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