package cc.shinichi.library.glide.cache
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import com.bumptech.glide.load.Key
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import com.bumptech.glide.util.LruCache
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import com.bumptech.glide.util.Util
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import java.security.MessageDigest
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import java.security.NoSuchAlgorithmException
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/**
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* @author 工藤
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* @email qinglingou@gmail.com
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* create at 2018/5/10 11:11
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* description:
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*/
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class SafeKeyGenerator {
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private val loadIdToSafeHash = LruCache<Key, String>(1000)
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fun getSafeKey(key: Key): String? {
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var safeKey: String?
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synchronized(loadIdToSafeHash) { safeKey = loadIdToSafeHash[key] }
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if (safeKey == null) {
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try {
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val messageDigest = MessageDigest.getInstance("SHA-256")
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key.updateDiskCacheKey(messageDigest)
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safeKey = Util.sha256BytesToHex(messageDigest.digest())
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} catch (e: NoSuchAlgorithmException) {
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e.printStackTrace()
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} catch (e: Exception) {
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e.printStackTrace()
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}
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synchronized(loadIdToSafeHash) { loadIdToSafeHash.put(key, safeKey) }
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}
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return safeKey
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}
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}
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