django-rest-framework/rest_framework/renderers.py
Niyaz 02d9bfc2dd
Fixes BrowsableAPIRenderer for usage with ListSerializer. (#7530)
Renders list of items in raw_data_form and does not renders form in
template while using with `ListSerializer` (`many=True`).
2023-06-12 19:28:28 +06:00

1079 lines
40 KiB
Python

"""
Renderers are used to serialize a response into specific media types.
They give us a generic way of being able to handle various media types
on the response, such as JSON encoded data or HTML output.
REST framework also provides an HTML renderer that renders the browsable API.
"""
import base64
import contextlib
from urllib import parse
from django import forms
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from django.core.paginator import Page
from django.template import engines, loader
from django.urls import NoReverseMatch
from django.utils.html import mark_safe
from django.utils.safestring import SafeString
from rest_framework import VERSION, exceptions, serializers, status
from rest_framework.compat import (
INDENT_SEPARATORS, LONG_SEPARATORS, SHORT_SEPARATORS, coreapi, coreschema,
parse_header_parameters, pygments_css, yaml
)
from rest_framework.exceptions import ParseError
from rest_framework.request import is_form_media_type, override_method
from rest_framework.settings import api_settings
from rest_framework.utils import encoders, json
from rest_framework.utils.breadcrumbs import get_breadcrumbs
from rest_framework.utils.field_mapping import ClassLookupDict
def zero_as_none(value):
return None if value == 0 else value
class BaseRenderer:
"""
All renderers should extend this class, setting the `media_type`
and `format` attributes, and override the `.render()` method.
"""
media_type = None
format = None
charset = 'utf-8'
render_style = 'text'
def render(self, data, accepted_media_type=None, renderer_context=None):
raise NotImplementedError('Renderer class requires .render() to be implemented')
class JSONRenderer(BaseRenderer):
"""
Renderer which serializes to JSON.
"""
media_type = 'application/json'
format = 'json'
encoder_class = encoders.JSONEncoder
ensure_ascii = not api_settings.UNICODE_JSON
compact = api_settings.COMPACT_JSON
strict = api_settings.STRICT_JSON
# We don't set a charset because JSON is a binary encoding,
# that can be encoded as utf-8, utf-16 or utf-32.
# See: https://www.ietf.org/rfc/rfc4627.txt
# Also: http://lucumr.pocoo.org/2013/7/19/application-mimetypes-and-encodings/
charset = None
def get_indent(self, accepted_media_type, renderer_context):
if accepted_media_type:
# If the media type looks like 'application/json; indent=4',
# then pretty print the result.
# Note that we coerce `indent=0` into `indent=None`.
base_media_type, params = parse_header_parameters(accepted_media_type)
with contextlib.suppress(KeyError, ValueError, TypeError):
return zero_as_none(max(min(int(params['indent']), 8), 0))
# If 'indent' is provided in the context, then pretty print the result.
# E.g. If we're being called by the BrowsableAPIRenderer.
return renderer_context.get('indent', None)
def render(self, data, accepted_media_type=None, renderer_context=None):
"""
Render `data` into JSON, returning a bytestring.
"""
if data is None:
return b''
renderer_context = renderer_context or {}
indent = self.get_indent(accepted_media_type, renderer_context)
if indent is None:
separators = SHORT_SEPARATORS if self.compact else LONG_SEPARATORS
else:
separators = INDENT_SEPARATORS
ret = json.dumps(
data, cls=self.encoder_class,
indent=indent, ensure_ascii=self.ensure_ascii,
allow_nan=not self.strict, separators=separators
)
# We always fully escape \u2028 and \u2029 to ensure we output JSON
# that is a strict javascript subset.
# See: https://gist.github.com/damncabbage/623b879af56f850a6ddc
ret = ret.replace('\u2028', '\\u2028').replace('\u2029', '\\u2029')
return ret.encode()
class TemplateHTMLRenderer(BaseRenderer):
"""
An HTML renderer for use with templates.
The data supplied to the Response object should be a dictionary that will
be used as context for the template.
The template name is determined by (in order of preference):
1. An explicit `.template_name` attribute set on the response.
2. An explicit `.template_name` attribute set on this class.
3. The return result of calling `view.get_template_names()`.
For example:
data = {'users': User.objects.all()}
return Response(data, template_name='users.html')
For pre-rendered HTML, see StaticHTMLRenderer.
"""
media_type = 'text/html'
format = 'html'
template_name = None
exception_template_names = [
'%(status_code)s.html',
'api_exception.html'
]
charset = 'utf-8'
def render(self, data, accepted_media_type=None, renderer_context=None):
"""
Renders data to HTML, using Django's standard template rendering.
The template name is determined by (in order of preference):
1. An explicit .template_name set on the response.
2. An explicit .template_name set on this class.
3. The return result of calling view.get_template_names().
"""
renderer_context = renderer_context or {}
view = renderer_context['view']
request = renderer_context['request']
response = renderer_context['response']
if response.exception:
template = self.get_exception_template(response)
else:
template_names = self.get_template_names(response, view)
template = self.resolve_template(template_names)
if hasattr(self, 'resolve_context'):
# Fallback for older versions.
context = self.resolve_context(data, request, response)
else:
context = self.get_template_context(data, renderer_context)
return template.render(context, request=request)
def resolve_template(self, template_names):
return loader.select_template(template_names)
def get_template_context(self, data, renderer_context):
response = renderer_context['response']
if response.exception:
data['status_code'] = response.status_code
return data
def get_template_names(self, response, view):
if response.template_name:
return [response.template_name]
elif self.template_name:
return [self.template_name]
elif hasattr(view, 'get_template_names'):
return view.get_template_names()
elif hasattr(view, 'template_name'):
return [view.template_name]
raise ImproperlyConfigured(
'Returned a template response with no `template_name` attribute set on either the view or response'
)
def get_exception_template(self, response):
template_names = [name % {'status_code': response.status_code}
for name in self.exception_template_names]
try:
# Try to find an appropriate error template
return self.resolve_template(template_names)
except Exception:
# Fall back to using eg '404 Not Found'
body = '%d %s' % (response.status_code, response.status_text.title())
template = engines['django'].from_string(body)
return template
# Note, subclass TemplateHTMLRenderer simply for the exception behavior
class StaticHTMLRenderer(TemplateHTMLRenderer):
"""
An HTML renderer class that simply returns pre-rendered HTML.
The data supplied to the Response object should be a string representing
the pre-rendered HTML content.
For example:
data = '<html><body>example</body></html>'
return Response(data)
For template rendered HTML, see TemplateHTMLRenderer.
"""
media_type = 'text/html'
format = 'html'
charset = 'utf-8'
def render(self, data, accepted_media_type=None, renderer_context=None):
renderer_context = renderer_context or {}
response = renderer_context.get('response')
if response and response.exception:
request = renderer_context['request']
template = self.get_exception_template(response)
if hasattr(self, 'resolve_context'):
context = self.resolve_context(data, request, response)
else:
context = self.get_template_context(data, renderer_context)
return template.render(context, request=request)
return data
class HTMLFormRenderer(BaseRenderer):
"""
Renderers serializer data into an HTML form.
If the serializer was instantiated without an object then this will
return an HTML form not bound to any object,
otherwise it will return an HTML form with the appropriate initial data
populated from the object.
Note that rendering of field and form errors is not currently supported.
"""
media_type = 'text/html'
format = 'form'
charset = 'utf-8'
template_pack = 'rest_framework/vertical/'
base_template = 'form.html'
default_style = ClassLookupDict({
serializers.Field: {
'base_template': 'input.html',
'input_type': 'text'
},
serializers.EmailField: {
'base_template': 'input.html',
'input_type': 'email'
},
serializers.URLField: {
'base_template': 'input.html',
'input_type': 'url'
},
serializers.IntegerField: {
'base_template': 'input.html',
'input_type': 'number'
},
serializers.FloatField: {
'base_template': 'input.html',
'input_type': 'number'
},
serializers.DateTimeField: {
'base_template': 'input.html',
'input_type': 'datetime-local'
},
serializers.DateField: {
'base_template': 'input.html',
'input_type': 'date'
},
serializers.TimeField: {
'base_template': 'input.html',
'input_type': 'time'
},
serializers.FileField: {
'base_template': 'input.html',
'input_type': 'file'
},
serializers.BooleanField: {
'base_template': 'checkbox.html'
},
serializers.ChoiceField: {
'base_template': 'select.html', # Also valid: 'radio.html'
},
serializers.MultipleChoiceField: {
'base_template': 'select_multiple.html', # Also valid: 'checkbox_multiple.html'
},
serializers.RelatedField: {
'base_template': 'select.html', # Also valid: 'radio.html'
},
serializers.ManyRelatedField: {
'base_template': 'select_multiple.html', # Also valid: 'checkbox_multiple.html'
},
serializers.Serializer: {
'base_template': 'fieldset.html'
},
serializers.ListSerializer: {
'base_template': 'list_fieldset.html'
},
serializers.ListField: {
'base_template': 'list_field.html'
},
serializers.DictField: {
'base_template': 'dict_field.html'
},
serializers.FilePathField: {
'base_template': 'select.html',
},
serializers.JSONField: {
'base_template': 'textarea.html',
},
})
def render_field(self, field, parent_style):
if isinstance(field._field, serializers.HiddenField):
return ''
style = self.default_style[field].copy()
style.update(field.style)
if 'template_pack' not in style:
style['template_pack'] = parent_style.get('template_pack', self.template_pack)
style['renderer'] = self
# Get a clone of the field with text-only value representation.
field = field.as_form_field()
if style.get('input_type') == 'datetime-local' and isinstance(field.value, str):
field.value = field.value.rstrip('Z')
if 'template' in style:
template_name = style['template']
else:
template_name = style['template_pack'].strip('/') + '/' + style['base_template']
template = loader.get_template(template_name)
context = {'field': field, 'style': style}
return template.render(context)
def render(self, data, accepted_media_type=None, renderer_context=None):
"""
Render serializer data and return an HTML form, as a string.
"""
renderer_context = renderer_context or {}
form = data.serializer
style = renderer_context.get('style', {})
if 'template_pack' not in style:
style['template_pack'] = self.template_pack
style['renderer'] = self
template_pack = style['template_pack'].strip('/')
template_name = template_pack + '/' + self.base_template
template = loader.get_template(template_name)
context = {
'form': form,
'style': style
}
return template.render(context)
class BrowsableAPIRenderer(BaseRenderer):
"""
HTML renderer used to self-document the API.
"""
media_type = 'text/html'
format = 'api'
template = 'rest_framework/api.html'
filter_template = 'rest_framework/filters/base.html'
code_style = 'emacs'
charset = 'utf-8'
form_renderer_class = HTMLFormRenderer
def get_default_renderer(self, view):
"""
Return an instance of the first valid renderer.
(Don't use another documenting renderer.)
"""
renderers = [renderer for renderer in view.renderer_classes
if not issubclass(renderer, BrowsableAPIRenderer)]
non_template_renderers = [renderer for renderer in renderers
if not hasattr(renderer, 'get_template_names')]
if not renderers:
return None
elif non_template_renderers:
return non_template_renderers[0]()
return renderers[0]()
def get_content(self, renderer, data,
accepted_media_type, renderer_context):
"""
Get the content as if it had been rendered by the default
non-documenting renderer.
"""
if not renderer:
return '[No renderers were found]'
renderer_context['indent'] = 4
content = renderer.render(data, accepted_media_type, renderer_context)
render_style = getattr(renderer, 'render_style', 'text')
assert render_style in ['text', 'binary'], 'Expected .render_style ' \
'"text" or "binary", but got "%s"' % render_style
if render_style == 'binary':
return '[%d bytes of binary content]' % len(content)
return content.decode('utf-8') if isinstance(content, bytes) else content
def show_form_for_method(self, view, method, request, obj):
"""
Returns True if a form should be shown for this method.
"""
if method not in view.allowed_methods:
return # Not a valid method
try:
view.check_permissions(request)
if obj is not None:
view.check_object_permissions(request, obj)
except exceptions.APIException:
return False # Doesn't have permissions
return True
def _get_serializer(self, serializer_class, view_instance, request, *args, **kwargs):
kwargs['context'] = {
'request': request,
'format': self.format,
'view': view_instance
}
return serializer_class(*args, **kwargs)
def get_rendered_html_form(self, data, view, method, request):
"""
Return a string representing a rendered HTML form, possibly bound to
either the input or output data.
In the absence of the View having an associated form then return None.
"""
# See issue #2089 for refactoring this.
serializer = getattr(data, 'serializer', None)
if serializer and not getattr(serializer, 'many', False):
instance = getattr(serializer, 'instance', None)
if isinstance(instance, Page):
instance = None
else:
instance = None
# If this is valid serializer data, and the form is for the same
# HTTP method as was used in the request then use the existing
# serializer instance, rather than dynamically creating a new one.
if request.method == method and serializer is not None:
try:
kwargs = {'data': request.data}
except ParseError:
kwargs = {}
existing_serializer = serializer
else:
kwargs = {}
existing_serializer = None
with override_method(view, request, method) as request:
if not self.show_form_for_method(view, method, request, instance):
return
if method in ('DELETE', 'OPTIONS'):
return True # Don't actually need to return a form
has_serializer = getattr(view, 'get_serializer', None)
has_serializer_class = getattr(view, 'serializer_class', None)
if (
(not has_serializer and not has_serializer_class) or
not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)
):
return
if existing_serializer is not None:
with contextlib.suppress(TypeError):
return self.render_form_for_serializer(existing_serializer)
if has_serializer:
if method in ('PUT', 'PATCH'):
serializer = view.get_serializer(instance=instance, **kwargs)
else:
serializer = view.get_serializer(**kwargs)
else:
# at this point we must have a serializer_class
if method in ('PUT', 'PATCH'):
serializer = self._get_serializer(view.serializer_class, view,
request, instance=instance, **kwargs)
else:
serializer = self._get_serializer(view.serializer_class, view,
request, **kwargs)
return self.render_form_for_serializer(serializer)
def render_form_for_serializer(self, serializer):
if isinstance(serializer, serializers.ListSerializer):
return None
if hasattr(serializer, 'initial_data'):
serializer.is_valid()
form_renderer = self.form_renderer_class()
return form_renderer.render(
serializer.data,
self.accepted_media_type,
{'style': {'template_pack': 'rest_framework/horizontal'}}
)
def get_raw_data_form(self, data, view, method, request):
"""
Returns a form that allows for arbitrary content types to be tunneled
via standard HTML forms.
(Which are typically application/x-www-form-urlencoded)
"""
# See issue #2089 for refactoring this.
serializer = getattr(data, 'serializer', None)
if serializer and not getattr(serializer, 'many', False):
instance = getattr(serializer, 'instance', None)
if isinstance(instance, Page):
instance = None
else:
instance = None
with override_method(view, request, method) as request:
# Check permissions
if not self.show_form_for_method(view, method, request, instance):
return
# If possible, serialize the initial content for the generic form
default_parser = view.parser_classes[0]
renderer_class = getattr(default_parser, 'renderer_class', None)
if hasattr(view, 'get_serializer') and renderer_class:
# View has a serializer defined and parser class has a
# corresponding renderer that can be used to render the data.
if method in ('PUT', 'PATCH'):
serializer = view.get_serializer(instance=instance)
else:
serializer = view.get_serializer()
# Render the raw data content
renderer = renderer_class()
accepted = self.accepted_media_type
context = self.renderer_context.copy()
context['indent'] = 4
# strip HiddenField from output
is_list_serializer = isinstance(serializer, serializers.ListSerializer)
serializer = serializer.child if is_list_serializer else serializer
data = serializer.data.copy()
for name, field in serializer.fields.items():
if isinstance(field, serializers.HiddenField):
data.pop(name, None)
data = [data] if is_list_serializer else data
content = renderer.render(data, accepted, context)
# Renders returns bytes, but CharField expects a str.
content = content.decode()
else:
content = None
# Generate a generic form that includes a content type field,
# and a content field.
media_types = [parser.media_type for parser in view.parser_classes]
choices = [(media_type, media_type) for media_type in media_types]
initial = media_types[0]
class GenericContentForm(forms.Form):
_content_type = forms.ChoiceField(
label='Media type',
choices=choices,
initial=initial,
widget=forms.Select(attrs={'data-override': 'content-type'})
)
_content = forms.CharField(
label='Content',
widget=forms.Textarea(attrs={'data-override': 'content'}),
initial=content,
required=False
)
return GenericContentForm()
def get_name(self, view):
return view.get_view_name()
def get_description(self, view, status_code):
if status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN):
return ''
return view.get_view_description(html=True)
def get_breadcrumbs(self, request):
return get_breadcrumbs(request.path, request)
def get_extra_actions(self, view, status_code):
if (status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN)):
return None
elif not hasattr(view, 'get_extra_action_url_map'):
return None
return view.get_extra_action_url_map()
def get_filter_form(self, data, view, request):
if not hasattr(view, 'get_queryset') or not hasattr(view, 'filter_backends'):
return
# Infer if this is a list view or not.
paginator = getattr(view, 'paginator', None)
if isinstance(data, list):
pass
elif paginator is not None and data is not None:
try:
paginator.get_results(data)
except (TypeError, KeyError):
return
elif not isinstance(data, list):
return
queryset = view.get_queryset()
elements = []
for backend in view.filter_backends:
if hasattr(backend, 'to_html'):
html = backend().to_html(request, queryset, view)
if html:
elements.append(html)
if not elements:
return
template = loader.get_template(self.filter_template)
context = {'elements': elements}
return template.render(context)
def get_context(self, data, accepted_media_type, renderer_context):
"""
Returns the context used to render.
"""
view = renderer_context['view']
request = renderer_context['request']
response = renderer_context['response']
renderer = self.get_default_renderer(view)
raw_data_post_form = self.get_raw_data_form(data, view, 'POST', request)
raw_data_put_form = self.get_raw_data_form(data, view, 'PUT', request)
raw_data_patch_form = self.get_raw_data_form(data, view, 'PATCH', request)
raw_data_put_or_patch_form = raw_data_put_form or raw_data_patch_form
response_headers = dict(sorted(response.items()))
renderer_content_type = ''
if renderer:
renderer_content_type = '%s' % renderer.media_type
if renderer.charset:
renderer_content_type += ' ;%s' % renderer.charset
response_headers['Content-Type'] = renderer_content_type
if getattr(view, 'paginator', None) and view.paginator.display_page_controls:
paginator = view.paginator
else:
paginator = None
csrf_cookie_name = settings.CSRF_COOKIE_NAME
csrf_header_name = settings.CSRF_HEADER_NAME
if csrf_header_name.startswith('HTTP_'):
csrf_header_name = csrf_header_name[5:]
csrf_header_name = csrf_header_name.replace('_', '-')
return {
'content': self.get_content(renderer, data, accepted_media_type, renderer_context),
'code_style': pygments_css(self.code_style),
'view': view,
'request': request,
'response': response,
'user': request.user,
'description': self.get_description(view, response.status_code),
'name': self.get_name(view),
'version': VERSION,
'paginator': paginator,
'breadcrumblist': self.get_breadcrumbs(request),
'allowed_methods': view.allowed_methods,
'available_formats': [renderer_cls.format for renderer_cls in view.renderer_classes],
'response_headers': response_headers,
'put_form': self.get_rendered_html_form(data, view, 'PUT', request),
'post_form': self.get_rendered_html_form(data, view, 'POST', request),
'delete_form': self.get_rendered_html_form(data, view, 'DELETE', request),
'options_form': self.get_rendered_html_form(data, view, 'OPTIONS', request),
'extra_actions': self.get_extra_actions(view, response.status_code),
'filter_form': self.get_filter_form(data, view, request),
'raw_data_put_form': raw_data_put_form,
'raw_data_post_form': raw_data_post_form,
'raw_data_patch_form': raw_data_patch_form,
'raw_data_put_or_patch_form': raw_data_put_or_patch_form,
'display_edit_forms': bool(response.status_code != 403),
'api_settings': api_settings,
'csrf_cookie_name': csrf_cookie_name,
'csrf_header_name': csrf_header_name
}
def render(self, data, accepted_media_type=None, renderer_context=None):
"""
Render the HTML for the browsable API representation.
"""
self.accepted_media_type = accepted_media_type or ''
self.renderer_context = renderer_context or {}
template = loader.get_template(self.template)
context = self.get_context(data, accepted_media_type, renderer_context)
ret = template.render(context, request=renderer_context['request'])
# Munge DELETE Response code to allow us to return content
# (Do this *after* we've rendered the template so that we include
# the normal deletion response code in the output)
response = renderer_context['response']
if response.status_code == status.HTTP_204_NO_CONTENT:
response.status_code = status.HTTP_200_OK
return ret
class AdminRenderer(BrowsableAPIRenderer):
template = 'rest_framework/admin.html'
format = 'admin'
def render(self, data, accepted_media_type=None, renderer_context=None):
self.accepted_media_type = accepted_media_type or ''
self.renderer_context = renderer_context or {}
response = renderer_context['response']
request = renderer_context['request']
view = self.renderer_context['view']
if response.status_code == status.HTTP_400_BAD_REQUEST:
# Errors still need to display the list or detail information.
# The only way we can get at that is to simulate a GET request.
self.error_form = self.get_rendered_html_form(data, view, request.method, request)
self.error_title = {'POST': 'Create', 'PUT': 'Edit'}.get(request.method, 'Errors')
with override_method(view, request, 'GET') as request:
response = view.get(request, *view.args, **view.kwargs)
data = response.data
template = loader.get_template(self.template)
context = self.get_context(data, accepted_media_type, renderer_context)
ret = template.render(context, request=renderer_context['request'])
# Creation and deletion should use redirects in the admin style.
if response.status_code == status.HTTP_201_CREATED and 'Location' in response:
response.status_code = status.HTTP_303_SEE_OTHER
response['Location'] = request.build_absolute_uri()
ret = ''
if response.status_code == status.HTTP_204_NO_CONTENT:
response.status_code = status.HTTP_303_SEE_OTHER
try:
# Attempt to get the parent breadcrumb URL.
response['Location'] = self.get_breadcrumbs(request)[-2][1]
except KeyError:
# Otherwise reload current URL to get a 'Not Found' page.
response['Location'] = request.full_path
ret = ''
return ret
def get_context(self, data, accepted_media_type, renderer_context):
"""
Render the HTML for the browsable API representation.
"""
context = super().get_context(
data, accepted_media_type, renderer_context
)
paginator = getattr(context['view'], 'paginator', None)
if paginator is not None and data is not None:
try:
results = paginator.get_results(data)
except (TypeError, KeyError):
results = data
else:
results = data
if results is None:
header = {}
style = 'detail'
elif isinstance(results, list):
header = results[0] if results else {}
style = 'list'
else:
header = results
style = 'detail'
columns = [key for key in header if key != 'url']
details = [key for key in header if key != 'url']
if isinstance(results, list) and 'view' in renderer_context:
for result in results:
url = self.get_result_url(result, context['view'])
if url is not None:
result.setdefault('url', url)
context['style'] = style
context['columns'] = columns
context['details'] = details
context['results'] = results
context['error_form'] = getattr(self, 'error_form', None)
context['error_title'] = getattr(self, 'error_title', None)
return context
def get_result_url(self, result, view):
"""
Attempt to reverse the result's detail view URL.
This only works with views that are generic-like (has `.lookup_field`)
and viewset-like (has `.basename` / `.reverse_action()`).
"""
if not hasattr(view, 'reverse_action') or \
not hasattr(view, 'lookup_field'):
return
lookup_field = view.lookup_field
lookup_url_kwarg = getattr(view, 'lookup_url_kwarg', None) or lookup_field
try:
kwargs = {lookup_url_kwarg: result[lookup_field]}
return view.reverse_action('detail', kwargs=kwargs)
except (KeyError, NoReverseMatch):
return
class DocumentationRenderer(BaseRenderer):
media_type = 'text/html'
format = 'html'
charset = 'utf-8'
template = 'rest_framework/docs/index.html'
error_template = 'rest_framework/docs/error.html'
code_style = 'emacs'
languages = ['shell', 'javascript', 'python']
def get_context(self, data, request):
return {
'document': data,
'langs': self.languages,
'lang_htmls': ["rest_framework/docs/langs/%s.html" % language for language in self.languages],
'lang_intro_htmls': ["rest_framework/docs/langs/%s-intro.html" % language for language in self.languages],
'code_style': pygments_css(self.code_style),
'request': request
}
def render(self, data, accepted_media_type=None, renderer_context=None):
if isinstance(data, coreapi.Document):
template = loader.get_template(self.template)
context = self.get_context(data, renderer_context['request'])
return template.render(context, request=renderer_context['request'])
else:
template = loader.get_template(self.error_template)
context = {
"data": data,
"request": renderer_context['request'],
"response": renderer_context['response'],
"debug": settings.DEBUG,
}
return template.render(context, request=renderer_context['request'])
class SchemaJSRenderer(BaseRenderer):
media_type = 'application/javascript'
format = 'javascript'
charset = 'utf-8'
template = 'rest_framework/schema.js'
def render(self, data, accepted_media_type=None, renderer_context=None):
codec = coreapi.codecs.CoreJSONCodec()
schema = base64.b64encode(codec.encode(data)).decode('ascii')
template = loader.get_template(self.template)
context = {'schema': mark_safe(schema)}
request = renderer_context['request']
return template.render(context, request=request)
class MultiPartRenderer(BaseRenderer):
media_type = 'multipart/form-data; boundary=BoUnDaRyStRiNg'
format = 'multipart'
charset = 'utf-8'
BOUNDARY = 'BoUnDaRyStRiNg'
def render(self, data, accepted_media_type=None, renderer_context=None):
from django.test.client import encode_multipart
if hasattr(data, 'items'):
for key, value in data.items():
assert not isinstance(value, dict), (
"Test data contained a dictionary value for key '%s', "
"but multipart uploads do not support nested data. "
"You may want to consider using format='json' in this "
"test case." % key
)
return encode_multipart(self.BOUNDARY, data)
class CoreJSONRenderer(BaseRenderer):
media_type = 'application/coreapi+json'
charset = None
format = 'corejson'
def __init__(self):
assert coreapi, 'Using CoreJSONRenderer, but `coreapi` is not installed.'
def render(self, data, media_type=None, renderer_context=None):
indent = bool(renderer_context.get('indent', 0))
codec = coreapi.codecs.CoreJSONCodec()
return codec.dump(data, indent=indent)
class _BaseOpenAPIRenderer:
def get_schema(self, instance):
CLASS_TO_TYPENAME = {
coreschema.Object: 'object',
coreschema.Array: 'array',
coreschema.Number: 'number',
coreschema.Integer: 'integer',
coreschema.String: 'string',
coreschema.Boolean: 'boolean',
}
schema = {}
if instance.__class__ in CLASS_TO_TYPENAME:
schema['type'] = CLASS_TO_TYPENAME[instance.__class__]
schema['title'] = instance.title
schema['description'] = instance.description
if hasattr(instance, 'enum'):
schema['enum'] = instance.enum
return schema
def get_parameters(self, link):
parameters = []
for field in link.fields:
if field.location not in ['path', 'query']:
continue
parameter = {
'name': field.name,
'in': field.location,
}
if field.required:
parameter['required'] = True
if field.description:
parameter['description'] = field.description
if field.schema:
parameter['schema'] = self.get_schema(field.schema)
parameters.append(parameter)
return parameters
def get_operation(self, link, name, tag):
operation_id = "%s_%s" % (tag, name) if tag else name
parameters = self.get_parameters(link)
operation = {
'operationId': operation_id,
}
if link.title:
operation['summary'] = link.title
if link.description:
operation['description'] = link.description
if parameters:
operation['parameters'] = parameters
if tag:
operation['tags'] = [tag]
return operation
def get_paths(self, document):
paths = {}
tag = None
for name, link in document.links.items():
path = parse.urlparse(link.url).path
method = link.action.lower()
paths.setdefault(path, {})
paths[path][method] = self.get_operation(link, name, tag=tag)
for tag, section in document.data.items():
for name, link in section.links.items():
path = parse.urlparse(link.url).path
method = link.action.lower()
paths.setdefault(path, {})
paths[path][method] = self.get_operation(link, name, tag=tag)
return paths
def get_structure(self, data):
return {
'openapi': '3.0.0',
'info': {
'version': '',
'title': data.title,
'description': data.description
},
'servers': [{
'url': data.url
}],
'paths': self.get_paths(data)
}
class CoreAPIOpenAPIRenderer(_BaseOpenAPIRenderer):
media_type = 'application/vnd.oai.openapi'
charset = None
format = 'openapi'
def __init__(self):
assert coreapi, 'Using CoreAPIOpenAPIRenderer, but `coreapi` is not installed.'
assert yaml, 'Using CoreAPIOpenAPIRenderer, but `pyyaml` is not installed.'
def render(self, data, media_type=None, renderer_context=None):
structure = self.get_structure(data)
return yaml.dump(structure, default_flow_style=False).encode()
class CoreAPIJSONOpenAPIRenderer(_BaseOpenAPIRenderer):
media_type = 'application/vnd.oai.openapi+json'
charset = None
format = 'openapi-json'
ensure_ascii = not api_settings.UNICODE_JSON
def __init__(self):
assert coreapi, 'Using CoreAPIJSONOpenAPIRenderer, but `coreapi` is not installed.'
def render(self, data, media_type=None, renderer_context=None):
structure = self.get_structure(data)
return json.dumps(
structure, indent=4,
ensure_ascii=self.ensure_ascii).encode('utf-8')
class OpenAPIRenderer(BaseRenderer):
media_type = 'application/vnd.oai.openapi'
charset = None
format = 'openapi'
def __init__(self):
assert yaml, 'Using OpenAPIRenderer, but `pyyaml` is not installed.'
def render(self, data, media_type=None, renderer_context=None):
# disable yaml advanced feature 'alias' for clean, portable, and readable output
class Dumper(yaml.Dumper):
def ignore_aliases(self, data):
return True
Dumper.add_representer(SafeString, Dumper.represent_str)
return yaml.dump(data, default_flow_style=False, sort_keys=False, Dumper=Dumper).encode('utf-8')
class JSONOpenAPIRenderer(BaseRenderer):
media_type = 'application/vnd.oai.openapi+json'
charset = None
encoder_class = encoders.JSONEncoder
format = 'openapi-json'
ensure_ascii = not api_settings.UNICODE_JSON
def render(self, data, media_type=None, renderer_context=None):
return json.dumps(
data, cls=self.encoder_class, indent=2,
ensure_ascii=self.ensure_ascii).encode('utf-8')