🎉 Init commit

.github/workflows/build.yaml

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+name: Build and Push Container
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  IMAGE_BASENAME: 'go-netbox-proxy'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-go@v2
+
+
+      # Required for docker/build-push-action
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ secrets.ACR_LOGIN_SERVER }}
+          username: ${{ secrets.ACR_USERNAME }}
+          password: ${{ secrets.ACR_PASSWORD }}
+
+      - name: Determine Image Tags
+        id: tags
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ secrets.ACR_LOGIN_SERVER }}/${{ env.IMAGE_BASENAME }}
+          sep-tags: ','
+          flavor: |
+            latest=false
+          tags: |
+            type=ref,event=pr
+            type=sha,enable=${{ github.event_name == 'push' }},prefix=${{ github.event.repository.default_branch }}-${{ github.run_number }}-
+
+      - name: Build and Push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          file: Dockerfile
+          tags: ${{ steps.tags.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/release.yaml

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+
+name: Tag and Push Container on Release
+
+on:
+  push:
+    tags:
+      - v**
+
+env:
+  IMAGE_BASENAME: 'go-netbox-proxy'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-go@v2
+
+
+      # Required for docker/build-push-action
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ secrets.ACR_LOGIN_SERVER }}
+          username: ${{ secrets.ACR_USERNAME }}
+          password: ${{ secrets.ACR_PASSWORD }}
+
+      - name: Determine Image Tags
+        id: tags
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ secrets.ACR_LOGIN_SERVER }}/${{ env.IMAGE_BASENAME }}
+          sep-tags: ','
+          flavor: |
+            latest=false
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+
+      - name: Build and Push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          file: Dockerfile
+          tags: ${{ steps.tags.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

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+# Start by building the application.
+FROM golang:1.18.2-buster as build
+
+WORKDIR /go/src/go-netbox-proxy
+COPY . /go/src/go-netbox-proxy
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags '-w -extldflags "-static"' -o /go/bin/go-netbox-proxy
+
+# Now copy it into our base image.
+FROM gcr.io/distroless/static:latest-amd64
+COPY --from=build /go/bin/go-netbox-proxy /
+
+CMD ["/go-netbox-proxy"]

go.mod

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+module github.com/riege/go-netbox-proxy
+
+go 1.18

main.go

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+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+type HttpHandler struct{}
+var upstream *url.URL
+
+func (h *HttpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+
+	r.Host = upstream.Host
+	r.URL.Scheme = upstream.Scheme
+	proxy := httputil.NewSingleHostReverseProxy(upstream)
+	proxy.ModifyResponse = func(r *http.Response) error {
+
+		if strings.Contains(r.Request.URL.Path, "/api/") {
+
+			// Read the response body
+			b, _ := ioutil.ReadAll(r.Body)
+
+			// Compile the regex
+			var re = regexp.MustCompile(`"created":".+(T.+Z)",`)
+
+			// Replace the current created datetime by a fake date
+			b = re.ReplaceAllFunc(b, func(s []byte) []byte {
+				return []byte(`"created":"2020-01-01",`)
+			})
+			buf := bytes.NewBuffer(b)
+
+			// Replace the body with our new body
+			r.Body = ioutil.NopCloser(buf)
+			// Set the content length
+			r.Header["Content-Length"] = []string{fmt.Sprint(buf.Len())}
+			// Set Proxy Header
+			r.Header.Set("X-Proxy", "go-netbox-proxy 1.0")
+			return nil
+		}
+
+		return nil
+	}
+	// Serve request
+	proxy.ServeHTTP(w, r)
+
+}
+
+func main() {
+
+	// Parse flags
+	addr := flag.String("addr", ":8080", "proxy listen address")
+	up := flag.String("upstream", "", "upstream http address")
+	flag.Parse()
+
+	// Parse upstream url
+	parsedUpstream, err := url.Parse(*up)
+
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+
+	// Set upstream
+	upstream = parsedUpstream
+
+	// Setup the reverse proxy server
+	httpHandler := &HttpHandler{}
+	http.Handle("/", httpHandler)
+	err = http.ListenAndServe(*addr, nil)
+
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+
+}