using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
#if !NETFX_CORE || UNITY_EDITOR
using System.Net.Sockets;
#endif
using UnityEngine;
namespace BestHTTP
{
#if !BESTHTTP_DISABLE_CACHING
using BestHTTP.Caching;
#endif
using BestHTTP.Extensions;
#if !BESTHTTP_DISABLE_COOKIES
using BestHTTP.Cookies;
#endif
using System.Threading;
using BestHTTP.Core;
using BestHTTP.PlatformSupport.Memory;
/// <summary>
///
/// </summary>
public class HTTPResponse : IDisposable
{
internal const byte CR = 13;
internal const byte LF = 10;
/// <summary>
/// Minimum size of the read buffer.
/// </summary>
public static int MinReadBufferSize = 16 * 1024;
#region Public Properties
public int VersionMajor { get; protected set; }
public int VersionMinor { get; protected set; }
/// <summary>
/// The status code that sent from the server.
/// </summary>
public int StatusCode { get; protected set; }
/// <summary>
/// Returns true if the status code is in the range of [200..300[ or 304 (Not Modified)
/// </summary>
public bool IsSuccess { get { return (this.StatusCode >= 200 && this.StatusCode < 300) || this.StatusCode == 304; } }
/// <summary>
/// The message that sent along with the StatusCode from the server. You can check it for errors from the server.
/// </summary>
public string Message { get; protected set; }
/// <summary>
/// True if it's a streamed response.
/// </summary>
public bool IsStreamed { get; protected set; }
#if !BESTHTTP_DISABLE_CACHING
/// <summary>
/// Indicates that the response body is read from the cache.
/// </summary>
public bool IsFromCache { get; internal set; }
/// <summary>
/// Provides information about the file used for caching the request.
/// </summary>
public HTTPCacheFileInfo CacheFileInfo { get; internal set; }
/// <summary>
/// Determines if this response is only stored to cache.
/// If both IsCacheOnly and IsStreamed are true, GetStreamedFragments should not be called.
/// </summary>
public bool IsCacheOnly { get; private set; }
#endif
/// <summary>
/// The headers that sent from the server.
/// </summary>
public Dictionary<string, List<string>> Headers { get; protected set; }
/// <summary>
/// The data that downloaded from the server. All Transfer and Content encodings decoded if any(eg. chunked, gzip, deflate).
/// </summary>
public byte[] Data { get; internal set; }
/// <summary>
/// The normal HTTP protocol is upgraded to an other.
/// </summary>
public bool IsUpgraded { get; protected set; }
#if !BESTHTTP_DISABLE_COOKIES
/// <summary>
/// The cookies that the server sent to the client.
/// </summary>
public List<Cookie> Cookies { get; internal set; }
#endif
/// <summary>
/// Cached, converted data.
/// </summary>
protected string dataAsText;
/// <summary>
/// The data converted to an UTF8 string.
/// </summary>
public string DataAsText
{
get
{
if (Data == null)
return string.Empty;
if (!string.IsNullOrEmpty(dataAsText))
return dataAsText;
return dataAsText = Encoding.UTF8.GetString(Data, 0, Data.Length);
}
}
/// <summary>
/// Cached converted data.
/// </summary>
protected Texture2D texture;
/// <summary>
/// The data loaded to a Texture2D.
/// </summary>
public Texture2D DataAsTexture2D
{
get
{
if (Data == null)
return null;
if (texture != null)
return texture;
texture = new Texture2D(0, 0, TextureFormat.ARGB32, false);
texture.LoadImage(Data);
return texture;
}
}
/// <summary>
/// True if the connection's stream will be closed manually. Used in custom protocols (WebSocket, EventSource).
/// </summary>
public bool IsClosedManually { get; protected set; }
/// <summary>
/// Count of streaming data fragments sitting in the HTTPManager's request event queue.
/// </summary>
#if UNITY_EDITOR
[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
#endif
internal long UnprocessedFragments;
#endregion
#region Internal Fields
internal HTTPRequest baseRequest;
#endregion
#region Protected Properties And Fields
protected Stream Stream;
protected byte[] fragmentBuffer;
protected int fragmentBufferDataLength;
#if !BESTHTTP_DISABLE_CACHING
protected Stream cacheStream;
#endif
protected int allFragmentSize;
#endregion
protected HTTPResponse(HTTPRequest request, bool isFromCache)
{
this.baseRequest = request;
#if !BESTHTTP_DISABLE_CACHING
this.IsFromCache = isFromCache;
#endif
}
public HTTPResponse(HTTPRequest request, Stream stream, bool isStreamed, bool isFromCache)
{
this.baseRequest = request;
this.Stream = /*new ReadOnlyBufferedStream*/(stream);
this.IsStreamed = isStreamed;
#if !BESTHTTP_DISABLE_CACHING
this.IsFromCache = isFromCache;
this.IsCacheOnly = request.CacheOnly;
#endif
this.IsClosedManually = false;
}
public virtual bool Receive(int forceReadRawContentLength = -1, bool readPayloadData = true, bool sendUpgradedEvent = true)
{
if (this.baseRequest.IsCancellationRequested)
return false;
string statusLine = string.Empty;
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("Receive. forceReadRawContentLength: '{0:N0}', readPayloadData: '{1:N0}'", forceReadRawContentLength, readPayloadData));
// On WP platform we aren't able to determined sure enough whether the tcp connection is closed or not.
// So if we get an exception here, we need to recreate the connection.
try
{
// Read out 'HTTP/1.1' from the "HTTP/1.1 {StatusCode} {Message}"
statusLine = ReadTo(Stream, (byte)' ');
}
catch
{
if (baseRequest.Retries >= baseRequest.MaxRetries)
{
HTTPManager.Logger.Warning("HTTPResponse", string.Format("{0} - Failed to read Status Line! Retry is enabled, returning with false.", this.baseRequest.CurrentUri.ToString()));
return false;
}
HTTPManager.Logger.Warning("HTTPResponse", string.Format("{0} - Failed to read Status Line! Retry is disabled, re-throwing exception.", this.baseRequest.CurrentUri.ToString()));
throw;
}
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("Status Line: '{0}'", statusLine));
if (string.IsNullOrEmpty(statusLine))
{
if (baseRequest.Retries >= baseRequest.MaxRetries)
return false;
throw new Exception("Remote server closed the connection before sending response header!");
}
string[] versions = statusLine.Split(new char[] { '/', '.' });
this.VersionMajor = int.Parse(versions[1]);
this.VersionMinor = int.Parse(versions[2]);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("HTTP Version: '{0}.{1}'", this.VersionMajor.ToString(), this.VersionMinor.ToString()));
int statusCode;
string statusCodeStr = NoTrimReadTo(Stream, (byte)' ', LF);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("Status Code: '{0}'", statusCodeStr));
if (baseRequest.Retries >= baseRequest.MaxRetries)
statusCode = int.Parse(statusCodeStr);
else if (!int.TryParse(statusCodeStr, out statusCode))
return false;
this.StatusCode = statusCode;
if (statusCodeStr.Length > 0 && (byte)statusCodeStr[statusCodeStr.Length - 1] != LF && (byte)statusCodeStr[statusCodeStr.Length - 1] != CR)
{
this.Message = ReadTo(Stream, LF);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("Status Message: '{0}'", this.Message));
}
else
{
HTTPManager.Logger.Warning("HTTPResponse", string.Format("{0} - Skipping Status Message reading!", this.baseRequest.CurrentUri.ToString()));
this.Message = string.Empty;
}
//Read Headers
ReadHeaders(Stream);
IsUpgraded = StatusCode == 101 && (HasHeaderWithValue("connection", "upgrade") || HasHeader("upgrade"));
if (IsUpgraded)
{
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging("Request Upgraded!");
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.Upgraded));
}
if (!readPayloadData)
return true;
return ReadPayload(forceReadRawContentLength);
}
protected bool ReadPayload(int forceReadRawContentLength)
{
// Reading from an already unpacked stream (eq. From a file cache or all responses under webgl)
if (forceReadRawContentLength != -1)
{
ReadRaw(Stream, forceReadRawContentLength);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging("ReadPayload Finished!");
return true;
}
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.4
// 1.Any response message which "MUST NOT" include a message-body (such as the 1xx, 204, and 304 responses and any response to a HEAD request)
// is always terminated by the first empty line after the header fields, regardless of the entity-header fields present in the message.
if ((StatusCode >= 100 && StatusCode < 200) || StatusCode == 204 || StatusCode == 304 || baseRequest.MethodType == HTTPMethods.Head)
return true;
#if (!UNITY_WEBGL || UNITY_EDITOR)
if (HasHeaderWithValue("transfer-encoding", "chunked"))
ReadChunked(Stream);
else
#endif
{
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.4
// Case 3 in the above link.
List<string> contentLengthHeaders = GetHeaderValues("content-length");
var contentRangeHeaders = GetHeaderValues("content-range");
if (contentLengthHeaders != null && contentRangeHeaders == null)
ReadRaw(Stream, long.Parse(contentLengthHeaders[0]));
else if (contentRangeHeaders != null)
{
if (contentLengthHeaders != null)
ReadRaw(Stream, long.Parse(contentLengthHeaders[0]));
else
{
HTTPRange range = GetRange();
ReadRaw(Stream, (range.LastBytePos - range.FirstBytePos) + 1);
}
}
else
ReadUnknownSize(Stream);
}
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging("ReadPayload Finished!");
return true;
}
#region Header Management
protected void ReadHeaders(Stream stream)
{
string headerName = ReadTo(stream, (byte)':', LF)/*.Trim()*/;
while (headerName != string.Empty)
{
string value = ReadTo(stream, LF);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("Header - '{0}': '{1}'", headerName, value));
AddHeader(headerName, value);
headerName = ReadTo(stream, (byte)':', LF);
}
if (this.baseRequest.OnHeadersReceived != null)
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.Headers));
}
public void AddHeader(string name, string value)
{
name = name.ToLower();
if (Headers == null)
Headers = new Dictionary<string, List<string>>();
List<string> values;
if (!Headers.TryGetValue(name, out values))
Headers.Add(name, values = new List<string>(1));
values.Add(value);
if (name.Equals("alt-svc", StringComparison.Ordinal))
PluginEventHelper.EnqueuePluginEvent(new PluginEventInfo(PluginEvents.AltSvcHeader, new AltSvcEventInfo(this.baseRequest.CurrentUri.Host, this)));
}
/// <summary>
/// Returns the list of values that received from the server for the given header name.
/// <remarks>Remarks: All headers converted to lowercase while reading the response.</remarks>
/// </summary>
/// <param name="name">Name of the header</param>
/// <returns>If no header found with the given name or there are no values in the list (eg. Count == 0) returns null.</returns>
public List<string> GetHeaderValues(string name)
{
if (Headers == null)
return null;
name = name.ToLower();
List<string> values;
if (!Headers.TryGetValue(name, out values) || values.Count == 0)
return null;
return values;
}
/// <summary>
/// Returns the first value in the header list or null if there are no header or value.
/// </summary>
/// <param name="name">Name of the header</param>
/// <returns>If no header found with the given name or there are no values in the list (eg. Count == 0) returns null.</returns>
public string GetFirstHeaderValue(string name)
{
if (Headers == null)
return null;
name = name.ToLower();
List<string> values;
if (!Headers.TryGetValue(name, out values) || values.Count == 0)
return null;
return values[0];
}
/// <summary>
/// Checks if there is a header with the given name and value.
/// </summary>
/// <param name="headerName">Name of the header.</param>
/// <param name="value"></param>
/// <returns>Returns true if there is a header with the given name and value.</returns>
public bool HasHeaderWithValue(string headerName, string value)
{
var values = GetHeaderValues(headerName);
if (values == null)
return false;
for (int i = 0; i < values.Count; ++i)
if (string.Compare(values[i], value, StringComparison.OrdinalIgnoreCase) == 0)
return true;
return false;
}
/// <summary>
/// Checks if there is a header with the given name.
/// </summary>
/// <param name="headerName">Name of the header.</param>
/// <returns>Returns true if there is a header with the given name.</returns>
public bool HasHeader(string headerName)
{
var values = GetHeaderValues(headerName);
if (values == null)
return false;
return true;
}
/// <summary>
/// Parses the 'Content-Range' header's value and returns a HTTPRange object.
/// </summary>
/// <remarks>If the server ignores a byte-range-spec because it is syntactically invalid, the server SHOULD treat the request as if the invalid Range header field did not exist.
/// (Normally, this means return a 200 response containing the full entity). In this case because of there are no 'Content-Range' header, this function will return null!</remarks>
/// <returns>Returns null if no 'Content-Range' header found.</returns>
public HTTPRange GetRange()
{
var rangeHeaders = GetHeaderValues("content-range");
if (rangeHeaders == null)
return null;
// A byte-content-range-spec with a byte-range-resp-spec whose last- byte-pos value is less than its first-byte-pos value,
// or whose instance-length value is less than or equal to its last-byte-pos value, is invalid.
// The recipient of an invalid byte-content-range- spec MUST ignore it and any content transferred along with it.
// A valid content-range sample: "bytes 500-1233/1234"
var ranges = rangeHeaders[0].Split(new char[] { ' ', '-', '/' }, StringSplitOptions.RemoveEmptyEntries);
// A server sending a response with status code 416 (Requested range not satisfiable) SHOULD include a Content-Range field with a byte-range-resp-spec of "*".
// The instance-length specifies the current length of the selected resource.
// "bytes */1234"
if (ranges[1] == "*")
return new HTTPRange(int.Parse(ranges[2]));
return new HTTPRange(int.Parse(ranges[1]), int.Parse(ranges[2]), ranges[3] != "*" ? int.Parse(ranges[3]) : -1);
}
#endregion
#region Static Stream Management Helper Functions
internal static string ReadTo(Stream stream, byte blocker)
{
byte[] readBuf = BufferPool.Get(1024, true);
try
{
int bufpos = 0;
int ch = stream.ReadByte();
while (ch != blocker && ch != -1)
{
if (ch > 0x7f) //replaces asciitostring
ch = '?';
//make buffer larger if too short
if (readBuf.Length <= bufpos)
BufferPool.Resize(ref readBuf, readBuf.Length * 2, true);
if (bufpos > 0 || !char.IsWhiteSpace((char)ch)) //trimstart
readBuf[bufpos++] = (byte)ch;
ch = stream.ReadByte();
}
while (bufpos > 0 && char.IsWhiteSpace((char)readBuf[bufpos - 1]))
bufpos--;
return System.Text.Encoding.UTF8.GetString(readBuf, 0, bufpos);
}
finally
{
BufferPool.Release(readBuf);
}
}
internal static string ReadTo(Stream stream, byte blocker1, byte blocker2)
{
byte[] readBuf = BufferPool.Get(1024, true);
try {
int bufpos = 0;
int ch = stream.ReadByte();
while (ch != blocker1 && ch != blocker2 && ch != -1)
{
if (ch > 0x7f) //replaces asciitostring
ch = '?';
//make buffer larger if too short
if (readBuf.Length <= bufpos)
BufferPool.Resize(ref readBuf, readBuf.Length * 2, true);
if (bufpos > 0 || !char.IsWhiteSpace((char)ch)) //trimstart
readBuf[bufpos++] = (byte)ch;
ch = stream.ReadByte();
}
while (bufpos > 0 && char.IsWhiteSpace((char)readBuf[bufpos - 1]))
bufpos--;
return System.Text.Encoding.UTF8.GetString(readBuf, 0, bufpos);
}
finally
{
BufferPool.Release(readBuf);
}
}
internal static string NoTrimReadTo(Stream stream, byte blocker1, byte blocker2)
{
byte[] readBuf = BufferPool.Get(1024, true);
try {
int bufpos = 0;
int ch = stream.ReadByte();
while (ch != blocker1 && ch != blocker2 && ch != -1)
{
if (ch > 0x7f) //replaces asciitostring
ch = '?';
//make buffer larger if too short
if (readBuf.Length <= bufpos)
BufferPool.Resize(ref readBuf, readBuf.Length * 2, true);
if (bufpos > 0 || !char.IsWhiteSpace((char)ch)) //trimstart
readBuf[bufpos++] = (byte)ch;
ch = stream.ReadByte();
}
return System.Text.Encoding.UTF8.GetString(readBuf, 0, bufpos);
}
finally
{
BufferPool.Release(readBuf);
}
}
#endregion
#region Read Chunked Body
protected int ReadChunkLength(Stream stream)
{
// Read until the end of line, then split the string so we will discard any optional chunk extensions
string line = ReadTo(stream, LF);
string[] splits = line.Split(';');
string num = splits[0];
int result;
if (int.TryParse(num, System.Globalization.NumberStyles.AllowHexSpecifier, null, out result))
return result;
throw new Exception(string.Format("Can't parse '{0}' as a hex number!", num));
}
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6.1
protected void ReadChunked(Stream stream)
{
BeginReceiveStreamFragments();
string contentLengthHeader = GetFirstHeaderValue("Content-Length");
bool hasContentLengthHeader = !string.IsNullOrEmpty(contentLengthHeader);
int realLength = 0;
if (hasContentLengthHeader)
hasContentLengthHeader = int.TryParse(contentLengthHeader, out realLength);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("ReadChunked - hasContentLengthHeader: {0}, contentLengthHeader: {1} realLength: {2:N0}", hasContentLengthHeader.ToString(), contentLengthHeader, realLength));
using (var output = new BufferPoolMemoryStream())
{
int chunkLength = ReadChunkLength(stream);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("chunkLength: {0:N0}", chunkLength));
byte[] buffer = BufferPool.Get(MinReadBufferSize, true);
// Progress report:
long Downloaded = 0;
long DownloadLength = hasContentLengthHeader ? realLength : chunkLength;
bool sendProgressChanged = this.baseRequest.OnDownloadProgress != null && (this.IsSuccess
#if !BESTHTTP_DISABLE_CACHING
|| this.IsFromCache
#endif
);
if (sendProgressChanged)
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.DownloadProgress, Downloaded, DownloadLength));
string encoding =
#if !BESTHTTP_DISABLE_CACHING
IsFromCache ? null :
#endif
GetFirstHeaderValue("content-encoding");
bool gzipped = !string.IsNullOrEmpty(encoding) && encoding == "gzip";
Decompression.GZipDecompressor decompressor = gzipped ? new Decompression.GZipDecompressor(256) : null;
while (chunkLength != 0)
{
if (this.baseRequest.IsCancellationRequested)
return;
int totalBytes = 0;
// Fill up the buffer
do
{
int tryToReadCount = (int)Math.Min(chunkLength - totalBytes, buffer.Length);
int bytes = stream.Read(buffer, 0, tryToReadCount);
if (bytes <= 0)
throw ExceptionHelper.ServerClosedTCPStream();
// Progress report:
// Placing reporting inside this cycle will report progress much more frequent
Downloaded += bytes;
if (sendProgressChanged)
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.DownloadProgress, Downloaded, DownloadLength));
if (baseRequest.UseStreaming)
{
if (gzipped)
{
var decompressed = decompressor.Decompress(buffer, 0, bytes, false, true);
if (decompressed.Data != null)
FeedStreamFragment(decompressed.Data, 0, decompressed.Length);
}
else
FeedStreamFragment(buffer, 0, bytes);
}
else
output.Write(buffer, 0, bytes);
totalBytes += bytes;
} while (totalBytes < chunkLength);
// Every chunk data has a trailing CRLF
ReadTo(stream, LF);
// read the next chunk's length
chunkLength = ReadChunkLength(stream);
if (!hasContentLengthHeader)
DownloadLength += chunkLength;
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("chunkLength: {0:N0}", chunkLength));
}
BufferPool.Release(buffer);
if (baseRequest.UseStreaming)
{
if (gzipped)
{
var decompressed = decompressor.Decompress(null, 0, 0, true, true);
if (decompressed.Data != null)
FeedStreamFragment(decompressed.Data, 0, decompressed.Length);
}
FlushRemainingFragmentBuffer();
}
// Read the trailing headers or the CRLF
ReadHeaders(stream);
// HTTP servers sometimes use compression (gzip) or deflate methods to optimize transmission.
// How both chunked and gzip encoding interact is dictated by the two-staged encoding of HTTP:
// first the content stream is encoded as (Content-Encoding: gzip), after which the resulting byte stream is encoded for transfer using another encoder (Transfer-Encoding: chunked).
// This means that in case both compression and chunked encoding are enabled, the chunk encoding itself is not compressed, and the data in each chunk should not be compressed individually.
// The remote endpoint can decode the incoming stream by first decoding it with the Transfer-Encoding, followed by the specified Content-Encoding.
// It would be a better implementation when the chunk would be decododed on-the-fly. Becouse now the whole stream must be downloaded, and then decoded. It needs more memory.
if (!baseRequest.UseStreaming)
this.Data = DecodeStream(output);
if (decompressor != null)
decompressor.Dispose();
}
}
#endregion
#region Read Raw Body
// No transfer-encoding just raw bytes.
internal void ReadRaw(Stream stream, long contentLength)
{
BeginReceiveStreamFragments();
// Progress report:
long downloaded = 0;
long downloadLength = contentLength;
bool sendProgressChanged = this.baseRequest.OnDownloadProgress != null && (this.IsSuccess
#if !BESTHTTP_DISABLE_CACHING
|| this.IsFromCache
#endif
);
if (sendProgressChanged)
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.DownloadProgress, downloaded, downloadLength));
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("ReadRaw - contentLength: {0:N0}", contentLength));
string encoding =
#if !BESTHTTP_DISABLE_CACHING
IsFromCache ? null :
#endif
GetFirstHeaderValue("content-encoding");
bool gzipped = !string.IsNullOrEmpty(encoding) && encoding == "gzip";
Decompression.GZipDecompressor decompressor = gzipped ? new Decompression.GZipDecompressor(256) : null;
if (!baseRequest.UseStreaming && contentLength > 2147483646)
{
throw new OverflowException("You have to use STREAMING to download files bigger than 2GB!");
}
using (var output = new BufferPoolMemoryStream(baseRequest.UseStreaming ? 0 : (int)contentLength))
{
// Because of the last parameter, buffer's size can be larger than the requested but there's no reason to use
// an exact sized one if there's an larger one available in the pool. Later we will use the whole buffer.
byte[] buffer = BufferPool.Get(MinReadBufferSize, true);
int readBytes = 0;
while (contentLength > 0)
{
if (this.baseRequest.IsCancellationRequested)
return;
readBytes = 0;
do
{
// tryToReadCount contain how much bytes we want to read in once. We try to read the buffer fully in once,
// but with a limit of the remaining contentLength.
int tryToReadCount = (int)Math.Min(Math.Min(int.MaxValue, contentLength), buffer.Length - readBytes);
int bytes = stream.Read(buffer, readBytes, tryToReadCount);
if (bytes <= 0)
throw ExceptionHelper.ServerClosedTCPStream();
readBytes += bytes;
contentLength -= bytes;
// Progress report:
if (sendProgressChanged)
{
downloaded += bytes;
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.DownloadProgress, downloaded, downloadLength));
}
} while (readBytes < buffer.Length && contentLength > 0);
if (baseRequest.UseStreaming)
{
if (gzipped)
{
var decompressed = decompressor.Decompress(buffer, 0, readBytes, false, true);
if (decompressed.Data != null)
FeedStreamFragment(decompressed.Data, 0, decompressed.Length);
}
else
FeedStreamFragment(buffer, 0, readBytes);
}
else
output.Write(buffer, 0, readBytes);
};
BufferPool.Release(buffer);
if (baseRequest.UseStreaming)
{
if (gzipped)
{
var decompressed = decompressor.Decompress(null, 0, 0, true, true);
if (decompressed.Data != null)
FeedStreamFragment(decompressed.Data, 0, decompressed.Length);
}
FlushRemainingFragmentBuffer();
}
if (!baseRequest.UseStreaming)
this.Data = DecodeStream(output);
}
if (decompressor != null)
decompressor.Dispose();
}
#endregion
#region Read Unknown Size
protected void ReadUnknownSize(Stream stream)
{
// Progress report:
long Downloaded = 0;
long DownloadLength = 0;
bool sendProgressChanged = this.baseRequest.OnDownloadProgress != null && (this.IsSuccess
#if !BESTHTTP_DISABLE_CACHING
|| this.IsFromCache
#endif
);
if (sendProgressChanged)
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.DownloadProgress, Downloaded, DownloadLength));
string encoding =
#if !BESTHTTP_DISABLE_CACHING
IsFromCache ? null :
#endif
GetFirstHeaderValue("content-encoding");
bool gzipped = !string.IsNullOrEmpty(encoding) && encoding == "gzip";
Decompression.GZipDecompressor decompressor = gzipped ? new Decompression.GZipDecompressor(256) : null;
using (var output = new BufferPoolMemoryStream())
{
byte[] buffer = BufferPool.Get(MinReadBufferSize, true);
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("ReadUnknownSize - buffer size: {0:N0}", buffer.Length));
int readBytes = 0;
int bytes = 0;
do
{
readBytes = 0;
do
{
if (this.baseRequest.IsCancellationRequested)
return;
bytes = 0;
#if !NETFX_CORE || UNITY_EDITOR
NetworkStream networkStream = stream as NetworkStream;
// If we have the good-old NetworkStream, than we can use the DataAvailable property. On WP8 platforms, these are omitted... :/
if (networkStream != null && baseRequest.EnableSafeReadOnUnknownContentLength)
{
for (int i = readBytes; i < buffer.Length && networkStream.DataAvailable; ++i)
{
int read = stream.ReadByte();
if (read >= 0)
{
buffer[i] = (byte)read;
bytes++;
}
else
break;
}
}
else // This will be good anyway, but a little slower.
#endif
{
bytes = stream.Read(buffer, readBytes, buffer.Length - readBytes);
}
readBytes += bytes;
// Progress report:
Downloaded += bytes;
DownloadLength = Downloaded;
if (sendProgressChanged)
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, RequestEvents.DownloadProgress, Downloaded, DownloadLength));
} while (readBytes < buffer.Length && bytes > 0);
if (baseRequest.UseStreaming)
{
if (gzipped)
{
var decompressed = decompressor.Decompress(buffer, 0, readBytes, false, true);
if (decompressed.Data != null)
FeedStreamFragment(decompressed.Data, 0, decompressed.Length);
}
else
FeedStreamFragment(buffer, 0, readBytes);
}
else
output.Write(buffer, 0, readBytes);
} while (bytes > 0);
BufferPool.Release(buffer);
if (baseRequest.UseStreaming)
{
if (gzipped)
{
var decompressed = decompressor.Decompress(null, 0, 0, true, true);
if (decompressed.Data != null)
FeedStreamFragment(decompressed.Data, 0, decompressed.Length);
}
FlushRemainingFragmentBuffer();
}
if (!baseRequest.UseStreaming)
this.Data = DecodeStream(output);
}
if (decompressor != null)
decompressor.Dispose();
}
#endregion
#region Stream Decoding
protected byte[] DecodeStream(BufferPoolMemoryStream streamToDecode)
{
streamToDecode.Seek(0, SeekOrigin.Begin);
// The cache stores the decoded data
var encoding =
#if !BESTHTTP_DISABLE_CACHING
IsFromCache ? null :
#endif
GetHeaderValues("content-encoding");
#if !UNITY_WEBGL || UNITY_EDITOR
Stream decoderStream = null;
#endif
// Return early if there are no encoding used.
if (encoding == null)
return streamToDecode.ToArray();
else
{
switch (encoding[0])
{
#if !UNITY_WEBGL || UNITY_EDITOR
case "gzip": decoderStream = new Decompression.Zlib.GZipStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
case "deflate": decoderStream = new Decompression.Zlib.DeflateStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
#endif
//identity, utf-8, etc.
default:
// Do not copy from one stream to an other, just return with the raw bytes
return streamToDecode.ToArray();
}
}
#if !UNITY_WEBGL || UNITY_EDITOR
using (var ms = new BufferPoolMemoryStream((int)streamToDecode.Length))
{
var buf = BufferPool.Get(1024, true);
int byteCount = 0;
while ((byteCount = decoderStream.Read(buf, 0, buf.Length)) > 0)
ms.Write(buf, 0, byteCount);
BufferPool.Release(buf);
decoderStream.Dispose();
return ms.ToArray();
}
#endif
}
#endregion
#region Streaming Fragments Support
protected void BeginReceiveStreamFragments()
{
#if !BESTHTTP_DISABLE_CACHING
if (!baseRequest.DisableCache && baseRequest.UseStreaming)
{
// If caching is enabled and the response not from cache and it's cacheble we will cache the downloaded data.
if (!IsFromCache && HTTPCacheService.IsCacheble(baseRequest.CurrentUri, baseRequest.MethodType, this))
cacheStream = HTTPCacheService.PrepareStreamed(baseRequest.CurrentUri, this);
}
#endif
allFragmentSize = 0;
}
/// <summary>
/// Add data to the fragments list.
/// </summary>
/// <param name="buffer">The buffer to be added.</param>
/// <param name="pos">The position where we start copy the data.</param>
/// <param name="length">How many data we want to copy.</param>
protected void FeedStreamFragment(byte[] buffer, int pos, int length)
{
if (buffer == null || length == 0)
return;
// If reading from cache, we don't want to read too much data to memory. So we will wait until the loaded fragment processed.
#if !UNITY_WEBGL || UNITY_EDITOR
#if CSHARP_7_3_OR_NEWER
SpinWait spinWait = new SpinWait();
#endif
while (!this.baseRequest.IsCancellationRequested &&
this.baseRequest.State == HTTPRequestStates.Processing &&
baseRequest.UseStreaming &&
FragmentQueueIsFull())
{
VerboseLogging("WaitWhileFragmentQueueIsFull");
#if CSHARP_7_3_OR_NEWER
spinWait.SpinOnce();
#elif !NETFX_CORE
System.Threading.Thread.Sleep(10);
#endif
}
#endif
if (fragmentBuffer == null)
{
fragmentBuffer = BufferPool.Get(baseRequest.StreamFragmentSize, true);
fragmentBufferDataLength = 0;
}
if (fragmentBufferDataLength + length <= /*baseRequest.StreamFragmentSize*/fragmentBuffer.Length)
{
Array.Copy(buffer, pos, fragmentBuffer, fragmentBufferDataLength, length);
fragmentBufferDataLength += length;
if (fragmentBufferDataLength == baseRequest.StreamFragmentSize || baseRequest.StreamChunksImmediately)
{
AddStreamedFragment(fragmentBuffer, fragmentBufferDataLength);
fragmentBuffer = null;
fragmentBufferDataLength = 0;
}
}
else
{
int remaining = /*baseRequest.StreamFragmentSize*/ fragmentBuffer.Length - fragmentBufferDataLength;
FeedStreamFragment(buffer, pos, remaining);
FeedStreamFragment(buffer, pos + remaining, length - remaining);
}
}
protected void FlushRemainingFragmentBuffer()
{
if (fragmentBuffer != null)
{
//VariableSizedBufferPool.Resize(ref fragmentBuffer, fragmentBufferDataLength, false);
AddStreamedFragment(fragmentBuffer, fragmentBufferDataLength);
fragmentBuffer = null;
fragmentBufferDataLength = 0;
}
#if !BESTHTTP_DISABLE_CACHING
if (cacheStream != null)
{
cacheStream.Dispose();
cacheStream = null;
HTTPCacheService.SetBodyLength(baseRequest.CurrentUri, allFragmentSize);
}
#endif
}
#if NET_STANDARD_2_0 || NETFX_CORE
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
#endif
protected void AddStreamedFragment(byte[] buffer, int bufferLength)
{
#if !BESTHTTP_DISABLE_CACHING
if (!IsCacheOnly)
#endif
{
if (this.baseRequest.OnStreamingData != null && buffer != null && bufferLength > 0)
{
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(this.baseRequest, buffer, bufferLength));
Interlocked.Increment(ref this.UnprocessedFragments);
}
}
if (HTTPManager.Logger.Level == Logger.Loglevels.All && buffer != null)
VerboseLogging(string.Format("AddStreamedFragment buffer length: {0:N0} UnprocessedFragments: {1:N0}", bufferLength, Interlocked.Read(ref this.UnprocessedFragments)));
#if !BESTHTTP_DISABLE_CACHING
if (cacheStream != null)
{
cacheStream.Write(buffer, 0, bufferLength);
allFragmentSize += bufferLength;
}
#endif
}
#if NET_STANDARD_2_0 || NETFX_CORE
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
#endif
private bool FragmentQueueIsFull()
{
#if !UNITY_WEBGL || UNITY_EDITOR
long unprocessedFragments = Interlocked.Read(ref UnprocessedFragments);
bool result = unprocessedFragments >= baseRequest.MaxFragmentQueueLength;
if (result && HTTPManager.Logger.Level == Logger.Loglevels.All)
VerboseLogging(string.Format("FragmentQueueIsFull - {0} / {1}", unprocessedFragments, baseRequest.MaxFragmentQueueLength));
return result;
#else
return false;
#endif
}
#endregion
void VerboseLogging(string str)
{
if (HTTPManager.Logger.Level == Logger.Loglevels.All)
HTTPManager.Logger.Verbose("HTTPResponse", "'" + this.baseRequest.CurrentUri.ToString() + "' - " + str);
}
/// <summary>
/// IDisposable implementation.
/// </summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
~HTTPResponse()
{
Dispose(false);
}
protected virtual void Dispose(bool disposing)
{
// Release resources in case we are using ReadOnlyBufferedStream, it will not close its inner stream.
// Otherwise, closing the (inner) Stream is the connection's responsibility
if (Stream != null && Stream is ReadOnlyBufferedStream)
(Stream as IDisposable).Dispose();
Stream = null;
#if !BESTHTTP_DISABLE_CACHING
if (cacheStream != null)
{
cacheStream.Dispose();
cacheStream = null;
}
#endif
if (this.baseRequest != null && this.baseRequest.Callback != null)
{
BufferPool.Release(this.Data);
this.Data = null;
}
}
}
}
