micro/util/http/http.go
2020-03-20 15:23:12 +00:00

73 lines
1.7 KiB
Go

package http
import (
"context"
"encoding/json"
"fmt"
"log"
"net/http"
"strings"
"github.com/micro/go-micro/v2/client/selector"
"github.com/micro/go-micro/v2/metadata"
"github.com/micro/go-micro/v2/registry"
)
// Write sets the status and body on a http ResponseWriter
func Write(w http.ResponseWriter, contentType string, status int, body string) {
w.Header().Set("Content-Length", fmt.Sprintf("%v", len(body)))
w.Header().Set("Content-Type", contentType)
w.WriteHeader(status)
fmt.Fprintf(w, `%v`, body)
}
// WriteBadRequestError sets a 400 status code
func WriteBadRequestError(w http.ResponseWriter, err error) {
rawBody, err := json.Marshal(map[string]string{
"error": err.Error(),
})
if err != nil {
WriteInternalServerError(w, err)
return
}
Write(w, "application/json", 400, string(rawBody))
}
// WriteInternalServerError sets a 500 status code
func WriteInternalServerError(w http.ResponseWriter, err error) {
rawBody, err := json.Marshal(map[string]string{
"error": err.Error(),
})
if err != nil {
log.Println(err)
return
}
Write(w, "application/json", 500, string(rawBody))
}
func NewRoundTripper(opts ...Option) http.RoundTripper {
options := Options{
Registry: registry.DefaultRegistry,
}
for _, o := range opts {
o(&options)
}
return &roundTripper{
rt: http.DefaultTransport,
st: selector.Random,
opts: options,
}
}
// RequestToContext puts the `Authorization` header bearer token into context
// so calls to services will be authorized.
func RequestToContext(r *http.Request) context.Context {
ctx := context.Background()
md := make(metadata.Metadata)
for k, v := range r.Header {
md[k] = strings.Join(v, ",")
}
return metadata.NewContext(ctx, md)
}