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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Web;
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using System.IO;
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using System.Net;
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using System.Text;
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using System.Net.Security;
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using System.Security.Cryptography.X509Certificates;
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namespace HuizhongLibrary
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{
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/// <summary>
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/// 表单数据项
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/// </summary>
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public class FormItemModel
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{
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/// <summary>
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/// 表单键，request["key"]
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/// </summary>
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public string Key { set; get; }
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/// <summary>
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/// 表单值,上传文件时忽略，request["key"].value
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/// </summary>
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public string Value { set; get; }
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/// <summary>
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/// 是否是文件
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/// </summary>
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public bool IsFile
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{
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get
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{
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if (FileContent == null || FileContent.Length == 0)
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return false;
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if (FileContent != null && FileContent.Length > 0 && string.IsNullOrWhiteSpace(FileName))
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throw new Exception("上传文件时 FileName 属性值不能为空");
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return true;
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}
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}
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/// <summary>
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/// 上传的文件名
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/// </summary>
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public string FileName { set; get; }
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/// <summary>
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/// 上传的文件内容
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/// </summary>
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public Stream FileContent { set; get; }
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}
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public class HttpFormData
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{
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// https
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private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
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private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
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{
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return true; //总是接受
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}
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/// <summary>
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/// 使用Post方法获取字符串结果
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/// </summary>
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/// <param name="url"></param>
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/// <param name="formItems">Post表单内容</param>
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/// <param name="cookieContainer"></param>
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/// <param name="timeOut">默认20秒</param>
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/// <param name="encoding">响应内容的编码类型（默认utf-8）</param>
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/// <returns></returns>
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public static string PostForm(string url, string Head, List<FormItemModel> formItems, CookieContainer cookieContainer = null, string refererUrl = null, Encoding encoding = null, int timeOut = 20000)
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{
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HttpWebRequest request = null;
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//HTTPSQ请求
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if (url.Substring(0, 8) == "https://")
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{
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ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
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}
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request = WebRequest.Create(url) as HttpWebRequest;
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request.ProtocolVersion = HttpVersion.Version10;
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#region 初始化请求对象
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request.Method = "POST";
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request.Timeout = timeOut;
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if (Head != null && Head != "")
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request.Headers.Add(Head);
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//request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
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request.KeepAlive = true;
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//request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36";
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if (!string.IsNullOrEmpty(refererUrl))
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request.Referer = refererUrl;
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if (cookieContainer != null)
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request.CookieContainer = cookieContainer;
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#endregion
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string boundary = "----" + DateTime.Now.Ticks.ToString("x");//分隔符
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request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
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//请求流
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var postStream = new MemoryStream();
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#region 处理Form表单请求内容
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//是否用Form上传文件
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var formUploadFile = formItems != null && formItems.Count > 0;
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if (formUploadFile)
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{
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//文件数据模板
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string fileFormdataTemplate =
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"\r\n--" + boundary +
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"\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" +
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"\r\nContent-Type: multipart/form-data" +
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"\r\n\r\n";
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//文本数据模板
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string dataFormdataTemplate =
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"\r\n--" + boundary +
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"\r\nContent-Disposition: form-data; name=\"{0}\"" +
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"\r\n\r\n{1}";
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foreach (var item in formItems)
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{
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string formdata = null;
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if (item.IsFile)
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{
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//上传文件
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formdata = string.Format(
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fileFormdataTemplate,
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item.Key, //表单键
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item.FileName);
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}
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else
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{
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//上传文本
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formdata = string.Format(
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dataFormdataTemplate,
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item.Key,
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item.Value);
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}
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//统一处理
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byte[] formdataBytes = null;
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//第一行不需要换行
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if (postStream.Length == 0)
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formdataBytes = Encoding.UTF8.GetBytes(formdata.Substring(2, formdata.Length - 2));
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else
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formdataBytes = Encoding.UTF8.GetBytes(formdata);
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postStream.Write(formdataBytes, 0, formdataBytes.Length);
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//写入文件内容
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if (item.FileContent != null && item.FileContent.Length > 0)
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{
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using (var stream = item.FileContent)
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{
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byte[] buffer = new byte[1024];
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int bytesRead = 0;
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while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0)
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{
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postStream.Write(buffer, 0, bytesRead);
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}
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}
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}
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}
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//结尾
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var footer = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
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postStream.Write(footer, 0, footer.Length);
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}
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else
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{
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request.ContentType = "application/json;charset=UTF-8";
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}
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#endregion
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request.ContentLength = postStream.Length;
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#region 输入二进制流
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if (postStream != null)
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{
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postStream.Position = 0;
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//直接写入流
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Stream requestStream = request.GetRequestStream();
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byte[] buffer = new byte[1024];
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int bytesRead = 0;
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while ((bytesRead = postStream.Read(buffer, 0, buffer.Length)) != 0)
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{
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requestStream.Write(buffer, 0, bytesRead);
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}
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////debug
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//postStream.Seek(0, SeekOrigin.Begin);
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//StreamReader sr = new StreamReader(postStream);
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//var postStr = sr.ReadToEnd();
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postStream.Close();//关闭文件访问
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}
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#endregion
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HttpWebResponse response = (HttpWebResponse)request.GetResponse();
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if (cookieContainer != null)
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{
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response.Cookies = cookieContainer.GetCookies(response.ResponseUri);
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}
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using (Stream responseStream = response.GetResponseStream())
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{
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using (StreamReader myStreamReader = new StreamReader(responseStream, encoding ?? Encoding.UTF8))
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{
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string retString = myStreamReader.ReadToEnd();
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return retString;
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}
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}
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}
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/// <summary>
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/// 使用Post方法获取字符串结果
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/// </summary>
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/// <param name="url"></param>
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/// <param name="formItems">Post表单内容</param>
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/// <param name="cookieContainer"></param>
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/// <param name="timeOut">默认20秒</param>
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/// <param name="encoding">响应内容的编码类型（默认utf-8）</param>
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/// <returns></returns>
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public static string PostForm(string url,List<string> Head, List<FormItemModel> formItems, CookieContainer cookieContainer = null, string refererUrl = null, Encoding encoding = null, int timeOut = 20000)
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{
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HttpWebRequest request = null;
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//HTTPSQ请求
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if (url.Substring(0, 8) == "https://")
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{
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ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
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}
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request = WebRequest.Create(url) as HttpWebRequest;
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request.ProtocolVersion = HttpVersion.Version10;
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#region 初始化请求对象
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request.Method = "POST";
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request.Timeout = timeOut;
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//if(Head!=null&& Head!="")
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//request.Headers.Add(Head);
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if (Head != null)
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{
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foreach (string strHead in Head)
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{
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request.Headers.Add(strHead);
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}
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}
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//request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
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request.KeepAlive = true;
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//request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36";
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if (!string.IsNullOrEmpty(refererUrl))
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request.Referer = refererUrl;
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if (cookieContainer != null)
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request.CookieContainer = cookieContainer;
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#endregion
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string boundary = "----" + DateTime.Now.Ticks.ToString("x");//分隔符
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request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
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//请求流
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var postStream = new MemoryStream();
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#region 处理Form表单请求内容
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//是否用Form上传文件
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var formUploadFile = formItems != null && formItems.Count > 0;
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if (formUploadFile)
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{
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//文件数据模板
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string fileFormdataTemplate =
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"\r\n--" + boundary +
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"\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" +
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"\r\nContent-Type: multipart/form-data" +
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"\r\n\r\n";
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//文本数据模板
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string dataFormdataTemplate =
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"\r\n--" + boundary +
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"\r\nContent-Disposition: form-data; name=\"{0}\"" +
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"\r\n\r\n{1}";
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foreach (var item in formItems)
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{
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string formdata = null;
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if (item.IsFile)
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{
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//上传文件
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formdata = string.Format(
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fileFormdataTemplate,
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item.Key, //表单键
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item.FileName);
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}
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else
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{
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//上传文本
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formdata = string.Format(
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dataFormdataTemplate,
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item.Key,
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item.Value);
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}
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//统一处理
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byte[] formdataBytes = null;
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//第一行不需要换行
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if (postStream.Length == 0)
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formdataBytes = Encoding.UTF8.GetBytes(formdata.Substring(2, formdata.Length - 2));
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else
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formdataBytes = Encoding.UTF8.GetBytes(formdata);
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postStream.Write(formdataBytes, 0, formdataBytes.Length);
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//写入文件内容
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if (item.FileContent != null && item.FileContent.Length > 0)
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{
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using (var stream = item.FileContent)
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{
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byte[] buffer = new byte[1024];
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int bytesRead = 0;
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while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0)
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{
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postStream.Write(buffer, 0, bytesRead);
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}
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}
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}
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}
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//结尾
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var footer = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
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postStream.Write(footer, 0, footer.Length);
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}
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else
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{
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request.ContentType = "application/json;charset=UTF-8";
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}
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#endregion
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request.ContentLength = postStream.Length;
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#region 输入二进制流
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if (postStream != null)
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{
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postStream.Position = 0;
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//直接写入流
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Stream requestStream = request.GetRequestStream();
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byte[] buffer = new byte[1024];
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int bytesRead = 0;
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while ((bytesRead = postStream.Read(buffer, 0, buffer.Length)) != 0)
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{
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requestStream.Write(buffer, 0, bytesRead);
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}
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////debug
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//postStream.Seek(0, SeekOrigin.Begin);
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//StreamReader sr = new StreamReader(postStream);
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//var postStr = sr.ReadToEnd();
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postStream.Close();//关闭文件访问
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}
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#endregion
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HttpWebResponse response = (HttpWebResponse)request.GetResponse();
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if (cookieContainer != null)
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{
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response.Cookies = cookieContainer.GetCookies(response.ResponseUri);
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}
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using (Stream responseStream = response.GetResponseStream())
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{
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using (StreamReader myStreamReader = new StreamReader(responseStream, encoding ?? Encoding.UTF8))
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{
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string retString = myStreamReader.ReadToEnd();
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return retString;
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}
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}
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}
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}
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}
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