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| Guest |
 Posted: Sun Aug 19, 2007 4:50 am |
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Guest
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Hi,
Following up on the 'metafunctions' thread, I added a feature in
ErlyWeb letting controllers implement a 'catch_all/3' function that is
called when clients request a controller function that doesn't exist.
Here's an example of how to use it:
foo_controller:
-module(foo_controller).
-compile(export_all).
catch_all(A, FuncName, Params) ->
{data, {A, FuncName, Params}}.
in foo_view.et:
<%@ catch_all(Data) %>
<% io_lib:fwrite("~p", [Data]) %>
Then, request
http://localhost:8080/foo/bar/1/2/3
This will cause catch_all to be called with FuncName "foo" and Params
["1", "2", "3"].
Note: 'catch_all' is now a reserved function name. E.g. when a user
requests http://localhost:8080/foo/catch_all/1/2/3, ErlyWeb won't let
the user access it directly. Instead, ErlyWeb will tread this function
as non-existing, and call catch_all(A, "catch_all", ["1", "2", "3"]).
Let me know if you find any problems.
Thanks,
Yariv
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| Guest |
| Posted: Sun Aug 19, 2007 4:51 am |
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Guest
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Btw, erlyweb_util:indexify is now deprecated in favor of catch_all.
On 8/18/07, Yariv Sadan <yarivsadan@gmail.com> wrote:
> Hi,
>
> Following up on the 'metafunctions' thread, I added a feature in
> ErlyWeb letting controllers implement a 'catch_all/3' function that is
> called when clients request a controller function that doesn't exist.
>
> Here's an example of how to use it:
>
> foo_controller:
>
> -module(foo_controller).
> -compile(export_all).
>
> catch_all(A, FuncName, Params) ->
> {data, {A, FuncName, Params}}.
>
> in foo_view.et:
>
> <%@ catch_all(Data) %>
> <% io_lib:fwrite("~p", [Data]) %>
>
> Then, request
>
> http://localhost:8080/foo/bar/1/2/3
>
> This will cause catch_all to be called with FuncName "foo" and Params
> ["1", "2", "3"].
>
> Note: 'catch_all' is now a reserved function name. E.g. when a user
> requests http://localhost:8080/foo/catch_all/1/2/3, ErlyWeb won't let
> the user access it directly. Instead, ErlyWeb will tread this function
> as non-existing, and call catch_all(A, "catch_all", ["1", "2", "3"]).
>
> Let me know if you find any problems.
>
> Thanks,
> Yariv
>
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| Guest |
| Posted: Sun Aug 19, 2007 6:42 am |
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Guest
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Update:
I changed the catch_all/3 function so it takes two parameters: A and
Params. So, if the user requests http://host/foo/bar/1/2/3, and the
function 'bar/4' doesn't exist in 'foo_controller', ErlyWeb would call
'foo_controller:catch_all(A, ["bar", "1", "2", "3"]). This makes
catch_all a more natural replacement to erlyweb_util:indexify().
Yariv
On 8/18/07, Yariv Sadan <yarivsadan@gmail.com> wrote:
> Hi,
>
> Following up on the 'metafunctions' thread, I added a feature in
> ErlyWeb letting controllers implement a 'catch_all/3' function that is
> called when clients request a controller function that doesn't exist.
>
> Here's an example of how to use it:
>
> foo_controller:
>
> -module(foo_controller).
> -compile(export_all).
>
> catch_all(A, FuncName, Params) ->
> {data, {A, FuncName, Params}}.
>
> in foo_view.et:
>
> <%@ catch_all(Data) %>
> <% io_lib:fwrite("~p", [Data]) %>
>
> Then, request
>
> http://localhost:8080/foo/bar/1/2/3
>
> This will cause catch_all to be called with FuncName "foo" and Params
> ["1", "2", "3"].
>
> Note: 'catch_all' is now a reserved function name. E.g. when a user
> requests http://localhost:8080/foo/catch_all/1/2/3, ErlyWeb won't let
> the user access it directly. Instead, ErlyWeb will tread this function
> as non-existing, and call catch_all(A, "catch_all", ["1", "2", "3"]).
>
> Let me know if you find any problems.
>
> Thanks,
> Yariv
>
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