using System;
using System.Linq;
using System.Net.Http;
namespace Rssdp.Infrastructure
{
///
/// Parses a string into a or throws an exception.
///
public sealed class HttpRequestParser : HttpParserBase
{
private 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"
};
///
/// Parses the specified data into a instance.
///
/// A string containing the data to parse.
/// A instance containing the parsed data.
public override HttpRequestMessage Parse(string data)
{
HttpRequestMessage retVal = null;
try
{
retVal = new HttpRequestMessage();
Parse(retVal, retVal.Headers, data);
return retVal;
}
finally
{
if (retVal != null)
retVal.Dispose();
}
}
///
/// Used to parse the first line of an HTTP request or response and assign the values to the appropriate properties on the .
///
/// The first line of the HTTP message to be parsed.
/// Either a or to assign the parsed values to.
protected override void ParseStatusLine(string data, HttpRequestMessage message)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
var parts = data.Split(' ');
if (parts.Length < 2)
{
throw new ArgumentException("Status line is invalid. Insufficient status parts.", nameof(data));
}
message.Method = new HttpMethod(parts[0].Trim());
Uri requestUri;
if (Uri.TryCreate(parts[1].Trim(), UriKind.RelativeOrAbsolute, out requestUri))
message.RequestUri = requestUri;
else
System.Diagnostics.Debug.WriteLine(parts[1]);
if (parts.Length >= 3)
{
message.Version = ParseHttpVersion(parts[2].Trim());
}
}
///
/// Returns a boolean indicating whether the specified HTTP header name represents a content header (true), or a message header (false).
///
/// A string containing the name of the header to return the type of.
protected override bool IsContentHeader(string headerName)
{
return ContentHeaderNames.Contains(headerName, StringComparer.OrdinalIgnoreCase);
}
}
}