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// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// 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 (
"context"
"encoding/json"
"fmt"
"net/http"
"reflect"
"github.com/matrix-org/util"
opentracing "github.com/opentracing/opentracing-go"
)
type InternalAPIError struct {
Type string
Message string
}
func (e InternalAPIError) Error() string {
return fmt.Sprintf("internal API returned %q error: %s", e.Type, e.Message)
}
func MakeInternalRPCAPI[reqtype, restype any](metricsName string, f func(context.Context, *reqtype, *restype) error) http.Handler {
return MakeInternalAPI(metricsName, func(req *http.Request) util.JSONResponse {
var request reqtype
var response restype
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
return util.MessageResponse(http.StatusBadRequest, err.Error())
}
if err := f(req.Context(), &request, &response); err != nil {
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: &InternalAPIError{
Type: reflect.TypeOf(err).String(),
Message: fmt.Sprintf("%s", err),
},
}
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: &response,
}
})
}
func MakeInternalProxyAPI[reqtype, restype any](metricsName string, f func(context.Context, *reqtype) (*restype, error)) http.Handler {
return MakeInternalAPI(metricsName, func(req *http.Request) util.JSONResponse {
var request reqtype
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
return util.MessageResponse(http.StatusBadRequest, err.Error())
}
response, err := f(req.Context(), &request)
if err != nil {
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: err,
}
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: response,
}
})
}
func CallInternalRPCAPI[reqtype, restype any](name, url string, client *http.Client, ctx context.Context, request *reqtype, response *restype) error {
span, ctx := opentracing.StartSpanFromContext(ctx, name)
defer span.Finish()
return PostJSON[reqtype, restype, InternalAPIError](ctx, span, client, url, request, response)
}
func CallInternalProxyAPI[reqtype, restype any, errtype error](name, url string, client *http.Client, ctx context.Context, request *reqtype) (restype, error) {
span, ctx := opentracing.StartSpanFromContext(ctx, name)
defer span.Finish()
var response restype
return response, PostJSON[reqtype, restype, errtype](ctx, span, client, url, request, &response)
}
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