95 lines
3.5 KiB
C#
95 lines
3.5 KiB
C#
using System;
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using System.Linq;
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using System.Net;
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using System.Net.Http;
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namespace Rssdp.Infrastructure
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{
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/// <summary>
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/// Parses a string into a <see cref="HttpResponseMessage"/> or throws an exception.
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/// </summary>
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public sealed class HttpResponseParser : HttpParserBase<HttpResponseMessage>
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{
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private readonly string[] ContentHeaderNames = new string[]
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{
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"Allow", "Content-Disposition", "Content-Encoding", "Content-Language", "Content-Length", "Content-Location", "Content-MD5", "Content-Range", "Content-Type", "Expires", "Last-Modified"
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};
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/// <summary>
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/// Parses the specified data into a <see cref="HttpResponseMessage"/> instance.
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/// </summary>
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/// <param name="data">A string containing the data to parse.</param>
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/// <returns>A <see cref="HttpResponseMessage"/> instance containing the parsed data.</returns>
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public override HttpResponseMessage Parse(string data)
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{
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HttpResponseMessage retVal = null;
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try
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{
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retVal = new HttpResponseMessage();
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Parse(retVal, retVal.Headers, data);
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return retVal;
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}
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catch
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{
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if (retVal != null)
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{
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retVal.Dispose();
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}
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throw;
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}
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}
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/// <summary>
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/// Returns a boolean indicating whether the specified HTTP header name represents a content header (true), or a message header (false).
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/// </summary>
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/// <param name="headerName">A string containing the name of the header to return the type of.</param>
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/// <returns>A boolean, true if th specified header relates to HTTP content, otherwise false.</returns>
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protected override bool IsContentHeader(string headerName)
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{
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return ContentHeaderNames.Contains(headerName, StringComparer.OrdinalIgnoreCase);
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}
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/// <summary>
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/// Used to parse the first line of an HTTP request or response and assign the values to the appropriate properties on the <paramref name="message"/>.
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/// </summary>
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/// <param name="data">The first line of the HTTP message to be parsed.</param>
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/// <param name="message">Either a <see cref="HttpResponseMessage"/> or <see cref="HttpRequestMessage"/> to assign the parsed values to.</param>
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protected override void ParseStatusLine(string data, HttpResponseMessage message)
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{
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if (data == null)
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{
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throw new ArgumentNullException(nameof(data));
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}
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if (message == null)
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{
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throw new ArgumentNullException(nameof(message));
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}
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var parts = data.Split(' ');
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if (parts.Length < 2)
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{
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throw new ArgumentException("data status line is invalid. Insufficient status parts.", nameof(data));
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}
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message.Version = ParseHttpVersion(parts[0].Trim());
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int statusCode = -1;
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if (!Int32.TryParse(parts[1].Trim(), out statusCode))
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{
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throw new ArgumentException("data status line is invalid. Status code is not a valid integer.", nameof(data));
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}
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message.StatusCode = (HttpStatusCode)statusCode;
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if (parts.Length >= 3)
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{
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message.ReasonPhrase = parts[2].Trim();
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}
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}
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}
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}
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