Re: [OT] Servlet Filtering & performance..

[prt]

I dont want to handle the display process, just to map it from the filter to
"D:\storeg\data\uf..".
But thank you for your solution.


Christopher Schultz-2 wrote:
> 
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> prt,
> 
> prt wrote:
>> I have another problem,
> 
> You should post a separate message in this case.
> 
>> I save uploaded images(by users)  in folder place at
>> "D:\storeg\data\uf\".
>> So when the URL is "http://localhost/test/uf/xyz.jpg"; then is redirect to
>> "D:\storeg\data\uf\xyz.jpg" 
> 
> I assume you mean "it is mapped to d:\..."... redirecting to a local
> file path won't work unless you are running your browser from the
> application server.
> 
>> And that so because i configure in server.xml this part between the host
>> tag,
>> <Context path="/uf" docBase="D:\storeg\data\uf" debug="0"
>> crossContext="false"/>
>> 
>> Is there way that i can do that by using the filter, how can i redirect
>> the
>> request from the filter when is "/uf..." to
>> "D:\storeg\data\uf..." with out loading the image and print it out from
>> the
>> filter ?
> 
> You have two options:
> 
> 1. Map a directory into your URL space (not sure how to do that in
>    Tomcat, but I'm sure that's been covered in the archives).
> 
> 2. Write an image-serving servlet. Something like this:
> 
> <servlet-mapping>
>    <url-pattern>/ug/*</url-pattern>
>    <servlet-name>imageServlet</servlet-name>
> </servlet-mapping>
> 
> Your servlet class, written in loose pseudocode:
> 
> doGet()
> {
>  String filename = request.getExtraPathInfo();
> 
>  // You should check for ".." and other evil-looking paths
> 
>  filename = "D:/storeg/data/ug/" + filename;
> 
>  File f = new File(filename);
> 
>  response.setContentType("whatever/is+appropriate");
>  response.setContentLength(f.length());
> 
>  FileInputStream in = new FileInputStream(filename);
>  OutputStream out = response.getOutputStream();
> 
>  byte[] buffer = new byte[1024];
>  int count = 0;
>  while(1024 == (count = in.read(buffer)))
>     out.write(buffer);
>  out.write(buffer, 0 count);
>  in.close();
>  out.close();
> }
> 
> Hope that helps,
> 
> - -chris
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