expiry time functionality & request validation

main.go

@@ -9,61 +9,54 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"net/http"
 	"os"
 	"strings"
 	"time"
 
 	"gopkg.in/gin-gonic/gin.v1"
+	"gopkg.in/gin-gonic/gin.v1/binding"
 )
 
 // Item holds the data.
 type Item struct {
 	Data   string    `json:"data"`
-	Expiry time.Time `json:"expiryData"`
-	TTL    int32     `json:"ttl"`
+	Expiry time.Time `json:"expiryDate"`
+	TTL    int       `json:"ttl"`
 }
 
 // Vault holds the vault data and key.
 type Vault struct {
-	Vault string `json:"vault"`
-	Key   string `json:"key"`
+	Vault string `json:"vault" binding:"required"`
+	Key   string `json:"key" binding:"required"`
 }
 
 func main() {
+	binding.Validator = new(DefaultValidator)
 	router := gin.Default()
-	router.Use(CORS(os.Getenv("VAULT_APP_URL")))
+
+	appURL := os.Getenv("VAULT_APP_URL")
+	if appURL == "" {
+		appURL = "*"
+	}
+
+	router.Use(CORS(appURL))
+	router.Use(Logger())
+
 	router.POST("/", createAction)
 	router.POST("/decrypt", decryptAction)
 	router.Run(":7014")
 }
 
-// CORS handles setting up the CORS security headers.
-func CORS(allowOrigin string) gin.HandlerFunc {
-	return func(c *gin.Context) {
-		c.Writer.Header().Set("Access-Control-Allow-Origin", allowOrigin)
-		c.Writer.Header().Set("Access-Control-Max-Age", "86400")
-		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PATCH, DELETE, UPDATE")
-		c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
-		c.Writer.Header().Set("Access-Control-Expose-Headers", "Content-Length")
-		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
-
-		if c.Request.Method == "OPTIONS" {
-			fmt.Println("OPTIONS")
-			c.AbortWithStatus(200)
-		} else {
-			c.Next()
-		}
-	}
-}
-
-func show(c *gin.Context) {
-	log.Println("asdasdsa")
-}
-
 func createAction(c *gin.Context) {
 	var item Item
 	c.BindJSON(&item)
 
+	if item.TTL > 0 {
+		currentTime := time.Now()
+		item.Expiry = currentTime.Add(-time.Duration(item.TTL) * time.Second)
+	}
+
 	key := generateUniqueID(16)
 	json, _ := json.Marshal(&item)
 	data := encrypt([]byte(key), string(json))
@@ -79,7 +72,8 @@ func decryptAction(c *gin.Context) {
 	var vault Vault
 	err := c.BindJSON(&vault)
 	if err != nil {
-		panic(err)
+		c.AbortWithStatus(http.StatusBadRequest)
+		return
 	}
 
 	data := decrypt([]byte(vault.Key), vault.Vault)
@@ -87,7 +81,16 @@ func decryptAction(c *gin.Context) {
 	var item Item
 	err = json.Unmarshal([]byte(data), &item)
 	if err != nil {
-		panic(err)
+		log.Println("tete")
+		log.Fatal(err)
+		c.AbortWithStatus(http.StatusBadRequest)
+		return
+	}
+
+	currentTime := time.Now()
+	if currentTime.Unix() > item.Expiry.Unix() {
+		c.AbortWithStatus(404)
+		return
 	}
 
 	c.JSON(200, item)

middleware.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+
+	"gopkg.in/gin-gonic/gin.v1"
+)
+
+// CORS handles setting up the CORS security headers.
+func CORS(allowOrigin string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", allowOrigin)
+		c.Writer.Header().Set("Access-Control-Max-Age", "86400")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PATCH, DELETE, UPDATE")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
+		c.Writer.Header().Set("Access-Control-Expose-Headers", "Content-Length")
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+
+		if c.Request.Method == "OPTIONS" {
+			fmt.Println("OPTIONS")
+			c.AbortWithStatus(200)
+		} else {
+			c.Next()
+		}
+	}
+}
+
+// Logger handles some logging.
+func Logger() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Header("Content-Type", "application/json")
+		c.Next()
+
+		errors := c.Errors.ByType(gin.ErrorTypeAny)
+		if len(errors) > 0 {
+			c.JSON(-1, errors.JSON())
+			return
+		}
+	}
+}

vaildator.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"reflect"
+	"sync"
+
+	"gopkg.in/gin-gonic/gin.v1/binding"
+	"gopkg.in/go-playground/validator.v9"
+)
+
+// DefaultValidator override.
+type DefaultValidator struct {
+	once     sync.Once
+	validate *validator.Validate
+}
+
+var _ binding.StructValidator = &DefaultValidator{}
+
+// ValidateStruct override.
+func (v *DefaultValidator) ValidateStruct(obj interface{}) error {
+	if kindOfData(obj) == reflect.Struct {
+		v.lazyinit()
+
+		if err := v.validate.Struct(obj); err != nil {
+			return error(err)
+		}
+	}
+
+	return nil
+}
+
+func (v *DefaultValidator) lazyinit() {
+	v.once.Do(func() {
+		v.validate = validator.New()
+		v.validate.SetTagName("binding")
+	})
+}
+
+func kindOfData(data interface{}) reflect.Kind {
+
+	value := reflect.ValueOf(data)
+	valueType := value.Kind()
+
+	if valueType == reflect.Ptr {
+		valueType = value.Elem().Kind()
+	}
+	return valueType
+}