苏飞论坛

 找回密码
 马上注册

QQ登录

只需一步,快速开始

扫一扫,访问微社区

分布式系统框架(V1.3) 轻松承载百亿数据,千万流量!讨论专区 - 源码下载 - 官方教程

HttpHelper万能框架(V2.3) HttpHelper官方出品,无敌框架讨论区 - 源码下载 - 在线测试和代码生成

HttpHelper爬虫类(V1.9) 最牛的爬虫类,没有爬不到只有想不到 源码 - 代码生成器 - 讨论区 - 教程- 例子

查看: 13971|回复: 17

[教程] C#HttpHelper类1.3正式版教程与升级报告

[复制链接]
发表于 2013-4-29 08:40:37 | 显示全部楼层 |阅读模式
                 C#HttpHelper类1.3正式版教程与升级报告
导读部分
-------------------------------------------------------------------------------------------------------------
C#HttpHelper类苏飞版--系列教程导航
http://www.sufeinet.com/thread-3-1-1.html

                      本站是C#HttpHelper类唯一官方网站,唯一更新网站,希望大家收藏关注。
1.升级报告

  1. 1.修正了在发生访问异常时对response.StatusCode!=null的检测
  2. 2.因为【myde520】的反馈,修正了取编码格式时的Bug(当编码中有空格时会报错),为此表示感谢
  3. 3.增加Url转码与解码的方法
  4. 4.修改当设置编码时不进行Copy方法的执行,因为这是没有必要的,会影响性能,感谢xlj_qq的建议
  5. 5.代理带端口的无法连接Bug  xiaotianbao  Eagle changlei  感谢他们提供的建议
  6. 6. //得到返回的HTML
  7. 这个问题目前还没有想到解决的办法,希望大家一起来想想办法看看怎么解决类似的问题

  8.                     result.Html = encoding.GetString(RawResponse).ToString();
  9. 加一个.ToString()方法,在文本中出现|的时候会显示不全,其实内容是完整的,这个问题感谢kidsoft的反馈
  10. 反馈过程http://www.sufeinet.com/thread-2398-1-1.html
复制代码
2.HttpHelper1.3正式版下载

下载地址http://www.sufeinet.com/thread-3-1-1.html
在线测试工具:http://www.sufeinet.com/thread-3690-1-1.html
专用Cookie分析类http://www.sufeinet.com/thread-2382-1-1.html
要学习更多关于C# Http的请是看我的文章 C# HttpWebRequest 绝技
代码如下所示
[C#] 纯文本查看 复制代码
/// <summary>
/// 类说明:HttpHelps类,用来实现Http访问,Post或者Get方式的,直接访问,带Cookie的,带证书的等方式,可以设置代理
/// 重要提示:请不要自行修改本类,如果因为你自己修改后将无法升级到新版本。如果确实有什么问题请到官方网站提建议,
/// 我们一定会及时修改
/// 编码日期:2011-09-20
/// 编 码 人:苏飞
/// 联系方式:361983679  
/// 官方网址:[url=http://www.sufeinet.com/thread-3-1-1.html]http://www.sufeinet.com/thread-3-1-1.html[/url]
/// 修改日期:2013-04-29
/// </summary>
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.IO.Compression;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace DotNet.Utilities
{
    /// <summary>
    /// Http连接操作帮助类
    /// </summary>
    public class HttpHelper
    {
        #region 预定义方法或者变更
        //默认的编码
        private Encoding encoding = Encoding.Default;
        //HttpWebRequest对象用来发起请求
        private HttpWebRequest request = null;
        //获取影响流的数据对象
        private HttpWebResponse response = null;
        /// <summary>
        /// 根据相传入的数据,得到相应页面数据
        /// </summary>
        /// <param name="objhttpitem">参数类对象</param>
        /// <returns>返回HttpResult类型</returns>
        private HttpResult GetHttpRequestData(HttpItem objhttpitem)
        {
            //返回参数
            HttpResult result = new HttpResult();
            try
            {
                #region 得到请求的response
                using (response = (HttpWebResponse)request.GetResponse())
                {
                    result.StatusCode = response.StatusCode;
                    result.StatusDescription = response.StatusDescription;
                    result.Header = response.Headers;
                    if (response.Cookies != null)
                        result.CookieCollection = response.Cookies;
                    if (response.Headers["set-cookie"] != null)
                        result.Cookie = response.Headers["set-cookie"];
                    MemoryStream _stream = new MemoryStream();
                    //GZIIP处理
                    if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
                    {
                        //开始读取流并设置编码方式
                        //new GZipStream(response.GetResponseStream(), CompressionMode.Decompress).CopyTo(_stream, 10240);
                        //.net4.0以下写法
                        _stream = GetMemoryStream(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
                    }
                    else
                    {
                        //开始读取流并设置编码方式
                        //response.GetResponseStream().CopyTo(_stream, 10240);
                        //.net4.0以下写法
                        _stream = GetMemoryStream(response.GetResponseStream());
                    }
                    //获取Byte
                    byte[] RawResponse = _stream.ToArray();
                    _stream.Close();
                    //是否返回Byte类型数据
                    if (objhttpitem.ResultType == ResultType.Byte)
                        result.ResultByte = RawResponse;
                    //从这里开始我们要无视编码了
                    if (encoding == null)
                    {
                        Match meta = Regex.Match(Encoding.Default.GetString(RawResponse), "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase);
                        string charter = (meta.Groups.Count > 2) ? meta.Groups[2].Value.ToLower() : string.Empty;
                        charter = charter.Replace("\"", "").Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk");
                        if (charter.Length > 2)
                            encoding = Encoding.GetEncoding(charter.Trim());
                        else
                        {
                            if (string.IsNullOrEmpty(response.CharacterSet))
                                encoding = Encoding.UTF8;
                            else
                                encoding = Encoding.GetEncoding(response.CharacterSet);
                        }
                    }
                    //得到返回的HTML
                    result.Html = encoding.GetString(RawResponse);
                }
                #endregion
            }
            catch (WebException ex)
            {
                //这里是在发生异常时返回的错误信息
                response = (HttpWebResponse)ex.Response;
                result.Html = ex.Message;
                if (response!= null)
                {
                    result.StatusCode = response.StatusCode;
                    result.StatusDescription = response.StatusDescription;
                }
            }
            catch (Exception ex)
            {
                result.Html = ex.Message;
            }
            if (objhttpitem.IsToLower)
                result.Html = result.Html.ToLower();

            return result;
        }
        /// <summary>
        /// 4.0以下.net版本取数据使用
        /// </summary>
        /// <param name="streamResponse">流</param>
        private static MemoryStream GetMemoryStream(Stream streamResponse)
        {
            MemoryStream _stream = new MemoryStream();
            int Length = 256;
            Byte[] buffer = new Byte[Length];
            int bytesRead = streamResponse.Read(buffer, 0, Length);
            // write the required bytes  
            while (bytesRead > 0)
            {
                _stream.Write(buffer, 0, bytesRead);
                bytesRead = streamResponse.Read(buffer, 0, Length);
            }
            return _stream;
        }
        /// <summary>
        /// 为请求准备参数
        /// </summary>
        ///<param name="objhttpItem">参数列表</param>
        /// <param name="_Encoding">读取数据时的编码方式</param>
        private void SetRequest(HttpItem objhttpItem)
        {
            // 验证证书
            SetCer(objhttpItem);
            //设置Header参数
            if (objhttpItem.Header != null && objhttpItem.Header.Count > 0)
            {
                foreach (string item in objhttpItem.Header.AllKeys)
                {
                    request.Headers.Add(item, objhttpItem.Header[item]);
                }
            }
            // 设置代理
            SetProxy(objhttpItem);
            //请求方式Get或者Post
            request.Method = objhttpItem.Method;
            request.Timeout = objhttpItem.Timeout;
            request.ReadWriteTimeout = objhttpItem.ReadWriteTimeout;
            //Accept
            request.Accept = objhttpItem.Accept;
            //ContentType返回类型
            request.ContentType = objhttpItem.ContentType;
            //UserAgent客户端的访问类型,包括浏览器版本和操作系统信息
            request.UserAgent = objhttpItem.UserAgent;
            // 编码
            encoding = objhttpItem.Encoding;
            //设置Cookie
            SetCookie(objhttpItem);
            //来源地址
            request.Referer = objhttpItem.Referer;
            //是否执行跳转功能
            request.AllowAutoRedirect = objhttpItem.Allowautoredirect;
            //设置Post数据
            SetPostData(objhttpItem);
            //设置最大连接
            if (objhttpItem.Connectionlimit > 0)
                request.ServicePoint.ConnectionLimit = objhttpItem.Connectionlimit;
        }
        /// <summary>
        /// 设置证书
        /// </summary>
        /// <param name="objhttpItem"></param>
        private void SetCer(HttpItem objhttpItem)
        {
            if (!string.IsNullOrEmpty(objhttpItem.CerPath))
            {
                //这一句一定要写在创建连接的前面。使用回调的方法进行证书验证。
                ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
                //初始化对像,并设置请求的URL地址
                request = (HttpWebRequest)WebRequest.Create(objhttpItem.URL);
                //将证书添加到请求里
                request.ClientCertificates.Add(new X509Certificate(objhttpItem.CerPath));
            }
            else
                //初始化对像,并设置请求的URL地址
                request = (HttpWebRequest)WebRequest.Create(objhttpItem.URL);
        }
        /// <summary>
        /// 设置Cookie
        /// </summary>
        /// <param name="objhttpItem">Http参数</param>
        private void SetCookie(HttpItem objhttpItem)
        {
            if (!string.IsNullOrEmpty(objhttpItem.Cookie))
                //Cookie
                request.Headers[HttpRequestHeader.Cookie] = objhttpItem.Cookie;
            //设置Cookie
            if (objhttpItem.CookieCollection != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(objhttpItem.CookieCollection);
            }
        }
        /// <summary>
        /// 设置Post数据
        /// </summary>
        /// <param name="objhttpItem">Http参数</param>
        private void SetPostData(HttpItem objhttpItem)
        {
            //验证在得到结果时是否有传入数据
            if (request.Method.Trim().ToLower().Contains("post"))
            {
                byte[] buffer = null;
                //写入Byte类型
                if (objhttpItem.PostDataType == PostDataType.Byte && objhttpItem.PostdataByte != null && objhttpItem.PostdataByte.Length > 0)
                {
                    //验证在得到结果时是否有传入数据
                    buffer = objhttpItem.PostdataByte;
                }//写入文件
                else if (objhttpItem.PostDataType == PostDataType.FilePath && !string.IsNullOrEmpty(objhttpItem.Postdata))
                {
                    StreamReader r = new StreamReader(objhttpItem.Postdata, encoding);
                    buffer = Encoding.Default.GetBytes(r.ReadToEnd());
                    r.Close();
                } //写入字符串
                else if (!string.IsNullOrEmpty(objhttpItem.Postdata))
                {
                    buffer = Encoding.Default.GetBytes(objhttpItem.Postdata);
                }
                if (buffer != null)
                {
                    request.ContentLength = buffer.Length;
                    request.GetRequestStream().Write(buffer, 0, buffer.Length);
                }
            }
        }
        /// <summary>
        /// 设置代理
        /// </summary>
        /// <param name="objhttpItem">参数对象</param>
        private void SetProxy(HttpItem objhttpItem)
        {
            if (!string.IsNullOrEmpty(objhttpItem.ProxyIp))
            {
                //设置代理服务器
                if (objhttpItem.ProxyIp.Contains(":"))
                {
                    string[] plist = objhttpItem.ProxyIp.Split(':');
                    WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim()));
                    //建议连接
                    myProxy.Credentials = new NetworkCredential(objhttpItem.ProxyUserName, objhttpItem.ProxyPwd);
                    //给当前请求对象
                    request.Proxy = myProxy;
                }
                else
                {
                    WebProxy myProxy = new WebProxy(objhttpItem.ProxyIp, false);
                    //建议连接
                    myProxy.Credentials = new NetworkCredential(objhttpItem.ProxyUserName, objhttpItem.ProxyPwd);
                    //给当前请求对象
                    request.Proxy = myProxy;
                }
                //设置安全凭证
                request.Credentials = CredentialCache.DefaultNetworkCredentials;
            }
        }

        /// <summary>
        /// 回调验证证书问题
        /// </summary>
        /// <param name="sender">流对象</param>
        /// <param name="certificate">证书</param>
        /// <param name="chain">X509Chain</param>
        /// <param name="errors">SslPolicyErrors</param>
        /// <returns>bool</returns>
        public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            // 总是接受    
            return true;
        }
        #endregion
        #region 普通类型
        ///<summary>
        ///采用https协议访问网络,根据传入的URl地址,得到响应的数据字符串。
        ///</summary>
        ///<param name="objhttpItem">参数列表</param>
        ///<returns>String类型的数据</returns>
        public HttpResult GetHtml(HttpItem objhttpItem)
        {
            try
            {
                //准备参数
                SetRequest(objhttpItem);
            }
            catch (Exception ex)
            {
                HttpResult Result = new HttpResult()
                {
                    Cookie = "",
                    Header = null,
                    Html = ex.Message,
                    StatusDescription = "配置参考时报错"
                };
                return Result;
            }
            //调用专门读取数据的类
            return GetHttpRequestData(objhttpItem);
        }
        #endregion
    }
    /// <summary>
    /// Http请求参考类
    /// </summary>
    public class HttpItem
    {
        string _URL = string.Empty;
        /// <summary>
        /// 请求URL必须填写
        /// </summary>
        public string URL
        {
            get { return _URL; }
            set { _URL = value; }
        }
        string _Method = "GET";
        /// <summary>
        /// 请求方式默认为GET方式,当为POST方式时必须设置Postdata的值
        /// </summary>
        public string Method
        {
            get { return _Method; }
            set { _Method = value; }
        }
        int _Timeout = 100000;
        /// <summary>
        /// 默认请求超时时间
        /// </summary>
        public int Timeout
        {
            get { return _Timeout; }
            set { _Timeout = value; }
        }
        int _ReadWriteTimeout = 30000;
        /// <summary>
        /// 默认写入Post数据超时间
        /// </summary>
        public int ReadWriteTimeout
        {
            get { return _ReadWriteTimeout; }
            set { _ReadWriteTimeout = value; }
        }
        string _Accept = "text/html, application/xhtml+xml, */*";
        /// <summary>
        /// 请求标头值 默认为text/html, application/xhtml+xml, */*
        /// </summary>
        public string Accept
        {
            get { return _Accept; }
            set { _Accept = value; }
        }
        string _ContentType = "text/html";
        /// <summary>
        /// 请求返回类型默认 text/html
        /// </summary>
        public string ContentType
        {
            get { return _ContentType; }
            set { _ContentType = value; }
        }
        string _UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";
        /// <summary>
        /// 客户端访问信息默认Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
        /// </summary>
        public string UserAgent
        {
            get { return _UserAgent; }
            set { _UserAgent = value; }
        }
        Encoding _Encoding = null;
        /// <summary>
        /// 返回数据编码默认为NUll,可以自动识别,一般为utf-8,gbk,gb2312
        /// </summary>
        public Encoding Encoding
        {
            get { return _Encoding; }
            set { _Encoding = value; }
        }
        private PostDataType _PostDataType = PostDataType.String;
        /// <summary>
        /// Post的数据类型
        /// </summary>
        public PostDataType PostDataType
        {
            get { return _PostDataType; }
            set { _PostDataType = value; }
        }
        string _Postdata = string.Empty;
        /// <summary>
        /// Post请求时要发送的字符串Post数据
        /// </summary>
        public string Postdata
        {
            get { return _Postdata; }
            set { _Postdata = value; }
        }
        private byte[] _PostdataByte = null;
        /// <summary>
        /// Post请求时要发送的Byte类型的Post数据
        /// </summary>
        public byte[] PostdataByte
        {
            get { return _PostdataByte; }
            set { _PostdataByte = value; }
        }
        CookieCollection cookiecollection = null;
        /// <summary>
        /// Cookie对象集合
        /// </summary>
        public CookieCollection CookieCollection
        {
            get { return cookiecollection; }
            set { cookiecollection = value; }
        }
        string _Cookie = string.Empty;
        /// <summary>
        /// 请求时的Cookie
        /// </summary>
        public string Cookie
        {
            get { return _Cookie; }
            set { _Cookie = value; }
        }
        string _Referer = string.Empty;
        /// <summary>
        /// 来源地址,上次访问地址
        /// </summary>
        public string Referer
        {
            get { return _Referer; }
            set { _Referer = value; }
        }
        string _CerPath = string.Empty;
        /// <summary>
        /// 证书绝对路径
        /// </summary>
        public string CerPath
        {
            get { return _CerPath; }
            set { _CerPath = value; }
        }
        private Boolean isToLower = false;
        /// <summary>
        /// 是否设置为全文小写,默认为不转化
        /// </summary>
        public Boolean IsToLower
        {
            get { return isToLower; }
            set { isToLower = value; }
        }
        private Boolean allowautoredirect = false;
        /// <summary>
        /// 支持跳转页面,查询结果将是跳转后的页面,默认是不跳转
        /// </summary>
        public Boolean Allowautoredirect
        {
            get { return allowautoredirect; }
            set { allowautoredirect = value; }
        }
        private int connectionlimit = 1024;
        /// <summary>
        /// 最大连接数
        /// </summary>
        public int Connectionlimit
        {
            get { return connectionlimit; }
            set { connectionlimit = value; }
        }
        private string proxyusername = string.Empty;
        /// <summary>
        /// 代理Proxy 服务器用户名
        /// </summary>
        public string ProxyUserName
        {
            get { return proxyusername; }
            set { proxyusername = value; }
        }
        private string proxypwd = string.Empty;
        /// <summary>
        /// 代理 服务器密码
        /// </summary>
        public string ProxyPwd
        {
            get { return proxypwd; }
            set { proxypwd = value; }
        }
        private string proxyip = string.Empty;
        /// <summary>
        /// 代理 服务IP
        /// </summary>
        public string ProxyIp
        {
            get { return proxyip; }
            set { proxyip = value; }
        }
        private ResultType resulttype = ResultType.String;
        /// <summary>
        /// 设置返回类型String和Byte
        /// </summary>
        public ResultType ResultType
        {
            get { return resulttype; }
            set { resulttype = value; }
        }
        private WebHeaderCollection header = new WebHeaderCollection();
        //header对象
        public WebHeaderCollection Header
        {
            get { return header; }
            set { header = value; }
        }
    }
    /// <summary>
    /// Http返回参数类
    /// </summary>
    public class HttpResult
    {
        string _Cookie = string.Empty;
        /// <summary>
        /// Http请求返回的Cookie
        /// </summary>
        public string Cookie
        {
            get { return _Cookie; }
            set { _Cookie = value; }
        }
        CookieCollection cookiecollection = new CookieCollection();
        /// <summary>
        /// Cookie对象集合
        /// </summary>
        public CookieCollection CookieCollection
        {
            get { return cookiecollection; }
            set { cookiecollection = value; }
        }
        private string html = string.Empty;
        /// <summary>
        /// 返回的String类型数据 只有ResultType.String时才返回数据,其它情况为空
        /// </summary>
        public string Html
        {
            get { return html; }
            set { html = value; }
        }
        private byte[] resultbyte = null;
        /// <summary>
        /// 返回的Byte数组 只有ResultType.Byte时才返回数据,其它情况为空
        /// </summary>
        public byte[] ResultByte
        {
            get { return resultbyte; }
            set { resultbyte = value; }
        }
        private WebHeaderCollection header = new WebHeaderCollection();
        //header对象
        public WebHeaderCollection Header
        {
            get { return header; }
            set { header = value; }
        }
        private string statusDescription = "";
        /// <summary>
        /// 返回状态说明
        /// </summary>
        public string StatusDescription
        {
            get { return statusDescription; }
            set { statusDescription = value; }
        }
        private HttpStatusCode statusCode = HttpStatusCode.OK;
        /// <summary>
        /// 返回状态码,默认为OK
        /// </summary>
        public HttpStatusCode StatusCode
        {
            get { return statusCode; }
            set { statusCode = value; }
        }
    }
    /// <summary>
    /// 返回类型
    /// </summary>
    public enum ResultType
    {
        /// <summary>
        /// 表示只返回字符串 只有Html有数据
        /// </summary>
        String,
        /// <summary>
        /// 表示返回字符串和字节流 ResultByte和Html都有数据返回
        /// </summary>
        Byte
    }
    /// <summary>
    /// Post的数据格式默认为string
    /// </summary>
    public enum PostDataType
    {
        /// <summary>
        /// 字符串类型,这时编码Encoding可不设置
        /// </summary>
        String,
        /// <summary>
        /// Byte类型,需要设置PostdataByte参数的值编码Encoding可设置为空
        /// </summary>
        Byte,
        /// <summary>
        /// 传文件,Postdata必须设置为文件的绝对路径,必须设置Encoding的值
        /// </summary>
        FilePath
    }
}

3.HttpHelper类使用方法

使用方法如下
[C#] 纯文本查看 复制代码
 HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem()
            {
                URL = "http://www.sufeinet.com",//URL     必需项
                Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
                //Encoding = Encoding.Default,
                Method = "get",//URL     可选项 默认为Get
                Timeout = 100000,//连接超时时间     可选项默认为100000
                ReadWriteTimeout = 30000,//写入Post数据超时时间     可选项默认为30000
                IsToLower = false,//得到的HTML代码是否转成小写     可选项默认转小写
                Cookie = "",//字符串Cookie     可选项
                UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",//用户的浏览器类型,版本,操作系统     可选项有默认值
                Accept = "text/html, application/xhtml+xml, */*",//    可选项有默认值
                ContentType = "text/html",//返回类型    可选项有默认值
                Referer = "http://www.sufeinet.com",//来源URL     可选项
                Allowautoredirect = true,//是否根据301跳转     可选项
                CerPath = "d:\\123.cer",//证书绝对路径     可选项不需要证书时可以不写这个参数
                Connectionlimit = 1024,//最大连接数     可选项 默认为1024
                Postdata = "C:\\PERKYSU_20121129150608_ScrubLog.txt",//Post数据     可选项GET时不需要写
                PostDataType = PostDataType.FilePath,//默认为传入String类型,也可以设置PostDataType.Byte传入Byte类型数据
                ProxyIp = "192.168.1.105:8015",//代理服务器ID 端口可以直接加到后面以:分开就行了    可选项 不需要代理 时可以不设置这三个参数
                ProxyPwd = "123456",//代理服务器密码     可选项
                ProxyUserName = "administrator",//代理服务器账户名     可选项
                ResultType = ResultType.Byte,//返回数据类型,是Byte还是String
                PostdataByte = System.Text.Encoding.Default.GetBytes("测试一下"),//如果PostDataType为Byte时要设置本属性的值
                CookieCollection = new System.Net.CookieCollection(),//可以直接传一个Cookie集合进来
            };
            item.Header.Add("测试Key1", "测试Value1");
            item.Header.Add("测试Key2", "测试Value2");
            //得到HTML代码
            HttpResult result = http.GetHtml(item);
            //取出返回的Cookie
            string cookie = result.Cookie;
            //返回的Html内容
            string html = result.Html;
            if (result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                //表示访问成功,具体的大家就参考HttpStatusCode类
            }
            //表示StatusCode的文字说明与描述
            string statusCodeDescription = result.StatusDescription;
            //把得到的Byte转成图片
            Image img = byteArrayToImage(result.ResultByte);
        }
        /// <summary>
        /// 字节数组生成图片
        /// </summary>
        /// <param name="Bytes">字节数组</param>
        /// <returns>图片</returns>
        private Image byteArrayToImage(byte[] Bytes)
        {
            using (MemoryStream ms = new MemoryStream(Bytes))
            {
                Image outputImg = Image.FromStream(ms);
                return outputImg;
            }
        }

本例子是一个统一的标准写法,大家可以根据需要自行修改,在下面还会有对特定功能的说明请大家继续看
4.最简单的Post与Get的写法

[C#] 纯文本查看 复制代码
 HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem()
            {
                URL = "http://www.sufeinet.com",//URL这里都是测试     必需项
                Method = "get",//URL     可选项 默认为Get
            };
            //得到HTML代码
            HttpResult result = http.GetHtml(item);
            item = new HttpItem()
           {
               URL = "http://tool.sufeinet.com",//URL这里都是测试URl   必需项
               Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
               //Encoding = Encoding.Default,
               Method = "post",//URL     可选项 默认为Get
               Postdata = "user=123123&pwd=1231313"
           };
            //得到新的HTML代码
            result = http.GetHtml(item);

5.HttpHelper设置Header参考的方法

[C#] 纯文本查看 复制代码
  HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem()
            {
                URL = "http://www.sufeinet.com",//URL     必需项
                Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
                 //Encoding = Encoding.Default,
                Method = "get",//URL     可选项 默认为Get
            };
            item.Header.Add("测试Key1", "测试Value1");
            item.Header.Add("测试Key2", "测试Value2");
            //得到HTML代码
            HttpResult result = http.GetHtml(item);
            //取出返回的Cookie
            string cookie = result.Cookie;
            //返回的Html内容
            string html = result.Html;
            if (result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                //表示访问成功,具体的大家就参考HttpStatusCode类
            }
            //表示StatusCode的文字说明与描述
            string statusCodeDescription = result.StatusDescription;



下面我列出一些不能直接Add的参数
6.HttpHelper获取图片的方式
[C#] 纯文本查看 复制代码
  HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem()
            {
                URL = "http://www.sufeinet.com",//URL     必需项
                Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
                //Encoding = Encoding.Default,
                ResultType = ResultType.Byte
            };
            //得到HTML代码
            HttpResult result = http.GetHtml(item);
            if (result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                //表示访问成功,具体的大家就参考HttpStatusCode类
            }
            //表示StatusCode的文字说明与描述
            string statusCodeDescription = result.StatusDescription;
            //把得到的Byte转成图片
            Image img = byteArrayToImage(result.ResultByte);
        }

        /// <summary>
        /// 字节数组生成图片
        /// </summary>
        /// <param name="Bytes">字节数组</param>
        /// <returns>图片</returns>
        private Image byteArrayToImage(byte[] Bytes)
        {
            using (MemoryStream ms = new MemoryStream(Bytes))
            {
                Image outputImg = Image.FromStream(ms);
                return outputImg;
            }
        }

7.二次或多次使用Cookie的方式

[C#] 纯文本查看 复制代码
  HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem()
            {
                URL = "http://www.sufeinet.com",//URL这里都是测试     必需项
                Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
                //Encoding = Encoding.Default,
                Method = "get",//URL     可选项 默认为Get
            };
            //得到HTML代码
            HttpResult result = http.GetHtml(item);
            item = new HttpItem()
           {
               URL = "http://tool.sufeinet.com",//URL这里都是测试URl   必需项
               Encoding = null,//编码格式(utf-8,gb2312,gbk)     可选项 默认类会自动识别
               //Encoding = Encoding.Default,
               Method = "get",//URL     可选项 默认为Get
               Cookie = result.Cookie,
           };
            //得到新的HTML代码
            result = http.GetHtml(item);

大家有什么问题请回复我吧

本帖被以下淘专辑推荐:

发表于 2013-4-29 09:11:04 | 显示全部楼层
发表于 2013-4-30 17:43:54 | 显示全部楼层
我在做QQ邮箱登录的时候 也是用的这个方法,但是总是会返回  ptuiCB('7','0','','0','很遗憾,网络连接出现异常,请您稍后再试。(2567963424)', '10000');

第一次获取到验证码的cookies 然后带上cookies去访问第二个登录链接,这个思路应该没问题的吧。。
发表于 2013-4-30 17:45:20 | 显示全部楼层
额  我说的是第7~
二次或多次使用Cookie的方式。。

点评

有问题请发新贴  详情 回复 发表于 2013-5-1 07:11
有问题请发新贴  详情 回复 发表于 2013-5-1 07:10
 楼主| 发表于 2013-5-1 07:10:50 | 显示全部楼层
yyhapy 发表于 2013-4-30 17:45
额  我说的是第7~
二次或多次使用Cookie的方式。。

有问题请发新贴
 楼主| 发表于 2013-5-1 07:11:52 | 显示全部楼层
yyhapy 发表于 2013-4-30 17:45
额  我说的是第7~
二次或多次使用Cookie的方式。。

有问题请发新贴
发表于 2013-5-4 14:39:03 | 显示全部楼层
BUG

警告        1        由于“System.Net.HttpStatusCode”类型的值永不等于“System.Net.HttpStatusCode?”类型的“null”,该表达式的结果始终为“true”         

  if (response.StatusCode != null)
                {
                    result.StatusCode = response.StatusCode;
                    result.StatusDescription = response.StatusDescription;
                }
条件始终成立的

这句写的无意义了吧。升级头条就是这样

点评

呵呵,写错参数了,感谢你的反馈  详情 回复 发表于 2013-5-4 19:48
 楼主| 发表于 2013-5-4 19:48:37 | 显示全部楼层
ReEnter 发表于 2013-5-4 14:39
BUG

警告        1        由于“System.Net.HttpStatusCode”类型的值永不等于“System.Net.HttpStatusCode?”类型的 ...

呵呵,写错参数了,感谢你的反馈
发表于 2013-5-16 19:42:07 | 显示全部楼层
发表于 2013-5-24 13:27:40 | 显示全部楼层
您好,用你这个能够抓取阿里巴巴数据嘛?阿里巴巴有限制,一会就要求输入验证码~这个怎么解决?
您需要登录后才可以回帖 登录 | 马上注册

本版积分规则

QQ|手机版|小黑屋|手机版|联系我们|关于我们|广告合作|苏飞论坛 ( 豫ICP备17001017号-1 )

GMT+8, 2019-2-24 14:03

© 2017-2018

快速回复 返回顶部 返回列表