To clarify: It seems we can't do a client-side/"global" redirect without
getting an
"Attempted to process incomplete pipeline"/"Response already submitted"
exception,
because pipeline processing continues after the redirect occured.
We generally have the following pipeline setup:
-------------------------------------------------------------------------
=> Pipeline-entry (root sitemap )
map:match *.cont -> map:generate contcall-{1}
=> Pipeline-entry (subsitemap)
map:match contcall-* -> map:call continuation="{1}"
=> Flow Code (sendPageAndWait ...)
=> JX-Generate
=> Serialize xml ...
=> Pipeline-return
map:transform ...
map:serialize html ...
=> Pipeline-return
-------------------------------------------------------------------------
The use-case we try to achieve: Conditional CLIENT-SIDE/global redirect
depending on status in Flow.
We tried the following:
- Obvious: Redirect in Flowcode: cocoon.redirectTo ( uri, global=true) =>
Exception "Attempted to process incomplete pipeline"
- cocon.sendPage to a matcher which does a map:redirect (i.e. instead of
JX-Generate above) => Exception "Attempted to process incomplete
pipeline"
- Doing redirect "manually" by Setting HTTP status and Location header
directly (in sitemap or flow) => Does not work, headers set from
subsitemap are thrown away/overwritten
- Setting a request-attribute in flow code and deciding in root-sitemap
wether to serialize or to redirect via map:select => Does not work
map:select gets evaluated on pipeline creation, i.e. too early
- same as last one with custom Redirect-Action which redirect depending on
request-attribute => Does not work: action also gets executed too early on
pipeline creation
It almost seems you cannot achieve a "late" conditional redirect in
Cocoon, only when the condition is
known at the beginning of pipeline processing, which is just too early for
most use-cases ...
Any hints would be greatly appreciated,
Thx,
Andreas
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