jellyfin/Emby.Server.Implementations/SocketSharp/WebSocketSharpRequest.cs
2019-04-12 15:25:18 +02:00

327 lines
10 KiB
C#

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Net;
using System.Text;
using MediaBrowser.Common.Net;
using MediaBrowser.Model.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Extensions;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Primitives;
using Microsoft.Net.Http.Headers;
using IHttpFile = MediaBrowser.Model.Services.IHttpFile;
using IHttpRequest = MediaBrowser.Model.Services.IHttpRequest;
using IResponse = MediaBrowser.Model.Services.IResponse;
namespace Emby.Server.Implementations.SocketSharp
{
public partial class WebSocketSharpRequest : IHttpRequest
{
private readonly HttpRequest request;
public WebSocketSharpRequest(HttpRequest httpContext, HttpResponse response, string operationName, ILogger logger)
{
this.OperationName = operationName;
this.request = httpContext;
this.Response = new WebSocketSharpResponse(logger, response);
}
public HttpRequest HttpRequest => request;
public IResponse Response { get; }
public string OperationName { get; set; }
public object Dto { get; set; }
public string RawUrl => request.GetEncodedPathAndQuery();
public string AbsoluteUri => request.GetDisplayUrl().TrimEnd('/');
// Header[name] returns "" when undefined
private string GetHeader(string name) => request.Headers[name].ToString();
private string remoteIp;
public string RemoteIp
{
get
{
if (remoteIp != null)
{
return remoteIp;
}
IPAddress ip;
// "Real" remote ip might be in X-Forwarded-For of X-Real-Ip
// (if the server is behind a reverse proxy for example)
if (!IPAddress.TryParse(GetHeader(CustomHeaderNames.XForwardedFor), out ip))
{
if (!IPAddress.TryParse(GetHeader(CustomHeaderNames.XRealIP), out ip))
{
ip = request.HttpContext.Connection.RemoteIpAddress;
}
}
return remoteIp = NormalizeIp(ip).ToString();
}
}
private static IPAddress NormalizeIp(IPAddress ip)
{
if (ip.IsIPv4MappedToIPv6)
{
return ip.MapToIPv4();
}
return ip;
}
public string[] AcceptTypes => request.Headers.GetCommaSeparatedValues(HeaderNames.Accept);
private Dictionary<string, object> items;
public Dictionary<string, object> Items => items ?? (items = new Dictionary<string, object>());
private string responseContentType;
public string ResponseContentType
{
get =>
responseContentType
?? (responseContentType = GetResponseContentType(HttpRequest));
set => this.responseContentType = value;
}
public const string FormUrlEncoded = "application/x-www-form-urlencoded";
public const string MultiPartFormData = "multipart/form-data";
public static string GetResponseContentType(HttpRequest httpReq)
{
var specifiedContentType = GetQueryStringContentType(httpReq);
if (!string.IsNullOrEmpty(specifiedContentType))
{
return specifiedContentType;
}
const string serverDefaultContentType = "application/json";
var acceptContentTypes = httpReq.Headers.GetCommaSeparatedValues(HeaderNames.Accept);
string defaultContentType = null;
if (HasAnyOfContentTypes(httpReq, FormUrlEncoded, MultiPartFormData))
{
defaultContentType = serverDefaultContentType;
}
var acceptsAnything = false;
var hasDefaultContentType = defaultContentType != null;
if (acceptContentTypes != null)
{
foreach (var acceptsType in acceptContentTypes)
{
// TODO: @bond move to Span when Span.Split lands
// https://github.com/dotnet/corefx/issues/26528
var contentType = acceptsType?.Split(';')[0].Trim();
acceptsAnything = contentType.Equals("*/*", StringComparison.OrdinalIgnoreCase);
if (acceptsAnything)
{
break;
}
}
if (acceptsAnything)
{
if (hasDefaultContentType)
{
return defaultContentType;
}
else
{
return serverDefaultContentType;
}
}
}
if (acceptContentTypes == null && httpReq.ContentType == Soap11)
{
return Soap11;
}
// We could also send a '406 Not Acceptable', but this is allowed also
return serverDefaultContentType;
}
public const string Soap11 = "text/xml; charset=utf-8";
public static bool HasAnyOfContentTypes(HttpRequest request, params string[] contentTypes)
{
if (contentTypes == null || request.ContentType == null)
{
return false;
}
foreach (var contentType in contentTypes)
{
if (IsContentType(request, contentType))
{
return true;
}
}
return false;
}
public static bool IsContentType(HttpRequest request, string contentType)
{
return request.ContentType.StartsWith(contentType, StringComparison.OrdinalIgnoreCase);
}
private static string GetQueryStringContentType(HttpRequest httpReq)
{
ReadOnlySpan<char> format = httpReq.Query["format"].ToString().AsSpan();
if (format == null)
{
const int formatMaxLength = 4;
ReadOnlySpan<char> pi = httpReq.Path.ToString().AsSpan();
if (pi == null || pi.Length <= formatMaxLength)
{
return null;
}
if (pi[0] == '/')
{
pi = pi.Slice(1);
}
format = LeftPart(pi, '/');
if (format.Length > formatMaxLength)
{
return null;
}
}
format = LeftPart(format, '.');
if (format.Contains("json".AsSpan(), StringComparison.OrdinalIgnoreCase))
{
return "application/json";
}
else if (format.Contains("xml".AsSpan(), StringComparison.OrdinalIgnoreCase))
{
return "application/xml";
}
return null;
}
public static ReadOnlySpan<char> LeftPart(ReadOnlySpan<char> strVal, char needle)
{
if (strVal == null)
{
return null;
}
var pos = strVal.IndexOf(needle);
return pos == -1 ? strVal : strVal.Slice(0, pos);
}
public string PathInfo => this.request.Path.Value;
public string UserAgent => request.Headers[HeaderNames.UserAgent];
public IHeaderDictionary Headers => request.Headers;
public IQueryCollection QueryString => request.Query;
public bool IsLocal => string.Equals(request.HttpContext.Connection.LocalIpAddress.ToString(), request.HttpContext.Connection.RemoteIpAddress.ToString());
private string httpMethod;
public string HttpMethod =>
httpMethod
?? (httpMethod = request.Method);
public string Verb => HttpMethod;
public string ContentType => request.ContentType;
private Encoding ContentEncoding
{
get
{
// TODO is this necessary?
if (UserAgent != null && CultureInfo.InvariantCulture.CompareInfo.IsPrefix(UserAgent, "UP"))
{
string postDataCharset = Headers["x-up-devcap-post-charset"];
if (!string.IsNullOrEmpty(postDataCharset))
{
try
{
return Encoding.GetEncoding(postDataCharset);
}
catch (ArgumentException)
{
}
}
}
return request.GetTypedHeaders().ContentType.Encoding ?? Encoding.UTF8;
}
}
public Uri UrlReferrer => request.GetTypedHeaders().Referer;
public static Encoding GetEncoding(string contentTypeHeader)
{
var param = GetParameter(contentTypeHeader.AsSpan(), "charset=");
if (param == null)
{
return null;
}
try
{
return Encoding.GetEncoding(param);
}
catch (ArgumentException)
{
return null;
}
}
public Stream InputStream => request.Body;
public long ContentLength => request.ContentLength ?? 0;
private IHttpFile[] httpFiles;
public IHttpFile[] Files
{
get
{
if (httpFiles == null)
{
if (files == null)
{
return httpFiles = Array.Empty<IHttpFile>();
}
httpFiles = new IHttpFile[files.Count];
var i = 0;
foreach (var pair in files)
{
var reqFile = pair.Value;
httpFiles[i] = new HttpFile
{
ContentType = reqFile.ContentType,
ContentLength = reqFile.ContentLength,
FileName = reqFile.FileName,
InputStream = reqFile.InputStream,
};
i++;
}
}
return httpFiles;
}
}
}
}