HTTPサーバーの作り方 (C#)
故あって HTTP サーバーを C# で実装したので、諸所改変して 1 クラスにまとめて、「 HTTP サーバーの作り方ステップ 1, 2, 3 」みたいにして公開してみる。
Visual Studio Community 2019 がインストールされている環境であれば 3 分くらいで HTTP サーバーが動くはず。
ドキュメントルートの中身 (index.html など) はご自分で用意していただく必要あり。
手順は以下のとおり
- Visual Studio Community 2019 をインストールしておく
- Visual Studio Installer のワークロードで以下にチェックを入れておけば良いはず。
- .NET デスクトップ開発
- Visual Studio Installer のワークロードで以下にチェックを入れておけば良いはず。
- Visual Studio 2019 (devenv.exe) を起動してソリューションを作成
- SimpleWebServer クラスの作成
- プロジェクトに SimpleWebServer.cs という空のクラスを追加する。
- 下記コード (_SimpleWebServer_cs_) を今しがた追加した SimpleWebServer.cs にコピペする。
- SimpleWebServer を呼び出すコードを記述
- Program.cs の Main メソッドの中身を以下のとおり記述する。(ドキュメントルート, ポート番号は適宜変更して下さい)
static void Main(string[] args) { SimpleWebServer.Run( @"C:\www\DocRoot", // ドキュメントルート (index.html 等を配置したフォルダ) を指定する。 80 // ポート番号 (特に理由が無ければ 80 を指定する) ); }
- F5で実行すればHTTPサーバーが起動します。
- 試しに http://localhost を開いてみて下さい。指定したドキュメントルートにある index.html (index.htm) が表示されるはずです。
_SimpleWebServer_cs_
using System; using System.Collections.Generic; using System.Diagnostics; using System.IO; using System.Linq; using System.Net; using System.Net.Sockets; using System.Text; using System.Threading; namespace SimpleWebServer // ★名前空間は適宜変えて下さい。 { public class SimpleWebServer { /// <summary> /// ドキュメントルート /// </summary> public string DocRoot = @"C:\www\DocRoot"; /// <summary> /// ポート番号 /// </summary> public int PortNo = 80; /// <summary> /// サーバー処理の合間に呼ばれる処理 /// 戻り値： /// -- サーバーを継続するか /// </summary> public Func<bool> Interlude = () => !Console.KeyAvailable; // 何かキーを押したらサーバー終了 // インスタンスの設定ここまで /// <summary> /// Keep-Alive-タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public static int KeepAliveTimeoutMillis = 5000; /// <summary> /// 要求タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public static int RequestTimeoutMillis = -1; /// <summary> /// 応答タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public static int ResponseTimeoutMillis = -1; /// <summary> /// リクエストの最初の行のみの無通信タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public static int FirstLineTimeoutMillis = 2000; /// <summary> /// リクエストの最初の行以外の(レスポンスも含む)無通信タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public static int IdleTimeoutMillis = 600000; /// <summary> /// スレッド占用タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public static int ThreadTimeoutMillis = 100; /// <summary> /// リクエストのボディの最大サイズ_バイト数 /// -1 == INFINITE /// </summary> public static int BodySizeMax = 300000000; /// <summary> /// 接続待ちキューの長さ /// </summary> public static int Backlog = 300; /// <summary> /// 最大同時接続数 /// </summary> public static int ConnectMax = 100; // 設定ここまで public static void Run(string docRoot, int portNo) { try { if (string.IsNullOrEmpty(docRoot)) throw new Exception("ドキュメントルートを指定して下さい。"); if (!Directory.Exists(docRoot)) throw new Exception("ドキュメントルートは存在しません：" + docRoot); if (portNo < 1 || 65535 < portNo) throw new Exception("不正なポート番号です：" + portNo); new SimpleWebServer() { DocRoot = docRoot, PortNo = portNo, } .Perform(); } catch (Exception e) { WriteLog(e); } } public void Perform() { HTTPServer hs = new HTTPServer(); hs.HTTPConnected = this.P_Connected; hs.Perform(this.PortNo, this.Interlude); } private void P_Connected(HTTPServerChannel channel) { WriteLog("Client: " + channel.Channel.Handler.RemoteEndPoint); if (7 < channel.Method.Length) // ? 最も長いメソッドより長い。 throw new Exception("Received method is too long"); WriteLog("Method: " + channel.Method); switch (channel.Method) { case "GET": this.GetOrHead(channel, false); break; case "HEAD": this.GetOrHead(channel, true); break; case "POST": throw new Exception("Unsupported method"); case "PUT": throw new Exception("Unsupported method"); case "DELETE": throw new Exception("Unsupported method"); case "CONNECT": throw new Exception("Unsupported method"); case "OPTIONS": throw new Exception("Unsupported method"); case "TRACE": throw new Exception("Unsupported method"); case "PATCH": throw new Exception("Unsupported method"); default: throw new Exception("Unknown method"); } } private void GetOrHead(HTTPServerChannel channel, bool head) { string urlPath = channel.PathQuery; // クエリ除去 { int ques = urlPath.IndexOf('?'); if (ques != -1) urlPath = urlPath.Substring(0, ques); } if (1000 < urlPath.Length) // rough limit throw new Exception("Received path is too long"); WriteLog("URL-Path：" + urlPath); string[] pTkns = urlPath.Split('/').Where(v => v != "").Select(v => ToFairLocalPath(v, 0)).ToArray(); string path = Path.Combine(new string[] { this.DocRoot }.Concat(pTkns).ToArray()); WriteLog("RealPath：" + path); if (urlPath.EndsWith("/")) { path = Path.Combine(path, "index.htm"); if (!File.Exists(path)) path += "l"; } else if (Directory.Exists(path)) { channel.ResStatus = 301; channel.ResHeaderPairs.Add(new string[] { "Location", $"http://{channel.GetHeaderValue("Host")}/{string.Join("/", pTkns.Select(v => EncodeUrl(v)))}/" }); channel.ResBody = null; goto response; } if (File.Exists(path)) { channel.ResStatus = 200; channel.ResHeaderPairs.Add(new string[] { "Content-Type", ContentTypeCollection.I.GetContentType(Path.GetExtension(path)) }); channel.ResBody = E_ReadFile(path); } else { channel.ResStatus = 404; //channel.ResHeaderPairs.Add(); channel.ResBody = null; } response: channel.ResHeaderPairs.Add(new string[] { "Server", "sws" }); if (head && channel.ResBody != null) { FileInfo fileInfo = new FileInfo(path); channel.ResHeaderPairs.Add(new string[] { "Content-Length", fileInfo.Length.ToString() }); channel.ResHeaderPairs.Add(new string[] { "X-Last-Modified-Time", fileInfo.LastWriteTime.Ticks.ToString() }); channel.ResBody = null; } WriteLog("Res-Status: " + channel.ResStatus); foreach (string[] pair in channel.ResHeaderPairs) WriteLog($"Res-Header: {pair[0]} = {pair[1]}"); WriteLog("Res-Body: " + (channel.ResBody != null)); } private static string EncodeUrl(string str) { StringBuilder buff = new StringBuilder(); foreach (byte chr in Encoding.UTF8.GetBytes(str)) { buff.Append('%'); buff.Append(chr.ToString("x2")); } return buff.ToString(); } private static IEnumerable<byte[]> E_ReadFile(string file) { long fileSize = new FileInfo(file).Length; for (long offset = 0L; offset < fileSize;) { int readSize = (int)Math.Min(fileSize - offset, (long)(512 * 1024)); byte[] buff = new byte[readSize]; WriteLog($"Read: {offset} {readSize} {fileSize} {(offset * 100.0 / fileSize).ToString("F2")} {((offset + readSize) * 100.0 / fileSize).ToString("F2")}"); using (FileStream reader = new FileStream(file, FileMode.Open, FileAccess.Read)) { reader.Seek(offset, SeekOrigin.Begin); reader.Read(buff, 0, readSize); } yield return buff; offset += (long)readSize; } } private class ContentTypeCollection { private static ContentTypeCollection _i = null; public static ContentTypeCollection I { get { if (_i == null) _i = new ContentTypeCollection(); return _i; } } #region Extension2ContentTypeResource /// <summary> /// https://github.com/stackprobe/HTT/blob/master/doc/MimeType.tsv /// </summary> private static string[] Extension2ContentTypeResource = new string[] { ".323", "text/h323", ".acx", "application/internet-property-stream", ".ai", "application/postscript", ".aif", "audio/x-aiff", ".aifc", "audio/x-aiff", ".aiff", "audio/x-aiff", ".asf", "video/x-ms-asf", ".asr", "video/x-ms-asf", ".asx", "video/x-ms-asf", ".au", "audio/basic", ".avi", "video/x-msvideo", ".axs", "application/olescript", ".bas", "text/plain", ".bcpio", "application/x-bcpio", ".bin", "application/octet-stream", ".bmp", "image/bmp", ".c", "text/plain", ".cat", "application/vnd.ms-pkiseccat", ".cdf", "application/x-cdf", ".cer", "application/x-x509-ca-cert", ".class", "application/octet-stream", ".clp", "application/x-msclip", ".cmx", "image/x-cmx", ".cod", "image/cis-cod", ".cpio", "application/x-cpio", ".crd", "application/x-mscardfile", ".crl", "application/pkix-crl", ".crt", "application/x-x509-ca-cert", ".csh", "application/x-csh", ".css", "text/css", ".dcr", "application/x-director", ".der", "application/x-x509-ca-cert", ".dir", "application/x-director", ".dll", "application/x-msdownload", ".dms", "application/octet-stream", ".doc", "application/msword", ".dot", "application/msword", ".dvi", "application/x-dvi", ".dxr", "application/x-director", ".eps", "application/postscript", ".etx", "text/x-setext", ".evy", "application/envoy", ".exe", "application/octet-stream", ".fif", "application/fractals", ".flr", "x-world/x-vrml", ".gif", "image/gif", ".gtar", "application/x-gtar", ".gz", "application/x-gzip", ".h", "text/plain", ".hdf", "application/x-hdf", ".hlp", "application/winhlp", ".hqx", "application/mac-binhex40", ".hta", "application/hta", ".htc", "text/x-component", ".htm", "text/html", ".html", "text/html", ".htt", "text/webviewhtml", ".ico", "image/x-icon", ".ief", "image/ief", ".iii", "application/x-iphone", ".ins", "application/x-internet-signup", ".isp", "application/x-internet-signup", ".jfif", "image/pipeg", ".jpe", "image/jpeg", ".jpeg", "image/jpeg", ".jpg", "image/jpeg", ".js", "application/x-javascript", ".json", "application/json", ".latex", "application/x-latex", ".lha", "application/octet-stream", ".lsf", "video/x-la-asf", ".lsx", "video/x-la-asf", ".lzh", "application/octet-stream", ".m13", "application/x-msmediaview", ".m14", "application/x-msmediaview", ".m3u", "audio/x-mpegurl", ".m4a", "audio/aac", ".m4v", "video/mp4", ".man", "application/x-troff-man", ".mdb", "application/x-msaccess", ".me", "application/x-troff-me", ".mht", "message/rfc822", ".mhtml", "message/rfc822", ".mid", "audio/midi", ".midi", "audio/midi", ".mny", "application/x-msmoney", ".mov", "video/quicktime", ".movie", "video/x-sgi-movie", ".mp2", "video/mpeg", ".mp3", "audio/mpeg", ".mp4", "video/mp4", ".mpa", "video/mpeg", ".mpe", "video/mpeg", ".mpeg", "video/mpeg", ".mpg", "video/mpeg", ".mpga", "audio/mpeg", ".mpp", "application/vnd.ms-project", ".mpv2", "video/mpeg", ".ms", "application/x-troff-ms", ".mvb", "application/x-msmediaview", ".nws", "message/rfc822", ".oda", "application/oda", ".ogv", "video/ogg", ".p10", "application/pkcs10", ".p12", "application/x-pkcs12", ".p7b", "application/x-pkcs7-certificates", ".p7c", "application/x-pkcs7-mime", ".p7m", "application/x-pkcs7-mime", ".p7r", "application/x-pkcs7-certreqresp", ".p7s", "application/x-pkcs7-signature", ".pbm", "image/x-portable-bitmap", ".pdf", "application/pdf", ".pfx", "application/x-pkcs12", ".pgm", "image/x-portable-graymap", ".pko", "application/ynd.ms-pkipko", ".pma", "application/x-perfmon", ".pmc", "application/x-perfmon", ".pml", "application/x-perfmon", ".pmr", "application/x-perfmon", ".pmw", "application/x-perfmon", ".png", "image/png", ".pnm", "image/x-portable-anymap", ".pot", "application/vnd.ms-powerpoint", ".ppm", "image/x-portable-pixmap", ".pps", "application/vnd.ms-powerpoint", ".ppt", "application/vnd.ms-powerpoint", ".prf", "application/pics-rules", ".ps", "application/postscript", ".pub", "application/x-mspublisher", ".qt", "video/quicktime", ".ra", "audio/x-pn-realaudio", ".ram", "audio/x-pn-realaudio", ".ras", "image/x-cmu-raster", ".rgb", "image/x-rgb", ".rmi", "audio/mid", ".roff", "application/x-troff", ".rtf", "application/rtf", ".rtx", "text/richtext", ".scd", "application/x-msschedule", ".sct", "text/scriptlet", ".setpay", "application/set-payment-initiation", ".setreg", "application/set-registration-initiation", ".sh", "application/x-sh", ".shar", "application/x-shar", ".sit", "application/x-stuffit", ".snd", "audio/basic", ".spc", "application/x-pkcs7-certificates", ".spl", "application/futuresplash", ".src", "application/x-wais-source", ".sst", "application/vnd.ms-pkicertstore", ".stl", "application/vnd.ms-pkistl", ".stm", "text/html", ".sv4cpio", "application/x-sv4cpio", ".sv4crc", "application/x-sv4crc", ".svg", "image/svg+xml", ".swf", "application/x-shockwave-flash", ".t", "application/x-troff", ".tar", "application/x-tar", ".tcl", "application/x-tcl", ".tex", "application/x-tex", ".texi", "application/x-texinfo", ".texinfo", "application/x-texinfo", ".tgz", "application/x-compressed", ".tif", "image/tiff", ".tiff", "image/tiff", ".tr", "application/x-troff", ".trm", "application/x-msterminal", ".tsv", "text/tab-separated-values", ".txt", "text/plain", ".uls", "text/iuls", ".ustar", "application/x-ustar", ".vcf", "text/x-vcard", ".vrml", "x-world/x-vrml", ".wav", "audio/x-wav", ".wcm", "application/vnd.ms-works", ".wdb", "application/vnd.ms-works", ".webm", "video/webm", ".wks", "application/vnd.ms-works", ".wmf", "application/x-msmetafile", ".wps", "application/vnd.ms-works", ".wri", "application/x-mswrite", ".wrl", "x-world/x-vrml", ".wrz", "x-world/x-vrml", ".xaf", "x-world/x-vrml", ".xbm", "image/x-xbitmap", ".xht", "application/xhtml+xml", ".xhtml", "application/xhtml+xml", ".xla", "application/vnd.ms-excel", ".xlc", "application/vnd.ms-excel", ".xlm", "application/vnd.ms-excel", ".xls", "application/vnd.ms-excel", ".xlt", "application/vnd.ms-excel", ".xlw", "application/vnd.ms-excel", ".xml", "text/xml", ".xof", "x-world/x-vrml", ".xpm", "image/x-xpixmap", ".xsl", "text/xml", ".xwd", "image/x-xwindowdump", ".z", "application/x-compress", ".zip", "application/zip", }; #endregion private Dictionary<string, string> Extension2ContentType = CreateDictionaryIgnoreCase<string>(); private ContentTypeCollection() { for (int index = 0; index < Extension2ContentTypeResource.Length; index += 2) this.Extension2ContentType.Add(Extension2ContentTypeResource[index], Extension2ContentTypeResource[index + 1]); } public string GetContentType(string ext) { if (this.Extension2ContentType.ContainsKey(ext)) return this.Extension2ContentType[ext]; return "application/octet-stream"; // デフォルト } } private class HTTPServer : SockServer { /// <summary> /// サーバーロジック /// 引数： /// -- channel: 接続チャネル /// </summary> public Action<HTTPServerChannel> HTTPConnected = channel => { }; protected override IEnumerable<int> E_Connected(SockChannel channel) { DateTime startedTime = DateTime.Now; for (; ; ) { HTTPServerChannel hsChannel = new HTTPServerChannel(); int retval = -1; hsChannel.Channel = channel; foreach (int size in hsChannel.RecvRequest()) { if (size == 0) throw null; // never if (size < 0) { yield return retval; retval = -1; } else retval = 1; } HTTPConnected(hsChannel); if (KeepAliveTimeoutMillis != -1 && KeepAliveTimeoutMillis < (DateTime.Now - startedTime).TotalMilliseconds) { hsChannel.KeepAlive = false; } foreach (int size in hsChannel.SendResponse()) { if (size == 0) throw null; // never if (size < 0) { yield return retval; retval = -1; } else retval = 1; } if (!hsChannel.KeepAlive) break; } } } private class HTTPServerChannel { public SockChannel Channel; public IEnumerable<int> RecvRequest() { this.Channel.SessionTimeoutTime = TimeoutMillisToDateTime(RequestTimeoutMillis); this.Channel.P_IdleTimeoutMillis = FirstLineTimeoutMillis; foreach (var relay in this.RecvLine(ret => this.FirstLine = ret)) yield return relay; { string[] tokens = this.FirstLine.Split(' '); this.Method = tokens[0]; this.PathQuery = DecodeURL(tokens[1]); this.HTTPVersion = tokens[2]; } this.Channel.P_IdleTimeoutMillis = IdleTimeoutMillis; foreach (var relay in this.RecvHeader()) yield return relay; this.CheckHeader(); if (this.Expect100Continue) { foreach (var relay in this.SendLine("HTTP/1.1 100 Continue") .Concat(this.Channel.Send(CRLF))) yield return relay; } foreach (var relay in this.RecvBody()) yield return relay; } private static DateTime? TimeoutMillisToDateTime(int millis) { if (millis == -1) return null; return DateTime.Now + TimeSpan.FromMilliseconds((double)millis); } private static string DecodeURL(string path) { byte[] src = Encoding.ASCII.GetBytes(path); using (MemoryStream dest = new MemoryStream()) { for (int index = 0; index < src.Length; index++) { if (src[index] == 0x25) // ? '%' { dest.WriteByte((byte)Convert.ToInt32(Encoding.ASCII.GetString(new byte[] { src[index + 1], src[index + 2] }), 16)); index += 2; } else if (src[index] == 0x2b) // ? '+' { dest.WriteByte(0x20); // ' ' } else { dest.WriteByte(src[index]); } } byte[] bytes = dest.ToArray(); if (!P_UTF8Check.Check(bytes)) throw new Exception("URL is not Japanese UTF-8"); return Encoding.UTF8.GetString(bytes); } } public string FirstLine; public string Method; public string PathQuery; public string HTTPVersion; public List<string[]> HeaderPairs = new List<string[]>(); public byte[] Body; private const byte CR = 0x0d; private const byte LF = 0x0a; private readonly byte[] CRLF = new byte[] { CR, LF }; private IEnumerable<int> RecvLine(Action<string> a_return) { const int LINE_LEN_MAX = 128 * 1024; List<byte> buff = new List<byte>(LINE_LEN_MAX); for (; ; ) { byte[] chrs = null; foreach (var relay in this.Channel.Recv(1, ret => chrs = ret)) yield return relay; byte chr = chrs[0]; if (chr == CR) continue; if (chr == LF) break; if (LINE_LEN_MAX < buff.Count) throw new OverflowException("Received line is too long"); if (chr < 0x20 || 0x7e < chr) // ? not ASCII -> SPACE chr = 0x20; buff.Add(chr); } a_return(Encoding.ASCII.GetString(buff.ToArray())); } private IEnumerable<int> RecvHeader() { const int HEADERS_LEN_MAX = 128 * 1024 + 65536; const int WEIGHT = 256; int roughHeaderLength = 0; for (; ; ) { string line = null; foreach (var relay in this.RecvLine(ret => line = ret)) yield return relay; if (line == null) throw null; // never if (line == "") break; roughHeaderLength += line.Length + WEIGHT; if (HEADERS_LEN_MAX < roughHeaderLength) throw new OverflowException("Received header is too long"); if (line[0] <= ' ') // HACK: 行折り畳み(line folding)対応 -- 行折り畳みは廃止されたっぽいけど念のため対応しておく。 { this.HeaderPairs[this.HeaderPairs.Count - 1][1] += " " + line.Trim(); } else { int colon = line.IndexOf(':'); if (colon == -1) throw new Exception("Bad header line (no colon)"); this.HeaderPairs.Add(new string[] { line.Substring(0, colon).Trim(), line.Substring(colon + 1).Trim(), }); } } } public string GetHeaderValue(string name) { string[] pair = this.HeaderPairs.FirstOrDefault(v => EqualsIgnoreCase(v[0], name)); if (pair == null) throw new Exception("No header key: " + name); return pair[1]; } public int ContentLength = 0; public bool Chunked = false; public string ContentType = null; public bool Expect100Continue = false; public bool KeepAlive = false; private void CheckHeader() { foreach (string[] pair in this.HeaderPairs) { string key = pair[0]; string value = pair[1]; if (1000 < key.Length || 1000 < value.Length) // rough limit { WriteLog("Ignore gen-header key and value (too long)"); continue; } if (EqualsIgnoreCase(key, "Content-Length")) { if (value.Length < 1 || 10 < value.Length) throw new Exception("Bad Content-Length value"); this.ContentLength = int.Parse(value); } else if (EqualsIgnoreCase(key, "Transfer-Encoding")) { this.Chunked = ContainsIgnoreCase(value, "chunked"); } else if (EqualsIgnoreCase(key, "Content-Type")) { this.ContentType = value; } else if (EqualsIgnoreCase(key, "Expect")) { this.Expect100Continue = ContainsIgnoreCase(value, "100-continue"); } else if (EqualsIgnoreCase(key, "Connection")) { this.KeepAlive = ContainsIgnoreCase(value, "keep-alive"); } } } private IEnumerable<int> RecvBody() { const int READ_SIZE_MAX = 1024 * 1024; HTTPBodyOutputStream buff = this.Channel.BodyOutputStream; if (this.Chunked) { for (; ; ) { string line = null; foreach (var relay in this.RecvLine(ret => line = ret)) yield return relay; if (line == null) throw null; // never // chunk-extension の削除 { int i = line.IndexOf(';'); if (i != -1) line = line.Substring(0, i); } line = line.Trim(); if (line.Length < 1 || 8 < line.Length) throw new Exception("Bad chunk-size line"); int size = Convert.ToInt32(line, 16); if (size == 0) break; if (size < 0) throw new Exception("Bad chunk-size: " + size); if (BodySizeMax != -1 && BodySizeMax - buff.Count < size) throw new Exception($"Chunk is too big: {buff.Count} + {size}"); int chunkEnd = buff.Count + size; while (buff.Count < chunkEnd) { byte[] data = null; foreach (var relay in this.Channel.Recv(Math.Min(READ_SIZE_MAX, chunkEnd - buff.Count), ret => data = ret)) yield return relay; if (data == null) throw null; // never buff.Write(data); } foreach (var relay in this.Channel.Recv(2, ret => { })) // CR-LF yield return relay; } for (; ; ) // RFC 7230 4.1.2 Chunked Trailer Part { string line = null; foreach (var relay in this.RecvLine(ret => line = ret)) yield return relay; if (line == null) throw null; // never if (line == "") break; } } else { if (this.ContentLength < 0) throw new Exception("Bad Content-Length: " + this.ContentLength); if (BodySizeMax != -1 && BodySizeMax < this.ContentLength) throw new Exception("Body is too big: " + this.ContentLength); while (buff.Count < this.ContentLength) { byte[] data = null; foreach (var relay in this.Channel.Recv(Math.Min(READ_SIZE_MAX, this.ContentLength - buff.Count), ret => data = ret)) yield return relay; if (data == null) throw null; // never buff.Write(data); } } this.Body = buff.ToByteArray(); } public int ResStatus = 200; public List<string[]> ResHeaderPairs = new List<string[]>(); public IEnumerable<byte[]> ResBody = null; public IEnumerable<int> SendResponse() { this.Body = null; this.Channel.SessionTimeoutTime = TimeoutMillisToDateTime(ResponseTimeoutMillis); foreach (var relay in this.SendLine("HTTP/1.1 " + this.ResStatus + " Hello Happy World")) yield return relay; foreach (string[] pair in this.ResHeaderPairs) foreach (var relay in this.SendLine(pair[0] + ": " + pair[1])) yield return relay; if (this.ResBody == null) { foreach (var relay in this.EndHeader()) yield return relay; } else { IEnumerator<byte[]> resBodyIterator = this.ResBody.GetEnumerator(); if (resBodyIterator.MoveNext()) { byte[] first = resBodyIterator.Current; if (resBodyIterator.MoveNext()) { foreach (var relay in this.SendLine("Transfer-Encoding: chunked") .Concat(this.EndHeader()) .Concat(this.SendChunk(first))) yield return relay; do { foreach (var relay in this.SendChunk(resBodyIterator.Current)) yield return relay; } while (resBodyIterator.MoveNext()); foreach (var relay in this.SendLine("0") .Concat(this.Channel.Send(CRLF))) yield return relay; } else { foreach (var relay in this.SendLine("Content-Length: " + first.Length) .Concat(this.EndHeader()) .Concat(this.Channel.Send(first))) yield return relay; } } else { foreach (var relay in this.SendLine("Content-Length: 0") .Concat(this.EndHeader())) yield return relay; } } } private IEnumerable<int> EndHeader() { foreach (var relay in this.SendLine("Connection: " + (this.KeepAlive ? "keep-alive" : "close")) .Concat(this.Channel.Send(CRLF))) yield return relay; } private IEnumerable<int> SendChunk(byte[] chunk) { if (1 <= chunk.Length) { foreach (var relay in this.SendLine(chunk.Length.ToString("x")) .Concat(this.Channel.Send(chunk)) .Concat(this.Channel.Send(CRLF))) yield return relay; } } private IEnumerable<int> SendLine(string line) { foreach (var relay in this.Channel.Send(Encoding.ASCII.GetBytes(line)) .Concat(this.Channel.Send(CRLF))) yield return relay; } } private class HTTPBodyOutputStream : IDisposable { #if true public void Write(byte[] data) { throw new Exception("Request-Body is not supported"); } public int Count { get { return 0; } } public byte[] ToByteArray() { return new byte[0]; } public void Dispose() { // noop } #else private static string TMP_Dir = null; private string BuffFile; private int Size = 0; public HTTPBodyOutputStream() { if (TMP_Dir == null) { string dir = Environment.GetEnvironmentVariable("TMP"); if (string.IsNullOrEmpty(dir)) throw new Exception("TMP is empty"); if (!Directory.Exists(dir)) throw new Exception("TMP does not exist"); TMP_Dir = dir; } this.BuffFile = Path.Combine(TMP_Dir, $"SimpleWebServer_{Guid.NewGuid().ToString()}.tmp"); File.WriteAllBytes(this.BuffFile, new byte[0]); } public void Write(byte[] data) { using (FileStream writer = new FileStream(this.BuffFile, FileMode.Append, FileAccess.Write)) { writer.Write(data, 0, data.Length); } this.Size += data.Length; } public int Count { get { return this.Size; } } public byte[] ToByteArray() { byte[] data = File.ReadAllBytes(this.BuffFile); File.WriteAllBytes(this.BuffFile, new byte[0]); this.Size = 0; return data; } public void Dispose() { if (this.BuffFile != null) { try { File.Delete(this.BuffFile); } catch { } this.BuffFile = null; } } #endif } private abstract class SockServer { /// <summary> /// サーバーロジック /// 通信量： /// -- 0 == 通信終了 -- Supplier の最後の要素の次以降 0 (default(int)) になるため /// -- 0 未満 == 通信無し /// -- 1 以上 == 通信有り /// </summary> /// <param name="channel">接続チャネル</param> /// <returns>通信量</returns> protected abstract IEnumerable<int> E_Connected(SockChannel channel); private List<SockChannel> Channels = new List<SockChannel>(); public void Perform(int portNo, Func<bool> interlude) { WriteLog("SERVER STARTING..."); try { using (Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)) { IPEndPoint endPoint = new IPEndPoint(0L, portNo); try { listener.Bind(endPoint); } catch (Exception e) { throw new Exception("バインドに失敗しました。指定されたポート番号は使用中です。", e); } listener.Listen(Backlog); listener.Blocking = false; WriteLog("SERVER STARTED!"); int waitMillis = 0; while (interlude()) { if (waitMillis < 100) waitMillis++; for (int c = 0; c < 30; c++) // HACK: 繰り返し回数_適当 { Socket handler = this.Channels.Count < ConnectMax ? this.Connect(listener) : null; if (handler == null) // ? 接続無し || 最大同時接続数に達している。 break; waitMillis = 0; // reset TimeWaitMonitor.Connected(); { SockChannel channel = new SockChannel(); channel.Handler = handler; handler = null; // もう使わない。 channel.Handler.Blocking = false; channel.ID = IDIssuer.Issue(); channel.Connected = Supplier(this.E_Connected(channel)); channel.BodyOutputStream = new HTTPBodyOutputStream(); this.Channels.Add(channel); WriteLog("CONN-ST " + channel.ID); } } for (int index = this.Channels.Count - 1; 0 <= index; index--) { SockChannel channel = this.Channels[index]; int size; try { size = channel.Connected(); if (0 < size) // ? 通信有り { waitMillis = 0; // reset } } catch (Exception e) { WriteLog(e); size = 0; } if (size == 0) // ? 切断 { WriteLog("CONN-ED " + channel.ID); this.Disconnect(channel); this.Channels[index] = this.Channels[this.Channels.Count - 1]; this.Channels.RemoveAt(this.Channels.Count - 1); TimeWaitMonitor.Disconnect(); } } if (0 < waitMillis) Thread.Sleep(waitMillis); } WriteLog("SERVER ENDING..."); this.Stop(); } } catch (Exception e) { WriteLog(e); } WriteLog("SERVER ENDED!"); } private Socket Connect(Socket listener) // ret: null == 接続タイムアウト { try { return listener.Accept(); } catch (SocketException e) { if (e.ErrorCode != 10035) { throw new Exception("Connection error", e); } return null; } } private void Stop() { foreach (SockChannel channel in this.Channels) this.Disconnect(channel); this.Channels.Clear(); } private void Disconnect(SockChannel channel) { try { channel.Handler.Shutdown(SocketShutdown.Both); } catch (Exception e) { WriteLog(e); } try { channel.Handler.Close(); } catch (Exception e) { WriteLog(e); } channel.BodyOutputStream.Dispose(); IDIssuer.Discard(channel.ID); } } private class SockChannel { public Socket Handler; public int ID; public Func<int> Connected; public HTTPBodyOutputStream BodyOutputStream; /// <summary> /// セッションタイムアウト日時 /// null == INFINITE /// </summary> public DateTime? SessionTimeoutTime = null; /// <summary> /// スレッド占用タイムアウト日時 /// null == リセット状態 /// </summary> public DateTime? ThreadTimeoutTime = null; /// <summary> /// 無通信タイムアウト_ミリ秒 /// -1 == INFINITE /// </summary> public int P_IdleTimeoutMillis = -1; private IEnumerable<int> PreRecvSend() { if (this.SessionTimeoutTime != null && this.SessionTimeoutTime.Value < DateTime.Now) { throw new Exception("Session time-out"); } if (this.ThreadTimeoutTime == null) { if (ThreadTimeoutMillis != -1) this.ThreadTimeoutTime = DateTime.Now + TimeSpan.FromMilliseconds((double)ThreadTimeoutMillis); } else if (this.ThreadTimeoutTime.Value < DateTime.Now) { WriteLog("Thread time-out"); this.ThreadTimeoutTime = null; yield return -1; } } public IEnumerable<int> Recv(int size, Action<byte[]> a_return) { byte[] data = new byte[size]; int offset = 0; while (1 <= size) { int? recvSize = null; foreach (var relay in this.TryRecv(data, offset, size, ret => recvSize = ret)) yield return relay; size -= recvSize.Value; offset += recvSize.Value; } a_return(data); } public IEnumerable<int> TryRecv(byte[] data, int offset, int size, Action<int> a_return) { DateTime startedTime = DateTime.Now; for (; ; ) { foreach (var relay in this.PreRecvSend()) yield return relay; try { int recvSize = this.Handler.Receive(data, offset, size, SocketFlags.None); if (recvSize <= 0) { throw new Exception("Receive error (disconnect)"); } if (10.0 <= (DateTime.Now - startedTime).TotalSeconds) // 長い無通信時間をモニタする。 { WriteLog("IDLE-RECV " + (DateTime.Now - startedTime).TotalSeconds.ToString("F3")); } a_return(recvSize); break; } catch (SocketException e) { if (e.ErrorCode != 10035) { throw new Exception("Receive error", e); } } if (this.P_IdleTimeoutMillis != -1 && this.P_IdleTimeoutMillis < (DateTime.Now - startedTime).TotalMilliseconds) { throw new Exception("Receive error (idle time-out)"); } this.ThreadTimeoutTime = null; yield return -1; } yield return 1; } public IEnumerable<int> Send(byte[] data) { int offset = 0; int size = data.Length; while (1 <= size) { int? sentSize = null; foreach (var relay in this.TrySend(data, offset, Math.Min(4 * 1024 * 1024, size), ret => sentSize = ret)) yield return relay; size -= sentSize.Value; offset += sentSize.Value; } } private IEnumerable<int> TrySend(byte[] data, int offset, int size, Action<int> a_return) { DateTime startedTime = DateTime.Now; for (; ; ) { foreach (var relay in this.PreRecvSend()) yield return relay; try { int sentSize = this.Handler.Send(data, offset, size, SocketFlags.None); if (sentSize <= 0) { throw new Exception("Send error (disconnect)"); } if (10.0 <= (DateTime.Now - startedTime).TotalSeconds) // 長い無通信時間をモニタする。 { WriteLog("IDLE-SEND " + (DateTime.Now - startedTime).TotalSeconds.ToString("F3")); } a_return(sentSize); break; } catch (SocketException e) { if (e.ErrorCode != 10035) { throw new Exception("Send error", e); } } if (this.P_IdleTimeoutMillis != -1 && this.P_IdleTimeoutMillis < (DateTime.Now - startedTime).TotalMilliseconds) { throw new Exception("Send error (idle time-out)"); } this.ThreadTimeoutTime = null; yield return -1; } yield return 1; } } private static UTF8Check P_UTF8Check = new UTF8Check(); private class UTF8Check { private object[] Home = CreateByteCodeBranchTable(); public UTF8Check() { for (byte chr = 0x20; chr <= 0x7e; chr++) // ASCII this.Add(new byte[] { chr }); for (byte chr = 0xa1; chr <= 0xdf; chr++) // 半角カナ this.Add(Encoding.UTF8.GetBytes(new string(new char[] { SJISHanKanaToUnicode(chr) }))); foreach (char chr in GetUnicodeListOfSJISMBC()) // 2バイト文字 this.Add(Encoding.UTF8.GetBytes(new string(new char[] { chr }))); } private void Add(byte[] bytes) { if (bytes.Length < 1) throw null; // never object[] curr = this.Home; foreach (byte bChr in bytes.Take(bytes.Length - 1)) { int index = (int)bChr; if (curr[index] == null) curr[index] = CreateByteCodeBranchTable(); curr = (object[])curr[index]; if (curr == this.Home) throw null; // never } { int index = (int)bytes[bytes.Length - 1]; if (curr[index] != null) if (curr[index] != this.Home) // 同じ文字が追加されることがある。 throw null; // never curr[index] = this.Home; } } private static object[] CreateByteCodeBranchTable() { return new object[256]; } public bool Check(byte[] bytes) { object[] curr = this.Home; foreach (byte bChr in bytes) { curr = (object[])curr[(int)bChr]; if (curr == null) return false; } return curr == this.Home; } } private static class IDIssuer { private static Queue<int> Stocks = new Queue<int>(Enumerable.Range(1, 9)); private static int Counter = 10; public static int Issue() { if (Stocks.Count == 0) Stocks.Enqueue(Counter++); return Stocks.Dequeue(); } public static void Discard(int id) { Stocks.Enqueue(id); } } private static class TimeWaitMonitor { // 参考値： // 動的ポートの数 16384 (49152 ～ 65535), TIME_WAIT-タイムアウト 4 min (240 sec) の場合 (Windowsの既定値) // CTR_ROT_SEC = 60 // COUNTER_NUM = 5 -- 直近 4 ～ 5 分間の切断回数を保持 // COUNT_LIMIT = 10000 -- 50 ミリ秒間隔で接続＆切断し続けた場合 4 分間に 4800 回 --> TIME_WAIT 数 14800 (COUNT_LIMIT + 4800) を超えない。 // - - - // 動的ポートの数 64511 (1025 ～ 65535), TIME_WAIT-タイムアウト 1 min (60 sec) の場合 (動的ポート最大) // CTR_ROT_SEC = 30 // COUNTER_NUM = 3 -- 直近 1 ～ 1.5 分間の切断回数を保持 // COUNT_LIMIT = 60000 -- 50 ミリ秒間隔で接続＆切断し続けた場合 1 分間に 1200 回 --> TIME_WAIT 数 61200 (COUNT_LIMIT + 1200) を超えない。 private const int CTR_ROT_SEC = 60; private const int COUNTER_NUM = 5; private const int COUNT_LIMIT = 10000; private static int ConnectedCount = 0; private static int[] TWCounters = new int[COUNTER_NUM]; // 直近数分間に発生した切断(TIME_WAIT)の回数 private static int TWCounterIndex = 0; private static DateTime NextRotateTime = GetNextRotateTime(); public static void Connected() { KickCounter(1, 0); if (COUNT_LIMIT < ConnectedCount + TWCounters.Sum()) // ? TIME_WAIT 多すぎ -> 時間当たりの接続数を制限する。-- TIME_WAIT を減らす。 { WriteLog("PORT-EXHAUSTION"); Thread.Sleep(50); // HACK: 送受信も止める。 } } public static void Disconnect() { KickCounter(-1, 1); } private static void KickCounter(int connAdd, int twAdd) { ConnectedCount += connAdd; if (NextRotateTime < DateTime.Now) { TWCounterIndex++; TWCounterIndex %= TWCounters.Length; TWCounters[TWCounterIndex] = twAdd; NextRotateTime = GetNextRotateTime(); } else TWCounters[TWCounterIndex] += twAdd; WriteLog($"TIME-WAIT-MONITOR: {twAdd}, {ConnectedCount} + {TWCounters.Sum()} = {ConnectedCount + TWCounters.Sum()}"); } private static DateTime GetNextRotateTime() { return DateTime.Now + TimeSpan.FromSeconds((double)CTR_ROT_SEC); } } #region ToFairLocalPath /// <summary> /// Windowsのローカル名に使用できない予約名のリストを返す。 /// 今では使用可能なものも含む。 /// 元にしたコード： /// https://github.com/stackprobe/Factory/blob/master/Common/DataConv.c#L460-L491 /// </summary> /// <returns>予約名リスト</returns> private static IEnumerable<string> GetReservedWordsForWindowsPath() { yield return "AUX"; yield return "CON"; yield return "NUL"; yield return "PRN"; for (int no = 1; no <= 9; no++) { yield return "COM" + no; yield return "LPT" + no; } // グレーゾーン { yield return "COM0"; yield return "LPT0"; yield return "CLOCK$"; yield return "CONFIG$"; } } /// <summary> /// 歴としたローカル名に変換する。 /// 実際に使用可能なローカル名より基準が厳しい。 /// 元にしたコード： /// https://github.com/stackprobe/Factory/blob/master/Common/DataConv.c#L503-L552 /// </summary> /// <param name="str">対象文字列(対象パス)</param> /// <param name="dirSize">対象パスが存在するディレクトリのフルパスの長さ、考慮しない場合は 0 を指定すること。</param> /// <returns>ローカル名</returns> private static string ToFairLocalPath(string str, int dirSize) { const int MY_PATH_MAX = 250; const string NG_CHARS = "\"*/:<>?\\|"; const string ALT_WORD = "_"; int localPathSizeMax = Math.Max(0, MY_PATH_MAX - dirSize); if (localPathSizeMax < str.Length) // HACK: 元にしたコードではバイト列の長さで判定している。 str = str.Substring(0, localPathSizeMax); //str = ToJString(str); string[] words = str.Split('.'); for (int index = 0; index < words.Length; index++) { string word = words[index]; word = word.Trim(); if ( index == 0 && GetReservedWordsForWindowsPath().Any(resWord => EqualsIgnoreCase(resWord, word)) || word.Any(chr => NG_CHARS.IndexOf(chr) != -1) ) word = ALT_WORD; words[index] = word; } str = string.Join(".", words); if (str == "") str = ALT_WORD; if (str.EndsWith(".")) str = str.Substring(0, str.Length - 1) + ALT_WORD; return str; } #endregion private static void WriteLog(object message) { if (message is Exception) message = ((Exception)message).Message; Console.WriteLine("[" + DateTime.Now + "] " + message); } private static Dictionary<string, V> CreateDictionaryIgnoreCase<V>() { return new Dictionary<string, V>(new IECompStringIgnoreCase()); } private static Func<T> Supplier<T>(IEnumerable<T> src) { IEnumerator<T> reader = src.GetEnumerator(); return () => { if (reader != null) { if (reader.MoveNext()) return reader.Current; reader.Dispose(); reader = null; } return default(T); }; } private class IECompStringIgnoreCase : IEqualityComparer<string> { public bool Equals(string a, string b) { return a.ToLower() == b.ToLower(); } public int GetHashCode(string a) { return a.ToLower().GetHashCode(); } } private static bool EqualsIgnoreCase(string a, string b) { return a.ToLower() == b.ToLower(); } private static bool ContainsIgnoreCase(string str, string ptn) { return str.ToLower().Contains(ptn.ToLower()); } private static char SJISHanKanaToUnicode(byte chr) { return (char)((int)chr + 65216); } #if true private static IEnumerable<char> GetUnicodeListOfSJISMBC() { #region RANGES_RESOURCE string RANGES_RESOURCE = @" 00a700a800b000b100b400b400b600b600d700d700f700f7039103a103a303a903b103c103c303c9040104010410044f04510451201020102015201520182019 201c201d20202021202520262030203020322033203b203b210321032116211621212121212b212b21602169217021792190219321d221d221d421d422002200 2202220322072208220b220b22112211221a221a221d2220222522252227222c222e222e22342235223d223d225222522260226122662267226a226b22822283 2286228722a522a522bf22bf231223122460247325002503250c250c250f25102513251425172518251b251d252025202523252525282528252b252c252f2530 2533253425372538253b253c253f253f25422542254b254b25a025a125b225b325bc25bd25c625c725cb25cb25ce25cf25ef25ef260526062640264026422642 266a266a266d266d266f266f3000300330053015301d301d301f301f30413093309b309e30a130f630fb30fe323132323239323932a432a833033303330d330d 33143314331833183322332333263327332b332b33363336333b333b3349334a334d334d3351335133573357337b337e338e338f339c339e33a133a133c433c4 33cd33cd4e004e014e034e034e074e0b4e0d4e0e4e104e114e144e194e1e4e1e4e214e214e264e264e284e284e2a4e2a4e2d4e2d4e314e324e364e364e384e39 4e3b4e3c4e3f4e3f4e424e434e454e454e4b4e4b4e4d4e4f4e554e594e5d4e5f4e624e624e714e714e734e734e7e4e7e4e804e804e824e824e854e864e884e8c 4e8e4e8e4e914e924e944e954e984e994e9b4e9c4e9e4ea24ea44ea64ea84ea84eab4eae4eb04eb04eb34eb34eb64eb64eba4eba4ec04ec24ec44ec44ec64ec7 4eca4ecb4ecd4ecf4ed44ed94edd4edf4ee14ee14ee34ee54eed4eee4ef04ef04ef24ef24ef64ef74efb4efc4f004f014f034f034f094f0a4f0d4f114f1a4f1a 4f1c4f1d4f2f4f304f344f344f364f364f384f3a4f3c4f3d4f434f434f464f474f4d4f514f534f534f554f574f594f5e4f694f694f6f4f704f734f734f754f76 4f7b4f7c4f7f4f7f4f834f834f864f864f884f884f8a4f8b4f8d4f8d4f8f4f8f4f914f924f944f944f964f964f984f984f9a4f9b4f9d4f9d4fa04fa14fab4fab 4fad4faf4fb54fb64fbf4fbf4fc24fc44fc94fca4fcd4fce4fd04fd14fd44fd44fd74fd84fda4fdb4fdd4fdd4fdf4fdf4fe14fe14fe34fe54fee4fef4ff34ff3 4ff54ff64ff84ff84ffa4ffa4ffe4fff5005500650095009500b500b500d500d500f500f5011501250145014501650165019501a501e501f502150265028502d 5036503650395039504050405042504350465049504f505050555056505a505a505c505c50655065506c506c50705070507250725074507650785078507d507d 5080508050855085508d508d50915091509450945098509a50ac50ad50b250b550b750b750be50be50c250c250c550c550c950ca50cd50cd50cf50cf50d150d1 50d550d650d850d850da50da50de50de50e350e350e550e550e750e750ed50ee50f450f550f950f950fb50fb5100510251045104510951095112511251145116 51185118511a511a511f511f51215121512a512a5132513251375137513a513c513f51415143514e515051505152515251545154515a515a515c515c51625162 516451655168516e5171517151755178517c517c5180518051825182518551865189518a518c518d518f51935195519751995199519d519d51a051a051a251a2 51a451a651a851ac51b051b751bd51be51c451c651c951c951cb51cd51d651d651db51dd51e051e151e651e751e951ea51ec51ed51f051f151f551f651f851fa 51fd51fe520052005203520452065208520a520b520e520e521152115214521552175217521d521d52245225522752275229522a522e522e5230523052335233 5236523b5243524452475247524a524d524f524f5254525452565256525b525b525e525e526352655269526a526f5275527d527d527f527f5283528352875289 528d528d5291529252945294529b529c529f52a052a352a352a652a652a952ad52af52af52b152b152b452b552b952b952bc52bc52be52be52c052c152c352c3 52c552c552c752c752c952c952cd52cd52d252d252d552d552d752d952db52db52dd52e052e252e452e652e752f252f352f552f552f852fa52fe530253055308 530d530d530f5310531553175319531a531d531d5320532153235324532a532a532f532f53315331533353335338533b533f5341534353435345534a534d534d 5351535453575358535a535a535c535c535e535e536053605366536653695369536e537553775378537b537b537f537f53825382538453845393539353965396 53985398539a539a539f53a053a553a653a853a953ad53ae53b053b053b253b353b653b653bb53bb53c253c353c853ce53d453d453d653d753d953d953db53db 53dd53dd53df53df53e153e553e853f353f653f853fa53fa540154015403540454085411541b541b541d541d541f54205426542654295429542b542e54365436 54385439543b543e5440544054425442544654465448544a544e544e54515451545f545f54685468546a546a547054715473547354755477547b547d54805480 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9dc69dc69dcf9dcf9dd39dd39dd99dd99de69de69ded9ded9def9def9df29df29df89dfa9dfd9dfd9e199e1b9e1e9e1e9e759e759e789e799e7d9e7d9e7f9e7f 9e819e819e889e889e8b9e8c9e919e939e959e959e979e979e9d9e9d9e9f9e9f9ea59ea69ea99eaa9ead9ead9eb89ebc9ebe9ebf9ec49ec49ecc9ed29ed49ed4 9ed89ed99edb9ede9ee09ee09ee59ee59ee89ee89eef9eef9ef49ef49ef69ef79ef99ef99efb9efd9f079f089f0e9f0e9f139f139f159f159f209f219f2c9f2c 9f3b9f3b9f3e9f3e9f4a9f4b9f4e9f4f9f529f529f549f549f5f9f639f669f679f6a9f6a9f6c9f6c9f729f729f769f779f8d9f8d9f959f959f9c9f9d9fa09fa0 f929f929f9dcf9dcfa0efa2dff01ff5effe0ffe5 "; #endregion RANGES_RESOURCE = new string(RANGES_RESOURCE.Where(chr => ' ' <= chr).ToArray()); for (int index = 0; index < RANGES_RESOURCE.Length; index += 8) { char chrMin = (char)Convert.ToInt32(RANGES_RESOURCE.Substring(index + 0, 4), 16); char chrMax = (char)Convert.ToInt32(RANGES_RESOURCE.Substring(index + 4, 4), 16); for (char chr = chrMin; chr <= chrMax; chr++) { yield return chr; } } } #else private static IEnumerable<char> GetUnicodeListOfSJISMBC() { return P_GetUnicodeListOfSJISMBC().OrderBy(v => v).Distinct(); } private static IEnumerable<char> P_GetUnicodeListOfSJISMBC() { #region RANGES_RESOURCE string RANGES_RESOURCE = @" 8140817e818081ac81b881bf81c881ce81da81e881f081f781fc81fc824f8258 826082798281829a829f82f18340837e83808396839f83b683bf83d684408460 8470847e84808491849f84be8740875d875f8775877e877e8780879c889f88fc 8940897e898089fc8a408a7e8a808afc8b408b7e8b808bfc8c408c7e8c808cfc 8d408d7e8d808dfc8e408e7e8e808efc8f408f7e8f808ffc9040907e908090fc 9140917e918091fc9240927e928092fc9340937e938093fc9440947e948094fc 9540957e958095fc9640967e968096fc9740977e978097fc98409872989f98fc 9940997e998099fc9a409a7e9a809afc9b409b7e9b809bfc9c409c7e9c809cfc 9d409d7e9d809dfc9e409e7e9e809efc9f409f7e9f809ffce040e07ee080e0fc e140e17ee180e1fce240e27ee280e2fce340e37ee380e3fce440e47ee480e4fc e540e57ee580e5fce640e67ee680e6fce740e77ee780e7fce840e87ee880e8fc e940e97ee980e9fcea40ea7eea80eaa4ed40ed7eed80edfcee40ee7eee80eeec eeefeefcfa40fa7efa80fafcfb40fb7efb80fbfcfc40fc4b "; #endregion RANGES_RESOURCE = new string(RANGES_RESOURCE.Where(chr => ' ' <= chr).ToArray()); //Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); // for .NET Core Encoding SJIS = Encoding.GetEncoding(932); for (int index = 0; index < RANGES_RESOURCE.Length; index += 8) { int chrMin = Convert.ToInt32(RANGES_RESOURCE.Substring(index + 0, 4), 16); int chrMax = Convert.ToInt32(RANGES_RESOURCE.Substring(index + 4, 4), 16); for (int chr = chrMin; chr <= chrMax; chr++) { yield return SJIS.GetString(new byte[] { (byte)(chr >> 8), (byte)(chr & 0xff) })[0]; } } } #endif } }
補足
クライアントが送信したURLは任意のバイト列であると想定すべき (あらゆるバイト列を想定すべき) であり、これをそのまま string.UTF8.GetString したり File.Exists, Directory.Exists したりするのは何かを踏み抜く気がするため US-ASCII + Shift_JIS(CP-932) に存在する文字以外は例外を投げるようにしている。これが必要な処置なのかどうかは分からない。要らないということであれば if (!P_UTF8Check.Check(bytes)) throw new Exception("URL is not Japanese UTF-8"); を削除できるので、関連するメソッドも削除すればコード量は相当減るだろう。
同様に ToFairLocalPath も不要であれば削除されたし。NUL, PRN などのトラブルの元になるファイル名を弾くための大昔に作ったメソッドで、今だに使い続けている。今では問題無いファイル名も弾いているかもしれない。ていうか弾いてる。
SimpleWebServer in GitHub コピペするにはこっちの方が楽かも
Hatena/SimpleWebServer.cs at main · soleil-taruto/Hatena · GitHub
(2022.9.13) バグを見つけたのでこっそり修正こっそり更新。
(2022.11.23) こっそり修正こっそり更新。
(2023.4.3) こっそり修正こっそり更新。
