using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Net;
using System.IO;
using System.IO.Compression;
using System.Text.RegularExpressions;
using System.Diagnostics;
using HuaTong.General.Utility;
namespace HuaTong.General.Utility
{
/// <summary>
/// 返回HTTP请求的Response
/// </summary>
public class HttpRequest
{
private static readonly string DefaultUserAgent =
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36";
/// <summary>
/// 测试网络是否可用
/// </summary>
/// <returns></returns>
public static bool TestNetworkStatus()
{
var urls = new string[] { "http://www.baidu.com", "http://www.qq.com/" };
int count = 0;
foreach (var url in urls)
{
try
{
var resp = HttpResponseGet(url, method: "HEAD");
if (resp.StatusCode == HttpStatusCode.OK)
{
count++;
}
}
catch { }
}
return count > 0;
}
/// <summary>
/// 创建GET方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static string HttpResponseGetString(string url, string getData = null, int? timeout = null, string userAgent = null,
CookieCollection cookies = null, string method = "GET")
{
using (var response = HttpResponseGet(url, getData, timeout, userAgent, cookies, method))
{
return GetResponseString(response);
}
}
/// <summary>
/// 创建GET方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static HttpWebResponse HttpResponseGet(string url, string getData = null, int? timeout = null, string userAgent = null,
CookieCollection cookies = null, string method = "GET")
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
if (getData != null)
{
url = url.Contains('?') ? url.Trim('&') : url + "?";
url += getData.Trim('&');
}
HttpWebRequest request = null;
//如果是发送HTTPS请求
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version10;
}
else
{
request = WebRequest.Create(url) as HttpWebRequest;
}
request.Method = method;
if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
else
{
request.UserAgent = DefaultUserAgent;
}
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方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="requestEncoding">发送HTTP请求时所用的编码</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static string HttpResponsePostString(string url, string postData = null,
Encoding requestEncoding = null, int? timeout = null, string userAgent = null,
CookieCollection cookies = null, bool sendJson = false, bool sendXml = false)
{
using (var response = HttpResponsePost(url, postData, requestEncoding, timeout, userAgent, cookies, sendJson, sendXml))
{
return GetResponseString(response);
}
}
/// <summary>
/// 创建POST方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="requestEncoding">发送HTTP请求时所用的编码</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static HttpWebResponse HttpResponsePost(string url, string postData = null,
Encoding requestEncoding = null, int? timeout = null, string userAgent = null,
CookieCollection cookies = null, bool sendJson = false, bool sendXml = false)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
if (requestEncoding == null)
{
requestEncoding = Encoding.UTF8;
}
HttpWebRequest request = null;
//如果是发送HTTPS请求
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version10;
}
else
{
request = WebRequest.Create(url) as HttpWebRequest;
}
request.Method = "POST";
if (sendJson)
{
request.ContentType = "application/json";
}
else if (sendXml)
{
request.ContentType = "application/xml";
}
else
{
request.ContentType = "application/x-www-form-urlencoded";
}
if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
else
{
request.UserAgent = DefaultUserAgent;
}
if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
//如果需要POST数据
if (!string.IsNullOrEmpty(postData))
{
byte[] data = requestEncoding.GetBytes(postData);
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
}
return request.GetResponse() as HttpWebResponse;
}
/// <summary>
/// 从Response中获取字符串结果
/// </summary>
/// <param name="response"></param>
/// <returns></returns>
private static string GetResponseString(HttpWebResponse response)
{
Stream stream = response.GetResponseStream();
if (stream != null)
{
StreamReader sr = new StreamReader(stream);
string result = sr.ReadToEnd();
stream.Close();
stream.Dispose();
sr.Close();
sr.Dispose();
return result;
}
return string.Empty;
}
/// <summary>
/// 屏蔽https的服务器证书验证,总是返回true
/// </summary>
/// <param name="sender"></param>
/// <param name="certificate"></param>
/// <param name="chain"></param>
/// <param name="errors"></param>
/// <returns></returns>
private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain,
SslPolicyErrors errors)
{
return true; //总是接受
}
}
}
