VXML網關無法在檔案成功載入後快取音訊檔案
簡介
本檔案介紹如何在成功載入語音可擴充標籤語言(VXML)閘道中排解音訊檔案快取問題的疑難問題。
必要條件
需求
思科建議您瞭解以下主題：
Cisco Unified Contact Center Enterprise(UCCE)綜合呼叫流程
採用元件
本文件所述內容不限於特定軟體和硬體版本。
問題
當呼叫者撥打聯絡中心號碼時，會聽到幾秒鐘的靜音，然後顯示音訊提示。
驗證VXML網關後，來自主思科語音門戶(CVP)媒體伺服器的音訊檔案不在快取中，而來自輔助CVP媒體伺服器快取的音訊檔案相同。
手動從CVP主媒體伺服器載入音訊檔案，顯示成功，但該檔案列為非快取條目。
Non-cached entries
==================
Ref Size
--- ----
1 17810
url: http://10.66.75.48/en-us/app/test/2.wav
1 17810
url: http://10.66.75.48/en-us/app/test/3.wav
疑難排解
啟用dubug http client all，然後進行測試呼叫。
在日誌中，有一個屬性
Cache-Control:no-cache
Jan 10 03:05:13.949 UTC: //1268364//HTTPC:/httpc_msg_read: Start processing 536 bytes data Jan 10 03:05:13.949 UTC: //1268364//HTTPC:/httpc_msg_read: Stored msg. body: len=536 Jan 10 03:05:13.953 UTC: //1268364//HTTPC:/httpc_socket_read: socket readable fd: 0 Jan 10 03:05:13.953 UTC: //1268364//HTTPC:/httpc_socket_read: Jan 10 03:05:13.953 UTC: read data from the socket 0 : first 400 bytes of data: <?xpacket end="w"?> Cr8rT(Unprintable char...)000FFFFFFBEFFFFFFEFFFFFFFCAFFFFFFFE000540100000000000000000000000000000000000000000041646F626520536F756E64626F6F7468204353352028584D50446F634F7073044495350400010004C495354FFFFFF92000494E464F494352441A000323031362D30332D30315431353A32303A30332D30363A30300494152540000494E414D0000 Jan 10 03:05:13.953 UTC: //1268364//HTTPC:/httpc_msg_read: Start processing 492 bytes data Jan 10 03:05:13.953 UTC: //1268364//HTTPC:/httpc_msg_read: Stored msg. body: len=492 Jan 10 03:05:13.953 UTC: //1268364//HTTPC:/httpc_socket_read: MSG_COMPLETE: rsp_code(200),msg(185FD39C)URL:http://media/en-us/app/Beacon/ROS_Monitor.wav, fd(0) Jan 10 03:05:13.953 UTC: processing server rsp msg: msg(185FD39C)URL:http://media/en-us/app/Beacon/xxxxxx.wav, fd(0): Jan 10 03:05:13.953 UTC: Request msg: GET /en-us/app/Beacon/ROS_Monitor.wav HTTP/1.1 Jan 10 03:05:13.953 UTC: Message Response Code: 200 Jan 10 03:05:13.953 UTC: Message Rsp Decoded Headers: Jan 10 03:05:13.953 UTC: Cache-Control:no-cache Jan 10 03:05:13.953 UTC: Date:Wed, 10 Jan 2018 03:05:09 GMT Jan 10 03:05:13.953 UTC: Content-Length:114386 Jan 10 03:05:13.953 UTC: Content-Type:audio/wav Jan 10 03:05:13.953 UTC: ETag:"e9d02a87074d11:0" Jan 10 03:05:13.953 UTC: Last-Modified:Tue, 01 Mar 2016 21:22:58 GMT Jan 10 03:05:13.953 UTC: headers: Jan 10 03:05:13.953 UTC: HTTP/1.1 200 OK Cache-Control: no-cache Content-Type: audio/wav Last-Modified: Tue, 01 Mar 2016 21:22:58 GMT Accept-Ranges: bytes ETag: "e9d02a87074d11:0" Server: Microsoft-IIS/7.5 X-Powered-By: ASP.NET Date: Wed, 10 Jan 2018 03:05:09 GMT Content-Length: 114386
解決方案
問題的根本原因是在實驗室重建後發現的。為了重新建立場景，我們採取了以下步驟：
步驟1.在CVP媒體伺服器下，在此檔案路徑中建立測試資料夾：
C:\inetpub\wwwroot\en-us\app
步驟2.在IIS管理器下，找到剛建立的資料夾，然後按兩下該資料夾
步驟3.按兩下HTTP響應報頭，如下圖所示
步驟4.按一下右側面板上的add並輸入屬性，如下圖所示
名稱: 快取控制
值：no-cache
驗證
步驟1.在IIS測試資料夾中新增屬性之前，載入音訊檔案CVP Media server IP address/en-us/app/test1.wav
Cached entries
==============
entry 150, 1 entries
Ref FreshTime Age Size context
--- --------- --- ---- -------
2 86400 360 17810 0
url: http://10.66.75.48/en-us/app/test/1.wav
步驟2.新增值為no-cache的Cache-control，並從測試資料夾載入音訊檔案
10.66.75.48/en-us/app/test/2.wav
10.66.75.48/en-us/app/test/3.wav
這兩個音訊檔案現在列在非快取條目中：
Cached entries
==============
entry 150, 1 entries
Ref FreshTime Age Size context
--- --------- --- ---- -------
2 86400 360 17810 0
url: http://10.66.75.48/en-us/app/test/1.wav
Non-cached entries
==================
Ref Size
--- ----
1 17810
url: http://10.66.75.48/en-us/app/test/2.wav
1 17810
url: http://10.66.75.48/en-us/app/test/3.wav
步驟3.從其他資料夾載入音訊檔案
10.66.75.48/en-us/app/whisper.wav
它只顯示受屬性影響的測試資料夾。
Maximum memory pool allowed for HTTP Client caching = 15000 K-bytes
Maximum file size allowed for caching = 500 K-bytes
Total memory used up for Cache = 36901 Bytes
Message response timeout = 30 secs
Total cached entries = 2
Total non-cached entries = 2
Cached entries
==============
entry 150, 1 entries
Ref FreshTime Age Size context
--- --------- --- ---- -------
2 86400 360 17810 0
url: http://10.66.75.48/en-us/app/test/1.wav
entry 166, 1 entries
Ref FreshTime Age Size context
--- --------- --- ---- -------
1 4691902 2495 17810 0
url: http://10.66.75.48/en-us/app/whisper.wav
Non-cached entries
==================
Ref Size
--- ----
1 17810
url: http://10.66.75.48/en-us/app/test/2.wav
1 17810
url: http://10.66.75.48/en-us/app/test/3.wav
意見