///////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   RemoteHttpRequest.sg
//
//  Note:
//    This file wraps a WebServer's Request object so it is callable through
//    the Microsoft.Singularity.WebApps.IHttpRequest interface that web
//    applications understand.
//    regular object.
//

using System;
using Microsoft.SingSharp;
using Microsoft.SingSharp.Runtime;
using Microsoft.Singularity;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.WebApps;
using System.Web;

namespace Microsoft.Singularity.WebServer
{
    internal sealed class LocalHttpRequest : IHttpRequest
    {
        private Request! request;

        internal LocalHttpRequest(Request! request)
        {
            this.request = request;
            base();
        }

        public string! GetUriPath()
        { return (!)request.GetUriPath(); }

        public string GetQueryString()
        { return request.GetQueryString(); }

        public string GetVerb()
        { return request.GetHttpVerbName(); }

        public string GetHeader(string! headerName)
        {
            int knownIndex = HttpWorkerRequest.GetKnownRequestHeaderIndex(headerName);

            if (knownIndex > 0) {
                return request.GetKnownRequestHeader(knownIndex);
            } else {
                return request.GetUnknownRequestHeader(headerName);
            }
        }

        public string! GetRemoteAddress()
        { return request.GetRemoteAddress(); }

        // Caller should not modify this buffer!
        public byte[] GetBodyData()
        {
            // NOTE We don't currently deal with the
            // possibility that there is more body data not
            // yet read in.
            assert request.IsEntireEntityBodyIsPreloaded();
            return request.GetPreloadedEntityBody();
        }

        public void SendStatus(int code, string! description)
        { request.SendStatus(code, description); }

        public void SendHeader(string! name, string! value)
        {
            int index = HttpWorkerRequest.GetKnownResponseHeaderIndex(name);

            if (index == -1) {
                request.SendUnknownResponseHeader(name, value);
            }
            else {
                request.SendKnownResponseHeader(index, value);
            }
        }

        public void SendBodyData(byte[]! data)
        {
            request.SendResponseFromMemory(data, data.Length);
            request.FlushResponse(false); // always transmit immediately
        }

        public void SendBodyData([Claims] byte[]! in ExHeap data)
        {
            request.SendResponseFromMemory(data);
            request.FlushResponse(false); // always transmit immediately
        }

        public void Done()
        {
            request.FlushResponse(true);
            request.EndOfRequest();
        }
    }
}