利用WebClient 制作调试Http的post 和 get 工具

有时候需要看网页的提交效果，但需要改变一些自己的参数，于是想到了做个这样的工具

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Collections.Specialized;
using System.Text.RegularExpressions;

namespace HTTPGetPost
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnGo_Click(object sender, EventArgs e)
        {


            if (rdbGet.Checked)
            {
                txtRe.Text = GetData(txtUrl.Text, txtHead.Text);
            }
            else
            {

                txtRe.Text = GetData(txtUrl.Text, txtHead.Text,txtPost.Text );
            }
            

        }
        private string GetData(string url, string head,string post)
        {
            WebClient wc = AddHead(txtHead.Text);
            byte[] re = wc.UploadValues(url, "POST", PostData(post));
            return EncodeHtml(re);
        }

        private string  GetData(string url, string head)
        {
            WebClient wc = AddHead(txtHead.Text);

            byte[] re = wc.DownloadData(url);
            
            return EncodeHtml(re);
        }
        private WebClient AddHead(string head)
        {
            WebClient wc = new WebClient();
            string[] p = head.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
            for (int i = 0; i < p.Length; i++)
            {
                int k = p[i].IndexOf("\t");
                
                wc.Headers.Add (p[i].Substring(0, k), p[i].Substring(k + 1, p[i].Length - k - 1));
            }
            wc.Credentials = CredentialCache.DefaultCredentials;
            return wc;

        }
        private NameValueCollection PostData(string poststr)
        {
            NameValueCollection PostVars = new NameValueCollection();
            string[] p=poststr.Split (new string[]{"\r\n"},StringSplitOptions.RemoveEmptyEntries);

            for (int i = 0; i < p.Length; i++)
            { 
                int k=p[i].IndexOf ("\t");
                PostVars.Add (p[i].Substring (0,k),p[i].Substring (k+1,p[i].Length -k -1));
            }
            return PostVars;         

        }
        private string EncodeHtml(byte[] myDataBuffer)
        {
            string strWebData = Encoding.UTF8.GetString(myDataBuffer);
            Match charSetMatch = Regex.Match(strWebData, "(?<=<meta.*charset=).*?(?=\")", RegexOptions.IgnoreCase | RegexOptions.Multiline);
            if (charSetMatch.Value == "")
            {
                charSetMatch = Regex.Match(strWebData, "(?<=<meta.*charset=).*?(?=;)", RegexOptions.IgnoreCase | RegexOptions.Multiline);
            }
            if (charSetMatch.Value == "")
                return strWebData;
            else
            {
                return System.Text.Encoding.GetEncoding(charSetMatch.Value).GetString(myDataBuffer);
            }
       }

    }
}