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Validate the content type of the bundle returned by the packager #15112

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Validate the content type of the bundle returned by the packager #15112

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15 changes: 15 additions & 0 deletions React/Base/RCTJavaScriptLoader.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -243,6 +243,21 @@ static void attemptAsynchronousLoadOfBundleAtURL(NSURL *scriptURL, RCTSourceLoad
onComplete(error, nil, 0);
return;
}

// Validate that the packager actually returned javascript.
NSString *contentType = headers[@"Content-Type"];
if (![contentType isEqualToString:@"application/javascript"]) {
error = [NSError errorWithDomain:@"JSServer"
code:NSURLErrorCannotParseResponse
userInfo:@{
NSLocalizedDescriptionKey: [NSString stringWithFormat:@"Expected JavaScript, but got content type '%@'.", contentType],
@"headers": headers,
@"data": data
}];
onComplete(error, nil, 0);
return;
}

onComplete(nil, data, data.length);
}];

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