110 lines
4.4 KiB
TypeScript
110 lines
4.4 KiB
TypeScript
//TODO add support for IE8-9 CORS via XDomain
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//TODO better error handling, ala exceptions
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/**
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* @namespace Typertext
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* @module Http
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*/
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module Typertext.Http {
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export class HttpRequest implements Typertext.GenericRequest<HttpResponseHandler> {
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/**
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* The class that everything that calls an http(s) server should use and build on top of using callbacks
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*
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* @class HttpRequest
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* @extends GenericRequest
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*
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* @author Kegan Myers <kegan@keganmyers.com>
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* @version 0.3.0
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* @constructor
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*/
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constructor() {
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}
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/**
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* A convenience method for simply calling a GET
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*
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* @param {HttpUrl} request
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* @param {HttpResponseHandler} callback
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*/
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public Get(request:HttpUrl, callback:HttpResponseHandler):void {
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this.RawRequest(HttpMethod.GET, request, {}, callback);
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}
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/**
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* A convenience method for simply calling a POST
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*
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* @param {HttpUrl} request
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* @param {HttpPostData} postData
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* @param {HttpResponseHandler} callback
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*/
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public Post(request:HttpUrl, postData:HttpPostData, callback:HttpResponseHandler):void {
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this.RawRequest(HttpMethod.POST, request, postData, callback);
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}
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/**
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* This is a method that calls against a specified HTTP server and does basic handling of responses, with no
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* data manipulation
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*
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* @param {HttpMethod} method
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* @param {HttpUrl} request
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* @param {HttpPostData} postData
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* @param {HttpResponseHandler} callback
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*/
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public RawRequest(method:HttpMethod, request:HttpUrl, postData:HttpPostData = {}, callback:HttpResponseHandler = (c)=> {
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}):void {
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var noop = (i:string)=>{
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return "";
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};
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//Create a XHR
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var xhr = new XMLHttpRequest();
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//And let us know when it does something
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xhr.onreadystatechange = ()=> {
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//If the request is complete
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if (xhr.readyState == 4) {
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//Prepare a getter for the header
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var getHeader = (name:string):string => {
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return xhr.getResponseHeader(name);
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};
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//Check the status
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if (xhr.status == 200) {
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//And either succeed
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callback(new HttpResponse(HttpResponseStatus.success, getHeader, xhr.status, xhr.responseText));
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} else if (xhr.status >= 400 && xhr.status < 500) {
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//Or fail miserably
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throw new HttpException("The server returned an error response state", xhr.status, new HttpResponse(HttpResponseStatus.clientError, getHeader, xhr.status, xhr.responseText));
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} else if (xhr.status >= 500 && xhr.status < 600) {
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//Again
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throw new HttpException("The server returned an error response state", xhr.status, new HttpResponse(HttpResponseStatus.serverError, getHeader, xhr.status, xhr.responseText));
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} else {
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//And again
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throw new HttpException("An unknown error has occurred", -2, new HttpResponse(HttpResponseStatus.unknownError, getHeader, xhr.status, xhr.responseText));
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}
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}
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};
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//Or if it times out
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xhr.ontimeout = () => {
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//And make a big deal of the failing
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throw new HttpException("The server took too long to respond to our request", -1, new HttpResponse(HttpResponseStatus.timeout, noop, -1, ""));
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};
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//Now connect
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xhr.open(HttpMethod[method], request.ToString(), true);
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//And either send
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if (method == HttpMethod.GET) {
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//A get request
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xhr.send();
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return;
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}
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//Or set the content-type
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xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
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//And send the post-data to the server
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xhr.send(HttpUrl.UrlEncodeObject(postData));
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}
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}
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} |