C implements the HTTP method for uploading files

This article gives an example of how C# implements the HTTP upload method. Share to everybody for everybody reference. Specific implementation methods are as follows:

Send the file code as follows:

/// <summary>

/// Http Upload a file 

/// </summary>

public static string HttpUploadFile(string url, string path)

{

    //  Set the parameters 

    HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

    CookieContainer cookieContainer = new CookieContainer();

    request.CookieContainer = cookieContainer;

    request.AllowAutoRedirect = true;

    request.Method = "POST";

    string boundary = DateTime.Now.Ticks.ToString("X"); //  Random divider 

    request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;

    byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");

    byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
    int pos = path.LastIndexOf("\\");

    string fileName = path.Substring(pos + 1);
    // Request header information  

    StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));

    byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
    FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);

    byte[] bArr = new byte[fs.Length];

    fs.Read(bArr, 0, bArr.Length);

    fs.Close();
    Stream postStream = request.GetRequestStream();

    postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);

    postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

    postStream.Write(bArr, 0, bArr.Length);

    postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);

    postStream.Close();
    // Send the request and get the corresponding response data 

    HttpWebResponse response = request.GetResponse() as HttpWebResponse;

    // until request.GetResponse() The application then starts sending to the target page Post request 

    Stream instream = response.GetResponseStream();

    StreamReader sr = new StreamReader(instream, Encoding.UTF8);

    // Return the results page ( html ) code 

    string content = sr.ReadToEnd();

    return content;

}

The code to receive the file is as follows:

using System;

using System.Web;
namespace SWX

{

    public partial class test2 : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            HttpPostedFile file = Request.Files[0];

            file.SaveAs(MapPath("\\UploadFile\\" + file.FileName));

            Response.Write("Success\r\n");

        }

    }

}

Hopefully this article has helped you with your C# programming.