0
点赞
收藏
分享

微信扫一扫

C# HttpWebRequest 上传大文件

豆丁趣 2022-04-02 阅读 127
http

*
*
*、

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace WinFormsApp
{

    /// <summary>
    /// C# HttpWebRequest 上传大文件
    /// </summary>
    public class Class1
    {
        public static string ExecutePost(UploadParameterType parameter)
        {
            using (MemoryStream memoryStream = new MemoryStream())
            {
                // 1.分界线
                string boundary = string.Format("----{0}", DateTime.Now.Ticks.ToString("x")),        // 分界线可以自定义参数
                    beginBoundary = string.Format("--{0}\r\n", boundary),
                    endBoundary = string.Format("\r\n--{0}--\r\n", boundary);
                byte[] beginBoundaryBytes = parameter.Encoding.GetBytes(beginBoundary),
                    endBoundaryBytes = parameter.Encoding.GetBytes(endBoundary);
                // 2.组装开始分界线数据体 到内存流中
                memoryStream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length);
                // 3.组装 上传文件附加携带的参数 到内存流中
                if (parameter.PostParameters != null && parameter.PostParameters.Count > 0)
                {
                    foreach (KeyValuePair<string, string> keyValuePair in parameter.PostParameters)
                    {
                        string parameterHeaderTemplate = string.Format("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n{2}", keyValuePair.Key, keyValuePair.Value, beginBoundary);
                        byte[] parameterHeaderBytes = parameter.Encoding.GetBytes(parameterHeaderTemplate);

                        memoryStream.Write(parameterHeaderBytes, 0, parameterHeaderBytes.Length);
                    }
                }

                if (parameter.FileNameValue != null)//如果没有你文件则跳过本检测
                {
                    //4.组装文件头数据体 到内存流中
                    string fileHeaderTemplate = string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: application/octet-stream\r\n\r\n", parameter.FileNameKey, parameter.FileNameValue);
                    byte[] fileHeaderBytes = parameter.Encoding.GetBytes(fileHeaderTemplate);
                    memoryStream.Write(fileHeaderBytes, 0, fileHeaderBytes.Length);
                    // 5.组装文件流 到内存流中
                    byte[] buffer = new byte[1024 * 1024 * 1];
                    int size = parameter.UploadStream.Read(buffer, 0, buffer.Length);
                    while (size > 0)
                    {
                        memoryStream.Write(buffer, 0, size);
                        size = parameter.UploadStream.Read(buffer, 0, buffer.Length);
                    }
                    // 6.组装结束分界线数据体 到内存流中
                    memoryStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);

                }
                //7.获取二进制数据
                byte[] postBytes = memoryStream.ToArray();
                // 8.HttpWebRequest 组装
                HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(new Uri(parameter.Url, UriKind.RelativeOrAbsolute));
                webRequest.Method = "POST";
                webRequest.Timeout = 10000;
                webRequest.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
                webRequest.ContentLength = postBytes.Length;
                if (Regex.IsMatch(parameter.Url, "^https://"))
                {
                    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
                    ServicePointManager.ServerCertificateValidationCallback = CheckValidationResult;
                }
                // 9.写入上传请求数据
                using (Stream requestStream = webRequest.GetRequestStream())
                {
                    requestStream.Write(postBytes, 0, postBytes.Length);
                    requestStream.Close();
                }
                // 10.获取响应
                using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
                {
                    using (StreamReader reader = new StreamReader(webResponse.GetResponseStream(), parameter.Encoding))
                    {
                        string body = reader.ReadToEnd();
                        reader.Close();
                        return body;
                    }
                }
            }
        }

        static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            return true;
        }
    }
}

*、UploadParameterType.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WinFormsApp
{
    /// <summary>
    /// 上传文件 - 请求参数类
    /// </summary>
    public class UploadParameterType
    {
        public UploadParameterType()
        {
            FileNameKey = "fileName";
            Encoding = Encoding.UTF8;
            PostParameters = new Dictionary<string, string>();
        }
        /// <summary>
        /// 上传地址
        /// </summary>
        public string Url { get; set; }
        /// <summary>
        /// 文件名称key
        /// </summary>
        public string FileNameKey { get; set; }
        /// <summary>
        /// 文件名称value
        /// </summary>
        public string FileNameValue { get; set; }
        /// <summary>
        /// 编码格式
        /// </summary>
        public Encoding Encoding { get; set; }
        /// <summary>
        /// 上传文件的流
        /// </summary>
        public Stream UploadStream { get; set; }
        /// <summary>
        /// 上传文件 携带的参数集合
        /// </summary>
        public IDictionary<string, string> PostParameters { get; set; }
    }
}

*
*
*、直接调用

using (FileStream fs = new FileStream(@"C:\\test.zip", FileMode.Open, FileAccess.Read))
{
    Dictionary<string, string> postParameter = new Dictionary<string, string>();
    postParameter.Add("name", "heshang");
    postParameter.Add("param", "1 2 3");
    string result = HttpUploadClient.Execute(new UploadParameterType
    {
        Url = url,
        UploadStream = fs,
        FileNameValue = "test.zip",
        PostParameters = postParameter
    });
}

*、接口

public IHttpActionResult Post()
{
    HttpPostedFile file = HttpContext.Current.Request.Files[0];
    string pyPath = HttpContext.Current.Request["name"];
    string Params = HttpContext.Current.Request["params"];
    file.SaveAs("C:\\test.zip");
    return Ok("");
}

*
*
*
*
*

举报

相关推荐

0 条评论