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