/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#import "OFHTTPServer.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFDictionary.h"
#import "OFURL.h"
#import "OFHTTPRequest.h"
#import "OFHTTPResponse.h"
#import "OFTCPSocket.h"
#import "OFTimer.h"
#import "OFAlreadyConnectedException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFNotOpenException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.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 ()
- (bool)of_socket: (OFTCPSocket *)socket
didAcceptSocket: (OFTCPSocket *)clientSocket
exception: (OFException *)exception;
@end
static const char *
statusCodeToString(short code)
{
switch (code) {
case 100:
return "Continue";
case 101:
return "Switching Protocols";
case 200:
return "OK";
case 201:
return "Created";
case 202:
return "Accepted";
case 203:
return "Non-Authoritative Information";
case 204:
return "No Content";
case 205:
return "Reset Content";
case 206:
return "Partial Content";
case 300:
return "Multiple Choices";
case 301:
return "Moved Permanently";
case 302:
return "Found";
case 303:
return "See Other";
case 304:
return "Not Modified";
case 305:
return "Use Proxy";
case 307:
return "Temporary Redirect";
case 400:
return "Bad Request";
case 401:
return "Unauthorized";
case 402:
return "Payment Required";
case 403:
return "Forbidden";
case 404:
return "Not Found";
case 405:
return "Method Not Allowed";
case 406:
return "Not Acceptable";
case 407:
return "Proxy Authentication Required";
case 408:
return "Request Timeout";
case 409:
return "Conflict";
case 410:
return "Gone";
case 411:
return "Length Required";
case 412:
return "Precondition Failed";
case 413:
return "Request Entity Too Large";
case 414:
return "Request-URI Too Long";
case 415:
return "Unsupported Media Type";
case 416:
return "Requested Range Not Satisfiable";
case 417:
return "Expectation Failed";
case 500:
return "Internal Server Error";
case 501:
return "Not Implemented";
case 502:
return "Bad Gateway";
case 503:
return "Service Unavailable";
case 504:
return "Gateway Timeout";
case 505:
return "HTTP Version Not Supported";
default:
return NULL;
}
}
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++;
}
return [OFString stringWithUTF8StringNoCopy: cString
freeWhenDone: true];
}
@interface OFHTTPServerResponse: OFHTTPResponse
{
OFTCPSocket *_socket;
OFHTTPServer *_server;
OFHTTPRequest *_request;
bool _chunked, _headersSent;
}
- initWithSocket: (OFTCPSocket *)socket
server: (OFHTTPServer *)server
request: (OFHTTPRequest *)request;
@end
@implementation OFHTTPServerResponse
- initWithSocket: (OFTCPSocket *)socket
server: (OFHTTPServer *)server
request: (OFHTTPRequest *)request
{
self = [super init];
_statusCode = 500;
_socket = [socket retain];
_server = [server retain];
_request = [request retain];
return self;
}
- (void)dealloc
{
if (_socket != nil)
[self close]; /* includes [_socket release] */
[_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/%@ %d %s\r\n",
[self protocolVersionString], _statusCode,
statusCodeToString(_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);
}
- (void)lowlevelWriteBuffer: (const void *)buffer
length: (size_t)length
{
void *pool;
if (_socket == nil)
@throw [OFNotOpenException exceptionWithObject: self];
if (!_headersSent)
[self of_sendHeaders];
if (!_chunked) {
[_socket writeBuffer: buffer
length: length];
return;
}
pool = objc_autoreleasePoolPush();
[_socket writeString: [OFString stringWithFormat: @"%zx\r\n", length]];
objc_autoreleasePoolPop(pool);
[_socket writeBuffer: buffer
length: length];
[_socket writeBuffer: "\r\n"
length: 2];
}
- (void)close
{
if (_socket == nil)
@throw [OFNotOpenException exceptionWithObject: self];
@try {
if (!_headersSent)
[self of_sendHeaders];
if (_chunked)
[_socket writeBuffer: "0\r\n\r\n"
length: 5];
} @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
@interface OFHTTPServer_Connection: OFObject
{
OFTCPSocket *_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;
OFMutableData *_body;
}
- initWithSocket: (OFTCPSocket *)socket
server: (OFHTTPServer *)server;
- (bool)socket: (OFTCPSocket *)socket
didReadLine: (OFString *)line
exception: (OFException *)exception;
- (bool)parseProlog: (OFString *)line;
- (bool)parseHeaders: (OFString *)line;
- (bool)socket: (OFTCPSocket *)socket
didReadIntoBuffer: (char *)buffer
length: (size_t)length
exception: (OFException *)exception;
- (bool)sendErrorAndClose: (short)statusCode;
- (void)createResponse;
@end
@implementation OFHTTPServer_Connection
- initWithSocket: (OFTCPSocket *)socket
server: (OFHTTPServer *)server
{
self = [super init];
@try {
_socket = [socket retain];
_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;
}
- (void)dealloc
{
[_socket release];
[_server release];
[_timer invalidate];
[_timer release];
[_host release];
[_path release];
[_headers release];
[_body release];
[super dealloc];
}
- (bool)socket: (OFTCPSocket *)socket
didReadLine: (OFString *)line
exception: (OFException *)exception
{
if (line == nil || exception != nil)
return false;
@try {
switch (_state) {
case AWAITING_PROLOG:
return [self parseProlog: line];
case PARSING_HEADERS:
if (![self parseHeaders: line])
return false;
if (_state == SEND_RESPONSE) {
[self createResponse];
return false;
}
return true;
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 substringWithRange: of_range(0, pos)];
@try {
_method = of_http_request_method_from_string(
[method UTF8String]);
} @catch (OFInvalidFormatException *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;
size_t pos;
if ([line length] == 0) {
intmax_t contentLength;
@try {
contentLength = [[_headers
objectForKey: @"Content-Length"] decimalValue];
} @catch (OFInvalidFormatException *e) {
return [self sendErrorAndClose: 400];
}
if (contentLength > 0) {
char *buffer;
buffer = [self allocMemoryWithSize: BUFFER_SIZE];
_body = [[OFMutableData alloc] init];
[_socket asyncReadIntoBuffer: buffer
length: BUFFER_SIZE
target: self
selector: @selector(socket:
didReadIntoBuffer:
length:exception:)];
[_timer setFireDate:
[OFDate dateWithTimeIntervalSinceNow: 5]];
return false;
}
_state = SEND_RESPONSE;
return true;
}
pos = [line rangeOfString: @":"].location;
if (pos == OF_NOT_FOUND)
return [self sendErrorAndClose: 400];
key = [line substringWithRange: of_range(0, pos)];
value = [line substringWithRange:
of_range(pos + 1, [line length] - 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 substringWithRange:
of_range(0, pos)] retain];
@try {
of_range_t range =
of_range(pos + 1, [value length] - pos - 1);
intmax_t portTmp = [[value
substringWithRange: range] decimalValue];
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)socket: (OFTCPSocket *)socket
didReadIntoBuffer: (char *)buffer
length: (size_t)length
exception: (OFException *)exception
{
if ([socket isAtEndOfStream] || exception != nil)
return false;
[_body addItems: buffer
count: length];
if ([_body count] >= _contentLength) {
/*
* Manually free the buffer here. While this is not required
* now as the async read is the only thing referencing self and
* the buffer is allocated on self, it is required once
* Connection: keep-alive is implemented.
*/
[self freeMemory: buffer];
[_body makeImmutable];
@try {
[self createResponse];
} @catch (OFWriteFailedException *e) {
return false;
}
return false;
}
[_timer setFireDate: [OFDate dateWithTimeIntervalSinceNow: 5]];
return true;
}
- (bool)sendErrorAndClose: (short)statusCode
{
OFString *date = [[OFDate date]
dateStringWithFormat: @"%a, %d %b %Y %H:%M:%S GMT"];
[_socket writeFormat: @"HTTP/1.1 %d %s\r\n"
@"Date: %@\r\n"
@"Server: %@\r\n"
@"\r\n",
statusCode, statusCodeToString(statusCode),
date, [_server name]];
return false;
}
- (void)createResponse
{
OFMutableURL *URL;
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] retain];
_port = [_server port];
}
URL = [OFMutableURL URL];
[URL setScheme: @"http"];
[URL setHost: _host];
[URL setPort: _port];
if ((pos = [_path rangeOfString: @"?"].location) != OF_NOT_FOUND) {
OFString *path, *query;
path = [_path substringWithRange: of_range(0, pos)];
query = [_path substringWithRange:
of_range(pos + 1, [_path length] - pos - 1)];
[URL setPath: path];
[URL setQuery: query];
} else
[URL setPath: _path];
[URL makeImmutable];
request = [OFHTTPRequest requestWithURL: URL];
[request setMethod: _method];
[request setProtocolVersion:
(of_http_request_protocol_version_t){ 1, _HTTPMinorVersion }];
[request setHeaders: _headers];
[request setBody: _body];
[request setRemoteAddress: [_socket remoteAddress]];
response = [[[OFHTTPServerResponse alloc]
initWithSocket: _socket
server: _server
request: request] autorelease];
[[_server delegate] server: _server
didReceiveRequest: request
response: response];
}
@end
@implementation OFHTTPServer
@synthesize host = _host, port = _port, delegate = _delegate, name = _name;
+ (instancetype)server
{
return [[[self alloc] init] autorelease];
}
- init
{
self = [super init];
_name = @"OFHTTPServer (ObjFW's HTTP server class "
@"<https://heap.zone/objfw/>)";
return self;
}
- (void)dealloc
{
[_host release];
[_listeningSocket release];
[_name release];
[super dealloc];
}
- (void)start
{
if (_host == nil)
@throw [OFInvalidArgumentException exception];
if (_listeningSocket != nil)
@throw [OFAlreadyConnectedException exception];
_listeningSocket = [[OFTCPSocket alloc] init];
_port = [_listeningSocket bindToHost: _host
port: _port];
[_listeningSocket listen];
[_listeningSocket asyncAcceptWithTarget: self
selector: @selector(of_socket:
didAcceptSocket:
exception:)];
}
- (void)stop
{
[_listeningSocket cancelAsyncRequests];
[_listeningSocket release];
_listeningSocket = nil;
}
- (bool)of_socket: (OFTCPSocket *)socket
didAcceptSocket: (OFTCPSocket *)clientSocket
exception: (OFException *)exception
{
OFHTTPServer_Connection *connection;
if (exception != nil) {
if ([_delegate respondsToSelector:
@selector(server:didReceiveExceptionOnListeningSocket:)])
return [_delegate server: self
didReceiveExceptionOnListeningSocket: exception];
return false;
}
connection = [[[OFHTTPServer_Connection alloc]
initWithSocket: clientSocket
server: self] autorelease];
[clientSocket asyncReadLineWithTarget: connection
selector: @selector(socket:didReadLine:
exception:)];
return true;
}
@end