api之http handler层
总览:
api
│ handlers.go
│ main.go
│ response.go
│
├─dbops
│ api.go
│
└─defs
apidef.go
errs.go
流程:
handler->validation{1.request, 2.user}->business logic->response
- data model.
- error handing.
handler.go会调用dbops, 拿到它想要的东西, 然后做进一步处理, 处理包括消息/信息的定义, 然后将它们一起组装成response, 最后调取response.go, response返回结果到handler.go, 最后输出.
handlers.go
package main
import (
"github.com/julienschmidt/httprouter"
"io"
"net/http"
)
func CreateUser(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
io.WriteString(w, "Create User Handler")
}
func Login(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
uname := p.ByName("username")
io.WriteString(w, uname)
}
apidef.go 接受用户名和密码
package defs
type UserCredential struct {
Username string `json:"username"`
Pwd string `json:"pwd"`
}
--------------------------------------------
`json`是go里打tag的一种方式,会产生下面的结构
{
Username:xxx
Pwd:xxx
}
errs.go 错误返回
package defs
type Err struct {
Error string `json:"error"`
ErrorCode string `json:"error_code"`
}
type ErrResponse struct {
HttpSC int
Erros Err
}
var (
ErrorRequestBodyParseFailed = ErrResponse{HttpSC: 400, Error:Err{Error:"Request body is not correct", ErrorCode:"001"}}
ErrorNotAuthUser = ErrResponse{HttpSC: 401, Error:Err{Error:"User authentical faild", ErrorCode:"002"}}
)
dpops/api.go 连接数据库并操作
package dbops
import (
"database/sql"
)
func openConn() *sql.DB {
}
func AddUserCredential(loginName string, pwd string) error {
}
func GetUserCredential(loginName string ) (string, error) {
}
response.go 根据处理结果返回相应的response
package main
import (
//"io"
"net/http"
)
func sendErrorResponse(w http.ResponseWriter){
}
func sendNormalResponse(w http.ResponseWriter) {
}
