mirror of https://github.com/dapr/go-sdk.git
75 lines
1.7 KiB
Go
Executable File
75 lines
1.7 KiB
Go
Executable File
package http
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"github.com/dapr/go-sdk/service/common"
|
|
)
|
|
|
|
// AddServiceInvocationHandler appends provided service invocation handler with its route to the service
|
|
func (s *Server) AddServiceInvocationHandler(route string, fn func(ctx context.Context, in *common.InvocationEvent) (out *common.Content, err error)) error {
|
|
if route == "" {
|
|
return fmt.Errorf("service route required")
|
|
}
|
|
if fn == nil {
|
|
return fmt.Errorf("invocation handler required")
|
|
}
|
|
|
|
if !strings.HasPrefix(route, "/") {
|
|
route = fmt.Sprintf("/%s", route)
|
|
}
|
|
|
|
s.mux.Handle(route, optionsHandler(http.HandlerFunc(
|
|
func(w http.ResponseWriter, r *http.Request) {
|
|
// capture http args
|
|
e := &common.InvocationEvent{
|
|
Verb: r.Method,
|
|
QueryString: valuesToMap(r.URL.Query()),
|
|
ContentType: r.Header.Get("Content-type"),
|
|
}
|
|
|
|
// check for post with no data
|
|
if r.ContentLength > 0 {
|
|
content, err := ioutil.ReadAll(r.Body)
|
|
if err != nil {
|
|
http.Error(w, err.Error(), http.StatusBadRequest)
|
|
return
|
|
}
|
|
e.Data = content
|
|
}
|
|
|
|
// execute handler
|
|
o, err := fn(r.Context(), e)
|
|
if err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
// write to response if handler returned data
|
|
if o != nil && o.Data != nil {
|
|
if _, err := w.Write(o.Data); err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
if o.ContentType != "" {
|
|
w.Header().Set("Content-type", o.ContentType)
|
|
}
|
|
}
|
|
})))
|
|
|
|
return nil
|
|
}
|
|
|
|
func valuesToMap(in url.Values) map[string]string {
|
|
out := map[string]string{}
|
|
for k := range in {
|
|
out[k] = in.Get(k)
|
|
}
|
|
return out
|
|
}
|