forked from palantir/conjure-go-runtime
/
recovery.go
40 lines (34 loc) · 1.36 KB
/
recovery.go
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// Copyright (c) 2018 Palantir Technologies. All rights reserved.
//
// 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 httpclient
import (
"fmt"
"net/http"
werror "github.com/palantir/witchcraft-go-error"
)
// recoveryMiddleware recovers panics encountered during the request and returns them as an error.
type recoveryMiddleware struct{}
func (h recoveryMiddleware) RoundTrip(req *http.Request, next http.RoundTripper) (resp *http.Response, err error) {
defer func() {
if r := recover(); r != nil {
// panics contain function arguments (like maybe auth tokens), so we must log them unsafe.
if err == nil {
err = werror.Error("recovered panic", werror.UnsafeParam("recovered", fmt.Sprintf("%v", r)))
} else {
err = werror.Wrap(err, "recovered panic", werror.UnsafeParam("recovered", fmt.Sprintf("%v", r)))
}
}
}()
return next.RoundTrip(req)
}