Memory leak fix and cancel connection timeout timer in scheduleCleanup. #525
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This Pull Request fixes two issues: 1. Uses weak SRWebSocket object in the block of `_readUntilHeaderCompleteWithCallback`. Since consumers has a `_completion` block which will retain SRWebSocket instance, if we uses strong self, cycle reference will occur. To Reproduce this issue, just simply connect an invalid website, e.g. ws:://echo111.websocket111.org111 , set a breakpoint in `SRWebSocket:dealloc`, it will never go there. This bug was found by analyzing 'Allocation List' in the `Instruments` tool of Xcode. 2. Should cancel connection timeout timer in scheduleCleanup method, otherwise, the 'dealloc' method will be invoked only after the time (default: 60s) have come, which may cause memory increase. Since `dispatch_after` could not be cancelled, use `performSelector:withObject:afterDelay` & `cancelPreviousPerformRequestsWithTarget:selector:object` instead.
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I don't know why travis build was failed. :( |
kervich
approved these changes
Mar 15, 2018
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This Pull Request fixes two issues:
Uses weak SRWebSocket object in the block of
_readUntilHeaderCompleteWithCallback. Since consumers has a_completionblock which will retain SRWebSocket instance, if we uses strong self, cycle reference will occur.To Reproduce this issue, just simply connect an invalid website, e.g. ws:://echo111.websocket111.org111 , set a breakpoint in
SRWebSocket:dealloc, it will never go there. This bug was found by analyzingAllocation Listin theInstrumentstool of Xcode.Should cancel connection timeout timer in scheduleCleanup method, otherwise, the
SRWebSocket:deallocmethod will be invoked only after the time (default: 60s) have come, which may cause memory increase.Since
dispatch_aftercould not be cancelled, useperformSelector:withObject:afterDelay&cancelPreviousPerformRequestsWithTarget:selector:objectinstead.