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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package client
import (
"context"
"fmt"
"io"
"regexp"
"golang.org/x/xerrors"
)
// Icon represents the icon of an installed snap
type Icon struct {
Filename string
Content []byte
}
var contentDispositionMatcher = regexp.MustCompile(`attachment; filename=(.+)`).FindStringSubmatch
// Icon returns the Icon belonging to an installed snap
func (c *Client) Icon(pkgID string) (*Icon, error) {
const errPrefix = "cannot retrieve icon"
response, cancel, err := c.rawWithTimeout(context.Background(), "GET", fmt.Sprintf("/v2/icons/%s/icon", pkgID), nil, nil, nil, nil)
if err != nil {
fmt := "%s: failed to communicate with server: %w"
return nil, xerrors.Errorf(fmt, errPrefix, err)
}
defer cancel()
defer response.Body.Close()
if response.StatusCode != 200 {
return nil, fmt.Errorf("%s: Not Found", errPrefix)
}
matches := contentDispositionMatcher(response.Header.Get("Content-Disposition"))
if matches == nil || matches[1] == "" {
return nil, fmt.Errorf("%s: cannot determine filename", errPrefix)
}
content, err := io.ReadAll(response.Body)
if err != nil {
return nil, fmt.Errorf("%s: %s", errPrefix, err)
}
icon := &Icon{
Filename: matches[1],
Content: content,
}
return icon, nil
}
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