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72 lines
2.3 KiB
Go
72 lines
2.3 KiB
Go
// Copyright GoFrame Author(https://goframe.org). 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 gfile
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import (
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"context"
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"time"
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"github.com/gogf/gf/v2/internal/intlog"
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"github.com/gogf/gf/v2/os/gcache"
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"github.com/gogf/gf/v2/os/gcmd"
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"github.com/gogf/gf/v2/os/gfsnotify"
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)
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const (
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defaultCacheExpire = time.Minute // defaultCacheExpire is the expire time for file content caching in seconds.
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commandEnvKeyForCache = "gf.gfile.cache" // commandEnvKeyForCache is the configuration key for command argument or environment configuring cache expire duration.
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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 = gcmd.GetOptWithEnv(commandEnvKeyForCache, defaultCacheExpire).Duration()
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// internalCache is the memory cache for internal usage.
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internalCache = gcache.New()
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)
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// GetContentsWithCache 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 GetContentsWithCache(path string, duration ...time.Duration) string {
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return string(GetBytesWithCache(path, duration...))
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}
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// GetBytesWithCache 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 GetBytesWithCache(path string, duration ...time.Duration) []byte {
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var (
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ctx = context.Background()
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expire = cacheExpire
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cacheKey = commandEnvKeyForCache + path
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)
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if len(duration) > 0 {
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expire = duration[0]
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}
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r, _ := internalCache.GetOrSetFuncLock(ctx, cacheKey, func() (interface{}, error) {
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b := 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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_, err := internalCache.Remove(ctx, cacheKey)
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if err != nil {
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intlog.Error(ctx, err)
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}
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gfsnotify.Exit()
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})
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}
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return b, nil
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}, expire)
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if r != nil {
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return r.Bytes()
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}
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return nil
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}
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