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convert.go
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convert.go
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package goa
import (
"log"
"reflect"
"github.com/lovego/errs"
)
func convertHandler(h interface{}, path string) func(*Context) {
if handler, ok := h.(func(*Context)); ok {
return handler
}
val := reflect.ValueOf(h)
typ := val.Type()
if typ.Kind() != reflect.Func {
log.Panic("handler must be a func.")
}
if typ.NumIn() != 2 {
log.Panic("handler func must have exactly two parameters.")
}
if typ.NumOut() != 0 {
log.Panic("handler func must have no return values.")
}
reqConvertFunc, hasCtx := newReqConvertFunc(typ.In(0), path)
respTyp, respWriteFunc := newRespWriteFunc(typ.In(1), hasCtx)
return func(ctx *Context) {
req, err := reqConvertFunc(ctx)
if err != nil {
ctx.Data(nil, errs.New("args-err", err.Error()))
return
}
resp := reflect.New(respTyp)
val.Call([]reflect.Value{req, resp})
if respWriteFunc != nil {
respWriteFunc(ctx, resp.Elem())
}
}
}
// handler example
func handlerExample(req *struct {
Title string
Desc string
Param struct {
Id int64
}
Query struct {
Id int64
Page int64
}
Header struct {
Cookie string
}
Body struct {
Id int64
Name string
}
Session struct {
UserId int64
}
Ctx *Context
}, resp *struct {
Error error
Data struct {
Id int64
Name string
}
Header struct {
SetCookie string
}
}) {
// resp.Body, resp.Error = users.Get(req.Params.Id)
}