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gitea/routers/web/admin/config.go
Lunny Xiao bd820aa9c5
Add context cache as a request level cache (#22294)
To avoid duplicated load of the same data in an HTTP request, we can set
a context cache to do that. i.e. Some pages may load a user from a
database with the same id in different areas on the same page. But the
code is hidden in two different deep logic. How should we share the
user? As a result of this PR, now if both entry functions accept
`context.Context` as the first parameter and we just need to refactor
`GetUserByID` to reuse the user from the context cache. Then it will not
be loaded twice on an HTTP request.

But of course, sometimes we would like to reload an object from the
database, that's why `RemoveContextData` is also exposed.

The core context cache is here. It defines a new context
```go
type cacheContext struct {
	ctx  context.Context
	data map[any]map[any]any
        lock sync.RWMutex
}

var cacheContextKey = struct{}{}

func WithCacheContext(ctx context.Context) context.Context {
	return context.WithValue(ctx, cacheContextKey, &cacheContext{
		ctx:  ctx,
		data: make(map[any]map[any]any),
	})
}
```

Then you can use the below 4 methods to read/write/del the data within
the same context.

```go
func GetContextData(ctx context.Context, tp, key any) any
func SetContextData(ctx context.Context, tp, key, value any)
func RemoveContextData(ctx context.Context, tp, key any)
func GetWithContextCache[T any](ctx context.Context, cacheGroupKey string, cacheTargetID any, f func() (T, error)) (T, error)
```

Then let's take a look at how `system.GetString` implement it.

```go
func GetSetting(ctx context.Context, key string) (string, error) {
	return cache.GetWithContextCache(ctx, contextCacheKey, key, func() (string, error) {
		return cache.GetString(genSettingCacheKey(key), func() (string, error) {
			res, err := GetSettingNoCache(ctx, key)
			if err != nil {
				return "", err
			}
			return res.SettingValue, nil
		})
	})
}
```

First, it will check if context data include the setting object with the
key. If not, it will query from the global cache which may be memory or
a Redis cache. If not, it will get the object from the database. In the
end, if the object gets from the global cache or database, it will be
set into the context cache.

An object stored in the context cache will only be destroyed after the
context disappeared.
2023-02-15 21:37:34 +08:00

247 lines
7.4 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package admin
import (
"fmt"
"net/http"
"net/url"
"os"
"strconv"
"strings"
system_model "code.gitea.io/gitea/models/system"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/mailer"
"gitea.com/go-chi/session"
)
const tplConfig base.TplName = "admin/config"
// SendTestMail send test mail to confirm mail service is OK
func SendTestMail(ctx *context.Context) {
email := ctx.FormString("email")
// Send a test email to the user's email address and redirect back to Config
if err := mailer.SendTestMail(email); err != nil {
ctx.Flash.Error(ctx.Tr("admin.config.test_mail_failed", email, err))
} else {
ctx.Flash.Info(ctx.Tr("admin.config.test_mail_sent", email))
}
ctx.Redirect(setting.AppSubURL + "/admin/config")
}
func shadowPasswordKV(cfgItem, splitter string) string {
fields := strings.Split(cfgItem, splitter)
for i := 0; i < len(fields); i++ {
if strings.HasPrefix(fields[i], "password=") {
fields[i] = "password=******"
break
}
}
return strings.Join(fields, splitter)
}
func shadowURL(provider, cfgItem string) string {
u, err := url.Parse(cfgItem)
if err != nil {
log.Error("Shadowing Password for %v failed: %v", provider, err)
return cfgItem
}
if u.User != nil {
atIdx := strings.Index(cfgItem, "@")
if atIdx > 0 {
colonIdx := strings.LastIndex(cfgItem[:atIdx], ":")
if colonIdx > 0 {
return cfgItem[:colonIdx+1] + "******" + cfgItem[atIdx:]
}
}
}
return cfgItem
}
func shadowPassword(provider, cfgItem string) string {
switch provider {
case "redis":
return shadowPasswordKV(cfgItem, ",")
case "mysql":
// root:@tcp(localhost:3306)/macaron?charset=utf8
atIdx := strings.Index(cfgItem, "@")
if atIdx > 0 {
colonIdx := strings.Index(cfgItem[:atIdx], ":")
if colonIdx > 0 {
return cfgItem[:colonIdx+1] + "******" + cfgItem[atIdx:]
}
}
return cfgItem
case "postgres":
// user=jiahuachen dbname=macaron port=5432 sslmode=disable
if !strings.HasPrefix(cfgItem, "postgres://") {
return shadowPasswordKV(cfgItem, " ")
}
fallthrough
case "couchbase":
return shadowURL(provider, cfgItem)
// postgres://pqgotest:password@localhost/pqgotest?sslmode=verify-full
// Notice: use shadowURL
}
return cfgItem
}
// Config show admin config page
func Config(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("admin.config")
ctx.Data["PageIsAdmin"] = true
ctx.Data["PageIsAdminConfig"] = true
systemSettings, err := system_model.GetAllSettings()
if err != nil {
ctx.ServerError("system_model.GetAllSettings", err)
return
}
// All editable settings from UI
ctx.Data["SystemSettings"] = systemSettings
ctx.PageData["adminConfigPage"] = true
ctx.Data["CustomConf"] = setting.CustomConf
ctx.Data["AppUrl"] = setting.AppURL
ctx.Data["Domain"] = setting.Domain
ctx.Data["OfflineMode"] = setting.OfflineMode
ctx.Data["DisableRouterLog"] = setting.DisableRouterLog
ctx.Data["RunUser"] = setting.RunUser
ctx.Data["RunMode"] = util.ToTitleCase(setting.RunMode)
ctx.Data["GitVersion"] = git.VersionInfo()
ctx.Data["RepoRootPath"] = setting.RepoRootPath
ctx.Data["CustomRootPath"] = setting.CustomPath
ctx.Data["StaticRootPath"] = setting.StaticRootPath
ctx.Data["LogRootPath"] = setting.LogRootPath
ctx.Data["ScriptType"] = setting.ScriptType
ctx.Data["ReverseProxyAuthUser"] = setting.ReverseProxyAuthUser
ctx.Data["ReverseProxyAuthEmail"] = setting.ReverseProxyAuthEmail
ctx.Data["SSH"] = setting.SSH
ctx.Data["LFS"] = setting.LFS
ctx.Data["Service"] = setting.Service
ctx.Data["DbCfg"] = setting.Database
ctx.Data["Webhook"] = setting.Webhook
ctx.Data["MailerEnabled"] = false
if setting.MailService != nil {
ctx.Data["MailerEnabled"] = true
ctx.Data["Mailer"] = setting.MailService
}
ctx.Data["CacheAdapter"] = setting.CacheService.Adapter
ctx.Data["CacheInterval"] = setting.CacheService.Interval
ctx.Data["CacheConn"] = shadowPassword(setting.CacheService.Adapter, setting.CacheService.Conn)
ctx.Data["CacheItemTTL"] = setting.CacheService.TTL
sessionCfg := setting.SessionConfig
if sessionCfg.Provider == "VirtualSession" {
var realSession session.Options
if err := json.Unmarshal([]byte(sessionCfg.ProviderConfig), &realSession); err != nil {
log.Error("Unable to unmarshall session config for virtual provider config: %s\nError: %v", sessionCfg.ProviderConfig, err)
}
sessionCfg.Provider = realSession.Provider
sessionCfg.ProviderConfig = realSession.ProviderConfig
sessionCfg.CookieName = realSession.CookieName
sessionCfg.CookiePath = realSession.CookiePath
sessionCfg.Gclifetime = realSession.Gclifetime
sessionCfg.Maxlifetime = realSession.Maxlifetime
sessionCfg.Secure = realSession.Secure
sessionCfg.Domain = realSession.Domain
}
sessionCfg.ProviderConfig = shadowPassword(sessionCfg.Provider, sessionCfg.ProviderConfig)
ctx.Data["SessionConfig"] = sessionCfg
ctx.Data["Git"] = setting.Git
type envVar struct {
Name, Value string
}
envVars := map[string]*envVar{}
if len(os.Getenv("GITEA_WORK_DIR")) > 0 {
envVars["GITEA_WORK_DIR"] = &envVar{"GITEA_WORK_DIR", os.Getenv("GITEA_WORK_DIR")}
}
if len(os.Getenv("GITEA_CUSTOM")) > 0 {
envVars["GITEA_CUSTOM"] = &envVar{"GITEA_CUSTOM", os.Getenv("GITEA_CUSTOM")}
}
ctx.Data["EnvVars"] = envVars
ctx.Data["Loggers"] = setting.GetLogDescriptions()
ctx.Data["EnableAccessLog"] = setting.EnableAccessLog
ctx.Data["AccessLogTemplate"] = setting.AccessLogTemplate
ctx.Data["DisableRouterLog"] = setting.DisableRouterLog
ctx.Data["EnableXORMLog"] = setting.EnableXORMLog
ctx.Data["LogSQL"] = setting.Database.LogSQL
ctx.HTML(http.StatusOK, tplConfig)
}
func ChangeConfig(ctx *context.Context) {
key := strings.TrimSpace(ctx.FormString("key"))
if key == "" {
ctx.JSON(http.StatusOK, map[string]string{
"redirect": ctx.Req.URL.String(),
})
return
}
value := ctx.FormString("value")
version := ctx.FormInt("version")
if check, ok := changeConfigChecks[key]; ok {
if err := check(ctx, value); err != nil {
log.Warn("refused to set setting: %v", err)
ctx.JSON(http.StatusOK, map[string]string{
"err": ctx.Tr("admin.config.set_setting_failed", key),
})
return
}
}
if err := system_model.SetSetting(ctx, &system_model.Setting{
SettingKey: key,
SettingValue: value,
Version: version,
}); err != nil {
log.Error("set setting failed: %v", err)
ctx.JSON(http.StatusOK, map[string]string{
"err": ctx.Tr("admin.config.set_setting_failed", key),
})
return
}
ctx.JSON(http.StatusOK, map[string]interface{}{
"version": version + 1,
})
}
var changeConfigChecks = map[string]func(ctx *context.Context, newValue string) error{
system_model.KeyPictureDisableGravatar: func(_ *context.Context, newValue string) error {
if v, _ := strconv.ParseBool(newValue); setting.OfflineMode && !v {
return fmt.Errorf("%q should be true when OFFLINE_MODE is true", system_model.KeyPictureDisableGravatar)
}
return nil
},
system_model.KeyPictureEnableFederatedAvatar: func(_ *context.Context, newValue string) error {
if v, _ := strconv.ParseBool(newValue); setting.OfflineMode && v {
return fmt.Errorf("%q cannot be false when OFFLINE_MODE is true", system_model.KeyPictureEnableFederatedAvatar)
}
return nil
},
}