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How to install dm.zope.rpc_protocol.wsdl_suds
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pypm install dm.zope.rpc-protocol.wsdl-suds
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This is a plugin for dm.zope.rpc, a protocol independent middleware to expose web services over a variety of rpc protocols.
This package is using suds, an advanced soap (1.1) client library under the LGPL license. suds is slightly abused by using it to implement a server component. This abuse requires the use of undocumented implementation details which may change between suds versions. The package has been implemented with suds==0.3.9. It may not work with other versions.
Limitations
The current implementation does not handle exceptions. They are not transformed into SOAP Fault messages (as required by SOAP 1.1) but reported by the underlying transport protocol ("HTTP") (using HTTP error codes with HTML messages). The reason for this limitation: SOAP 1.1 has no complete (self contained) specification for its Fault element but requires externally defined namespaces for completion and I have not yet understood the interaction between WSDL defined exceptions and SOAP Fault elements. Once, I have understood WSDL specified exceptions, this limitation might be removed.
SOAP and WSDL are complex standards with a large number of features. This package does not support all features. For example, it ignores all SOAP headers, even headers with a must_understand declaration (in violation of the SOAP specification). In addition, only a small set of features has been tested: for example, only the document binding; other bindungs might (or might not) work. Over time, more features might be supported, might have been tested.
The current implementation makes use of suds WSDL caching. This can be confusing during WSDL development, as modifications are not seen until the cache times out. Delete the suds cache files in such a case (they usually are in a suds subfolder of the folder typically used for temporary files).
Configuration
As usual with dm.zope.rpc protocol handlers, configuration is via a marshaller instance. The WSDL specific configuration of the WsdlMarshaller is via the fields wsdl_map and default_namespace. wsdl_map maps the namespace found in a method invocation to an url which provides access to the WSDL for this namespace. default_namespace is the namespace to be used for GET requests when method and parameters are specified directly in the url and not via a request entity.
You can find a (simple) example configuration in tests.soap.
Misc
The package has been tested under Zope 2.12 and Zope 2.10. For Zope versions before 2.12, a properly configured dm.zopepatches.xmlrpc is required, to prevent Zope's builtin xmlrpc support to interfere. The above mentioned example configuration shows how dm.zopepatches.xmlrpc can be configured.
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