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Posted to users@tapestry.apache.org by Dan Cyr <da...@thirdhalf.com> on 2012/10/10 23:52:52 UTC
Tapestry Problem on Google App Engine in Development
Using Tapestry 5.3.5 on Google Apps Engine. In development, when I set
eclipse to use the newest GAE Java 1.7.2.1, I see a screen-full of mostly
Black Diamonds with Question marks inside.
It seems normal again when I set in AppModule -->
configuration.add(SymbolConstants.GZIP_COMPRESSION_ENABLED, "false");
Also seems normal when I point back to my previous GAE Java 1.7.1.
That's the only thing I changing...
Deployment to production seems to be okay, without having to change any of
the gzip settings.
Anyone else experiencing this problem? GAE 1.7.2 Release notes mention
something about headers.
Thanks,
-Dan
Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
I'm not 100% sure that tapestry has set the header since
response.containsHeader() returns false. It's probably best to debug to be
sure.
My gut feeling is that gae is having troubles with setting a header after
writing to the response body. Although tapestry is doing this legally, under
normal circumstances this is not allowed. Normally response headers must be
written before the body. Perhaps the new version of gae is making this
assumption in its implementation
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Re: Tapestry Problem on Google App Engine in Development
Posted by Thiago H de Paula Figueiredo <th...@gmail.com>.
On Tue, 23 Oct 2012 12:37:38 -0200, Dan Cyr <da...@thirdhalf.com>
wrote:
> In summary:
>
> I am using Tapestry 5.3.5.
>
> In development, GAE 1.7.2 no longer provided the gzip header (1.7.1 used
> to) (see previous logs and debugs)
> Would tapestry be dependent on the servlet implementation? Is this a GAE
> issue?
It surely looks like a GAE issue, as it seems to be removing an HTTP
header set by the webapp.
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
In summary:
I am using Tapestry 5.3.5.
In development, GAE 1.7.2 no longer provided the gzip header (1.7.1 used to)
(see previous logs and debugs)
Tapestry sends gzip anyways. Black diamonds <?> in browser.
Please improve any of my assumptions... Can anyone chime in and explain
what may be happening?
Would tapestry be dependent on the servlet implementation? Is this a GAE
issue?
Thanks,
On Fri, Oct 19, 2012 at 5:47 PM, Howard Lewis Ship <hl...@gmail.com> wrote:
> There's a recently fixed bug where, once content is compressed, the
> compressed content is cached for later requests regardless of whether
> the client requests compression or not. Fixed in 5.3.5.
>
> https://issues.apache.org/jira/browse/TAP5-1868
>
> On Fri, Oct 19, 2012 at 2:42 PM, Lance Java <la...@googlemail.com>
> wrote:
> > So, it looks like something about GAE 1.7.2 is causing tapestry to send
> > gzipped content but not set the content encoding header. I'm baffled and
> out
> > of ideas... anyone else got any ideas?
> >
> >
> >
> > --
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>
>
> --
> Howard M. Lewis Ship
>
> Creator of Apache Tapestry
>
> The source for Tapestry training, mentoring and support. Contact me to
> learn how I can get you up and productive in Tapestry fast!
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Howard Lewis Ship <hl...@gmail.com>.
There's a recently fixed bug where, once content is compressed, the
compressed content is cached for later requests regardless of whether
the client requests compression or not. Fixed in 5.3.5.
https://issues.apache.org/jira/browse/TAP5-1868
On Fri, Oct 19, 2012 at 2:42 PM, Lance Java <la...@googlemail.com> wrote:
> So, it looks like something about GAE 1.7.2 is causing tapestry to send
> gzipped content but not set the content encoding header. I'm baffled and out
> of ideas... anyone else got any ideas?
>
>
>
> --
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Creator of Apache Tapestry
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
So, it looks like something about GAE 1.7.2 is causing tapestry to send
gzipped content but not set the content encoding header. I'm baffled and out
of ideas... anyone else got any ideas?
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
Interesting:
@Override
public boolean service(HttpServletRequest request,
HttpServletResponse response,
HttpServletRequestHandler handler) throws IOException {
boolean rc = handler.service(request, response);
logger.error("Contains header: " +
response.containsHeader("Content-Encoding"));
return rc;
}
configuration.add(SymbolConstants.GZIP_COMPRESSION_ENABLED, "false");
1.7.1
17:37:56,310 ERROR [com.MyFilter:28] - Contains header: false
1.7.2
17:47:20,215 ERROR [com.MyFilter:28] - Contains header: false
------------------------------
(not explicityly setting GZIP compression to false)
1.7.1
17:42:38,786 ERROR [com.MyFilter:28] - Contains header: true
1.7.2
17:41:20,049 ERROR [com.MyFilter:28] - Contains header: false
On Fri, Oct 19, 2012 at 5:56 AM, Lance Java <la...@googlemail.com>wrote:
> Is MyFilter printing out before or after handler.service(request,
> response)?
> You'll need to print it out after.
>
> Taking a look at the tapestry source code, the GZipFilter wraps the
> response
> in an implementation that will only apply GZipping when a certain threshold
> is reached (determined by the "tapestry.min-gzip-size" symbol). So the
> setting of the "Content-Encoding" header will happen after some bytes have
> been written to the response. I wonder if the GAE container implementation
> is having troubles with this pattern?
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
Is MyFilter printing out before or after handler.service(request, response)?
You'll need to print it out after.
Taking a look at the tapestry source code, the GZipFilter wraps the response
in an implementation that will only apply GZipping when a certain threshold
is reached (determined by the "tapestry.min-gzip-size" symbol). So the
setting of the "Content-Encoding" header will happen after some bytes have
been written to the response. I wonder if the GAE container implementation
is having troubles with this pattern?
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
Does this look like the proper way?
>From AppModule,
public void contributeHttpServletRequestHandler(
OrderedConfiguration<HttpServletRequestFilter> configuration) {
configuration.add("MyFilter", new MyFilter(), "after:GZIP");
}
On Wed, Oct 17, 2012 at 9:30 AM, Lance Java <la...@googlemail.com>wrote:
> Hang on a sec... are you saying the containsHeader("Content-Encoding") is
> false even when it works on GAE 1.7.1? I don't think that you've configured
> your filter correctly considering your previous results below:
>
> 1.7.1
> Response Headersview source
> Content-Encoding gzip
> Content-Type text/html; charset=utf-8
> Server Jetty(6.1.x)
> Transfer-Encoding chunked
>
> Request Headersview source
> Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
> Accept-Encoding gzip, deflate
> Accept-Language en-US,en;q=0.5
> Cache-Control max-age=0
> Connection keep-alive
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
Hang on a sec... are you saying the containsHeader("Content-Encoding") is
false even when it works on GAE 1.7.1? I don't think that you've configured
your filter correctly considering your previous results below:
1.7.1
Response Headersview source
Content-Encoding gzip
Content-Type text/html; charset=utf-8
Server Jetty(6.1.x)
Transfer-Encoding chunked
Request Headersview source
Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Cache-Control max-age=0
Connection keep-alive
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
So, this seems to be an issue in tapestry after all.
Can any tapestry gurus explain why tapestry would return gzipped content
without setting the Content-Encoding header?
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
Oops, pardon me, I see now, can't get the value, only true/false.
AppModule:
@Override
public boolean service(HttpServletRequest request, HttpServletResponse
response,
HttpServletRequestHandler handler) throws IOException {
logger.error("Contains header: " +
response.containsHeader("Content-Encoding"));
return handler.service(request, response);
}
1.7.2.1
configuration.add(SymbolConstants.GZIP_COMPRESSION_ENABLED,
"false");
12:41:53,851 ERROR [com.MyFilter:27] - Contains header: false
Without turning off gzip compression by setting it to false:
12:44:02,940 ERROR [com.MyFilter:27] - Contains header: false
12:45:42,095 ERROR [com.MyFilter:27] - Contains header: false
1.7.1
12:49:04,271 ERROR [com.MyFilter:27] - Contains header: false
----------------
False for everything.
On Wed, Oct 17, 2012 at 3:37 AM, Lance Java <la...@googlemail.com>wrote:
> > .containsHeader(.. yes, pre 3.0
> So print the boolean instead of the value. I just wanna see if tapestry has
> populated it.
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
> .containsHeader(.. yes, pre 3.0
So print the boolean instead of the value. I just wanna see if tapestry has
populated it.
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
.containsHeader(.. yes, pre 3.0
.getHeader( 3.0
GAE must be using pre-3.0. Servlet spec...
http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#getHeader%28java.lang.String%29
Sigh...
getHeader
java.lang.String *getHeader*(java.lang.String name)
Gets the value of the response header with the given name.
If a response header with the given name exists and contains multiple
values, the value that was added first will be returned.
This method considers only response headers set or added via
setHeader(java.lang.String,
java.lang.String)<http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#setHeader%28java.lang.String,%20java.lang.String%29>,
addHeader(java.lang.String,
java.lang.String)<http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#addHeader%28java.lang.String,%20java.lang.String%29>,
setDateHeader(java.lang.String,
long)<http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#setDateHeader%28java.lang.String,%20long%29>,
addDateHeader(java.lang.String,
long)<http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#addDateHeader%28java.lang.String,%20long%29>,
setIntHeader(java.lang.String,
int)<http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#setIntHeader%28java.lang.String,%20int%29>,
or addIntHeader(java.lang.String,
int)<http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#addIntHeader%28java.lang.String,%20int%29>,
respectively.
*Parameters:*name - the name of the response header whose value to return *
Returns:*the value of the response header with the given name, or null if
no header with the given name has been set on this response*Since:*Servlet
3.0
On Tue, Oct 16, 2012 at 11:11 AM, Lance Java <la...@googlemail.com>wrote:
> It's in the 2.3 javadocs?
>
> http://docs.oracle.com/cd/E17802_01/products/products/servlet/2.3/javadoc/javax/servlet/http/HttpServletResponse.html#containsHeader(java.lang.String)
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
It's in the 2.3 javadocs?
http://docs.oracle.com/cd/E17802_01/products/products/servlet/2.3/javadoc/javax/servlet/http/HttpServletResponse.html#containsHeader(java.lang.String)
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
That also is Servlet spec 3.0...
On Fri, Oct 12, 2012 at 11:37 AM, Lance Java <la...@googlemail.com>wrote:
> response.containsHeader("Content-Encoding") ;)
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
response.containsHeader("Content-Encoding") ;)
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
That also is Servlet spec 3.0...
On Fri, Oct 12, 2012 at 11:27 AM, Lance Java <la...@googlemail.com>wrote:
> response.getHeader("Content-Encoding")
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
response.getHeader("Content-Encoding")
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
Hmm..Where is my mind, of course..
But it seems response.getHeaderNames() is in Servlet Spec 3.0. Seems
like GAE gwt-2.4.0/gwt-user.jar is 1.5 and doesn't have that call
available? Another way to check?
Anyway, I'm convinced it's a GAE 1.7.1 -> 1.7.2 upgrade problem....Perhaps
GAE is not worth the trouble...
On Fri, Oct 12, 2012 at 3:25 AM, Lance Java <la...@googlemail.com>wrote:
> > logger.error(name + " " + request.getHeader(name));
> I meant you to log the response headers, not the request headers. This way
> we can check if it's tapestry's fault for not including the header or
> GAE's.
>
>
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
> logger.error(name + " " + request.getHeader(name));
I meant you to log the response headers, not the request headers. This way
we can check if it's tapestry's fault for not including the header or GAE's.
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
When I turn off gzip compression with
configuration.add(SymbolConstants.GZIP_COMPRESSION_ENABLED, "false");
my page generates a java.lang.IllegalStateException
Sanity check - neither a stream response nor a redirect response was
generated for this action request.
Can we at least get tapestry-developers to give us a sideways glance?
Thanks!
AppModule:
public void contributeHttpServletRequestHandler(
OrderedConfiguration<HttpServletRequestFilter> configuration) {
configuration.add("MyFilter", new MyFilter(), "after:GZIP");
}
public class MyFilter implements HttpServletRequestFilter {
private final Log logger = LogFactory.getLog(MyFilter.class);
public MyFilter() {
}
@Override
public boolean service(HttpServletRequest request, HttpServletResponse
response,
HttpServletRequestHandler handler) throws IOException {
@SuppressWarnings("unchecked")
Enumeration<String> e = (Enumeration<String>)
request.getHeaderNames();
while (e.hasMoreElements()) {
String name = e.nextElement();
logger.error(name + " " + request.getHeader(name));
}
return handler.service(request, response);
}
}
MyFilter:33] - Host localhost:8888
MyFilter:33] - User-Agent Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:16.0)
Gecko/20100101 Firefox/16.0
MyFilter:33] - Accept
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
MyFilter:33] - Accept-Language en-US,en;q=0.5
MyFilter:33] - Accept-Encoding gzip, deflate
MyFilter:33] - Connection keep-alive
MyFilter:33] - Cookie JSESSIONID=ey6yjar4lm3
MyFilter:33] - Cache-Control max-age=0
On Thu, Oct 11, 2012 at 10:52 AM, Lance Java <la...@googlemail.com>wrote:
> I'm assuming that this is a problem in GAE but if you want to check, you
> could contribute a HttpServletRequestHandler to print out the response
> headers as set by tapestry. Contribute a filter with ordering "after:GZIP".
>
> NB. You can disable compression by setting
> SymbolConstants.GZIP_COMPRESSION_ENABLED to false.
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
I'm assuming that this is a problem in GAE but if you want to check, you
could contribute a HttpServletRequestHandler to print out the response
headers as set by tapestry. Contribute a filter with ordering "after:GZIP".
NB. You can disable compression by setting
SymbolConstants.GZIP_COMPRESSION_ENABLED to false.
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Re: Tapestry Problem on Google App Engine in Development
Posted by Dan Cyr <da...@thirdhalf.com>.
There seems to be a "Content-Encoding gzip" missing on the response
in 1.7.2. Would that be the cause? Should GAE provide that header? Are
they listening or can we inform them?
1.7.1
Response Headersview source
Content-Encoding gzip
Content-Type text/html; charset=utf-8
Server Jetty(6.1.x)
Transfer-Encoding chunked
Request Headersview source
Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Cache-Control max-age=0
Connection keep-alive
----
1.7.2
Response Headersview source
Cache-Control no-cache
Content-Length 3222
Content-Type text/html; charset=utf-8
Date Thu, 11 Oct 2012 14:21:51 GMT
Expires Thu, 11 Oct 2012 14:21:51 GMT
Server Development/1.0
Set-Cookie JSESSIONID=ey6yjar4lm3;Path=/
Request Headersview source
Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Cache-Control max-age=0
Connection keep-alive
Cookie JSESSIONID=951c00i8ya0v
Host localhost:8888
User-Agent Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:16.0)
Gecko/20100101 Firefox/16.0
On Thu, Oct 11, 2012 at 3:40 AM, Lance Java <la...@googlemail.com>wrote:
> Using firebug (or similar) can you look at the request/response traffic
> when
> the error occurs?
>
> In particular, what are the values of the "Accept-Encoding" header on the
> request and the "Content-Encoding" header on the response?
>
>
>
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Re: Tapestry Problem on Google App Engine in Development
Posted by Lance Java <la...@googlemail.com>.
Using firebug (or similar) can you look at the request/response traffic when
the error occurs?
In particular, what are the values of the "Accept-Encoding" header on the
request and the "Content-Encoding" header on the response?
--
View this message in context: http://tapestry.1045711.n5.nabble.com/Tapestry-Problem-on-Google-App-Engine-in-Development-tp5716763p5716768.html
Sent from the Tapestry - User mailing list archive at Nabble.com.
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