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Flex中如何打开网页及Get/Post数据 转

flash中打开网页,以及用GET/POST二种方式向服务端发送数据

01//按下按钮,打开网页
02btnOpen.addEventListener(MouseEvent.CLICK,
03 function(){
04 navigateToURL(new URLRequest("http://www.g.cn/search?hl=zh-CN&q=" + encodeURIComponent(txtId.text)),"_blank");
05});
06 
07//以Get方式发送数据(发送就完事,不会理会服务端是否响应)
08btnSend.addEventListener(MouseEvent.CLICK,
09 function(){
10 sendToURL(new URLRequest("/default.aspx?q=" + encodeURIComponent(txtId.text)));
11});
12btnPost.addEventListener(MouseEvent.CLICK,fnPostData);
13 
14//以Post方式发送数据(同样:发送就完事,不会理会服务端是否响应)
15function fnPostData(e:MouseEvent) {
16 var _urlReq:URLRequest = new URLRequest();
17 _urlReq.url = "/default.aspx";
18 _urlReq.method = URLRequestMethod.POST;
19 var _data:URLVariables = new URLVariables();
20 _data.q = "菩提树下的杨过"; //即传递 q = 菩提树下的杨过,注:经测试,Flash会自动对传递的数据做encodeURIComponent处理,所以此外不能再加encodeURIComponent,否则就是二次编码了
21 _urlReq.data = http://www.mamicode.com/_data;
22 sendToURL(_urlReq);
23}

 

 

1protected void Page_Load(object sender, EventArgs e)
2{
3 string q = Request["q"];
4 if (!string.IsNullOrEmpty(q)) {
5  string _file = Server.MapPath("~/log.txt");
6  File.AppendAllText(_file,q + "\t" + Request.HttpMethod + "\t" + DateTime.Now + Environment.NewLine);
7 }
8}

如果发送了数据后,还要响应服务端的结果(比如取得服务端的返回值,再继续到Flash中处理),Flash中可这样写:

01var loader:URLLoader = new URLLoader();
02configureListeners(loader);
03var request:URLRequest=new URLRequest("/FlashHander.ashx?q=" + encodeURIComponent("菩提树下的杨过"));
04try {
05 loader.load(request);
06} catch (error:Error) {
07 trace("Unable to load requested document.");
08}
09 
10//定义各种情况的回调函数
11function configureListeners(dispatcher:IEventDispatcher):void {
12 dispatcher.addEventListener(Event.COMPLETE, completeHandler);
13 dispatcher.addEventListener(Event.OPEN, openHandler);
14 dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
15 dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
16 dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler);
17 dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
18}
19 
20//加载完成时,将触发
21function completeHandler(event:Event):void {
22 var loader:URLLoader=URLLoader(event.target);
23 trace("completeHandler: " + loader.data);
24 lblReceive.text = loader.data; //本例中,服务端返回: msg=Hello World&Method=GET&q=菩提树下的杨过
25 var vars:URLVariables=new URLVariables(loader.data);
26 trace("The Method is " + vars.Method); //服务端返回的字符串中如果有 Method=xxx 这样的字符,则Flash中可以直接用vars.Method进行访问
27}
28 
29//刚开始请求时,将触发
30function openHandler(event:Event):void {
31 trace("openHandler: " + event);
32}
33 
34//下载进度发生变化时,将触发(可利用这个做加载进度条)
35function progressHandler(event:ProgressEvent):void {
36 trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
37}
38 
39//因安全原因出现错误时,将触发
40function securityErrorHandler(event:SecurityErrorEvent):void {
41 trace("securityErrorHandler: " + event);
42}
43 
44//http请求状态变化时,将触发
45function httpStatusHandler(event:HTTPStatusEvent):void {
46 trace("httpStatusHandler: " + event);
47}
48 
49//io错误时,将触发
50function ioErrorHandler(event:IOErrorEvent):void {
51 trace("ioErrorHandler: " + event);
52}


服务端FlashHander.ashx可以这样处理:
注意:返回的字符串格式为 name1=value1&name2=value2&name3=value3... 如果name和value中本身包含"="与"&",请注意用其它字符替换掉

01/// <summary>
02/// Summary description for FlashHander
03/// </summary>
04public class FlashHander : IHttpHandler
05{
06 public void ProcessRequest(HttpContext context)
07 {
08  context.Response.ContentType = "text/plain";
09  context.Response.Write("msg=Hello World&Method=" + context.Request.HttpMethod + "&q=" + context.Request["q"]);
10 }
11 public bool IsReusable
12 {
13  get
14  {
15    return false;
16  }
17 }

18}