Handle ResponseAccumulator not being able to buffer large response in memory #637
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… memory Check content length header for early exit
dnadoba
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gjcairo
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Oct 8, 2022
| public var maxBodySize: Int = maxByteBufferSize { | ||
| didSet { | ||
| precondition( | ||
| self.maxBodySize <= Self.maxByteBufferSize, |
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Relatively minor, but wouldn't it also make sense to verify that the new value isn't negative?
Lukasa
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Oct 8, 2022
| switch self.state { | ||
| case .idle: | ||
| if let contentLength = head.headers.first(name: "Content-Length"), | ||
| let announcedBodySize = Int(contentLength), |
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Should we be tolerating the possibility of a non-integer Content-Length field here?
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That's at least what we do in swift-nio so far:
https://github.com/apple/swift-nio/blob/41f0b2d3983038ae68bbb902ea43e123a5466494/Sources/NIOHTTP1/HTTPTypes.swift#L1508
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Lukasa
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Motivation
If the response being buffered by the
ResponseAccumulatoris too large (larger thanUInt32.max), a crash will occur.Modifications
public var maxBodySize: IntonResponseAccumulatorResponseTooBigErrorif the response bodies size is larger thanmaxBodySizeResult
Will now fail graciously if too big a response is buffered in memory via the
ResponseAccumulator.In addition, a user can configure the max size themself.