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// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package gtserror
import (
"errors"
"net/http"
"codeberg.org/gruf/go-byteutil"
)
// NewResponseError crafts an error from provided HTTP response
// including the method, status and body (if any provided). This
// will also wrap the returned error using WithStatusCode().
func NewResponseError(rsp *http.Response) error {
var buf byteutil.Buffer
// Get URL string ahead of time.
urlStr := rsp.Request.URL.String()
// Alloc guesstimate of required buf size.
buf.Guarantee(0 +
len(rsp.Request.Method) +
12 + // request to
len(urlStr) +
17 + // failed: status="
len(rsp.Status) +
8 + // " body="
256 + // max body size
1, // "
)
// Build error message string without
// using "fmt", as chances are this will
// be used in a hot code path and we
// know all the incoming types involved.
_, _ = buf.WriteString(rsp.Request.Method)
_, _ = buf.WriteString(" request to ")
_, _ = buf.WriteString(urlStr)
_, _ = buf.WriteString(" failed: status=\"")
_, _ = buf.WriteString(rsp.Status)
_, _ = buf.WriteString("\" body=\"")
_, _ = buf.WriteString(drainBody(rsp.Body, 256))
_, _ = buf.WriteString("\"")
// Create new error from msg.
err := errors.New(buf.String())
// Wrap error to provide status code.
return WithStatusCode(err, rsp.StatusCode)
}
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