gotosocial/internal/cache/status.go
tobi c3b6a5b0f9
[feature] Implement cache-control and etags for static assets (#711)
* start working on etag stuff

* add + use cache middleware

* generate etags on the fly

* remove unused field

* clean up filepath

* add license headers to cache files

* add attachgroup function to router interface

* move cache into web module

* rename a couple things

* remove attachStaticFS function from router

* rename + tidy up a few things

* mount assets filesystem

* create assetsFileInfoCache

* update comment

* simplify hash

* fix string fmt

* skip last mod chk, prefer strong etags w/long cache

* move base handler to its own file
this matches the modules in the api folder

* generate new etag if file was modified

* wrap strong etag in quotation marks as per spec

* clarify logic in avatar search

* make hashing a little niftier
2022-07-18 12:55:06 +02:00

133 lines
4.8 KiB
Go

/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cache
import (
"time"
"codeberg.org/gruf/go-cache/v2"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
// StatusCache is a cache wrapper to provide URL and URI lookups for gtsmodel.Status
type StatusCache struct {
cache cache.LookupCache[string, string, *gtsmodel.Status]
}
// NewStatusCache returns a new instantiated statusCache object
func NewStatusCache() *StatusCache {
c := &StatusCache{}
c.cache = cache.NewLookup(cache.LookupCfg[string, string, *gtsmodel.Status]{
RegisterLookups: func(lm *cache.LookupMap[string, string]) {
lm.RegisterLookup("uri")
lm.RegisterLookup("url")
},
AddLookups: func(lm *cache.LookupMap[string, string], status *gtsmodel.Status) {
if uri := status.URI; uri != "" {
lm.Set("uri", uri, status.ID)
}
if url := status.URL; url != "" {
lm.Set("url", url, status.ID)
}
},
DeleteLookups: func(lm *cache.LookupMap[string, string], status *gtsmodel.Status) {
if uri := status.URI; uri != "" {
lm.Delete("uri", uri)
}
if url := status.URL; url != "" {
lm.Delete("url", url)
}
},
})
c.cache.SetTTL(time.Minute*5, false)
c.cache.Start(time.Second * 10)
return c
}
// GetByID attempts to fetch a status from the cache by its ID, you will receive a copy for thread-safety
func (c *StatusCache) GetByID(id string) (*gtsmodel.Status, bool) {
return c.cache.Get(id)
}
// GetByURL attempts to fetch a status from the cache by its URL, you will receive a copy for thread-safety
func (c *StatusCache) GetByURL(url string) (*gtsmodel.Status, bool) {
return c.cache.GetBy("url", url)
}
// GetByURI attempts to fetch a status from the cache by its URI, you will receive a copy for thread-safety
func (c *StatusCache) GetByURI(uri string) (*gtsmodel.Status, bool) {
return c.cache.GetBy("uri", uri)
}
// Put places a status in the cache, ensuring that the object place is a copy for thread-safety
func (c *StatusCache) Put(status *gtsmodel.Status) {
if status == nil || status.ID == "" {
panic("invalid status")
}
c.cache.Set(status.ID, copyStatus(status))
}
// copyStatus performs a surface-level copy of status, only keeping attached IDs intact, not the objects.
// due to all the data being copied being 99% primitive types or strings (which are immutable and passed by ptr)
// this should be a relatively cheap process
func copyStatus(status *gtsmodel.Status) *gtsmodel.Status {
return &gtsmodel.Status{
ID: status.ID,
URI: status.URI,
URL: status.URL,
Content: status.Content,
AttachmentIDs: status.AttachmentIDs,
Attachments: nil,
TagIDs: status.TagIDs,
Tags: nil,
MentionIDs: status.MentionIDs,
Mentions: nil,
EmojiIDs: status.EmojiIDs,
Emojis: nil,
CreatedAt: status.CreatedAt,
UpdatedAt: status.UpdatedAt,
Local: status.Local,
AccountID: status.AccountID,
Account: nil,
AccountURI: status.AccountURI,
InReplyToID: status.InReplyToID,
InReplyTo: nil,
InReplyToURI: status.InReplyToURI,
InReplyToAccountID: status.InReplyToAccountID,
InReplyToAccount: nil,
BoostOfID: status.BoostOfID,
BoostOf: nil,
BoostOfAccountID: status.BoostOfAccountID,
BoostOfAccount: nil,
ContentWarning: status.ContentWarning,
Visibility: status.Visibility,
Sensitive: status.Sensitive,
Language: status.Language,
CreatedWithApplicationID: status.CreatedWithApplicationID,
Federated: status.Federated,
Boostable: status.Boostable,
Replyable: status.Replyable,
Likeable: status.Likeable,
ActivityStreamsType: status.ActivityStreamsType,
Text: status.Text,
Pinned: status.Pinned,
}
}