From StringWriter to InputStream

[angelochen960]

Hi,

how to get an InputStream from a StringWriter, I know this works:

is = new StringInputStream(myStringWriter)

but this introduce an dependency to
org.apache.tools.ant.filters.StringInputStream;

Thanks,

Angelo

 

[Joshua Cranmer]

how to get an InputStream from a StringWriter, I know this works:

What exactly are you trying to do that involves turning a Writer into an
InputStream, specifically a StringWriter?

 

[Angelo Chen]

Hi Pete,

Thanks for the quick reply, here is what I'm doing:

in a servlet app, I use a StringWriter to capture some information,
then to stream it back to the browser, I need to have a
StreamResponse:

http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html

and this one requires a InputStream for the data source, in my case,
the data is in the StringWriter

 

[Arne Vajhøj]

in a servlet app, I use a StringWriter to capture some information,
then to stream it back to the browser, I need to have a
StreamResponse:

http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html

and this one requires a InputStream for the data source, in my case,
the data is in the StringWriter

What about:

StreamResponse sr = new TextStreamResponse("text/plain",
yourstringwriter.toString());

?

Arne

 

[Mike Schilling]

Hi,

how to get an InputStream from a StringWriter, I know this works:

is = new StringInputStream(myStringWriter)

but this introduce an dependency to
org.apache.tools.ant.filters.StringInputStream;

You'd like to do something like

InputStream is = new ReaderInputStream(new
StringReader(myStringWriter.toString(), encoding)

Unfortunately, Java fails to provide the ReaderInputStream (which
would be the obverse of InputStreamReader), so the best you can do is

byte[] barray = myStringWriter.toString().getBytes(encoding);
InputStream is = new ByteArrayInputStream(barray);

 

[Angelo Chen]

[...]
Unfortunately, Java fails to provide the ReaderInputStream (which
would be the obverse of InputStreamReader), so the best you can do is

    byte[] barray = myStringWriter.toString().getBytes(encoding);
    InputStream is = new ByteArrayInputStream(barray);

That's basically what I suggested.  But I think Arne's suggestion is  
better (just goes to show how useful it can be to look at the docs related  
to what you're actually doing, instead of just trying for a standard Java  
library solution ).

Pete

Hi all,

Thanks for answering my question, with your help, i found this works:

new ByteArrayInputStream(sw.toString().getBytes());

but Arne's is more 'context correct':

class StrStreamResponse extends TextStreamResponse{

Thanks,

Angelo

 

[Tom Anderson]

You'd like to do something like

InputStream is = new ReaderInputStream(new
StringReader(myStringWriter.toString(), encoding)

Unfortunately, Java fails to provide the ReaderInputStream (which
would be the obverse of InputStreamReader),

I'm not sure i'd call that an obverse, but never mind.

so the best you can do is

byte[] barray = myStringWriter.toString().getBytes(encoding);
InputStream is = new ByteArrayInputStream(barray);

Or you could do it with an OutputStreamWriter and a coroutine.

tom