feat: first version

.vscode/launch.json

+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Launch",
+      "type": "go",
+      "request": "launch",
+      "mode": "auto",
+      "program": "${workspaceFolder}/main.go",
+      "env": {},
+      "args": ["-http_port=8080"]
+    }
+  ]
+}

Dockerfile

+# Building...
+
+FROM golang:alpine as server-builder
+
+WORKDIR /server
+
+RUN apk update && apk upgrade && \
+    apk add --no-cache bash git openssh build-base
+ADD . .
+RUN go get -d -v && \
+    go test ./... && \
+    go build -o server
+
+# Running...
+
+FROM alpine
+
+WORKDIR /app
+
+RUN apk update && apk add ca-certificates libcap
+# ca-certificates for autocert (Let's Encrypt) and mailcap to get mime types for downloaded documents
+
+COPY --from=server-builder /server/server /app
+
+RUN setcap cap_net_bind_service=+ep server
+
+ENTRYPOINT [ "./server"]

docker-compose.yml

+version: "2.4"
+
+services:
+  cozy-oauth-proxy:
+    image: registry.forge.grandlyon.com/pocs/cozy/cozy-oauth-proxy
+    #image: cozy-oauth-proxy
+    container_name: cozy-oauth-proxy
+    restart: unless-stopped
+    mem_limit: 512m
+    user: "1000"
+    command: -http_port=8081
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+    ports:
+      - 8081:8081

go.mod

+module forge.grandlyon.com/pocs/cozy/cozy-oauth-proxy
+
+go 1.13

main.go

+package main
+
+import (
+	"flag"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+var (
+	httpPort = flag.Int("http_port", 80, "HTTP port to serve on (defaults to 80)")
+)
+
+func main() {
+	// Parse the flags
+	flag.Parse()
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		query := r.URL.Query()
+		state := strings.Split(query.Get("state"), "-")[0]
+		host := r.Host
+		redir := "http://" + host + state
+		http.Redirect(w, r, redir, 302)
+	})
+
+	http.ListenAndServe(":"+strconv.Itoa(*httpPort), mux)
+}