microservice-bcrypt.go

package main

import (
  "log"
  "net/http"
  "encoding/json"
  "golang.org/x/crypto/bcrypt"
)

type HashRequest struct {
  Password string `json:"password"`
}

type HashResponse struct {
  Result string `json:"result"`
}

type CompareRequest struct {
  Hash string `json:"hash"`
  Password string `json:"password"`
}

type CompareResponse struct {
  Result bool `json:"result"`
}

func main() {
  http.HandleFunc("/hash", hashHandler)
  http.HandleFunc("/compare", compareHandler)

  log.Fatal(http.ListenAndServe(":8080", nil))
}

func hashHandler(w http.ResponseWriter, r *http.Request) {
  if r.Method != "POST" {
    http.Error(w, r.Method+" not allowed", http.StatusMethodNotAllowed)
    return
  }

  req := HashRequest{}
  json.NewDecoder(r.Body).Decode(req)

  result, _ := bcrypt.GenerateFromPassword([]byte(req.Password), 10)

  res := HashResponse{string(result)}
  json.NewEncoder(w).Encode(res)
}

func compareHandler(w http.ResponseWriter, r *http.Request) {
  if r.Method != "POST" {
    http.Error(w, r.Method+" not allowed", http.StatusMethodNotAllowed)
    return
  }

  req := CompareRequest{}
  json.NewDecoder(r.Body).Decode(req)

  err := bcrypt.CompareHashAndPassword(
    []byte(req.Hash),
    []byte(req.Password),
  )

  res := CompareResponse{err == nil}
  json.NewEncoder(w).Encode(res)
}