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    #1

    FileDownload question

    We are using the com.isomorphic.servlet.FileDownload class for serving all isomorphic related files. However, none of the files (especially important are the .js files, which together accounts for 400k of the response data) seem to be cached by the browser, even though in the http response and requests the Last-Modified time match up. Is the FileDownload servlet never allowing browser caching or is there some setup that needs to be done?
    Tags: None
    #2
    You can use Firebug to inspect the HTTP response headers (the only thing the browser sees, of course). Your code or your application server may be adding headers that prevent caching.

    Comment

      #3
      this is what i see in the firefox response and request headers. Our code does not add any headers since the web.xml is configured to use the FileDownload servlet directly. If the browser asks for validation of the resource, isn't the servlet supposed to return 304 Not Modified as the response status if it verified the resource is still the same? Currently it always returns 200 OK as the response.

      Code:
      Response Headersview source
Content-Type	application/x-javascript
Last-Modified	Tue, 12 May 2009 19:02:49 GMT
Expires	Thu, 11 Mar 2010 17:12:47 GMT
Content-Encoding	gzip
Content-Length	19194
Server	Jetty(6.1.15)
Request Headersview source
Host	localhost:8088
User-Agent	Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)
Accept	*/*
Accept-Encoding	gzip,deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive	300
Connection	keep-alive
Referer	http://localhost:8088/cwf/login
Cookie	JSESSIONID=vsqpzfw98hbh; GLog=%7B%0D%20%20%20%20left%3A-4%2C%20%0D%20%20%20%20top%3A-4%2C%20%0D%20%20%20%20width%3A1680%2C%20%0D%20%20%20%20height%3A939%2C%20%0D%20%20%20%20priorityDefaults%3A%7B%0D%20%20%20%20%20%20%20%20Log%3A4%0D%20%20%20%20%7D%2C%20%0D%20%20%20%20defaultPriority%3A3%0D%7D
If-Modified-Since	Tue, 12 May 2009 19:02:49 GMT
Cache-Control	max-age=0

      Comment

        #4
        The FileDownload servlet does indeed check for staleness and issue 304 Not Modified responses. The problem is here is most likely that this file was not actually served by the FileDownload Servlet - it's missing telltale headers.

        Try enabling verbose logging for the servlet in log4j.isc.config.xml (or your equivalent file, if you've replaced this):

        Code:
        	<category name="com.isomorphic.download.Download">
	  <priority value="EDBUG" />
	</category>
        If you see nothing, the FileDownload servlet is not involved and you should look closely at web.xml and the request paths for these files. If you do see logs, post them here.

        Comment

          #5
          The following is the pasted log from enabling debug on Download. The pasted section are the lines relevant to files served by FileDownload

          Code:
          14:56:19.988 [862961@qtp-6137085-3] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_Grids.js'
Path Info: '/ISC_Grids.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_Grids.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_Grids.js'
14:56:19.988 [862961@qtp-6137085-3] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_Grids.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.003 [862961@qtp-6137085-3] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_Grids.js
14:56:19.988 [21959354@qtp-6137085-5] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_History.js'
Path Info: '/ISC_History.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_History.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_History.js'
14:56:19.972 [3006512@qtp-6137085-6] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_Containers.js'
Path Info: '/ISC_Containers.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_Containers.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_Containers.js'
14:56:20.003 [3006512@qtp-6137085-6] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_Containers.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.003 [3006512@qtp-6137085-6] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_Containers.js
14:56:19.972 [15103247@qtp-6137085-7] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_Foundation.js'
Path Info: '/ISC_Foundation.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_Foundation.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_Foundation.js'
14:56:20.003 [15103247@qtp-6137085-7] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_Foundation.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.003 [15103247@qtp-6137085-7] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_Foundation.js
14:56:20.003 [3006512@qtp-6137085-6] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.003 [21959354@qtp-6137085-5] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_History.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.003 [21959354@qtp-6137085-5] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_History.js
14:56:20.003 [862961@qtp-6137085-3] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.003 [2330238@qtp-6137085-8] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_Core.js'
Path Info: '/ISC_Core.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_Core.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_Core.js'
14:56:20.003 [2330238@qtp-6137085-8] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_Core.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.003 [2330238@qtp-6137085-8] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_Core.js
14:56:19.988 [11674406@qtp-6137085-4] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/cwgwt/velocity/velocity.nocache.js
14:56:20.019 [2330238@qtp-6137085-8] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.003 [21959354@qtp-6137085-5] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.003 [3006512@qtp-6137085-6] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Containers.js
14:56:20.003 [862961@qtp-6137085-3] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Grids.js
14:56:20.003 [15103247@qtp-6137085-7] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.019 [15103247@qtp-6137085-7] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Foundation.js
14:56:20.019 [3006512@qtp-6137085-6] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Containers.js
14:56:20.019 [11674406@qtp-6137085-4] DEBUG c.i.timing.Timing - Request: /cwf/cwgwt/velocity/velocity.nocache.js (start->finish): 63ms
14:56:20.066 [11674406@qtp-6137085-4] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_Forms.js'
Path Info: '/ISC_Forms.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_Forms.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_Forms.js'
14:56:20.066 [11674406@qtp-6137085-4] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_Forms.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.066 [11674406@qtp-6137085-4] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_Forms.js
14:56:20.019 [21959354@qtp-6137085-5] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_History.js
14:56:20.019 [2330238@qtp-6137085-8] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Core.js
14:56:20.050 [862961@qtp-6137085-3] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Grids.js
14:56:20.128 [862961@qtp-6137085-3] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_Grids.js (start->finish): 140ms
14:56:20.128 [862961@qtp-6137085-3] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/skins'
Request URI: '/cwf/isomorphic/skins/Enterprise/load_skin.js'
Path Info: '/Enterprise/load_skin.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\Enterprise\load_skin.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\skins\Enterprise\load_skin.js'
14:56:20.128 [862961@qtp-6137085-3] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/skins/Enterprise/load_skin.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.035 [15103247@qtp-6137085-7] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Foundation.js
14:56:20.019 [3006512@qtp-6137085-6] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_Containers.js (start->finish): 47ms
14:56:20.128 [3006512@qtp-6137085-6] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_DataBinding.js'
Path Info: '/ISC_DataBinding.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_DataBinding.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_DataBinding.js'
14:56:20.128 [3006512@qtp-6137085-6] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_DataBinding.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.128 [15103247@qtp-6137085-7] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_Foundation.js (start->finish): 156ms
14:56:20.128 [3006512@qtp-6137085-6] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_DataBinding.js
14:56:20.128 [862961@qtp-6137085-3] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\skins\Enterprise\load_skin.js
14:56:20.097 [21959354@qtp-6137085-5] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_History.js
14:56:20.097 [2330238@qtp-6137085-8] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Core.js
14:56:20.066 [11674406@qtp-6137085-4] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.128 [862961@qtp-6137085-3] INFO  c.i.download.Download - Returning 304: Not modified on conditional get of: C:\cwsrc\trunk\projects\cwf\web\isomorphic\skins\Enterprise\load_skin.js
14:56:20.128 [862961@qtp-6137085-3] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.128 [2330238@qtp-6137085-8] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_Core.js (start->finish): 125ms
14:56:20.128 [3006512@qtp-6137085-6] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.128 [15103247@qtp-6137085-7] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/ISC_FileLoader.js'
Path Info: '/ISC_FileLoader.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\ISC_FileLoader.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\ISC_FileLoader.js'
14:56:20.128 [3006512@qtp-6137085-6] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_DataBinding.js
14:56:20.128 [15103247@qtp-6137085-7] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/ISC_FileLoader.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.128 [15103247@qtp-6137085-7] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\ISC_FileLoader.js
14:56:20.160 [15103247@qtp-6137085-7] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.160 [15103247@qtp-6137085-7] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_FileLoader.js
14:56:20.160 [15103247@qtp-6137085-7] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_FileLoader.js
14:56:20.128 [862961@qtp-6137085-3] DEBUG c.i.download.Download - done sending 304 for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\skins\Enterprise\load_skin.js
14:56:20.160 [862961@qtp-6137085-3] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/skins/Enterprise/load_skin.js (start->finish): 32ms
14:56:20.160 [862961@qtp-6137085-3] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/custom/MaskedTextItem.js'
Path Info: '/custom/MaskedTextItem.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\custom\MaskedTextItem.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\custom\MaskedTextItem.js'
14:56:20.160 [862961@qtp-6137085-3] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/custom/MaskedTextItem.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.160 [862961@qtp-6137085-3] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\custom\MaskedTextItem.js
14:56:20.128 [21959354@qtp-6137085-5] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_History.js (start->finish): 140ms
14:56:20.160 [21959354@qtp-6137085-5] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/custom/CwButtonItem.js'
Path Info: '/custom/CwButtonItem.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\custom\CwButtonItem.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\custom\CwButtonItem.js'
14:56:20.160 [21959354@qtp-6137085-5] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/custom/CwButtonItem.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.128 [11674406@qtp-6137085-4] INFO  c.i.download.Download - Using gzipped form of request file: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Forms.js
14:56:20.160 [21959354@qtp-6137085-5] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\custom\CwButtonItem.js
14:56:20.160 [862961@qtp-6137085-3] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.160 [15103247@qtp-6137085-7] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_FileLoader.js (start->finish): 32ms
14:56:20.144 [3006512@qtp-6137085-6] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_DataBinding.js
14:56:20.238 [3006512@qtp-6137085-6] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_DataBinding.js (start->finish): 110ms
14:56:20.238 [15103247@qtp-6137085-7] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/custom/CwDynamicTable.js'
Path Info: '/custom/CwDynamicTable.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\custom\CwDynamicTable.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\custom\CwDynamicTable.js'
14:56:20.206 [11674406@qtp-6137085-4] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/ISC_Forms.js
14:56:20.191 [21959354@qtp-6137085-5] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.238 [11674406@qtp-6137085-4] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/ISC_Forms.js (start->finish): 172ms
14:56:20.160 [862961@qtp-6137085-3] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/custom/MaskedTextItem.js
14:56:20.253 [862961@qtp-6137085-3] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/custom/MaskedTextItem.js (start->finish): 93ms
14:56:20.238 [21959354@qtp-6137085-5] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/custom/CwButtonItem.js
14:56:20.238 [15103247@qtp-6137085-7] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/custom/CwDynamicTable.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.238 [3006512@qtp-6137085-6] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/system/modules'
Request URI: '/cwf/isomorphic/system/modules/custom/CwImageItem.js'
Path Info: '/custom/CwImageItem.js'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\custom\CwImageItem.js'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\system\modules\custom\CwImageItem.js'
14:56:20.253 [21959354@qtp-6137085-5] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/custom/CwButtonItem.js (start->finish): 93ms
14:56:20.253 [3006512@qtp-6137085-6] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/system/modules/custom/CwImageItem.js', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:20.253 [15103247@qtp-6137085-7] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\custom\CwDynamicTable.js
14:56:20.253 [3006512@qtp-6137085-6] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\system\modules\custom\CwImageItem.js
14:56:20.253 [15103247@qtp-6137085-7] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.253 [3006512@qtp-6137085-6] DEBUG c.i.download.Download - Expiration for static file: 3600 seconds from download
14:56:20.253 [15103247@qtp-6137085-7] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/custom/CwDynamicTable.js
14:56:20.253 [3006512@qtp-6137085-6] INFO  c.i.download.Download - done streaming: C:/cwsrc/trunk/projects/cwf/web/isomorphic/system/modules/custom/CwImageItem.js
14:56:20.269 [15103247@qtp-6137085-7] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/custom/CwDynamicTable.js (start->finish): 31ms
14:56:20.269 [3006512@qtp-6137085-6] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/system/modules/custom/CwImageItem.js (start->finish): 31ms
14:56:21.238 [862961@qtp-6137085-3] DEBUG c.i.s.RequestContext - Paths for request:
Servlet path: '/isomorphic/skins'
Request URI: '/cwf/isomorphic/skins/Enterprise/skin_styles.css'
Path Info: '/Enterprise/skin_styles.css'
Path Translated: 'C:\cwsrc\trunk\projects\cwf\web\Enterprise\skin_styles.css'
Real FileSystem Path: 'C:\cwsrc\trunk\projects\cwf\web\cwf\isomorphic\skins\Enterprise\skin_styles.css'
14:56:21.238 [862961@qtp-6137085-3] INFO  c.i.s.RequestContext - CGET URL: '/cwf/isomorphic/skins/Enterprise/skin_styles.css', User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)': Moz (Gecko) with Accept-Encoding header
14:56:21.238 [862961@qtp-6137085-3] DEBUG c.i.download.Download - request for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\skins\Enterprise\skin_styles.css
14:56:21.238 [862961@qtp-6137085-3] INFO  c.i.download.Download - Returning 304: Not modified on conditional get of: C:\cwsrc\trunk\projects\cwf\web\isomorphic\skins\Enterprise\skin_styles.css
14:56:21.253 [862961@qtp-6137085-3] DEBUG c.i.download.Download - Expiration for static file: 86400 seconds from download
14:56:21.253 [862961@qtp-6137085-3] DEBUG c.i.download.Download - done sending 304 for file: C:\cwsrc\trunk\projects\cwf\web\isomorphic\skins\Enterprise\skin_styles.css
14:56:21.253 [862961@qtp-6137085-3] DEBUG c.i.timing.Timing - Request: /cwf/isomorphic/skins/Enterprise/skin_styles.css (start->finish): 15ms

          Comment

            #6
            The logs show the conditional get sometimes working and sometimes not. We've never seen this in any deployment, the only explanation that seems to fit is that you've got a filter servlet that is modifying the If-Modified-Since header before it reaches the Download servlet.

            Actually, one more possibility. What's the Java locale, is it something other than en_us?

            Comment

              #7
              We don't have a filter servlet between the Download and the request. And the java locale is en_us. Our web.xml directly sets the FileDownload servlet for handling all files under the \isomorphic\ path. In our own resource servlet, I originally had problems with some files cached and some not. It was due to me reading the resource modified date into milliseconds and comparing with the HttpResponse's If-Modified header, which rounds to the nearest second. Maybe you have the same type of problem with your servlet code? I don't have any other possible theory why it's not working.

              Comment

                #8
                Interesting theory and seems to be the only thing that would fit.

                What combination of application server, JVM, and operating system is this, and what kind of filesystem?

                Comment

                  #9
                  J2SE 6 in Windows XP, NTFS file system, application server is Jetty

                  Comment

                    #10
                    OK, that's a common environment for us, and for whatever reason we have not seen millisecond precision in lastModified stamps. Possibly there are more obscure settings involved as well, regardless, we'll put in a speculative fix and get you a build that contains it.

                    Comment

                      #11
                      Can you let me know when this is fixed and how I can get a hold of it? Thanks.

                      Comment

                        #12
                        Expected tomorrow afternoon, and we will send you a download link.

                        Comment

                          #13
                          problem with html pane overlapping content on tabswitch for google map API

                          I have a problem in my project ...when i switched tab from my map tab which is using html pane for include google map api . Please tell me if any solution for this .......

                          thanxx

                          Comment

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