[Zope] ZPublisher.Client misleading exceptions
Jim Fulton
jim@digicool.com
Wed, 22 Dec 1999 09:40:01 -0500
R.Taylor@eris.dera.gov.uk wrote:
>
> We are using ZPublisher.Client to call a "manage_add...." function to create a
> ZClass instance. We are seeing some strange exceptions.
>
> The "manage_add" function works through the web management interface but when
> called from ZPublisher.Client it creates the instance and then generates an
> exception.
>
> In the following code place, uname, pwd are strings and kw is a dictionary.
> place is 'http://zopehost/folder/manage_addProduct/Comment/manage_addComment'
>
> def go(place,uname,pwd,kw):
> import Client
> return(apply(Client.Function(place,username=uname, password=pwd), (), kw))
>
> The desired object is created, however an exception is also generated.
>
> Traceback (innermost last):
> File "<stdin>", line 1, in ?
> File "autoadd.py", line 14, in addComment
> go(place,uname,pwd,kw)
> File "autoadd.py", line 6, in go
> return(apply(Client.Function(place,username=uname, password=pwd), (), kw))
> File "/usr/local/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Client.py", line 225, in __call__
> self.handleError(query, ec, em, headers, response)
> File "/usr/local/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Client.py", line 240, in handleError
> raise t, RemoteException(t,v,f,l,self.url,query,ec,em,response)
> bci.ServerError: 302 (File: Unknown Line: Unknown)
> 302 Moved Temporarily for http://aedmondson:8080/Ed/manage_addProduct/Comment/manage_addComment
>
> Whereas creating this object through the ZOPE management interface no error
> occurs, and we get redirected to the correct management page.
>
> Can anyone explain this exception and why it is being generated.
A redirect is generated (in HTTP) by returning a 302 status code.
The client is treatng this as an error. There should probably
be an option in the client to treat redirects as success.
> On a related note:
>
> When trying to create an object with a already-used id (using the code above)
> through the ZPublisher.Client we get the following exception.
>
> Traceback (innermost last):
> File "<stdin>", line 1, in ?
> File "autoadd.py", line 14, in addComment
> go(place,uname,pwd,kw)
> File "autoadd.py", line 6, in go
> return(apply(Client.Function(place,username=uname, password=pwd), (), kw))
> File "/usr/local/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Client.py", line 225, in __call__
> self.handleError(query, ec, em, headers, response)
> File "/usr/local/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Client.py", line 240, in handleError
> raise t, RemoteException(t,v,f,l,self.url,query,ec,em,response)
> bci.NotFound: <HTML><HEAD><TITLE>Ed's discussions test</TITLE></HEAD><BODY BGCOLOR="#FFFFFF"> <TABLE BORDER="0" WIDTH="100%"> <TR VALIGN="TOP"> <TD WIDTH="10%" ALIGN="CENTER"> <IMG SRC="http://aedmondson/p_/ZButton" ALT="Zope"> </TD> <TD WIDTH="90%"> <H2>Zope Err (File: /usr/local/Zope-2.0.1-linux2-x86/lib/python/OFS/ObjectManager.py Line: 209)
> 400 Bad Request for http://aedmondson:8080/Ed/manage_addProduct/Comment/manage_addComment
>
> Whereas through the ZOPE management interface attempting to create an instance
> with same id produced this:
>
> <H2>Zope Error</H2>
> <P>Zope has encountered an error while publishing this resource.
> </P>
> <P>
> <STRONG>Error Type: Bad Request</STRONG><BR>
> <STRONG>Error Value: The id 1 is invalid - it is already in use.</STRONG><BR>
> </P>
>
> We fully except to get the error but the error from the web management interface
> is much more informative. How do we access this useful diagnostics from
> ZPublisher.Client.
Perhaps the client should include the error body when it raises the error.
Patches accepted. ;)
Jim
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