Initial version

.drone.yml

@@ -0,0 +1,21 @@
+kind: pipeline
+name: default
+type: docker
+
+steps:
+  - name: publish
+    image: plugins/docker
+    settings:
+      username: nologin
+      password:
+        from_secret: docker_password
+      repo: rg.fr-par.scw.cloud/jlelse/proxyexposer
+      registry: rg.fr-par.scw.cloud/jlelse
+      tags: latest
+      mirror: https://mirror.gcr.io
+
+trigger:
+  branch:
+    - master
+  event:
+    - push

Dockerfile

@@ -0,0 +1,9 @@
+FROM golang:1.17-alpine3.14 as build
+WORKDIR /app
+ADD *.go go.mod /app/
+RUN go build -ldflags '-w -s' -o proxyexposer
+
+FROM alpine:3.14
+WORKDIR /app
+CMD ["proxyexposer"]
+COPY --from=build /app/proxyexposer /bin/

go.mod

@@ -0,0 +1,3 @@
+module git.jlel.se/jlelse/ProxyExposer
+
+go 1.17

main.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"os"
+	"strconv"
+)
+
+func main() {
+
+	proxy := os.Getenv("PE_PROXY")
+	if proxy == "" {
+		log.Fatal("PE_PROXY not specified")
+		return
+	}
+	proxyUrl, err := url.Parse(proxy)
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+
+	upstream := os.Getenv("PE_UPSTREAM")
+	if upstream == "" {
+		log.Fatal("PE_UPSTREAM not specified")
+		return
+	}
+	upstreamUrl, err := url.Parse(upstream)
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+
+	portString := os.Getenv("PE_PORT")
+	if portString == "" {
+		log.Fatal("PE_PORT not specified")
+		return
+	}
+
+	port, err := strconv.Atoi(portString)
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+
+	rp := httputil.NewSingleHostReverseProxy(upstreamUrl)
+	rp.Transport = &http.Transport{
+		Proxy: http.ProxyURL(proxyUrl),
+	}
+	err = http.ListenAndServe(":"+strconv.Itoa(port), rp)
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+
+}