/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* Jonathan Schleifer <js@webkeks.org>
*
* 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"
#define OF_HTTP_REQUEST_M
#include <string.h>
#include <ctype.h>
#import "OFHTTPRequest.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 "OFOutOfRangeException.h"
#import "OFTruncatedDataException.h"
#import "OFUnsupportedProtocolException.h"
#import "OFUnsupportedVersionException.h"
#import "autorelease.h"
#import "macros.h"
Class of_http_request_tls_socket_class = Nil;
static OF_INLINE void
normalizeKey(OFString *key)
{
uint8_t *str = (uint8_t*)[key UTF8String];
BOOL firstLetter = YES;
while (*str != '\0') {
if (!isalnum(*str)) {
firstLetter = YES;
str++;
continue;
}
*str = (firstLetter ? toupper(*str) : tolower(*str));
firstLetter = NO;
str++;
}
}
@implementation OFHTTPRequest
+ (instancetype)request
{
return [[[self alloc] init] autorelease];
}
+ (instancetype)requestWithURL: (OFURL*)URL
{
return [[[self alloc] initWithURL: URL] autorelease];
}
- init
{
self = [super init];
requestType = OF_HTTP_REQUEST_TYPE_GET;
headers = [[OFDictionary alloc]
initWithObject: @"Something using ObjFW "
@"<https://webkeks.org/objfw/>"
forKey: @"User-Agent"];
storesData = YES;
return self;
}
- initWithURL: (OFURL*)URL_
{
self = [self init];
@try {
[self setURL: URL_];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[URL release];
[queryString release];
[headers release];
[super dealloc];
}
- (void)setURL: (OFURL*)URL_
{
OF_SETTER(URL, URL_, YES, 1)
}
- (OFURL*)URL
{
OF_GETTER(URL, YES)
}
- (void)setRequestType: (of_http_request_type_t)requestType_
{
requestType = requestType_;
}
- (of_http_request_type_t)requestType
{
return requestType;
}
- (void)setQueryString: (OFString*)queryString_
{
OF_SETTER(queryString, queryString_, YES, 1)
}
- (OFString*)queryString
{
OF_GETTER(queryString, YES)
}
- (void)setHeaders: (OFDictionary*)headers_
{
OF_SETTER(headers, headers_, YES, 1)
}
- (OFDictionary*)headers
{
OF_GETTER(headers, YES)
}
- (void)setRedirectsFromHTTPSToHTTPAllowed: (BOOL)allowed
{
redirectsFromHTTPSToHTTPAllowed = allowed;
}
- (BOOL)redirectsFromHTTPSToHTTPAllowed
{
return redirectsFromHTTPSToHTTPAllowed;
}
- (void)setDelegate: (id <OFHTTPRequestDelegate>)delegate_
{
delegate = delegate_;
}
- (id <OFHTTPRequestDelegate>)delegate
{
return delegate;
}
- (void)setStoresData: (BOOL)storesData_
{
storesData = storesData_;
}
- (BOOL)storesData
{
return storesData;
}
- (OFHTTPRequestResult*)perform
{
return [self performWithRedirects: 10];
}
- (OFHTTPRequestResult*)performWithRedirects: (size_t)redirects
{
void *pool = objc_autoreleasePoolPush();
OFString *scheme = [URL scheme];
OFTCPSocket *sock;
OFHTTPRequestResult *result;
OFString *line, *path, *version;
OFMutableDictionary *serverHeaders;
OFDataArray *data;
OFEnumerator *keyEnumerator, *objectEnumerator;
OFString *key, *object, *contentLengthHeader;
int status;
const char *type = NULL;
size_t contentLength = 0;
BOOL chunked;
char *buffer;
size_t bytesReceived;
if (![scheme isEqual: @"http"] && ![scheme isEqual: @"https"])
@throw [OFUnsupportedProtocolException
exceptionWithClass: [self class]
URL: URL];
if ([scheme isEqual: @"http"])
sock = [OFTCPSocket socket];
else {
if (of_http_request_tls_socket_class == Nil)
@throw [OFUnsupportedProtocolException
exceptionWithClass: [self class]
URL: URL];
sock = [[[of_http_request_tls_socket_class alloc] init]
autorelease];
}
[delegate request: self
didCreateSocket: sock];
[sock connectToHost: [URL host]
port: [URL port]];
/*
* Work around a bug with packet bisection in lighttpd when using
* HTTPS.
*/
[sock setWriteBufferEnabled: YES];
if (requestType == OF_HTTP_REQUEST_TYPE_GET)
type = "GET";
if (requestType == OF_HTTP_REQUEST_TYPE_HEAD)
type = "HEAD";
if (requestType == OF_HTTP_REQUEST_TYPE_POST)
type = "POST";
if ([(path = [URL path]) isEqual: @""])
path = @"/";
if ([URL query] != nil)
[sock writeFormat: @"%s %@?%@ HTTP/1.1\r\n",
type, path, [URL query]];
else
[sock writeFormat: @"%s %@ HTTP/1.1\r\n", type, path];
if ([URL port] == 80)
[sock writeFormat: @"Host: %@\r\n", [URL host]];
else
[sock writeFormat: @"Host: %@:%d\r\n", [URL host],
[URL port]];
[sock writeString: @"Connection: close\r\n"];
keyEnumerator = [headers keyEnumerator];
objectEnumerator = [headers objectEnumerator];
while ((key = [keyEnumerator nextObject]) != nil &&
(object = [objectEnumerator nextObject]) != nil)
[sock writeFormat: @"%@: %@\r\n", key, object];
if (requestType == OF_HTTP_REQUEST_TYPE_POST) {
if ([headers objectForKey: @"Content-Type"] == nil)
[sock writeString: @"Content-Type: "
@"application/x-www-form-urlencoded; "
@"charset=UTF-8\r\n"];
if ([headers objectForKey: @"Content-Length"] == nil)
[sock writeFormat: @"Content-Length: %d\r\n",
[queryString UTF8StringLength]];
}
[sock writeString: @"\r\n"];
/* Work around a bug in lighttpd, see above */
[sock flushWriteBuffer];
[sock setWriteBufferEnabled: NO];
if (requestType == OF_HTTP_REQUEST_TYPE_POST)
[sock writeString: queryString];
@try {
line = [sock readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
}
if (![line hasPrefix: @"HTTP/"] || [line characterAtIndex: 8] != ' ')
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
version = [line substringWithRange: of_range(5, 3)];
if (![version isEqual: @"1.0"] && ![version isEqual: @"1.1"])
@throw [OFUnsupportedVersionException
exceptionWithClass: [self class]
version: version];
status = (int)[[line substringWithRange: of_range(9, 3)] decimalValue];
serverHeaders = [OFMutableDictionary dictionary];
for (;;) {
OFString *key, *value;
const char *line_c, *tmp;
@try {
line = [sock readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
}
if (line == nil)
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
if ([line isEqual: @""])
break;
line_c = [line UTF8String];
if ((tmp = strchr(line_c, ':')) == NULL)
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
key = [OFString stringWithUTF8String: line_c
length: tmp - line_c];
normalizeKey(key);
do {
tmp++;
} while (*tmp == ' ');
value = [OFString stringWithUTF8String: tmp];
if ((redirects > 0 && (status == 301 || status == 302 ||
status == 303 || status == 307) &&
[key isEqual: @"Location"]) &&
(redirectsFromHTTPSToHTTPAllowed ||
[scheme isEqual: @"http"] ||
![value hasPrefix: @"http://"])) {
OFURL *new;
BOOL follow;
new = [OFURL URLWithString: value
relativeToURL: URL];
follow = [delegate request: self
willFollowRedirectTo: new];
if (!follow && delegate != nil) {
[serverHeaders setObject: value
forKey: key];
continue;
}
new = [new retain];
[URL release];
URL = new;
if (status == 303) {
requestType = OF_HTTP_REQUEST_TYPE_GET;
[queryString release];
queryString = nil;
}
objc_autoreleasePoolPop(pool);
return [self performWithRedirects: redirects - 1];
}
[serverHeaders setObject: value
forKey: key];
}
[delegate request: self
didReceiveHeaders: serverHeaders
withStatusCode: status];
data = (storesData ? [OFDataArray dataArray] : nil);
chunked = [[serverHeaders objectForKey: @"Transfer-Encoding"]
isEqual: @"chunked"];
contentLengthHeader = [serverHeaders objectForKey: @"Content-Length"];
if (contentLengthHeader != nil) {
contentLength = (size_t)[contentLengthHeader decimalValue];
if (contentLength > SIZE_MAX)
@throw [OFOutOfRangeException
exceptionWithClass: [self class]];
}
buffer = [self allocMemoryWithSize: of_pagesize];
bytesReceived = 0;
@try {
if (chunked) {
for (;;) {
void *pool2 = objc_autoreleasePoolPush();
size_t toRead;
of_range_t range;
@try {
line = [sock readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
}
range = [line rangeOfString: @";"];
if (range.start != OF_INVALID_INDEX)
line = [line substringWithRange:
of_range(0, range.start)];
@try {
toRead =
(size_t)[line hexadecimalValue];
} @catch (OFInvalidFormatException *e) {
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
}
if (toRead == 0 ||
(contentLengthHeader != nil &&
contentLength >= bytesReceived))
break;
while (toRead > 0) {
size_t length = (toRead < of_pagesize
? toRead : of_pagesize);
length = [sock readIntoBuffer: buffer
length: length];
[delegate request: self
didReceiveData: buffer
withLength: length];
objc_autoreleasePoolPop(pool2);
pool2 = objc_autoreleasePoolPush();
bytesReceived += length;
[data addItemsFromCArray: buffer
count: length];
toRead -= length;
}
@try {
line = [sock readLine];
} @catch (OFInvalidEncodingException *e) {
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
}
if (![line isEqual: @""])
@throw [OFInvalidServerReplyException
exceptionWithClass: [self class]];
objc_autoreleasePoolPop(pool2);
}
} else {
size_t length;
while (![sock isAtEndOfStream]) {
void *pool2;
length = [sock readIntoBuffer: buffer
length: of_pagesize];
pool2 = objc_autoreleasePoolPush();
[delegate request: self
didReceiveData: buffer
withLength: length];
objc_autoreleasePoolPop(pool2);
bytesReceived += length;
[data addItemsFromCArray: buffer
count: length];
if (contentLengthHeader != nil &&
bytesReceived >= contentLength)
break;
}
}
} @finally {
[self freeMemory: buffer];
}
[sock close];
/*
* We only want to throw on these status codes as we will throw an
* OFHTTPRequestFailedException for all other status codes later.
*/
if (contentLengthHeader != nil && contentLength != bytesReceived &&
(status == 200 || status == 301 || status == 302 || status == 303 ||
status == 307))
@throw [OFTruncatedDataException
exceptionWithClass: [self class]];
[serverHeaders makeImmutable];
result = [[OFHTTPRequestResult alloc] initWithStatusCode: status
headers: serverHeaders
data: data];
switch (status) {
case 200:
case 301:
case 302:
case 303:
case 307:
break;
default:
[result autorelease];
@throw [OFHTTPRequestFailedException
exceptionWithClass: [self class]
request: self
result: result];
}
objc_autoreleasePoolPop(pool);
return [result autorelease];
}
@end
@implementation OFHTTPRequestResult
- initWithStatusCode: (short)status
headers: (OFDictionary*)headers_
data: (OFDataArray*)data_
{
self = [super init];
statusCode = status;
data = [data_ retain];
headers = [headers_ copy];
return self;
}
- (void)dealloc
{
[data release];
[headers release];
[super dealloc];
}
- (short)statusCode
{
return statusCode;
}
- (OFDictionary*)headers
{
OF_GETTER(headers, YES)
}
- (OFDataArray*)data
{
OF_GETTER(data, YES)
}
@end
@implementation OFObject (OFHTTPRequestDelegate)
- (void)request: (OFHTTPRequest*)request
didCreateSocket: (OFTCPSocket*)socket
{
}
- (void)request: (OFHTTPRequest*)request
didReceiveHeaders: (OFDictionary*)headers
withStatusCode: (int)statusCode
{
}
- (void)request: (OFHTTPRequest*)request
didReceiveData: (const char*)data
withLength: (size_t)len
{
}
- (BOOL)request: (OFHTTPRequest*)request
willFollowRedirectTo: (OFURL*)url
{
return YES;
}
@end