using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Net;
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using System.Net.Security;
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using System.Security.Cryptography.X509Certificates;
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using System.Text;
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using System.Web;
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using Top.Api.Util;
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namespace Aliyun.Api.Util
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{
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public class AliyunWebUtils
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{
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private int _timeout = 100000;
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/// <summary>
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/// 请求与响应的超时时间
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/// </summary>
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public int Timeout
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{
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get { return this._timeout; }
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set { this._timeout = value; }
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}
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/// <summary>
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/// 执行HTTP POST请求。
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/// </summary>
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/// <param name="url">请求地址</param>
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/// <param name="parameters">请求参数</param>
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/// <returns>HTTP响应</returns>
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public string DoPost(string url, IDictionary<string, string> parameters)
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{
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HttpWebRequest req = GetWebRequest(url, "POST");
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req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
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byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(parameters));
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System.IO.Stream reqStream = req.GetRequestStream();
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reqStream.Write(postData, 0, postData.Length);
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reqStream.Close();
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HttpWebResponse rsp = null;
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try
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{
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rsp = (HttpWebResponse)req.GetResponse();
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}
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catch (WebException ex)
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{
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WebResponse wr = ex.Response;
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System.IO.Stream st = wr.GetResponseStream();
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StreamReader sr = new StreamReader(st, System.Text.Encoding.Default);
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string sError = sr.ReadToEnd();
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sr.Close();
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st.Close();
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return sError;
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}
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Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
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return GetResponseAsString(rsp, encoding);
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}
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/// <summary>
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/// 执行HTTP GET请求。
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/// </summary>
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/// <param name="url">请求地址</param>
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/// <param name="parameters">请求参数</param>
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/// <returns>HTTP响应</returns>
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public string DoGet(string url, IDictionary<string, string> parameters)
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{
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if (parameters != null && parameters.Count > 0)
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{
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if (url.Contains("?"))
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{
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url = url + "&" + BuildQuery(parameters);
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}
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else
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{
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url = url + "?" + BuildQuery(parameters);
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}
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}
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HttpWebRequest req = GetWebRequest(url, "GET");
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req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
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HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
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Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
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return GetResponseAsString(rsp, encoding);
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}
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/// <summary>
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/// 执行带文件上传的HTTP POST请求。
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/// </summary>
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/// <param name="url">请求地址</param>
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/// <param name="textParams">请求文本参数</param>
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/// <param name="fileParams">请求文件参数</param>
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/// <returns>HTTP响应</returns>
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public string DoPost(string url, IDictionary<string, string> textParams, IDictionary<string, FileItem> fileParams)
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{
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// 如果没有文件参数，则走普通POST请求
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if (fileParams == null || fileParams.Count == 0)
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{
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return DoPost(url, textParams);
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}
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string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
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HttpWebRequest req = GetWebRequest(url, "POST");
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req.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
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System.IO.Stream reqStream = req.GetRequestStream();
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byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
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byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
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// 组装文本请求参数
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string textTemplate = "Content-Disposition:form-data;name=\"{0}\"\r\nContent-Type:text/plain\r\n\r\n{1}";
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IEnumerator<KeyValuePair<string, string>> textEnum = textParams.GetEnumerator();
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while (textEnum.MoveNext())
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{
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string textEntry = string.Format(textTemplate, textEnum.Current.Key, textEnum.Current.Value);
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byte[] itemBytes = Encoding.UTF8.GetBytes(textEntry);
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reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
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reqStream.Write(itemBytes, 0, itemBytes.Length);
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}
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// 组装文件请求参数
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string fileTemplate = "Content-Disposition:form-data;name=\"{0}\";filename=\"{1}\"\r\nContent-Type:{2}\r\n\r\n";
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IEnumerator<KeyValuePair<string, FileItem>> fileEnum = fileParams.GetEnumerator();
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while (fileEnum.MoveNext())
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{
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string key = fileEnum.Current.Key;
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FileItem fileItem = fileEnum.Current.Value;
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if (!fileItem.IsValid())
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{
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throw new ArgumentException("FileItem is invalid");
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}
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string fileEntry = string.Format(fileTemplate, key, fileItem.GetFileName(), fileItem.GetMimeType());
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byte[] itemBytes = Encoding.UTF8.GetBytes(fileEntry);
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reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
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reqStream.Write(itemBytes, 0, itemBytes.Length);
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fileItem.Write(reqStream);
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}
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reqStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
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reqStream.Close();
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HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
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Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
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return GetResponseAsString(rsp, encoding);
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}
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public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
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{ //直接确认，否则打不开
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return true;
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}
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public HttpWebRequest GetWebRequest(string url, string method)
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{
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HttpWebRequest req = null;
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if (url.Contains("https"))
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{
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ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
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req = (HttpWebRequest)WebRequest.CreateDefault(new Uri(url));
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}
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else
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{
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req = (HttpWebRequest)WebRequest.Create(url);
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}
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req.ServicePoint.Expect100Continue = false;
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req.Method = method;
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req.KeepAlive = true;
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req.UserAgent = "Top4Net";
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req.Timeout = this._timeout;
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return req;
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}
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/// <summary>
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/// 把响应流转换为文本。
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/// </summary>
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/// <param name="rsp">响应流对象</param>
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/// <param name="encoding">编码方式</param>
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/// <returns>响应文本</returns>
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public string GetResponseAsString(HttpWebResponse rsp, Encoding encoding)
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{
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System.IO.Stream stream = null;
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StreamReader reader = null;
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try
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{
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// 以字符流的方式读取HTTP响应
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stream = rsp.GetResponseStream();
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reader = new StreamReader(stream, encoding);
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return reader.ReadToEnd();
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}
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finally
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{
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// 释放资源
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if (reader != null) reader.Close();
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if (stream != null) stream.Close();
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if (rsp != null) rsp.Close();
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}
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}
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/// <summary>
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/// 组装GET请求URL。
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/// </summary>
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/// <param name="url">请求地址</param>
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/// <param name="parameters">请求参数</param>
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/// <returns>带参数的GET请求URL</returns>
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public string BuildGetUrl(string url, IDictionary<string, string> parameters)
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{
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if (parameters != null && parameters.Count > 0)
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{
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if (url.Contains("?"))
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{
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url = url + "&" + BuildQuery(parameters);
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}
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else
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{
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url = url + "?" + BuildQuery(parameters);
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}
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}
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return url;
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}
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/// <summary>
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/// 组装普通文本请求参数。
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/// </summary>
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/// <param name="parameters">Key-Value形式请求参数字典</param>
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/// <returns>URL编码后的请求数据</returns>
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public static string BuildQuery(IDictionary<string, string> parameters)
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{
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StringBuilder postData = new StringBuilder();
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bool hasParam = false;
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IEnumerator<KeyValuePair<string, string>> dem = parameters.GetEnumerator();
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while (dem.MoveNext())
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{
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string name = dem.Current.Key;
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string value = dem.Current.Value;
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// 忽略参数名或参数值为空的参数
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if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
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{
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if (hasParam)
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{
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postData.Append("&");
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}
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postData.Append(name);
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postData.Append("=");
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postData.Append(HttpUtility.UrlEncode(value, Encoding.UTF8));
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hasParam = true;
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}
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}
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return postData.ToString();
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}
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}
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}
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