initial commit

vendor/github.com/go-chi/render/decoder.go

@@ -0,0 +1,57 @@
+package render
+
+import (
+	"encoding/json"
+	"encoding/xml"
+	"errors"
+	"io"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/ajg/form"
+)
+
+// Decode is a package-level variable set to our default Decoder. We do this
+// because it allows you to set render.Decode to another function with the
+// same function signature, while also utilizing the render.Decoder() function
+// itself. Effectively, allowing you to easily add your own logic to the package
+// defaults. For example, maybe you want to impose a limit on the number of
+// bytes allowed to be read from the request body.
+var Decode = DefaultDecoder
+
+// DefaultDecoder detects the correct decoder for use on an HTTP request and
+// marshals into a given interface.
+func DefaultDecoder(r *http.Request, v interface{}) error {
+	var err error
+
+	switch GetRequestContentType(r) {
+	case ContentTypeJSON:
+		err = DecodeJSON(r.Body, v)
+	case ContentTypeXML:
+		err = DecodeXML(r.Body, v)
+	case ContentTypeForm:
+		err = DecodeForm(r.Body, v)
+	default:
+		err = errors.New("render: unable to automatically decode the request content type")
+	}
+
+	return err
+}
+
+// DecodeJSON decodes a given reader into an interface using the json decoder.
+func DecodeJSON(r io.Reader, v interface{}) error {
+	defer io.Copy(ioutil.Discard, r) //nolint:errcheck
+	return json.NewDecoder(r).Decode(v)
+}
+
+// DecodeXML decodes a given reader into an interface using the xml decoder.
+func DecodeXML(r io.Reader, v interface{}) error {
+	defer io.Copy(ioutil.Discard, r) //nolint:errcheck
+	return xml.NewDecoder(r).Decode(v)
+}
+
+// DecodeForm decodes a given reader into an interface using the form decoder.
+func DecodeForm(r io.Reader, v interface{}) error {
+	decoder := form.NewDecoder(r) //nolint:errcheck
+	return decoder.Decode(v)
+}