react-native/Libraries/Network/RCTDataRequestHandler.m

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/**
* Copyright (c) 2015-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 "RCTDataRequestHandler.h"
@implementation RCTDataRequestHandler
{
NSOperationQueue *_queue;
}
RCT_EXPORT_MODULE()
- (void)invalidate
{
[_queue cancelAllOperations];
_queue = nil;
}
- (BOOL)canHandleRequest:(NSURLRequest *)request
{
return [request.URL.scheme caseInsensitiveCompare:@"data"] == NSOrderedSame;
}
- (NSOperation *)sendRequest:(NSURLRequest *)request
withDelegate:(id<RCTURLRequestDelegate>)delegate
{
// Lazy setup
if (!_queue) {
_queue = [NSOperationQueue new];
_queue.maxConcurrentOperationCount = 2;
}
__weak __block NSBlockOperation *weakOp;
__block NSBlockOperation *op = [NSBlockOperation blockOperationWithBlock:^{
// Get mime type
NSRange firstSemicolon = [request.URL.resourceSpecifier rangeOfString:@";"];
NSString *mimeType = firstSemicolon.length ? [request.URL.resourceSpecifier substringToIndex:firstSemicolon.location] : nil;
// Send response
NSURLResponse *response = [[NSURLResponse alloc] initWithURL:request.URL
MIMEType:mimeType
expectedContentLength:-1
textEncodingName:nil];
[delegate URLRequest:weakOp didReceiveResponse:response];
// Load data
NSError *error;
NSData *data = [NSData dataWithContentsOfURL:request.URL
options:NSDataReadingMappedIfSafe
error:&error];
if (data) {
[delegate URLRequest:weakOp didReceiveData:data];
}
[delegate URLRequest:weakOp didCompleteWithError:error];
}];
weakOp = op;
[_queue addOperation:op];
return op;
}
- (void)cancelRequest:(NSOperation *)op
{
[op cancel];
}
@end