106 lines
3.2 KiB
JavaScript
106 lines
3.2 KiB
JavaScript
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/*
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This program is free software. It comes without any warranty, to
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the extent permitted by applicable law. You can redistribute it
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and/or modify it under the terms of the Do What The Fuck You Want
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To Public License, Version 2, as published by Sam Hocevar. See
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http://sam.zoy.org/wtfpl/COPYING for more details.
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*/
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/*
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httpobj: javascript class using XMLHttpRequest to send and retrieve info.
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See /httpobj to get an example of the usage.
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*/
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//v.1.0
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function httpobj() {
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// Get XMLHttpRequest object
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this.obj = this.getobj()
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if (!this.obj) {
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alert('Your browser does not support HTTP Requests! Get a new one (a browser, that is. Not a request).')
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delete this
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return false
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}
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// Define default variables
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this.param = {}
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this.method = 'POST'
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// Fix for later on
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this.obj.topelem = this
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}
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httpobj.prototype.getobj = function() {
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// Try to get the XMLHttpRequest object
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try { return new XMLHttpRequest() } catch (e) {}
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try { return new ActiveXObject('Msxml2.XMLHTTP.6.0') } catch(e) {}
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try { return new ActiveXObject('Msxml2.XMLHTTP.3.0') } catch(e) {}
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try { return new ActiveXObject('Msxml2.XMLHTTP') } catch(e) {}
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try { return new ActiveXObject('Microsoft.XMLHTTP') }
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catch(e) {
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return false // FAILURE
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}
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}
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httpobj.prototype.send = function() {
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/*
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send(): Sends parametres (param) to url (url) and sets up function to
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react on retrievement
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*/
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if (!this.url) {
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// Exit function if either url or the function to be called is undefined
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delete this
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return false
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}
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// Transform param into string type ?foo=bar&hmm=aha
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this.text_params = ''
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if (this.param) {
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for (var x in this.param)
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this.text_params += '&' + x + '=' + this.param[x]
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this.text_params = this.text_params.substr(1)
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}
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if (this.method.toLowerCase() == 'get') {
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// In case of GET method, use '?'
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var after_url
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if (!this.param)
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after_url = ''
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else
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after_url = '?' + this.text_params
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this.obj.open('GET', this.url + after_url, true)
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this.obj.send(null)
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}
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else {
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// In case of POST method, use RequestHeader
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this.obj.open('POST', this.url, true)
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this.obj.setRequestHeader('Content-type', 'application/x-www-form-urlencoded')
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this.obj.setRequestHeader('Content-length', this.text_params.length)
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this.obj.setRequestHeader('Connection', 'close')
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this.obj.send(this.text_params)
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}
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// What to do when something happens
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this.obj.onreadystatechange = function() {
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// Only do something when it's complete
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if (this.readyState == 4 || this.readyState == 'complete') {
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// Define 3 variables to be used with the user-defined function (func)
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var text, params, state
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text = this.responseText
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params = this.topelem.param // this.topelem = this.obj.topelem = this
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// State 0 is good, state 1 is bad
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state = 0
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if (this.status != 200) {
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state = 1
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text = ''
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}
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// Call user-defined function
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if (this.topelem.func)
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eval(this.topelem.func)
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delete this
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}
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}
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return true // It has a chance of working..
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}
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