ObjFW  Diff

#import "OFArray.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFDictionary.h"
#import "OFHTTPRequest.h"
#import "OFHTTPResponse.h"
#import "OFNumber.h"

#import "OFTCPSocket.h"
#import "OFTLSSocket.h"
#import "OFThread.h"
#import "OFTimer.h"
#import "OFURL.h"

#import "OFAlreadyConnectedException.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"

#import "socket_helpers.h"

#define BUFFER_SIZE 1024

/*
 * FIXME: Key normalization replaces headers like "DNT" with "Dnt".
 * FIXME: Errors are not reported to the user.
 */

@interface OFHTTPServer () <OFTCPSocketDelegate>
@end

@interface OFHTTPServerConnection: OFObject <OFTCPSocketDelegate>
{
@public
	OFStreamSocket *_socket;
	OFHTTPServer *_server;
	OFTimer *_timer;
	enum {
		AWAITING_PROLOG,
		PARSING_HEADERS,
		SEND_RESPONSE
	} _state;
	uint8_t _HTTPMinorVersion;
	of_http_request_method_t _method;
	OFString *_host, *_path;
	uint16_t _port;
	OFMutableDictionary *_headers;
	size_t _contentLength;
	OFStream *_requestBody;
}

- (void)stop;
@end
#endif

static OF_INLINE OFString *
normalizedKey(OFString *key)
{
	char *cString = of_strdup(key.UTF8String);
	unsigned char *tmp = (unsigned char *)cString;
	bool firstLetter = true;

	if (cString == NULL)
		@throw [OFOutOfMemoryException
		    exceptionWithRequestedSize: strlen(key.UTF8String)];

	while (*tmp != '\0') {
		if (!of_ascii_isalpha(*tmp)) {
			firstLetter = true;
			tmp++;
			continue;
		}

		*tmp = (firstLetter
		    ? of_ascii_toupper(*tmp)
		    : of_ascii_tolower(*tmp));

		firstLetter = false;
		tmp++;
	}

	@try {
		return [OFString stringWithUTF8StringNoCopy: cString
					       freeWhenDone: true];
	} @catch (id e) {
		free(cString);
		@throw e;
	}
}

@implementation OFHTTPServerResponse
- (instancetype)initWithSocket: (OFStreamSocket *)sock
			server: (OFHTTPServer *)server

	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,
			      of_http_status_code_to_string(_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)
		return [_socket writeBuffer: buffer
				     length: 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
{

		_server = [server retain];
		_timer = [[OFTimer
		    scheduledTimerWithTimeInterval: 10
					    target: _socket
					  selector: @selector(
							cancelAsyncRequests)
					   repeats: false] retain];
		_state = AWAITING_PROLOG;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

     exception: (id)exception
{
	if (line == nil || exception != nil)
		return false;

	@try {
		switch (_state) {
		case AWAITING_PROLOG:
			return [self parseProlog: line];
		case PARSING_HEADERS:
			return [self parseHeaders: line];
		default:
			return false;
		}
	} @catch (OFWriteFailedException *e) {
		return false;
	}

	OF_ENSURE(0);
}

- (bool)parseProlog: (OFString *)line
{
	OFString *method;
	OFMutableString *path;
	size_t pos;

	@try {
		OFString *version = [line
		    substringWithRange: of_range(line.length - 9, 9)];
		of_unichar_t 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 == OF_NOT_FOUND)
		return [self sendErrorAndClose: 400];

	method = [line substringToIndex: pos];
	@try {
		_method = of_http_request_method_from_string(method);
	} @catch (OFInvalidArgumentException *e) {
		return [self sendErrorAndClose: 405];
	}

	@try {
		of_range_t range = of_range(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 = PARSING_HEADERS;

	return true;
}

- (bool)parseHeaders: (OFString *)line
{
	OFString *key, *value, *old;

			     contentLength: contentLength];

			[_timer invalidate];
			[_timer release];
			_timer = nil;
		}

		_state = SEND_RESPONSE;
		[self createResponse];

		return false;
	}

	pos = [line rangeOfString: @":"].location;
	if (pos == OF_NOT_FOUND)
		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: OF_STRING_SEARCH_BACKWARDS].location;

		if (pos != OF_NOT_FOUND) {
			[_host release];
			_host = [[value substringToIndex: pos] retain];

			@try {
				unsigned long long portTmp =
				    [value substringFromIndex: pos + 1]
				    .unsignedLongLongValue;

	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,
			      of_http_status_code_to_string(statusCode),
			      date, _server.name];

	return false;
}

- (void)createResponse
{
	void *pool = objc_autoreleasePoolPush();
	OFMutableURL *URL;

	URL = [OFMutableURL URL];
	URL.scheme = @"http";
	URL.host = _host;
	if (_port != 80)
		URL.port = [OFNumber numberWithUnsignedShort: _port];

	if ((pos = [_path rangeOfString: @"?"].location) != OF_NOT_FOUND) {
		OFString *path, *query;

		path = [_path substringToIndex: pos];
		query = [_path substringFromIndex: pos + 1];

		URL.URLEncodedPath = path;
		URL.URLEncodedQuery = query;
	} else
		URL.URLEncodedPath = _path;

	[URL makeImmutable];

	request = [OFHTTPRequest requestWithURL: URL];
	request.method = _method;
	request.protocolVersion =
	    (of_http_request_protocol_version_t){ 1, _HTTPMinorVersion };
	request.headers = _headers;
	request.remoteAddress = _socket.remoteAddress;

	response = [[[OFHTTPServerResponse alloc]
	    initWithSocket: _socket
		    server: _server
		   request: request] autorelease];

}

- (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 != OF_NOT_FOUND)
			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 == OF_NOT_FOUND)
				@throw [OFTruncatedDataException exception];
			else
				@throw [OFInvalidFormatException exception];
		}

		toRead = [line unsignedLongLongValueWithBase: 16];
		if (toRead > LLONG_MAX)

	if (_listeningSocket != nil)
		@throw [OFAlreadyConnectedException exception];

	if (_usesTLS) {
		OFTCPSocket <OFTLSSocket> *TLSSocket;

		if (of_tls_socket_class == Nil)
			@throw [OFUnsupportedProtocolException exception];

		TLSSocket = [[of_tls_socket_class alloc] init];
		_listeningSocket = TLSSocket;

		TLSSocket.certificateFile = _certificateFile;
		TLSSocket.privateKeyFile = _privateKeyFile;
		TLSSocket.privateKeyPassphrase = _privateKeyPassphrase;
	} else
		_listeningSocket = [[OFTCPSocket alloc] init];

	_port = [_listeningSocket bindToHost: _host
					port: _port];
	[_listeningSocket listen];

#ifdef OF_HAVE_THREADS
	if (_numberOfThreads > 1) {
		OFMutableArray *threads =
		    [OFMutableArray arrayWithCapacity: _numberOfThreads - 1];

	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];