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transport.go
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transport.go
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package fork
import (
"bytes"
"io/ioutil"
"net/http"
)
type ServerTransport interface {
Register(fun string, handler func(in []byte) ([]byte, error))
}
type ClientTransport interface {
Call(fun string, data []byte) ([]byte, error)
}
type HttpServerTransport struct {
sv *http.ServeMux
callUrl string
}
func NewHttpServerTransport(sv *http.ServeMux) ServerTransport {
return &HttpServerTransport{
sv: sv,
}
}
func (h *HttpServerTransport) Register(fun string, handler func(in []byte) ([]byte, error)) {
h.sv.HandleFunc(fun, func(writer http.ResponseWriter, request *http.Request) {
f := func() error {
input, err := ioutil.ReadAll(request.Body)
if err != nil {
return err
}
request.Body.Close()
output, err := handler(input)
if err != nil {
return err
}
writer.Write(output)
return nil
}
err := f()
if err != nil {
writer.WriteHeader(500)
writer.Write([]byte(err.Error()))
}
})
}
type HttpClientTransport struct {
callUrl string
}
func NewHttpClientTransport(callUrl string) ClientTransport {
return &HttpClientTransport{
callUrl: callUrl,
}
}
func (h *HttpClientTransport) Call(fun string, data []byte) ([]byte, error) {
req, err := http.NewRequest("POST", h.callUrl+fun, bytes.NewReader(data))
if err != nil {
return nil, err
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
return ioutil.ReadAll(resp.Body)
}