/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#define OF_HTTP_SERVER_M
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#import "OFHTTPServer.h"
#import "OFArray.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFDictionary.h"
#import "OFHTTPRequest.h"
#import "OFHTTPResponse.h"
#import "OFIRI.h"
#import "OFNumber.h"
#import "OFSocket+Private.h"
#import "OFTCPSocket.h"
#import "OFThread.h"
#import "OFTimer.h"
#import "OFAlreadyOpenException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFNotOpenException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "OFTruncatedDataException.h"
#import "OFUnsupportedProtocolException.h"
#import "OFWriteFailedException.h"
/*
* FIXME: Key normalization replaces headers like "DNT" with "Dnt".
* FIXME: Errors are not reported to the user.
*/
@interface OFHTTPServer () <OFTCPSocketDelegate>
@end
OF_DIRECT_MEMBERS
@interface OFHTTPServerResponse: OFHTTPResponse <OFReadyForWritingObserving>
{
OFStreamSocket *_socket;
OFHTTPServer *_server;
OFHTTPRequest *_request;
bool _chunked, _headersSent;
}
- (instancetype)initWithSocket: (OFStreamSocket *)sock
server: (OFHTTPServer *)server
request: (OFHTTPRequest *)request;
@end
OF_DIRECT_MEMBERS
@interface OFHTTPServerConnection: OFObject <OFTCPSocketDelegate>
{
@public
OFStreamSocket *_socket;
OFHTTPServer *_server;
OFTimer *_timer;
enum {
stateAwaitingProlog,
stateParsingHeaders,
stateSendResponse
} _state;
uint8_t _HTTPMinorVersion;
OFHTTPRequestMethod _method;
OFString *_host, *_path;
uint16_t _port;
OFMutableDictionary *_headers;
size_t _contentLength;
OFStream *_requestBody;
}
- (instancetype)initWithSocket: (OFStreamSocket *)sock
server: (OFHTTPServer *)server;
- (bool)parseProlog: (OFString *)line;
- (bool)parseHeaders: (OFString *)line;
- (bool)sendErrorAndClose: (short)statusCode;
- (void)createResponse;
@end
OF_DIRECT_MEMBERS
@interface OFHTTPServerRequestBodyStream: OFStream <OFReadyForReadingObserving>
{
OFStreamSocket *_socket;
bool _chunked;
long long _toRead;
bool _atEndOfStream, _setAtEndOfStream;
}
- (instancetype)initWithSocket: (OFStreamSocket *)sock
chunked: (bool)chunked
contentLength: (unsigned long long)contentLength;
@end
#ifdef OF_HAVE_THREADS
OF_DIRECT_MEMBERS
@interface OFHTTPServerThread: OFThread
- (void)stop;
@end
#endif
static OFString *
normalizedKey(OFString *key)
{
char *cString = OFStrDup(key.UTF8String);
unsigned char *tmp = (unsigned char *)cString;
bool firstLetter = true;
OFString *ret;
while (*tmp != '\0') {
if (!OFASCIIIsAlpha(*tmp)) {
firstLetter = true;
tmp++;
continue;
}
*tmp = (firstLetter
? OFASCIIToUpper(*tmp) : OFASCIIToLower(*tmp));
firstLetter = false;
tmp++;
}
@try {
ret = [OFString stringWithUTF8StringNoCopy: cString
freeWhenDone: true];
} @catch (id e) {
OFFreeMemory(cString);
@throw e;
}
return ret;
}
@implementation OFHTTPServerResponse
- (instancetype)initWithSocket: (OFStreamSocket *)sock
server: (OFHTTPServer *)server
request: (OFHTTPRequest *)request
{
self = [super init];
_statusCode = 500;
_socket = [sock retain];
_server = [server retain];
_request = [request retain];
return self;
}
- (void)dealloc
{
if (_socket != nil)
[self close];
[_server release];
[_request release];
[super dealloc];
}
- (void)of_sendHeaders
{
void *pool = objc_autoreleasePoolPush();
OFMutableDictionary OF_GENERIC(OFString *, OFString *) *headers;
OFEnumerator *keyEnumerator, *valueEnumerator;
OFString *key, *value;
[_socket writeFormat: @"HTTP/%@ %hd %@\r\n",
self.protocolVersionString, _statusCode,
OFHTTPStatusCodeString(_statusCode)];
headers = [[_headers mutableCopy] autorelease];
if ([headers objectForKey: @"Date"] == nil) {
OFString *date = [[OFDate date]
dateStringWithFormat: @"%a, %d %b %Y %H:%M:%S GMT"];
[headers setObject: date forKey: @"Date"];
}
if ([headers objectForKey: @"Server"] == nil) {
OFString *name = _server.name;
if (name != nil)
[headers setObject: name forKey: @"Server"];
}
keyEnumerator = [headers keyEnumerator];
valueEnumerator = [headers objectEnumerator];
while ((key = [keyEnumerator nextObject]) != nil &&
(value = [valueEnumerator nextObject]) != nil)
[_socket writeFormat: @"%@: %@\r\n", key, value];
[_socket writeString: @"\r\n"];
_headersSent = true;
_chunked = [[headers objectForKey: @"Transfer-Encoding"]
isEqual: @"chunked"];
objc_autoreleasePoolPop(pool);
}
- (size_t)lowlevelWriteBuffer: (const void *)buffer length: (size_t)length
{
/* TODO: Use non-blocking writes */
void *pool;
if (_socket == nil)
@throw [OFNotOpenException exceptionWithObject: self];
if (!_headersSent)
[self of_sendHeaders];
if (!_chunked) {
@try {
[_socket writeBuffer: buffer length: length];
} @catch (OFWriteFailedException *e) {
if (e.errNo == EWOULDBLOCK || e.errNo == EAGAIN)
return e.bytesWritten;
@throw e;
}
return length;
}
pool = objc_autoreleasePoolPush();
[_socket writeString: [OFString stringWithFormat: @"%zX\r\n", length]];
objc_autoreleasePoolPop(pool);
[_socket writeBuffer: buffer length: length];
[_socket writeString: @"\r\n"];
return length;
}
- (void)close
{
if (_socket == nil)
@throw [OFNotOpenException exceptionWithObject: self];
@try {
if (!_headersSent)
[self of_sendHeaders];
if (_chunked)
[_socket writeString: @"0\r\n\r\n"];
} @catch (OFWriteFailedException *e) {
id <OFHTTPServerDelegate> delegate = _server.delegate;
if ([delegate respondsToSelector: @selector(server:
didReceiveExceptionForResponse:request:exception:)])
[delegate server: _server
didReceiveExceptionForResponse: self
request: _request
exception: e];
}
[_socket release];
_socket = nil;
[super close];
}
- (int)fileDescriptorForWriting
{
if (_socket == nil)
return -1;
return _socket.fileDescriptorForWriting;
}
@end
@implementation OFHTTPServerConnection
- (instancetype)initWithSocket: (OFStreamSocket *)sock
server: (OFHTTPServer *)server
{
self = [super init];
@try {
_socket = [sock retain];
_server = [server retain];
_timer = [[OFTimer
scheduledTimerWithTimeInterval: 10
target: _socket
selector: @selector(
cancelAsyncRequests)
repeats: false] retain];
_state = stateAwaitingProlog;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_socket release];
[_server release];
[_timer invalidate];
[_timer release];
[_host release];
[_path release];
[_headers release];
[_requestBody release];
[super dealloc];
}
- (bool)stream: (OFStream *)sock
didReadLine: (OFString *)line
exception: (id)exception
{
if (line == nil || exception != nil)
return false;
@try {
switch (_state) {
case stateAwaitingProlog:
return [self parseProlog: line];
case stateParsingHeaders:
return [self parseHeaders: line];
default:
return false;
}
} @catch (OFWriteFailedException *e) {
return false;
}
OFEnsure(0);
}
- (bool)parseProlog: (OFString *)line
{
OFString *method;
OFMutableString *path;
size_t pos;
@try {
OFString *version = [line
substringWithRange: OFMakeRange(line.length - 9, 9)];
OFUnichar tmp;
if (![version hasPrefix: @" HTTP/1."])
return [self sendErrorAndClose: 505];
tmp = [version characterAtIndex: 8];
if (tmp < '0' || tmp > '9')
return [self sendErrorAndClose: 400];
_HTTPMinorVersion = (uint8_t)(tmp - '0');
} @catch (OFOutOfRangeException *e) {
return [self sendErrorAndClose: 400];
}
pos = [line rangeOfString: @" "].location;
if (pos == OFNotFound)
return [self sendErrorAndClose: 400];
method = [line substringToIndex: pos];
@try {
_method = OFHTTPRequestMethodParseString(method);
} @catch (OFInvalidArgumentException *e) {
return [self sendErrorAndClose: 405];
}
@try {
OFRange range = OFMakeRange(pos + 1, line.length - pos - 10);
path = [[[line substringWithRange:
range] mutableCopy] autorelease];
} @catch (OFOutOfRangeException *e) {
return [self sendErrorAndClose: 400];
}
[path deleteEnclosingWhitespaces];
[path makeImmutable];
if (![path hasPrefix: @"/"])
return [self sendErrorAndClose: 400];
_headers = [[OFMutableDictionary alloc] init];
_path = [path copy];
_state = stateParsingHeaders;
return true;
}
- (bool)parseHeaders: (OFString *)line
{
OFString *key, *value, *old;
size_t pos;
if (line.length == 0) {
bool chunked = [[_headers objectForKey: @"Transfer-Encoding"]
isEqual: @"chunked"];
OFString *contentLengthString =
[_headers objectForKey: @"Content-Length"];
unsigned long long contentLength = 0;
if (contentLengthString != nil) {
if (chunked || contentLengthString.length == 0)
return [self sendErrorAndClose: 400];
@try {
contentLength =
contentLengthString.unsignedLongLongValue;
} @catch (OFInvalidFormatException *e) {
return [self sendErrorAndClose: 400];
}
}
if (chunked || contentLengthString != nil) {
[_requestBody release];
_requestBody = nil;
_requestBody = [[OFHTTPServerRequestBodyStream alloc]
initWithSocket: _socket
chunked: chunked
contentLength: contentLength];
[_timer invalidate];
[_timer release];
_timer = nil;
}
_state = stateSendResponse;
[self createResponse];
return false;
}
pos = [line rangeOfString: @":"].location;
if (pos == OFNotFound)
return [self sendErrorAndClose: 400];
key = [line substringToIndex: pos];
value = [line substringFromIndex: pos + 1];
key = normalizedKey(key.stringByDeletingTrailingWhitespaces);
value = value.stringByDeletingLeadingWhitespaces;
old = [_headers objectForKey: key];
if (old != nil)
value = [old stringByAppendingFormat: @",%@", value];
[_headers setObject: value forKey: key];
if ([key isEqual: @"Host"]) {
pos = [value rangeOfString: @":"
options: OFStringSearchBackwards].location;
if (pos != OFNotFound) {
[_host release];
_host = [[value substringToIndex: pos] retain];
@try {
unsigned long long portTmp =
[value substringFromIndex: pos + 1]
.unsignedLongLongValue;
if (portTmp < 1 || portTmp > UINT16_MAX)
return [self sendErrorAndClose: 400];
_port = (uint16_t)portTmp;
} @catch (OFInvalidFormatException *e) {
return [self sendErrorAndClose: 400];
}
} else {
[_host release];
_host = [value retain];
_port = 80;
}
}
return true;
}
- (bool)sendErrorAndClose: (short)statusCode
{
OFString *date = [[OFDate date]
dateStringWithFormat: @"%a, %d %b %Y %H:%M:%S GMT"];
[_socket writeFormat: @"HTTP/1.1 %hd %@\r\n"
@"Date: %@\r\n"
@"Server: %@\r\n"
@"\r\n",
statusCode, OFHTTPStatusCodeString(statusCode),
date, _server.name];
return false;
}
- (void)createResponse
{
void *pool = objc_autoreleasePoolPush();
OFMutableIRI *IRI;
OFHTTPRequest *request;
OFHTTPServerResponse *response;
size_t pos;
[_timer invalidate];
[_timer release];
_timer = nil;
if (_host == nil || _port == 0) {
if (_HTTPMinorVersion > 0) {
[self sendErrorAndClose: 400];
return;
}
[_host release];
_host = [_server.host copy];
_port = [_server port];
}
IRI = [OFMutableIRI IRIWithScheme: @"http"];
IRI.host = _host;
if (_port != 80)
IRI.port = [OFNumber numberWithUnsignedShort: _port];
@try {
if ((pos = [_path rangeOfString: @"?"].location) !=
OFNotFound) {
OFString *path, *query;
path = [_path substringToIndex: pos];
query = [_path substringFromIndex: pos + 1];
IRI.percentEncodedPath = path;
IRI.percentEncodedQuery = query;
} else
IRI.percentEncodedPath = _path;
} @catch (OFInvalidFormatException *e) {
objc_autoreleasePoolPop(pool);
[self sendErrorAndClose: 400];
return;
}
[IRI makeImmutable];
request = [OFHTTPRequest requestWithIRI: IRI];
request.method = _method;
request.protocolVersion =
(OFHTTPRequestProtocolVersion){ 1, _HTTPMinorVersion };
request.headers = _headers;
request.remoteAddress = _socket.remoteAddress;
response = [[[OFHTTPServerResponse alloc]
initWithSocket: _socket
server: _server
request: request] autorelease];
[_server.delegate server: _server
didReceiveRequest: request
requestBody: _requestBody
response: response];
objc_autoreleasePoolPop(pool);
}
@end
@implementation OFHTTPServerRequestBodyStream
- (instancetype)initWithSocket: (OFStreamSocket *)sock
chunked: (bool)chunked
contentLength: (unsigned long long)contentLength
{
self = [super init];
@try {
if (contentLength > LLONG_MAX)
@throw [OFOutOfRangeException exception];
_socket = [sock retain];
_chunked = chunked;
_toRead = (long long)contentLength;
if (_chunked && _toRead > 0)
@throw [OFInvalidArgumentException exception];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
if (_socket != nil)
[self close];
[super dealloc];
}
- (bool)lowlevelIsAtEndOfStream
{
return _atEndOfStream;
}
- (size_t)lowlevelReadIntoBuffer: (void *)buffer length: (size_t)length
{
if (_socket == nil)
@throw [OFNotOpenException exceptionWithObject: self];
if (_atEndOfStream)
return 0;
if (_socket.atEndOfStream)
@throw [OFTruncatedDataException exception];
/* Content-Length */
if (!_chunked) {
size_t ret;
if (length > (unsigned long long)_toRead)
length = (size_t)_toRead;
ret = [_socket readIntoBuffer: buffer length: length];
_toRead -= ret;
if (_toRead == 0)
_atEndOfStream = true;
return ret;
}
/* Chunked */
if (_toRead == -2) {
char tmp[2];
switch ([_socket readIntoBuffer: tmp length: 2]) {
case 2:
_toRead++;
if (tmp[1] != '\n')
@throw [OFInvalidFormatException exception];
case 1:
_toRead++;
if (tmp[0] != '\r')
@throw [OFInvalidFormatException exception];
}
if (_setAtEndOfStream && _toRead == 0)
_atEndOfStream = true;
return 0;
} else if (_toRead == -1) {
char tmp;
if ([_socket readIntoBuffer: &tmp length: 1] == 1) {
_toRead++;
if (tmp != '\n')
@throw [OFInvalidFormatException exception];
}
if (_setAtEndOfStream && _toRead == 0)
_atEndOfStream = true;
return 0;
} else if (_toRead > 0) {
if (length > (unsigned long long)_toRead)
length = (size_t)_toRead;
length = [_socket readIntoBuffer: buffer length: length];
_toRead -= length;
if (_toRead == 0)
_toRead = -2;
return length;
} else {
void *pool = objc_autoreleasePoolPush();
OFString *line;
size_t pos;
unsigned long long toRead;
@try {
line = [_socket tryReadLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidFormatException exception];
}
if (line == nil)
return 0;
pos = [line rangeOfString: @";"].location;
if (pos != OFNotFound)
line = [line substringToIndex: pos];
if (line.length < 1) {
/*
* We have read the empty string because the socket is
* at end of stream.
*/
if (_socket.atEndOfStream && pos == OFNotFound)
@throw [OFTruncatedDataException exception];
else
@throw [OFInvalidFormatException exception];
}
toRead = [line unsignedLongLongValueWithBase: 16];
if (toRead > LLONG_MAX)
@throw [OFOutOfRangeException exception];
_toRead = (long long)toRead;
if (_toRead == 0) {
_setAtEndOfStream = true;
_toRead = -2;
}
objc_autoreleasePoolPop(pool);
return 0;
}
}
- (bool)lowlevelHasDataInReadBuffer
{
return _socket.hasDataInReadBuffer;
}
- (int)fileDescriptorForReading
{
return _socket.fileDescriptorForReading;
}
- (void)close
{
if (_socket == nil)
@throw [OFNotOpenException exceptionWithObject: self];
[_socket release];
_socket = nil;
[super close];
}
@end
#ifdef OF_HAVE_THREADS
@implementation OFHTTPServerThread
- (void)stop
{
[[OFRunLoop currentRunLoop] stop];
[self join];
}
@end
#endif
@implementation OFHTTPServer
@synthesize delegate = _delegate, name = _name;
+ (instancetype)server
{
return [[[self alloc] init] autorelease];
}
- (instancetype)init
{
self = [super init];
_name = @"OFHTTPServer (ObjFW's HTTP server class "
@"<https://objfw.nil.im/>)";
#ifdef OF_HAVE_THREADS
_numberOfThreads = 1;
#endif
return self;
}
- (void)dealloc
{
[self stop];
[_host release];
[_listeningSocket release];
[_name release];
[super dealloc];
}
- (void)setHost: (OFString *)host
{
OFString *old;
if (_listeningSocket != nil)
@throw [OFAlreadyOpenException exceptionWithObject: self];
old = _host;
_host = [host copy];
[old release];
}
- (OFString *)host
{
return _host;
}
- (void)setPort: (uint16_t)port
{
if (_listeningSocket != nil)
@throw [OFAlreadyOpenException exceptionWithObject: self];
_port = port;
}
- (uint16_t)port
{
return _port;
}
#ifdef OF_HAVE_THREADS
- (void)setNumberOfThreads: (size_t)numberOfThreads
{
if (numberOfThreads == 0)
@throw [OFInvalidArgumentException exception];
if (_listeningSocket != nil)
@throw [OFAlreadyOpenException exceptionWithObject: self];
_numberOfThreads = numberOfThreads;
}
- (size_t)numberOfThreads
{
return _numberOfThreads;
}
#endif
- (void)start
{
void *pool = objc_autoreleasePoolPush();
OFSocketAddress address;
if (_host == nil)
@throw [OFInvalidArgumentException exception];
if (_listeningSocket != nil)
@throw [OFAlreadyOpenException exceptionWithObject: self];
_listeningSocket = [[OFTCPSocket alloc] init];
address = [_listeningSocket bindToHost: _host port: _port];
_port = OFSocketAddressIPPort(&address);
[_listeningSocket listen];
#ifdef OF_HAVE_THREADS
if (_numberOfThreads > 1) {
OFMutableArray *threads =
[OFMutableArray arrayWithCapacity: _numberOfThreads - 1];
for (size_t i = 1; i < _numberOfThreads; i++) {
OFHTTPServerThread *thread =
[OFHTTPServerThread thread];
thread.supportsSockets = true;
[thread start];
[threads addObject: thread];
}
[threads makeImmutable];
_threadPool = [threads copy];
}
#endif
_listeningSocket.delegate = self;
[_listeningSocket asyncAccept];
objc_autoreleasePoolPop(pool);
}
- (void)stop
{
[_listeningSocket cancelAsyncRequests];
[_listeningSocket release];
_listeningSocket = nil;
#ifdef OF_HAVE_THREADS
for (OFHTTPServerThread *thread in _threadPool)
[thread stop];
[_threadPool release];
_threadPool = nil;
#endif
}
- (void)of_handleAcceptedSocket: (OFStreamSocket *)acceptedSocket
{
OFHTTPServerConnection *connection = [[[OFHTTPServerConnection alloc]
initWithSocket: acceptedSocket
server: self] autorelease];
acceptedSocket.delegate = connection;
[acceptedSocket asyncReadLine];
}
- (bool)socket: (OFStreamSocket *)sock
didAcceptSocket: (OFStreamSocket *)acceptedSocket
exception: (id)exception
{
if (exception != nil) {
if (![_delegate respondsToSelector:
@selector(server:didReceiveExceptionOnListeningSocket:)])
return false;
return [_delegate server: self
didReceiveExceptionOnListeningSocket: exception];
}
#ifdef OF_HAVE_THREADS
if (_numberOfThreads > 1) {
OFHTTPServerThread *thread =
[_threadPool objectAtIndex: _nextThreadIndex];
if (++_nextThreadIndex >= _numberOfThreads - 1)
_nextThreadIndex = 0;
[self performSelector: @selector(of_handleAcceptedSocket:)
onThread: thread
withObject: acceptedSocket
waitUntilDone: false];
} else
#endif
[self of_handleAcceptedSocket: acceptedSocket];
return true;
}
@end