Created
July 26, 2008 02:55
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Parse Query String From Script Element's Src Attribute
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/** | |
* Helper object to parse the query string variables from | |
* <script> element's src attribute. | |
* | |
* For example, in test.html: | |
* | |
* <script src="test.js?name=value"></script> | |
* | |
* and in test.js, you can get query as name/value pairs: | |
* | |
* var queries = new ScriptQuery('test.js').parse(); | |
* for (var name in queries) { | |
* var values = queries[name]; // property is Array instance. | |
* ... | |
* } | |
* | |
* If you would like to avoid array manipulation. | |
* ScriptQuery also provides flatten method, which returns | |
* only first value for each properties. | |
* | |
* var queries = new ScriptQuery('test.js').flatten(); | |
* for (var name in queries) { | |
* alert(queries[name]); // property is simply string | |
* } | |
*/ | |
var ScriptQuery = function(scriptPath) { | |
this.scriptPath = scriptPath; | |
} | |
ScriptQuery.prototype = { | |
get: function() { | |
var srcRegex = new RegExp(this.scriptPath.replace('.', '\\.') + '(\\?.*)?$'); | |
var scripts = document.getElementsByTagName("script"); | |
for (var i = 0; i < scripts.length; i++) { | |
var script = scripts[i]; | |
if (script.src && script.src.match(srcRegex)) { | |
var query = script.src.match(/\?([^#]*)(#.*)?/); | |
return !query ? '' : query[1]; | |
} | |
} | |
return ''; | |
}, | |
parse: function() { | |
var result = {}; | |
var query = this.get(); | |
var components = query.split('&'); | |
for (var i = 0; i < components.length; i++) { | |
var pair = components[i].split('='); | |
var name = pair[0], value = pair[1]; | |
if (!result[name]) result[name] = []; | |
// decode | |
if (!value) { | |
value = 'true'; | |
} else { | |
try { | |
value = decodeURIComponent(value); | |
} catch (e) { | |
value = unescape(value); | |
} | |
} | |
// MacIE way | |
var values = result[name]; | |
values[values.length] = value; | |
} | |
return result; | |
}, | |
flatten: function() { | |
var queries = this.parse(); | |
for (var name in queries) { | |
queries[name] = queries[name][0]; | |
} | |
return queries; | |
}, | |
toString: function() { | |
return 'ScriptQuery [path=' + this.scriptPath + ']'; | |
} | |
} |
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