You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.0 KiB
93 lines
2.0 KiB
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"html/template"
|
|
"strings"
|
|
)
|
|
|
|
var httpTemplate = `
|
|
type {{.ServiceType}}Handler interface {
|
|
{{range .MethodSets}}
|
|
{{.Name}}(context.Context, *{{.Request}}) (*{{.Reply}}, error)
|
|
{{end}}
|
|
}
|
|
|
|
func New{{.ServiceType}}Handler(srv {{.ServiceType}}Handler, opts ...http1.HandleOption) http.Handler {
|
|
h := http1.DefaultHandleOptions()
|
|
for _, o := range opts {
|
|
o(&h)
|
|
}
|
|
r := mux.NewRouter()
|
|
{{range .Methods}}
|
|
r.HandleFunc("{{.Path}}", func(w http.ResponseWriter, r *http.Request) {
|
|
var in {{.Request}}
|
|
if err := h.Decode(r, &in{{.Body}}); err != nil {
|
|
h.Error(w, r, err)
|
|
return
|
|
}
|
|
{{if ne (len .Vars) 0}}
|
|
if err := binding.MapProto(&in, mux.Vars(r)); err != nil {
|
|
h.Error(w, r, err)
|
|
return
|
|
}
|
|
{{end}}
|
|
next := func(ctx context.Context, req interface{}) (interface{}, error) {
|
|
return srv.{{.Name}}(ctx, req.(*{{.Request}}))
|
|
}
|
|
if h.Middleware != nil {
|
|
next = h.Middleware(next)
|
|
}
|
|
out, err := next(r.Context(), &in)
|
|
if err != nil {
|
|
h.Error(w, r, err)
|
|
return
|
|
}
|
|
reply := out.(*{{.Reply}})
|
|
if err := h.Encode(w, r, reply{{.ResponseBody}}); err != nil {
|
|
h.Error(w, r, err)
|
|
}
|
|
}).Methods("{{.Method}}")
|
|
{{end}}
|
|
return r
|
|
}
|
|
`
|
|
|
|
type serviceDesc struct {
|
|
ServiceType string // Greeter
|
|
ServiceName string // helloworld.Greeter
|
|
Metadata string // api/helloworld/helloworld.proto
|
|
Methods []*methodDesc
|
|
MethodSets map[string]*methodDesc
|
|
}
|
|
|
|
type methodDesc struct {
|
|
// method
|
|
Name string
|
|
Num int
|
|
Vars []string
|
|
Forms []string
|
|
Request string
|
|
Reply string
|
|
// http_rule
|
|
Path string
|
|
Method string
|
|
Body string
|
|
ResponseBody string
|
|
}
|
|
|
|
func (s *serviceDesc) execute() string {
|
|
s.MethodSets = make(map[string]*methodDesc)
|
|
for _, m := range s.Methods {
|
|
s.MethodSets[m.Name] = m
|
|
}
|
|
buf := new(bytes.Buffer)
|
|
tmpl, err := template.New("http").Parse(strings.TrimSpace(httpTemplate))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
if err := tmpl.Execute(buf, s); err != nil {
|
|
panic(err)
|
|
}
|
|
return string(buf.Bytes())
|
|
}
|
|
|