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gitea/routers/api/v1/user/key.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

290 lines
7.7 KiB
Go

// Copyright 2015 The Gogs Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package user
import (
std_ctx "context"
"net/http"
asymkey_model "code.gitea.io/gitea/models/asymkey"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/models/perm"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/setting"
api "code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/routers/api/v1/repo"
"code.gitea.io/gitea/routers/api/v1/utils"
asymkey_service "code.gitea.io/gitea/services/asymkey"
"code.gitea.io/gitea/services/convert"
)
// appendPrivateInformation appends the owner and key type information to api.PublicKey
func appendPrivateInformation(ctx std_ctx.Context, apiKey *api.PublicKey, key *asymkey_model.PublicKey, defaultUser *user_model.User) (*api.PublicKey, error) {
if key.Type == asymkey_model.KeyTypeDeploy {
apiKey.KeyType = "deploy"
} else if key.Type == asymkey_model.KeyTypeUser {
apiKey.KeyType = "user"
if defaultUser.ID == key.OwnerID {
apiKey.Owner = convert.ToUser(ctx, defaultUser, defaultUser)
} else {
user, err := user_model.GetUserByID(db.DefaultContext, key.OwnerID)
if err != nil {
return apiKey, err
}
apiKey.Owner = convert.ToUser(ctx, user, user)
}
} else {
apiKey.KeyType = "unknown"
}
apiKey.ReadOnly = key.Mode == perm.AccessModeRead
return apiKey, nil
}
func composePublicKeysAPILink() string {
return setting.AppURL + "api/v1/user/keys/"
}
func listPublicKeys(ctx *context.APIContext, user *user_model.User) {
var keys []*asymkey_model.PublicKey
var err error
var count int
fingerprint := ctx.FormString("fingerprint")
username := ctx.Params("username")
if fingerprint != "" {
// Querying not just listing
if username != "" {
// Restrict to provided uid
keys, err = asymkey_model.SearchPublicKey(user.ID, fingerprint)
} else {
// Unrestricted
keys, err = asymkey_model.SearchPublicKey(0, fingerprint)
}
count = len(keys)
} else {
total, err2 := asymkey_model.CountPublicKeys(user.ID)
if err2 != nil {
ctx.InternalServerError(err)
return
}
count = int(total)
// Use ListPublicKeys
keys, err = asymkey_model.ListPublicKeys(user.ID, utils.GetListOptions(ctx))
}
if err != nil {
ctx.Error(http.StatusInternalServerError, "ListPublicKeys", err)
return
}
apiLink := composePublicKeysAPILink()
apiKeys := make([]*api.PublicKey, len(keys))
for i := range keys {
apiKeys[i] = convert.ToPublicKey(apiLink, keys[i])
if ctx.Doer.IsAdmin || ctx.Doer.ID == keys[i].OwnerID {
apiKeys[i], _ = appendPrivateInformation(ctx, apiKeys[i], keys[i], user)
}
}
ctx.SetTotalCountHeader(int64(count))
ctx.JSON(http.StatusOK, &apiKeys)
}
// ListMyPublicKeys list all of the authenticated user's public keys
func ListMyPublicKeys(ctx *context.APIContext) {
// swagger:operation GET /user/keys user userCurrentListKeys
// ---
// summary: List the authenticated user's public keys
// parameters:
// - name: fingerprint
// in: query
// description: fingerprint of the key
// type: string
// - name: page
// in: query
// description: page number of results to return (1-based)
// type: integer
// - name: limit
// in: query
// description: page size of results
// type: integer
// produces:
// - application/json
// responses:
// "200":
// "$ref": "#/responses/PublicKeyList"
listPublicKeys(ctx, ctx.Doer)
}
// ListPublicKeys list the given user's public keys
func ListPublicKeys(ctx *context.APIContext) {
// swagger:operation GET /users/{username}/keys user userListKeys
// ---
// summary: List the given user's public keys
// produces:
// - application/json
// parameters:
// - name: username
// in: path
// description: username of user
// type: string
// required: true
// - name: fingerprint
// in: query
// description: fingerprint of the key
// type: string
// - name: page
// in: query
// description: page number of results to return (1-based)
// type: integer
// - name: limit
// in: query
// description: page size of results
// type: integer
// responses:
// "200":
// "$ref": "#/responses/PublicKeyList"
listPublicKeys(ctx, ctx.ContextUser)
}
// GetPublicKey get a public key
func GetPublicKey(ctx *context.APIContext) {
// swagger:operation GET /user/keys/{id} user userCurrentGetKey
// ---
// summary: Get a public key
// produces:
// - application/json
// parameters:
// - name: id
// in: path
// description: id of key to get
// type: integer
// format: int64
// required: true
// responses:
// "200":
// "$ref": "#/responses/PublicKey"
// "404":
// "$ref": "#/responses/notFound"
key, err := asymkey_model.GetPublicKeyByID(ctx.ParamsInt64(":id"))
if err != nil {
if asymkey_model.IsErrKeyNotExist(err) {
ctx.NotFound()
} else {
ctx.Error(http.StatusInternalServerError, "GetPublicKeyByID", err)
}
return
}
apiLink := composePublicKeysAPILink()
apiKey := convert.ToPublicKey(apiLink, key)
if ctx.Doer.IsAdmin || ctx.Doer.ID == key.OwnerID {
apiKey, _ = appendPrivateInformation(ctx, apiKey, key, ctx.Doer)
}
ctx.JSON(http.StatusOK, apiKey)
}
// CreateUserPublicKey creates new public key to given user by ID.
func CreateUserPublicKey(ctx *context.APIContext, form api.CreateKeyOption, uid int64) {
content, err := asymkey_model.CheckPublicKeyString(form.Key)
if err != nil {
repo.HandleCheckKeyStringError(ctx, err)
return
}
key, err := asymkey_model.AddPublicKey(uid, form.Title, content, 0)
if err != nil {
repo.HandleAddKeyError(ctx, err)
return
}
apiLink := composePublicKeysAPILink()
apiKey := convert.ToPublicKey(apiLink, key)
if ctx.Doer.IsAdmin || ctx.Doer.ID == key.OwnerID {
apiKey, _ = appendPrivateInformation(ctx, apiKey, key, ctx.Doer)
}
ctx.JSON(http.StatusCreated, apiKey)
}
// CreatePublicKey create one public key for me
func CreatePublicKey(ctx *context.APIContext) {
// swagger:operation POST /user/keys user userCurrentPostKey
// ---
// summary: Create a public key
// consumes:
// - application/json
// produces:
// - application/json
// parameters:
// - name: body
// in: body
// schema:
// "$ref": "#/definitions/CreateKeyOption"
// responses:
// "201":
// "$ref": "#/responses/PublicKey"
// "422":
// "$ref": "#/responses/validationError"
form := web.GetForm(ctx).(*api.CreateKeyOption)
CreateUserPublicKey(ctx, *form, ctx.Doer.ID)
}
// DeletePublicKey delete one public key
func DeletePublicKey(ctx *context.APIContext) {
// swagger:operation DELETE /user/keys/{id} user userCurrentDeleteKey
// ---
// summary: Delete a public key
// produces:
// - application/json
// parameters:
// - name: id
// in: path
// description: id of key to delete
// type: integer
// format: int64
// required: true
// responses:
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
id := ctx.ParamsInt64(":id")
externallyManaged, err := asymkey_model.PublicKeyIsExternallyManaged(id)
if err != nil {
if asymkey_model.IsErrKeyNotExist(err) {
ctx.NotFound()
} else {
ctx.Error(http.StatusInternalServerError, "PublicKeyIsExternallyManaged", err)
}
return
}
if externallyManaged {
ctx.Error(http.StatusForbidden, "", "SSH Key is externally managed for this user")
return
}
if err := asymkey_service.DeletePublicKey(ctx.Doer, id); err != nil {
if asymkey_model.IsErrKeyAccessDenied(err) {
ctx.Error(http.StatusForbidden, "", "You do not have access to this key")
} else {
ctx.Error(http.StatusInternalServerError, "DeletePublicKey", err)
}
return
}
ctx.Status(http.StatusNoContent)
}