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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
{
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/// <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 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 ( ) ;
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 < 2 ) 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 ;
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if ( parts . Length > = 3 )
{
message . ReasonPhrase = parts [ 2 ] . Trim ( ) ;
}
}
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#endregion
}
}