489 lines
16 KiB
C#
489 lines
16 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Net;
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using System.Text;
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using Emby.Server.Implementations.HttpServer;
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using MediaBrowser.Model.Services;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.Extensions;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Primitives;
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using Microsoft.Net.Http.Headers;
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using IHttpFile = MediaBrowser.Model.Services.IHttpFile;
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using IHttpRequest = MediaBrowser.Model.Services.IHttpRequest;
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using IResponse = MediaBrowser.Model.Services.IResponse;
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namespace Emby.Server.Implementations.SocketSharp
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{
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public partial class WebSocketSharpRequest : IHttpRequest
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{
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private readonly HttpRequest request;
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private readonly IResponse response;
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public WebSocketSharpRequest(HttpRequest httpContext, HttpResponse response, string operationName, ILogger logger)
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{
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this.OperationName = operationName;
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this.request = httpContext;
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this.response = new WebSocketSharpResponse(logger, response, this);
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// HandlerFactoryPath = GetHandlerPathIfAny(UrlPrefixes[0]);
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}
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public HttpRequest HttpRequest => request;
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public IResponse Response => response;
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public IResponse HttpResponse => response;
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public string OperationName { get; set; }
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public object Dto { get; set; }
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public string RawUrl => request.GetEncodedPathAndQuery();
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public string AbsoluteUri => request.GetDisplayUrl().TrimEnd('/');
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public string XForwardedFor
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=> StringValues.IsNullOrEmpty(request.Headers["X-Forwarded-For"]) ? null : request.Headers["X-Forwarded-For"].ToString();
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public int? XForwardedPort
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=> StringValues.IsNullOrEmpty(request.Headers["X-Forwarded-Port"]) ? (int?)null : int.Parse(request.Headers["X-Forwarded-Port"], CultureInfo.InvariantCulture);
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public string XForwardedProtocol => StringValues.IsNullOrEmpty(request.Headers["X-Forwarded-Proto"]) ? null : request.Headers["X-Forwarded-Proto"].ToString();
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public string XRealIp => StringValues.IsNullOrEmpty(request.Headers["X-Real-IP"]) ? null : request.Headers["X-Real-IP"].ToString();
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private string remoteIp;
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public string RemoteIp =>
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remoteIp ??
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(remoteIp = CheckBadChars(XForwardedFor) ??
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NormalizeIp(CheckBadChars(XRealIp) ??
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(string.IsNullOrEmpty(request.HttpContext.Connection.RemoteIpAddress.ToString()) ? null : NormalizeIp(request.HttpContext.Connection.RemoteIpAddress.ToString()))));
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private static readonly char[] HttpTrimCharacters = new char[] { (char)0x09, (char)0xA, (char)0xB, (char)0xC, (char)0xD, (char)0x20 };
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// CheckBadChars - throws on invalid chars to be not found in header name/value
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internal static string CheckBadChars(string name)
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{
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if (name == null || name.Length == 0)
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{
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return name;
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}
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// VALUE check
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// Trim spaces from both ends
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name = name.Trim(HttpTrimCharacters);
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// First, check for correctly formed multi-line value
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// Second, check for absence of CTL characters
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int crlf = 0;
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for (int i = 0; i < name.Length; ++i)
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{
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char c = (char)(0x000000ff & (uint)name[i]);
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switch (crlf)
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{
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case 0:
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{
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if (c == '\r')
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{
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crlf = 1;
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}
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else if (c == '\n')
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{
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// Technically this is bad HTTP. But it would be a breaking change to throw here.
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// Is there an exploit?
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crlf = 2;
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}
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else if (c == 127 || (c < ' ' && c != '\t'))
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{
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throw new ArgumentException("net_WebHeaderInvalidControlChars");
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}
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break;
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}
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case 1:
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{
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if (c == '\n')
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{
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crlf = 2;
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break;
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}
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throw new ArgumentException("net_WebHeaderInvalidCRLFChars");
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}
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case 2:
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{
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if (c == ' ' || c == '\t')
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{
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crlf = 0;
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break;
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}
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throw new ArgumentException("net_WebHeaderInvalidCRLFChars");
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}
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}
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}
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if (crlf != 0)
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{
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throw new ArgumentException("net_WebHeaderInvalidCRLFChars");
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}
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return name;
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}
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private string NormalizeIp(string ip)
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{
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if (!string.IsNullOrWhiteSpace(ip))
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{
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// Handle ipv4 mapped to ipv6
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const string srch = "::ffff:";
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var index = ip.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
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if (index == 0)
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{
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ip = ip.Substring(srch.Length);
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}
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}
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return ip;
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}
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public string[] AcceptTypes => request.Headers.GetCommaSeparatedValues(HeaderNames.Accept);
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private Dictionary<string, object> items;
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public Dictionary<string, object> Items => items ?? (items = new Dictionary<string, object>());
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private string responseContentType;
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public string ResponseContentType
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{
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get =>
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responseContentType
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?? (responseContentType = GetResponseContentType(HttpRequest));
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set => this.responseContentType = value;
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}
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public const string FormUrlEncoded = "application/x-www-form-urlencoded";
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public const string MultiPartFormData = "multipart/form-data";
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public static string GetResponseContentType(HttpRequest httpReq)
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{
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var specifiedContentType = GetQueryStringContentType(httpReq);
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if (!string.IsNullOrEmpty(specifiedContentType))
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{
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return specifiedContentType;
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}
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const string serverDefaultContentType = "application/json";
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var acceptContentTypes = httpReq.Headers.GetCommaSeparatedValues(HeaderNames.Accept);
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string defaultContentType = null;
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if (HasAnyOfContentTypes(httpReq, FormUrlEncoded, MultiPartFormData))
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{
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defaultContentType = serverDefaultContentType;
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}
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var acceptsAnything = false;
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var hasDefaultContentType = defaultContentType != null;
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if (acceptContentTypes != null)
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{
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foreach (var acceptsType in acceptContentTypes)
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{
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// TODO: @bond move to Span when Span.Split lands
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// https://github.com/dotnet/corefx/issues/26528
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var contentType = acceptsType?.Split(';')[0].Trim();
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acceptsAnything = contentType.Equals("*/*", StringComparison.OrdinalIgnoreCase);
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if (acceptsAnything)
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{
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break;
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}
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}
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if (acceptsAnything)
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{
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if (hasDefaultContentType)
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{
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return defaultContentType;
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}
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else
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{
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return serverDefaultContentType;
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}
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}
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}
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if (acceptContentTypes == null && httpReq.ContentType == Soap11)
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{
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return Soap11;
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}
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// We could also send a '406 Not Acceptable', but this is allowed also
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return serverDefaultContentType;
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}
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public const string Soap11 = "text/xml; charset=utf-8";
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public static bool HasAnyOfContentTypes(HttpRequest request, params string[] contentTypes)
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{
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if (contentTypes == null || request.ContentType == null)
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{
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return false;
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}
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foreach (var contentType in contentTypes)
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{
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if (IsContentType(request, contentType))
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{
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return true;
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}
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}
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return false;
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}
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public static bool IsContentType(HttpRequest request, string contentType)
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{
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return request.ContentType.StartsWith(contentType, StringComparison.OrdinalIgnoreCase);
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}
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private static string GetQueryStringContentType(HttpRequest httpReq)
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{
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ReadOnlySpan<char> format = httpReq.Query["format"].ToString().AsSpan();
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if (format == null)
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{
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const int formatMaxLength = 4;
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ReadOnlySpan<char> pi = httpReq.Path.ToString().AsSpan();
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if (pi == null || pi.Length <= formatMaxLength)
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{
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return null;
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}
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if (pi[0] == '/')
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{
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pi = pi.Slice(1);
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}
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format = LeftPart(pi, '/');
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if (format.Length > formatMaxLength)
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{
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return null;
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}
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}
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format = LeftPart(format, '.');
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if (format.Contains("json".AsSpan(), StringComparison.OrdinalIgnoreCase))
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{
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return "application/json";
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}
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else if (format.Contains("xml".AsSpan(), StringComparison.OrdinalIgnoreCase))
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{
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return "application/xml";
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}
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return null;
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}
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public static ReadOnlySpan<char> LeftPart(ReadOnlySpan<char> strVal, char needle)
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{
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if (strVal == null)
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{
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return null;
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}
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var pos = strVal.IndexOf(needle);
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return pos == -1 ? strVal : strVal.Slice(0, pos);
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}
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public static string HandlerFactoryPath;
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private string pathInfo;
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public string PathInfo
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{
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get
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{
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if (this.pathInfo == null)
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{
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var mode = HandlerFactoryPath;
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var pos = RawUrl.IndexOf("?", StringComparison.Ordinal);
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if (pos != -1)
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{
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var path = RawUrl.Substring(0, pos);
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this.pathInfo = GetPathInfo(
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path,
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mode,
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mode ?? string.Empty);
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}
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else
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{
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this.pathInfo = RawUrl;
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}
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this.pathInfo = WebUtility.UrlDecode(pathInfo);
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this.pathInfo = NormalizePathInfo(pathInfo, mode);
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}
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return this.pathInfo;
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}
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}
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private static string GetPathInfo(string fullPath, string mode, string appPath)
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{
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var pathInfo = ResolvePathInfoFromMappedPath(fullPath, mode);
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if (!string.IsNullOrEmpty(pathInfo))
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{
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return pathInfo;
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}
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// Wildcard mode relies on this to work out the handlerPath
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pathInfo = ResolvePathInfoFromMappedPath(fullPath, appPath);
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if (!string.IsNullOrEmpty(pathInfo))
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{
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return pathInfo;
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}
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return fullPath;
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}
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private static string ResolvePathInfoFromMappedPath(string fullPath, string mappedPathRoot)
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{
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if (mappedPathRoot == null)
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{
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return null;
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}
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var sbPathInfo = new StringBuilder();
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var fullPathParts = fullPath.Split('/');
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var mappedPathRootParts = mappedPathRoot.Split('/');
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var fullPathIndexOffset = mappedPathRootParts.Length - 1;
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var pathRootFound = false;
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for (var fullPathIndex = 0; fullPathIndex < fullPathParts.Length; fullPathIndex++)
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{
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if (pathRootFound)
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{
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sbPathInfo.Append("/" + fullPathParts[fullPathIndex]);
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}
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else if (fullPathIndex - fullPathIndexOffset >= 0)
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{
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pathRootFound = true;
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for (var mappedPathRootIndex = 0; mappedPathRootIndex < mappedPathRootParts.Length; mappedPathRootIndex++)
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{
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if (!string.Equals(fullPathParts[fullPathIndex - fullPathIndexOffset + mappedPathRootIndex], mappedPathRootParts[mappedPathRootIndex], StringComparison.OrdinalIgnoreCase))
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{
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pathRootFound = false;
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break;
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}
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}
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}
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}
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if (!pathRootFound)
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{
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return null;
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}
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var path = sbPathInfo.ToString();
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return path.Length > 1 ? path.TrimEnd('/') : "/";
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}
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public string UserAgent => request.Headers[HeaderNames.UserAgent];
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public IHeaderDictionary Headers => request.Headers;
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public IQueryCollection QueryString => request.Query;
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public bool IsLocal => string.Equals(request.HttpContext.Connection.LocalIpAddress.ToString(), request.HttpContext.Connection.RemoteIpAddress.ToString());
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private string httpMethod;
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public string HttpMethod =>
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httpMethod
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?? (httpMethod = request.Method);
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public string Verb => HttpMethod;
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public string ContentType => request.ContentType;
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private Encoding contentEncoding;
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public Encoding ContentEncoding
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{
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get => contentEncoding ?? Encoding.GetEncoding(request.Headers[HeaderNames.ContentEncoding].ToString());
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set => contentEncoding = value;
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}
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public Uri UrlReferrer => request.GetTypedHeaders().Referer;
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public static Encoding GetEncoding(string contentTypeHeader)
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{
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var param = GetParameter(contentTypeHeader, "charset=");
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if (param == null)
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{
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return null;
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}
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try
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{
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return Encoding.GetEncoding(param);
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}
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catch (ArgumentException)
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{
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return null;
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}
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}
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public Stream InputStream => request.Body;
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public long ContentLength => request.ContentLength ?? 0;
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private IHttpFile[] httpFiles;
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public IHttpFile[] Files
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{
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get
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{
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if (httpFiles == null)
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{
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if (files == null)
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{
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return httpFiles = Array.Empty<IHttpFile>();
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}
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httpFiles = new IHttpFile[files.Count];
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var i = 0;
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foreach (var pair in files)
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{
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var reqFile = pair.Value;
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httpFiles[i] = new HttpFile
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{
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ContentType = reqFile.ContentType,
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ContentLength = reqFile.ContentLength,
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FileName = reqFile.FileName,
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InputStream = reqFile.InputStream,
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};
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i++;
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}
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}
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return httpFiles;
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}
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}
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public static string NormalizePathInfo(string pathInfo, string handlerPath)
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{
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if (handlerPath != null)
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{
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var trimmed = pathInfo.TrimStart('/');
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if (trimmed.StartsWith(handlerPath, StringComparison.OrdinalIgnoreCase))
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{
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return trimmed.Substring(handlerPath.Length);
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}
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}
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return pathInfo;
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}
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}
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}
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