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// -*- Mode: Go; indent-tabs-mode: t -*-
//go:build !nomanagers
// +build !nomanagers
/*
* Copyright (C) 2017-2022 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 configcore
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"gitee.com/mysnapcore/mysnapd/asserts"
"gitee.com/mysnapcore/mysnapd/dirs"
"gitee.com/mysnapcore/mysnapd/overlord/assertstate"
"gitee.com/mysnapcore/mysnapd/overlord/configstate/config"
"gitee.com/mysnapcore/mysnapd/overlord/devicestate"
)
var (
devicestateResetSession = devicestate.ResetSession
)
var proxyConfigKeys = map[string]bool{
"http_proxy": true,
"https_proxy": true,
"ftp_proxy": true,
"no_proxy": true,
}
func init() {
// add supported configuration of this module
supportedConfigurations["core.proxy.http"] = true
supportedConfigurations["core.proxy.https"] = true
supportedConfigurations["core.proxy.ftp"] = true
supportedConfigurations["core.proxy.no-proxy"] = true
supportedConfigurations["core.proxy.store"] = true
}
func etcEnvironment() string {
return filepath.Join(dirs.GlobalRootDir, "/etc/environment")
}
func updateEtcEnvironmentConfig(path string, config map[string]string) error {
f, err := os.OpenFile(path, os.O_RDONLY|os.O_CREATE, 0644)
if err != nil {
return err
}
defer f.Close()
toWrite, err := updateKeyValueStream(f, proxyConfigKeys, config)
if err != nil {
return err
}
if toWrite != nil {
// XXX: would be great to atomically write but /etc/environment
// is a single bind mount :/
return ioutil.WriteFile(path, []byte(strings.Join(toWrite, "\n")), 0644)
}
return nil
}
func handleProxyConfiguration(tr config.Conf, opts *fsOnlyContext) error {
config := map[string]string{}
// normal proxy settings
for _, key := range []string{"http", "https", "ftp"} {
output, err := coreCfg(tr, "proxy."+key)
if err != nil {
return err
}
config[key+"_proxy"] = output
}
// handle no_proxy
output, err := coreCfg(tr, "proxy.no-proxy")
if err != nil {
return err
}
config["no_proxy"] = output
if err := updateEtcEnvironmentConfig(etcEnvironment(), config); err != nil {
return err
}
return nil
}
func validateProxyStore(tr config.Conf) error {
proxyStore, err := coreCfg(tr, "proxy.store")
if err != nil {
return err
}
if proxyStore == "" {
return nil
}
st := tr.State()
st.Lock()
defer st.Unlock()
store, err := assertstate.Store(st, proxyStore)
if asserts.IsNotFound(err) {
return fmt.Errorf("cannot set proxy.store to %q without a matching store assertion", proxyStore)
}
if err == nil && store.URL() == nil {
return fmt.Errorf("cannot set proxy.store to %q with a matching store assertion with url unset", proxyStore)
}
return err
}
func handleProxyStore(tr config.Conf, opts *fsOnlyContext) error {
// is proxy.store being modififed?
proxyStoreInChanges := false
for _, name := range tr.Changes() {
if name == "core.proxy.store" {
proxyStoreInChanges = true
break
}
}
if !proxyStoreInChanges {
return nil
}
proxyStore, err := coreCfg(tr, "proxy.store")
if err != nil {
return err
}
var prevProxyStore string
if err := tr.GetPristine("core", "proxy.store", &prevProxyStore); err != nil && !config.IsNoOption(err) {
return err
}
if proxyStore != prevProxyStore {
// XXX ideally we should do this only when committing but we
// don't have infrastructure for that ATM, it just means the
// store will have to recreate the session.
// XXX the store code doesn't acquire the store ids and the
// session together atomically, this can be fixed only in a
// larger cleanup of how store.DeviceAndAuthContext
// operates. Hopefully it is atypical to set proxy.store while
// non-automatic store operations are happening, this approach
// is a best-effort for now.
state := tr.State()
state.Lock()
defer state.Unlock()
if err := devicestateResetSession(state); err != nil {
return err
}
}
return nil
}
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