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// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package httputil
import (
"encoding/json"
"io"
"net/http"
"unicode/utf8"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/util"
)
// UnmarshalJSONRequest into the given interface pointer. Returns an error JSON response if
// there was a problem unmarshalling. Calling this function consumes the request body.
func UnmarshalJSONRequest(req *http.Request, iface interface{}) *util.JSONResponse {
// encoding/json allows invalid utf-8, matrix does not
// https://matrix.org/docs/spec/client_server/r0.6.1#api-standards
body, err := io.ReadAll(req.Body)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("io.ReadAll failed")
resp := jsonerror.InternalServerError()
return &resp
}
return UnmarshalJSON(body, iface)
}
func UnmarshalJSON(body []byte, iface interface{}) *util.JSONResponse {
if !utf8.Valid(body) {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.NotJSON("Body contains invalid UTF-8"),
}
}
if err := json.Unmarshal(body, iface); err != nil {
// TODO: We may want to suppress the Error() return in production? It's useful when
// debugging because an error will be produced for both invalid/malformed JSON AND
// valid JSON with incorrect types for values.
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON("The request body could not be decoded into valid JSON. " + err.Error()),
}
}
return nil
}
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