✨ Linter to CI

Reviewed-on: #34

.env

@@ -1,7 +1,6 @@
-PLAKKEN_INTERFACE=0.0.0.0
+PLAKKEN_LISTEN=:3000
-PLAKKEN_PORT=3000
+PLAKKEN_REDIS_ADDRESS=localhost:6379
-PLAKKEN_REDIS_ADDR=localhost:6379
 PLAKKEN_REDIS_USER=
 PLAKKEN_REDIS_PASSWORD=
 PLAKKEN_REDIS_DB=0
-PLAKKEN_REDIS_URL_LEN=5
+PLAKKEN_URL_LENGTH=5

.gitignore

@@ -1,3 +1,7 @@
+# IDE specific
+.idea
+.vscode
+
 ### Go ###
 *.exe
 *.exe~

.woodpecker/build.yaml

@@ -0,0 +1,32 @@
+steps:
+  - name: publish_image
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      repo: git.gnous.eu/${CI_REPO_OWNER}/plakken
+      dockerfile: docker/Dockerfile
+      platforms: linux/amd64,linux/arm64/v8,linux/arm
+      registry: https://git.gnous.eu
+      tag: ${CI_COMMIT}
+      username:
+          from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      branch: ${CI_REPO_DEFAULT_BRANCH}
+      event: push
+  - name: publish_image_tag
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      repo: git.gnous.eu/${CI_REPO_OWNER}/plakken
+      dockerfile: docker/Dockerfile
+      platforms: linux/amd64,linux/arm64/v8,linux/arm
+      registry: https://git.gnous.eu
+      tags:
+        - ${CI_COMMIT_TAG##v} # Remove v from tag
+        - stable
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event: tag

.woodpecker/lint.yml

@@ -0,0 +1,5 @@
+steps:
+  lint:
+    image: golangci/golangci-lint
+    commands:
+      - golangci-lint run

.woodpecker/release.yaml

@@ -0,0 +1,24 @@
+steps:
+  - name: Build
+    image: golang:1.22
+    commands:
+      - go mod download
+      - CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-w -s" -o plakken-linux-amd64 # Enable static binary, target Linux, remove debug information and strip binary
+      - CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags "-w -s" -o plakken-linux-arm64
+      - CGO_ENABLED=0 GOOS=linux GOARCH=arm go build -ldflags "-w -s" -o plakken-linux-arm
+      - CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-w -s" -o plakken-windows-amd64.exe
+      - CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags "-w -s" -o plakken-windows-arm64.exe
+      - CGO_ENABLED=0 GOOS=linux GOARCH=arm go build -ldflags "-w -s" -o plakken-windows-arm.exe
+    when:
+      event: tag
+  - name: Release
+    image: woodpeckerci/plugin-gitea-release
+    settings:
+      base_url: https://git.gnous.eu
+      files:
+        - "plakken*"
+      api_key:
+        from_secret: release_token
+      target: main
+    when:
+      event: tag

config.go

@@ -1,54 +0,0 @@
-package main
-
-import (
-	"github.com/joho/godotenv"
-	"log"
-	"os"
-	"strconv"
-)
-
-type Config struct {
-	host          string
-	port          string
-	redisAddr     string
-	redisUser     string
-	redisPassword string
-	redisDB       int
-	urlLength     int
-}
-
-func GetConfig() Config {
-	err := godotenv.Load()
-	if err != nil {
-		log.Fatalf("Error loading .env file: %v", err)
-	}
-
-	port := os.Getenv("PLAKKEN_PORT")
-	redisAddr := os.Getenv("PLAKKEN_REDIS_ADDR")
-	db := os.Getenv("PLAKKEN_REDIS_DB")
-	uLen := os.Getenv("PLAKKEN_REDIS_URL_LEN")
-
-	if port == "" || redisAddr == "" {
-		log.Fatal("Missing or invalid PLAKKEN_PORT or PLAKKEN_REDIS_ADDR")
-	}
-
-	redisDB, err := strconv.Atoi(db)
-	if err != nil {
-		log.Fatal("Invalid PLAKKEN_REDIS_DB")
-	}
-
-	urlLen, err := strconv.Atoi(uLen)
-	if err != nil {
-		log.Fatal("Invalid PLAKKEN_REDIS_URL_LEN")
-	}
-
-	return Config{
-		host:          os.Getenv("PLAKKEN_INTERFACE"),
-		port:          port,
-		redisAddr:     redisAddr,
-		redisUser:     os.Getenv("PLAKKEN_REDIS_USER"),
-		redisPassword: os.Getenv("PLAKKEN_REDIS_PASSWORD"),
-		redisDB:       redisDB,
-		urlLength:     urlLen,
-	}
-}

db.go

@@ -1,51 +0,0 @@
-package main
-
-import (
-	"context"
-	"github.com/redis/go-redis/v9"
-	"log"
-	"time"
-)
-
-var ctx = context.Background()
-
-func ConnectDB() *redis.Client {
-	localDb := redis.NewClient(&redis.Options{
-		Addr:     currentConfig.redisAddr,
-		Username: currentConfig.redisUser,
-		Password: currentConfig.redisPassword,
-		DB:       currentConfig.redisDB,
-	})
-	return localDb
-}
-
-func insertPaste(key string, content string, secret string, ttl time.Duration) {
-	type dbSchema struct {
-		content string
-		secret  string
-	}
-
-	hash := dbSchema{
-		content: content,
-		secret:  secret,
-	}
-	err := db.HSet(ctx, key, "content", hash.content)
-	if err != nil {
-		log.Println(err)
-	}
-	err = db.HSet(ctx, key, "secret", hash.secret)
-	if ttl > -1 {
-		db.Do(ctx, key, ttl)
-	}
-}
-
-func getContent(key string) string {
-	return db.HGet(ctx, key, "content").Val()
-}
-
-func deleteContent(key string) {
-	err := db.Del(ctx, key)
-	if err != nil {
-		log.Println(err)
-	}
-}

docker/Dockerfile

@@ -0,0 +1,28 @@
+# Build
+FROM golang:1.22 AS build
+LABEL authors="gnousEU"
+
+WORKDIR /build
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY main.go ./
+COPY internal/ ./internal
+COPY static/ ./static
+COPY templates/ ./templates
+
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags "-w -s" # Enable static binary, target Linux, remove debug information and strip binary
+
+# Copy to our image
+FROM gcr.io/distroless/static-debian12:nonroot
+
+WORKDIR /app
+
+COPY --from=build /build/plakken ./
+
+ENV PLAKKEN_LISTEN ":3000"
+
+EXPOSE 3000/tcp
+
+ENTRYPOINT ["/app/plakken"]

docker/docker-compose.dev.yaml

@@ -0,0 +1,31 @@
+version: "3"
+
+networks:
+  plakken:
+    external: false
+
+services:
+  server:
+    build:
+      context: ../
+      dockerfile: docker/Dockerfile
+    restart: always
+    container_name: plakken
+    networks:
+      - plakken
+    ports:
+      - "3000:3000"
+    environment:
+      - PLAKKEN_REDIS_ADDRESS=redis:6379
+      - POSTGRES_PASSWORD=gitea
+      - PLAKKEN_REDIS_DB=0
+      - PLAKKEN_URL_LENGTH=5
+    depends_on:
+      - redis
+  redis:
+    image: redis:7-alpine
+    restart: always
+    healthcheck:
+      test: [ "CMD", "redis-cli", "ping" ]
+    networks:
+      - plakken

docker/docker-compose.yaml

@@ -0,0 +1,36 @@
+version: "3"
+
+networks:
+  plakken:
+    external: false
+
+volumes:
+  redis:
+    driver: local
+
+services:
+  server:
+    image: git.gnous.eu/gnouseu/plakken:latest
+    restart: always
+    container_name: plakken
+    read_only: true
+    networks:
+      - plakken
+    ports:
+      - "3000:3000"
+    environment:
+      - PLAKKEN_REDIS_ADDRESS=redis:6379
+      - POSTGRES_PASSWORD=gitea
+      - PLAKKEN_REDIS_DB=0
+      - PLAKKEN_URL_LENGTH=5
+    depends_on:
+      - redis
+  redis:
+    image: redis:7-alpine
+    restart: always
+    healthcheck:
+      test: [ "CMD", "redis-cli", "ping" ]
+    networks:
+      - plakken
+    volumes:
+      - redis:/data

go.mod

@@ -1,13 +1,14 @@
-module plakken
+module git.gnous.eu/gnouseu/plakken
 
-go 1.21
+go 1.22
 
 require (
-	github.com/joho/godotenv v1.5.1
+	github.com/redis/go-redis/v9 v9.5.1
-	github.com/redis/go-redis/v9 v9.2.1
+	golang.org/x/crypto v0.21.0
 )
 
 require (
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	golang.org/x/sys v0.18.0 // indirect
 )

go.sum

@@ -1,8 +1,14 @@
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
-github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/redis/go-redis/v9 v9.5.1 h1:H1X4D3yHPaYrkL5X06Wh6xNVM/pX0Ft4RV0vMGvLBh8=
-github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/redis/go-redis/v9 v9.5.1/go.mod h1:hdY0cQFCN4fnSYT6TkisLufl/4W5UIXyv0b/CLO2V2M=
-github.com/redis/go-redis/v9 v9.2.1 h1:WlYJg71ODF0dVspZZCpYmoF1+U1Jjk9Rwd7pq6QmlCg=
+golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
-github.com/redis/go-redis/v9 v9.2.1/go.mod h1:hdY0cQFCN4fnSYT6TkisLufl/4W5UIXyv0b/CLO2V2M=
+golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
+golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
+golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

internal/config/config.go

@@ -0,0 +1,52 @@
+package config
+
+import (
+	"log"
+	"os"
+	"strconv"
+)
+
+// InitConfig Structure for program initialisation
+type InitConfig struct {
+	ListenAddress string
+	RedisAddress  string
+	RedisUser     string
+	RedisPassword string
+	RedisDB       int
+	UrlLength     uint8
+}
+
+// GetConfig Initialise configuration form .env
+func GetConfig() InitConfig {
+	listenAddress := os.Getenv("PLAKKEN_LISTEN")
+	redisAddress := os.Getenv("PLAKKEN_REDIS_ADDRESS")
+	db := os.Getenv("PLAKKEN_REDIS_DB")
+	uLen := os.Getenv("PLAKKEN_URL_LENGTH")
+
+	if listenAddress == "" || redisAddress == "" {
+		log.Fatal("Missing or invalid listenAddress or PLAKKEN_REDIS_ADDRESS")
+	}
+
+	redisDB, err := strconv.Atoi(db)
+	if err != nil {
+		log.Fatal("Invalid PLAKKEN_REDIS_DB")
+	}
+
+	urlLength, err := strconv.Atoi(uLen)
+	if err != nil {
+		log.Fatal("Invalid PLAKKEN_URL_LENGTH")
+	}
+
+	if urlLength > 255 {
+		log.Fatal("PLAKKEN_URL_LENGTH cannot be greater than 255")
+	}
+
+	return InitConfig{
+		ListenAddress: listenAddress,
+		RedisAddress:  redisAddress,
+		RedisUser:     os.Getenv("PLAKKEN_REDIS_USER"),
+		RedisPassword: os.Getenv("PLAKKEN_REDIS_PASSWORD"),
+		RedisDB:       redisDB,
+		UrlLength:     uint8(urlLength),
+	}
+}

internal/constant/constants.go

@@ -0,0 +1,14 @@
+package constant
+
+import "time"
+
+const (
+	HTTPTimeout          = 3 * time.Second
+	ExpirationCurlCreate = 604800 * time.Second // Second in one week
+	TokenLength          = 32
+	ArgonSaltSize        = 16
+	ArgonMemory          = 64 * 1024
+	ArgonThreads         = 4
+	ArgonKeyLength       = 32
+	ArgonIterations      = 2
+)

internal/database/db.go

@@ -0,0 +1,81 @@
+package database
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"git.gnous.eu/gnouseu/plakken/internal/secret"
+	"github.com/redis/go-redis/v9"
+)
+
+type DBConfig struct {
+	DB *redis.Client
+}
+
+var ctx = context.Background()
+
+// InitDB initialise redis connection settings
+func InitDB(addr string, user string, password string, db int) *redis.Options {
+	DBConfig := &redis.Options{
+		Addr:     addr,
+		Username: user,
+		Password: password,
+		DB:       db,
+	}
+
+	return DBConfig
+}
+
+// ConnectDB make new database connection
+func ConnectDB(dbConfig *redis.Options) *redis.Client {
+	localDb := redis.NewClient(dbConfig)
+	return localDb
+}
+
+// Ping test connection to Redis database
+func Ping(db *redis.Client) error {
+	status := db.Ping(ctx)
+	if status.String() != "ping: PONG" {
+		return &pingError{}
+	}
+	return nil
+}
+
+func (config DBConfig) InsertPaste(key string, content string, secret string, ttl time.Duration) {
+	type dbSchema struct {
+		content string
+		secret  string
+	}
+
+	hash := dbSchema{
+		content: content,
+		secret:  secret,
+	}
+	err := config.DB.HSet(ctx, key, "content", hash.content).Err()
+	if err != nil {
+		log.Println(err)
+	}
+	err = config.DB.HSet(ctx, key, "secret", hash.secret).Err()
+	if err != nil {
+		log.Println(err)
+	}
+	if ttl > -1 {
+		config.DB.Expire(ctx, key, ttl)
+	}
+}
+
+func (config DBConfig) UrlExist(url string) bool {
+	return config.DB.Exists(ctx, url).Val() == 1
+}
+
+func (config DBConfig) VerifySecret(url string, token string) (bool, error) {
+	storedHash := config.DB.HGet(ctx, url, "secret").Val()
+
+	result, err := secret.VerifyPassword(token, storedHash)
+	if err != nil {
+		return false, err
+	}
+
+	return result, nil
+}

internal/database/error.go

@@ -0,0 +1,7 @@
+package database
+
+type pingError struct{}
+
+func (m *pingError) Error() string {
+	return "Connection to redis not work"
+}

internal/httpServer/server.go

@@ -0,0 +1,67 @@
+package httpServer
+
+import (
+	"embed"
+	"log"
+	"net/http"
+
+	"git.gnous.eu/gnouseu/plakken/internal/constant"
+	"git.gnous.eu/gnouseu/plakken/internal/web/plak"
+	"github.com/redis/go-redis/v9"
+)
+
+type ServerConfig struct {
+	HTTPServer *http.Server
+	UrlLength  uint8
+	DB         *redis.Client
+	Static     embed.FS
+	Templates  embed.FS
+}
+
+func (config ServerConfig) home(w http.ResponseWriter, _ *http.Request) {
+	index, err := config.Static.ReadFile("static/index.html")
+	if err != nil {
+		log.Println(err)
+	}
+	_, err = w.Write(index)
+	if err != nil {
+		log.Println(err)
+	}
+}
+
+// Configure HTTP router
+func (config ServerConfig) router() {
+	WebConfig := plak.WebConfig{
+		DB:        config.DB,
+		UrlLength: config.UrlLength,
+		Templates: config.Templates,
+	}
+	staticFiles := http.FS(config.Static)
+
+	http.HandleFunc("GET /{$}", config.home)
+	http.Handle("GET /static/{file}", http.FileServer(staticFiles))
+	http.HandleFunc("GET /{key}/{settings...}", WebConfig.View)
+	http.HandleFunc("POST /{$}", WebConfig.CurlCreate)
+	http.HandleFunc("POST /create/{$}", WebConfig.PostCreate)
+	http.HandleFunc("DELETE /{key}", WebConfig.DeleteRequest)
+}
+
+// Config Configure HTTP server
+func Config(listenAddress string) *http.Server {
+	server := &http.Server{
+		Addr:         listenAddress,
+		ReadTimeout:  constant.HTTPTimeout,
+		WriteTimeout: constant.HTTPTimeout,
+	}
+
+	return server
+}
+
+// Server Start HTTP server
+func (config ServerConfig) Server() {
+	log.Println("Listening on " + config.HTTPServer.Addr)
+
+	config.router()
+
+	log.Fatal(config.HTTPServer.ListenAndServe())
+}

internal/secret/crypto.go

@@ -0,0 +1,147 @@
+// Package secret implement all crypto utils like password hashing and secret generation
+package secret
+
+import (
+	"bytes"
+	"crypto/rand"
+	"encoding/base64"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"git.gnous.eu/gnouseu/plakken/internal/constant"
+	"golang.org/x/crypto/argon2"
+)
+
+type argon2idHash struct {
+	salt []byte
+	hash []byte
+}
+
+// Argon2id config
+type config struct {
+	saltLength uint8
+	memory     uint32
+	threads    uint8
+	keyLength  uint32
+	iterations uint32
+}
+
+// generateSecret for password hashing or token generation
+func generateSecret(length uint8) ([]byte, error) {
+	secret := make([]byte, length)
+
+	_, err := rand.Read(secret)
+	if err != nil {
+		return nil, err
+	}
+
+	return secret, err
+}
+
+// GenerateToken generate hexadecimal token
+func GenerateToken() (string, error) {
+	secret, err := generateSecret(constant.TokenLength)
+	if err != nil {
+		return "", err
+	}
+
+	token := fmt.Sprintf("%x", secret)
+
+	return token, nil
+}
+
+// generateArgon2ID Generate an argon2id hash from source string and specified salt
+func (config config) generateArgon2ID(source string, salt []byte) []byte {
+	hash := argon2.IDKey([]byte(source), salt, config.iterations, config.memory, config.threads, config.keyLength)
+
+	return hash
+}
+
+// Password hash a source string with argon2id, return properly encoded hash
+func Password(password string) (string, error) {
+	config := config{
+		saltLength: constant.ArgonSaltSize,
+		memory:     constant.ArgonMemory,
+		threads:    constant.ArgonThreads,
+		keyLength:  constant.ArgonKeyLength,
+		iterations: constant.ArgonIterations,
+	}
+
+	salt, err := generateSecret(config.saltLength)
+	if err != nil {
+		return "", err
+	}
+
+	hash := config.generateArgon2ID(password, salt)
+
+	base64Hash := base64.RawStdEncoding.EncodeToString(hash)
+	base64Salt := base64.RawStdEncoding.EncodeToString(salt)
+
+	formatted := fmt.Sprintf("$argon2id$v=%d$m=%d,t=%d,p=%d$%s$%s", argon2.Version, config.memory, config.iterations, config.threads, base64Salt, base64Hash)
+
+	return formatted, nil
+}
+
+// VerifyPassword check is source password and stored password is similar, take password and a properly encoded hash.
+func VerifyPassword(password string, hash string) (bool, error) {
+	argon2Hash, config, err := parseHash(hash)
+	if err != nil {
+		return false, err
+	}
+
+	result := config.generateArgon2ID(password, argon2Hash.salt)
+
+	return bytes.Equal(result, argon2Hash.hash), nil
+}
+
+// parseHash parse existing encoded argon2id string
+func parseHash(source string) (argon2idHash, config, error) {
+	separateItem := strings.Split(source, "$")
+	if len(separateItem) != 6 {
+		return argon2idHash{}, config{}, &parseError{message: "Hash format is not valid"}
+	}
+
+	if separateItem[1] != "argon2id" {
+		return argon2idHash{}, config{}, &parseError{message: "Algorithm is not valid"}
+	}
+
+	separateParam := strings.Split(separateItem[3], ",")
+	if len(separateParam) != 3 {
+		return argon2idHash{}, config{}, &parseError{message: "Hash config is not valid"}
+	}
+
+	salt, err := base64.RawStdEncoding.Strict().DecodeString(separateItem[4])
+	if err != nil {
+		return argon2idHash{}, config{}, err
+	}
+
+	var hash []byte
+	hash, err = base64.RawStdEncoding.Strict().DecodeString(separateItem[5])
+	if err != nil {
+		return argon2idHash{}, config{}, err
+	}
+
+	saltLength := uint8(len(salt))
+	keyLength := uint32(len(hash))
+
+	var memory int
+	memory, err = strconv.Atoi(strings.Replace(separateParam[0], "m=", "", -1))
+	if err != nil {
+		return argon2idHash{}, config{}, err
+	}
+
+	var iterations int
+	iterations, err = strconv.Atoi(strings.Replace(separateParam[1], "t=", "", -1))
+	if err != nil {
+		return argon2idHash{}, config{}, err
+	}
+
+	var threads int
+	threads, err = strconv.Atoi(strings.Replace(separateParam[2], "p=", "", -1))
+	if err != nil {
+		return argon2idHash{}, config{}, err
+	}
+
+	return argon2idHash{salt: salt, hash: hash}, config{saltLength: saltLength, memory: uint32(memory), threads: uint8(threads), iterations: uint32(iterations), keyLength: keyLength}, nil
+}

internal/secret/error.go

@@ -0,0 +1,9 @@
+package secret
+
+type parseError struct {
+	message string
+}
+
+func (m *parseError) Error() string {
+	return "parseHash: " + m.message
+}

internal/utils/error.go

@@ -0,0 +1,17 @@
+package utils
+
+type parseIntBeforeSeparatorError struct {
+	message string
+}
+
+func (m *parseIntBeforeSeparatorError) Error() string {
+	return "parseIntBeforeSeparator: " + m.message
+}
+
+type ParseExpirationError struct {
+	message string
+}
+
+func (m *ParseExpirationError) Error() string {
+	return "parseIntBeforeSeparator: " + m.message
+}

internal/utils/utils.go

@@ -0,0 +1,99 @@
+package utils
+
+import (
+	"log"
+	mathrand "math/rand/v2"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// GenerateUrl generate random string for plak url
+func GenerateUrl(length uint8) string {
+	listChars := []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+	b := make([]rune, length)
+	for i := range b {
+		b[i] = listChars[mathrand.IntN(len(listChars))]
+	}
+
+	return string(b)
+}
+
+// CheckCharRedundant  verify is a character is redundant in a string
+func CheckCharRedundant(source string, char string) bool { // Verify if a char is redundant
+	return strings.Count(source, char) > 1
+}
+
+func parseIntBeforeSeparator(source *string, sep string) (int, error) { // return 0 & error if error, only accept positive number
+	if CheckCharRedundant(*source, sep) {
+		return 0, &parseIntBeforeSeparatorError{message: *source + ": cannot parse value as int"}
+	}
+	var value int
+	var err error
+	if strings.Contains(*source, sep) {
+		value, err = strconv.Atoi(strings.Split(*source, sep)[0])
+		if err != nil {
+			log.Println(err)
+			return 0, &parseIntBeforeSeparatorError{message: *source + ": cannot parse value as int"}
+		}
+		if value < 0 { // Only positive value is correct
+			return 0, &parseIntBeforeSeparatorError{message: *source + ": format only take positive value"}
+		}
+
+		if value > 99 {
+			return 0, &parseIntBeforeSeparatorError{message: *source + ": Format only take two number"}
+		}
+
+		*source = strings.Join(strings.Split(*source, sep)[1:], "")
+	}
+	return value, nil
+}
+
+// ParseExpiration Parse "1d1h1m1s" duration format. Return 0 & error if error
+func ParseExpiration(source string) (int, error) {
+	var expiration int
+	var tempOutput int
+	var err error
+	if source == "0" {
+		return 0, nil
+	}
+
+	source = strings.ToLower(source)
+
+	tempOutput, err = parseIntBeforeSeparator(&source, "d")
+	expiration = tempOutput * 86400
+	if err != nil {
+		log.Println(err)
+		return 0, &ParseExpirationError{message: "Invalid syntax"}
+	}
+	tempOutput, err = parseIntBeforeSeparator(&source, "h")
+	expiration += tempOutput * 3600
+	if err != nil {
+		log.Println(err)
+		return 0, &ParseExpirationError{message: "Invalid syntax"}
+	}
+	tempOutput, err = parseIntBeforeSeparator(&source, "m")
+	expiration += tempOutput * 60
+	if err != nil {
+		log.Println(err)
+		return 0, &ParseExpirationError{message: "Invalid syntax"}
+	}
+	tempOutput, err = parseIntBeforeSeparator(&source, "s")
+	expiration += tempOutput * 1
+	if err != nil {
+		log.Println(err)
+		return 0, &ParseExpirationError{message: "Invalid syntax"}
+	}
+
+	return expiration, nil
+}
+
+// ValidKey Verify if a key is valid (only letter, number, - and _)
+func ValidKey(key string) bool {
+	result, err := regexp.MatchString("^[a-zA-Z0-9_.-]*$", key)
+	if err != nil {
+		return false
+	}
+	log.Println(key, result)
+	return result
+}

internal/web/plak/error.go

@@ -0,0 +1,18 @@
+package plak
+
+type deletePlakError struct {
+	name string
+	err  error
+}
+
+func (m *deletePlakError) Error() string {
+	return "Cannot delete: " + m.name + " : " + m.err.Error()
+}
+
+type createError struct {
+	message string
+}
+
+func (m *createError) Error() string {
+	return "create: cannot create plak: " + m.message
+}

internal/web/plak/plak.go

@@ -0,0 +1,251 @@
+package plak
+
+import (
+	"context"
+	"embed"
+	"io"
+	"log"
+	"net/http"
+	"time"
+
+	"git.gnous.eu/gnouseu/plakken/internal/constant"
+	"git.gnous.eu/gnouseu/plakken/internal/database"
+	"git.gnous.eu/gnouseu/plakken/internal/secret"
+	"git.gnous.eu/gnouseu/plakken/internal/utils"
+	"github.com/redis/go-redis/v9"
+
+	"html/template"
+)
+
+var ctx = context.Background()
+
+type WebConfig struct {
+	DB        *redis.Client
+	UrlLength uint8
+	Templates embed.FS
+}
+
+// plak "Object" for plak
+type plak struct {
+	Key        string
+	Content    string
+	Expiration time.Duration
+	DB         *redis.Client
+}
+
+// create a plak
+func (plak plak) create() (string, error) {
+	dbConf := database.DBConfig{
+		DB: plak.DB,
+	}
+
+	token, err := secret.GenerateToken()
+	if err != nil {
+		return "", err
+	}
+
+	if dbConf.UrlExist(plak.Key) {
+		return "", &createError{message: "key already exist"}
+	}
+
+	var hashedSecret string
+	hashedSecret, err = secret.Password(token)
+	if err != nil {
+		return "", err
+	}
+
+	dbConf.InsertPaste(plak.Key, plak.Content, hashedSecret, plak.Expiration)
+
+	return token, nil
+}
+
+// PostCreate manage POST request for create plak
+func (config WebConfig) PostCreate(w http.ResponseWriter, r *http.Request) {
+	content := r.FormValue("content")
+	if content == "" {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	filename := r.FormValue("filename")
+	var key string
+	if len(filename) == 0 {
+		key = utils.GenerateUrl(config.UrlLength)
+	} else {
+		if !utils.ValidKey(filename) {
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		key = filename
+	}
+
+	plak := plak{
+		Key:     key,
+		Content: content,
+		DB:      config.DB,
+	}
+
+	rawExpiration := r.FormValue("exp")
+	expiration, err := utils.ParseExpiration(rawExpiration)
+	if err != nil {
+		log.Println(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	if expiration == 0 {
+		plak.Expiration = -1
+	} else {
+		plak.Expiration = time.Duration(expiration * int(time.Second))
+	}
+
+	_, err = plak.create()
+	if err != nil {
+		log.Println(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	http.Redirect(w, r, "/"+key, http.StatusSeeOther)
+}
+
+// CurlCreate PostCreate plak with minimum param, ideal for curl. Force 7 day expiration
+func (config WebConfig) CurlCreate(w http.ResponseWriter, r *http.Request) {
+	if r.ContentLength == 0 {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	content, _ := io.ReadAll(r.Body)
+	err := r.Body.Close()
+	if err != nil {
+		log.Println(err)
+	}
+
+	key := utils.GenerateUrl(config.UrlLength)
+
+	plak := plak{
+		Key:        key,
+		Content:    string(content),
+		Expiration: constant.ExpirationCurlCreate,
+		DB:         config.DB,
+	}
+
+	var token string
+	token, err = plak.create()
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	var baseURL string
+	if r.TLS == nil {
+		baseURL = "http://" + r.Host + "/" + key
+	} else {
+		baseURL = "https://" + r.Host + "/" + key
+	}
+
+	message := baseURL + "\n" + "Delete with : 'curl -X DELETE " + baseURL + "?secret\\=" + token + "'" + "\n"
+
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	_, err = io.WriteString(w, message)
+	if err != nil {
+		log.Println(err)
+	}
+}
+
+// View for plak
+func (config WebConfig) View(w http.ResponseWriter, r *http.Request) {
+	dbConf := database.DBConfig{
+		DB: config.DB,
+	}
+	var currentPlak plak
+	key := r.PathValue("key")
+
+	if dbConf.UrlExist(key) {
+		currentPlak = plak{
+			Key: key,
+			DB:  config.DB,
+		}
+		currentPlak = currentPlak.getContent()
+		if r.PathValue("settings") == "raw" {
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			_, err := io.WriteString(w, currentPlak.Content)
+			if err != nil {
+				log.Println(err)
+			}
+		} else {
+			t, err := template.ParseFS(config.Templates, "templates/paste.html")
+			if err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				log.Println(err)
+				return
+			}
+			err = t.Execute(w, currentPlak)
+			if err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				log.Println(err)
+				return
+			}
+		}
+	} else {
+		w.WriteHeader(http.StatusNotFound)
+	}
+}
+
+// DeleteRequest manage plak deletion endpoint
+func (config WebConfig) DeleteRequest(w http.ResponseWriter, r *http.Request) {
+	dbConf := database.DBConfig{
+		DB: config.DB,
+	}
+	key := r.PathValue("key")
+	var valid bool
+
+	if dbConf.UrlExist(key) {
+		var err error
+		token := r.URL.Query().Get("secret")
+
+		valid, err = dbConf.VerifySecret(key, token)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			log.Println(err)
+			return
+		}
+
+		if valid {
+			plak := plak{
+				Key: key,
+				DB:  config.DB,
+			}
+			err := plak.delete()
+			if err != nil {
+				log.Println(err)
+			}
+
+			w.WriteHeader(http.StatusNoContent)
+			return
+		} else {
+			w.WriteHeader(http.StatusForbidden)
+			return
+		}
+	}
+
+	w.WriteHeader(http.StatusNotFound)
+}
+
+// delete DeleteRequest plak from database
+func (plak plak) delete() error {
+	err := plak.DB.Del(ctx, plak.Key).Err()
+	if err != nil {
+		log.Println(err)
+		return &deletePlakError{name: plak.Key, err: err}
+	}
+
+	return nil
+}
+
+// getContent get plak content
+func (plak plak) getContent() plak {
+	plak.Content = plak.DB.HGet(ctx, plak.Key, "content").Val()
+	return plak
+}

main.go

@@ -1,102 +1,37 @@
 package main
 
 import (
-	"fmt"
+	"embed"
-	"github.com/redis/go-redis/v9"
-	"html/template"
-	"io"
 	"log"
-	"net/http"
+
-	"strings"
+	"git.gnous.eu/gnouseu/plakken/internal/config"
+	"git.gnous.eu/gnouseu/plakken/internal/database"
+	"git.gnous.eu/gnouseu/plakken/internal/httpServer"
 )
 
-var currentConfig Config
+var (
-var db *redis.Client
+	//go:embed templates
-
+	templates embed.FS
-type pasteView struct {
+	//go:embed static
-	Content string
+	static embed.FS
-	Key     string
+)
-}
-
-func handleRequest(w http.ResponseWriter, r *http.Request) {
-	path := r.URL.Path
-	clearPath := strings.ReplaceAll(r.URL.Path, "/raw", "")
-	staticResource := "/static/"
-	switch r.Method {
-	case "GET":
-		if path == "/" {
-			http.ServeFile(w, r, "./static/index.html")
-
-		} else if strings.HasPrefix(path, staticResource) {
-			fs := http.FileServer(http.Dir("./static"))
-			http.Handle(staticResource, http.StripPrefix(staticResource, fs))
-		} else {
-			if UrlExist(clearPath) {
-				if strings.HasSuffix(path, "/raw") {
-					pasteContent := getContent(clearPath)
-					w.Header().Set("Content-Type", "text/plain; charset=utf-8")
-					_, err := io.WriteString(w, pasteContent)
-					if err != nil {
-						log.Println(err)
-					}
-				} else {
-					pasteContent := getContent(path)
-					s := pasteView{Content: pasteContent, Key: strings.TrimPrefix(path, "/")}
-					t, err := template.ParseFiles("templates/paste.html")
-					if err != nil {
-						log.Println(err)
-					}
-					err = t.Execute(w, s)
-					if err != nil {
-						log.Println(err)
-					}
-				}
-			} else {
-				w.WriteHeader(http.StatusNotFound)
-			}
-		}
-	case "POST":
-		if path == "/" {
-			secret := GenerateSecret()
-			url := "/" + GenerateUrl()
-			content := r.FormValue("content")
-			insertPaste(url, content, secret, -1)
-			http.Redirect(w, r, url, http.StatusSeeOther)
-		} else {
-			w.WriteHeader(http.StatusMethodNotAllowed)
-		}
-	case "DELETE":
-		if UrlExist(path) {
-			secret := r.URL.Query().Get("secret")
-			if secret == db.HGet(ctx, path, "secret").Val() {
-				err := db.Del(ctx, path)
-				if err != nil {
-					log.Println(err)
-				}
-				w.WriteHeader(http.StatusNoContent)
-			} else {
-				w.WriteHeader(http.StatusForbidden)
-			}
-		} else {
-			w.WriteHeader(http.StatusNotFound)
-		}
-	}
-}
 
 func main() {
-	db = ConnectDB()
+	initConfig := config.GetConfig()
-	currentConfig = GetConfig()
+	dbConfig := database.InitDB(initConfig.RedisAddress, initConfig.RedisUser, initConfig.RedisPassword, initConfig.RedisDB)
-	listen := currentConfig.host + ":" + currentConfig.port
+	db := database.ConnectDB(dbConfig)
-	http.HandleFunc("/", handleRequest)
+	err := database.Ping(db)
-
-	if currentConfig.host == "" {
-		fmt.Println("Listening on port " + listen)
-	} else {
-		fmt.Println("Listening on " + listen)
-	}
-
-	err := http.ListenAndServe(listen, nil)
 	if err != nil {
 		log.Fatal(err)
 	}
+
+	serverConfig := httpServer.ServerConfig{
+		HTTPServer: httpServer.Config(initConfig.ListenAddress),
+		UrlLength:  initConfig.UrlLength,
+		DB:         db,
+		Static:     static,
+		Templates:  templates,
+	}
+
+	serverConfig.Server()
 }

static/index.html

@@ -7,55 +7,57 @@
           name="description">
     <meta content="Plakken" name="author">
     <meta content="width=device-width, initial-scale=1.0" name="viewport">
-    <title>New plak • Plakken</title>
+    <title>New plak • Plakken</title><script async src="/static/app.js"></script>
     <link href="/static/style.css" rel="stylesheet">
-    <script async src="/static/app.js"></script>
 </head>
 <body>
-<form method="post">
+<form action="/create/" method="post">
     <div>
         <label for="lines"></label>
         <textarea id="lines" readonly wrap="hard">1</textarea>
     </div>
     <div>
         <label for="content"></label>
-        <textarea autofocus id="content" name="content" placeholder="Your paste here"></textarea>
+        <textarea autofocus id="content" name="content" placeholder="Type your paste here"></textarea>
         <nav>
             <ul>
                 <li>
-                    <label for="password">Password?</label>
+                    <label for="password">
-                    <input id="password" type="text">
+                        <input id="password" placeholder="Password" type="text">
+                    </label>
                 </li>
-                <li><label for="exp">Expiration?</label>
-                    <input id="exp" type="date"></li>
                 <li>
-                    <label for="type">Type</label>
+                    <label for="exp">
-                    <select id="type" name="type">
+                        <input id="exp" name="exp" placeholder="Expiration (1d1h1m1s)" type="text">
-                        <option value="auto">Auto Detect</option>
+                    </label>
-                        <option value="c">C</option>
+                </li>
-                        <option value="cpp">C++</option>
+                <li>
-                        <option value="csharp">C#</option>
+                    <label for="type">
-                        <option value="css">CSS</option>
+                        <select id="type" name="type">
-                        <option value="go">Go</option>
+                            <option value="c">C</option>
-                        <option value="java">Java</option>
+                            <option value="cpp">C++</option>
-                        <option value="js">Javascript</option>
+                            <option value="csharp">C#</option>
-                        <option value="html">HTML</option>
+                            <option value="css">CSS</option>
-                        <option selected value="plain">Plaintext</option>
+                            <option value="go">Go</option>
-                        <option value="python">Python</option>
+                            <option value="java">Java</option>
-                        <option value="rb">Ruby</option>
+                            <option value="js">Javascript</option>
-                        <option value="rs">Rust</option>
+                            <option value="html">HTML</option>
-                        <option value="sh">Shell</option>
+                            <option selected value="plain">Plaintext</option>
-                        <option value="sql">SQL</option>
+                            <option value="python">Python</option>
-                        <option value="ts">Typescript</option>
+                            <option value="rb">Ruby</option>
-                        <option value="xml">XML</option>
+                            <option value="rs">Rust</option>
-                        <option value="yml">YAML</option>
+                            <option value="sh">Shell</option>
-                    </select>
+                            <option value="sql">SQL</option>
+                            <option value="ts">Typescript</option>
+                            <option value="xml">XML</option>
+                            <option value="yml">YAML</option>
+                        </select>
+                    </label>
                 </li>
             </ul>
             <button title="Save plak" type="submit">
-                <svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
+                <svg viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
-                    <polyline points="9 11 12 14 22 4"></polyline>
+                    <path d="M12.736 3.97a.733.733 0 0 1 1.047 0c.286.289.29.756.01 1.05L7.88 12.01a.733.733 0 0 1-1.065.02L3.217 8.384a.757.757 0 0 1 0-1.06.733.733 0 0 1 1.047 0l3.052 3.093 5.4-6.425z"></path>
-                    <path d="M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11"></path>
                 </svg>
             </button>
         </nav>

static/style.css

@@ -1,8 +1,9 @@
 :root {
     --accent: #be0560;
-    --background: #141414;
+    --background: #121212;
     --border: #333;
-    --text: #e9e9e9;
+    --text: #e6e6e6;
+    --placeholder: #666;
 }
 
 body {
@@ -17,6 +18,32 @@ form {
     flex-flow: row wrap;
 }
 
+#lines {
+    color: var(--placeholder);
+    font: 400 14px/1.6 "JetBrains Mono", monospace;
+    height: calc(100vh - 29px);
+    overflow-y: hidden;
+    padding: 8px 0;
+    text-align: center;
+    user-select: none;
+    width: 26px;
+}
+
+input, select {
+    background-color: var(--background);
+    border: 2px solid var(--border);
+    border-radius: 2px;
+    color: var(--text);
+    font-size: 13px;
+    outline: none;
+    padding: 6px 8px;
+    transition: border .15s ease;
+}
+
+input:hover, select:hover {
+    border-color: var(--text);
+}
+
 button, textarea {
     background-color: inherit;
     border: none;
@@ -24,36 +51,20 @@ button, textarea {
     resize: none;
 }
 
-#lines {
-    color: #999;
-    font: 400 14px/1.6 "JetBrains Mono", monospace;
-    height: calc(100vh - 3rem);
-    overflow-y: hidden;
-    padding: 10px 0;
-    text-align: center;
-    user-select: none;
-    width: 26px;
-}
-
 #content {
     color: var(--text);
     font: 400 14px/1.6 "JetBrains Mono", monospace;
-    height: calc(100vh - 3rem);
+    height: calc(100vh - 29px);
-    padding: 10px 10px 10px 6px;
+    padding: 8px;
-    width: calc(100vw - 42px);
+    width: calc(100vw - 45px);
-}
-
-pre {
-    margin: 15px;
 }
 
 nav {
-    align-items: end;
+    top: 1rem;
-    bottom: 1rem;
     display: flex;
     flex-flow: row wrap;
     position: absolute;
-    right: 1rem;
+    right: 12px;
 }
 
 ul {
@@ -65,33 +76,12 @@ ul {
     padding: 0 1.9rem;
 }
 
-label {
-    display: block;
-}
-
-input, select {
-    background-color: var(--background);
-    border: 2px solid var(--border);
-    border-radius: 2px;
-    color: var(--text);
-    font-size: 15px;
-    outline: none;
-    padding: 6px 8px;
-    transition: border .15s ease;
-}
-
-input:hover, select:hover {
-    border-color: var(--text);
-}
-
 svg {
-    fill: none;
+    cursor: pointer;
-    height: 26px;
+    height: 24px;
-    stroke: var(--text);
+    fill: var(--text);
-    stroke-width: 2;
-    stroke-linecap: round;
     transition: .15s ease;
-    width: 26px;
+    width: 24px;
 }
 
 svg:hover {
@@ -102,10 +92,6 @@ input:focus-visible, select:focus-visible {
     border: 2px solid var(--text);
 }
 
-button:focus-visible {
-    outline: none;
-}
-
 ::selection {
     background-color: var(--accent);
     color: #fff;

test/secret/secret_test.go

@@ -0,0 +1,47 @@
+package secret_test
+
+import (
+	"fmt"
+	"regexp"
+	"testing"
+
+	"git.gnous.eu/gnouseu/plakken/internal/constant"
+	"git.gnous.eu/gnouseu/plakken/internal/secret"
+	"golang.org/x/crypto/argon2"
+)
+
+func TestPasswordFormat(t *testing.T) {
+	regex := fmt.Sprintf("\\$argon2id\\$v=%d\\$m=%d,t=%d,p=%d\\$[A-Za-z0-9+/]*\\$[A-Za-z0-9+/]*$", argon2.Version, constant.ArgonMemory, constant.ArgonIterations, constant.ArgonThreads)
+
+	got, err := secret.Password("Password!")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	result, _ := regexp.MatchString(regex, got)
+	if !result {
+		t.Fatal("Error in Password, format is not valid "+": ", got)
+	}
+}
+
+func TestVerifyPassword(t *testing.T) {
+	result, err := secret.VerifyPassword("Password!", "$argon2id$v=19$m=65536,t=2,p=4$A+t5YGpyy1BHCbvk/LP1xQ$eNuUj6B2ZqXlGi6KEqep39a7N4nysUIojuPXye+Ypp0")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !result {
+		t.Fatal("Error in VerifyPassword, got:", result, "want: ", true)
+	}
+}
+
+func TestVerifyPasswordInvalid(t *testing.T) {
+	result, err := secret.VerifyPassword("notsamepassword", "$argon2id$v=19$m=65536,t=2,p=4$A+t5YGpyy1BHCbvk/LP1xQ$eNuUj6B2ZqXlGi6KEqep39a7N4nysUIojuPXye+Ypp0")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if result {
+		t.Fatal("Error in VerifyPassword, got:", result, "want: ", false)
+	}
+}

test/utils/utils_test.go

@@ -0,0 +1,107 @@
+package utils_test
+
+import (
+	"errors"
+	"testing"
+
+	"git.gnous.eu/gnouseu/plakken/internal/utils"
+)
+
+func TestCheckCharNotRedundantTrue(t *testing.T) { // Test CheckCharRedundant with redundant char
+	want := true
+	got := utils.CheckCharRedundant("2d1h3md4h7s", "h")
+	if got != want {
+		t.Fatal("Error in parseExpirationFull, want : ", want, "got : ", got)
+	}
+}
+
+func TestCheckCharNotRedundantFalse(t *testing.T) { // Test CheckCharRedundant with not redundant char
+	want := false
+	got := utils.CheckCharRedundant("2d1h3m47s", "h")
+	if got != want {
+		t.Fatal("Error in parseExpirationFull, want : ", want, "got : ", got)
+	}
+}
+
+func TestParseExpirationFull(t *testing.T) { // test parseExpirationFull with all valid separator
+	result, _ := utils.ParseExpiration("2d1h3m47s")
+	correctValue := 176627
+	if result != correctValue {
+		t.Fatal("Error in parseExpirationFull, want : ", correctValue, "got : ", result)
+	}
+}
+
+func TestParseExpirationMissing(t *testing.T) { // test parseExpirationFull with all valid separator
+	result, _ := utils.ParseExpiration("1h47s")
+	correctValue := 3647
+	if result != correctValue {
+		t.Fatal("Error in ParseExpirationFull, want : ", correctValue, "got : ", result)
+	}
+}
+
+func TestParseExpirationWithCaps(t *testing.T) { // test parseExpirationFull with all valid separator
+	result, _ := utils.ParseExpiration("2D1h3M47s")
+	correctValue := 176627
+	if result != correctValue {
+		t.Fatal("Error in parseExpirationFull, want : ", correctValue, "got : ", result)
+	}
+}
+
+func TestParseExpirationNull(t *testing.T) { // test ParseExpirationFull with all valid separator
+	result, _ := utils.ParseExpiration("0")
+	correctValue := 0
+	if result != correctValue {
+		t.Fatal("Error in ParseExpirationFull, want: ", correctValue, "got: ", result)
+	}
+}
+
+func TestParseExpirationNegative(t *testing.T) { // test ParseExpirationFull with all valid separator
+	_, got := utils.ParseExpiration("-42h1m4s")
+	want := &utils.ParseExpirationError{}
+	if !errors.As(got, &want) {
+		t.Fatal("Error in ParseExpirationFull, want : ", want, "got : ", got)
+	}
+}
+
+func TestParseExpirationInvalid(t *testing.T) { // test ParseExpirationFull with all valid separator
+	_, got := utils.ParseExpiration("8h42h1m1d4s")
+	want := &utils.ParseExpirationError{}
+	if !errors.As(got, &want) {
+		t.Fatal("Error in ParseExpirationFull, want : ", want, "got : ", got)
+	}
+
+}
+
+func TestParseExpirationInvalidRedundant(t *testing.T) { // test ParseExpirationFull with all valid separator
+	_, got := utils.ParseExpiration("8h42h1m1h4s")
+	want := &utils.ParseExpirationError{}
+	if !errors.As(got, &want) {
+		t.Fatal("Error in ParseExpirationFull, want : ", want, "got : ", got)
+	}
+}
+
+func TestParseExpirationInvalidTooHigh(t *testing.T) { // test ParseExpirationFull with all valid separator
+	_, got := utils.ParseExpiration("2d1h3m130s")
+	want := &utils.ParseExpirationError{}
+	if !errors.As(got, &want) {
+		t.Fatal("Error in ParseExpirationFull, want : ", want, "got : ", got)
+	}
+}
+
+func TestValidKey(t *testing.T) { // test ValidKey with a valid key
+	got := utils.ValidKey("ab_a-C42")
+	want := true
+
+	if got != want {
+		t.Fatal("Error in ValidKey, want : ", want, "got : ", got)
+	}
+}
+
+func TestInValidKey(t *testing.T) { // test ValidKey with invalid key
+	got := utils.ValidKey("ab_?a-C42")
+	want := false
+
+	if got != want {
+		t.Fatal("Error in ValidKey, want : ", want, "got : ", got)
+	}
+}

utils.go

@@ -1,36 +0,0 @@
-package main
-
-import (
-	"crypto/rand"
-	"encoding/hex"
-	"log"
-	mathrand "math/rand"
-)
-
-func GenerateUrl() string {
-	listChars := []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
-	b := make([]rune, currentConfig.urlLength)
-	for i := range b {
-		b[i] = listChars[mathrand.Intn(len(listChars))]
-	}
-
-	return string(b)
-}
-
-func GenerateSecret() string {
-	key := make([]byte, 32)
-	_, err := rand.Read(key)
-	if err != nil {
-		log.Printf("Failed to generate secret")
-	}
-
-	return hex.EncodeToString(key)
-}
-
-func UrlExist(url string) bool {
-	return db.Exists(ctx, url).Val() == 1
-}
-
-func VerifySecret(url string, secret string) bool {
-	return secret == db.HGet(ctx, url, "secret").Val()
-}