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2022-06-25 11:52:00 +08:00
//
// Copyright (c) 2016-present, Facebook, Inc.
// All rights reserved.
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#import "SRHTTPConnectMessage.h"
#import "SRURLUtilities.h"
NS_ASSUME_NONNULL_BEGIN
static NSString *_SRHTTPConnectMessageHost(NSURL *url)
{
NSString *host = url.host;
if (url.port) {
host = [host stringByAppendingFormat:@":%@", url.port];
}
return host;
}
CFHTTPMessageRef SRHTTPConnectMessageCreate(NSURLRequest *request,
NSString *securityKey,
uint8_t webSocketProtocolVersion,
NSArray<NSHTTPCookie *> *_Nullable cookies,
NSArray<NSString *> *_Nullable requestedProtocols)
{
NSURL *url = request.URL;
CFHTTPMessageRef message = CFHTTPMessageCreateRequest(NULL, CFSTR("GET"), (__bridge CFURLRef)url, kCFHTTPVersion1_1);
// Set host first so it defaults
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Host"), (__bridge CFStringRef)_SRHTTPConnectMessageHost(url));
NSMutableData *keyBytes = [[NSMutableData alloc] initWithLength:16];
int result = SecRandomCopyBytes(kSecRandomDefault, keyBytes.length, keyBytes.mutableBytes);
if (result != 0) {
//TODO: (nlutsenko) Check if there was an error.
}
// Apply cookies if any have been provided
if (cookies) {
NSDictionary<NSString *, NSString *> *messageCookies = [NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
[messageCookies enumerateKeysAndObjectsUsingBlock:^(NSString * _Nonnull key, NSString * _Nonnull obj, BOOL * _Nonnull stop) {
if (key.length && obj.length) {
CFHTTPMessageSetHeaderFieldValue(message, (__bridge CFStringRef)key, (__bridge CFStringRef)obj);
}
}];
}
// set header for http basic auth
NSString *basicAuthorizationString = SRBasicAuthorizationHeaderFromURL(url);
if (basicAuthorizationString) {
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Authorization"), (__bridge CFStringRef)basicAuthorizationString);
}
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Upgrade"), CFSTR("websocket"));
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Connection"), CFSTR("Upgrade"));
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Sec-WebSocket-Key"), (__bridge CFStringRef)securityKey);
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Sec-WebSocket-Version"), (__bridge CFStringRef)@(webSocketProtocolVersion).stringValue);
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Origin"), (__bridge CFStringRef)SRURLOrigin(url));
if (requestedProtocols.count) {
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Sec-WebSocket-Protocol"),
(__bridge CFStringRef)[requestedProtocols componentsJoinedByString:@", "]);
}
[request.allHTTPHeaderFields enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
CFHTTPMessageSetHeaderFieldValue(message, (__bridge CFStringRef)key, (__bridge CFStringRef)obj);
}];
return message;
}
NS_ASSUME_NONNULL_END