Apache - 緩存來自應用程序服務器的響應

我有一個Web應用程序服務器，位於Apache 2.4.2後面的逆向代理配置中。該應用程序服務器返回包括下列頭的響應：Apache - 緩存來自應用程序服務器的響應

Pragma: no-cache 
Vary: Accept-Encoding 
Cache-Control: no-cache 
Expires: Mon, 07 Jan 2013 01:21:30 GMT

我的Apache 2.4.2工作在此應用程序服務器的前反向代理，並希望緩存從應用服務器的響應。我無法修改應用程序服務器。我如何在Apache中執行此操作？我對CacheStoreExpired和CacheIgnoreCacheControl充滿希望，但他們在這裏沒有幫助，因爲Apache向後端發出了一個有條件的請求 - 而且應用服務器總是希望用現在過期的新內容刷新緩存。我想知道我是否可以重寫從應用程序服務器返回的頭文件？

我使用mod_cache的（沒有用）這個配置：

CacheEnable disk/
CacheRoot "C:/Program Files/Apache Software Foundation/Apache2.4/cache/" 

CacheIgnoreCacheControl On 
CacheIgnoreNoLastMod On 
CacheStoreNoStore On 
CacheStoreExpired On 

CacheStaleOnError on 

LogLevel debug 
CacheHeader on 
CacheDetailHeader on 

CacheDefaultExpire 120 
CacheMaxExpire 120 

SetEnv proxy-nokeepalive 1 
ProxyPass/http://localhost:8080/

Apache的調試日誌是有點令人擔憂，也：

[Fri Jan 04 16:27:52.113857 2013] [cache:debug] [pid 2824:tid 964] cache_storage.c(624): [client 192.168.4.36:51783] AH00698: cache: Key for entity /browse?(null) is http://192.168.4.189:80/browse?, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:52.113857 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(159): [client 192.168.4.36:51783] AH00750: Adding CACHE_SAVE filter for /browse, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:52.113857 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(169): [client 192.168.4.36:51783] AH00751: Adding CACHE_REMOVE_URL filter for /browse, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.503049 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(1190): [client 192.168.4.36:51783] AH00769: cache: Caching url: /browse, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.503049 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(1196): [client 192.168.4.36:51783] AH00770: cache: Removing CACHE_REMOVE_URL filter., referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.643529 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(1318): [client 192.168.4.36:51783] AH00737: commit_entity: Headers and body for URL http://192.168.4.189:80/browse? cached., referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.799618 2013] [cache:debug] [pid 2824:tid 964] cache_storage.c(624): [client 192.168.4.36:51783] AH00698: cache: Key for entity /browse?(null) is http://192.168.4.189:80/browse?, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.799618 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(569): [client 192.168.4.36:51783] AH00709: Recalled cached URL info header http://192.168.4.189:80/browse?, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.799618 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(865): [client 192.168.4.36:51783] AH00720: Recalled headers for URL http://192.168.4.189:80/browse?, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.799618 2013] [cache:debug] [pid 2824:tid 964] cache_storage.c(320): [client 192.168.4.36:51783] AH00695: Cached response for /browse isn't fresh. Adding/replacing conditional request headers., referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.799618 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(159): [client 192.168.4.36:51783] AH00750: Adding CACHE_SAVE filter for /browse, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:53.799618 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(169): [client 192.168.4.36:51783] AH00751: Adding CACHE_REMOVE_URL filter for /browse, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.235637 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(1190): [client 192.168.4.36:51783] AH00769: cache: Caching url: /browse, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.235637 2013] [cache:debug] [pid 2824:tid 964] mod_cache.c(1196): [client 192.168.4.36:51783] AH00770: cache: Removing CACHE_REMOVE_URL filter., referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.298072 2013] [cache_disk:warn] [pid 2824:tid 964] (OS 5)Access is denied. : [client 192.168.4.36:51783] AH00699: rename tempfile to file failed: C:/Program Files/Apache Software Foundation/Apache2.4/cache/aptmpcJvfPV -> C:/Program Files/Apache Software Foundation/Apache2.4/cache/A/3/xM0hz_t8XPQaojszgaGA.data, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.298072 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(617): [client 192.168.4.36:51783] AH00711: Deleting C:/Program Files/Apache Software Foundation/Apache2.4/cache/A/3/xM0hz_t8XPQaojszgaGA.header from cache., referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.298072 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(634): [client 192.168.4.36:51783] AH00713: Deleting C:/Program Files/Apache Software Foundation/Apache2.4/cache/A/3/xM0hz_t8XPQaojszgaGA.data from cache., referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.298072 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(674): [client 192.168.4.36:51783] AH00715: Deleting directory C:/Program Files/Apache Software Foundation/Apache2.4/cache/A/3 from cache, referer: http://192.168.4.189/browse 
[Fri Jan 04 16:27:55.298072 2013] [cache_disk:debug] [pid 2824:tid 964] mod_cache_disk.c(1313): [client 192.168.4.36:51783] AH00736: commit_entity: URL 'http://192.168.4.189:80/browse?' not cached due to earlier disk error., referer: http://192.168.4.189/browse

來源

2013-01-07 dave

嗨戴夫，你有沒有想到你的配置有什麼問題？你是否修復了「由於較早的磁盤錯誤而未緩存」的錯誤？ – freedev

我放棄了！我認爲'重命名tempfile文件失敗'警告是Windows上的Apache（http://goo.gl/HPSb4）中的一個錯誤。 Mod_headers剝離了源服務器的反高速緩存響應（Header unset Expires），它允許Apache啓動緩存，但是然後mod_expires無法設置計算的過期，也不能將緩存頭重新插入緩存中的響應以防止在網絡中的其他地方緩存）。然後，當瀏覽器的請求包含max-age = 0（讓我驚慌）時，Apache從緩存中提供了一些東西。最終，我意識到我需要在應用程序層緩存，而不是HTTP。 – dave

你可以用mod_cache的

做到這一點

http://httpd.apache.org/docs/current/mod/mod_cache.html

請考慮同樣補充：

CacheIgnoreQueryString On

具有查詢字符串參數的請求在默認情況下不被緩存。

看着你的日誌，最後一行有錯誤：not cached due to earlier disk error。
可能是您的apache服務器沒有正確的權限寫入緩存目錄，或者您的磁盤已滿......
您應該仔細檢查apache memcache目錄是否已正確創建。

來源

2013-01-07 01:32:15 freedev

感謝您的輸入。我正在使用mod_cache，但你會建議什麼配置？（編輯原始帖子來顯示我當前的配置。） – dave

你的配置看起來正確。爲了理解錯在哪裏，我還需要Apache的響應返回的HTTP頭 – freedev

這實際上是Apache返回的頭文件。也許更有意思的是，我將添加一個Apache調試日誌的摘錄，顯示請求; fetch; cache; invalidate; refetch;服務由單個瀏覽器的請求引起。 – dave

Apache - 緩存來自應用程序服務器的響應

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