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66 lines
1.3 KiB
66 lines
1.3 KiB
4 years ago
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package main
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import (
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"errors"
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"fmt"
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"log"
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stdhttp "net/http"
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"github.com/go-kratos/kratos/v2"
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"github.com/go-kratos/kratos/v2/transport/http"
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)
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// HTTPError is an HTTP error.
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type HTTPError struct {
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Code int `json:"code"`
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Message string `json:"message"`
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}
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func (e *HTTPError) Error() string {
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return fmt.Sprintf("HTTPError code: %d message: %s", e.Code, e.Message)
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}
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// FromError try to convert an error to *HTTPError.
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func FromError(err error) *HTTPError {
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if err == nil {
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return nil
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}
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if se := new(HTTPError); errors.As(err, &se) {
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return se
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}
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return &HTTPError{Code: 500}
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}
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func errorEncoder(w stdhttp.ResponseWriter, r *stdhttp.Request, err error) {
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se := FromError(err)
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codec, _ := http.CodecForRequest(r, "Accept")
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body, err := codec.Marshal(se)
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if err != nil {
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w.WriteHeader(500)
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return
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}
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w.Header().Set("Content-Type", "application/"+codec.Name())
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w.WriteHeader(se.Code)
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w.Write(body)
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}
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func main() {
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httpSrv := http.NewServer(
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http.Address(":8000"),
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http.ErrorEncoder(errorEncoder),
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)
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router := httpSrv.Route("/")
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router.GET("home", func(ctx http.Context) error {
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return &HTTPError{Code: 400, Message: "request error"}
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})
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app := kratos.New(
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kratos.Name("mux"),
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kratos.Server(
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httpSrv,
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),
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)
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if err := app.Run(); err != nil {
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log.Fatal(err)
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}
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}
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