add validation example

httpserver/xsrf/main.go

@@ -15,9 +15,8 @@
 package main
 
 import (
-	"html/template"
-
 	"github.com/beego/beego/v2/server/web"
+	"html/template"
 )
 
 func main() {
@@ -28,6 +27,7 @@ func main() {
 	mc := &MainController{}
 
 	web.Router("/xsrfpage", mc, "get:XsrfPage")
+	web.Router("/xsrfjson", mc, "get:XsrfJSON")
 	web.Router("/new_message", mc, "post:NewMessage")
 
 	web.Run(":8080")
@@ -43,7 +43,18 @@ func (mc *MainController) XsrfPage() {
 	mc.TplName = "xsrf.html"
 }
 
+func (mc *MainController) XsrfJSON() {
+	mc.XSRFExpire = 7200
+	type data struct {
+		XsrfToken string `json:"xsrfToken"`
+	}
+	token := mc.XSRFToken()
+	mc.Ctx.Output.Header("xsrf", token)
+	_ = mc.JSONResp(&data{XsrfToken: token})
+}
+
 func (mc *MainController) NewMessage() {
+	mc.CheckXSRFCookie()
 	v, _ := mc.Input()
 	mc.Ctx.WriteString("hello" + v.Get("message"))
 }

validation/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"log"
+	"strings"
+
+	"github.com/beego/beego/v2/core/validation"
+)
+
+// Set validation function in "valid" tag
+// Use ";" as the separator of multiple functions. Spaces accept after ";"
+// Wrap parameters with "()" and separate parameter with ",". Spaces accept after ","
+// Wrap regex match with "//"
+type user struct {
+	Id      int
+	Name    string `valid:"Required;Match(/^Bee.*/)"` // Name cannot be empty and must have prefix Bee
+	Age     int    `valid:"Range(1, 140)"`            // 1 <= Age <= 140
+	Email   string `valid:"Email; MaxSize(100)"`      // Email must be valid email address and the length must be <= 100
+	Mobile  string `valid:"Mobile"`                   // Mobile must be valid mobile
+	IP      string `valid:"IP"`                       // IP must be a valid IPV4 address
+	Address string `valid:"ChinaAddress"`
+}
+
+func (u *user) Valid(v *validation.Validation) {
+	if strings.Index(u.Name, "admin") != -1 {
+		// 通过 SetError 设置 Name 的错误信息，HasErrors 将会返回 true
+		v.SetError("Name", "name should contain word admin")
+	}
+}
+
+func main() {
+	_ = validation.AddCustomFunc("ChinaAddress", func(v *validation.Validation, obj interface{}, key string) {
+		addr, ok := obj.(string)
+		if !ok {
+			return
+		}
+		if !strings.HasPrefix(addr, "China") {
+			v.AddError(key, "China address only")
+		}
+	})
+	valid := validation.Validation{}
+	u := user{Name: "Beego", Age: 2, Email: "[email protected]"}
+	b, err := valid.Valid(&u)
+	if err != nil {
+		// handle error
+	}
+	if !b {
+		// validation does not pass
+		// blabla...
+		for _, err := range valid.Errors {
+			log.Println(err.Key, err.Message)
+		}
+	}
+}