| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System; |
| | | 5 | | using System.Buffers; |
| | | 6 | | using System.Globalization; |
| | | 7 | | using System.IO; |
| | | 8 | | using System.IO.Pipelines; |
| | | 9 | | using System.Text; |
| | | 10 | | using System.Threading.Tasks; |
| | | 11 | | using CoreWCF.Runtime; |
| | | 12 | | using Microsoft.Extensions.Logging; |
| | | 13 | | |
| | | 14 | | namespace CoreWCF.Channels.Framing |
| | | 15 | | { |
| | | 16 | | internal static class DecoderHelper |
| | | 17 | | { |
| | | 18 | | public static void ValidateSize(long size) |
| | | 19 | | { |
| | | 20 | | if (size <= 0) |
| | | 21 | | { |
| | | 22 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException(nameof(size), |
| | | 23 | | } |
| | | 24 | | } |
| | | 25 | | } |
| | | 26 | | |
| | | 27 | | internal struct IntDecoder |
| | | 28 | | { |
| | | 29 | | public IntDecoder(ILogger logger) |
| | | 30 | | { |
| | | 31 | | Logger = logger; |
| | | 32 | | IsValueDecoded = false; |
| | | 33 | | _value = 0; |
| | | 34 | | _index = 0; |
| | | 35 | | } |
| | | 36 | | |
| | | 37 | | private int _value; |
| | | 38 | | private short _index; |
| | | 39 | | private const int LastIndex = 4; |
| | | 40 | | |
| | | 41 | | public int Value |
| | | 42 | | { |
| | | 43 | | get |
| | | 44 | | { |
| | | 45 | | if (!IsValueDecoded) |
| | | 46 | | { |
| | | 47 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 48 | | } |
| | | 49 | | |
| | | 50 | | return _value; |
| | | 51 | | } |
| | | 52 | | } |
| | | 53 | | |
| | | 54 | | public bool IsValueDecoded { get; private set; } |
| | | 55 | | |
| | | 56 | | private ILogger Logger { get; } |
| | | 57 | | |
| | | 58 | | public void Reset() |
| | | 59 | | { |
| | | 60 | | _index = 0; |
| | | 61 | | _value = 0; |
| | | 62 | | IsValueDecoded = false; |
| | | 63 | | } |
| | | 64 | | |
| | | 65 | | public int Decode(ReadOnlySequence<byte> buffer) |
| | | 66 | | { |
| | | 67 | | DecoderHelper.ValidateSize(buffer.Length); |
| | | 68 | | if (IsValueDecoded) |
| | | 69 | | { |
| | | 70 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingValueN |
| | | 71 | | } |
| | | 72 | | int bytesConsumed = 0; |
| | | 73 | | |
| | | 74 | | while (bytesConsumed < buffer.Length) |
| | | 75 | | { |
| | | 76 | | ReadOnlySpan<byte> data = buffer.First.Span; |
| | | 77 | | int next = data[0]; |
| | | 78 | | _value |= (next & 0x7F) << (_index * 7); |
| | | 79 | | bytesConsumed++; |
| | | 80 | | if (_index == LastIndex && (next & 0xF8) != 0) |
| | | 81 | | { |
| | | 82 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.FramingSizeToo |
| | | 83 | | } |
| | | 84 | | Logger.DecodingInt(next, _index,_value); |
| | | 85 | | _index++; |
| | | 86 | | if ((next & 0x80) == 0) |
| | | 87 | | { |
| | | 88 | | IsValueDecoded = true; |
| | | 89 | | break; |
| | | 90 | | } |
| | | 91 | | buffer = buffer.Slice(buffer.GetPosition(1)); |
| | | 92 | | } |
| | | 93 | | return bytesConsumed; |
| | | 94 | | } |
| | | 95 | | } |
| | | 96 | | |
| | | 97 | | internal abstract class StringDecoder |
| | | 98 | | { |
| | | 99 | | private int _encodedSize; |
| | | 100 | | private byte[] _encodedBytes; |
| | | 101 | | private int _bytesNeeded; |
| | | 102 | | private string _value; |
| | | 103 | | private State _currentState; |
| | | 104 | | private IntDecoder _sizeDecoder; |
| | | 105 | | private readonly int _sizeQuota; |
| | | 106 | | private int _valueLengthInBytes; |
| | | 107 | | |
| | | 108 | | public StringDecoder(int sizeQuota, ILogger logger) |
| | | 109 | | { |
| | | 110 | | Logger = logger; |
| | | 111 | | _sizeQuota = sizeQuota; |
| | | 112 | | _sizeDecoder = new IntDecoder(logger); |
| | | 113 | | Reset(); |
| | | 114 | | } |
| | | 115 | | |
| | | 116 | | protected ILogger Logger { get; } |
| | | 117 | | |
| | | 118 | | public bool IsValueDecoded |
| | | 119 | | { |
| | | 120 | | get { return CurrentState == State.Done; } |
| | | 121 | | } |
| | | 122 | | |
| | | 123 | | public string Value |
| | | 124 | | { |
| | | 125 | | get |
| | | 126 | | { |
| | | 127 | | if (CurrentState != State.Done) |
| | | 128 | | { |
| | | 129 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 130 | | } |
| | | 131 | | |
| | | 132 | | return _value; |
| | | 133 | | } |
| | | 134 | | } |
| | | 135 | | |
| | | 136 | | public State CurrentState { get => _currentState; private set => _currentState = value; } |
| | | 137 | | |
| | | 138 | | public int Decode(ReadOnlySequence<byte> buffer) |
| | | 139 | | { |
| | | 140 | | DecoderHelper.ValidateSize(buffer.Length); |
| | | 141 | | |
| | | 142 | | int bytesConsumed; |
| | | 143 | | Logger.LogStartState(this); |
| | | 144 | | switch (CurrentState) |
| | | 145 | | { |
| | | 146 | | case State.ReadingSize: |
| | | 147 | | bytesConsumed = _sizeDecoder.Decode(buffer); |
| | | 148 | | if (_sizeDecoder.IsValueDecoded) |
| | | 149 | | { |
| | | 150 | | _encodedSize = _sizeDecoder.Value; |
| | | 151 | | if (_encodedSize > _sizeQuota) |
| | | 152 | | { |
| | | 153 | | Exception quotaExceeded = OnSizeQuotaExceeded(_encodedSize); |
| | | 154 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(quotaExceeded); |
| | | 155 | | } |
| | | 156 | | if (_encodedBytes == null || _encodedBytes.Length < _encodedSize) |
| | | 157 | | { |
| | | 158 | | _encodedBytes = Fx.AllocateByteArray(_encodedSize); |
| | | 159 | | _value = null; |
| | | 160 | | } |
| | | 161 | | CurrentState = State.ReadingBytes; |
| | | 162 | | _bytesNeeded = _encodedSize; |
| | | 163 | | } |
| | | 164 | | break; |
| | | 165 | | case State.ReadingBytes: |
| | | 166 | | if (_value != null && _valueLengthInBytes == _encodedSize && _bytesNeeded == _encodedSize && |
| | | 167 | | buffer.Length >= _encodedSize && CompareBuffers(_encodedBytes, buffer)) |
| | | 168 | | { |
| | | 169 | | bytesConsumed = _bytesNeeded; |
| | | 170 | | OnComplete(_value); |
| | | 171 | | } |
| | | 172 | | else |
| | | 173 | | { |
| | | 174 | | bytesConsumed = _bytesNeeded; |
| | | 175 | | if (buffer.Length < _bytesNeeded) |
| | | 176 | | { |
| | | 177 | | bytesConsumed = (int)buffer.Length; |
| | | 178 | | } |
| | | 179 | | |
| | | 180 | | Span<byte> span = _encodedBytes; |
| | | 181 | | Span<byte> slicedBytes = span.Slice(_encodedSize - _bytesNeeded, bytesConsumed); |
| | | 182 | | ReadOnlySequence<byte> tempBuffer = buffer.Slice(0, bytesConsumed); |
| | | 183 | | tempBuffer.CopyTo(slicedBytes); |
| | | 184 | | _bytesNeeded -= bytesConsumed; |
| | | 185 | | if (_bytesNeeded == 0) |
| | | 186 | | { |
| | | 187 | | _value = Encoding.UTF8.GetString(_encodedBytes, 0, _encodedSize); |
| | | 188 | | _valueLengthInBytes = _encodedSize; |
| | | 189 | | Logger.StringDecoded(_value); |
| | | 190 | | OnComplete(_value); |
| | | 191 | | } |
| | | 192 | | } |
| | | 193 | | break; |
| | | 194 | | default: |
| | | 195 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.InvalidDecoder |
| | | 196 | | } |
| | | 197 | | |
| | | 198 | | Logger.LogEndState(this, bytesConsumed); |
| | | 199 | | return bytesConsumed; |
| | | 200 | | } |
| | | 201 | | |
| | | 202 | | protected virtual void OnComplete(string value) |
| | | 203 | | { |
| | | 204 | | CurrentState = State.Done; |
| | | 205 | | } |
| | | 206 | | |
| | | 207 | | private static bool CompareBuffers(byte[] buffer1, ReadOnlySequence<byte> buffer2) |
| | | 208 | | { |
| | | 209 | | byte[] buff = buffer2.ToArray(); |
| | | 210 | | for (int i = 0; i < buffer1.Length; i++) |
| | | 211 | | { |
| | | 212 | | if (buffer1[i] != buff[i]) |
| | | 213 | | { |
| | | 214 | | return false; |
| | | 215 | | } |
| | | 216 | | } |
| | | 217 | | return true; |
| | | 218 | | } |
| | | 219 | | |
| | | 220 | | protected abstract Exception OnSizeQuotaExceeded(int size); |
| | | 221 | | |
| | | 222 | | public void Reset() |
| | | 223 | | { |
| | | 224 | | CurrentState = State.ReadingSize; |
| | | 225 | | _sizeDecoder.Reset(); |
| | | 226 | | } |
| | | 227 | | |
| | | 228 | | public enum State |
| | | 229 | | { |
| | | 230 | | ReadingSize, |
| | | 231 | | ReadingBytes, |
| | | 232 | | Done, |
| | | 233 | | } |
| | | 234 | | } |
| | | 235 | | |
| | | 236 | | internal class ViaStringDecoder : StringDecoder |
| | | 237 | | { |
| | | 238 | | private Uri _via; |
| | | 239 | | |
| | | 240 | | public ViaStringDecoder(int sizeQuota, ILogger logger) |
| | | 241 | | : base(sizeQuota, logger) |
| | | 242 | | { |
| | | 243 | | } |
| | | 244 | | |
| | | 245 | | protected override Exception OnSizeQuotaExceeded(int size) |
| | | 246 | | { |
| | | 247 | | Exception result = new InvalidDataException(SR.Format(SR.FramingViaTooLong, size)); |
| | | 248 | | FramingEncodingString.AddFaultString(result, FramingEncodingString.ViaTooLongFault); |
| | | 249 | | return result; |
| | | 250 | | } |
| | | 251 | | |
| | | 252 | | protected override void OnComplete(string value) |
| | | 253 | | { |
| | | 254 | | try |
| | | 255 | | { |
| | | 256 | | _via = new Uri(value); |
| | | 257 | | base.OnComplete(value); |
| | | 258 | | } |
| | | 259 | | catch (UriFormatException exception) |
| | | 260 | | { |
| | | 261 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.Format(SR.FramingV |
| | | 262 | | } |
| | | 263 | | } |
| | | 264 | | |
| | | 265 | | public Uri ValueAsUri |
| | | 266 | | { |
| | | 267 | | get |
| | | 268 | | { |
| | | 269 | | if (!IsValueDecoded) |
| | | 270 | | { |
| | | 271 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 272 | | } |
| | | 273 | | |
| | | 274 | | return _via; |
| | | 275 | | } |
| | | 276 | | } |
| | | 277 | | } |
| | | 278 | | |
| | | 279 | | internal class FaultStringDecoder : StringDecoder |
| | | 280 | | { |
| | | 281 | | internal const int FaultSizeQuota = 256; |
| | | 282 | | |
| | | 283 | | public FaultStringDecoder(ILogger logger) |
| | | 284 | | : base(FaultSizeQuota, logger) |
| | | 285 | | { |
| | | 286 | | } |
| | | 287 | | |
| | | 288 | | protected override Exception OnSizeQuotaExceeded(int size) |
| | | 289 | | { |
| | | 290 | | return new InvalidDataException(SR.Format(SR.FramingFaultTooLong, size)); |
| | | 291 | | } |
| | | 292 | | } |
| | | 293 | | |
| | | 294 | | internal class ContentTypeStringDecoder : StringDecoder |
| | | 295 | | { |
| | | 296 | | public ContentTypeStringDecoder(int sizeQuota, ILogger logger) |
| | | 297 | | : base(sizeQuota, logger) |
| | | 298 | | { |
| | | 299 | | } |
| | | 300 | | |
| | | 301 | | protected override Exception OnSizeQuotaExceeded(int size) |
| | | 302 | | { |
| | | 303 | | Exception result = new InvalidDataException(SR.Format(SR.FramingContentTypeTooLong, size)); |
| | | 304 | | FramingEncodingString.AddFaultString(result, FramingEncodingString.ContentTypeTooLongFault); |
| | | 305 | | return result; |
| | | 306 | | } |
| | | 307 | | |
| | | 308 | | public static string GetString(FramingEncodingType type) |
| | | 309 | | { |
| | | 310 | | switch (type) |
| | | 311 | | { |
| | | 312 | | case FramingEncodingType.Soap11Utf8: |
| | | 313 | | return FramingEncodingString.Soap11Utf8; |
| | | 314 | | case FramingEncodingType.Soap11Utf16: |
| | | 315 | | return FramingEncodingString.Soap11Utf16; |
| | | 316 | | case FramingEncodingType.Soap11Utf16FFFE: |
| | | 317 | | return FramingEncodingString.Soap11Utf16FFFE; |
| | | 318 | | case FramingEncodingType.Soap12Utf8: |
| | | 319 | | return FramingEncodingString.Soap12Utf8; |
| | | 320 | | case FramingEncodingType.Soap12Utf16: |
| | | 321 | | return FramingEncodingString.Soap12Utf16; |
| | | 322 | | case FramingEncodingType.Soap12Utf16FFFE: |
| | | 323 | | return FramingEncodingString.Soap12Utf16FFFE; |
| | | 324 | | case FramingEncodingType.MTOM: |
| | | 325 | | return FramingEncodingString.MTOM; |
| | | 326 | | case FramingEncodingType.Binary: |
| | | 327 | | return FramingEncodingString.Binary; |
| | | 328 | | case FramingEncodingType.BinarySession: |
| | | 329 | | return FramingEncodingString.BinarySession; |
| | | 330 | | case FramingEncodingType.ExtendedBinaryGZip: |
| | | 331 | | return FramingEncodingString.ExtendedBinaryGZip; |
| | | 332 | | case FramingEncodingType.ExtendedBinarySessionGZip: |
| | | 333 | | return FramingEncodingString.ExtendedBinarySessionGZip; |
| | | 334 | | case FramingEncodingType.ExtendedBinaryDeflate: |
| | | 335 | | return FramingEncodingString.ExtendedBinaryDeflate; |
| | | 336 | | case FramingEncodingType.ExtendedBinarySessionDeflate: |
| | | 337 | | return FramingEncodingString.ExtendedBinarySessionDeflate; |
| | | 338 | | default: |
| | | 339 | | return "unknown" + ((int)type).ToString(CultureInfo.InvariantCulture); |
| | | 340 | | } |
| | | 341 | | } |
| | | 342 | | } |
| | | 343 | | |
| | | 344 | | internal abstract class FramingDecoder |
| | | 345 | | { |
| | | 346 | | protected FramingDecoder(ILogger logger) => Logger = logger; |
| | | 347 | | |
| | | 348 | | protected abstract string CurrentStateAsString { get; } |
| | | 349 | | |
| | | 350 | | public virtual string ContentType { get { throw new NotImplementedException(); } } |
| | | 351 | | |
| | | 352 | | protected ILogger Logger { get; } |
| | | 353 | | |
| | | 354 | | public virtual Uri Via { get { throw new NotImplementedException(); } } |
| | | 355 | | |
| | | 356 | | public abstract int Decode(ReadOnlySequence<byte> buffer); |
| | | 357 | | |
| | | 358 | | protected void ValidateFramingMode(FramingMode mode) |
| | | 359 | | { |
| | | 360 | | switch (mode) |
| | | 361 | | { |
| | | 362 | | case FramingMode.Singleton: |
| | | 363 | | case FramingMode.Duplex: |
| | | 364 | | case FramingMode.Simplex: |
| | | 365 | | case FramingMode.SingletonSized: |
| | | 366 | | break; |
| | | 367 | | default: |
| | | 368 | | { |
| | | 369 | | Exception exception = CreateException(new InvalidDataException(SR.Format( |
| | | 370 | | SR.FramingModeNotSupported, mode.ToString())), FramingEncodingString.UnsupportedModeFault); |
| | | 371 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(exception); |
| | | 372 | | } |
| | | 373 | | } |
| | | 374 | | } |
| | | 375 | | |
| | | 376 | | protected void ValidateRecordType(FramingRecordType expectedType, FramingRecordType foundType) |
| | | 377 | | { |
| | | 378 | | if (foundType != expectedType) |
| | | 379 | | { |
| | | 380 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidRecordTypeException(expectedType, |
| | | 381 | | } |
| | | 382 | | } |
| | | 383 | | |
| | | 384 | | // special validation for Preamble Ack for usability purposes (MB#39593) |
| | | 385 | | protected void ValidatePreambleAck(FramingRecordType foundType) |
| | | 386 | | { |
| | | 387 | | if (foundType != FramingRecordType.PreambleAck) |
| | | 388 | | { |
| | | 389 | | Exception inner = CreateInvalidRecordTypeException(FramingRecordType.PreambleAck, foundType); |
| | | 390 | | string exceptionString; |
| | | 391 | | if (((byte)foundType == 'h') || ((byte)foundType == 'H')) |
| | | 392 | | { |
| | | 393 | | exceptionString = SR.PreambleAckIncorrectMaybeHttp; |
| | | 394 | | } |
| | | 395 | | else |
| | | 396 | | { |
| | | 397 | | exceptionString = SR.PreambleAckIncorrect; |
| | | 398 | | } |
| | | 399 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ProtocolException(exceptionString, inner)) |
| | | 400 | | } |
| | | 401 | | } |
| | | 402 | | |
| | | 403 | | private Exception CreateInvalidRecordTypeException(FramingRecordType expectedType, FramingRecordType foundType) |
| | | 404 | | { |
| | | 405 | | return new InvalidDataException(SR.Format(SR.FramingRecordTypeMismatch, expectedType.ToString(), foundType.T |
| | | 406 | | } |
| | | 407 | | |
| | | 408 | | protected void ValidateMajorVersion(int majorVersion) |
| | | 409 | | { |
| | | 410 | | if (majorVersion != FramingVersion.Major) |
| | | 411 | | { |
| | | 412 | | Exception exception = CreateException(new InvalidDataException(SR.Format( |
| | | 413 | | SR.FramingVersionNotSupported, majorVersion)), FramingEncodingString.UnsupportedVersionFault); |
| | | 414 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(exception); |
| | | 415 | | } |
| | | 416 | | } |
| | | 417 | | |
| | | 418 | | public Exception CreatePrematureEOFException() |
| | | 419 | | { |
| | | 420 | | return CreateException(new InvalidDataException(SR.FramingPrematureEOF)); |
| | | 421 | | } |
| | | 422 | | |
| | | 423 | | protected Exception CreateException(InvalidDataException innerException, string framingFault) |
| | | 424 | | { |
| | | 425 | | Exception result = CreateException(innerException); |
| | | 426 | | FramingEncodingString.AddFaultString(result, framingFault); |
| | | 427 | | return result; |
| | | 428 | | } |
| | | 429 | | |
| | | 430 | | protected Exception CreateException(InvalidDataException innerException) |
| | | 431 | | { |
| | | 432 | | // TODO: Can the position still be recovered? |
| | | 433 | | return new ProtocolException(SR.Format(SR.FramingError, /*StreamPosition*/ -1, CurrentStateAsString), |
| | | 434 | | innerException); |
| | | 435 | | } |
| | | 436 | | } |
| | | 437 | | |
| | | 438 | | // Pattern: |
| | | 439 | | // Done |
| | | 440 | | internal class ServerModeDecoder : FramingDecoder |
| | | 441 | | { |
| | | 442 | | private int _majorVersion; |
| | | 443 | | private int _minorVersion; |
| | | 444 | | private FramingMode _mode; |
| | | 445 | | |
| | 118 | 446 | | public ServerModeDecoder(ILogger logger) : base(logger) |
| | | 447 | | { |
| | 118 | 448 | | Reset(); |
| | 118 | 449 | | } |
| | | 450 | | |
| | | 451 | | public override int Decode(ReadOnlySequence<byte> buffer) |
| | | 452 | | { |
| | 575 | 453 | | DecoderHelper.ValidateSize(buffer.Length); |
| | 575 | 454 | | ReadOnlySpan<byte> data = buffer.First.Span; |
| | | 455 | | |
| | | 456 | | try |
| | | 457 | | { |
| | | 458 | | int bytesConsumed; |
| | 575 | 459 | | Logger.LogStartState(this); |
| | 575 | 460 | | switch (CurrentState) |
| | | 461 | | { |
| | | 462 | | case State.ReadingVersionRecord: |
| | 115 | 463 | | ValidateRecordType(FramingRecordType.Version, (FramingRecordType)data[0]); |
| | 115 | 464 | | CurrentState = State.ReadingMajorVersion; |
| | 115 | 465 | | bytesConsumed = 1; |
| | 115 | 466 | | break; |
| | | 467 | | case State.ReadingMajorVersion: |
| | 115 | 468 | | _majorVersion = data[0]; |
| | 115 | 469 | | ValidateMajorVersion(_majorVersion); |
| | 115 | 470 | | CurrentState = State.ReadingMinorVersion; |
| | 115 | 471 | | bytesConsumed = 1; |
| | 115 | 472 | | break; |
| | | 473 | | case State.ReadingMinorVersion: |
| | 115 | 474 | | _minorVersion = data[0]; |
| | 115 | 475 | | CurrentState = State.ReadingModeRecord; |
| | 115 | 476 | | bytesConsumed = 1; |
| | 115 | 477 | | break; |
| | | 478 | | case State.ReadingModeRecord: |
| | 115 | 479 | | ValidateRecordType(FramingRecordType.Mode, (FramingRecordType)data[0]); |
| | 115 | 480 | | CurrentState = State.ReadingModeValue; |
| | 115 | 481 | | bytesConsumed = 1; |
| | 115 | 482 | | break; |
| | | 483 | | case State.ReadingModeValue: |
| | 115 | 484 | | _mode = (FramingMode)data[0]; |
| | 115 | 485 | | ValidateFramingMode(_mode); |
| | 115 | 486 | | CurrentState = State.Done; |
| | 115 | 487 | | bytesConsumed = 1; |
| | 115 | 488 | | break; |
| | | 489 | | default: |
| | 0 | 490 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | 0 | 491 | | CreateException(new InvalidDataException(SR.InvalidDecoderStateMachine))); |
| | | 492 | | } |
| | | 493 | | |
| | 575 | 494 | | Logger.LogEndState(this, bytesConsumed); |
| | 575 | 495 | | return bytesConsumed; |
| | | 496 | | } |
| | 0 | 497 | | catch (InvalidDataException e) |
| | | 498 | | { |
| | 0 | 499 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e)); |
| | | 500 | | } |
| | 575 | 501 | | } |
| | | 502 | | |
| | | 503 | | public void Reset() |
| | | 504 | | { |
| | 118 | 505 | | CurrentState = State.ReadingVersionRecord; |
| | 118 | 506 | | } |
| | | 507 | | |
| | | 508 | | internal async Task<bool> ReadModeAsync(PipeReader inputPipe, System.Threading.CancellationToken cancelToken) |
| | | 509 | | { |
| | | 510 | | ReadOnlySequence<byte> buffer; |
| | 0 | 511 | | while (true) |
| | | 512 | | { |
| | 118 | 513 | | ReadResult readResult = await inputPipe.ReadAsync(cancelToken); |
| | 117 | 514 | | if (readResult.IsCompleted) |
| | | 515 | | { |
| | 2 | 516 | | return false; |
| | | 517 | | } |
| | | 518 | | |
| | 115 | 519 | | buffer = readResult.Buffer; |
| | | 520 | | |
| | 575 | 521 | | while (buffer.Length > 0) |
| | | 522 | | { |
| | | 523 | | int bytesDecoded; |
| | | 524 | | try |
| | | 525 | | { |
| | 575 | 526 | | bytesDecoded = Decode(buffer); |
| | 575 | 527 | | } |
| | 0 | 528 | | catch (CommunicationException e) |
| | | 529 | | { |
| | | 530 | | // Need to call inputPipe.AdvanceTo so that the code that handles the exception |
| | | 531 | | // can send the fault and drain the input pipe by calling ReadAsync again. |
| | 0 | 532 | | inputPipe.AdvanceTo(buffer.Start); |
| | 0 | 533 | | throw; |
| | | 534 | | } |
| | | 535 | | |
| | 575 | 536 | | if (bytesDecoded > 0) |
| | | 537 | | { |
| | 575 | 538 | | buffer = buffer.Slice(bytesDecoded); |
| | | 539 | | } |
| | | 540 | | |
| | 575 | 541 | | if (CurrentState == State.Done) |
| | | 542 | | { |
| | 115 | 543 | | inputPipe.AdvanceTo(buffer.Start); |
| | 115 | 544 | | return true; |
| | | 545 | | } |
| | | 546 | | } |
| | | 547 | | |
| | 0 | 548 | | inputPipe.AdvanceTo(buffer.End); |
| | | 549 | | } |
| | 117 | 550 | | } |
| | | 551 | | |
| | 3108 | 552 | | public State CurrentState { get; private set; } |
| | | 553 | | |
| | 0 | 554 | | protected override string CurrentStateAsString => CurrentState.ToString(); |
| | | 555 | | |
| | | 556 | | public FramingMode Mode |
| | | 557 | | { |
| | | 558 | | get |
| | | 559 | | { |
| | 115 | 560 | | if (CurrentState != State.Done) |
| | | 561 | | { |
| | 0 | 562 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 563 | | } |
| | | 564 | | |
| | 115 | 565 | | return _mode; |
| | | 566 | | } |
| | | 567 | | } |
| | | 568 | | |
| | | 569 | | public int MajorVersion |
| | | 570 | | { |
| | | 571 | | get |
| | | 572 | | { |
| | 0 | 573 | | if (CurrentState != State.Done) |
| | | 574 | | { |
| | 0 | 575 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 576 | | } |
| | | 577 | | |
| | 0 | 578 | | return _majorVersion; |
| | | 579 | | } |
| | | 580 | | } |
| | | 581 | | |
| | | 582 | | public int MinorVersion |
| | | 583 | | { |
| | | 584 | | get |
| | | 585 | | { |
| | 0 | 586 | | if (CurrentState != State.Done) |
| | | 587 | | { |
| | 0 | 588 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 589 | | } |
| | | 590 | | |
| | 0 | 591 | | return _minorVersion; |
| | | 592 | | } |
| | | 593 | | } |
| | | 594 | | |
| | | 595 | | public enum State |
| | | 596 | | { |
| | | 597 | | ReadingVersionRecord, |
| | | 598 | | ReadingMajorVersion, |
| | | 599 | | ReadingMinorVersion, |
| | | 600 | | ReadingModeRecord, |
| | | 601 | | ReadingModeValue, |
| | | 602 | | Done, |
| | | 603 | | } |
| | | 604 | | } |
| | | 605 | | |
| | | 606 | | // Used for Duplex/Simplex |
| | | 607 | | // Pattern: |
| | | 608 | | // Start, |
| | | 609 | | // (UpgradeRequest, upgrade-content-type)*, |
| | | 610 | | // (EnvelopeStart, ReadingEnvelopeBytes*, EnvelopeEnd)*, |
| | | 611 | | // End |
| | | 612 | | internal class ServerSessionDecoder : FramingDecoder |
| | | 613 | | { |
| | | 614 | | private readonly ViaStringDecoder _viaDecoder; |
| | | 615 | | private readonly StringDecoder _contentTypeDecoder; |
| | | 616 | | private IntDecoder _sizeDecoder; |
| | | 617 | | private string _contentType; |
| | | 618 | | private int _envelopeBytesNeeded; |
| | | 619 | | private int _envelopeSize; |
| | | 620 | | private string _upgrade; |
| | | 621 | | |
| | | 622 | | public ServerSessionDecoder(int maxViaLength, int maxContentTypeLength, ILogger logger) : base(logger) |
| | | 623 | | { |
| | | 624 | | _viaDecoder = new ViaStringDecoder(maxViaLength, logger); |
| | | 625 | | _contentTypeDecoder = new ContentTypeStringDecoder(maxContentTypeLength, logger); |
| | | 626 | | _sizeDecoder = new IntDecoder(logger); |
| | | 627 | | Reset(); |
| | | 628 | | } |
| | | 629 | | |
| | | 630 | | public State CurrentState { get; private set; } |
| | | 631 | | |
| | | 632 | | protected override string CurrentStateAsString => CurrentState.ToString(); |
| | | 633 | | |
| | | 634 | | public override string ContentType |
| | | 635 | | { |
| | | 636 | | get |
| | | 637 | | { |
| | | 638 | | if (CurrentState < State.PreUpgradeStart) |
| | | 639 | | { |
| | | 640 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 641 | | } |
| | | 642 | | |
| | | 643 | | return _contentType; |
| | | 644 | | } |
| | | 645 | | } |
| | | 646 | | |
| | | 647 | | public override Uri Via |
| | | 648 | | { |
| | | 649 | | get |
| | | 650 | | { |
| | | 651 | | if (CurrentState < State.ReadingContentTypeRecord) |
| | | 652 | | { |
| | | 653 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 654 | | } |
| | | 655 | | |
| | | 656 | | return _viaDecoder.ValueAsUri; |
| | | 657 | | } |
| | | 658 | | } |
| | | 659 | | |
| | | 660 | | public void Reset() |
| | | 661 | | { |
| | | 662 | | CurrentState = State.ReadingViaRecord; |
| | | 663 | | } |
| | | 664 | | |
| | | 665 | | public string Upgrade |
| | | 666 | | { |
| | | 667 | | get |
| | | 668 | | { |
| | | 669 | | if (CurrentState != State.UpgradeRequest) |
| | | 670 | | { |
| | | 671 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 672 | | } |
| | | 673 | | |
| | | 674 | | return _upgrade; |
| | | 675 | | } |
| | | 676 | | } |
| | | 677 | | |
| | | 678 | | public int EnvelopeSize |
| | | 679 | | { |
| | | 680 | | get |
| | | 681 | | { |
| | | 682 | | if (CurrentState < State.EnvelopeStart) |
| | | 683 | | { |
| | | 684 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 685 | | } |
| | | 686 | | |
| | | 687 | | return _envelopeSize; |
| | | 688 | | } |
| | | 689 | | } |
| | | 690 | | |
| | | 691 | | public override int Decode(ReadOnlySequence<byte> buffer) |
| | | 692 | | { |
| | | 693 | | DecoderHelper.ValidateSize(buffer.Length); |
| | | 694 | | ReadOnlySpan<byte> data = buffer.First.Span; |
| | | 695 | | try |
| | | 696 | | { |
| | | 697 | | int bytesConsumed; |
| | | 698 | | FramingRecordType recordType; |
| | | 699 | | Logger.LogStartState(this); |
| | | 700 | | switch (CurrentState) |
| | | 701 | | { |
| | | 702 | | case State.ReadingViaRecord: |
| | | 703 | | recordType = (FramingRecordType)data[0]; |
| | | 704 | | ValidateRecordType(FramingRecordType.Via, recordType); |
| | | 705 | | bytesConsumed = 1; |
| | | 706 | | _viaDecoder.Reset(); |
| | | 707 | | CurrentState = State.ReadingViaString; |
| | | 708 | | break; |
| | | 709 | | case State.ReadingViaString: |
| | | 710 | | bytesConsumed = _viaDecoder.Decode(buffer); |
| | | 711 | | if (_viaDecoder.IsValueDecoded) |
| | | 712 | | { |
| | | 713 | | CurrentState = State.ReadingContentTypeRecord; |
| | | 714 | | } |
| | | 715 | | break; |
| | | 716 | | case State.ReadingContentTypeRecord: |
| | | 717 | | recordType = (FramingRecordType)data[0]; |
| | | 718 | | if (recordType == FramingRecordType.KnownEncoding) |
| | | 719 | | { |
| | | 720 | | bytesConsumed = 1; |
| | | 721 | | CurrentState = State.ReadingContentTypeByte; |
| | | 722 | | } |
| | | 723 | | else |
| | | 724 | | { |
| | | 725 | | ValidateRecordType(FramingRecordType.ExtensibleEncoding, recordType); |
| | | 726 | | bytesConsumed = 1; |
| | | 727 | | _contentTypeDecoder.Reset(); |
| | | 728 | | CurrentState = State.ReadingContentTypeString; |
| | | 729 | | } |
| | | 730 | | break; |
| | | 731 | | case State.ReadingContentTypeByte: |
| | | 732 | | _contentType = ContentTypeStringDecoder.GetString((FramingEncodingType)data[0]); |
| | | 733 | | bytesConsumed = 1; |
| | | 734 | | CurrentState = State.PreUpgradeStart; |
| | | 735 | | break; |
| | | 736 | | case State.ReadingContentTypeString: |
| | | 737 | | bytesConsumed = _contentTypeDecoder.Decode(buffer); |
| | | 738 | | if (_contentTypeDecoder.IsValueDecoded) |
| | | 739 | | { |
| | | 740 | | CurrentState = State.PreUpgradeStart; |
| | | 741 | | _contentType = _contentTypeDecoder.Value; |
| | | 742 | | } |
| | | 743 | | break; |
| | | 744 | | case State.PreUpgradeStart: |
| | | 745 | | bytesConsumed = 0; |
| | | 746 | | CurrentState = State.ReadingUpgradeRecord; |
| | | 747 | | break; |
| | | 748 | | case State.ReadingUpgradeRecord: |
| | | 749 | | recordType = (FramingRecordType)data[0]; |
| | | 750 | | if (recordType == FramingRecordType.UpgradeRequest) |
| | | 751 | | { |
| | | 752 | | bytesConsumed = 1; |
| | | 753 | | _contentTypeDecoder.Reset(); |
| | | 754 | | CurrentState = State.ReadingUpgradeString; |
| | | 755 | | } |
| | | 756 | | else |
| | | 757 | | { |
| | | 758 | | bytesConsumed = 0; |
| | | 759 | | CurrentState = State.ReadingPreambleEndRecord; |
| | | 760 | | } |
| | | 761 | | break; |
| | | 762 | | case State.ReadingUpgradeString: |
| | | 763 | | bytesConsumed = _contentTypeDecoder.Decode(buffer); |
| | | 764 | | if (_contentTypeDecoder.IsValueDecoded) |
| | | 765 | | { |
| | | 766 | | CurrentState = State.UpgradeRequest; |
| | | 767 | | _upgrade = _contentTypeDecoder.Value; |
| | | 768 | | } |
| | | 769 | | break; |
| | | 770 | | case State.UpgradeRequest: |
| | | 771 | | bytesConsumed = 0; |
| | | 772 | | CurrentState = State.ReadingUpgradeRecord; |
| | | 773 | | break; |
| | | 774 | | case State.ReadingPreambleEndRecord: |
| | | 775 | | recordType = (FramingRecordType)data[0]; |
| | | 776 | | ValidateRecordType(FramingRecordType.PreambleEnd, recordType); |
| | | 777 | | bytesConsumed = 1; |
| | | 778 | | CurrentState = State.Start; |
| | | 779 | | break; |
| | | 780 | | case State.Start: |
| | | 781 | | bytesConsumed = 0; |
| | | 782 | | CurrentState = State.ReadingEndRecord; |
| | | 783 | | break; |
| | | 784 | | case State.ReadingEndRecord: |
| | | 785 | | recordType = (FramingRecordType)data[0]; |
| | | 786 | | if (recordType == FramingRecordType.End) |
| | | 787 | | { |
| | | 788 | | bytesConsumed = 1; |
| | | 789 | | CurrentState = State.End; |
| | | 790 | | } |
| | | 791 | | else |
| | | 792 | | { |
| | | 793 | | bytesConsumed = 0; |
| | | 794 | | CurrentState = State.ReadingEnvelopeRecord; |
| | | 795 | | } |
| | | 796 | | break; |
| | | 797 | | case State.ReadingEnvelopeRecord: |
| | | 798 | | ValidateRecordType(FramingRecordType.SizedEnvelope, (FramingRecordType)data[0]); |
| | | 799 | | bytesConsumed = 1; |
| | | 800 | | CurrentState = State.ReadingEnvelopeSize; |
| | | 801 | | _sizeDecoder.Reset(); |
| | | 802 | | break; |
| | | 803 | | case State.ReadingEnvelopeSize: |
| | | 804 | | bytesConsumed = _sizeDecoder.Decode(buffer); |
| | | 805 | | if (_sizeDecoder.IsValueDecoded) |
| | | 806 | | { |
| | | 807 | | CurrentState = State.EnvelopeStart; |
| | | 808 | | _envelopeSize = _sizeDecoder.Value; |
| | | 809 | | _envelopeBytesNeeded = _envelopeSize; |
| | | 810 | | } |
| | | 811 | | break; |
| | | 812 | | case State.EnvelopeStart: |
| | | 813 | | bytesConsumed = 0; |
| | | 814 | | CurrentState = State.ReadingEnvelopeBytes; |
| | | 815 | | break; |
| | | 816 | | case State.ReadingEnvelopeBytes: |
| | | 817 | | bytesConsumed = (int)buffer.Length; |
| | | 818 | | if (bytesConsumed > _envelopeBytesNeeded) |
| | | 819 | | { |
| | | 820 | | bytesConsumed = _envelopeBytesNeeded; |
| | | 821 | | } |
| | | 822 | | |
| | | 823 | | _envelopeBytesNeeded -= bytesConsumed; |
| | | 824 | | if (_envelopeBytesNeeded == 0) |
| | | 825 | | { |
| | | 826 | | CurrentState = State.EnvelopeEnd; |
| | | 827 | | } |
| | | 828 | | |
| | | 829 | | break; |
| | | 830 | | case State.EnvelopeEnd: |
| | | 831 | | bytesConsumed = 0; |
| | | 832 | | CurrentState = State.ReadingEndRecord; |
| | | 833 | | break; |
| | | 834 | | case State.End: |
| | | 835 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 836 | | CreateException(new InvalidDataException(SR.FramingAtEnd))); |
| | | 837 | | default: |
| | | 838 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 839 | | CreateException(new InvalidDataException(SR.InvalidDecoderStateMachine))); |
| | | 840 | | } |
| | | 841 | | |
| | | 842 | | Logger.LogEndState(this, bytesConsumed); |
| | | 843 | | return bytesConsumed; |
| | | 844 | | } |
| | | 845 | | catch (InvalidDataException e) |
| | | 846 | | { |
| | | 847 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e)); |
| | | 848 | | } |
| | | 849 | | } |
| | | 850 | | |
| | | 851 | | public enum State |
| | | 852 | | { |
| | | 853 | | ReadingViaRecord, |
| | | 854 | | ReadingViaString, |
| | | 855 | | ReadingContentTypeRecord, |
| | | 856 | | ReadingContentTypeString, |
| | | 857 | | ReadingContentTypeByte, |
| | | 858 | | PreUpgradeStart, |
| | | 859 | | ReadingUpgradeRecord, |
| | | 860 | | ReadingUpgradeString, |
| | | 861 | | UpgradeRequest, |
| | | 862 | | ReadingPreambleEndRecord, |
| | | 863 | | Start, |
| | | 864 | | ReadingEnvelopeRecord, |
| | | 865 | | ReadingEnvelopeSize, |
| | | 866 | | EnvelopeStart, |
| | | 867 | | ReadingEnvelopeBytes, |
| | | 868 | | EnvelopeEnd, |
| | | 869 | | ReadingEndRecord, |
| | | 870 | | End, |
| | | 871 | | } |
| | | 872 | | } |
| | | 873 | | |
| | | 874 | | internal class SingletonMessageDecoder : FramingDecoder |
| | | 875 | | { |
| | | 876 | | private IntDecoder _sizeDecoder; |
| | | 877 | | private int _chunkBytesNeeded; |
| | | 878 | | private int _chunkSize; |
| | | 879 | | |
| | | 880 | | public SingletonMessageDecoder(ILogger logger) : base(logger) |
| | | 881 | | { |
| | | 882 | | _sizeDecoder = new IntDecoder(logger); |
| | | 883 | | CurrentState = State.ChunkStart; |
| | | 884 | | } |
| | | 885 | | |
| | | 886 | | public void Reset() |
| | | 887 | | { |
| | | 888 | | CurrentState = State.ChunkStart; |
| | | 889 | | } |
| | | 890 | | |
| | | 891 | | public State CurrentState { get; private set; } |
| | | 892 | | |
| | | 893 | | protected override string CurrentStateAsString => CurrentState.ToString(); |
| | | 894 | | |
| | | 895 | | public int ChunkSize |
| | | 896 | | { |
| | | 897 | | get |
| | | 898 | | { |
| | | 899 | | if (CurrentState < State.ChunkStart) |
| | | 900 | | { |
| | | 901 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 902 | | } |
| | | 903 | | |
| | | 904 | | return _chunkSize; |
| | | 905 | | } |
| | | 906 | | } |
| | | 907 | | |
| | | 908 | | public override int Decode(ReadOnlySequence<byte> buffer) |
| | | 909 | | { |
| | | 910 | | DecoderHelper.ValidateSize(buffer.Length); |
| | | 911 | | ReadOnlySpan<byte> data = buffer.First.Span; |
| | | 912 | | try |
| | | 913 | | { |
| | | 914 | | int bytesConsumed; |
| | | 915 | | Logger.LogStartState(this); |
| | | 916 | | switch (CurrentState) |
| | | 917 | | { |
| | | 918 | | case State.ReadingEnvelopeChunkSize: |
| | | 919 | | bytesConsumed = _sizeDecoder.Decode(buffer); |
| | | 920 | | if (_sizeDecoder.IsValueDecoded) |
| | | 921 | | { |
| | | 922 | | _chunkSize = _sizeDecoder.Value; |
| | | 923 | | _sizeDecoder.Reset(); |
| | | 924 | | |
| | | 925 | | if (_chunkSize == 0) |
| | | 926 | | { |
| | | 927 | | CurrentState = State.EnvelopeEnd; |
| | | 928 | | } |
| | | 929 | | else |
| | | 930 | | { |
| | | 931 | | CurrentState = State.ChunkStart; |
| | | 932 | | _chunkBytesNeeded = _chunkSize; |
| | | 933 | | } |
| | | 934 | | } |
| | | 935 | | break; |
| | | 936 | | case State.ChunkStart: |
| | | 937 | | bytesConsumed = 0; |
| | | 938 | | CurrentState = State.ReadingEnvelopeBytes; |
| | | 939 | | break; |
| | | 940 | | case State.ReadingEnvelopeBytes: |
| | | 941 | | bytesConsumed = (int)buffer.Length; |
| | | 942 | | if (bytesConsumed > _chunkBytesNeeded) |
| | | 943 | | { |
| | | 944 | | bytesConsumed = _chunkBytesNeeded; |
| | | 945 | | } |
| | | 946 | | _chunkBytesNeeded -= bytesConsumed; |
| | | 947 | | if (_chunkBytesNeeded == 0) |
| | | 948 | | { |
| | | 949 | | CurrentState = State.ChunkEnd; |
| | | 950 | | } |
| | | 951 | | break; |
| | | 952 | | case State.ChunkEnd: |
| | | 953 | | bytesConsumed = 0; |
| | | 954 | | CurrentState = State.ReadingEnvelopeChunkSize; |
| | | 955 | | break; |
| | | 956 | | case State.EnvelopeEnd: |
| | | 957 | | ValidateRecordType(FramingRecordType.End, (FramingRecordType)data[0]); |
| | | 958 | | bytesConsumed = 1; |
| | | 959 | | CurrentState = State.End; |
| | | 960 | | break; |
| | | 961 | | case State.End: |
| | | 962 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 963 | | CreateException(new InvalidDataException(SR.FramingAtEnd))); |
| | | 964 | | |
| | | 965 | | default: |
| | | 966 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 967 | | CreateException(new InvalidDataException(SR.InvalidDecoderStateMachine))); |
| | | 968 | | } |
| | | 969 | | |
| | | 970 | | Logger.LogEndState(this, bytesConsumed); |
| | | 971 | | return bytesConsumed; |
| | | 972 | | } |
| | | 973 | | catch (InvalidDataException e) |
| | | 974 | | { |
| | | 975 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e)); |
| | | 976 | | } |
| | | 977 | | } |
| | | 978 | | |
| | | 979 | | public enum State |
| | | 980 | | { |
| | | 981 | | ReadingEnvelopeChunkSize, |
| | | 982 | | ChunkStart, |
| | | 983 | | ReadingEnvelopeBytes, |
| | | 984 | | ChunkEnd, |
| | | 985 | | EnvelopeEnd, |
| | | 986 | | End, |
| | | 987 | | } |
| | | 988 | | } |
| | | 989 | | |
| | | 990 | | // Pattern: |
| | | 991 | | // Start, |
| | | 992 | | // (UpgradeRequest, upgrade-bytes)*, |
| | | 993 | | // EnvelopeStart, |
| | | 994 | | internal class ServerSingletonDecoder : FramingDecoder |
| | | 995 | | { |
| | | 996 | | private readonly ViaStringDecoder _viaDecoder; |
| | | 997 | | private readonly ContentTypeStringDecoder _contentTypeDecoder; |
| | | 998 | | private string _contentType; |
| | | 999 | | private string _upgrade; |
| | | 1000 | | |
| | | 1001 | | public ServerSingletonDecoder(int maxViaLength, int maxContentTypeLength, ILogger logger) : base(logger) |
| | | 1002 | | { |
| | | 1003 | | _viaDecoder = new ViaStringDecoder(maxViaLength, logger); |
| | | 1004 | | _contentTypeDecoder = new ContentTypeStringDecoder(maxContentTypeLength, logger); |
| | | 1005 | | Reset(); |
| | | 1006 | | } |
| | | 1007 | | |
| | | 1008 | | public void Reset() |
| | | 1009 | | { |
| | | 1010 | | CurrentState = State.ReadingViaRecord; |
| | | 1011 | | } |
| | | 1012 | | |
| | | 1013 | | public State CurrentState { get; private set; } |
| | | 1014 | | |
| | | 1015 | | protected override string CurrentStateAsString => CurrentState.ToString(); |
| | | 1016 | | |
| | | 1017 | | public override Uri Via |
| | | 1018 | | { |
| | | 1019 | | get |
| | | 1020 | | { |
| | | 1021 | | if (CurrentState < State.ReadingContentTypeRecord) |
| | | 1022 | | { |
| | | 1023 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 1024 | | } |
| | | 1025 | | |
| | | 1026 | | return _viaDecoder.ValueAsUri; |
| | | 1027 | | } |
| | | 1028 | | } |
| | | 1029 | | |
| | | 1030 | | public override string ContentType |
| | | 1031 | | { |
| | | 1032 | | get |
| | | 1033 | | { |
| | | 1034 | | if (CurrentState < State.PreUpgradeStart) |
| | | 1035 | | { |
| | | 1036 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 1037 | | } |
| | | 1038 | | |
| | | 1039 | | return _contentType; |
| | | 1040 | | } |
| | | 1041 | | } |
| | | 1042 | | |
| | | 1043 | | public string Upgrade |
| | | 1044 | | { |
| | | 1045 | | get |
| | | 1046 | | { |
| | | 1047 | | if (CurrentState != State.UpgradeRequest) |
| | | 1048 | | { |
| | | 1049 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 1050 | | } |
| | | 1051 | | |
| | | 1052 | | return _upgrade; |
| | | 1053 | | } |
| | | 1054 | | } |
| | | 1055 | | |
| | | 1056 | | public override int Decode(ReadOnlySequence<byte> buffer) |
| | | 1057 | | { |
| | | 1058 | | DecoderHelper.ValidateSize(buffer.Length); |
| | | 1059 | | ReadOnlySpan<byte> data = buffer.First.Span; |
| | | 1060 | | try |
| | | 1061 | | { |
| | | 1062 | | int bytesConsumed; |
| | | 1063 | | FramingRecordType recordType; |
| | | 1064 | | Logger.LogStartState(this); |
| | | 1065 | | switch (CurrentState) |
| | | 1066 | | { |
| | | 1067 | | case State.ReadingViaRecord: |
| | | 1068 | | recordType = (FramingRecordType)data[0]; |
| | | 1069 | | ValidateRecordType(FramingRecordType.Via, recordType); |
| | | 1070 | | bytesConsumed = 1; |
| | | 1071 | | _viaDecoder.Reset(); |
| | | 1072 | | CurrentState = State.ReadingViaString; |
| | | 1073 | | break; |
| | | 1074 | | case State.ReadingViaString: |
| | | 1075 | | bytesConsumed = _viaDecoder.Decode(buffer); |
| | | 1076 | | if (_viaDecoder.IsValueDecoded) |
| | | 1077 | | { |
| | | 1078 | | CurrentState = State.ReadingContentTypeRecord; |
| | | 1079 | | } |
| | | 1080 | | break; |
| | | 1081 | | case State.ReadingContentTypeRecord: |
| | | 1082 | | recordType = (FramingRecordType)data[0]; |
| | | 1083 | | if (recordType == FramingRecordType.KnownEncoding) |
| | | 1084 | | { |
| | | 1085 | | bytesConsumed = 1; |
| | | 1086 | | CurrentState = State.ReadingContentTypeByte; |
| | | 1087 | | } |
| | | 1088 | | else |
| | | 1089 | | { |
| | | 1090 | | ValidateRecordType(FramingRecordType.ExtensibleEncoding, recordType); |
| | | 1091 | | bytesConsumed = 1; |
| | | 1092 | | _contentTypeDecoder.Reset(); |
| | | 1093 | | CurrentState = State.ReadingContentTypeString; |
| | | 1094 | | } |
| | | 1095 | | break; |
| | | 1096 | | case State.ReadingContentTypeByte: |
| | | 1097 | | _contentType = ContentTypeStringDecoder.GetString((FramingEncodingType)data[0]); |
| | | 1098 | | bytesConsumed = 1; |
| | | 1099 | | CurrentState = State.PreUpgradeStart; |
| | | 1100 | | break; |
| | | 1101 | | case State.ReadingContentTypeString: |
| | | 1102 | | bytesConsumed = _contentTypeDecoder.Decode(buffer); |
| | | 1103 | | if (_contentTypeDecoder.IsValueDecoded) |
| | | 1104 | | { |
| | | 1105 | | CurrentState = State.PreUpgradeStart; |
| | | 1106 | | _contentType = _contentTypeDecoder.Value; |
| | | 1107 | | } |
| | | 1108 | | break; |
| | | 1109 | | case State.PreUpgradeStart: |
| | | 1110 | | bytesConsumed = 0; |
| | | 1111 | | CurrentState = State.ReadingUpgradeRecord; |
| | | 1112 | | break; |
| | | 1113 | | case State.ReadingUpgradeRecord: |
| | | 1114 | | recordType = (FramingRecordType)data[0]; |
| | | 1115 | | if (recordType == FramingRecordType.UpgradeRequest) |
| | | 1116 | | { |
| | | 1117 | | bytesConsumed = 1; |
| | | 1118 | | _contentTypeDecoder.Reset(); |
| | | 1119 | | CurrentState = State.ReadingUpgradeString; |
| | | 1120 | | } |
| | | 1121 | | else |
| | | 1122 | | { |
| | | 1123 | | bytesConsumed = 0; |
| | | 1124 | | CurrentState = State.ReadingPreambleEndRecord; |
| | | 1125 | | } |
| | | 1126 | | break; |
| | | 1127 | | case State.ReadingUpgradeString: |
| | | 1128 | | bytesConsumed = _contentTypeDecoder.Decode(buffer); |
| | | 1129 | | if (_contentTypeDecoder.IsValueDecoded) |
| | | 1130 | | { |
| | | 1131 | | CurrentState = State.UpgradeRequest; |
| | | 1132 | | _upgrade = _contentTypeDecoder.Value; |
| | | 1133 | | } |
| | | 1134 | | break; |
| | | 1135 | | case State.UpgradeRequest: |
| | | 1136 | | bytesConsumed = 0; |
| | | 1137 | | CurrentState = State.ReadingUpgradeRecord; |
| | | 1138 | | break; |
| | | 1139 | | case State.ReadingPreambleEndRecord: |
| | | 1140 | | recordType = (FramingRecordType)data[0]; |
| | | 1141 | | ValidateRecordType(FramingRecordType.PreambleEnd, recordType); |
| | | 1142 | | bytesConsumed = 1; |
| | | 1143 | | CurrentState = State.Start; |
| | | 1144 | | break; |
| | | 1145 | | case State.Start: |
| | | 1146 | | bytesConsumed = 0; |
| | | 1147 | | CurrentState = State.ReadingEnvelopeRecord; |
| | | 1148 | | break; |
| | | 1149 | | case State.ReadingEnvelopeRecord: |
| | | 1150 | | ValidateRecordType(FramingRecordType.UnsizedEnvelope, (FramingRecordType)data[0]); |
| | | 1151 | | bytesConsumed = 1; |
| | | 1152 | | CurrentState = State.EnvelopeStart; |
| | | 1153 | | break; |
| | | 1154 | | case State.EnvelopeStart: |
| | | 1155 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 1156 | | CreateException(new InvalidDataException(SR.FramingAtEnd))); |
| | | 1157 | | default: |
| | | 1158 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 1159 | | CreateException(new InvalidDataException(SR.InvalidDecoderStateMachine))); |
| | | 1160 | | } |
| | | 1161 | | |
| | | 1162 | | Logger.LogEndState(this, bytesConsumed); |
| | | 1163 | | return bytesConsumed; |
| | | 1164 | | } |
| | | 1165 | | catch (InvalidDataException e) |
| | | 1166 | | { |
| | | 1167 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e)); |
| | | 1168 | | } |
| | | 1169 | | } |
| | | 1170 | | |
| | | 1171 | | public enum State |
| | | 1172 | | { |
| | | 1173 | | ReadingViaRecord, |
| | | 1174 | | ReadingViaString, |
| | | 1175 | | ReadingContentTypeRecord, |
| | | 1176 | | ReadingContentTypeString, |
| | | 1177 | | ReadingContentTypeByte, |
| | | 1178 | | PreUpgradeStart, |
| | | 1179 | | ReadingUpgradeRecord, |
| | | 1180 | | ReadingUpgradeString, |
| | | 1181 | | UpgradeRequest, |
| | | 1182 | | ReadingPreambleEndRecord, |
| | | 1183 | | Start, |
| | | 1184 | | ReadingEnvelopeRecord, |
| | | 1185 | | EnvelopeStart, |
| | | 1186 | | ReadingEnvelopeChunkSize, |
| | | 1187 | | ChunkStart, |
| | | 1188 | | ReadingEnvelopeChunk, |
| | | 1189 | | ChunkEnd, |
| | | 1190 | | End, |
| | | 1191 | | } |
| | | 1192 | | } |
| | | 1193 | | |
| | | 1194 | | // Pattern: |
| | | 1195 | | // Start, |
| | | 1196 | | // EnvelopeStart, |
| | | 1197 | | internal class ServerSingletonSizedDecoder : FramingDecoder |
| | | 1198 | | { |
| | | 1199 | | private readonly ViaStringDecoder _viaDecoder; |
| | | 1200 | | private readonly ContentTypeStringDecoder _contentTypeDecoder; |
| | | 1201 | | private string _contentType; |
| | | 1202 | | |
| | | 1203 | | public ServerSingletonSizedDecoder(int maxViaLength, int maxContentTypeLength, ILogger logger) : base(logger) |
| | | 1204 | | { |
| | | 1205 | | _viaDecoder = new ViaStringDecoder(maxViaLength, logger); |
| | | 1206 | | _contentTypeDecoder = new ContentTypeStringDecoder(maxContentTypeLength, logger); |
| | | 1207 | | CurrentState = State.ReadingViaRecord; |
| | | 1208 | | } |
| | | 1209 | | |
| | | 1210 | | public override int Decode(ReadOnlySequence<byte> buffer) |
| | | 1211 | | { |
| | | 1212 | | DecoderHelper.ValidateSize(buffer.Length); |
| | | 1213 | | ReadOnlySpan<byte> data = buffer.First.Span; |
| | | 1214 | | try |
| | | 1215 | | { |
| | | 1216 | | int bytesConsumed; |
| | | 1217 | | FramingRecordType recordType; |
| | | 1218 | | Logger.LogStartState(this); |
| | | 1219 | | switch (CurrentState) |
| | | 1220 | | { |
| | | 1221 | | case State.ReadingViaRecord: |
| | | 1222 | | recordType = (FramingRecordType)data[0]; |
| | | 1223 | | ValidateRecordType(FramingRecordType.Via, recordType); |
| | | 1224 | | bytesConsumed = 1; |
| | | 1225 | | _viaDecoder.Reset(); |
| | | 1226 | | CurrentState = State.ReadingViaString; |
| | | 1227 | | break; |
| | | 1228 | | case State.ReadingViaString: |
| | | 1229 | | bytesConsumed = _viaDecoder.Decode(buffer); |
| | | 1230 | | if (_viaDecoder.IsValueDecoded) |
| | | 1231 | | { |
| | | 1232 | | CurrentState = State.ReadingContentTypeRecord; |
| | | 1233 | | } |
| | | 1234 | | |
| | | 1235 | | break; |
| | | 1236 | | case State.ReadingContentTypeRecord: |
| | | 1237 | | recordType = (FramingRecordType)data[0]; |
| | | 1238 | | if (recordType == FramingRecordType.KnownEncoding) |
| | | 1239 | | { |
| | | 1240 | | bytesConsumed = 1; |
| | | 1241 | | CurrentState = State.ReadingContentTypeByte; |
| | | 1242 | | } |
| | | 1243 | | else |
| | | 1244 | | { |
| | | 1245 | | ValidateRecordType(FramingRecordType.ExtensibleEncoding, recordType); |
| | | 1246 | | bytesConsumed = 1; |
| | | 1247 | | _contentTypeDecoder.Reset(); |
| | | 1248 | | CurrentState = State.ReadingContentTypeString; |
| | | 1249 | | } |
| | | 1250 | | break; |
| | | 1251 | | case State.ReadingContentTypeByte: |
| | | 1252 | | _contentType = ContentTypeStringDecoder.GetString((FramingEncodingType)data[0]); |
| | | 1253 | | bytesConsumed = 1; |
| | | 1254 | | CurrentState = State.Start; |
| | | 1255 | | break; |
| | | 1256 | | case State.ReadingContentTypeString: |
| | | 1257 | | bytesConsumed = _contentTypeDecoder.Decode(buffer); |
| | | 1258 | | if (_contentTypeDecoder.IsValueDecoded) |
| | | 1259 | | { |
| | | 1260 | | CurrentState = State.Start; |
| | | 1261 | | _contentType = _contentTypeDecoder.Value; |
| | | 1262 | | } |
| | | 1263 | | break; |
| | | 1264 | | case State.Start: |
| | | 1265 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 1266 | | CreateException(new InvalidDataException(SR.FramingAtEnd))); |
| | | 1267 | | default: |
| | | 1268 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( |
| | | 1269 | | CreateException(new InvalidDataException(SR.InvalidDecoderStateMachine))); |
| | | 1270 | | } |
| | | 1271 | | |
| | | 1272 | | Logger.LogEndState(this, bytesConsumed); |
| | | 1273 | | return bytesConsumed; |
| | | 1274 | | } |
| | | 1275 | | catch (InvalidDataException e) |
| | | 1276 | | { |
| | | 1277 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e)); |
| | | 1278 | | } |
| | | 1279 | | } |
| | | 1280 | | |
| | | 1281 | | public void Reset(long streamPosition) |
| | | 1282 | | { |
| | | 1283 | | CurrentState = State.ReadingViaRecord; |
| | | 1284 | | } |
| | | 1285 | | |
| | | 1286 | | public State CurrentState { get; private set; } |
| | | 1287 | | |
| | | 1288 | | protected override string CurrentStateAsString => CurrentState.ToString(); |
| | | 1289 | | |
| | | 1290 | | public override Uri Via |
| | | 1291 | | { |
| | | 1292 | | get |
| | | 1293 | | { |
| | | 1294 | | if (CurrentState < State.ReadingContentTypeRecord) |
| | | 1295 | | { |
| | | 1296 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 1297 | | } |
| | | 1298 | | |
| | | 1299 | | return _viaDecoder.ValueAsUri; |
| | | 1300 | | } |
| | | 1301 | | } |
| | | 1302 | | |
| | | 1303 | | public override string ContentType |
| | | 1304 | | { |
| | | 1305 | | get |
| | | 1306 | | { |
| | | 1307 | | if (CurrentState < State.Start) |
| | | 1308 | | { |
| | | 1309 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.FramingVa |
| | | 1310 | | } |
| | | 1311 | | |
| | | 1312 | | return _contentType; |
| | | 1313 | | } |
| | | 1314 | | } |
| | | 1315 | | |
| | | 1316 | | public enum State |
| | | 1317 | | { |
| | | 1318 | | ReadingViaRecord, |
| | | 1319 | | ReadingViaString, |
| | | 1320 | | ReadingContentTypeRecord, |
| | | 1321 | | ReadingContentTypeString, |
| | | 1322 | | ReadingContentTypeByte, |
| | | 1323 | | Start, |
| | | 1324 | | } |
| | | 1325 | | } |
| | | 1326 | | } |