GoDoxy/internal/net/gphttp/middleware/errorpage/error_page.go
Yuzerion 4a8bd48ad5
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fix: optimize memory usage, fix agent and code refactor (#118)
* refactor: simplify io code and make utils module independent

* fix(docker): agent and socket-proxy docker event flushing with modified reverse proxy handler

* refactor: remove unused code

* refactor: remove the use of logging module in most code

* refactor: streamline domain mismatch check in certState function

* tweak: use ecdsa p-256 for autocert

* fix(tests): update health check tests for invalid host and add case for port in host

* feat(acme): custom acme directory

* refactor: code refactor and improved context and error handling

* tweak: optimize memory usage under load

* fix(oidc): restore old user matching behavior

* docs: add ChatGPT assistant to README

---------

Co-authored-by: yusing <yusing@6uo.me>
2025-05-25 09:45:57 +08:00

96 lines
2.3 KiB
Go

package errorpage
import (
"fmt"
"os"
"path"
"sync"
"github.com/rs/zerolog/log"
"github.com/yusing/go-proxy/internal/common"
"github.com/yusing/go-proxy/internal/gperr"
"github.com/yusing/go-proxy/internal/task"
U "github.com/yusing/go-proxy/internal/utils"
F "github.com/yusing/go-proxy/internal/utils/functional"
W "github.com/yusing/go-proxy/internal/watcher"
"github.com/yusing/go-proxy/internal/watcher/events"
)
const errPagesBasePath = common.ErrorPagesBasePath
var (
setupOnce sync.Once
dirWatcher W.Watcher
fileContentMap = F.NewMapOf[string, []byte]()
)
func setup() {
t := task.RootTask("error_page", false)
dirWatcher = W.NewDirectoryWatcher(t, errPagesBasePath)
loadContent()
go watchDir()
}
func GetStaticFile(filename string) ([]byte, bool) {
setupOnce.Do(setup)
return fileContentMap.Load(filename)
}
// try <statusCode>.html -> 404.html -> not ok.
func GetErrorPageByStatus(statusCode int) (content []byte, ok bool) {
content, ok = GetStaticFile(fmt.Sprintf("%d.html", statusCode))
if !ok && statusCode != 404 {
return fileContentMap.Load("404.html")
}
return
}
func loadContent() {
files, err := U.ListFiles(errPagesBasePath, 0)
if err != nil {
log.Err(err).Msg("failed to list error page resources")
return
}
for _, file := range files {
if fileContentMap.Has(file) {
continue
}
content, err := os.ReadFile(file)
if err != nil {
log.Warn().Err(err).Msgf("failed to read error page resource %s", file)
continue
}
file = path.Base(file)
log.Info().Msgf("error page resource %s loaded", file)
fileContentMap.Store(file, content)
}
}
func watchDir() {
eventCh, errCh := dirWatcher.Events(task.RootContext())
for {
select {
case <-task.RootContextCanceled():
return
case event, ok := <-eventCh:
if !ok {
return
}
filename := event.ActorName
switch event.Action {
case events.ActionFileWritten:
fileContentMap.Delete(filename)
loadContent()
case events.ActionFileDeleted:
fileContentMap.Delete(filename)
log.Warn().Msgf("error page resource %s deleted", filename)
case events.ActionFileRenamed:
log.Warn().Msgf("error page resource %s deleted", filename)
fileContentMap.Delete(filename)
loadContent()
}
case err := <-errCh:
gperr.LogError("error watching error page directory", err)
}
}
}