Initial API

Signed-off-by: Knut Ahlers <knut@ahlers.me>

.gitignore

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+ots

CONTRIBUTING.md

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+# Contributing to this project
+
+Contributions are encouraged and welcome. Thank you very much for taking your time to contribute!
+
+## Code of Conduct
+This project adheres to the [Contributor Covenant code of conduct](http://contributor-covenant.org/version/1/4/). By participating, you are expected to uphold this code. Please report unacceptable behavior to the [project maintainer](mailto:help@luzifer.io).
+
+## Developer Certificate of Origin
+Please also review the [Developer Certificate of Origin](https://developercertificate.org/). All commits must be signed off using `git commit -s` to indicate you've read the document and your contribution meets the criteria defined in it.

LICENSE

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+

api.go

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+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+type apiServer struct {
+	store storage
+}
+
+func newAPI(s storage) *apiServer {
+	return &apiServer{
+		store: s,
+	}
+}
+
+func (a apiServer) Register(r *mux.Router) {
+	r.HandleFunc("/create", a.handleCreate)
+	r.HandleFunc("/get/{id}", a.handleRead)
+}
+
+func (a apiServer) handleCreate(res http.ResponseWriter, r *http.Request) {
+	secret := r.FormValue("secret")
+	if secret == "" {
+		a.jsonResponse(res, http.StatusBadRequest, map[string]interface{}{
+			"success": false,
+			"error":   "Secret missing",
+		})
+		return
+	}
+
+	id, err := a.store.Create(secret)
+	if err != nil {
+		a.jsonResponse(res, http.StatusInternalServerError, map[string]interface{}{
+			"success": false,
+			"error":   err.Error(),
+		})
+		return
+	}
+
+	a.jsonResponse(res, http.StatusCreated, map[string]interface{}{
+		"success":   true,
+		"secret_id": id,
+	})
+}
+
+func (a apiServer) handleRead(res http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	id := vars["id"]
+	if id == "" {
+		a.jsonResponse(res, http.StatusBadRequest, map[string]interface{}{
+			"success": false,
+			"error":   "ID missing",
+		})
+		return
+	}
+
+	secret, err := a.store.ReadAndDestroy(id)
+	if err != nil {
+		a.jsonResponse(res, http.StatusInternalServerError, map[string]interface{}{
+			"success": false,
+			"error":   err.Error(),
+		})
+		return
+	}
+
+	a.jsonResponse(res, http.StatusOK, map[string]interface{}{
+		"success": true,
+		"secret":  secret,
+	})
+}
+
+func (a apiServer) jsonResponse(res http.ResponseWriter, status int, response map[string]interface{}) {
+	res.Header().Set("Content-Type", "application/json")
+	res.Header().Set("Cache-Control", "no-cache")
+	res.WriteHeader(status)
+
+	json.NewEncoder(res).Encode(response)
+}

main.go

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+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/Luzifer/rconfig"
+	"github.com/gorilla/mux"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	cfg struct {
+		Listen         string `flag:"listen" default:":3000" description:"IP/Port to listen on"`
+		LogLevel       string `flag:"log-level" default:"info" description:"Set log level (debug, info, warning, error)"`
+		StorageType    string `flag:"storage-type" default:"mem" description:"Storage to use for putting secrets to" validate:"nonzero"`
+		VersionAndExit bool   `flag:"version" default:"false" description:"Print version information and exit"`
+	}
+
+	product = "ots"
+	version = "dev"
+)
+
+func init() {
+	if err := rconfig.ParseAndValidate(&cfg); err != nil {
+		log.Fatalf("Error parsing CLI arguments: %s", err)
+	}
+
+	if l, err := log.ParseLevel(cfg.LogLevel); err == nil {
+		log.SetLevel(l)
+	} else {
+		log.Fatalf("Invalid log level: %s", err)
+	}
+
+	if cfg.VersionAndExit {
+		fmt.Printf("%s %s\n", product, version)
+		os.Exit(0)
+	}
+}
+
+func main() {
+	store, err := getStorageByType(cfg.StorageType)
+	if err != nil {
+		log.Fatalf("Could not initialize storage: %s", err)
+	}
+	api := newAPI(store)
+
+	r := mux.NewRouter()
+	api.Register(r.PathPrefix("/api").Subrouter())
+
+	log.Fatalf("HTTP server quit: %s", http.ListenAndServe(cfg.Listen, r))
+}

storage.go

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+package main
+
+import (
+	"errors"
+	"fmt"
+)
+
+var errSecretNotFound = errors.New("Secret not found")
+
+type storage interface {
+	Create(secret string) (string, error)
+	ReadAndDestroy(id string) (string, error)
+}
+
+func getStorageByType(t string) (storage, error) {
+	switch t {
+	case "mem":
+		return newStorageMem(), nil
+	case "redis":
+		return newStorageRedis()
+	default:
+		return nil, fmt.Errorf("Storage type %q not found", t)
+	}
+}

storage_mem.go

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+package main
+
+import "github.com/satori/uuid"
+
+type storageMem struct {
+	store map[string]string
+}
+
+func newStorageMem() storage {
+	return &storageMem{
+		store: make(map[string]string),
+	}
+}
+
+func (s storageMem) Create(secret string) (string, error) {
+	id := uuid.NewV4().String()
+	s.store[id] = secret
+
+	return id, nil
+}
+
+func (s storageMem) ReadAndDestroy(id string) (string, error) {
+	secret, ok := s.store[id]
+	if !ok {
+		return "", errSecretNotFound
+	}
+
+	delete(s.store, id)
+	return secret, nil
+}

storage_redis.go

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+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/satori/uuid"
+	"github.com/xuyu/goredis"
+)
+
+type storageRedis struct {
+	conn *goredis.Redis
+}
+
+func newStorageRedis() (storage, error) {
+	if os.Getenv("REDIS_URL") == "" {
+		return nil, fmt.Errorf("REDIS_URL environment variable not set")
+	}
+
+	c, err := goredis.DialURL(os.Getenv("REDIS_URL"))
+	if err != nil {
+		return nil, err
+	}
+
+	return &storageRedis{
+		conn: c,
+	}, nil
+}
+
+func (s storageRedis) redisKey() string {
+	key := os.Getenv("REDIS_KEY")
+	if key == "" {
+		key = "io.luzifer.ots"
+	}
+
+	return key
+}
+
+func (s storageRedis) Create(secret string) (string, error) {
+	id := uuid.NewV4().String()
+	_, err := s.conn.HSet(s.redisKey(), id, secret)
+
+	return id, err
+}
+
+func (s storageRedis) ReadAndDestroy(id string) (string, error) {
+	secret, err := s.conn.HGet(s.redisKey(), id)
+	if err != nil {
+		return "", err
+	}
+
+	_, err = s.conn.HDel(s.redisKey(), id)
+	return string(secret), err
+}