gateway 0.01

gateway/.gitignore

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+gateway

gateway/Dockerfile

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+from golang:1.7.3
+
+RUN go get -d github.com/docker/docker/api/types \
+ && go get -d github.com/docker/docker/api/types/filters \
+  && go get -d github.com/docker/docker/api/types/swarm \
+   && go get -d github.com/docker/docker/client
+
+WORKDIR /go/src/app/
+RUN go get github.com/gorilla/mux
+COPY server.go .
+RUN go build
+EXPOSE 8080
+
+CMD ["./app"]
+

gateway/server.go

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+package main
+
+import (
+	"bytes"
+	"log"
+	"net/http"
+
+	"io/ioutil"
+
+	"strconv"
+
+	"github.com/gorilla/mux"
+)
+
+func proxy(w http.ResponseWriter, r *http.Request) {
+	if r.Method == "POST" {
+		log.Println(r.Header)
+		header := r.Header["X-Function"]
+		log.Println(header)
+		if header[0] == "catservice" {
+			// client := http.Client{Timeout: time.Second * 2}
+			requestBody, _ := ioutil.ReadAll(r.Body)
+			buf := bytes.NewBuffer(requestBody)
+
+			response, err := http.Post("http://"+header[0]+":"+strconv.Itoa(8080)+"/", "text/plain", buf)
+			if err != nil {
+				log.Fatalln(err)
+			}
+			responseBody, _ := ioutil.ReadAll(response.Body)
+			w.Write(responseBody)
+
+		}
+	}
+}
+
+func main() {
+	r := mux.NewRouter()
+	r.HandleFunc("/", proxy)
+	log.Fatal(http.ListenAndServe(":8080", r))
+}