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// JQuery URL Parser
// Written by Mark Perkins, [email protected]
// License: http://unlicense.org/ (i.e. do what you want with it!)
jQuery.url = function()
{
var segments = {};
var parsed = {};
/**
* Options object. Only the URI and strictMode values can be changed via the setters below.
*/
var options = {
url : window.location, // default URI is the page in which the script is running
strictMode: false, // 'loose' parsing by default
key: ["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"], // keys available to query
q: {
name: "queryKey",
parser: /(?:^|&)([^&=]*)=?([^&]*)/g
},
parser: {
strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/, //less intuitive, more accurate to the specs
loose: /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/ // more intuitive, fails on relative paths and deviates from specs
}
};
/**
* Deals with the parsing of the URI according to the regex above.
* Written by Steven Levithan - see credits at top.
*/
var parseUri = function()
{
str = decodeURI( options.url );
var m = options.parser[ options.strictMode ? "strict" : "loose" ].exec( str );
var uri = {};
var i = 14;
while ( i-- ) {
uri[ options.key[i] ] = m[i] || "";
}
uri[ options.q.name ] = {};
uri[ options.key[12] ].replace( options.q.parser, function ( $0, $1, $2 ) {
if ($1) {
uri[options.q.name][$1] = $2;
}
});
return uri;
};
/**
* Returns the value of the passed in key from the parsed URI.
*
* @param string key The key whose value is required
*/
var key = function( key )
{
if ( jQuery.isEmptyObject(parsed) )
{
setUp(); // if the URI has not been parsed yet then do this first...
}
if ( key == "base" )
{
if ( parsed.port !== null && parsed.port !== "" )
{
return parsed.protocol+"://"+parsed.host+":"+parsed.port+"/";
}
else
{
return parsed.protocol+"://"+parsed.host+"/";
}
}
return ( parsed[key] === "" ) ? null : parsed[key];
};
/**
* Returns the value of the required query string parameter.
*
* @param string item The parameter whose value is required
*/
var param = function( item )
{
if ( jQuery.isEmptyObject(parsed) )
{
setUp(); // if the URI has not been parsed yet then do this first...
}
return ( parsed.queryKey[item] === null ) ? null : parsed.queryKey[item];
};
/**
* 'Constructor' (not really!) function.
* Called whenever the URI changes to kick off re-parsing of the URI and splitting it up into segments.
*/
var setUp = function()
{
parsed = parseUri();
getSegments();
};
/**
* Splits up the body of the URI into segments (i.e. sections delimited by '/')
*/
var getSegments = function()
{
var p = parsed.path;
segments = []; // clear out segments array
segments = parsed.path.length == 1 ? {} : ( p.charAt( p.length - 1 ) == "/" ? p.substring( 1, p.length - 1 ) : path = p.substring( 1 ) ).split("/");
};
return {
/**
* Sets the parsing mode - either strict or loose. Set to loose by default.
*
* @param string mode The mode to set the parser to. Anything apart from a value of 'strict' will set it to loose!
*/
setMode : function( mode )
{
options.strictMode = mode == "strict" ? true : false;
return this;
},
/**
* Sets URI to parse if you don't want to to parse the current page's URI.
* Calling the function with no value for newUri resets it to the current page's URI.
*
* @param string newUri The URI to parse.
*/
setUrl : function( newUri )
{
options.url = newUri === undefined ? window.location : newUri;
setUp();
return this;
},
/**
* Returns the value of the specified URI segment. Segments are numbered from 1 to the number of segments.
* For example the URI http://test.com/about/company/ segment(1) would return 'about'.
*
* If no integer is passed into the function it returns the number of segments in the URI.
*
* @param int pos The position of the segment to return. Can be empty.
*/
segment : function( pos )
{
if ( jQuery.isEmptyObject(parsed) )
{
setUp(); // if the URI has not been parsed yet then do this first...
}
if ( pos === undefined )
{
return segments.length;
}
return ( segments[pos] === "" || segments[pos] === undefined ) ? null : segments[pos];
},
attr : key, // provides public access to private 'key' function - see above
param : param // provides public access to private 'param' function - see above
};
}();
