86 lines
2.8 KiB
C#
86 lines
2.8 KiB
C#
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using System;
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using System.IO;
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using System.Text.RegularExpressions;
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namespace FluentFTP.Proxy {
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/// <summary> A FTP client with a HTTP 1.1 proxy implementation. </summary>
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public class FtpClientHttp11Proxy : FtpClientProxy {
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/// <summary> A FTP client with a HTTP 1.1 proxy implementation </summary>
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/// <param name="proxy">Proxy information</param>
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public FtpClientHttp11Proxy(ProxyInfo proxy)
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: base(proxy) {
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ConnectionType = "HTTP 1.1 Proxy";
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}
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/// <summary> Redefine the first dialog: HTTP Frame for the HTTP 1.1 Proxy </summary>
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protected override void Handshake() {
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var proxyConnectionReply = GetReply();
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if (!proxyConnectionReply.Success)
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throw new FtpException("Can't connect " + Host + " via proxy " + Proxy.Host + ".\nMessage : " +
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proxyConnectionReply.ErrorMessage);
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}
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/// <summary> FTP Create. </summary>
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protected override FtpClient Create() {
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return new FtpClientHttp11Proxy(Proxy);
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}
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/// <summary> FTP Connect. </summary>
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protected override void Connect(FtpSocketStream stream) {
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Connect(stream, Host, Port, FtpIpVersion.ANY);
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}
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/// <summary> FTP Connect. </summary>
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protected override void Connect(FtpSocketStream stream, string host, int port, FtpIpVersion ipVersions)
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{
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base.Connect(stream);
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var writer = new StreamWriter(stream);
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writer.WriteLine("CONNECT {0}:{1} HTTP/1.1", host, port);
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writer.WriteLine("Host: {0}:{1}", host, port);
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if (Proxy.Credentials != null) {
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var credentialsHash = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(string.Format("{0}:{1}", Proxy.Credentials.UserName, Proxy.Credentials.Password)));
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writer.WriteLine("Proxy-Authorization: Basic {0}", credentialsHash);
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}
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writer.WriteLine("User-Agent: custom-ftp-client");
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writer.WriteLine();
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writer.Flush();
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ProxyHandshake(stream);
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}
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private void ProxyHandshake(FtpSocketStream stream) {
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var proxyConnectionReply = GetProxyReply(stream);
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if (!proxyConnectionReply.Success)
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throw new FtpException("Can't connect " + Host + " via proxy " + Proxy.Host + ".\nMessage : " + proxyConnectionReply.ErrorMessage);
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}
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private FtpReply GetProxyReply(FtpSocketStream stream) {
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FtpReply reply = new FtpReply();
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string buf;
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lock (Lock) {
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if (!IsConnected)
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throw new InvalidOperationException("No connection to the server has been established.");
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stream.ReadTimeout = ReadTimeout;
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while ((buf = stream.ReadLine(Encoding)) != null) {
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Match m;
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FtpTrace.WriteLine(buf);
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if ((m = Regex.Match(buf, @"^HTTP/.*\s(?<code>[0-9]{3}) (?<message>.*)$")).Success) {
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reply.Code = m.Groups["code"].Value;
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reply.Message = m.Groups["message"].Value;
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break;
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}
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reply.InfoMessages += string.Format("{0}\n", buf);
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}
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}
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return reply;
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}
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}
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}
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