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json_params_check.go
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json_params_check.go
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package main
import (
"github.com/anonymous5l/console"
// "github.com/valyala/fasthttp"
"github.com/anonymous5l/goflow/general"
"github.com/anonymous5l/goflow/interfaces"
"github.com/mitchellh/mapstructure"
"reflect"
"strings"
)
type Rule struct {
Passing bool
PType string `mapstructure:"type"`
PDefault interface{} `mapstructure:"default"`
Params map[string]*Rule
}
type Rules struct {
Path string
Params map[string]*Rule
}
var arules []*Rules
func setResponseCode(req interfaces.Request, code int) error {
ctx := req.GetContext()
ctx.SetStatusCode(code)
return general.Abort
}
func checkPType(t string, k reflect.Kind) bool {
switch t {
case "str":
if k == reflect.String {
return true
}
case "map":
if k == reflect.Map {
return true
}
case "num":
if k == reflect.Float64 {
return true
}
case "bool":
if k == reflect.Bool {
return true
}
}
return false
}
func checkParamsObject(params map[string]*Rule, m map[string]interface{}) bool {
if params != nil {
for k, v := range params {
if cv, ok := m[k]; ok {
kind := reflect.TypeOf(cv).Kind()
if !checkPType(v.PType, kind) {
console.Warn("jpc: param type wrong %s", k)
return false
}
if kind == reflect.Map {
if !checkParamsObject(v.Params, cv.(map[string]interface{})) {
return false
}
}
} else {
if !v.Passing && v.PDefault == nil {
console.Warn("jpc: missing param %s", k)
return false
} else {
m[k] = v.PDefault
}
}
}
}
return true
}
func before_params_check(req interfaces.Request) error {
uri := req.URI()
path := string(uri.Path())
for _, rule := range arules {
if strings.Compare("POST", req.Method()) == 0 {
if strings.Compare(path, rule.Path) == 0 {
// found it
if m, err := req.JsonMapBody(); err != nil {
console.Warn("jpc: check %s unmarshal json failed!", path)
return setResponseCode(req, 400)
} else {
if !checkParamsObject(rule.Params, m) {
console.Warn("jpc: check %s params failed!", path)
return setResponseCode(req, 400)
}
req.SetValue("JsonBody", m)
}
}
}
}
return nil
}
func Init(ctx interfaces.Context, scope interfaces.Scope, params interface{}) error {
console.Ok("mount json params check plugin")
if p, ok := params.(map[string]interface{}); ok {
if nodes, ok := p["nodes"].([]map[string]interface{}); ok {
if err := mapstructure.Decode(nodes, &arules); err != nil {
console.Err("jpc: can't convert to struct %s", err)
}
}
}
scope.Before(before_params_check)
return nil
}