/*
* 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 <ctype.h>
#include <errno.h>
#include <string.h>
#import "OFHTTPClient.h"
#import "OFHTTPRequest.h"
#import "OFHTTPResponse.h"
#import "OFString.h"
#import "OFURL.h"
#import "OFTCPSocket.h"
#import "OFDictionary.h"
#import "OFDataArray.h"
#import "OFHTTPRequestFailedException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFInvalidServerReplyException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "OFReadFailedException.h"
#import "OFTruncatedDataException.h"
#import "OFUnsupportedProtocolException.h"
#import "OFUnsupportedVersionException.h"
#import "OFWriteFailedException.h"
static OF_INLINE void
normalizeKey(char *str_)
{
unsigned char *str = (unsigned char*)str_;
bool firstLetter = true;
while (*str != '\0') {
if (!of_ascii_isalpha(*str)) {
firstLetter = true;
str++;
continue;
}
*str = (firstLetter
? of_ascii_toupper(*str)
: of_ascii_tolower(*str));
firstLetter = false;
str++;
}
}
@interface OFHTTPClientResponse: OFHTTPResponse
{
OFTCPSocket *_socket;
bool _hasContentLength, _chunked, _keepAlive, _atEndOfStream;
size_t _toRead;
}
- initWithSocket: (OFTCPSocket*)socket;
- (void)OF_setKeepAlive: (bool)keepAlive;
@end
@implementation OFHTTPClientResponse
- initWithSocket: (OFTCPSocket*)socket
{
self = [super init];
_socket = [socket retain];
return self;
}
- (void)OF_setKeepAlive: (bool)keepAlive
{
_keepAlive = keepAlive;
}
- (void)dealloc
{
[_socket release];
[super dealloc];
}
- (void)setHeaders: (OFDictionary*)headers
{
OFString *contentLength;
[super setHeaders: headers];
_chunked = [[headers objectForKey: @"Transfer-Encoding"]
isEqual: @"chunked"];
contentLength = [headers objectForKey: @"Content-Length"];
if (contentLength != nil) {
_hasContentLength = true;
@try {
intmax_t toRead = [contentLength decimalValue];
if (toRead < 0)
@throw [OFInvalidServerReplyException
exception];
if (sizeof(intmax_t) > sizeof(size_t) &&
toRead > (intmax_t)SIZE_MAX)
@throw [OFOutOfRangeException exception];
_toRead = (size_t)toRead;
} @catch (OFInvalidFormatException *e) {
@throw [OFInvalidServerReplyException exception];
}
}
}
- (size_t)lowlevelReadIntoBuffer: (void*)buffer
length: (size_t)length
{
if (_atEndOfStream)
@throw [OFReadFailedException exceptionWithObject: self
requestedLength: length
errNo: ENOTCONN];
if (!_hasContentLength && !_chunked)
return [_socket readIntoBuffer: buffer
length: length];
/* Content-Length */
if (!_chunked) {
size_t ret;
if (_toRead == 0) {
_atEndOfStream = true;
if (!_keepAlive)
[_socket close];
return 0;
}
if (_toRead < length)
ret = [_socket readIntoBuffer: buffer
length: _toRead];
else
ret = [_socket readIntoBuffer: buffer
length: length];
_toRead -= ret;
return ret;
}
/* Chunked */
if (_toRead > 0) {
if (length > _toRead)
length = _toRead;
length = [_socket readIntoBuffer: buffer
length: length];
_toRead -= length;
if (_toRead == 0)
if ([[_socket readLine] length] > 0)
@throw [OFInvalidServerReplyException
exception];
return length;
} else {
void *pool = objc_autoreleasePoolPush();
OFString *line;
of_range_t range;
@try {
line = [_socket readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException exception];
}
range = [line rangeOfString: @";"];
if (range.location != OF_NOT_FOUND)
line = [line substringWithRange:
of_range(0, range.location)];
@try {
uintmax_t toRead = [line hexadecimalValue];
if (toRead > SIZE_MAX)
@throw [OFOutOfRangeException exception];
_toRead = (size_t)toRead;
} @catch (OFInvalidFormatException *e) {
@throw [OFInvalidServerReplyException exception];
}
if (_toRead == 0) {
_atEndOfStream = true;
if (_keepAlive) {
@try {
line = [_socket readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException
exception];
}
if ([line length] > 0)
@throw [OFInvalidServerReplyException
exception];
} else
[_socket close];
}
objc_autoreleasePoolPop(pool);
return 0;
}
}
- (bool)lowlevelIsAtEndOfStream
{
if (!_hasContentLength && !_chunked)
return [_socket isAtEndOfStream];
return _atEndOfStream;
}
- (int)fileDescriptorForReading
{
if (_socket == nil)
return -1;
return [_socket fileDescriptorForReading];
}
- (bool)hasDataInReadBuffer
{
return ([super hasDataInReadBuffer] || [_socket hasDataInReadBuffer]);
}
- (void)close
{
[_socket release];
_socket = nil;
[super close];
}
@end
@implementation OFHTTPClient
@synthesize delegate = _delegate;
@synthesize insecureRedirectsAllowed = _insecureRedirectsAllowed;
+ (instancetype)client
{
return [[[self alloc] init] autorelease];
}
- (void)dealloc
{
[self close];
[super dealloc];
}
- (OFHTTPResponse*)performRequest: (OFHTTPRequest*)request
{
return [self performRequest: request
redirects: 10];
}
- (OFTCPSocket*)OF_closeAndCreateSocketForRequest: (OFHTTPRequest*)request
{
OFURL *URL = [request URL];
OFTCPSocket *socket;
[self close];
if ([[URL scheme] isEqual: @"https"]) {
if (of_tls_socket_class == Nil)
@throw [OFUnsupportedProtocolException
exceptionWithURL: URL];
socket = [[[of_tls_socket_class alloc] init]
autorelease];
} else
socket = [OFTCPSocket socket];
if ([_delegate respondsToSelector:
@selector(client:didCreateSocket:request:)])
[_delegate client: self
didCreateSocket: socket
request: request];
[socket connectToHost: [URL host]
port: [URL port]];
return socket;
}
- (OFHTTPResponse*)performRequest: (OFHTTPRequest*)request
redirects: (size_t)redirects
{
void *pool = objc_autoreleasePoolPush();
OFURL *URL = [request URL];
OFString *scheme = [URL scheme];
of_http_request_method_t method = [request method];
OFString *path;
OFMutableString *requestString;
OFString *user, *password;
OFMutableDictionary OF_GENERIC(OFString*, OFString*) *headers;
OFDataArray *body = [request body];
OFTCPSocket *socket;
OFHTTPClientResponse *response;
OFString *line, *version, *redirect, *connectionHeader;
bool keepAlive;
OFMutableDictionary OF_GENERIC(OFString*, OFString*) *serverHeaders;
OFEnumerator *keyEnumerator, *objectEnumerator;
OFString *key, *object;
int status;
if (![scheme isEqual: @"http"] && ![scheme isEqual: @"https"])
@throw [OFUnsupportedProtocolException exceptionWithURL: URL];
/* Can we reuse the socket? */
if (_socket != nil && [[_lastURL scheme] isEqual: scheme] &&
[[_lastURL host] isEqual: [URL host]] &&
[_lastURL port] == [URL port]) {
/*
* Set _socket to nil, so that in case of an error it won't be
* reused. If everything is successfull, we set _socket again
* at the end.
*/
socket = [_socket autorelease];
_socket = nil;
[_lastURL release];
_lastURL = nil;
@try {
if (!_lastWasHEAD) {
/*
* Throw away content that has not been read
* yet.
*/
while (![_lastResponse isAtEndOfStream]) {
char buffer[512];
[_lastResponse readIntoBuffer: buffer
length: 512];
}
}
} @finally {
[_lastResponse release];
_lastResponse = nil;
}
} else
socket = [self OF_closeAndCreateSocketForRequest: request];
/*
* As a work around for a bug with split packets in lighttpd when using
* HTTPS, we construct the complete request in a buffer string and then
* send it all at once.
*/
path = [URL path];
if (path == nil)
path = @"/";
if ([URL query] != nil)
requestString = [OFMutableString stringWithFormat:
@"%s %@?%@ HTTP/%@\r\n",
of_http_request_method_to_string(method), path,
[[URL query] stringByURLEncoding],
[request protocolVersionString]];
else
requestString = [OFMutableString stringWithFormat:
@"%s %@ HTTP/%@\r\n",
of_http_request_method_to_string(method), path,
[request protocolVersionString]];
headers = [[[request headers] mutableCopy] autorelease];
if (headers == nil)
headers = [OFMutableDictionary dictionary];
if ([headers objectForKey: @"Host"] == nil) {
if (([scheme isEqual: @"http"] && [URL port] != 80) ||
([scheme isEqual: @"https"] && [URL port] != 443)) {
OFString *host = [OFString stringWithFormat:
@"%@:%d", [URL host], [URL port]];
[headers setObject: host
forKey: @"Host"];
} else
[headers setObject: [URL host]
forKey: @"Host"];
}
user = [URL user];
password = [URL password];
if (([user length] > 0 || [password length] > 0) &&
[headers objectForKey: @"Authorization"] == nil) {
OFDataArray *authorizationData = [OFDataArray dataArray];
OFString *authorization;
[authorizationData addItems: [user UTF8String]
count: [user UTF8StringLength]];
[authorizationData addItem: ":"];
[authorizationData addItems: [password UTF8String]
count: [password UTF8StringLength]];
authorization = [OFString stringWithFormat:
@"Basic %@", [authorizationData stringByBase64Encoding]];
[headers setObject: authorization
forKey: @"Authorization"];
}
if ([headers objectForKey: @"User-Agent"] == nil)
[headers setObject: @"Something using ObjFW "
@"<https://heap.zone/objfw>"
forKey: @"User-Agent"];
if (body != nil) {
if ([headers objectForKey: @"Content-Length"] == nil) {
OFString *contentLength = [OFString stringWithFormat:
@"%zd", [body itemSize] * [body count]];
[headers setObject: contentLength
forKey: @"Content-Length"];
}
if ([headers objectForKey: @"Content-Type"] == nil)
[headers setObject: @"application/x-www-form-"
@"urlencoded; charset=UTF-8"
forKey: @"Content-Type"];
}
if ([request protocolVersion].major == 1 &&
[request protocolVersion].minor == 0 &&
[headers objectForKey: @"Connection"] == nil)
[headers setObject: @"keep-alive"
forKey: @"Connection"];
keyEnumerator = [headers keyEnumerator];
objectEnumerator = [headers objectEnumerator];
while ((key = [keyEnumerator nextObject]) != nil &&
(object = [objectEnumerator nextObject]) != nil)
[requestString appendFormat: @"%@: %@\r\n", key, object];
[requestString appendString: @"\r\n"];
@try {
[socket writeString: requestString];
} @catch (OFWriteFailedException *e) {
if ([e errNo] != ECONNRESET && [e errNo] != EPIPE)
@throw e;
/* Reconnect in case a keep-alive connection timed out */
socket = [self OF_closeAndCreateSocketForRequest: request];
[socket writeString: requestString];
}
if (body != nil)
[socket writeBuffer: [body items]
length: [body count] * [body itemSize]];
@try {
line = [socket readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException exception];
}
/*
* It's possible that the write succeeds on a connection that is
* keep-alive, but the connection has already been closed by the remote
* end due to a timeout. In this case, we need to reconnect.
*/
if (line == nil) {
socket = [self OF_closeAndCreateSocketForRequest: request];
[socket writeString: requestString];
if (body != nil)
[socket writeBuffer: [body items]
length: [body count] *
[body itemSize]];
@try {
line = [socket readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException exception];
}
}
if (![line hasPrefix: @"HTTP/"] || [line length] < 9 ||
[line characterAtIndex: 8] != ' ')
@throw [OFInvalidServerReplyException exception];
version = [line substringWithRange: of_range(5, 3)];
if (![version isEqual: @"1.0"] && ![version isEqual: @"1.1"])
@throw [OFUnsupportedVersionException
exceptionWithVersion: version];
status = (int)[[line substringWithRange: of_range(9, 3)] decimalValue];
serverHeaders = [OFMutableDictionary dictionary];
for (;;) {
OFString *key, *value, *old;
const char *lineC, *tmp;
char *keyC;
@try {
line = [socket readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException exception];
}
if (line == nil)
@throw [OFInvalidServerReplyException exception];
if ([line length] == 0)
break;
lineC = [line UTF8String];
if ((tmp = strchr(lineC, ':')) == NULL)
@throw [OFInvalidServerReplyException exception];
if ((keyC = malloc(tmp - lineC + 1)) == NULL)
@throw [OFOutOfMemoryException
exceptionWithRequestedSize: tmp - lineC + 1];
memcpy(keyC, lineC, tmp - lineC);
keyC[tmp - lineC] = '\0';
normalizeKey(keyC);
@try {
key = [OFString stringWithUTF8StringNoCopy: keyC
freeWhenDone: true];
} @catch (id e) {
free(keyC);
@throw e;
}
do {
tmp++;
} while (*tmp == ' ');
value = [OFString stringWithUTF8String: tmp];
old = [serverHeaders objectForKey: key];
if (old != nil)
value = [old stringByAppendingFormat: @",%@", value];
[serverHeaders setObject: value
forKey: key];
}
[serverHeaders makeImmutable];
if ([_delegate respondsToSelector:
@selector(client:didReceiveHeaders:statusCode:request:)])
[_delegate client: self
didReceiveHeaders: serverHeaders
statusCode: status
request: request];
response = [[[OFHTTPClientResponse alloc] initWithSocket: socket]
autorelease];
[response setProtocolVersionFromString: version];
[response setStatusCode: status];
[response setHeaders: serverHeaders];
connectionHeader = [serverHeaders objectForKey: @"Connection"];
if ([version isEqual: @"1.1"]) {
if (connectionHeader != nil)
keepAlive = ([connectionHeader caseInsensitiveCompare:
@"close"] != OF_ORDERED_SAME);
else
keepAlive = true;
} else {
if (connectionHeader != nil)
keepAlive = ([connectionHeader caseInsensitiveCompare:
@"keep-alive"] == OF_ORDERED_SAME);
else
keepAlive = false;
}
if (keepAlive) {
[response OF_setKeepAlive: true];
_socket = [socket retain];
_lastURL = [URL copy];
_lastWasHEAD = (method == OF_HTTP_REQUEST_METHOD_HEAD);
_lastResponse = [response retain];
}
/* FIXME: Case-insensitive check of redirect's scheme */
if (redirects > 0 && (status == 301 || status == 302 ||
status == 303 || status == 307) &&
(redirect = [serverHeaders objectForKey: @"Location"]) != nil &&
(_insecureRedirectsAllowed || [scheme isEqual: @"http"] ||
[redirect hasPrefix: @"https://"])) {
OFURL *newURL;
bool follow;
newURL = [OFURL URLWithString: redirect
relativeToURL: URL];
if ([_delegate respondsToSelector: @selector(client:
shouldFollowRedirect:statusCode:request:response:)])
follow = [_delegate client: self
shouldFollowRedirect: newURL
statusCode: status
request: request
response: response];
else {
/*
* 301, 302 and 307 should only redirect with user
* confirmation if the request method is not GET or
* HEAD. Asking the delegate and getting true returned
* is considered user confirmation.
*/
if (method == OF_HTTP_REQUEST_METHOD_GET ||
method == OF_HTTP_REQUEST_METHOD_HEAD)
follow = true;
/*
* 303 should always be redirected and converted to a
* GET request.
*/
else if (status == 303)
follow = true;
else
follow = false;
}
if (follow) {
OFHTTPRequest *newRequest =
[[request copy] autorelease];
OFMutableDictionary *newHeaders =
[[headers mutableCopy] autorelease];
if (![[newURL host] isEqual: [URL host]])
[newHeaders removeObjectForKey: @"Host"];
/*
* 303 means the request should be converted to a GET
* request before redirection. This also means stripping
* the entity of the request.
*/
if (status == 303) {
OFEnumerator *keyEnumerator, *objectEnumerator;
id key, object;
keyEnumerator = [headers keyEnumerator];
objectEnumerator = [headers objectEnumerator];
while ((key = [keyEnumerator nextObject]) !=
nil &&
(object = [objectEnumerator nextObject]) !=
nil)
if ([key hasPrefix: @"Content-"])
[newHeaders
removeObjectForKey: key];
[newRequest setMethod:
OF_HTTP_REQUEST_METHOD_GET];
[newRequest setBody: nil];
}
[newRequest setURL: newURL];
[newRequest setHeaders: newHeaders];
[newRequest retain];
objc_autoreleasePoolPop(pool);
[newRequest autorelease];
return [self performRequest: newRequest
redirects: redirects - 1];
}
}
[response retain];
objc_autoreleasePoolPop(pool);
[response autorelease];
if (status / 100 != 2)
@throw [OFHTTPRequestFailedException
exceptionWithRequest: request
response: response];
return response;
}
- (void)close
{
[_socket close];
[_socket release];
_socket = nil;
[_lastURL release];
_lastURL = nil;
[_lastResponse release];
_lastResponse = nil;
}
@end