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// Copyright 2017 Google
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <FirebaseCore/FIRAppInternal.h>
#import "FIRStorageTokenAuthorizer.h"
#import "FIRStorageConstants.h"
#import "FIRStorageConstants_Private.h"
#import "FIRStorageErrors.h"
#import "FirebaseStorage.h"
#import <FirebaseCore/FIRApp.h>
#import <FirebaseCore/FIROptions.h>
@implementation FIRStorageTokenAuthorizer {
@private
// Firebase App which vends tokens
FIRApp *_app;
}
@synthesize fetcherService = _fetcherService;
- (instancetype)initWithApp:(FIRApp *)app fetcherService:(GTMSessionFetcherService *)service {
self = [super init];
if (self) {
_app = app;
_fetcherService = service;
}
return self;
}
#pragma mark - GTMFetcherAuthorizationProtocol methods
- (void)authorizeRequest:(NSMutableURLRequest *)request
delegate:(id)delegate
didFinishSelector:(SEL)sel {
// Set version header on each request
NSString *versionString = [NSString stringWithFormat:@"ios/%s", FIRStorageVersionString];
[request setValue:versionString forHTTPHeaderField:@"x-firebase-storage-version"];
// Set GMP ID on each request
NSString *GMPAppId = _app.options.googleAppID;
[request setValue:GMPAppId forHTTPHeaderField:@"x-firebase-gmpid"];
if (delegate && sel) {
id selfParam = self;
NSMethodSignature *sig = [delegate methodSignatureForSelector:sel];
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:sig];
[invocation setSelector:sel];
[invocation setTarget:delegate];
[invocation setArgument:&selfParam atIndex:2];
[invocation setArgument:&request atIndex:3];
dispatch_queue_t callbackQueue = self.fetcherService.callbackQueue;
if (!callbackQueue) {
callbackQueue = dispatch_get_main_queue();
}
[invocation retainArguments];
if (_app.getTokenImplementation) {
[_app getTokenForcingRefresh:NO
withCallback:^(NSString *_Nullable token, NSError *_Nullable error) {
if (error) {
NSMutableDictionary *errorDictionary =
[NSMutableDictionary dictionaryWithDictionary:error.userInfo];
errorDictionary[kFIRStorageResponseErrorDomain] = error.domain;
errorDictionary[kFIRStorageResponseErrorCode] = @(error.code);
NSError *tokenError =
[FIRStorageErrors errorWithCode:FIRStorageErrorCodeUnauthenticated
infoDictionary:errorDictionary];
[invocation setArgument:&tokenError atIndex:4];
} else if (token) {
NSString *firebaseToken =
[NSString stringWithFormat:kFIRStorageAuthTokenFormat, token];
[request setValue:firebaseToken forHTTPHeaderField:@"Authorization"];
}
dispatch_async(callbackQueue, ^{
[invocation invoke];
});
}];
} else {
dispatch_async(callbackQueue, ^{
[invocation invoke];
});
}
}
}
// Note that stopAuthorization, isAuthorizingRequest, and userEmail
// aren't relevant with the Firebase App/Auth implementation of tokens,
// and thus aren't implemented. Token refresh is handled transparently
// for us, and we don't allow the auth request to be stopped.
// Auth is also not required so the world doesn't stop.
- (void)stopAuthorization {
// Noop
}
- (void)stopAuthorizationForRequest:(NSURLRequest *)request {
// Noop
}
- (BOOL)isAuthorizingRequest:(NSURLRequest *)request {
return NO;
}
- (BOOL)isAuthorizedRequest:(NSURLRequest *)request {
NSString *authHeader = request.allHTTPHeaderFields[@"Authorization"];
BOOL isFirebaseToken = [authHeader hasPrefix:@"Firebase"];
return isFirebaseToken;
}
- (NSString *)userEmail {
// Noop
return nil;
}
@end
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