first commit

api/utils.go

@@ -0,0 +1,41 @@
+package api
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"net/http"
+
+	"github.com/pkg/errors"
+	"github.com/smallstep/ca-component/logging"
+)
+
+// LogError adds to the response writer the given error if it implements
+// logging.ResponseLogger. If it does not implement it, then writes the error
+// using the log package.
+func LogError(rw http.ResponseWriter, err error) {
+	if rl, ok := rw.(logging.ResponseLogger); ok {
+		rl.WithFields(map[string]interface{}{
+			"error": err,
+		})
+	} else {
+		log.Println(err)
+	}
+}
+
+// JSON writes the passed value into the http.ResponseWriter.
+func JSON(w http.ResponseWriter, v interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	if err := json.NewEncoder(w).Encode(v); err != nil {
+		LogError(w, err)
+	}
+}
+
+// ReadJSON reads JSON from the request body and stores it in the value
+// pointed by v.
+func ReadJSON(r io.Reader, v interface{}) error {
+	if err := json.NewDecoder(r).Decode(v); err != nil {
+		return BadRequest(errors.Wrap(err, "error decoding json"))
+	}
+	return nil
+}