jsgi-client.js

/**
* HTTP Client using the JSGI standard objects
*/
var defer = require("promised-io/promise").defer;

exports.request = function(request){
	var xhr = new XMLHttpRequest();
	xhr.open(request.method || "GET", 
		request.uri || // allow request.uri to shortcut creating a URL from all the various parts 
		(request.scheme + "://" + request.serverName + ":" + request.serverPort + request.pathInfo + (request.queryString ? '?' + request.queryString : '')), true);
	for(var i in request.headers){
		xhr.setRequestHeader(i, request.headers[i]);
	}
	var deferred = defer();
	var response;
	var lastUpdate;
	xhr.onreadystatechange = function(){
		if(xhr.readyState == 4 || xhr.readyState == 3){
			if(!response){
				response = {
					body: [xhr.responseText],
					status: xhr.status,
					headers: {}
				};
				lastUpdate = xhr.responseText.length;
				var headers = xhr.getAllResponseHeaders();
				headers = headers.split(/\n/);
				for(var i = 0; i < headers.length; i++){
					var nameValue = headers[i].split(": ", 2);
					if(nameValue){
						var name = nameValue[0];
						response.headers[name.toLowerCase()] = xhr.getResponseHeader(name);
					}
				}
			}
			else{
				response.body = [xhr.responseText];
				lastUpdate = xhr.responseText.length;
			}
			if(xhr.readyState == 4){
				deferred.resolve(response);
			}
			else{
				deferred.progress(response);
			}
		}
	}
	xhr.send(request.body && request.body.toString());
	return deferred.promise;
}