mirror of
https://gitcode.com/GitHub_Trending/ji/jitsi-meet.git
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4a8f787519
We are downloading code off the Internet and executing it on the user's device, so run it sandboxed to avoid potential bad actors. Since it's impossible to eval() safely in JS and React Native doesn't offer something akin to Node's vm module, here we are rolling our own. On Android it uses the Duktape JavaScript engine and on iOS the builtin JavaScriptCore engine. The extra JS engine is *only* used for evaluating the downloaded code and returning a JSON string which is then passed back to RN.
56 lines
1.5 KiB
Objective-C
56 lines
1.5 KiB
Objective-C
/*
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* Copyright @ 2019-present 8x8, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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@import JavaScriptCore;
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#import <React/RCTBridgeModule.h>
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@interface JavaScriptSandbox : NSObject<RCTBridgeModule>
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@end
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@implementation JavaScriptSandbox
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RCT_EXPORT_MODULE();
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+ (BOOL)requiresMainQueueSetup {
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return NO;
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}
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#pragma mark - Exported methods
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RCT_EXPORT_METHOD(evaluate:(NSString *)code
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resolve:(RCTPromiseResolveBlock)resolve
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reject:(RCTPromiseRejectBlock)reject) {
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__block BOOL hasError = NO;
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JSContext *ctx = [[JSContext alloc] init];
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ctx.exceptionHandler = ^(JSContext *context, JSValue *exception) {
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hasError = YES;
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reject(@"evaluate", [exception toString], nil);
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};
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JSValue *ret = [ctx evaluateScript:code];
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if (!hasError) {
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NSString *result = [ret toString];
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if (result == nil) {
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reject(@"evaluate", @"Error in string coercion", nil);
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} else {
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resolve(result);
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}
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}
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}
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@end
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