304 lines
11 KiB
Python
304 lines
11 KiB
Python
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"""Self documenting XML-RPC Server.
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This module can be used to create XML-RPC servers that
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serve pydoc-style documentation in response to HTTP
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GET requests. This documentation is dynamically generated
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based on the functions and methods registered with the
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server.
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This module is built upon the pydoc and SimpleXMLRPCServer
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modules.
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"""
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import pydoc
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import inspect
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import types
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import re
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import sys
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from SimpleXMLRPCServer import (SimpleXMLRPCServer,
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SimpleXMLRPCRequestHandler,
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CGIXMLRPCRequestHandler,
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resolve_dotted_attribute)
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class ServerHTMLDoc(pydoc.HTMLDoc):
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"""Class used to generate pydoc HTML document for a server"""
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def markup(self, text, escape=None, funcs={}, classes={}, methods={}):
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"""Mark up some plain text, given a context of symbols to look for.
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Each context dictionary maps object names to anchor names."""
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escape = escape or self.escape
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results = []
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here = 0
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# XXX Note that this regular expressions does not allow for the
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# hyperlinking of arbitrary strings being used as method
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# names. Only methods with names consisting of word characters
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# and '.'s are hyperlinked.
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pattern = re.compile(r'\b((http|ftp)://\S+[\w/]|'
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r'RFC[- ]?(\d+)|'
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r'PEP[- ]?(\d+)|'
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r'(self\.)?((?:\w|\.)+))\b')
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while 1:
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match = pattern.search(text, here)
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if not match: break
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start, end = match.span()
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results.append(escape(text[here:start]))
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all, scheme, rfc, pep, selfdot, name = match.groups()
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if scheme:
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url = escape(all).replace('"', '"')
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results.append('<a href="%s">%s</a>' % (url, url))
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elif rfc:
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url = 'http://www.rfc-editor.org/rfc/rfc%d.txt' % int(rfc)
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results.append('<a href="%s">%s</a>' % (url, escape(all)))
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elif pep:
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url = 'http://www.python.org/peps/pep-%04d.html' % int(pep)
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results.append('<a href="%s">%s</a>' % (url, escape(all)))
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elif text[end:end+1] == '(':
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results.append(self.namelink(name, methods, funcs, classes))
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elif selfdot:
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results.append('self.<strong>%s</strong>' % name)
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else:
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results.append(self.namelink(name, classes))
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here = end
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results.append(escape(text[here:]))
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return ''.join(results)
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def docroutine(self, object, name=None, mod=None,
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funcs={}, classes={}, methods={}, cl=None):
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"""Produce HTML documentation for a function or method object."""
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anchor = (cl and cl.__name__ or '') + '-' + name
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note = ''
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title = '<a name="%s"><strong>%s</strong></a>' % (anchor, name)
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if inspect.ismethod(object):
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args, varargs, varkw, defaults = inspect.getargspec(object.im_func)
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# exclude the argument bound to the instance, it will be
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# confusing to the non-Python user
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argspec = inspect.formatargspec (
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args[1:],
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varargs,
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varkw,
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defaults,
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formatvalue=self.formatvalue
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)
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elif inspect.isfunction(object):
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args, varargs, varkw, defaults = inspect.getargspec(object)
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argspec = inspect.formatargspec(
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args, varargs, varkw, defaults, formatvalue=self.formatvalue)
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else:
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argspec = '(...)'
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if isinstance(object, types.TupleType):
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argspec = object[0] or argspec
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docstring = object[1] or ""
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else:
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docstring = pydoc.getdoc(object)
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decl = title + argspec + (note and self.grey(
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'<font face="helvetica, arial">%s</font>' % note))
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doc = self.markup(
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docstring, self.preformat, funcs, classes, methods)
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doc = doc and '<dd><tt>%s</tt></dd>' % doc
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return '<dl><dt>%s</dt>%s</dl>\n' % (decl, doc)
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def docserver(self, server_name, package_documentation, methods):
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"""Produce HTML documentation for an XML-RPC server."""
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fdict = {}
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for key, value in methods.items():
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fdict[key] = '#-' + key
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fdict[value] = fdict[key]
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head = '<big><big><strong>%s</strong></big></big>' % server_name
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result = self.heading(head, '#ffffff', '#7799ee')
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doc = self.markup(package_documentation, self.preformat, fdict)
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doc = doc and '<tt>%s</tt>' % doc
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result = result + '<p>%s</p>\n' % doc
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contents = []
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method_items = methods.items()
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method_items.sort()
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for key, value in method_items:
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contents.append(self.docroutine(value, key, funcs=fdict))
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result = result + self.bigsection(
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'Methods', '#ffffff', '#eeaa77', pydoc.join(contents))
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return result
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class XMLRPCDocGenerator:
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"""Generates documentation for an XML-RPC server.
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This class is designed as mix-in and should not
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be constructed directly.
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"""
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def __init__(self):
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# setup variables used for HTML documentation
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self.server_name = 'XML-RPC Server Documentation'
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self.server_documentation = \
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"This server exports the following methods through the XML-RPC "\
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"protocol."
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self.server_title = 'XML-RPC Server Documentation'
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def set_server_title(self, server_title):
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"""Set the HTML title of the generated server documentation"""
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self.server_title = server_title
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def set_server_name(self, server_name):
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"""Set the name of the generated HTML server documentation"""
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self.server_name = server_name
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def set_server_documentation(self, server_documentation):
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"""Set the documentation string for the entire server."""
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self.server_documentation = server_documentation
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def generate_html_documentation(self):
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"""generate_html_documentation() => html documentation for the server
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Generates HTML documentation for the server using introspection for
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installed functions and instances that do not implement the
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_dispatch method. Alternatively, instances can choose to implement
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the _get_method_argstring(method_name) method to provide the
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argument string used in the documentation and the
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_methodHelp(method_name) method to provide the help text used
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in the documentation."""
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methods = {}
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for method_name in self.system_listMethods():
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if self.funcs.has_key(method_name):
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method = self.funcs[method_name]
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elif self.instance is not None:
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method_info = [None, None] # argspec, documentation
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if hasattr(self.instance, '_get_method_argstring'):
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method_info[0] = self.instance._get_method_argstring(method_name)
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if hasattr(self.instance, '_methodHelp'):
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method_info[1] = self.instance._methodHelp(method_name)
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method_info = tuple(method_info)
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if method_info != (None, None):
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method = method_info
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elif not hasattr(self.instance, '_dispatch'):
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try:
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method = resolve_dotted_attribute(
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self.instance,
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method_name
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)
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except AttributeError:
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method = method_info
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else:
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method = method_info
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else:
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assert 0, "Could not find method in self.functions and no "\
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"instance installed"
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methods[method_name] = method
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documenter = ServerHTMLDoc()
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documentation = documenter.docserver(
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self.server_name,
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self.server_documentation,
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methods
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)
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return documenter.page(self.server_title, documentation)
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class DocXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
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"""XML-RPC and documentation request handler class.
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Handles all HTTP POST requests and attempts to decode them as
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XML-RPC requests.
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Handles all HTTP GET requests and interprets them as requests
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for documentation.
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"""
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def do_GET(self):
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"""Handles the HTTP GET request.
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Interpret all HTTP GET requests as requests for server
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documentation.
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"""
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response = self.server.generate_html_documentation()
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self.send_response(200)
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self.send_header("Content-type", "text/html")
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self.send_header("Content-length", str(len(response)))
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self.end_headers()
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self.wfile.write(response)
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# shut down the connection
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self.wfile.flush()
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self.connection.shutdown(1)
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class DocXMLRPCServer( SimpleXMLRPCServer,
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XMLRPCDocGenerator):
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"""XML-RPC and HTML documentation server.
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Adds the ability to serve server documentation to the capabilities
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of SimpleXMLRPCServer.
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"""
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def __init__(self, addr, requestHandler=DocXMLRPCRequestHandler,
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logRequests=1):
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SimpleXMLRPCServer.__init__(self, addr, requestHandler, logRequests)
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XMLRPCDocGenerator.__init__(self)
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class DocCGIXMLRPCRequestHandler( CGIXMLRPCRequestHandler,
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XMLRPCDocGenerator):
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"""Handler for XML-RPC data and documentation requests passed through
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CGI"""
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def handle_get(self):
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"""Handles the HTTP GET request.
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Interpret all HTTP GET requests as requests for server
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documentation.
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"""
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response = self.generate_html_documentation()
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print 'Content-Type: text/html'
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print 'Content-Length: %d' % len(response)
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print
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sys.stdout.write(response)
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def __init__(self):
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CGIXMLRPCRequestHandler.__init__(self)
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XMLRPCDocGenerator.__init__(self)
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if __name__ == '__main__':
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def deg_to_rad(deg):
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"""deg_to_rad(90) => 1.5707963267948966
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Converts an angle in degrees to an angle in radians"""
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import math
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return deg * math.pi / 180
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server = DocXMLRPCServer(("localhost", 8000))
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server.set_server_title("Math Server")
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server.set_server_name("Math XML-RPC Server")
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server.set_server_documentation("""This server supports various mathematical functions.
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You can use it from Python as follows:
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>>> from xmlrpclib import ServerProxy
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>>> s = ServerProxy("http://localhost:8000")
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>>> s.deg_to_rad(90.0)
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1.5707963267948966""")
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server.register_function(deg_to_rad)
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server.register_introspection_functions()
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server.serve_forever()
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