using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Web;
namespace Common
{
public class HttpUtil
{
private const string UserAgent = @"Mozilla/5.0 (Windows; Windows NT 6.1) AppleWebKit/534.23 (KHTML, like Gecko) Chrome/11.0.686.3 Safari/534.23";
private readonly CookieContainer _cookie = new CookieContainer();
public string Url { get; set; }
public HttpUtil() { }
public HttpUtil(string url)
{
Url = url;
}
/// <summary>
/// GET请求
/// </summary>
/// <param name="data">需要请求的数据</param>
public string Get(IDictionary<string, string> data)
{
ServicePointManager.DefaultConnectionLimit = 512;
var str = data == null ? string.Empty : data.Keys.Aggregate(string.Empty, (current, key) => current + string.Format("{0}={1}&", key, System.Web.HttpUtility.UrlEncode(data[key]))).TrimEnd(new[] { '&' });
if (string.IsNullOrEmpty(Url)) return string.Empty;
var url = Url.TrimEnd(new[] { '?' });
url += (url.IndexOf('?') > 0 ? "&" : "?") + str;
var request = (HttpWebRequest)WebRequest.Create(url);
//request.ServicePoint.SetTcpKeepAlive(true, 6000000, 100000);
request.KeepAlive = true;
request.CookieContainer = _cookie;
request.UserAgent = UserAgent;
request.Method = "GET";
request.Timeout = 3000;
try
{
//request.ServicePoint.ConnectionLeaseTimeout = 0;
using (var response = (HttpWebResponse)request.GetResponse())
{
var responseStream = response.GetResponseStream();
if (responseStream == null) return string.Empty;
try
{
using (var sr = new StreamReader(responseStream))
{
//response.Close();
return sr.ReadToEnd();
}
}
finally
{
response.Close();
}
}
}
catch
{
return string.Empty;
}
}
/// <summary>
/// POST请求
/// </summary>
/// <param name="data">POST数据</param>
/// <param name="refer">引用地址</param>
/// <returns></returns>
public string Post(IDictionary<string, string> data, string refer = "")
{
if (string.IsNullOrEmpty(Url)) return string.Empty;
var str = data == null ? string.Empty : data.Keys.Aggregate(string.Empty, (current, key) => current + string.Format("{0}={1}&", key, data[key])).TrimEnd(new[] { '&' });
var request = (HttpWebRequest)WebRequest.Create(Url);
request.ServicePoint.ConnectionLimit = int.MaxValue;
request.CookieContainer = _cookie;
request.UserAgent = UserAgent;
request.KeepAlive = true;
request.Method = "POST";
request.Referer = refer;
request.Timeout = 3000;
var postBytes = Encoding.ASCII.GetBytes(str);
request.ContentType = "application/x-www-form-urlencoded; charset=UTF8";
request.ContentLength = postBytes.Length;
try
{
using (var requestStream = request.GetRequestStream())
{
requestStream.Write(postBytes, 0, postBytes.Length);
}
using (var response = (HttpWebResponse)request.GetResponse())
{
var responseStream = response.GetResponseStream();
if (responseStream == null) return string.Empty;
using (var sr = new StreamReader(responseStream))
{
return sr.ReadToEnd();
}
}
}
catch
{
return string.Empty;
}
}
/// <summary>
/// POST请求
/// </summary>
/// <param name="data">POST数据</param>
/// <param name="refer">引用地址</param>
/// <returns></returns>
public string Post(string data, string refer = "")
{
if (string.IsNullOrEmpty(Url)) return string.Empty;
var request = (HttpWebRequest)WebRequest.Create(Url);
request.ServicePoint.ConnectionLimit = int.MaxValue;
request.CookieContainer = _cookie;
request.UserAgent = UserAgent;
request.KeepAlive = true;
request.Method = "POST";
request.Referer = refer;
request.Timeout = 3000;
var postBytes = Encoding.ASCII.GetBytes(data);
request.ContentType = "text/html; charset=UTF8";
request.ContentLength = postBytes.Length;
try
{
using (var requestStream = request.GetRequestStream())
{
requestStream.Write(postBytes, 0, postBytes.Length);
}
using (var response = (HttpWebResponse)request.GetResponse())
{
var responseStream = response.GetResponseStream();
if (responseStream == null) return string.Empty;
using (var sr = new StreamReader(responseStream))
{
return sr.ReadToEnd();
}
}
}
catch
{
return string.Empty;
}
}
/*
private const string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
private static readonly Encoding DefaultRequestEncoding = Encoding.GetEncoding("utf-8");
/// <summary>
/// 创建GET方式访问
/// Author: George liu
/// </summary>
/// <param name="url">访问url</param>
/// <param name="timeout">超时时间</param>
/// <param name="userAgent">用户代理</param>
/// <param name="cookies">cookie信息</param>
/// <returns></returns>
public static HttpWebResponse CreateGetHttpResponse(string url, int? timeout = null, string userAgent = null, CookieCollection cookies = null)
{
if (string.IsNullOrEmpty(url)) { return null; }
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "GET";
request.UserAgent = DefaultUserAgent;
if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; }
if (timeout.HasValue) { request.Timeout = timeout.Value; }
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
return request.GetResponse() as HttpWebResponse;
}
/// <summary>
/// 创建POST访问方式
/// Author: George liu
/// </summary>
/// <param name="url">访问url</param>
/// <param name="parameters">参数键值对</param>
/// <param name="timeout">超时时间</param>
/// <param name="userAgent">用户代理</param>
/// <param name="requestEncoding">编码类型</param>
/// <param name="cookies">cookie信息</param>
/// <returns></returns>
public static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters = null, int? timeout = null, string userAgent = null,
Encoding requestEncoding = null, CookieCollection cookies = null)
{
if (string.IsNullOrEmpty(url)) { return null; }
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = DefaultUserAgent;
if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; }
if (timeout.HasValue) { request.Timeout = timeout.Value; }
if (requestEncoding == null) { requestEncoding = DefaultRequestEncoding; }
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
if (parameters != null && parameters.Count > 0)
{
StringBuilder buffer = new StringBuilder();
var keyArray = parameters.Keys.ToArray();
for (int i = 0; i < keyArray.Length; i++)
{
if (i > 0)
{
buffer.AppendFormat("&{0}={1}", keyArray[i], parameters[keyArray[i]]);
}
else
{
buffer.AppendFormat("{0}={1}", keyArray[i], parameters[keyArray[i]]);
}
}
byte[] data = requestEncoding.GetBytes(buffer.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
}
return request.GetResponse() as HttpWebResponse;
}
/// <summary>
/// 获取客户端IP
/// </summary>
/// <returns></returns>
public static string GetClientIP()
{
var clientIp = string.Empty;
var request = HttpContext.Current.Request;
if (request.ServerVariables["HTTP_VIA"] != null)
{
clientIp = request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}
else
{
clientIp = request.ServerVariables["REMOTE_ADDR"].ToString();
}
return clientIp;
}*/
}
}
