PHP's output buffer and ASP.NET's Response.OutputStream

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kellygreer1 - 12 Dec 2007 18:30 GMT

PHP will alllow you to build up an entire page and before sending that
out as the response.... you can grab all the text and do search and
replaces, add comments, make more CSS/XHTML compliant, etc...

I have bee trying to do the same thing in ASP.NET by manipulating the
Response.OutputStream.
I keep getting the error:
Exception Details: System.ArgumentException: Stream was not readable.
On this line:
StreamReader sr = new StreamReader(Response.OutputStream, true);

What is the correct way to read from this stream? and then push back
in your own contents and then let the Response complete?

Thanks,
Kelly Greer
kellygreer1@nospam.com
replace nospam with yahoo

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John Timney (MVP) - 12 Dec 2007 19:02 GMT

You can do that by overriding the render event, completly replacing the HTML
should you choose to do so.....or in an ihttpmodule you can add a
response.filter method

http://microsoft.apress.com/asptodayarchive/73666/enforcing-xhtml-compliance-in-
aspnet-applications

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog

> PHP will alllow you to build up an entire page and before sending that
> out as the response.... you can grab all the text and do search and
[quoted text clipped - 14 lines]
> kellygreer1@nospam.com
> replace nospam with yahoo

Reply to this Message

kellygreer1 - 12 Dec 2007 22:28 GMT

On Dec 12, 2:02 pm, "John Timney \(MVP\)"
<xyz_j...@timney.eclipse.co.uk> wrote:

> You can do that by overriding the render event, completly replacing the HTML
> should you choose to do so.....or in an ihttpmodule you can add a
[quoted text clipped - 24 lines]
> > kellygre...@nospam.com
> > replace nospam with yahoo

Thanks for the info. So when you Override the Render method is this
the only place where you can manipulate the Response.OutputStream? or
do you get the existing "Rendered Text" as a String from somewhere
else?

Thanks,
Kelly

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John Timney (MVP) - 12 Dec 2007 22:41 GMT

Each control has a render method, as does page. Heres an example you can
add to a page to see the results.

protected override void Render(HtmlTextWriter writer) {
// extract all html and override <h2>News List</h2>
System.IO.StringWriter str = new System.IO.StringWriter();
HtmlTextWriter wrt = new HtmlTextWriter(str);
// render html
base.Render(wrt); //CAPTURE THE CURRENT PAGE HTML SOURCE AS STRING
wrt.Close();
string html = str.ToString();
html = html.Replace("text", "<h2>TEXT</h2>");
// write the new html to the page
writer.Write(html);
}

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog

> On Dec 12, 2:02 pm, "John Timney \(MVP\)"
> <xyz_j...@timney.eclipse.co.uk> wrote:
[quoted text clipped - 35 lines]
> Thanks,
> Kelly

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PHP's output buffer and ASP.NET's Response.OutputStream

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