i did a few more investigations and there is one thing i can't understand. this is how problematic requests look like:
Host: localhost:8080 User-Agent: Mozilla/5.0 (X11; U; Linux i686; pl; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 Accept: text/javascript, text/html, application/xml, text/xml, */* Accept-Language: pl,en-us;q=0.7,en;q=0.3 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-2,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive X-Requested-With: XMLHttpRequest X-Prototype-Version: 1.6.1_rc2 Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Referer: http://localhost:8080/my-webapp/identity Content-Length: 0 Cookie: blackbird={"pos": 1, "size": 0, "load": null}; JSESSIONID=1k1mtrom1uxhy and following is the answer: X-Tapestry-ErrorMessage: A component event handler method returned the value Block[reportBlock within Identity, at classpath:org/myapp/tapestry/pages/Identity.tml, line 172]. Return type org.apache.tapestry5.internal.structure.BlockImpl can not be handled. Configured return types are java.lang.Class, java.lang.String, java.net.URL, org.apache.tapestry5.Link, org.apache.tapestry5.StreamResponse, org.apache.tapestry5.runtime.Component. Content-Type: text/html; charset=utf-8 Content-Encoding: gzip Transfer-Encoding: chunked Server: Jetty(6.1.12rc1) the question is, how it is possible that T5.1.0.5 rejects Block as response to ajax request? 'X-Requested-With" header confirms that it was XHR for sure. cheers, m. Janko Muzykant wrote: > > hi guys, > > this is quite strange, but i noticed that actionlinks "sometimes" return > unexpected results. i have a page containing lot of actionlinks > changing/updating certain elements via ajax request/response. from java > side it's nothing more than just returning a block or MultiZoneUpdate as a > result of action. sounds simple. surprisingly it's enough to wait a few > minutes, click the same (working correctly so far) action link to get an > error saying that Tapestry was not expecting a Block in result but a > String rather. > > to be sure, I changed the way how I return a block, detecting first if i'm > really answering to ajax request: > > return request.isXHR() ? myBlock : null; > > and guess what. i started receiving whole the page (instead of blocks) in > ajax responses! that obviously resulted in blackbird message "reply is > null". > > again, problem is not simply reproducible but i noticed it's enough to > wait a few minutes to observe this strange behavior. it's also enough to > click the link again to get a correct response. for sure it has nothing to > do with my session expiration (set to 30 minutes) and I have no other > "timeouting" mechanisms. > > could you please give me a hint what may be wrong here? > > thanks, > m. > > -- View this message in context: http://www.nabble.com/actionliks-and-XHR-response-problem-tp25148353p25167521.html Sent from the Tapestry - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
