/// <summary>/// 用于以 POST 方式向目标地址提交表达数据/// 使用 application/x-www-form-urlencoded 编码方式/// 不支持上传文件, 若上传文件, 请使用<see cref="HttpPostFileRequestClient"/>/// </summary>public sealed class HttpPostRequestClient{#region - Private -private List<KeyValuePair<string, string>> _postDatas;#endregion/// <summary>/// 获取或设置数据字符编码, 默认使用<see cref="System.Text.Encoding.UTF8"/>/// </summary>public Encoding Encoding { get; set; } = Encoding.UTF8;/// <summary>/// 获取或设置 UserAgent/// </summary>public string UserAgent { get; set; } = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36";/// <summary>/// 获取或设置 Accept/// </summary>public string Accept { get; set; } = "*/*";/// <summary>/// 获取或设置 Referer/// </summary>public string Referer { get; set; }/// <summary>/// 获取或设置 Cookie 容器/// </summary>public CookieContainer CookieContainer { get; set; } = new CookieContainer();/// <summary>/// 初始化一个用于以 POST 方式向目标地址提交不包含文件表单数据<see cref="HttpPostRequestClient"/>实例/// </summary>public HttpPostRequestClient(){this._postDatas = new List<KeyValuePair<string, string>>();}/// <summary>/// 设置表单数据字段, 用于存放文本类型数据/// </summary>/// <param name="fieldName">指定的字段名称</param>/// <param name="fieldValue">指定的字段值</param>public void SetField(string fieldName, string fieldValue){this._postDatas.Add(new KeyValuePair<string, string>(fieldName, fieldValue));}/// <summary>/// 以POST方式向目标地址提交表单数据/// </summary>/// <param name="url">目标地址, http(s)://sample.com</param>/// <returns>目标地址的响应</returns>public HttpWebResponse Post(string url){if (string.IsNullOrWhiteSpace(url))throw new ArgumentNullException(nameof(url));HttpWebRequest request = null;if (url.ToLowerInvariant().StartsWith("https")){request = WebRequest.Create(url) as HttpWebRequest;ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((s, c, ch, ss) => { return true; });request.ProtocolVersion = HttpVersion.Version11;ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;request.KeepAlive = true;ServicePointManager.CheckCertificateRevocationList = true; ServicePointManager.DefaultConnectionLimit = 100;ServicePointManager.Expect100Continue = false;}else{request = WebRequest.Create(url) as HttpWebRequest;}request.Method = "POST";request.ContentType = "application/x-www-form-urlencoded";request.UserAgent = this.UserAgent;request.Accept = this.Accept;request.Referer = this.Referer;request.CookieContainer = this.CookieContainer;var postData = string.Join("&", this._postDatas.Select(p => $"{p.Key}={p.Value}"));using(var requestStream = request.GetRequestStream()){var bytes = this.Encoding.GetBytes(postData);requestStream.Write(bytes, 0, bytes.Length);}return request.GetResponse() as HttpWebResponse;}/// <summary>/// 以POST方式向目标地址提交表单数据/// </summary>/// <param name="url">目标地址, http(s)://sample.com</param>/// <returns>目标地址的响应</returns>public async Task<HttpWebResponse> PostAsync(string url){if (string.IsNullOrWhiteSpace(url))throw new ArgumentNullException(nameof(url));HttpWebRequest request = null;if (url.ToLowerInvariant().StartsWith("https")){request = WebRequest.Create(url) as HttpWebRequest;ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((s, c, ch, ss) => { return true; });request.ProtocolVersion = HttpVersion.Version11;ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;request.KeepAlive = true;ServicePointManager.CheckCertificateRevocationList = true; ServicePointManager.DefaultConnectionLimit = 100;ServicePointManager.Expect100Continue = false;}else{request = WebRequest.Create(url) as HttpWebRequest;}request.Method = "POST";request.ContentType = "application/x-www-form-urlencoded";request.UserAgent = this.UserAgent;request.Accept = this.Accept;request.Referer = this.Referer;request.CookieContainer = this.CookieContainer;var postData = string.Join("&", this._postDatas.Select(p => $"{p.Key}={p.Value}"));using (var requestStream = await request.GetRequestStreamAsync()){var bytes = this.Encoding.GetBytes(postData);requestStream.Write(bytes, 0, bytes.Length);}return await request.GetResponseAsync() as HttpWebResponse;}}

    /// <summary>/// 用于以 POST 方式向目标地址提交表单数据, 仅适用于包含文件的请求/// </summary>public sealed class HttpPostFileRequestClient{#region - Private -private string _boundary;private List<byte[]> _postDatas;#endregion/// <summary>/// 获取或设置数据字符编码, 默认使用<see cref="System.Text.Encoding.UTF8"/>/// </summary>public Encoding Encoding { get; set; } = Encoding.UTF8;/// <summary>/// 获取或设置 UserAgent/// </summary>public string UserAgent { get; set; } = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36";/// <summary>/// 获取或设置 Accept/// </summary>public string Accept { get; set; } = "*/*";/// <summary>/// 获取或设置 Referer/// </summary>public string Referer { get; set; }/// <summary>/// 获取或设置 Cookie 容器/// </summary>public CookieContainer CookieContainer { get; set; } = new CookieContainer();/// <summary>/// 初始化一个用于以 POST 方式向目标地址提交表单数据的<see cref="HttpPostFileRequestClient"/>实例/// </summary>public HttpPostFileRequestClient(){this._boundary = DateTime.Now.Ticks.ToString("X");this._postDatas = new List<byte[]>();}/// <summary>/// 设置表单数据字段, 用于存放文本类型数据/// </summary>/// <param name="fieldName">指定的字段名称</param>/// <param name="fieldValue">指定的字段值</param>public void SetField(string fieldName, string fieldValue){var field = $"--{this._boundary}\r\n" +$"Content-Disposition: form-data;name=\"{fieldName}\"\r\n\r\n" +$"{fieldValue}\r\n";this._postDatas.Add(this.Encoding.GetBytes(field));}/// <summary>/// 设置表单数据字段, 用于文件类型数据/// </summary>/// <param name="fieldName">字段名称</param>/// <param name="fileName">文件名</param>/// <param name="contentType">内容类型, 传入 null 将默认使用 application/octet-stream</param>/// <param name="fs">文件流</param>public void SetField(string fieldName, string fileName, string contentType, Stream fs){var fileBytes = new byte[fs.Length];using (fs){fs.Read(fileBytes, 0, fileBytes.Length);}SetField(fieldName, fileName, contentType, fileBytes);}/// <summary>/// 设置表单数据字段, 用于文件类型数据/// </summary>/// <param name="fieldName">字段名称</param>/// <param name="fileName">文件名</param>/// <param name="contentType">内容类型, 传入 null 将默认使用 application/octet-stream</param>/// <param name="fileBytes">文件字节数组</param>public void SetField(string fieldName, string fileName, string contentType, byte[] fileBytes){var field = $"--{this._boundary}\r\n" +$"Content-Disposition: form-data; name=\"{fieldName}\";filename=\"{fileName}\"\r\n" +$"Content-Type:{contentType ?? "application/octet-stream"}\r\n\r\n";this._postDatas.Add(this.Encoding.GetBytes(field));this._postDatas.Add(fileBytes);this._postDatas.Add(this.Encoding.GetBytes("\r\n"));}/// <summary>/// 以POST方式向目标地址提交表单数据/// </summary>/// <param name="url">目标地址, http(s)://sample.com</param>/// <returns>目标地址的响应</returns>public HttpWebResponse Post(string url){if (string.IsNullOrWhiteSpace(url))throw new ArgumentNullException(nameof(url));HttpWebRequest request = null;if (url.ToLowerInvariant().StartsWith("https")){request = WebRequest.Create(url) as HttpWebRequest;ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((s, c, ch, ss) => { return true; });request.ProtocolVersion = HttpVersion.Version11;ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;request.KeepAlive = true;ServicePointManager.CheckCertificateRevocationList = true; ServicePointManager.DefaultConnectionLimit = 100;ServicePointManager.Expect100Continue = false;}else{request = WebRequest.Create(url) as HttpWebRequest;}request.Method = "POST";request.ContentType = "multipart/form-data;boundary=" + _boundary;request.UserAgent = this.UserAgent;request.Accept = this.Accept;request.Referer = this.Referer;request.CookieContainer = this.CookieContainer;var end = $"--{this._boundary}--\r\n";this._postDatas.Add(this.Encoding.GetBytes(end));var requestStream = request.GetRequestStream();foreach (var item in this._postDatas){requestStream.Write(item, 0, item.Length);}return request.GetResponse() as HttpWebResponse;}/// <summary>/// 以POST方式向目标地址提交表单数据/// </summary>/// <param name="url">目标地址, http(s)://sample.com</param>/// <returns>目标地址的响应</returns>public async Task<HttpWebResponse> PostAsync(string url){if (string.IsNullOrWhiteSpace(url))throw new ArgumentNullException(nameof(url));HttpWebRequest request = null;if (url.ToLowerInvariant().StartsWith("https")){request = WebRequest.Create(url) as HttpWebRequest;ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((s, c, ch, ss) => { return true; });request.ProtocolVersion = HttpVersion.Version11;ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;request.KeepAlive = true;ServicePointManager.CheckCertificateRevocationList = true; ServicePointManager.DefaultConnectionLimit = 100;ServicePointManager.Expect100Continue = false;}else{request = WebRequest.Create(url) as HttpWebRequest;}request.Method = "POST";request.ContentType = "multipart/form-data;boundary=" + _boundary;request.UserAgent = this.UserAgent;request.Accept = this.Accept;request.Referer = this.Referer;request.CookieContainer = this.CookieContainer;var end = $"--{this._boundary}--\r\n";this._postDatas.Add(this.Encoding.GetBytes(end));var requestStream = await request.GetRequestStreamAsync();foreach (var item in this._postDatas){await requestStream.WriteAsync(item, 0, item.Length);}return await request.GetResponseAsync() as HttpWebResponse;}}