diff options
Diffstat (limited to 'RSSDP/HttpParserBase.cs')
| -rw-r--r-- | RSSDP/HttpParserBase.cs | 80 |
1 files changed, 51 insertions, 29 deletions
diff --git a/RSSDP/HttpParserBase.cs b/RSSDP/HttpParserBase.cs index 773a06cdb..a40612bc2 100644 --- a/RSSDP/HttpParserBase.cs +++ b/RSSDP/HttpParserBase.cs @@ -11,16 +11,9 @@ namespace Rssdp.Infrastructure /// <typeparam name="T"></typeparam> public abstract class HttpParserBase<T> where T : new() { - - #region Fields - private readonly string[] LineTerminators = new string[] { "\r\n", "\n" }; private readonly char[] SeparatorCharacters = new char[] { ',', ';' }; - #endregion - - #region Public Methods - /// <summary> /// Parses the <paramref name="data"/> provided into either a <see cref="HttpRequestMessage"/> or <see cref="HttpResponseMessage"/> object. /// </summary> @@ -38,15 +31,26 @@ namespace Rssdp.Infrastructure [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2202:Do not dispose objects multiple times", Justification = "Honestly, it's fine. MemoryStream doesn't mind.")] protected virtual void Parse(T message, System.Net.Http.Headers.HttpHeaders headers, string data) { - if (data == null) throw new ArgumentNullException(nameof(data)); - if (data.Length == 0) throw new ArgumentException("data cannot be an empty string.", nameof(data)); - if (!LineTerminators.Any(data.Contains)) throw new ArgumentException("data is not a valid request, it does not contain any CRLF/LF terminators.", nameof(data)); + if (data == null) + { + throw new ArgumentNullException(nameof(data)); + } + + if (data.Length == 0) + { + throw new ArgumentException("data cannot be an empty string.", nameof(data)); + } + + if (!LineTerminators.Any(data.Contains)) + { + throw new ArgumentException("data is not a valid request, it does not contain any CRLF/LF terminators.", nameof(data)); + } using (var retVal = new ByteArrayContent(Array.Empty<byte>())) { var lines = data.Split(LineTerminators, StringSplitOptions.None); - //First line is the 'request' line containing http protocol details like method, uri, http version etc. + // First line is the 'request' line containing http protocol details like method, uri, http version etc. ParseStatusLine(lines[0], message); ParseHeaders(headers, retVal.Headers, lines); @@ -73,18 +77,20 @@ namespace Rssdp.Infrastructure /// <returns>A <see cref="Version"/> object containing the parsed version data.</returns> protected Version ParseHttpVersion(string versionData) { - if (versionData == null) throw new ArgumentNullException(nameof(versionData)); + if (versionData == null) + { + throw new ArgumentNullException(nameof(versionData)); + } var versionSeparatorIndex = versionData.IndexOf('/'); - if (versionSeparatorIndex <= 0 || versionSeparatorIndex == versionData.Length) throw new ArgumentException("request header line is invalid. Http Version not supplied or incorrect format.", nameof(versionData)); + if (versionSeparatorIndex <= 0 || versionSeparatorIndex == versionData.Length) + { + throw new ArgumentException("request header line is invalid. Http Version not supplied or incorrect format.", nameof(versionData)); + } return Version.Parse(versionData.Substring(versionSeparatorIndex + 1)); } - #endregion - - #region Private Methods - /// <summary> /// Parses a line from an HTTP request or response message containing a header name and value pair. /// </summary> @@ -93,35 +99,39 @@ namespace Rssdp.Infrastructure /// <param name="contentHeaders">A reference to a <see cref="System.Net.Http.Headers.HttpHeaders"/> collection for the message content, to which the parsed header will be added.</param> private void ParseHeader(string line, System.Net.Http.Headers.HttpHeaders headers, System.Net.Http.Headers.HttpHeaders contentHeaders) { - //Header format is - //name: value + // Header format is + // name: value var headerKeySeparatorIndex = line.IndexOf(":", StringComparison.OrdinalIgnoreCase); var headerName = line.Substring(0, headerKeySeparatorIndex).Trim(); var headerValue = line.Substring(headerKeySeparatorIndex + 1).Trim(); - //Not sure how to determine where request headers and and content headers begin, - //at least not without a known set of headers (general headers first the content headers) - //which seems like a bad way of doing it. So we'll assume if it's a known content header put it there - //else use request headers. + // Not sure how to determine where request headers and and content headers begin, + // at least not without a known set of headers (general headers first the content headers) + // which seems like a bad way of doing it. So we'll assume if it's a known content header put it there + // else use request headers. var values = ParseValues(headerValue); var headersToAddTo = IsContentHeader(headerName) ? contentHeaders : headers; if (values.Count > 1) + { headersToAddTo.TryAddWithoutValidation(headerName, values); + } else + { headersToAddTo.TryAddWithoutValidation(headerName, values.First()); + } } private int ParseHeaders(System.Net.Http.Headers.HttpHeaders headers, System.Net.Http.Headers.HttpHeaders contentHeaders, string[] lines) { - //Blank line separates headers from content, so read headers until we find blank line. + // Blank line separates headers from content, so read headers until we find blank line. int lineIndex = 1; string line = null, nextLine = null; while (lineIndex + 1 < lines.Length && !String.IsNullOrEmpty((line = lines[lineIndex++]))) { - //If the following line starts with space or tab (or any whitespace), it is really part of this header but split for human readability. - //Combine these lines into a single comma separated style header for easier parsing. + // If the following line starts with space or tab (or any whitespace), it is really part of this header but split for human readability. + // Combine these lines into a single comma separated style header for easier parsing. while (lineIndex < lines.Length && !String.IsNullOrEmpty((nextLine = lines[lineIndex]))) { if (nextLine.Length > 0 && Char.IsWhiteSpace(nextLine[0])) @@ -130,11 +140,14 @@ namespace Rssdp.Infrastructure lineIndex++; } else + { break; + } } ParseHeader(line, headers, contentHeaders); } + return lineIndex; } @@ -153,7 +166,9 @@ namespace Rssdp.Infrastructure var indexOfSeparator = headerValue.IndexOfAny(SeparatorCharacters); if (indexOfSeparator <= 0) + { values.Add(headerValue); + } else { var segments = headerValue.Split(SeparatorCharacters); @@ -163,13 +178,17 @@ namespace Rssdp.Infrastructure { var segment = segments[segmentIndex]; if (segment.Trim().StartsWith("\"", StringComparison.OrdinalIgnoreCase)) + { segment = CombineQuotedSegments(segments, ref segmentIndex, segment); + } values.Add(segment); } } else + { values.AddRange(segments); + } } return values; @@ -192,17 +211,20 @@ namespace Rssdp.Infrastructure } if (index + 1 < segments.Length) + { trimmedSegment += "," + segments[index + 1].TrimEnd(); + } } segmentIndex = segments.Length; if (trimmedSegment.StartsWith("\"", StringComparison.OrdinalIgnoreCase) && trimmedSegment.EndsWith("\"", StringComparison.OrdinalIgnoreCase)) + { return trimmedSegment.Substring(1, trimmedSegment.Length - 2); + } else + { return trimmedSegment; + } } - - #endregion - } } |