X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/96d13ead60e0c798146ffaadd951877a8077ad9d..9c4c7a3325eedfcff4bb3550218b1f47275402b0:/apps/piston/emitters.py?ds=inline

diff --git a/apps/piston/emitters.py b/apps/piston/emitters.py
deleted file mode 100644
index c2116d22b..000000000
--- a/apps/piston/emitters.py
+++ /dev/null
@@ -1,441 +0,0 @@
-from __future__ import generators
-
-import decimal, re, inspect
-import copy
-
-try:
-    # yaml isn't standard with python.  It shouldn't be required if it
-    # isn't used.
-    import yaml
-except ImportError:
-    yaml = None
-
-# Fallback since `any` isn't in Python <2.5
-try:
-    any
-except NameError:
-    def any(iterable):
-        for element in iterable:
-            if element:
-                return True
-        return False
-
-from django.db.models.query import QuerySet
-from django.db.models import Model, permalink
-from django.utils import simplejson
-from django.utils.xmlutils import SimplerXMLGenerator
-from django.utils.encoding import smart_unicode
-from django.core.urlresolvers import reverse, NoReverseMatch
-from django.core.serializers.json import DateTimeAwareJSONEncoder
-from django.http import HttpResponse
-from django.core import serializers
-
-from utils import HttpStatusCode, Mimer
-
-try:
-    import cStringIO as StringIO
-except ImportError:
-    import StringIO
-
-try:
-    import cPickle as pickle
-except ImportError:
-    import pickle
-
-# Allow people to change the reverser (default `permalink`).
-reverser = permalink
-
-class Emitter(object):
-    """
-    Super emitter. All other emitters should subclass
-    this one. It has the `construct` method which
-    conveniently returns a serialized `dict`. This is
-    usually the only method you want to use in your
-    emitter. See below for examples.
-
-    `RESERVED_FIELDS` was introduced when better resource
-    method detection came, and we accidentially caught these
-    as the methods on the handler. Issue58 says that's no good.
-    """
-    EMITTERS = { }
-    RESERVED_FIELDS = set([ 'read', 'update', 'create',
-                            'delete', 'model', 'anonymous',
-                            'allowed_methods', 'fields', 'exclude' ])
-
-    def __init__(self, payload, typemapper, handler, fields=(), anonymous=True):
-        self.typemapper = typemapper
-        self.data = payload
-        self.handler = handler
-        self.fields = fields
-        self.anonymous = anonymous
-
-        if isinstance(self.data, Exception):
-            raise
-
-    def method_fields(self, handler, fields):
-        if not handler:
-            return { }
-
-        ret = dict()
-
-        for field in fields - Emitter.RESERVED_FIELDS:
-            t = getattr(handler, str(field), None)
-
-            if t and callable(t):
-                ret[field] = t
-
-        return ret
-
-    def construct(self):
-        """
-        Recursively serialize a lot of types, and
-        in cases where it doesn't recognize the type,
-        it will fall back to Django's `smart_unicode`.
-
-        Returns `dict`.
-        """
-        def _any(thing, fields=()):
-            """
-            Dispatch, all types are routed through here.
-            """
-            ret = None
-
-            if isinstance(thing, QuerySet):
-                ret = _qs(thing, fields=fields)
-            elif isinstance(thing, (tuple, list)):
-                ret = _list(thing)
-            elif isinstance(thing, dict):
-                ret = _dict(thing)
-            elif isinstance(thing, decimal.Decimal):
-                ret = str(thing)
-            elif isinstance(thing, Model):
-                ret = _model(thing, fields=fields)
-            elif isinstance(thing, HttpResponse):
-                raise HttpStatusCode(thing)
-            elif inspect.isfunction(thing):
-                if not inspect.getargspec(thing)[0]:
-                    ret = _any(thing())
-            elif hasattr(thing, '__emittable__'):
-                f = thing.__emittable__
-                if inspect.ismethod(f) and len(inspect.getargspec(f)[0]) == 1:
-                    ret = _any(f())
-            elif repr(thing).startswith("<django.db.models.fields.related.RelatedManager"):
-                ret = _any(thing.all())
-            else:
-                ret = smart_unicode(thing, strings_only=True)
-
-            return ret
-
-        def _fk(data, field):
-            """
-            Foreign keys.
-            """
-            return _any(getattr(data, field.name))
-
-        def _related(data, fields=()):
-            """
-            Foreign keys.
-            """
-            return [ _model(m, fields) for m in data.iterator() ]
-
-        def _m2m(data, field, fields=()):
-            """
-            Many to many (re-route to `_model`.)
-            """
-            return [ _model(m, fields) for m in getattr(data, field.name).iterator() ]
-
-        def _model(data, fields=()):
-            """
-            Models. Will respect the `fields` and/or
-            `exclude` on the handler (see `typemapper`.)
-            """
-            ret = { }
-            handler = self.in_typemapper(type(data), self.anonymous)
-            get_absolute_uri = False
-
-            if handler or fields:
-                v = lambda f: getattr(data, f.attname)
-
-                if not fields:
-                    """
-                    Fields was not specified, try to find teh correct
-                    version in the typemapper we were sent.
-                    """
-                    mapped = self.in_typemapper(type(data), self.anonymous)
-                    get_fields = set(mapped.fields)
-                    exclude_fields = set(mapped.exclude).difference(get_fields)
-
-                    if 'absolute_uri' in get_fields:
-                        get_absolute_uri = True
-
-                    if not get_fields:
-                        get_fields = set([ f.attname.replace("_id", "", 1)
-                            for f in data._meta.fields ])
-
-                    # sets can be negated.
-                    for exclude in exclude_fields:
-                        if isinstance(exclude, basestring):
-                            get_fields.discard(exclude)
-
-                        elif isinstance(exclude, re._pattern_type):
-                            for field in get_fields.copy():
-                                if exclude.match(field):
-                                    get_fields.discard(field)
-
-                else:
-                    get_fields = set(fields)
-
-                met_fields = self.method_fields(handler, get_fields)
-
-                for f in data._meta.local_fields:
-                    if f.serialize and not any([ p in met_fields for p in [ f.attname, f.name ]]):
-                        if not f.rel:
-                            if f.attname in get_fields:
-                                ret[f.attname] = _any(v(f))
-                                get_fields.remove(f.attname)
-                        else:
-                            if f.attname[:-3] in get_fields:
-                                ret[f.name] = _fk(data, f)
-                                get_fields.remove(f.name)
-
-                for mf in data._meta.many_to_many:
-                    if mf.serialize and mf.attname not in met_fields:
-                        if mf.attname in get_fields:
-                            ret[mf.name] = _m2m(data, mf)
-                            get_fields.remove(mf.name)
-
-                # try to get the remainder of fields
-                for maybe_field in get_fields:
-                    if isinstance(maybe_field, (list, tuple)):
-                        model, fields = maybe_field
-                        inst = getattr(data, model, None)
-
-                        if inst:
-                            if hasattr(inst, 'all'):
-                                ret[model] = _related(inst, fields)
-                            elif callable(inst):
-                                if len(inspect.getargspec(inst)[0]) == 1:
-                                    ret[model] = _any(inst(), fields)
-                            else:
-                                ret[model] = _model(inst, fields)
-
-                    elif maybe_field in met_fields:
-                        # Overriding normal field which has a "resource method"
-                        # so you can alter the contents of certain fields without
-                        # using different names.
-                        ret[maybe_field] = _any(met_fields[maybe_field](data))
-
-                    else:
-                        maybe = getattr(data, maybe_field, None)
-                        if maybe:
-                            if callable(maybe):
-                                if len(inspect.getargspec(maybe)[0]) == 1:
-                                    ret[maybe_field] = _any(maybe())
-                            else:
-                                ret[maybe_field] = _any(maybe)
-                        else:
-                            handler_f = getattr(handler or self.handler, maybe_field, None)
-
-                            if handler_f:
-                                ret[maybe_field] = _any(handler_f(data))
-
-            else:
-                for f in data._meta.fields:
-                    ret[f.attname] = _any(getattr(data, f.attname))
-
-                fields = dir(data.__class__) + ret.keys()
-                add_ons = [k for k in dir(data) if k not in fields]
-
-                for k in add_ons:
-                    ret[k] = _any(getattr(data, k))
-
-            # resouce uri
-            if self.in_typemapper(type(data), self.anonymous):
-                handler = self.in_typemapper(type(data), self.anonymous)
-                if hasattr(handler, 'resource_uri'):
-                    url_id, fields = handler.resource_uri(data)
-
-                    try:
-                        ret['resource_uri'] = reverser( lambda: (url_id, fields) )()
-                    except NoReverseMatch, e:
-                        pass
-
-            if hasattr(data, 'get_api_url') and 'resource_uri' not in ret:
-                try: ret['resource_uri'] = data.get_api_url()
-                except: pass
-
-            # absolute uri
-            if hasattr(data, 'get_absolute_url') and get_absolute_uri:
-                try: ret['absolute_uri'] = data.get_absolute_url()
-                except: pass
-
-            return ret
-
-        def _qs(data, fields=()):
-            """
-            Querysets.
-            """
-            return [ _any(v, fields) for v in data ]
-
-        def _list(data):
-            """
-            Lists.
-            """
-            return [ _any(v) for v in data ]
-
-        def _dict(data):
-            """
-            Dictionaries.
-            """
-            return dict([ (k, _any(v)) for k, v in data.iteritems() ])
-
-        # Kickstart the seralizin'.
-        return _any(self.data, self.fields)
-
-    def in_typemapper(self, model, anonymous):
-        for klass, (km, is_anon) in self.typemapper.iteritems():
-            if model is km and is_anon is anonymous:
-                return klass
-
-    def render(self):
-        """
-        This super emitter does not implement `render`,
-        this is a job for the specific emitter below.
-        """
-        raise NotImplementedError("Please implement render.")
-
-    def stream_render(self, request, stream=True):
-        """
-        Tells our patched middleware not to look
-        at the contents, and returns a generator
-        rather than the buffered string. Should be
-        more memory friendly for large datasets.
-        """
-        yield self.render(request)
-
-    @classmethod
-    def get(cls, format):
-        """
-        Gets an emitter, returns the class and a content-type.
-        """
-        if cls.EMITTERS.has_key(format):
-            return cls.EMITTERS.get(format)
-
-        raise ValueError("No emitters found for type %s" % format)
-
-    @classmethod
-    def register(cls, name, klass, content_type='text/plain'):
-        """
-        Register an emitter.
-
-        Parameters::
-         - `name`: The name of the emitter ('json', 'xml', 'yaml', ...)
-         - `klass`: The emitter class.
-         - `content_type`: The content type to serve response as.
-        """
-        cls.EMITTERS[name] = (klass, content_type)
-
-    @classmethod
-    def unregister(cls, name):
-        """
-        Remove an emitter from the registry. Useful if you don't
-        want to provide output in one of the built-in emitters.
-        """
-        return cls.EMITTERS.pop(name, None)
-
-class XMLEmitter(Emitter):
-    def _to_xml(self, xml, data):
-        if isinstance(data, (list, tuple)):
-            for item in data:
-                xml.startElement("resource", {})
-                self._to_xml(xml, item)
-                xml.endElement("resource")
-        elif isinstance(data, dict):
-            for key, value in data.iteritems():
-                xml.startElement(key, {})
-                self._to_xml(xml, value)
-                xml.endElement(key)
-        else:
-            xml.characters(smart_unicode(data))
-
-    def render(self, request):
-        stream = StringIO.StringIO()
-
-        xml = SimplerXMLGenerator(stream, "utf-8")
-        xml.startDocument()
-        xml.startElement("response", {})
-
-        self._to_xml(xml, self.construct())
-
-        xml.endElement("response")
-        xml.endDocument()
-
-        return stream.getvalue()
-
-Emitter.register('xml', XMLEmitter, 'text/xml; charset=utf-8')
-Mimer.register(lambda *a: None, ('text/xml',))
-
-class JSONEmitter(Emitter):
-    """
-    JSON emitter, understands timestamps.
-    """
-    def render(self, request):
-        cb = request.GET.get('callback')
-        seria = simplejson.dumps(self.construct(), cls=DateTimeAwareJSONEncoder, ensure_ascii=False, indent=4)
-
-        # Callback
-        if cb:
-            return '%s(%s)' % (cb, seria)
-
-        return seria
-
-Emitter.register('json', JSONEmitter, 'application/json; charset=utf-8')
-Mimer.register(simplejson.loads, ('application/json',))
-
-class YAMLEmitter(Emitter):
-    """
-    YAML emitter, uses `safe_dump` to omit the
-    specific types when outputting to non-Python.
-    """
-    def render(self, request):
-        return yaml.safe_dump(self.construct())
-
-if yaml:  # Only register yaml if it was import successfully.
-    Emitter.register('yaml', YAMLEmitter, 'application/x-yaml; charset=utf-8')
-    Mimer.register(lambda s: dict(yaml.load(s)), ('application/x-yaml',))
-
-class PickleEmitter(Emitter):
-    """
-    Emitter that returns Python pickled.
-    """
-    def render(self, request):
-        return pickle.dumps(self.construct())
-
-Emitter.register('pickle', PickleEmitter, 'application/python-pickle')
-
-"""
-WARNING: Accepting arbitrary pickled data is a huge security concern.
-The unpickler has been disabled by default now, and if you want to use
-it, please be aware of what implications it will have.
-
-Read more: http://nadiana.com/python-pickle-insecure
-
-Uncomment the line below to enable it. You're doing so at your own risk.
-"""
-# Mimer.register(pickle.loads, ('application/python-pickle',))
-
-class DjangoEmitter(Emitter):
-    """
-    Emitter for the Django serialized format.
-    """
-    def render(self, request, format='xml'):
-        if isinstance(self.data, HttpResponse):
-            return self.data
-        elif isinstance(self.data, (int, str)):
-            response = self.data
-        else:
-            response = serializers.serialize(format, self.data, indent=True)
-
-        return response
-
-Emitter.register('django', DjangoEmitter, 'text/xml; charset=utf-8')