- wsgidav.util.parse_xml_body(environ, *, allow_empty=False)#
Read request body XML into an etree.Element.
Return None, if no request body was sent. Raise HTTP_BAD_REQUEST, if something else went wrong.
TODO: this is a very relaxed interpretation: should we raise HTTP_BAD_REQUEST instead, if CONTENT_LENGTH is missing, invalid, or 0?
RFC: For compatibility with HTTP/1.0 applications, HTTP/1.1 requests containing a message-body MUST include a valid Content-Length header field unless the server is known to be HTTP/1.1 compliant. If a request contains a message-body and a Content-Length is not given, the server SHOULD respond with 400 (bad request) if it cannot determine the length of the message, or with 411 (length required) if it wishes to insist on receiving a valid Content-Length.”
So I’d say, we should accept a missing CONTENT_LENGTH, and try to read the content anyway. But WSGI doesn’t guarantee to support input.read() without length(?). At least it locked, when I tried it with a request that had a missing content-type and no body.
Current approach: if CONTENT_LENGTH is
valid and >0: read body (exactly <CONTENT_LENGTH> bytes) and parse the result.
0: Assume empty body and return None or raise exception.
invalid (negative or not a number: raise HTTP_BAD_REQUEST
missing: NOT: Try to read body until end and parse the result. BUT: assume ‘0’
empty string: WSGI allows it to be empty or absent: treated like ‘missing’.