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67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gfcache provides reading and caching for file contents.
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package gfcache
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import (
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"time"
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"github.com/gogf/gf/internal/cmdenv"
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"github.com/gogf/gf/os/gcache"
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"github.com/gogf/gf/os/gfile"
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"github.com/gogf/gf/os/gfsnotify"
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)
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const (
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// Default expire time for file content caching in seconds.
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gDEFAULT_CACHE_EXPIRE = time.Minute
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)
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var (
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// Default expire time for file content caching.
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cacheExpire = cmdenv.Get("gf.gfcache.expire", gDEFAULT_CACHE_EXPIRE).Duration()
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)
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// GetContents returns string content of given file by <path> from cache.
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// If there's no content in the cache, it will read it from disk file specified by <path>.
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// The parameter <expire> specifies the caching time for this file content in seconds.
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func GetContents(path string, duration ...time.Duration) string {
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return string(GetBinContents(path, duration...))
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}
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// GetBinContents returns []byte content of given file by <path> from cache.
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// If there's no content in the cache, it will read it from disk file specified by <path>.
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// The parameter <expire> specifies the caching time for this file content in seconds.
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func GetBinContents(path string, duration ...time.Duration) []byte {
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key := cacheKey(path)
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expire := cacheExpire
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if len(duration) > 0 {
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expire = duration[0]
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}
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r := gcache.GetOrSetFuncLock(key, func() interface{} {
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b := gfile.GetBytes(path)
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if b != nil {
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// Adding this <path> to gfsnotify,
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// it will clear its cache if there's any changes of the file.
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_, _ = gfsnotify.Add(path, func(event *gfsnotify.Event) {
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gcache.Remove(key)
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gfsnotify.Exit()
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})
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}
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return b
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}, expire)
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if r != nil {
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return r.([]byte)
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}
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return nil
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}
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// cacheKey produces the cache key for gcache.
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func cacheKey(path string) string {
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return "gf.gfcache:" + path
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}
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