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fix panic in github interceptor #357

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merged 1 commit into from
Jan 22, 2020
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@dibyom dibyom commented Jan 17, 2020

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We were passing the original request where the body had been drained
to the first interceptor meaning that the body to the first interceptor
in the chain was always empty. Further, we were using the GetBody which
can sometimes be empty leading to a panic.

fixes #355

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Fixes bug that caused panic when Github interceptor was used as the first interceptor

@tekton-robot tekton-robot added the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Jan 17, 2020
@tekton-robot tekton-robot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Jan 17, 2020
@dibyom dibyom force-pushed the panic branch 2 times, most recently from a3c6b94 to b2535aa Compare January 17, 2020 23:07
@tekton-robot tekton-robot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Jan 17, 2020
@dibyom dibyom marked this pull request as ready for review January 17, 2020 23:31
@tekton-robot tekton-robot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Jan 17, 2020
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tektoncd/plumbing#186 is hitting here too :(

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/retest
@dibyom can you update the release not part of the PR description ? 😛

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/lgtm

@tekton-robot tekton-robot added the lgtm Indicates that a PR is ready to be merged. label Jan 20, 2020
@@ -231,6 +231,189 @@ func TestHandleEvent(t *testing.T) {
}
}

func TestHandleEventWithInterceptors(t *testing.T) {
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This is repeating TestHandleEvent with only a few differences. We could use a testing table so that we could test [0-2] interceptors in a bit less verbose way. This seems fine though.

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Yeah long term, I want to extract the common bits out into a couple of helper methods that create the required resources, and the clients (like we do in the reconciler tests in pipeline). For this PR though, I wanted to keep the non-fix changes to a minimum

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Ran a manual test and also good 👍

}
defer body.Close()
payload, err := ioutil.ReadAll(body)
defer request.Body.Close()
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@wlynch wlynch Jan 21, 2020

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This still runs the risk of panicking if request or Body is nil. We probably want to have checks here to handle gracefully.

Example - https://play.golang.org/p/HstyZm09vuE

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Good point; let me add some checks

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@dibyom dibyom Jan 21, 2020

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testing this is going to require us to refactor our tests a bit...gonna make this a new commit in this PR!

fixed! PTAL

We were passing the original request where the body had been drained
to the first interceptor meaning that the body to the first interceptor
in the chain was always empty. Further, we were using the `GetBody` which
can sometimes be empty leading to a panic.

fixes tektoncd#355

Signed-off-by: Dibyo Mukherjee <dibyo@google.com>
@tekton-robot tekton-robot removed the lgtm Indicates that a PR is ready to be merged. label Jan 21, 2020
@dibyom dibyom added this to the Triggers 0.2.1 milestone Jan 21, 2020
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/lgtm

payload, err := ioutil.ReadAll(body)
if err != nil {
return nil, fmt.Errorf("error reading request body: %w", err)
var payload = []byte(`{}`)
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I don't feel too strongly about this, but should we be consistent with the webhook handler and default to []byte{}?

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Sure, we'd have to do it the other way around though since makeCelEnv errors out if you pass it []byte{}

@tekton-robot tekton-robot added the lgtm Indicates that a PR is ready to be merged. label Jan 22, 2020
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vdemeester, wlynch

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@tekton-robot tekton-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Jan 22, 2020
@tekton-robot tekton-robot merged commit 63f3bad into tektoncd:master Jan 22, 2020
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invalid memory address or nil pointer dereference on v0.2.0
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