
STR_TIMEOUT = "timeout",
// Shortcut to jQuery.browser
browser = $.browser,
// Head element (for faster use)
head = $( "head" )[ 0 ] || document.documentElement,
// Page cache
pageCache = {},
// Counter
count = 0,
// Last returned value
lastValue,
// ###################### DEFAULT OPTIONS ##
xOptionsDefaults = {
//beforeSend: undefined,
//cache: false,
callback: STR_JQUERY_JSONP,
//callbackParameter: undefined,
//charset: undefined,
//complete: undefined,
//context: undefined,
//data: "",
//dataFilter: undefined,
//error: undefined,
//pageCache: false,
//success: undefined,
//timeout: 0,
//traditional: false,
url: location.href
};
// ###################### MAIN FUNCTION ##
function jsonp( xOptions ) {
// Build data with default
xOptions = $.extend( {} , xOptionsDefaults , xOptions );
// References to xOptions members (for better minification)
var completeCallback = xOptions.complete,
dataFilter = xOptions.dataFilter,
callbackParameter = xOptions.callbackParameter,
successCallbackName = xOptions.callback,
cacheFlag = xOptions.cache,
pageCacheFlag = xOptions.pageCache,
charset = xOptions.charset,
url = xOptions.url,
data = xOptions.data,
timeout = xOptions.timeout,
pageCached,
// Abort/done flag
done = 0,
// Life-cycle functions
cleanUp = noop;
// Create the abort method
xOptions.abort = function() {
! done++ && cleanUp();
};
// Call beforeSend if provided (early abort if false returned)
if ( callIfDefined( xOptions.beforeSend, xOptions , [ xOptions ] ) === false || done ) {
return xOptions;
}
// Control entries
url = url || STR_EMPTY;
data = data ? ( (typeof data) == "string" ? data : $.param( data , xOptions.traditional ) ) : STR_EMPTY;
// Build final url
url += data ? ( qMarkOrAmp( url ) + data ) : STR_EMPTY;
// Add callback parameter if provided as option
callbackParameter && ( url += qMarkOrAmp( url ) + encodeURIComponent( callbackParameter ) + "=?" );
// Add anticache parameter if needed
! cacheFlag && ! pageCacheFlag && ( url += qMarkOrAmp( url ) + "_" + ( new Date() ).getTime() + "=" );
// Replace last ? by callback parameter
url = url.replace( /=\?(&|$)/ , "=" + successCallbackName + "$1" );
// Success notifier
function notifySuccess( json ) {
! done++ && setTimeout( function() {
cleanUp();
// Pagecache if needed
pageCacheFlag && ( pageCache [ url ] = { s: [ json ] } );
// Apply the data filter if provided
dataFilter && ( json = dataFilter.apply( xOptions , [ json ] ) );
// Call success then complete
callIfDefined( xOptions.success , xOptions , [ json , STR_SUCCESS ] );
callIfDefined( completeCallback , xOptions , [ xOptions , STR_SUCCESS ] );
} , 0 );
}
// Error notifier
function notifyError( type ) {
! done++ && setTimeout( function() {
// Clean up
cleanUp();
// If pure error (not timeout), cache if needed
pageCacheFlag && type != STR_TIMEOUT && ( pageCache[ url ] = type );
// Call error then complete
callIfDefined( xOptions.error , xOptions , [ xOptions , type ] );
callIfDefined( completeCallback , xOptions , [ xOptions , type ] );
} , 0 );
}
// Check page cache
pageCacheFlag && ( pageCached = pageCache[ url ] )
? ( pageCached.s ? notifySuccess( pageCached.s[ 0 ] ) : notifyError( pageCached ) )
:
// Initiate request
setTimeout( function( script , scriptAfter , timeoutTimer ) {
if ( ! done ) {
// If a timeout is needed, install it
timeoutTimer = timeout > 0 && setTimeout( function() {
notifyError( STR_TIMEOUT );
} , timeout );
// Re-declare cleanUp function
cleanUp = function() {
timeoutTimer && clearTimeout( timeoutTimer );
script[ STR_ONREADYSTATECHANGE ]
= script[ STR_ONCLICK ]
= script[ STR_ONLOAD ]
= script[ STR_ONERROR ]
= null;
head[ STR_REMOVE_CHILD ]( script );
scriptAfter && head[ STR_REMOVE_CHILD ]( scriptAfter );
};
// Install the generic callback
// (BEWARE: global namespace pollution ahoy)
window[ successCallbackName ] = genericCallback;
// Create the script tag
script = $( STR_SCRIPT_TAG )[ 0 ];
script.id = STR_JQUERY_JSONP + count++;
// Set charset if provided
if ( charset ) {
script[ STR_CHARSET ] = charset;
}
// Callback function
function callback( result ) {
( script[ STR_ONCLICK ] || noop )();
result = lastValue;
lastValue = undefined;
result ? notifySuccess( result[ 0 ] ) : notifyError( STR_ERROR );
}
// IE: event/htmlFor/onclick trick
// One can't rely on proper order for onreadystatechange
// We have to sniff since FF doesn't like event & htmlFor... at all
if ( browser.msie ) {
script.event = STR_ONCLICK;
script.htmlFor = script.id;
script[ STR_ONREADYSTATECHANGE ] = function() {
/loaded|complete/.test( script.readyState ) && callback();
};
// All others: standard handlers
} else {
script[ STR_ONERROR ] = script[ STR_ONLOAD ] = callback;
browser.opera ?
// Opera: onerror is not called, use synchronized script execution
( ( scriptAfter = $( STR_SCRIPT_TAG )[ 0 ] ).text = "jQuery('#" + script.id + "')[0]." + STR_ONERROR + "()" )
// Firefox: set script as async to avoid blocking scripts (3.6+ only)
: script[ STR_ASYNC ] = STR_ASYNC;
;
}
// Set source
script.src = url;
// Append main script
appendScript( script );
// Opera: Append trailing script
scriptAfter && appendScript( scriptAfter );
}
} , 0 );
return xOptions;
}
// ###################### SETUP FUNCTION ##
jsonp.setup = function( xOptions ) {
$.extend( xOptionsDefaults , xOptions );
};
// ###################### INSTALL in jQuery ##
$.jsonp = jsonp;
} )( jQuery , setTimeout );
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