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osscore
297 lines
9.8 KiB
C#
297 lines
9.8 KiB
C#
#region Copyright (C) 2016 Kevin (OSS开源系列) 公众号：osscore
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/***************************************************************************
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* 文件功能描述：Http请求 == 主请求实体
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*
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* 创建人： Kevin
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* 创建人Email：1985088337@qq.com
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*
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*****************************************************************************/
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#endregion
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using System;
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using System.IO;
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using System.Net.Http;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using OSS.Tools.Http.Mos;
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namespace OSS.Tools.Http.Extention
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{
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/// <summary>
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/// 请求基类
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/// </summary>
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public static class HttpClientExtention
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{
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private const string _lineBreak = "\r\n";
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/// <summary>
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/// 编码格式
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/// </summary>
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public static Encoding Encoding { get; set; } = Encoding.UTF8;
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//private static readonly Dictionary<string,Action<HttpContentHeaders,string>> _notCanAddContentHeaderDics
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// =new Dictionary<string, Action<HttpContentHeaders, string>>();
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#region 扩展方法
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/// <summary>
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/// 发送Post请求
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/// </summary>
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/// <param name="request">请求的参数</param>
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/// <param name="client"></param>
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/// <returns>自定义的Response结果</returns>
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public static Task<HttpResponseMessage> PostAsync(this HttpClient client, OssHttpRequest request)
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{
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request.HttpMethod = HttpMethod.Post;
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return RestSend(client, request);
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}
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/// <summary>
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/// 发送Get请求
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/// </summary>
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/// <param name="request">请求的参数</param>
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/// <param name="client"></param>
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/// <returns>自定义的Response结果</returns>
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public static Task<HttpResponseMessage> GetAsync(this HttpClient client, OssHttpRequest request)
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{
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request.HttpMethod = HttpMethod.Get;
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return RestSend(client,request);
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}
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/// <summary>
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/// 执行请求方法
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/// </summary>
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/// <param name="client"></param>
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/// <param name="request"></param>
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/// <returns></returns>
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public static Task<HttpResponseMessage> RestSend(this HttpClient client, OssHttpRequest request)
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{
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return RestSend(client, request, HttpCompletionOption.ResponseContentRead, CancellationToken.None);
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}
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/// <summary>
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/// 执行请求方法
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/// </summary>
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/// <param name="client"></param>
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/// <param name="request"></param>
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/// <param name="completionOption"></param>
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/// <returns></returns>
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public static Task<HttpResponseMessage> RestSend(this HttpClient client, OssHttpRequest request,
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HttpCompletionOption completionOption)
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{
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return RestSend(client, request, completionOption, CancellationToken.None);
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}
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/// <summary>
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/// 执行请求方法
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/// </summary>
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/// <param name="client"></param>
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/// <param name="request"></param>
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/// <param name="completionOption"></param>
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/// <param name="cancellationToken"></param>
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/// <returns></returns>
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public static Task<HttpResponseMessage> RestSend(this HttpClient client, OssHttpRequest request,
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HttpCompletionOption completionOption ,
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CancellationToken cancellationToken)
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{
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var reqMsg = new HttpRequestMessage
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{
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RequestUri = string.IsNullOrEmpty(request.AddressUrl) ? request.Uri : new Uri(request.AddressUrl),
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Method = request.HttpMethod
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};
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ConfigReqContent(reqMsg, request); // 配置内容
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return client.SendAsync(reqMsg, completionOption, cancellationToken);
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}
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#endregion
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#region 配置 ReqMsg信息
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/// <summary>
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/// 配置使用的content
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/// </summary>
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/// <param name="reqMsg"></param>
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/// <param name="req"></param>
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/// <returns></returns>
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private static void ConfigReqContent(HttpRequestMessage reqMsg, OssHttpRequest req)
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{
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if (req.HttpMethod == HttpMethod.Get)
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{
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req.RequestSet?.Invoke(reqMsg);
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return;
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}
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if (req.HasFile)
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{
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var boundary =GetBoundary();
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var memory=new MemoryStream();
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WriteMultipartFormData(memory, req, boundary);
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memory.Seek(0, SeekOrigin.Begin);//设置指针到起点
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reqMsg.Content = new StreamContent(memory);
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req.RequestSet?.Invoke(reqMsg);
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reqMsg.Content.Headers.Remove("Content-Type");
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reqMsg.Content.Headers.TryAddWithoutValidation("Content-Type", $"multipart/form-data;boundary={boundary}");
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}
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else
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{
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var data = GetNormalFormData(req);
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reqMsg.Content = new StringContent(data);
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req.RequestSet?.Invoke(reqMsg);
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}
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}
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#endregion
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#region 请求数据的 内容 处理
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#region 处理带文件上传的数据处理
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/// <summary>
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/// 写入 Form 的内容值 【 非文件参数 + 文件头 + 文件参数（内部完成） + 请求结束符 】
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/// </summary>
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/// <param name="memory"></param>
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/// <param name="request"></param>
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/// <param name="boundary"></param>
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private static void WriteMultipartFormData(Stream memory, OssHttpRequest request, string boundary)
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{
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if (request.FormParameters!=null)
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{
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foreach (var param in request.FormParameters)
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{
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WriteStringTo(memory, GetMultipartFormData(param, boundary));
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}
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}
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foreach (var file in request.FileParameters)
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{
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//文件头
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WriteStringTo(memory, GetMultipartFileHeader(file, boundary));
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//文件内容
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file.Writer(memory);
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//文件结尾
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WriteStringTo(memory, _lineBreak);
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}
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//写入整个请求的底部信息
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WriteStringTo(memory, GetMultipartFooter(boundary));
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}
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/// <summary>
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/// 写入 Form 的内容值（文件头）
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/// </summary>
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/// <param name="file"></param>
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/// <param name="boundary"></param>
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/// <returns></returns>
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private static string GetMultipartFileHeader(FileParameter file, string boundary)
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{
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var conType = file.ContentType ?? "application/octet-stream";
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return $"--{boundary}{_lineBreak}Content-Disposition: form-data; name=\"{file.Name}\"; filename=\"{file.FileName}\"{_lineBreak}Content-Type: {conType}{_lineBreak}{_lineBreak}";
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}
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/// <summary>
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/// 写入 Form 的内容值（非文件参数）
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/// </summary>
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/// <param name="param"></param>
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/// <param name="boundary"></param>
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/// <returns></returns>
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private static string GetMultipartFormData(FormParameter param, string boundary)
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{
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return
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$"--{boundary}{_lineBreak}Content-Disposition: form-data; name=\"{param.Name}\"{_lineBreak}{_lineBreak}{param.Value}{_lineBreak}";
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}
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/// <summary>
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/// 写入 Form 的内容值 （请求结束符）
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/// </summary>
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/// <param name="boundary"></param>
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/// <returns></returns>
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private static string GetMultipartFooter(string boundary)
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{
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return $"--{boundary}--{_lineBreak}";
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}
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#endregion
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#region 不包含文件的数据处理（正常 get/post 请求）
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/// <summary>
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/// 写入请求的内容信息 （非文件上传请求）
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/// </summary>
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/// <param name="request"></param>
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/// <returns></returns>
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private static string GetNormalFormData(OssHttpRequest request)
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{
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var formstring = new StringBuilder();
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if (request.FormParameters!=null)
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{
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foreach (var p in request.FormParameters)
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{
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if (formstring.Length > 1)
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formstring.Append("&");
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formstring.AppendFormat(p.ToString());
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}
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}
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if (string.IsNullOrEmpty(request.CustomBody)) return formstring.ToString();
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if (formstring.Length > 1)
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formstring.Append("&");
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formstring.Append(request.CustomBody);
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return formstring.ToString();
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}
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#endregion
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#endregion
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#region 请求辅助方法
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/// <summary>
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/// 写入数据方法（将数据写入 webrequest）
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/// </summary>
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/// <param name="stream"></param>
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/// <param name="toWrite"></param>
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/// <returns>写入的字节数量</returns>
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private static void WriteStringTo(Stream stream, string toWrite)
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{
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var bytes = Encoding.GetBytes(toWrite);
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stream.Write(bytes, 0, bytes.Length);
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}
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/// <summary>
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/// 创建 请求 分割界限
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/// </summary>
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/// <returns></returns>
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private static string GetBoundary()
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{
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const string pattern = "abcdefghijklmnopqrstuvwxyz0123456789";
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var boundaryBuilder = new StringBuilder();
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var rnd = new Random();
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for (var i = 0; i < 10; i++)
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{
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var index = rnd.Next(pattern.Length);
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boundaryBuilder.Append(pattern[index]);
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}
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return $"-------{boundaryBuilder}";
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}
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#endregion
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}
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}
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