HTTP 请求

发布时间：2023-09-06 01:21责任编辑：林大明关键词：暂无标签

public static class HttpUtil
???{
???????#region 变量

???????#endregion

???????#region cookie容器

???????/// <summary>
???????/// 创建Cookie容器。
???????/// </summary>
???????/// <returns></returns>
???????public static CookieContainer CreateCookie()
???????{
???????????return new CookieContainer();
???????}

???????/// <summary>
???????/// 获取 cookie容器。
???????/// </summary>
???????public static CookieContainer MyCookie
???????{
???????????get
???????????{
???????????????try
???????????????{
???????????????????if (null == HttpContext.Current)
???????????????????????return null;

???????????????????var cookie = HttpContext.Current.Session["CookieContainer98562"] as CookieContainer;
???????????????????if (null == cookie)
???????????????????{
???????????????????????cookie = CreateCookie();
???????????????????????HttpContext.Current.Session["CookieContainer98562"] = cookie;
???????????????????}

???????????????????return cookie;
???????????????}
???????????????catch
???????????????{
???????????????????return null;
???????????????}
???????????}
???????}

???????/// <summary>
???????/// 获取指定URI下的Cookie键和值。
???????/// </summary>
???????/// <param name="uri"></param>
???????/// <returns></returns>
???????public static string GetCookeValues(Uri uri)
???????{
???????????var t = string.Empty;
???????????foreach (Cookie _cookie in HttpUtil.MyCookie.GetCookies(new Uri("http://b2b.cits.com.cn")))
???????????{
???????????????t += _cookie.Name + ":" + _cookie.Value + "\n";
???????????}
???????????return t;
???????}

???????#endregion

???????#region 模拟浏览器请求数据
???????/// <summary>
???????/// 模拟浏览器GET数据。
???????/// </summary>
???????/// <param name="url">请求网址</param>
???????/// <returns></returns>
???????public static string GetData(string url)
???????{
???????????return GetData(url, Encoding.UTF8);
???????}

???????/// <summary>
???????/// 模拟浏览器GET数据。
???????/// </summary>
???????/// <param name="url">请求网址</param>
???????/// <param name="en">字符编码</param>
???????/// <returns></returns>
???????public static string GetData(string url, Encoding en)
???????{
???????????var req = (HttpWebRequest)WebRequest.Create(url);
???????????req.CookieContainer = MyCookie;
???????????req.KeepAlive = true;
???????????req.Method = "GET";
???????????req.Host = "flights.ctrip.com";
???????????req.ContentType = "application/x-www-form-urlencoded";
???????????req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0";
???????????req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
???????????req.AllowAutoRedirect = true;
???????????req.Timeout = 50000;
???????????req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
???????????//req.Accept = "application/json";

???????????return GetData(req, en);
???????}

???????/// <summary>
???????/// 模拟浏览器GET数据。
???????/// </summary>
???????/// <param name="url">请求网址</param>
???????/// <param name="en">编码</param>
???????/// <returns></returns>
???????public static string GetData(HttpWebRequest req, Encoding en)
???????{
???????????if (null == req.CookieContainer)
???????????????req.CookieContainer = MyCookie;

???????????if (req.RequestUri.ToString().StartsWith("https", StringComparison.OrdinalIgnoreCase))
???????????{
???????????????ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
???????????????ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
???????????????req.ProtocolVersion = HttpVersion.Version10;
???????????} ??????????

???????????var res = (HttpWebResponse)req.GetResponse();
???????????//CookieCollection cook = res.Cookies; ???????????
???????????using (var resStream = res.GetResponseStream())
???????????{
???????????????using (var sr = new StreamReader(resStream, en))
???????????????{
???????????????????return sr.ReadToEnd();
???????????????}
???????????}
???????}

???????/// <summary>
???????/// 模拟浏览器下载数据。
???????/// </summary>
???????/// <param name="url">请求网址</param>
???????/// <returns></returns>
???????public static Stream DownloadData(HttpWebRequest req)
???????{
???????????if (null == req.CookieContainer)
???????????????req.CookieContainer = MyCookie;

???????????System.Net.ServicePointManager.ServerCertificateValidationCallback += (se, cert, chain, sslerror) =>
???????????{
???????????????return true;
???????????};

???????????return ((HttpWebResponse)req.GetResponse()).GetResponseStream();
???????}

???????public static string PrintCookie(CookieCollection cookies)
???????{
???????????var s = "";
???????????foreach (System.Net.Cookie _c in cookies)
???????????????s += _c.Name + ":" + _c.Value + "(" + _c.Domain + ")" + "，";

???????????return s;
???????}

???????/// <summary>
???????/// 模拟浏览器GET数据。
???????/// </summary>
???????/// <param name="url">请求网址</param>
???????/// <param name="en">编码</param>
???????/// <returns></returns>
???????public static void GetDataAsync(HttpWebRequest req, AsyncCallback callback)
???????{
???????????if (null == req.CookieContainer)
???????????????req.CookieContainer = MyCookie;

???????????System.Net.ServicePointManager.ServerCertificateValidationCallback += (se, cert, chain, sslerror) =>
???????????{
???????????????return true;
???????????};

???????????req.BeginGetResponse(callback, req);
???????}

???????/// <summary>
???????/// 模拟浏览器请求Post数据。
???????/// </summary>
???????/// <param name="url">对方API网址</param>
???????/// <param name="postData">请求数据</param>
???????/// <returns></returns>
???????public static string PostData(string url, string postData)
???????{
???????????var req = (HttpWebRequest)WebRequest.Create(url);
???????????req.KeepAlive = true;
???????????req.Method = "POST";
???????????req.AllowAutoRedirect = true;
???????????req.CookieContainer = MyCookie;
???????????req.Host = "kyfw.12306.cn";
???????????req.ContentType = "application/x-www-form-urlencoded";
???????????req.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C; .NET4.0E)";
???????????req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
???????????req.AllowAutoRedirect = true;
???????????req.Timeout = 50000;

???????????return PostData(req, postData, Encoding.UTF8);
???????}

???????/// <summary>
???????/// 模拟浏览器请求Post数据。
???????/// </summary>
???????/// <param name="req">http请求</param>
???????/// <param name="postData">请求数据</param>
???????/// <param name="en">编码</param>
???????/// <returns></returns>
???????public static string PostData(HttpWebRequest req, string postData, Encoding en)
???????{
???????????CookieCollection cookies = null;
???????????return PostData(req, postData, en, ref cookies);
???????}

???????/// <summary>
???????/// 模拟浏览器请求Post数据。
???????/// </summary>
???????/// <param name="req">http请求</param>
???????/// <param name="postData">请求数据</param>
???????/// <param name="en">编码</param>
???????/// <param name="cookies">从服务器端获取到的关联cookie</param>
???????/// <returns></returns>
???????public static string PostData(HttpWebRequest req, string postData, Encoding en, ref CookieCollection cookies)
???????{
???????????if (null == req.CookieContainer)
???????????????req.CookieContainer = MyCookie;

???????????req.MaximumAutomaticRedirections = 4;
???????????req.MaximumResponseHeadersLength = 4;
???????????req.Credentials = CredentialCache.DefaultCredentials;

???????????var buffer = en.GetBytes(postData);
???????????req.ContentLength = buffer.Length;
???????????using (var reqStream = req.GetRequestStream())
???????????{
???????????????reqStream.Write(buffer, 0, buffer.Length);
???????????}

???????????var res = (HttpWebResponse)req.GetResponse();
???????????if (null != req.CookieContainer)
???????????{
???????????????res.Cookies = req.CookieContainer.GetCookies(req.RequestUri);
???????????????cookies = res.Cookies;
???????????}

???????????using (var resStream = res.GetResponseStream())
???????????{
???????????????using (var sr = new StreamReader(resStream, en))
???????????????{
???????????????????return sr.ReadToEnd();
???????????????}
???????????}
???????}

???????/// <summary>
???????/// Htpp Post请求数据。
???????/// </summary>
???????/// <param name="url">对方API网址</param>
???????/// <param name="postData">请求数据</param>
???????/// <param name="enCoding">字符编码</param>
???????/// <returns></returns>
???????public static string PostData(string url, byte[] buffer, Encoding enCoding)
???????{
???????????var req = (HttpWebRequest)WebRequest.Create(url);
???????????req.KeepAlive = true;
???????????req.Method = "POST";
???????????req.AllowAutoRedirect = true;
???????????//req.CookieContainer = MyCookie;
???????????req.ContentType = "application/x-www-form-urlencoded";
???????????req.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C; .NET4.0E)";
???????????req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
???????????req.AllowAutoRedirect = true;
???????????req.Timeout = 50000;

???????????req.ContentLength = buffer.Length;
???????????using (var reqStream = req.GetRequestStream())
???????????{
???????????????reqStream.Write(buffer, 0, buffer.Length);
???????????}

???????????System.Net.ServicePointManager.ServerCertificateValidationCallback += (se, cert, chain, sslerror) =>
???????????{
???????????????return true;
???????????};

???????????var res = (HttpWebResponse)req.GetResponse();
???????????using (var resStream = res.GetResponseStream())
???????????{
???????????????using (var sr = new StreamReader(resStream, enCoding))
???????????????{
???????????????????return sr.ReadToEnd();
???????????????}
???????????}
???????}

???????#endregion

???????#region 填充基本的HttpWebRequest

???????/// <summary>
???????/// 填充基本的HttpWebRequest。
???????/// </summary>
???????/// <param name="req">HttpWebRequest对象</param>
???????/// <param name="method">请求方法(取值：GET OR POST)</param>
???????/// <param name="host">Host标头值</param>
???????/// <param name="referer">当前引用页面网址</param>
???????public static void FillWebRequest(HttpWebRequest req, string method, string host, string referer)
???????{
???????????if (null == req)
???????????????return;

???????????if (null == req.CookieContainer)
???????????????req.CookieContainer = HttpUtil.MyCookie;

???????????req.KeepAlive = true;
???????????req.Method = method;
???????????req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
???????????req.AllowAutoRedirect = true;
???????????req.ContentType = "application/x-www-form-urlencoded";
???????????req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0";
???????????req.AllowAutoRedirect = true;
???????????req.Timeout = 50000;
???????????req.Host = host;
???????????req.Referer = referer;
???????}

???????/// <summary>
???????/// 创建HTTP请求对象。
???????/// </summary>
???????/// <param name="cookie">Cookie对象</param>
???????/// <param name="url">请求网址</param>
???????/// <param name="method">请求方法(取值：GET OR POST)</param>
???????/// <param name="host">Host标头值</param>
???????/// <param name="referer">当前引用页面网址</param>
???????/// <returns></returns>
???????public static HttpWebRequest CreateWebRequest(CookieContainer cookie, string url, string method, string host, string referer)
???????{
???????????var req = (HttpWebRequest)WebRequest.Create(url);
???????????req.CookieContainer = cookie;
???????????FillWebRequest(req, method, host, referer);
???????????return req;
???????}

???????#endregion ???????

???????#region 获取所有参数

???????/// <summary>
???????/// 获取所有请求参数(GET OR POST)。
???????/// </summary>
???????/// <param name="context"></param>
???????/// <returns></returns>
???????public static string GetRequestString(HttpContext context)
???????{
???????????return context.Request.RequestType.IgnoreCaseEquals("POST") ? context.Request.Form.ToString() : context.Request.QueryString.ToString();
???????}

???????#endregion

???????#region 其他方法

???????/// <summary>
???????/// 验证证书。
???????/// </summary>
???????/// <param name="sender"></param>
???????/// <param name="certificate"></param>
???????/// <param name="chain"></param>
???????/// <param name="errors"></param>
???????/// <returns></returns>
???????public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
???????{
???????????return true;
???????}

???????#endregion
???}

HTTP 请求

原文地址：http://www.cnblogs.com/zy-theone/p/7749944.html

HTTP 请求

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