├── Dockerfile
├── README.md
└── main.go


/Dockerfile:
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 1 | FROM golang:1.14.0 AS builder
 2 | 
 3 | WORKDIR /go/src/github.com/daime/http-dump
 4 | 
 5 | COPY main.go .
 6 | 
 7 | RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o http-dump .
 8 | 
 9 | FROM marcosmorelli/debian-base-image
10 | 
11 | WORKDIR /root/
12 | 
13 | COPY --from=0 /go/src/github.com/daime/http-dump/http-dump .
14 | 
15 | EXPOSE 8080
16 | 
17 | CMD ["./http-dump"]
18 | 


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/README.md:
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 1 | # http-dump
 2 | 
 3 | A simple go web server that dumps the request back to the client using 
 4 | go's [httputil.DumpRequest](https://golang.org/pkg/net/http/httputil/#DumpRequest)
 5 | function. It also logs the same http request output to stdout.
 6 | 
 7 | http-dump was created to help debugging communications between docker services 
 8 | within a docker compose.
 9 | 
10 | ## Usage
11 | 
12 | It's highly recommend to use http-dump docker image.
13 | 
14 | ```console
15 | $ docker run --rm -p "8080:8080" -it daime/http-dump:latest 
16 | ```
17 | 


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/main.go:
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 1 | package main
 2 | 
 3 | import (
 4 | 	"fmt"
 5 | 	"log"
 6 | 	"net/http"
 7 | 	"net/http/httputil"
 8 | 	"os"
 9 | )
10 | 
11 | var port = "8080"
12 | 
13 | func main() {
14 | 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
15 | 		d, err := httputil.DumpRequest(r, true)
16 | 		if err != nil {
17 | 			msg := fmt.Sprintf("couldn't dump request: %s", err)
18 | 			log.Printf(msg)
19 | 			http.Error(w, msg, http.StatusInternalServerError)
20 | 			return
21 | 		}
22 | 
23 | 		b := string(d)
24 | 
25 | 		log.Printf("request received:\n%s\n\n", b)
26 | 
27 | 		if _, err := fmt.Fprintf(w, b); err != nil {
28 | 			msg := fmt.Sprintf("couldn't write response: %s", err)
29 | 			log.Printf(msg)
30 | 			http.Error(w, msg, http.StatusInternalServerError)
31 | 			return
32 | 		}
33 | 	})
34 | 
35 | 	if p := os.Getenv("PORT"); p != "" {
36 | 		port = p
37 | 	}
38 | 
39 | 	addr := ":" + port
40 | 
41 | 	log.Printf("http-dump is listening at %s\n", addr)
42 | 	log.Fatal(http.ListenAndServe(addr, nil))
43 | }
44 | 


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