英文:
Converting URL Params to JSON in Go with http.Request
问题
我正在验证由请求生成的参数，但与使用 JSON 进行请求时不同，我无法轻松地将查询参数转换为其结构体对应项。使用以下代码：
type ItemsRequest struct {
Item string `json:"item"`
}
func ValidateItemRequest(r *http.Request, w http.ResponseWriter) map[string]interface{} {
var itemRequest ItemsRequest
rules := govalidator.MapData{
"item": []string{"numeric"},
}
opts := govalidator.Options{
Request: r,
Rules: rules,
Data: &itemRequest,
RequiredDefault: true,
}
v := govalidator.New(opts)
e := v.Validate()
// 访问 itemsRequest.item
}
如果我使用 e.ValidateJSON() 并通过请求体传递数据，这样可以工作。
如果我使用 e.Validate() 并通过 URL 参数传递数据，这样就不起作用。
我以为结构体中的 json 标签是问题所在，但是删除它后结果相同。我不认为 Validate() 应该填充结构体，那么我应该如何传递 URL 的值？
我知道我可以使用 r.URL.Query().Get() 手动获取每个值，但在验证了我想要的一切之后，这似乎非常冗余。
英文:
I'm validating parameters made from a request, but unlike when the request is made in JSON, I'm not able to easily convert query params into it's struct counterpart. Using the following:
https://thedevsaddam.medium.com/an-easy-way-to-validate-go-request-c15182fd11b1
type ItemsRequest struct {
Item string `json:"item"`
}
func ValidateItemRequest(r *http.Request, w http.ResponseWriter) map[string]interface{} {
var itemRequest ItemsRequest
rules := govalidator.MapData{
"item": []string{"numeric"},
}
opts := govalidator.Options{
Request: r,
Rules: rules,
Data: &itemRequest ,
RequiredDefault: true,
}
v := govalidator.New(opts)
e := v.Validate()
// access itemsRequest.item
}
If I use e.ValidateJSON() and pass the data in via the body, this works
If I use e.Validate() and pass the data in via url params, this doesn't work.
I assumed the json tag in the struct was the issue, but removing that yields the same result. I don't think Validate() is supposed to populate the struct, but then how am I supposed to pass in the values of the URL?
I know I can use r.URL.Query().Get() to manually pull in each value, but that seems super redundant after I just validated everything I want.
答案1
得分: 1
https://pkg.go.dev/github.com/gorilla/schema 可以为您完成繁重的工作，将 url.Values 转换为 struct，并进行一些模式验证。
它支持类似于 json 的结构字段标签，并且还可以与表单数据或多部分表单数据一起使用。
package main
import (
"github.com/gorilla/schema"
"net/url"
"fmt"
)
type Person struct {
Name string
Phone string
}
func main() {
var decoder = schema.NewDecoder()
u, err := url.Parse("http://localhost/?name=daniel&phone=612-555-4321")
if err != nil { panic(err) }
var person Person
err = decoder.Decode(&person, u.Query())
if err != nil {
// 处理错误
}
fmt.Printf("%+v\n", person)
}
英文:
https://pkg.go.dev/github.com/gorilla/schema can do the heavy lifting for you, converting url.Values into a struct and doing some schema validation as well.
It supports struct field tags much like - and compatible with - json, and can also be used with eg form data or multi-part form data.
package main
import(
"github.com/gorilla/schema"
"net/url"
"fmt"
)
type Person struct {
Name string
Phone string
}
func main() {
var decoder = schema.NewDecoder()
u, err := url.Parse("http://localhost/?name=daniel&phone=612-555-4321")
if err != nil { panic(err) }
var person Person
err = decoder.Decode(&person, u.Query())
if err != nil {
// Handle error
}
fmt.Printf("%+v\n", person)
}
答案2
得分: 0
首先，使用查询结果填充结构体，然后进行验证：
q := request.URL.Query()
myStruct := {
Field1: q.Get("field1"),
Field2: q.Get("field2"),
...
}
// 处理非字符串字段
// 验证结构体
英文:
First populate the struct with the values from the query, then validate it:
q:=request.URL.Query()
myStruct:= {
Field1: q.Get("field1"),
Field2: q.Get("field2"),
...
}
// Deal with non-string fields
// Validate the struct
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