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From Li <ampyx...@gmail.com>
Subject Re: Writing files accessible from a browser
Date Mon, 07 Aug 2006 07:20:45 GMT
Hi,

It is not advisable to make your webapp dir writable, can you tell me
what exactly would you like to achieve so that I may get more info to
help out ...



On 8/7/06, Romain Quilici <r.quilici@chem.usyd.edu.au> wrote:
> Hi,
> thanks for the advice,
> But I want to avoid harcoded links such as $APACHE_HOME\httpdocs\images
> or <a href="http://yourdomain/images/1.jpg"> in my jsp.
>
> Indeed I don't want to modify these values if I decide Tomcat to run on
> another port, or to install Tomcat in another directory or even OS. That
> is why I am looking for an approach using
> the webapp context, so I don't have to worry about the OS, or the port,
> or whatever configuration.
> Anyway thanks for your help
> Regards
> Romain
>
> Li wrote:
> > Hi,
> >
> > Here are few steps of achieving it (just tested, and it works):
> > 1. use FileOutputStream or any output streaming object to write a
> > image file
> >    into the directory
> >   in Windows, the path string should look like:
> > "c:\apache_home\httpdocs\images\1.jpg"
> >   in unix/linux, the path should look like
> > $APACHE_HOME\httpdocs\images\1.jpg"
> >   (assume, you had defined APACHE_HOME, make sure the images folder
> > is read/write
> >   only for the user/group that runs tomcat
> > 2. Make sure apache is on ...
> > 3. in your jsp: use
> >   e.g. <a href="http://yourdomain/images/1.jpg">click to view</a>
> >
> >
> > Wish it helps
> >
> > On 8/7/06, Romain Quilici <r.quilici@chem.usyd.edu.au> wrote:
> >> Thanks for the answer,
> >> this solution was part of my investigation, and was actually the first
> >> idea I had.
> >> The problem with this approach is I don't know how to access the
> >> /image_dir/ from within my web application.
> >> Maybe using something like
> >> String path = servletContext.getRealPath("/");
> >> String imagePath = path+"../image_dir/"
> >> and use the imagePath to create my images, then in my jsp something like
> >> <request.getContextPath()/../image_dir/image1.jpg>
> >>
> >> But I am not sure this approach works in all configurations,
> >> particularly if my webapp is deployed inside a war.
> >>
> >> Thanks
> >> Romain
> >>
> >> Li wrote:
> >> > if you have apache server, you can write file to its home dir, and
> >> > then use
> >> > http://<youdomain>/<image_dir>/image_name.suffix to view.
> >> >
> >> > On 8/7/06, Romain Quilici <r.quilici@chem.usyd.edu.au> wrote:
> >> >> Hi all,
> >> >> I have been reading several messages about writing files inside a web
> >> >> application, but I found no answer regarding my problem.
> >> >>
> >> >> I need to write files on the file system that can be accessible
> >> with a
> >> >> browser(I write images).
> >> >>
> >> >> - The most reliable solution I found was to use the webapp's tmp
> >> >> directory, unfortunately this directory is not accessible with a URL.
> >> >>
> >> >> - Another solution would be to write these images under my webapp
> >> >> root(or in another place under my webapp). But it seems that this
> >> >> approach does not work with webapps deployed in a war file.
> >> >> Indeed you cannot write inside wars like this.
> >> >>
> >> >> I don't want to rely on some hardcoded solutions. There is still the
> >> >> possibility to pass the absolute path to the directory (let's say
> >> >> TOMCAT_HOME/webapps/myimages/) and later, use inside my JSP
> >> >> <request.getContextPath()/../myimages/image1.jpg>, but I think
this
> >> >> solution won't work in many configurations
> >> >>
> >> >> Thanks a lot for your help
> >> >> Regards
> >> >> Romain
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> ---------------------------------------------------------------------
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> >> >>
> >> >>
> >> >
> >> >
> >>
> >>
> >>
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> >>
> >>
> >
> >
>
>
>
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>


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