mirror of https://github.com/jlelse/GoBlog
Improve Cache
This commit is contained in:
parent
8332d7ee43
commit
4ec97436ca
82
cache.go
82
cache.go
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@ -1,35 +1,30 @@
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package main
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package main
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import (
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import (
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"fmt"
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"io/ioutil"
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"io/ioutil"
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"net/http"
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"net/http"
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"net/http/httptest"
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"net/http/httptest"
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"sync"
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"strconv"
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"time"
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"time"
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"github.com/araddon/dateparse"
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lru "github.com/hashicorp/golang-lru"
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"golang.org/x/sync/singleflight"
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"golang.org/x/sync/singleflight"
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)
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)
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const (
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cacheInternalExpirationHeader = "GoBlog-Expire"
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)
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var (
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var (
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cacheGroup singleflight.Group
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cacheGroup singleflight.Group
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cacheMap = map[string]*cacheItem{}
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cacheLru *lru.Cache
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cacheMutex = &sync.RWMutex{}
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)
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)
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func initCache() {
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func initCache() (err error) {
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go func() {
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cacheLru, err = lru.New(200)
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for {
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return
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// GC the entries every 60 seconds
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time.Sleep(60 * time.Second)
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cacheMutex.Lock()
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for key, item := range cacheMap {
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if item.expired() {
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delete(cacheMap, key)
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}
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}
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cacheMutex.Unlock()
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}
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}()
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}
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}
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func cacheMiddleware(next http.Handler) http.Handler {
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func cacheMiddleware(next http.Handler) http.Handler {
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@ -38,24 +33,27 @@ func cacheMiddleware(next http.Handler) http.Handler {
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// check method
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// check method
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(r.Method == http.MethodGet || r.Method == http.MethodHead) &&
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(r.Method == http.MethodGet || r.Method == http.MethodHead) &&
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// check bypass query
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// check bypass query
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!(r.URL.Query().Get("cache") == "0") {
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!(r.URL.Query().Get("cache") == "0" || r.URL.Query().Get("cache") == "false") {
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key := cacheKey(r)
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key := cacheKey(r)
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// Get cache or render it
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// Get cache or render it
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cacheInterface, _, _ := cacheGroup.Do(key, func() (interface{}, error) {
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cacheInterface, _, _ := cacheGroup.Do(key, func() (interface{}, error) {
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return getCache(key, next, r), nil
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return getCache(key, next, r), nil
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})
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})
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cache := cacheInterface.(*cacheItem)
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cache := cacheInterface.(*cacheItem)
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// log.Println(string(cache.body))
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cacheTimeString := time.Unix(cache.creationTime, 0).Format(time.RFC1123)
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cacheTimeString := time.Unix(cache.creationTime, 0).Format(time.RFC1123)
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expiresTimeString := time.Unix(cache.creationTime+appConfig.Cache.Expiration, 0).Format(time.RFC1123)
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expiresTimeString := ""
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if cache.expiration != 0 {
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expiresTimeString = time.Unix(cache.creationTime+int64(cache.expiration), 0).Format(time.RFC1123)
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}
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// check conditional request
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// check conditional request
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ifModifiedSinceHeader := r.Header.Get("If-Modified-Since")
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if ifModifiedSinceHeader := r.Header.Get("If-Modified-Since"); ifModifiedSinceHeader != "" {
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if ifModifiedSinceHeader != "" && ifModifiedSinceHeader == cacheTimeString {
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if t, _ := dateparse.ParseIn(ifModifiedSinceHeader, time.Local); t.Unix() == cache.creationTime {
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setCacheHeaders(w, cacheTimeString, expiresTimeString)
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// send 304
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// send 304
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setCacheHeaders(w, cacheTimeString, expiresTimeString)
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w.WriteHeader(http.StatusNotModified)
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w.WriteHeader(http.StatusNotModified)
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return
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return
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}
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}
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}
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// copy cached headers
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// copy cached headers
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for k, v := range cache.header {
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for k, v := range cache.header {
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w.Header()[k] = v
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w.Header()[k] = v
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@ -77,27 +75,37 @@ func cacheKey(r *http.Request) string {
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}
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}
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func setCacheHeaders(w http.ResponseWriter, cacheTimeString string, expiresTimeString string) {
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func setCacheHeaders(w http.ResponseWriter, cacheTimeString string, expiresTimeString string) {
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w.Header().Set("Cache-Control", "public")
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w.Header().Del(cacheInternalExpirationHeader)
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w.Header().Set("Last-Modified", cacheTimeString)
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w.Header().Set("Last-Modified", cacheTimeString)
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if expiresTimeString != "" {
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// Set expires time
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w.Header().Set("Cache-Control", "public")
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w.Header().Set("Expires", expiresTimeString)
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w.Header().Set("Expires", expiresTimeString)
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} else {
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w.Header().Set("Cache-Control", fmt.Sprintf("public,max-age=%d", appConfig.Cache.Expiration))
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}
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}
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}
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type cacheItem struct {
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type cacheItem struct {
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creationTime int64
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creationTime int64
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expiration int
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code int
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code int
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header http.Header
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header http.Header
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body []byte
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body []byte
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}
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}
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func (c *cacheItem) expired() bool {
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func (c *cacheItem) expired() bool {
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return c.creationTime < time.Now().Unix()-appConfig.Cache.Expiration
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if c.expiration != 0 {
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return c.creationTime < time.Now().Unix()-int64(c.expiration)
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}
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return false
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}
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}
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func getCache(key string, next http.Handler, r *http.Request) *cacheItem {
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func getCache(key string, next http.Handler, r *http.Request) (item *cacheItem) {
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cacheMutex.RLock()
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if lruItem, ok := cacheLru.Get(key); ok {
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item, ok := cacheMap[key]
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item = lruItem.(*cacheItem)
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cacheMutex.RUnlock()
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}
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if !ok || item.expired() {
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if item == nil || item.expired() {
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// No cache available
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// No cache available
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// Record request
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// Record request
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recorder := httptest.NewRecorder()
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recorder := httptest.NewRecorder()
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// Cache values from recorder
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// Cache values from recorder
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result := recorder.Result()
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result := recorder.Result()
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body, _ := ioutil.ReadAll(result.Body)
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body, _ := ioutil.ReadAll(result.Body)
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exp, _ := strconv.Atoi(result.Header.Get(cacheInternalExpirationHeader))
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item = &cacheItem{
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item = &cacheItem{
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creationTime: time.Now().Unix(),
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creationTime: time.Now().Unix(),
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expiration: exp,
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code: result.StatusCode,
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code: result.StatusCode,
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header: result.Header,
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header: result.Header,
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body: body,
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body: body,
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}
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}
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// Save cache
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// Save cache
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cacheMutex.Lock()
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cacheLru.Add(key, item)
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cacheMap[key] = item
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cacheMutex.Unlock()
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}
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}
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return item
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return item
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}
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}
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func purgeCache() {
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func purgeCache() {
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cacheMutex.Lock()
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cacheLru.Purge()
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cacheMap = map[string]*cacheItem{}
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}
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cacheMutex.Unlock()
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func setInternalCacheExpirationHeader(w http.ResponseWriter, expiration int) {
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w.Header().Set(cacheInternalExpirationHeader, strconv.Itoa(expiration))
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}
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}
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type configCache struct {
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type configCache struct {
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Enable bool `mapstructure:"enable"`
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Enable bool `mapstructure:"enable"`
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Expiration int64 `mapstructure:"expiration"`
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Expiration int `mapstructure:"expiration"`
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}
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}
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type configBlog struct {
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type configBlog struct {
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@ -101,6 +101,7 @@ type customPage struct {
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Path string `mapstructure:"path"`
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Path string `mapstructure:"path"`
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Template string `mapstructure:"template"`
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Template string `mapstructure:"template"`
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Cache bool `mapstructure:"cache"`
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Cache bool `mapstructure:"cache"`
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CacheExpiration int `mapstructure:"cacheExpiration"`
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Data *interface{} `mapstructure:"data"`
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Data *interface{} `mapstructure:"data"`
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}
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}
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@ -4,6 +4,13 @@ import "net/http"
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func serveCustomPage(blog *configBlog, page *customPage) func(w http.ResponseWriter, r *http.Request) {
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func serveCustomPage(blog *configBlog, page *customPage) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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if appConfig.Cache != nil && appConfig.Cache.Enable && page.Cache {
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if page.CacheExpiration != 0 {
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setInternalCacheExpirationHeader(w, page.CacheExpiration)
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} else {
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setInternalCacheExpirationHeader(w, int(appConfig.Cache.Expiration))
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}
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}
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render(w, page.Template, &renderData{
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render(w, page.Template, &renderData{
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Blog: blog,
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Blog: blog,
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Canonical: appConfig.Server.PublicAddress + page.Path,
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Canonical: appConfig.Server.PublicAddress + page.Path,
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5
go.mod
5
go.mod
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@ -17,6 +17,7 @@ require (
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github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
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github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
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github.com/gorilla/feeds v1.1.1
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github.com/gorilla/feeds v1.1.1
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github.com/gorilla/handlers v1.5.1
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github.com/gorilla/handlers v1.5.1
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github.com/hashicorp/golang-lru v0.5.4
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github.com/jeremywohl/flatten v1.0.1
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github.com/jeremywohl/flatten v1.0.1
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github.com/json-iterator/go v1.1.10
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github.com/json-iterator/go v1.1.10
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github.com/klauspost/cpuid v1.3.1 // indirect
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github.com/klauspost/cpuid v1.3.1 // indirect
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@ -51,9 +52,9 @@ require (
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golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
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golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
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golang.org/x/net v0.0.0-20201110031124-69a78807bb2b // indirect
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golang.org/x/net v0.0.0-20201110031124-69a78807bb2b // indirect
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golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
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golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
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golang.org/x/sys v0.0.0-20201116194326-cc9327a14d48 // indirect
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 // indirect
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golang.org/x/text v0.3.4 // indirect
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golang.org/x/text v0.3.4 // indirect
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golang.org/x/tools v0.0.0-20201117152513-9036a0f9af11 // indirect
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golang.org/x/tools v0.0.0-20201120032337-6d151481565c // indirect
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gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
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gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
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gopkg.in/ini.v1 v1.62.0 // indirect
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gopkg.in/ini.v1 v1.62.0 // indirect
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gopkg.in/yaml.v2 v2.3.0 // indirect
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gopkg.in/yaml.v2 v2.3.0 // indirect
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10
go.sum
10
go.sum
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@ -134,6 +134,8 @@ github.com/hashicorp/go-uuid v1.0.1/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/b
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github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA0oac0k90=
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github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA0oac0k90=
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github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
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github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
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github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
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github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
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github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
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github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
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github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO+LraFDTW64=
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github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO+LraFDTW64=
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|
@ -427,8 +429,8 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
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golang.org/x/sys v0.0.0-20200724161237-0e2f3a69832c h1:UIcGWL6/wpCfyGuJnRFJRurA+yj8RrW7Q6x2YMCXt6c=
|
golang.org/x/sys v0.0.0-20200724161237-0e2f3a69832c h1:UIcGWL6/wpCfyGuJnRFJRurA+yj8RrW7Q6x2YMCXt6c=
|
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golang.org/x/sys v0.0.0-20200724161237-0e2f3a69832c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
golang.org/x/sys v0.0.0-20200724161237-0e2f3a69832c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
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golang.org/x/sys v0.0.0-20201116194326-cc9327a14d48 h1:AYCWBZhgIw6XobZ5CibNJr0Rc4ZofGGKvWa1vcx2IGk=
|
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
|
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golang.org/x/sys v0.0.0-20201116194326-cc9327a14d48/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
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golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
|
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
|
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golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
|
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
|
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
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|
@ -465,8 +467,8 @@ golang.org/x/tools v0.0.0-20191216052735-49a3e744a425 h1:VvQyQJN0tSuecqgcIxMWnnf
|
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golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
|
golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
|
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golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
|
golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
|
||||||
golang.org/x/tools v0.0.0-20200410194907-79a7a3126eef/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
|
golang.org/x/tools v0.0.0-20200410194907-79a7a3126eef/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
|
||||||
golang.org/x/tools v0.0.0-20201117152513-9036a0f9af11 h1:gqcmLJzeDSNhSzkyhJ4kxP6CtTimi/5hWFDGp0lFd1w=
|
golang.org/x/tools v0.0.0-20201120032337-6d151481565c h1:IXtuZap6vTKIQ3jemmcwf2gY4BT+lwfZHBYwxMGe5/k=
|
||||||
golang.org/x/tools v0.0.0-20201117152513-9036a0f9af11/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
|
golang.org/x/tools v0.0.0-20201120032337-6d151481565c/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
|
||||||
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||||
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||||
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
|
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
|
||||||
|
|
6
main.go
6
main.go
|
@ -44,6 +44,11 @@ func main() {
|
||||||
log.Fatal(err)
|
log.Fatal(err)
|
||||||
return
|
return
|
||||||
}
|
}
|
||||||
|
err = initCache()
|
||||||
|
if err != nil {
|
||||||
|
log.Fatal(err)
|
||||||
|
return
|
||||||
|
}
|
||||||
err = initRegexRedirects()
|
err = initRegexRedirects()
|
||||||
if err != nil {
|
if err != nil {
|
||||||
log.Fatal(err)
|
log.Fatal(err)
|
||||||
|
@ -56,7 +61,6 @@ func main() {
|
||||||
}
|
}
|
||||||
initTelegram()
|
initTelegram()
|
||||||
initWebmention()
|
initWebmention()
|
||||||
initCache()
|
|
||||||
initNodeInfo()
|
initNodeInfo()
|
||||||
|
|
||||||
// Start cron hooks
|
// Start cron hooks
|
||||||
|
|
Loading…
Reference in New Issue