368 lines
14 KiB
Plaintext
Executable File
368 lines
14 KiB
Plaintext
Executable File
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTJavaScriptLoader.h"
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#import <sys/stat.h>
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#import <cxxreact/JSBundleType.h>
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#import <jschelpers/JavaScriptCore.h>
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#import "RCTBridge.h"
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#import "RCTConvert.h"
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#import "RCTMultipartDataTask.h"
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#import "RCTPerformanceLogger.h"
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#import "RCTUtils.h"
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NSString *const RCTJavaScriptLoaderErrorDomain = @"RCTJavaScriptLoaderErrorDomain";
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@interface RCTSource()
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{
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@public
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NSURL *_url;
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NSData *_data;
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NSUInteger _length;
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NSInteger _filesChangedCount;
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}
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@end
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@implementation RCTSource
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static RCTSource *RCTSourceCreate(NSURL *url, NSData *data, int64_t length) NS_RETURNS_RETAINED
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{
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RCTSource *source = [RCTSource new];
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source->_url = url;
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source->_data = data;
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source->_length = length;
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source->_filesChangedCount = RCTSourceFilesChangedCountNotBuiltByBundler;
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return source;
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}
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@end
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@implementation RCTLoadingProgress
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- (NSString *)description
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{
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NSMutableString *desc = [NSMutableString new];
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[desc appendString:_status ?: @"Loading"];
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if ([_total integerValue] > 0) {
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[desc appendFormat:@" %ld%% (%@/%@)", (long)(100 * [_done integerValue] / [_total integerValue]), _done, _total];
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}
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[desc appendString:@"\u2026"];
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return desc;
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}
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@end
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@implementation RCTJavaScriptLoader
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RCT_NOT_IMPLEMENTED(- (instancetype)init)
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+ (void)loadBundleAtURL:(NSURL *)scriptURL onProgress:(RCTSourceLoadProgressBlock)onProgress onComplete:(RCTSourceLoadBlock)onComplete
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{
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int64_t sourceLength;
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NSError *error;
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NSData *data = [self attemptSynchronousLoadOfBundleAtURL:scriptURL
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runtimeBCVersion:JSNoBytecodeFileFormatVersion
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sourceLength:&sourceLength
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error:&error];
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if (data) {
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onComplete(nil, RCTSourceCreate(scriptURL, data, sourceLength));
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return;
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}
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const BOOL isCannotLoadSyncError =
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[error.domain isEqualToString:RCTJavaScriptLoaderErrorDomain]
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&& error.code == RCTJavaScriptLoaderErrorCannotBeLoadedSynchronously;
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if (isCannotLoadSyncError) {
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attemptAsynchronousLoadOfBundleAtURL(scriptURL, onProgress, onComplete);
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} else {
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onComplete(error, nil);
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}
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}
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+ (NSData *)attemptSynchronousLoadOfBundleAtURL:(NSURL *)scriptURL
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runtimeBCVersion:(int32_t)runtimeBCVersion
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sourceLength:(int64_t *)sourceLength
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error:(NSError **)error
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{
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NSString *unsanitizedScriptURLString = scriptURL.absoluteString;
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// Sanitize the script URL
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scriptURL = sanitizeURL(scriptURL);
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if (!scriptURL) {
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorNoScriptURL
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userInfo:@{NSLocalizedDescriptionKey:
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[NSString stringWithFormat:@"No script URL provided. Make sure the packager is "
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@"running or you have embedded a JS bundle in your application bundle.\n\n"
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@"unsanitizedScriptURLString = %@", unsanitizedScriptURLString]}];
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}
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return nil;
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}
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// Load local script file
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if (!scriptURL.fileURL) {
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorCannotBeLoadedSynchronously
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userInfo:@{NSLocalizedDescriptionKey:
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[NSString stringWithFormat:@"Cannot load %@ URLs synchronously",
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scriptURL.scheme]}];
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}
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return nil;
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}
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// Load the first 4 bytes to check if the bundle is regular or RAM ("Random Access Modules" bundle).
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// The RAM bundle has a magic number in the 4 first bytes `(0xFB0BD1E5)`.
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// The benefit of RAM bundle over a regular bundle is that we can lazily inject
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// modules into JSC as they're required.
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FILE *bundle = fopen(scriptURL.path.UTF8String, "r");
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if (!bundle) {
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorFailedOpeningFile
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userInfo:@{NSLocalizedDescriptionKey:
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[NSString stringWithFormat:@"Error opening bundle %@", scriptURL.path]}];
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}
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return nil;
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}
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facebook::react::BundleHeader header;
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size_t readResult = fread(&header, sizeof(header), 1, bundle);
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fclose(bundle);
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if (readResult != 1) {
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorFailedReadingFile
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userInfo:@{NSLocalizedDescriptionKey:
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[NSString stringWithFormat:@"Error reading bundle %@", scriptURL.path]}];
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}
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return nil;
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}
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facebook::react::ScriptTag tag = facebook::react::parseTypeFromHeader(header);
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switch (tag) {
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case facebook::react::ScriptTag::RAMBundle:
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break;
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case facebook::react::ScriptTag::String: {
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#if RCT_ENABLE_INSPECTOR
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NSData *source = [NSData dataWithContentsOfFile:scriptURL.path
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options:NSDataReadingMappedIfSafe
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error:error];
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if (sourceLength && source != nil) {
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*sourceLength = source.length;
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}
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return source;
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#else
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorCannotBeLoadedSynchronously
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userInfo:@{NSLocalizedDescriptionKey:
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@"Cannot load text/javascript files synchronously"}];
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}
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return nil;
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#endif
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}
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case facebook::react::ScriptTag::BCBundle:
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if (runtimeBCVersion == JSNoBytecodeFileFormatVersion || runtimeBCVersion < 0) {
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorBCNotSupported
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userInfo:@{NSLocalizedDescriptionKey:
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@"Bytecode bundles are not supported by this runtime."}];
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}
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return nil;
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}
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else if ((uint32_t)runtimeBCVersion != header.version) {
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if (error) {
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NSString *errDesc =
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[NSString stringWithFormat:@"BC Version Mismatch. Expect: %d, Actual: %u",
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runtimeBCVersion, header.version];
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorBCVersion
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userInfo:@{NSLocalizedDescriptionKey: errDesc}];
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}
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return nil;
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}
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break;
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}
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struct stat statInfo;
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if (stat(scriptURL.path.UTF8String, &statInfo) != 0) {
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if (error) {
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*error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorFailedStatingFile
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userInfo:@{NSLocalizedDescriptionKey:
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[NSString stringWithFormat:@"Error stating bundle %@", scriptURL.path]}];
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}
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return nil;
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}
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if (sourceLength) {
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*sourceLength = statInfo.st_size;
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}
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return [NSData dataWithBytes:&header length:sizeof(header)];
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}
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static void parseHeaders(NSDictionary *headers, RCTSource *source) {
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source->_filesChangedCount = [headers[@"X-Metro-Files-Changed-Count"] integerValue];
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}
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static void attemptAsynchronousLoadOfBundleAtURL(NSURL *scriptURL, RCTSourceLoadProgressBlock onProgress, RCTSourceLoadBlock onComplete)
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{
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scriptURL = sanitizeURL(scriptURL);
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if (scriptURL.fileURL) {
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// Reading in a large bundle can be slow. Dispatch to the background queue to do it.
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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NSError *error = nil;
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NSData *source = [NSData dataWithContentsOfFile:scriptURL.path
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options:NSDataReadingMappedIfSafe
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error:&error];
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onComplete(error, RCTSourceCreate(scriptURL, source, source.length));
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});
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return;
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}
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RCTMultipartDataTask *task = [[RCTMultipartDataTask alloc] initWithURL:scriptURL partHandler:^(NSInteger statusCode, NSDictionary *headers, NSData *data, NSError *error, BOOL done) {
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if (!done) {
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if (onProgress) {
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onProgress(progressEventFromData(data));
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}
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return;
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}
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// Handle general request errors
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if (error) {
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if ([error.domain isEqualToString:NSURLErrorDomain]) {
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error = [NSError errorWithDomain:RCTJavaScriptLoaderErrorDomain
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code:RCTJavaScriptLoaderErrorURLLoadFailed
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userInfo:
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@{
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NSLocalizedDescriptionKey:
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[@"Could not connect to development server.\n\n"
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"Ensure the following:\n"
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"- Node server is running and available on the same network - run 'npm start' from react-native root\n"
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"- Node server URL is correctly set in AppDelegate\n"
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"- WiFi is enabled and connected to the same network as the Node Server\n\n"
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"URL: " stringByAppendingString:scriptURL.absoluteString],
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NSLocalizedFailureReasonErrorKey: error.localizedDescription,
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NSUnderlyingErrorKey: error,
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}];
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}
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onComplete(error, nil);
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return;
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}
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// For multipart responses packager sets X-Http-Status header in case HTTP status code
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// is different from 200 OK
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NSString *statusCodeHeader = headers[@"X-Http-Status"];
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if (statusCodeHeader) {
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statusCode = [statusCodeHeader integerValue];
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}
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if (statusCode != 200) {
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error = [NSError errorWithDomain:@"JSServer"
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code:statusCode
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userInfo:userInfoForRawResponse([[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding])];
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onComplete(error, nil);
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return;
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}
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// Validate that the packager actually returned javascript.
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NSString *contentType = headers[@"Content-Type"];
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NSString *mimeType = [[contentType componentsSeparatedByString:@";"] firstObject];
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if (![mimeType isEqualToString:@"application/javascript"] &&
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![mimeType isEqualToString:@"text/javascript"]) {
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NSString *description = [NSString stringWithFormat:@"Expected MIME-Type to be 'application/javascript' or 'text/javascript', but got '%@'.", mimeType];
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error = [NSError errorWithDomain:@"JSServer"
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code:NSURLErrorCannotParseResponse
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userInfo:@{
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NSLocalizedDescriptionKey: description,
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@"headers": headers,
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@"data": data
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}];
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onComplete(error, nil);
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return;
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}
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RCTSource *source = RCTSourceCreate(scriptURL, data, data.length);
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parseHeaders(headers, source);
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onComplete(nil, source);
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} progressHandler:^(NSDictionary *headers, NSNumber *loaded, NSNumber *total) {
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// Only care about download progress events for the javascript bundle part.
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if ([headers[@"Content-Type"] isEqualToString:@"application/javascript"]) {
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onProgress(progressEventFromDownloadProgress(loaded, total));
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}
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}];
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[task startTask];
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}
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static NSURL *sanitizeURL(NSURL *url)
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{
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// Why we do this is lost to time. We probably shouldn't; passing a valid URL is the caller's responsibility not ours.
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return [RCTConvert NSURL:url.absoluteString];
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}
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static RCTLoadingProgress *progressEventFromData(NSData *rawData)
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{
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NSString *text = [[NSString alloc] initWithData:rawData encoding:NSUTF8StringEncoding];
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id info = RCTJSONParse(text, nil);
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if (!info || ![info isKindOfClass:[NSDictionary class]]) {
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return nil;
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}
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RCTLoadingProgress *progress = [RCTLoadingProgress new];
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progress.status = info[@"status"];
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progress.done = info[@"done"];
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progress.total = info[@"total"];
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return progress;
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}
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static RCTLoadingProgress *progressEventFromDownloadProgress(NSNumber *total, NSNumber *done)
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{
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RCTLoadingProgress *progress = [RCTLoadingProgress new];
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progress.status = @"Downloading JavaScript bundle";
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// Progress values are in bytes transform them to kilobytes for smaller numbers.
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progress.done = done != nil ? @([done integerValue] / 1024) : nil;
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progress.total = total != nil ? @([total integerValue] / 1024) : nil;
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return progress;
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}
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static NSDictionary *userInfoForRawResponse(NSString *rawText)
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{
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NSDictionary *parsedResponse = RCTJSONParse(rawText, nil);
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if (![parsedResponse isKindOfClass:[NSDictionary class]]) {
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return @{NSLocalizedDescriptionKey: rawText};
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}
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NSArray *errors = parsedResponse[@"errors"];
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if (![errors isKindOfClass:[NSArray class]]) {
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return @{NSLocalizedDescriptionKey: rawText};
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}
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NSMutableArray<NSDictionary *> *fakeStack = [NSMutableArray new];
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for (NSDictionary *err in errors) {
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[fakeStack addObject: @{
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@"methodName": err[@"description"] ?: @"",
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@"file": err[@"filename"] ?: @"",
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@"lineNumber": err[@"lineNumber"] ?: @0
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}];
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}
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return @{NSLocalizedDescriptionKey: parsedResponse[@"message"] ?: @"No message provided", @"stack": [fakeStack copy]};
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}
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@end
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