using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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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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namespace Top.Api.Util
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{
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/// <summary>
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/// 网络工具类。
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/// </summary>
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public sealed class WebUtils
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{
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private int _timeout = 20000;
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private int _readWriteTimeout = 60000;
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private bool _ignoreSSLCheck = true;
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private bool _disableWebProxy = false;
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/// <summary>
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/// 等待请求开始返回的超时时间
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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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/// 等待读取数据完成的超时时间
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/// </summary>
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public int ReadWriteTimeout
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{
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get { return this._readWriteTimeout; }
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set { this._readWriteTimeout = value; }
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}
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/// <summary>
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/// 是否忽略SSL检查
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/// </summary>
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public bool IgnoreSSLCheck
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{
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get { return this._ignoreSSLCheck; }
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set { this._ignoreSSLCheck = value; }
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}
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/// <summary>
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/// 是否禁用本地代理
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/// </summary>
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public bool DisableWebProxy
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{
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get { return this._disableWebProxy; }
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set { this._disableWebProxy = 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="textParams">请求文本参数</param>
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/// <returns>HTTP响应</returns>
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public string DoPost(string url, IDictionary<string, string> textParams)
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{
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return DoPost(url, textParams, null);
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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="textParams">请求文本参数</param>
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/// <param name="headerParams">请求头部参数</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, string> headerParams)
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{
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HttpWebRequest req = GetWebRequest(url, "POST", headerParams);
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req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
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byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(textParams));
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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 = (HttpWebResponse)req.GetResponse();
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Encoding encoding = GetResponseEncoding(rsp);
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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="textParams">请求文本参数</param>
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/// <returns>HTTP响应</returns>
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public string DoGet(string url, IDictionary<string, string> textParams)
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{
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return DoGet(url, textParams, null);
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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="textParams">请求文本参数</param>
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/// <param name="headerParams">请求头部参数</param>
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/// <returns>HTTP响应</returns>
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public string DoGet(string url, IDictionary<string, string> textParams, IDictionary<string, string> headerParams)
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{
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if (textParams != null && textParams.Count > 0)
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{
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url = BuildRequestUrl(url, textParams);
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}
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HttpWebRequest req = GetWebRequest(url, "GET", headerParams);
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req.ContentType = "application/x-www-form-urlencoded;charset=gbk";
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HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
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Encoding encoding = GetResponseEncoding(rsp);
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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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/// <param name="headerParams">请求头部参数</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, IDictionary<string, string> headerParams)
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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, headerParams);
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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", headerParams);
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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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if(textParams != null)
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{
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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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foreach (KeyValuePair<string, string> kv in textParams)
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{
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string textEntry = string.Format(textTemplate, kv.Key, kv.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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}
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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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foreach (KeyValuePair<string, FileItem> kv in fileParams)
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{
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string key = kv.Key;
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FileItem fileItem = kv.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 = GetResponseEncoding(rsp);
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return GetResponseAsString(rsp, encoding);
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}
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/// <summary>
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/// 执行带body体的POST请求。
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/// </summary>
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/// <param name="url">请求地址，含URL参数</param>
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/// <param name="body">请求body体字节流</param>
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/// <param name="contentType">body内容类型</param>
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/// <param name="headerParams">请求头部参数</param>
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/// <returns>HTTP响应</returns>
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public string DoPost(string url, byte[] body, string contentType, IDictionary<string, string> headerParams)
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{
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HttpWebRequest req = GetWebRequest(url, "POST", headerParams);
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req.ContentType = contentType;
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if (body != null)
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{
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System.IO.Stream reqStream = req.GetRequestStream();
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reqStream.Write(body, 0, body.Length);
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reqStream.Close();
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}
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HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
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Encoding encoding = GetResponseEncoding(rsp);
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return GetResponseAsString(rsp, encoding);
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}
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/// <summary>
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/// 调用请求
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/// content type: application/json
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/// </summary>
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/// <returns>The post with json.</returns>
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/// <param name="url">URL.</param>
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/// <param name="textParams">Text parameters.</param>
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/// <param name="headerParams">Header parameters.</param>
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public string DoPostWithJson(string url, IDictionary<string, Object> textParams, IDictionary<string, string> headerParams)
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{
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HttpWebRequest req = GetWebRequest(url, "POST", headerParams);
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req.ContentType = "application/json;charset=utf-8";
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String body = TopUtils.ObjectToJson(textParams, new FastJSON.JSONParameters() { UseApiNamingStyle = false, UseExtensions = false, SerializeNullValues = false });
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byte[] postData = Encoding.UTF8.GetBytes(body);
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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 = (HttpWebResponse)req.GetResponse();
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Encoding encoding = GetResponseEncoding(rsp);
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return GetResponseAsString(rsp, encoding);
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}
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public HttpWebRequest GetWebRequest(string url, string method, IDictionary<string, string> headerParams)
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{
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HttpWebRequest req = null;
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if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
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{
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if (this._ignoreSSLCheck)
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{
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ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(TrustAllValidationCallback);
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}
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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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if (this._disableWebProxy)
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{
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req.Proxy = null;
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}
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if (headerParams != null && headerParams.Count > 0)
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{
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foreach (string key in headerParams.Keys)
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{
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req.Headers.Add(key, headerParams[key]);
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}
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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 = "top-sdk-net";
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req.Accept = "text/xml,text/javascript";
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req.Timeout = this._timeout;
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req.ReadWriteTimeout = this._readWriteTimeout;
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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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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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if (Constants.CONTENT_ENCODING_GZIP.Equals(rsp.ContentEncoding, StringComparison.OrdinalIgnoreCase))
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{
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stream = new GZipStream(stream, CompressionMode.Decompress);
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}
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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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/// 组装含参数的请求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">请求参数映射</param>
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/// <returns>带参数的请求URL</returns>
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public static string BuildRequestUrl(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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return BuildRequestUrl(url, BuildQuery(parameters));
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}
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return url;
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}
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/// <summary>
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/// 组装含参数的请求URL。
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/// </summary>
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/// <param name="url">请求地址</param>
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/// <param name="queries">一个或多个经过URL编码后的请求参数串</param>
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/// <returns>带参数的请求URL</returns>
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public static string BuildRequestUrl(string url, params string[] queries)
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{
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if (queries == null || queries.Length == 0)
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{
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return url;
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}
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StringBuilder newUrl = new StringBuilder(url);
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bool hasQuery = url.Contains("?");
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bool hasPrepend = url.EndsWith("?") || url.EndsWith("&");
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foreach (string query in queries)
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{
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if (!string.IsNullOrEmpty(query))
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{
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if (!hasPrepend)
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{
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if (hasQuery)
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{
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newUrl.Append("&");
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}
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else
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{
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newUrl.Append("?");
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hasQuery = true;
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}
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}
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newUrl.Append(query);
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hasPrepend = false;
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}
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}
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return newUrl.ToString();
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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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if (parameters == null || parameters.Count == 0)
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{
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return null;
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}
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StringBuilder query = new StringBuilder();
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bool hasParam = false;
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foreach (KeyValuePair<string, string> kv in parameters)
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{
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string name = kv.Key;
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string value = kv.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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query.Append("&");
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}
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query.Append(name);
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query.Append("=");
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query.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 query.ToString();
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}
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private Encoding GetResponseEncoding(HttpWebResponse rsp)
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{
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string charset = rsp.CharacterSet;
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if (string.IsNullOrEmpty(charset))
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{
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charset = Constants.CHARSET_UTF8;
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}
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return Encoding.GetEncoding(charset);
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}
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private static bool TrustAllValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
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{
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return true; // 忽略SSL证书检查
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}
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}
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}
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