Caching of static files

Hello all,
I was wondering if any of you has a solution to the following problem.
If you use javascript and store these files as static files within Apex, the files will be downloaded on the client cache without an expire date.
Now if I have an application in production, and I change the javascript source, the application will not work correct anymore, since the cached version of the javascript file is not downloaded again.
You manually have to hit <ctrl>-F5 to force a new download.
That's hard to explain to end users.
Has any of you found a way to force a new download?
The only way I can think of is rename the files and change it also in the page source. Then no cached version exists.
And I believe if you place the files on the OS, the caching mechanism is working better, but that's not an option at the moment.
Thanks
Guido

You could put the source of static files into some database procedure and run that procedure on page 0
procedure print_js is
begin
     htp.p{'
               <script type="text/javascript">
               </script>
end;

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Need info regarding static file cache in weblogic

Hi,
I want to cache the static files at weblogic side
I am using Apache plugin provided by weblogic
I have gone through the e-docs about FileCache ON which is needs to be set in httpd.conf
I want to know is there any settings which is set at weblogic to cache static files
As i am using apache plug in provided by weblogic i want to know if there is any setting at weblogic side
Thanks in advance

Hello,
Normally the statis contents are served from web servers, in your case this may be from Apache. So what statis files are you referring to in weblogic, is that a part of HTML and images from WAR / EAR ?
In general weblogic has its own cache temp location as runtime to keep the classfiles and other resources unpacked from WAR / EAR.
-AJ

APEX 3.1 - Cache of Workspace Images or Static Files

Hi,
I attended the ODTUG Conference and they mentioned that in 3.1 Images and Static files (uploaded as shared components) are now cached. Where in the documentation does it state this? Can you configure the cache settings?
Thank you,
Martin

Hi Joel,
>> See....if you came to one of these conferences like OOW or ODTUG, I could …
Yeah, rubbed it in, why don’t you :)
>> It has nothing to do with the upload procedure …
That was my mistake. I meant the downloading/delivery procedure.
>> I'm not sure I understand what you mean by "free files"
By “free” files, I meant data files that were uploaded to the database, like scanned documents etc., and not the classic static files like JavaScript, CSS, or the firm logo image.
Now, with 3.1 native support of BLOB, and the rumors that your team is working on a revised version of the document library package, things might be simpler for issues like (simple) content management.
>> Please let me know if this does not make sense.
Tyler post came right on time, to fulfill your pseudocode explanation. After reading Tyler post, I better understand what you meant, and how I can achieve it. At first, I thought that all the HTTP header stuff id done for you, by some built-in or Oracle supplied package, but now I understand it’s the developer responsibly.
One more thing about Tyler post, which was published prior to version 3.1. He mentioned the need to add some specific entries to the DAD, in order to utilize this technique:
“If you’re using Oracle HTTP Server (Apache + mod_plsql), add the following lines to your Database Access Descriptor (DAD), then bounce OHS to apply your changes:
PlsqlCGIEnvironmentList HTTP_IF_NONE_MATCH
PlsqlCGIEnvironmentList IF_MODIFIED_SINCE “
Is this still the case with 3.1? I don’t remember reading about these specific entries in the installation documentation. My current DAD don’t includes these entries, and still it seems like the caching of static files is working (I tested against apex.oracle.com).
Thanks and regards,
Arie.

How to Clear Cache for an Old Static File in Shared Components

Hello,
I am using Apex 4.1.1.00.23, HTTP Server with mod_plsql, and Oracle Database 10.2.0.5.0.
My situation is as follow:
I have a CSS static file in the shared components that is used in different applications. I recently modified the CSS file, but the changes are not reflected in my applications.
I tried clearing the cache of my browsers, deleting the file from shared components and creating a new one with the same name, and nothing is working.
Using Firebug, I can see that the file used in my pages is the old version of it. Anyone can tell me if the server is caching the file and how can I clear it?
Thank you for your help,
Erick

What kind of document is it (e.g. is this a parsed
HTML file, or a static file)? have you adjusted your
cache settings with the nsfc.conf file? have you
enabled the nsfc report? Are the files stored on NFS
volumes?
Regardless, you can force the cache to be flushed by
enabling the nsfc report, and then accessing the URI
like so:
/nsfc?restart
See the Performance and Tuning Guide:
http://docs.sun.com/source/817-1836-10/perftune.html#w
p17232I tried to to do this. Did n't worked. /nsfc?restart is not working for me. I have IPlanet 6.1 Webserver version. Without having any backend server running, I am getting JSPs displayed from cache!! Please help me out.

APEX 3.1.2 Static File Upload Issues

We are still running on APEX 3.1.2 though we hope to go to 4 very soon.
We had a production problem this past week that is perplexing. I have seen other posts referencing similar issues but no solutions.
We have an application that has several Static File Javascripts (.js). We already ran into the IE Upload bug so we only upload in Mozilla now.
We had changes to one of the .js files (identity.js). I deleted the old file using the Shared Components screen and uploaded the new one. The action was "Successful" but the file was still the old version. We deleted a file of 73 lines of code and uploaded a new version of 28 lines. After successful upload, we still would get the 73 line version . The app was still getting that version too.
I deleted it many times and tried again. I ran scripts to do both the delete and upload. I even deleted the file manually from the FLOWS_FILES table that held it. Still got the old version.
We bounced the server (thinking it was cached somewhere) - still got the old version. Finally, in desperation, I started cloning the app to another app number in another Workspace. Since we use aliases, I thought I could use a clean Workspace and uplad the new file there. This worked but - suddenly the old Workspace started using the correct file.
Is ther some secret cache somewhere that needs to be cleared out? I did not want to start randomly clearing out caches and there is no documentation on this issue.
Is it something about our config - we have Oracle HTTP Server, OC4J, and modplsql for this environment with a 10g database.
Any insight would be appreciated - my manager does not like "it fixed itself magically".

We ruled out the browser caching by trying the app on several other people's PCs.
I am thinking it is being cached somewhere in the APEX server environment but cannot find any documentation on where or what that might be.
I think I might have triggered a refresh when I was trying to implement a cloned version (in a different Workspace). It seems that the scope of a JS file is within its Workspace so we figured that a new Workspace would treat the changed file as a new file - and it did. During this process, we had duplicate ALIAS for a minute and I think that confused the APEX App Engine and triggered the refresh.
But that is a SWAG opinion.
I also thought of "versioning" the JS files but our developers are not too keen. If we don't find another solution, that may be what we have to do.

Dynamic file request to appserver and static file request to webserver

Can we redirect dynamic file request to appserver and static file request to webserver in any application and
what are the best way to do it ?
Waiting for the best suggestions ?

when you have a large number of images/css/javascript/static(html/pdf/doc) files. It takes some of the processing load from your app server and also reduces the network traffic (otherwise traffic must flow between webserver and weblogic as well). it is also reasonably trivial to configure cache/modification/etags headers from a webserver and they are probably more featured than a weblogic server (e.g. to turn on gzip for static files dynamic is just a setting in the webserver but probably needs a custom filter developed in weblogic).
Again this applies if you already have a webserver (normally because your firewall policy dictates this approach). If you are considering whether to have a webserver at all then there are different considerations.
regards
deepak

Editing static files - changes not recognized by Application

I've uploaded a txt file into the static files area of my application, and I'm able to refer to the functions within it. They're working great. Now I'd like to be able to modify one of those functions.
Under Shared Components > Static Files, I click to open the existing static file. I make a change to the file and click Apply Changes. It's a very simple change: one of the functions returns hex code #FFFF00 (yellow), and I changed it to return #FF0000 (red).
I log in to the application, make a change to a field that should fire the color function. Yes indeed, that function DOES fire. Unfortunately, it produces the OLD result - I'm still seeing a yellow field.
However, if I delete the static file and upload it again, I get red as expected.
Am I doing something wrong, or missing a step to "activate" the changes that I make online?
Apex 4.1.1.00.21, on apex.oracle.com.

Excellent, Scott. Thank you for the corroboration. Your mention of the "run time user" led me to a partial workaround.
I think I've discovered that the problem is in the browser cache. Although it appears that the change to the static file is taking effect immediately as far as APEX is concerned, the browser is caching the information from the static file, and therefore any changes to that static file are being ignored. Simply closing the browser and coming back in is not enough. Nothing short of clearing the browser's cache of Temporary Internet Files seems to help.
I'm able to easily reproduce this with multilple tabs in a single browser session as well, without even involving a run-time user.
(1) open a browser (IE or Firefox) and connect to the APEX application. Note the current behavior of the affected object(s).
(2) open another browser tab pointing to Shared Components > Static Files
(3) apply a change to the static file;
(4) clear the browser cache as follows:
Internet Explorer: Delete Browsing History > Temporary Internet Files
Firefox: Clear Recent History > cache
(5) return to the first tab and refresh the browser page
Although I don't particularly like this "answer", it seems that the problem isn't with Apex, so I'll say that my question has been answered.
Helpful points for Scott.

Bug: can't access static files with space in the path

Please let me know if this a a wrong place to file bug reports.
I installed webserver7u4 and when I try to access a static file within my war which contains a space in the path, I get HTTP404.
$ ls webserver7/https-myapp/web-app/myapp/_default/images/ddtree/black\ spinner/1.png
webserver7/https-myapp/web-app/myapp/_default/images/ddtree/black spinner/1.png
$ wget -O /dev/null "http://localhost:8080/images/ddtree/black spinner/1.png
"--13:47:06-- http://localhost:8080/images/ddtree/black%20spinner/1.png
=> `/dev/null'
Resolving localhost... 127.0.0.1, ::1
Connecting to localhost|127.0.0.1|:8080... connected.
HTTP request sent, awaiting response... 404 Not found
13:47:06 ERROR 404: Not found.Now, if I create a symlink to a path that contains url encoded space, everything works:
$ ls -l webserver7/https-myapp/web-app/myapp/_default/images/ddtree/black%20spinner
lrwxrwxrwx 1 root root 13 Aug 1 2008 webserver7/https-myapp/web-app/myapp/_default/images/ddtree/black%20spinner -> black spinner
$ wget -O /dev/null "http://localhost:8080/images/ddtree/black spinner/1.png"
--13:49:37-- http://localhost:8080/images/ddtree/black%20spinner/1.png
=> `/dev/null'
Resolving localhost... 127.0.0.1, ::1
Connecting to localhost|127.0.0.1|:8080... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1,446 (1.4K) [image/png]
100%[======================================================================== =======================================>] 1,446 --.--K/s
13:49:37 (89.76 MB/s) - `/dev/null' saved [1446/1446]So to me it appears that webserver doesn't decode the path before searching the local file system, which to me looks like a bug.
Let me know if you need more info.
cheers,
Igor

HTTP/1.1 RFC [http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.2|http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.2]
3.2 Uniform Resource Identifiers
URIs have been known by many names: WWW addresses, Universal Document Identifiers,
Universal Resource Identifiers [3], and finally the combination of
Uniform Resource Locators (URL) [4] and Names (URN) ... where
3 is a link to [http://www.ietf.org/rfc/rfc1630.txt|http://www.ietf.org/rfc/rfc1630.txt] section BNF for specific URL schemes
httpaddress              h t t p :   / / hostport [ / path ] [ ?search ]
path                   void | segment [ / path ]
segment                xpalphas
xpalphas               xpalpha [ xpalphas ]
xpalpha                xalpha | +
xalpha                 alpha | digit | safe | extra | escape
alpha                  a | b | c | d | e | f | g | h | i | j | k |
                         l | m | n | o | p | q | r | s | t | u | v |
                         w | x | y | z | A | B | C | D | E | F | G |
                         H | I | J | K | L | M | N | O | P | Q | R |
                         S | T | U | V | W | X | Y | Z
digit                  0 |1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
safe                   $ | - | _ | @ | . | & | + | -
extra                  ! | * | " | ' | ( | ) | ,
escape                 % hex hex
hex                    digit | a | b | c | d | e | f | A | B | C | D | E | F{code}
4 is a link to RFC 1738 Uniform Resource Locators (URL)
[http://www.ietf.org/rfc/rfc1738.txt|http://www.ietf.org/rfc/rfc1738.txt] section 5. BNF for specific URL schemes
has :
{code}
httpurl        = "http://" hostport [ "/" hpath [ "?" search ]]
hpath          = hsegment *[ "/" hsegment ]
hsegment       = *[ uchar | ";" | ":" | "@" | "&" | "=" ]
uchar          = unreserved | escape
escape         = "%" hex hex
hex            = digit | "A" | "B" | "C" | "D" | "E" | "F" |
                             "a" | "b" | "c" | "d" | "e" | "f"
unreserved     = alpha | digit | safe | extra
alpha          = lowalpha | hialpha
lowalpha       = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" |
                 "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" |
                 "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" |
                 "y" | "z"
hialpha        = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" |
                 "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" |
                 "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z"
digit          = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" |"8" | "9"
safe           = "$" | "-" | "_" | "." | "+"
extra          = "!" | "*" | "'" | "(" | ")" | ","
{code}
I do not see space in these RFCs for httpurl.

Export to Excel and Save as Static File

Hello all,
When I export to excel from SharePoint 2013, and save the file, the data remains dynamic in that if I update the list in SharePoint it will update the data in Excel. This is great and I use it in a few places, but I also need to capture a point in time and
save the exported Excel file as static data (i.e. Export to Excel, and Save as the Q3 Report). How can I save the file as static/remove the dynamic link so I just have the data at the time of export?
Thanks!
K.
Personal Blog: http://thebitsthatbyte.com

Hi Kelly,
According to your description, my understanding is that you want to export to excel as a static file.
In SharePoint, when you export list to excel, it works as a one-way sync. It can sync data from SharePoint to Excel. If you don’t want to sync the data from SharePoint, you can copy the data from the exported excel file to a new excel, then save the new
excel file.
Best Regards,
Wendy
Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Wendy Li
TechNet Community Support

A error message from running the jpa-cache-server.cmd file

When I try to run jpa-cache-server.cmd file, it show the following error message:
"failed to load main-class manifest attribute from %coherence_home%\lib\coherence-jpa.jar"
What is the problem?

Forgive me but I do not see that file (jpa-cache-server.cmd) in the Coherence 3.5 distribution. With that said, I don't believe that coherence-jpa.jar is a executable jar. What exactly are you trying to do?
If you are trying to start a cache server with the jpa classes available to it I would suggest just adding the coherence-jpa.jar to the class path.
Rob
:Coherence Team:

Error When Uploading a CSS file or Static file

When I am uploading a CSS or Static file , I get the following error. But I can upload images files with no issues.
ORA-02291: integrity constraint (FLOWS_FILES.WWV_FLOW_FILE_OBJ_FK) violated - parent key not found
Oracle XE upgraded to Apex 3.1
Please help
George

Yes, if you upload an image on a normal Oracle Apex Database its stored in the DB.
But, if you remember, when you configire apex you specify an images directory /i/.
Under this directory you will find all the images that apex uses as well as css files, etc.
If you place your image in this directory you can reference it my modifying the appropriate stylesheet/template.
So, for example, you cna place your own stylesheets in the appropriate directory on the server.

LV2012 Web Services w/ NI Auth login not working w/ static files in Firefox 19

Hi!
I followed this procedure to password protect my web service and the static files.
http://digital.ni.com/public.nsf/allkb/DF41D5DA8EEB4840862577D90058C208
When testing it out with my web service it seems to work fine on any web browser. http://localhost:8080/add/add/1/2 first will present a login. Once the user is logged in the page refreshes and the results of the operation are shown. http://localhost:8080/logout works as well.
I followed the procedure in the FAQ to include an index.html file.
http://www.ni.com/white-paper/7747/en#toc15
When I try to access the page (via http:localhost:8080/add/web/index.html) I'm greeted with the National Instruments login screen. I enter my credentials and in Chrome and Internet Explorer the screen refreshes and I see my html file. In Firefox it hangs for awhile on the authentication screen and then reloads back to the authenticaiton screen (as if the username and password did not take).
Attached are my files. If you want to try and recreate this please follow this procedure:
* Unzip the attached project to a folder
* Open the project in LabVIEW 2012
* Check the properties of the web service to ensure that the build paths are correct
* Follow the procedure above for setting up NI Auth on your web service and adding the "testpermission2" permission. Be sure to remove "Everyone" from that "testpermission2" or you will never see a login prompt.
* Build/Deploy the web service
* open http://localhost:8080/logout to ensure that you are not currently authenticated
* open http://localhost:8080/add/add/1/2 and login, observe behavior
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* open http://localhost:8080/logout to log back out
* open http://localhost:8080/add/web/index.html and see if you are able to login.
I've tried disabelling my plugins in Firefox and still have this problem. I'm really scratching my head on how to overcome this other than throwing away NI Auth and use something else. My web service is going to run off of a static front end driven by javascript and html. So the access point will be the html file. I need to have some username and password scheme worked out. I also need to be able to see what user is currently logged in with my Web Service VIs (does anyone know if that is possible with NI Auth)?
The other BIG issue I have with NI Auth is that it requires Silverlight. So much for mobile support, eh? Anyone know of a good plug-and-play alternative so I don't have to reinvent the wheel? I guess I could impliment some kind of token system on my web service side.
In the meantime, getting NI Auth to properly work with Firefox would help.
Thanks for your input,
-Nic
Attachments:
Example Web Service.zip ‏15 KB

Disclaimer: I in no way mean to bash NI and I have used NI Auth myself in the past
If you are going to go to the trouble of abstracting NI Auth, I would recommend instead investing your time in your own authentication scheme (or implementing a standard scheme in LV).
NI Auth is great and works for low security applications where you just don't want people fooling around with your application who shouldn't be.
However, NI Auth is really not that secure. If I remember correctly, the username is transmitted in plain text and I don't think the encryption algorithm is that sophisticated. It is nice that it's already integrated into LV, but there really are very few features at this time.
If you want something to be really secure, you need to take measures beyond what NI Auth provides and before you go to the work of building abstraction on top of a basic and somewhat shaky protocol, I'd seriously consider implementing a more stable base.
<insert 2 cents complete>
Chris
Certified LabVIEW Architect
Certified TestStand Architect

How to set Mime Type for Static Files

Hi All,
I am working on Apex 3.2.1.00.10.
When I am trying to upload (create) a ".js" file into Static Files under Shared Components of an application; it is saving as "*text/plain*" for Mime Type. But I need Mime type to be set as "*application/x-javascript*".
Please help me to change the Mime type of .js file.
Or is there any way to upload the file directly as "*application/x-javascript*" as its Mime Type.
Thanks in advance.
Umesh

In IIS v4 which comes with the Windows NT4 option pack, you right click the web page you are working with, select properties, then go to the HTTP Headers tab. At the bottom there's a button labelled File Types in the MIME Map section.
After you've clicked that, you can add the two mime types you need;
Associated Extension MIME Type
.jar application/x-java-jar-file
.jnlp application/x-java-jnlp-file
I'm assuming that it is the same in W2k/IIS5.

Not able to access files from Workspace Images and Static files

Hi,
We have just migrated our APEX Application from one server to another.
All the functionality is working fine except the images or files which we are uploading
in
Shared Components -> Static Files
Shared Components -> Images
We are uloading Images in Shared Components -> Images but those are not getting displayed there.
Similarly the files which we are uploaded in Shared Components -> Static Files are not accessible. If we
try to download using download icon its showing blank screen.
I am using some javascript files which i have uploaded into static files, but not able to refer them in page.
Please someone guide us how to resolve the above problem.
Thanks in advance.
Thanks & Regards
Sanjay
Edited by: user11204334 on May 25, 2010 1:35 AM
Edited by: user11204334 on May 25, 2010 3:45 AM

Hello Sanjay,
If you upload any static files such as IMAGES, FILES, or CSS you have to use the tags: #WORKSPACE_IMAGES# or #IMAGE_PREFIX# depending on your files location..
then try something like htp.p ('<img src="#IMAGE_PREFIX#fileName.gif" />');
And it should show the fileName.gif on your browser...
I am not sure if i remember correctly, you can reference files to a specific application or to the whole application, if I am not mistaken..Correct me..
Regards,
Noel Alex Makumuli,
Tanzania

Best Practice for serving static files (gif, css, js) from front web server

I am working on optimization of portal performance by moving static files (gif, css, js) to my front web server (apache) for WLP 10 portal application. I end up with moving whole "framework" folder of the portal WebContent to file system served by apache web server (the one which hosts WLS plugin pointing to my WLP cluster). I use <LocationMatch> directives for that:
Alias /portalapp/framework "/somewhere/servedbyapache/docs/framework"
<Directory "/somewhere/servedbyapache/docs/framework">
<FilesMatch "\.(jsp|jspx|layout|shell|theme|xml)$">
Order allow,deny
Deny from all
</FilesMatch>
</Directory>
<LocationMatch "/partalapp(?!/framework)">
     SetHandler weblogic-handler
     WLCookieName MYPORTAL
</LocationMatch>
So, now browser gets all static files from apache insted of the app server. However, there are several files from bighorn L&F, which are located in the WLP shared lib: skins/bighorn/ window.css, wsrp.css, menu.css, general.css, colors.css; skins/bighorn/borderless/window.css; skeletons/bighorn/js/ util.js, buttons.js; skeleton/bighorn/css/layout.css
I have to merge these files into the project and physically move them into apache served file system to make mentioned above apache configuration works.
However, this approach makes me exposed bunch of framework resources, which I do not to intend to change and they should not be change (only custom.css is the place to make custom changes to the bighorn skin). Which is obviously not very elegant solution. The other approach would be intend to create more elaborate expression for LocationMatch (I am not sure it's entirely possible giving location of these shared resources). More radical move - stop using bighorn and create totally custom L&F (skin, skeleton) - which is quire a lot of work (plus - bighorn is working just fine for us).
I am wondering what is the "Best Practice Approach" approach recommended by Oracle/BEA - giving the fact that I want to serve all static files from my front end apache server instead fo WLS app server.
Thanks,
Oleg.

Oleg,
you might want to have a look at the official WLP performance support pattern (Metalink DocID 761001.1 ) , which contains a section about "Configuring a Fronting Web Server Serving WebLogic Portal 8.1 Static Artifacts ".
It was written for WLP 8.1, but most of the settings / recommendations should also to WLP 10.
--Stefan

Caching of static files

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