From 6f4e1e1795fe3c1d7857a39cd5d7ed18dee49796 Mon Sep 17 00:00:00 2001
From: Jason Hall <jasonhall@google.com>
Date: Wed, 5 Dec 2018 16:39:28 -0500
Subject: [PATCH] Add GAE app frontend to serve custom domain traffic

---
 fwd/.gcloudignore | 25 +++++++++++++++++++++++++
 fwd/app.go        | 32 ++++++++++++++++++++++++++++++++
 fwd/app.yaml      |  2 ++
 3 files changed, 59 insertions(+)
 create mode 100644 fwd/.gcloudignore
 create mode 100644 fwd/app.go
 create mode 100644 fwd/app.yaml

diff --git a/fwd/.gcloudignore b/fwd/.gcloudignore
new file mode 100644
index 0000000..199e6d9
--- /dev/null
+++ b/fwd/.gcloudignore
@@ -0,0 +1,25 @@
+# This file specifies files that are *not* uploaded to Google Cloud Platform
+# using gcloud. It follows the same syntax as .gitignore, with the addition of
+# "#!include" directives (which insert the entries of the given .gitignore-style
+# file at that point).
+#
+# For more information, run:
+#   $ gcloud topic gcloudignore
+#
+.gcloudignore
+# If you would like to upload your .git directory, .gitignore file or files
+# from your .gitignore file, remove the corresponding line
+# below:
+.git
+.gitignore
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+# Test binary, build with `go test -c`
+*.test
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
\ No newline at end of file
diff --git a/fwd/app.go b/fwd/app.go
new file mode 100644
index 0000000..4c2cb0e
--- /dev/null
+++ b/fwd/app.go
@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+)
+
+const appJunk = "https://app-j33hbo5ywa-uc.a.run.app"
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		req, err := http.NewRequest(r.Method, fmt.Sprintf("%s/%s", appJunk, r.URL.Path), nil)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		resp, err := http.DefaultClient.Do(req)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		for k, v := range resp.Header {
+			w.Header().Set(k, v[0])
+		}
+		w.WriteHeader(resp.StatusCode)
+		io.Copy(w, resp.Body)
+	})
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}
diff --git a/fwd/app.yaml b/fwd/app.yaml
new file mode 100644
index 0000000..1b7aec3
--- /dev/null
+++ b/fwd/app.yaml
@@ -0,0 +1,2 @@
+runtime: go111
+