We have a web application that allows user to download a zip file from a web server. We just provide dummy iframe source to the full URL of zip file on web server. This approach would allow end user to use browser controls which allows the user to open or save the zip to user's local machine.
We have a requirement that the zip file is automatically extracted and save to a specific location on user's machine. Any thoughts on how this can be achieved?
Thanks.
I highly doubt that you'll be able to do that. The closest you're likely to get is to generate a self-extracting executable file (which would be OS-dependent, of course).
I certainly wouldn't want a zip file to be automatically extracted - and I wouldn't want my browser to be able to force that decision upon me.
Short answer is I don't believe this is possible using the simple URL link you've implemented.
Fundamentally the problem you have is that you have no control over what the user does on their end, since you've ceded control to the browser.
If you do want to do this, then you'll need some client-side code that downloads the zipfile and unzips it.
I suspect Java is the way to go for this - Javascript and Flash both have problems writing files to the local drive. Of course if you want to be Windows only then a COM object could work.
Instead of sending a zip file why don't u instruct the web server to compress all the web traffic and just send the files directly?
See http://articles.sitepoint.com/article/web-output-mod_gzip-apache# for example.
Related
I want to access a file server that is not present in my network, but I have credentials of other domain that can be used to access the file.
How do I gain access to the file in share?
Is it possible to gain access to the file using a java program?
Operating System is Windows. I want to read the contents from .txt and .csv files present in the share and display it on a web page.
I used jcifs library to solve this. It works great.
You can use ftp protocol.
And also can make a map drive from share folder on your system. It's a simple solution.
I have developed a website, one of its operation is to read and write data to text files stored at my local machine such as D://test.txt or C://file.txt, but now I am going to host my website at the external server, i mean over the internet use, i wonder where to keep these files that are associated with read and writing operations. At present I am getting an exception file not found if i am using my local machine location. For your information, I am using GlassFish server.
You will want to create a system property on Glassfish, which represents the file path and name. Then upload the file to that location of your choosing on the server where your website application is deployed.
Depending upon your needs, you may find it easier to deploy the file out with your application. Make sure the file is on the classpath, and you can load it using any number of ways.
see, i am developing a web application that downloads files from a server via http requests, but in a case the file isn't in the server but in the applet itself, i mean, some binary content is dynamically generated inside the applet and it must be downloaded. Of course i can use the java libraries to save the file in the client file system (if the applet is a signed one), but i was wondering if it can be done connecting the java OutputStream to the browser's download window, in other words, start a download from an applet.
Am i a crazy person ?
by the way, is it possible to do something similar from javascript ?
No, it is not possible to get around security by attaching the output of an applet to the standard file download mechanisms of a browser.
OTOH, since the Next Generation Java Plug-In, it is no longer necessary to have a signed and trusted applet in order to save files(/bytes) to the local file-system. Chase the links in the Applet info. page for more details. For a demo. of using the JNLP API services (that the plug-in2 hooks into for this functionality) see the File service demo..
You can if e.g. you upload the file to the server and then force browser (via LiveConnect or otherwise) to open that file from the server.
As far as I'm aware, there's no cross-browser way to emulate downloading from within an applet. So you should create that download yourself, and let browser do what it does best.
Obviously, it might well make sense to move the actual creation of the stream to your server side.
I have been messing around with GWT uploads lately. I want to have the ability to upload an XML file from the client, and get the contents of that file (display the contents in a TextArea).
From what I have found on the net, it seems I would have to upload the file to the server, and then get the contents of the file. I do not particularly like the idea of allowing file uploads to the server (even if they are only XML). Is there anyway to pull the contents of a file that the client specifies without sending it to the server?
Thanks
Recent (decent?) browsers implement the "HTML5" File API that's quite easy to use in GWT using JSNI.
See also: https://developer.mozilla.org/en/Using_files_from_web_applications
Because of security restrictions you cannot access the file on the client side alone. It has to be sent to the server for processing.
One of my requirements is, on load of page, a file is to be created dynamically and downloaded at a particular location on the client's machine.
In case the file is already present, it has to be over written.
is there any way where we can access the client's system and store the file at the required folder?
I feel one cannot access the client machine when the code is being executed on the server..
Senorio:
1-User click on generate document then it took template stream data ,req. data file and then save two file into client machine.
2-After that template open and it fetch the data file from same directory.
Please help me on this. This is an SOS!!
There are probably other solutions, I use a signed applet for this purpose.
As always, there are a few caveats though:
You can't "force" anything against the will of the user. Applets may be disabled in the client's browser, or they may not even have Java installed. Or the target directory might not be writeable by the user.Your server should handle cases where the client doesn't have the correct version of the file gracefully.
You can't do this from the server side obviously but you also really can't do this from a client script either. Browser security will prevent a page script from modifying contents of the file system.
Your only options will be to run a third-party browser plugin software that has elevated permissions.
Examples of such are
Java Applets
Java WebStart
Microsoft Silverlight
ActiveX
Each one is different and most require some level of user interaction to confirm that they allow plugins to run with elevated security.