Write and read file directly

api.go

@@ -1,28 +1,22 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
-	"io"
 	"io/ioutil"
 	"log"
 	"net/http"
-	"os"
 
 	"github.com/gorilla/mux"
 )
 
 func StyleFileAccessor(filename string) styleFileAccessor {
-	file, err := os.OpenFile(filename, os.O_RDWR, 0666)
+	return styleFileAccessor{filename, styleId(filename)}
-	if err != nil {
-		log.Fatalf("Can not access style file: %s", err.Error())
-	}
-
-	return styleFileAccessor{file, styleId(file)}
 }
 
-func styleId(file *os.File) string {
+func styleId(filename string) string {
-	raw, err := ioutil.ReadAll(file)
+	raw, err := ioutil.ReadFile(filename)
 	if err != nil {
 		log.Panicln(err)
 	}
@@ -45,8 +39,8 @@ type styleSpec struct {
 
 // Allows access to a single style file
 type styleFileAccessor struct {
-	file *os.File
+	filename string
-	id   string
+	id       string
 }
 
 func (fa styleFileAccessor) ListFiles(w http.ResponseWriter, r *http.Request) {
@@ -62,10 +56,12 @@ func (fa styleFileAccessor) ReadFile(w http.ResponseWriter, r *http.Request) {
 	//TODO: Choose right file
 	// right now we just return the single file we know of
 	w.Header().Set("Content-Type", "application/json")
-	fa.file.Seek(0, 0)
+
-	if _, err := io.Copy(w, fa.file); err != nil {
+	raw, err := ioutil.ReadFile(fa.filename)
-		log.Fatalf("Can not copy from file to request: %s", err.Error())
+	if err != nil {
+		log.Panicln(err)
 	}
+	w.Write(raw)
 }
 
 func (fa styleFileAccessor) SaveFile(w http.ResponseWriter, r *http.Request) {
@@ -75,7 +71,11 @@ func (fa styleFileAccessor) SaveFile(w http.ResponseWriter, r *http.Request) {
 	//TODO: Save to right file
 	w.Header().Set("Content-Type", "application/json")
 
-	if _, err := io.Copy(fa.file, r.Body); err != nil {
+	body, _ := ioutil.ReadAll(r.Body)
+	var out bytes.Buffer
+	json.Indent(&out, body, "", "  ")
+
+	if err := ioutil.WriteFile(fa.filename, out.Bytes(), 0666); err != nil {
 		log.Fatalf("Can not copy from request to file: %s", err.Error())
 	}
 }