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author | Moonchild <moonchild@palemoon.org> | 2020-10-21 23:48:32 +0000 |
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committer | Moonchild <moonchild@palemoon.org> | 2020-10-24 10:38:21 +0000 |
commit | 10bf4a6d5b651141171e648fde1b0ba25a87d37d (patch) | |
tree | 21f8760ec3e328af66e15f449217bf7a2f91e874 /dom/fetch/FetchDriver.cpp | |
parent | c3778db14df34e88bfd3663b2b3fb54ead633402 (diff) | |
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[DOM Fetch] Detect broken pipes and propagate that write error to the caller.
Diffstat (limited to 'dom/fetch/FetchDriver.cpp')
-rw-r--r-- | dom/fetch/FetchDriver.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/dom/fetch/FetchDriver.cpp b/dom/fetch/FetchDriver.cpp index d028ffdba..14c000121 100644 --- a/dom/fetch/FetchDriver.cpp +++ b/dom/fetch/FetchDriver.cpp @@ -772,6 +772,17 @@ FetchDriver::OnDataAvailable(nsIRequest* aRequest, nsresult rv = aInputStream->ReadSegments(NS_CopySegmentToStream, mPipeOutputStream, aCount, &aRead); + + // If no data was read, it's possible the output stream is closed but the + // ReadSegments call followed its contract of returning NS_OK despite write + // errors. Unfortunately, nsIOutputStream has an ill-conceived contract when + // taken together with ReadSegments' contract, because the pipe will just + // NS_OK if we try and invoke its Write* functions ourselves with a 0 count. + // So we must just assume the pipe is broken. + if (aRead == 0 && aCount != 0) { + return NS_BASE_STREAM_CLOSED; + } + return rv; } |