HttpOperater-模拟HTTP操作类代码,C#代码库,德仔网

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【C#】 HttpOperater-模拟HTTP操作类
作者:天坤 / 发布于2016/7/27/ 657
注：使用时，ref string cookiesOutput参数是服务器返回的Cookie，需保存用于下次请求。
using System;  
using System.IO;  
using System.Linq;  
using System.Net;  
using System.Text;  
using System.Text.RegularExpressions;  
  
namespace Whir.Software.DocumentDownLoader.Library  
{  
    /// <summary>  
    ///     模拟HTTP操作  
    /// </summary>  
    public class HttpOperater  
    {  
        /// <summary>  
        ///     发起Http请求  
        /// </summary>  
        /// <param name="httpRequestType">请求方式</param>  
        /// <param name="url">请求地址</param>  
        /// <param name="cookieInput">请求时传入的cookie</param>  
        /// <param name="cookieOutput">服务器返回的cookie</param>  
        /// <param name="postData">发送数据</param>  
        /// <returns></returns>  
        public static string DoRequest(HttpRequestType httpRequestType, string url, string cookieInput, ref string cookieOutput, string postData)  
        {  
            string response;  
            try  
            {  
                const string windowsUserName = "";  
                const string windowsPwd = "";  
                const string userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36";  
                const string accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";  
                const string acceptLanguage = "zh-CN,zh;q=0.8";  
                const string acceptEncoding = "gzip,deflate,sdch";  
                CookieContainer cookieContainer = GetCookie(url, cookieInput);  
  
                var newUri = new Uri(url);  
                var request = (HttpWebRequest)WebRequest.Create(newUri);  
                request.PreAuthenticate = true;  
                if (windowsUserName.Length > 0 & windowsPwd.Length > 0)  
                {  
                    request.Credentials = new NetworkCredential(windowsUserName.Trim(), windowsPwd.Trim());  
                }  
                request.Timeout = 20000;  
                request.CookieContainer = cookieContainer;  
                request.UserAgent = userAgent;  
                request.Accept = accept;  
                request.Headers["Accept-Language"] = acceptLanguage;  
                request.Headers["Accept-Charset"] = acceptEncoding;  
                request.Headers["Accept-Encoding"] = acceptEncoding;  
                request.Referer = newUri.AbsoluteUri;  
                request.Method = httpRequestType == HttpRequestType.GET ? "GET" : "POST";  
                if (request.Method == "POST")  
                {  
                    request.ContentType = "application/x-www-form-urlencoded";  
                    byte[] bytes = Encoding.UTF8.GetBytes(postData);  
                    request.ContentLength = bytes.Length;  
                    using (Stream requestStream = request.GetRequestStream())  
                    {  
                        requestStream.Write(bytes, 0, bytes.Length);  
                    }  
                }  
                using (var wr = (HttpWebResponse)request.GetResponse())  
                {  
                    response = new StreamReader(wr.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();  
                }  
                CookieCollection cookies = cookieContainer.GetCookies(newUri);  
                cookieOutput = CookieTostr(cookies);  
            }  
            catch (NotSupportedException exception)  
            {  
                response = exception.Message;  
            }  
            catch (InvalidOperationException exception)  
            {  
                response = exception.Message;  
            }  
            catch (IOException exception)  
            {  
                response = exception.Message;  
            }  
            catch (Exception exception)  
            {  
                response = exception.Message;  
            }  
            return response;  
        }  
        /// <summary>  
        /// 设置cookie域  
        /// </summary>  
        /// <param name="url">请求地址</param>  
        /// <param name="cookieInput">cookie</param>  
        /// <returns></returns>  
        private static CookieContainer GetCookie(string url, string cookieInput)  
        {  
            var cookieContainer = new CookieContainer();  
            var cookies = new CookieCollection();  
            string[] cookiesArr = cookieInput.Split(';');  
            foreach (string s in cookiesArr)  
            {  
                string[] keyValuePair = s.Split('=');  
                if (keyValuePair.Length > 1)  
                {  
                    var cookie = new Cookie  
                        {  
                            Name = keyValuePair[0].Trim(),  
                            Value = keyValuePair[1].Trim(),  
                            Domain = GetDomain(url).Trim()//设置cookie域  
                        };  
                    cookies.Add(cookie);  
                }  
            }  
            cookieContainer.Add(cookies);  
            return cookieContainer;  
        }  
        /// <summary>  
        /// 通过Url取得域  
        /// </summary>  
        /// <param name="url"></param>  
        /// <returns></returns>  
        private static string GetDomain(string url)  
        {  
            var regex = new Regex("(?i)http[s]*://(?<domain>[\\w|.]*)",  
                                  RegexOptions.CultureInvariant | RegexOptions.Compiled);  
            return regex.Match(url).Groups["domain"].Value;  
        }  
  
        /// <summary>  
        /// 将cookie转为字符串  
        /// </summary>  
        /// <param name="cookies"></param>  
        /// <returns></returns>  
        private static string CookieTostr(CookieCollection cookies)  
        {  
            return cookies.Cast<Cookie>()  
                          .Aggregate(string.Empty, (current, c) => current + (c.Name + "=" + c.Value + ";"));  
        }  
    }  
  
    /// <summary>  
    ///     HTTP请求方式  
    /// </summary>  
    public enum HttpRequestType  
    {  
        /// <summary>  
        ///     GET  
        /// </summary>  
        GET = 1,  
  
        /// <summary>  
        ///     POST  
        /// </summary>  
        POST = 2  
    }  
}
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