SilverLight

开发平台：
C#

ProxyHandler.ashx：源码内容
							﻿<%@ WebHandler Language="C#" Class="ProxyHandler" %>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
public class ProxyHandler : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        string uri = context.Request.RawUrl.Substring(context.Request.RawUrl.IndexOf("?") + 1);
        if (uri.StartsWith("ping"))
        {
            context.Response.Write("<html><body>Hello ProxyHandler</body></html>");
            return;
        }
            
        System.Net.WebRequest req = System.Net.WebRequest.Create(new Uri(uri));
        req.Method = context.Request.HttpMethod;
        //req.Timeout = 15000;
        // Set body of request for POST requests
        if (context.Request.InputStream.Length > 0)
        {
            byte[] bytes = new byte[context.Request.InputStream.Length];
            context.Request.InputStream.Read(bytes, 0, (int)context.Request.InputStream.Length);
            req.ContentLength = bytes.Length;
            req.ContentType = "application/x-www-form-urlencoded";
            System.IO.Stream outputStream = req.GetRequestStream();
            outputStream.Write(bytes, 0, bytes.Length);
            outputStream.Close();
        }
        System.Net.WebResponse res = req.GetResponse();
        context.Response.ContentType = res.ContentType;
        // Text responses
        if (res.ContentType.Contains("text") || res.ContentType.Contains("application/vnd.ogc"))
        {
            System.IO.StreamReader sr = new System.IO.StreamReader(res.GetResponseStream());
            string strResponse = sr.ReadToEnd();
            context.Response.Write(strResponse);
        }
        // Convert all png images to 32-bit for full alpha (transparency support) in Silverlight    
        else if (res.ContentType.Contains("/png"))
        {
            System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(res.GetResponseStream());            
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            context.Response.BinaryWrite(ms.ToArray());
            
        }else{ 
            
            // Binary responses (non-png images)            
            byte[] b;
            using (System.IO.BinaryReader br = new System.IO.BinaryReader(res.GetResponseStream()))
            {
                b = br.ReadBytes(500000);
                br.Close();
            }
            context.Response.BinaryWrite(b);
        }
        context.Response.End();
    }
    // Necessary for IHttpHandler implementation
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

						