cloudfns: add issueswebhook to store issue events in GCS
To do historical analysis, it is helpful to have a corpus of
events data from GitHub. Store all GitHub events in a GCS
bucket until golang/go#29396 is fixed.
Updates golang/go#29396
Change-Id: Ia0172db93e019a8d6ab4ccf6e195f3a3e15583bd
Reviewed-on: https://go-review.googlesource.com/c/build/+/199638
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/cloudfns/issueswebhook/README.md b/cloudfns/issueswebhook/README.md
new file mode 100644
index 0000000..b76ab06
--- /dev/null
+++ b/cloudfns/issueswebhook/README.md
@@ -0,0 +1,9 @@
+# issueswebhook Cloud Function
+
+```sh
+gcloud functions deploy GitHubIssueChangeWebHook \
+ --project=symbolic-datum-552 \
+ --runtime go112 \
+ --trigger-http \
+ --set-env-vars=GCS_BUCKET=<bucket name>,GITHUB_WEBHOOK_SECRET=<github webhook secret>
+```
diff --git a/cloudfns/issueswebhook/go.mod b/cloudfns/issueswebhook/go.mod
new file mode 100644
index 0000000..e4a9b3d
--- /dev/null
+++ b/cloudfns/issueswebhook/go.mod
@@ -0,0 +1,20 @@
+module golang.org/x/build/cloudfns/issueswebhook
+
+go 1.12
+
+require (
+ cloud.google.com/go/storage v1.1.0
+ github.com/golang/groupcache v0.0.0-20191002201903-404acd9df4cc // indirect
+ github.com/google/go-github/v28 v28.1.1
+ github.com/jstemmer/go-junit-report v0.9.1 // indirect
+ go.opencensus.io v0.22.1 // indirect
+ golang.org/x/exp v0.0.0-20191002040644-a1355ae1e2c3 // indirect
+ golang.org/x/lint v0.0.0-20190930215403-16217165b5de // indirect
+ golang.org/x/net v0.0.0-20191009170851-d66e71096ffb // indirect
+ golang.org/x/sys v0.0.0-20191009170203-06d7bd2c5f4f // indirect
+ golang.org/x/tools v0.0.0-20191009213438-b090f1f24028 // indirect
+ google.golang.org/api v0.11.0 // indirect
+ google.golang.org/appengine v1.6.5 // indirect
+ google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 // indirect
+ google.golang.org/grpc v1.24.0 // indirect
+)
diff --git a/cloudfns/issueswebhook/go.sum b/cloudfns/issueswebhook/go.sum
new file mode 100644
index 0000000..eec583b
--- /dev/null
+++ b/cloudfns/issueswebhook/go.sum
@@ -0,0 +1,196 @@
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diff --git a/cloudfns/issueswebhook/issueswebhook.go b/cloudfns/issueswebhook/issueswebhook.go
new file mode 100644
index 0000000..ada1c52
--- /dev/null
+++ b/cloudfns/issueswebhook/issueswebhook.go
@@ -0,0 +1,78 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package issueswebhook implements a Google Cloud Function HTTP handler that
+// expects GitHub webhook change events. Specifically, it reacts to issue change
+// events and saves the data to a GCS bucket.
+package issueswebhook
+
+import (
+ "context"
+ "fmt"
+ "io"
+ "net/http"
+ "os"
+
+ "cloud.google.com/go/storage"
+ "github.com/google/go-github/v28/github"
+)
+
+var (
+ githubSecret = os.Getenv("GITHUB_WEBHOOK_SECRET")
+ bucket = os.Getenv("GCS_BUCKET")
+)
+
+func GitHubIssueChangeWebHook(w http.ResponseWriter, r *http.Request) {
+ b, err := github.ValidatePayload(r, []byte(githubSecret))
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Could not validate payload: %v\n", err)
+ http.Error(w, err.Error(), http.StatusUnauthorized)
+ return
+ }
+
+ // Ping event is sent upon initial setup of the webhook.
+ if github.WebHookType(r) == "ping" {
+ fmt.Fprintf(w, "pong")
+ return
+ }
+
+ id := r.Header.Get("X-GitHub-Delivery")
+ if id == "" {
+ fmt.Fprintf(os.Stderr, "X-GitHub-Delivery header not present\n")
+ http.Error(w, "X-GitHub-Delivery header not present", http.StatusBadRequest)
+ return
+ }
+
+ ctx := context.Background()
+ wc, err := newObjectWriter(ctx, id)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "Could not create bucket object writer: %v\n", err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ if _, err := wc.Write(b); err != nil {
+ fmt.Fprintf(os.Stderr, "Write: could not copy body to bucket object writer: %v\n", err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return
+ }
+ if err := wc.Close(); err != nil {
+ fmt.Fprintf(os.Stderr, "Close: could not copy body to bucket object writer: %v\n", err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ fmt.Fprintf(w, "Message ID: %s\n", id)
+}
+
+var newObjectWriter = func(ctx context.Context, id string) (io.WriteCloser, error) {
+ client, err := storage.NewClient(ctx)
+ if err != nil {
+ return nil, fmt.Errorf("storage.NewClient: %v", err)
+ }
+
+ wc := client.Bucket(bucket).Object(id + ".json").NewWriter(ctx)
+ wc.ContentType = "application/json"
+ return wc, nil
+}
diff --git a/cloudfns/issueswebhook/issueswebhook_test.go b/cloudfns/issueswebhook/issueswebhook_test.go
new file mode 100644
index 0000000..3bc8165
--- /dev/null
+++ b/cloudfns/issueswebhook/issueswebhook_test.go
@@ -0,0 +1,108 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package issueswebhook
+
+import (
+ "bytes"
+ "context"
+ "errors"
+ "io"
+ "io/ioutil"
+ "net/http/httptest"
+ "testing"
+)
+
+func TestWebHook(t *testing.T) {
+ testCases := []struct {
+ desc string
+ body []byte
+ headers map[string]string
+ newObjectWriterFn func(context.Context, string) (io.WriteCloser, error)
+ statusCode int
+ respBody []byte // only checked on 2xx
+ }{
+ {
+ desc: "ping event",
+ headers: map[string]string{
+ "X-GitHub-Event": "ping",
+ },
+ statusCode: 200,
+ respBody: []byte("pong"),
+ },
+ {
+ desc: "issues event",
+ body: []byte("body"),
+ headers: map[string]string{
+ "X-GitHub-Delivery": "42",
+ },
+ newObjectWriterFn: func(ctx context.Context, id string) (io.WriteCloser, error) {
+ return &testWriteCloser{}, nil
+ },
+ statusCode: 200,
+ respBody: []byte("Message ID: 42\n"),
+ },
+ {
+ desc: "error writing to GCS",
+ headers: map[string]string{
+ "X-GitHub-Delivery": "42",
+ },
+ newObjectWriterFn: func(ctx context.Context, id string) (io.WriteCloser, error) {
+ return &testWriteCloser{writeErr: errors.New("test error on Write")}, nil
+ },
+ statusCode: 500,
+ },
+ {
+ desc: "error closing GCS writer",
+ headers: map[string]string{
+ "X-GitHub-Delivery": "42",
+ },
+ newObjectWriterFn: func(ctx context.Context, id string) (io.WriteCloser, error) {
+ return &testWriteCloser{closeErr: errors.New("test error on Close")}, nil
+ },
+ statusCode: 500,
+ },
+ }
+
+ for _, tc := range testCases {
+ t.Run(tc.desc, func(t *testing.T) {
+ oldFn := newObjectWriter
+ defer func() { newObjectWriter = oldFn }()
+ newObjectWriter = tc.newObjectWriterFn
+
+ req := httptest.NewRequest("GET", "http://cloudfunctionz.com/func", bytes.NewReader(tc.body))
+ req.Header.Set("Content-Type", "application/json")
+ for k, v := range tc.headers {
+ req.Header.Set(k, v)
+ }
+ w := httptest.NewRecorder()
+ GitHubIssueChangeWebHook(w, req)
+
+ resp := w.Result()
+ body, err := ioutil.ReadAll(resp.Body)
+ if err != nil {
+ t.Errorf("ioutil.ReadAll: %v", err)
+ }
+ if got, want := resp.StatusCode, tc.statusCode; got != want {
+ t.Errorf("Unexpected status code: got %d; want %d", got, want)
+ }
+ if resp.StatusCode >= 200 && resp.StatusCode < 300 && !bytes.Equal(body, tc.respBody) {
+ t.Errorf("Unexpected body: got %q; want %q", body, tc.respBody)
+ }
+ })
+ }
+}
+
+type testWriteCloser struct {
+ writeErr error
+ closeErr error
+}
+
+func (wc *testWriteCloser) Write(b []byte) (int, error) {
+ return len(b), wc.writeErr
+}
+
+func (wc *testWriteCloser) Close() error {
+ return wc.closeErr
+}
