Simple Restic REST backend build for testing purposes

server.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"
	"path/filepath"

	"github.com/codegangsta/negroni"
	"github.com/gorilla/mux"
	"github.com/restic/restic/backend"
	"gopkg.in/tylerb/graceful.v1"
)

func die(message string, args ...interface{}) {
	fmt.Fprintf(os.Stderr, message, args...)
	os.Exit(1)
}

// Simple Restic REST backend build for testing purposes
func main() {

	// Initializing a temporary repository
	path, err := ioutil.TempDir("", "restic-repository-")
	if err != nil {
		die("TempDir(): %v\n", err)
	}

	dirs := []string{
		path,
		filepath.Join(path, "data"),
		filepath.Join(path, "snapshot"),
		filepath.Join(path, "index"),
		filepath.Join(path, "lock"),
		filepath.Join(path, "key"),
		filepath.Join(path, "temp"),
	}

	for _, d := range dirs {
		fmt.Println(d)
		os.MkdirAll(d, backend.Modes.Dir)
	}

	// Routing the repository requests
	r := mux.NewRouter()

	// Exists
	r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		file := filepath.Join(path, "config")
		if _, err := os.Stat(file); err != nil {
			http.Error(w, "No repository here", 404)
		}
	}).Methods("HEAD")

	// List blobs
	r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		file := filepath.Join(path, "config")
		if _, err := os.Stat(file); err != nil {
			http.Error(w, "No repository here", 404)
		}
	}).Methods("GET")

	// Head file
	r.HandleFunc("/{file}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		file := filepath.Join(path, vars["file"])
		if _, err := os.Stat(file); err != nil {
			http.Error(w, "File not found", 404)
		}
	}).Methods("HEAD")

	// Get file
	r.HandleFunc("/{file}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		file := filepath.Join(path, vars["file"])
		if _, err := os.Stat(file); err == nil {
			bytes, _ := ioutil.ReadFile(file)
			w.Write(bytes)
		} else {
			http.Error(w, "File not found", 404)
		}
	}).Methods("GET")

	// Put file
	r.HandleFunc("/{file}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		file := filepath.Join(path, vars["file"])
		if _, err := os.Stat(file); err == nil {
			fmt.Fprintf(w, "Blob already uploaded", 404)
		} else {
			bytes, _ := ioutil.ReadAll(r.Body)
			ioutil.WriteFile(file, bytes, 0600)

		}
	}).Methods("POST")

	// Delete file
	r.HandleFunc("/{file}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		file := filepath.Join(path, vars["file"])
		if _, err := os.Stat(file); err == nil {
			os.Remove(file)
		} else {
			fmt.Fprintf(w, "File not found", 404)
		}
	}).Methods("DELETE")

	// List blobs
	r.HandleFunc("/{type}/", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		path := filepath.Join(path, vars["type"])
		files, _ := ioutil.ReadDir(path)
		names := make([]string, len(files))
		for i, f := range files {
			names[i] = f.Name()
		}
		data, _ := json.Marshal(names)
		w.Write(data)
	}).Methods("GET")

	// Head blob
	r.HandleFunc("/{type}/{blob}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		blob := filepath.Join(path, vars["type"], vars["blob"])
		if _, err := os.Stat(blob); err != nil {
			http.Error(w, "File not found", 404)
		}
	}).Methods("HEAD")

	// Get blob
	r.HandleFunc("/{type}/{blob}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		blob := filepath.Join(path, vars["type"], vars["blob"])
		if _, err := os.Stat(blob); err == nil {
			bytes, _ := ioutil.ReadFile(blob)
			w.Write(bytes)
		} else {
			http.Error(w, "Blob not found", 404)
		}
	}).Methods("GET")

	// Put blob
	r.HandleFunc("/{type}/{blob}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		blob := filepath.Join(path, vars["type"], vars["blob"])
		if _, err := os.Stat(blob); err == nil {
			fmt.Fprintf(w, "Blob already uploaded", 404)
		} else {
			bytes, _ := ioutil.ReadAll(r.Body)
			ioutil.WriteFile(blob, bytes, 0600)

		}
	}).Methods("POST")

	// Delete blob
	r.HandleFunc("/{type}/{blob}", func(w http.ResponseWriter, r *http.Request) {
		vars := mux.Vars(r)
		blob := filepath.Join(path, vars["type"], vars["blob"])
		if _, err := os.Stat(blob); err == nil {
			os.Remove(blob)
		} else {
			fmt.Fprintf(w, "Blob not found", 404)
		}
	}).Methods("DELETE")

	// Starting the http server
	n := negroni.Classic()
	n.UseHandler(r)
	n.Run(":8000")
	graceful.Run(addr, 5*time.Second, n)
}