Zope 3 exception views
Project description
This packages provides Zope 3 browser views for some generic exceptions.
System Errors
System Errors are errors representing a system failure. At the application level, they are errors that are uncaught by the application and that a developer hasn’t provided a custom error view for.
Zope provides a default system error view that prints an obnoxius terse message and that sets the response status.
To see an example of this, we’ll create a ZPT page with an intentional error:
>>> print http(r""" ... POST /+/zope.app.zptpage.ZPTPage%3D HTTP/1.1 ... Authorization: Basic mgr:mgrpw ... Content-Length: 739 ... Content-Type: multipart/form-data; boundary=---------------------------125598457818223697821067764270 ... Referer: http://localhost:8081/+/zope.app.zptpage.ZPTPage= ... ... -----------------------------125598457818223697821067764270 ... Content-Disposition: form-data; name="field.source" ... ... <html><body tal:content="container/eek" /></html> ... -----------------------------125598457818223697821067764270 ... Content-Disposition: form-data; name="field.expand.used" ... ... ... -----------------------------125598457818223697821067764270 ... Content-Disposition: form-data; name="field.evaluateInlineCode.used" ... ... ... -----------------------------125598457818223697821067764270 ... Content-Disposition: form-data; name="UPDATE_SUBMIT" ... ... Add ... -----------------------------125598457818223697821067764270 ... Content-Disposition: form-data; name="add_input_name" ... ... test.html ... -----------------------------125598457818223697821067764270-- ... """) HTTP/1.1 303 See Other ... Location: http://localhost/@@contents.html ...
When we visit it, we get a terse error and a 500 status:
We get a system error, because the problem is in the template, not in the URL:
>>> print http(r""" ... GET /test.html HTTP/1.1 ... """) HTTP/1.1 500 Internal Server Error ... A system error occurred. ...
Another way of getting a system error is the occurrence of a system error, such as ComponentLookupError. I have registered a simple view in exception-ftesting.zcml that will raise a component lookup error. So if we call componentlookuperror.html, we should get the error message:
>>> print http(r""" ... GET /componentlookuperror.html HTTP/1.1 ... """) HTTP/1.1 500 Internal Server Error ... A system error occurred. ...
CHANGES
3.6.0 (2009-05-18)
ISystemErrorView interface has been moved to zope.browser.interfaces, leaving BBB import here.
Cut dependency on zope.formlib by requiring newer version of zope.app.pagetemplate which now contains namedtemplate.
3.5.0 (2009-04-06)
Use new zope.authentication instead of zope.app.security.
Removed deprecated code and thus removed dependency on zope.deferredimport.
Removed old zpkg-related SETUP.cfg file.
3.4.2 (2009-01-27)
Substitute zope.app.zapi by direct calls to its wrapped apis. See bug 219302.
Fixed author email and home page.
3.4.1 (2007-10-31)
Resolve ZopeSecurityPolicy deprecation warning.
3.4.0 (2007-10-24)
Initial release independent of the main Zope tree.
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