HTTP网络请求

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;

namespace DEMO
{
    public class Http_Demo
    {

        private static String LOG_TAG = "HTTPUtils";                        //标记
        private static int CONNECT_TIME_OUT = 5000;                         //超时
        private static String HEADER_CONTENT_TYPE = "Content-Type";         //链接类型
        private static String HEADER_CONTENT_LENGTH = "Content-Length";     //链接长度
        private static String DEFAULT_PARAMS_ENCODING = "UTF-8";            //文本格式

        private System.Net.HttpWebRequest Request = null;
        private System.Net.WebResponse Response = null;
        private System.IO.Stream Stream = null;
        private System.IO.StreamReader Read = null;
        private System.Byte[] Byte = null;               //本身就是数组
        private System.Text.Encoding Encode = System.Text.Encoding.UTF8;
        private System.Text.RegularExpressions.Match Match = null;

        /// <summary>   
        /// 公开属性   
        /// </summary>   
        public System.Net.WebProxy Proxy = new System.Net.WebProxy();

        public string IPFor = null;
        public bool HideInfo = false;

        /// <summary>   
        /// 初始化Request   
        /// </summary>   
        /// <param name="Request">对象</param>   
        private void init_Request(ref System.Net.HttpWebRequest Request)
        {
            //终端信息   
            Request.Accept =
                "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,image/png,application/java-archive,application/java,application/x-java-archive,text/vnd.sun.j2me.app-descriptor,application/vnd.oma.drm.message,application/vnd.oma.drm.content,application/vnd.oma.dd+xml,application/vnd.oma.drm.rights+xml,application/vnd.oma.drm.rights+wbxml,application/x-nokia-widget,text/x-opml,application/vnd.nokia.headwrapper,*/*;q=0.5";
            Request.Headers.Add("Accept-Charset", "iso-8859-1,utf-8;q=0.7,*;q=0.7");
            Request.Headers.Add("Accept-Language", "zh-cn, zh;q=1.0,en;q=0.5,en;q=0.5,en;q=0.5");
            Request.Headers.Add("Accept-Encoding", "gzip, deflate, x-gzip, identity; q=0.9");
            Request.Headers.Add("X-Nokia-MusicShop-Version", "11.0842.9");
            //承载方式   
            Request.Headers.Add("X-Nokia-MusicShop-Bearer", "GPRS/3G");
            Request.Headers.Add("X-Nokia-CONNECTION_MODE", "TCP");
            Request.Headers.Add("X-Nokia-BEARER", "3G");
            Request.Headers.Add("x-up-bear-type", "GPRS/EDGE");
            Request.Headers.Add("X-Up-Bearer-Type", "GPRS");
            //GGSN信息   
            Request.Headers.Add("x-source-id", "GZGGSN1101BEr");
            Request.Headers.Add("Client-IP", "211.139.151.74");
            if (IPFor != null) Request.Headers.Add("x-forwarded-for", IPFor);
            //网关信息   
            Request.Headers.Add("Via", "WTP/1.1 192.168.13.33 (Nokia WAP Gateway 4.1/CD1/ECD13_E/4.1.05)");
            Request.Headers.Add("X-Nokia-gateway-id", "NWG/4.1/Build4.1.05");
            //目标主机   
            //Request.Headers.Add("X-Online-Host", Request.Host);   
            //重要信息   
            if (!HideInfo)
            {
                Request.UserAgent =
                    "Mozilla/5.0 (SymbianOS/9.4; U; Series60/5.0 Nokia5230/10.0.055; Profile/MIDP-2.1 Configuration/CLDC-1.1 ) AppleWebKit/413 (KHTML, like Gecko) Safari/413";
                Request.Headers.Add("x-wap-profile", "http://nds1.nds.nokia.com/uaprof/Nokia5230r100-3G.xml");
                if (IPFor != null)
                {
                    Request.Headers.Add("x-nokia-ipaddress", IPFor);
                }
            }
            //自动重定向   
            Request.AllowAutoRedirect = false;
            //代理设置   
            if (Proxy.Address != null)
            {
                Request.Proxy = Proxy;
            }
            //其它杂项   
            Request.KeepAlive = false;
            Request.Timeout = 8000;
        }

        public string get_Internet(string url, string cookie = null)
        {
            try
            {
                Request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
                url = null;
                if (Request != null)
                {
                    init_Request(ref Request);
                    if (cookie != null) { Request.Headers.Add("Cookie", cookie); }
                    using (Response = Request.GetResponse())
                    {
                        Stream = Response.GetResponseStream();
                        using (Read = new System.IO.StreamReader(Stream, System.Text.Encoding.UTF8))
                        {
                            url = Read.ReadToEnd();
                        }
                        Read = null;
                        Stream = null;
                    }
                    Response = null;
                    Request.Abort();
                    Request = null;
                }
                return url;
            }
            catch (Exception ex)
            {
                //Error.Write(ref ex);   
                return null;
            }
        }

        public string post_Internet(string url, Dictionary<String, String> reqParams)
        {
            string data = BuildHttpGetURL(url, reqParams);
            Console.WriteLine(data);


            string result = null;
            try
            {
                Request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
                if (Request != null)
                {
                    init_Request(ref Request);                             //请求初始化

                    Request.Method = "POST";                              //增加自己的属性
                    Request.ServicePoint.Expect100Continue = false;

                    Request.ContentType = getBodyContentType();

                    Byte = Encode.GetBytes(data);
                    Request.ContentLength = Byte.Length;

                    using (Stream = Request.GetRequestStream())
                    {
                        Stream.Write(Byte, 0, Byte.Length);
                    }
                    Stream = null;
                    Byte = null;
                    result = null;
                    using (Response = Request.GetResponse())
                    {
                        Stream = Response.GetResponseStream();
                        using (Read = new System.IO.StreamReader(Stream))
                        {
                            result = Read.ReadToEnd();       
                        }
                        Read = null;
                        Stream = null;
                    }
                    Response = null;
                    Request.Abort();
                    Request = null;
                }
                return result;
            }
            catch (Exception ex)
            {
                //Error.Write(ref ex);   
                return null;
            }
        }

        private static String getParamsEncoding()
        {
            return DEFAULT_PARAMS_ENCODING;
        }

        private static String getBodyContentType() //网络链接类型
        {
            return "application/x-www-form-urlencoded; charset=" + getParamsEncoding();
        }

        string BuildHttpGetURL(string baseURL, Dictionary<string, string> paramDict) //转化成为了请求的格式
        {
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            sb.Append(baseURL);
            if (null != paramDict)
            {
                sb.Append("?");//添加符号
                foreach (var pair in paramDict)
                {
                    //TODO: urlencode
                    sb.Append("&");
                    sb.Append(pair.Key);
                    sb.Append("=");
                    sb.Append(pair.Value);       
                }
            }
            return sb.ToString();
        }
    }
}