2015-02-23 23:17:23 +00:00
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# -*- coding: utf-8 -*-
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import os
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import json
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import clastic
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from clastic import Application
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from clastic.render import JSONRender
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from clastic.middleware import GetParamMiddleware
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from clastic import Response
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from clastic.sinter import getargspec
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2015-04-10 03:56:42 +00:00
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from boltons.tableutils import Table
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2015-02-23 23:17:23 +00:00
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_DATA = json.load(open('meta_stats.json'))
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_CUR_PATH = os.path.dirname(os.path.abspath(clastic.__file__))
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_CA_PATH = _CUR_PATH + '/_clastic_assets'
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_CSS_PATH = _CA_PATH + '/common.css'
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_STYLE = open(_CSS_PATH).read()
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def fetch_json(url):
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import urllib2
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response = urllib2.urlopen(url)
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content = response.read()
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data = json.loads(content)
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return data
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class AutoTableRenderer(object):
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_html_doctype = '<!doctype html>'
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_html_wrapper, _html_wrapper_close = '<html>', '</html>'
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_html_table_tag = '<table class="clastic-atr-table">'
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_html_style_content = _STYLE
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def __init__(self, max_depth=4, orientation='auto'):
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self.max_depth = max_depth
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self.orientation = orientation
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def _html_format_ep(self, route):
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# TODO: callable object endpoints?
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module_name = route.endpoint.__module__
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try:
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func_name = route.endpoint.func_name
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except:
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func_name = repr(route.endpoint)
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args, _, _, _ = getargspec(route.endpoint)
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argstr = ', '.join(args)
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title = ('<h2><small><sub>%s</sub></small><br/>%s(%s)</h2>'
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% (module_name, func_name, argstr))
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return title
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def __call__(self, context, _route):
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content_parts = [self._html_wrapper]
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if self._html_style_content:
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content_parts.extend(['<head><style type="text/css">',
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self._html_style_content,
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'</style></head>'])
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content_parts.append('<body>')
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title = self._html_format_ep(_route)
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content_parts.append(title)
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table = Table.from_data(context, max_depth=self.max_depth)
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table._html_table_tag = self._html_table_tag
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content = table.to_html(max_depth=self.max_depth,
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orientation=self.orientation)
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content_parts.append(content)
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content_parts.append('</body>')
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content_parts.append(self._html_wrapper_close)
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return Response('\n'.join(content_parts), mimetype='text/html')
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class BasicRender(object):
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_default_mime = 'application/json'
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_format_mime_map = {'html': 'text/html',
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'json': 'application/json'}
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def __init__(self, dev_mode=True, qp_name='format'):
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self.qp_name = qp_name
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self.json_render = JSONRender(dev_mode=dev_mode)
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self.autotable_render = AutoTableRenderer()
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def render_response(self, request, context, _route):
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from collections import Sized
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if isinstance(context, basestring): # already serialized
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if self._guess_json(context):
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return Response(context, mimetype="application/json")
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elif '<html' in context[:168]:
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# based on the longest DOCTYPE I found in a brief search
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return Response(context, mimetype="text/html")
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else:
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return Response(context, mimetype="text/plain")
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# not serialized yet, time to guess what the requester wants
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if not isinstance(context, Sized):
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return Response(unicode(context), mimetype="text/plain")
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return self._serialize_to_resp(context, request, _route)
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__call__ = render_response
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def _serialize_to_resp(self, context, request, _route):
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req_format = request.args.get(self.qp_name) # explicit GET query param
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if req_format and req_format not in self._format_mime_map:
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# TODO: badrequest
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raise ValueError('format expected one of %r, not %r'
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% (self.formats, req_format))
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resp_mime = self._format_mime_map.get(req_format)
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if not resp_mime and request.accept_mimetypes:
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resp_mime = request.accept_mimetypes.best_match(self.mimetypes)
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if resp_mime not in self._mime_format_map:
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resp_mime = self._default_mime
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if resp_mime == 'application/json':
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return self.json_render(context)
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elif resp_mime == 'text/html':
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return self.autotable_render(context, _route)
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return Response(unicode(context), mimetype="text/plain")
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@property
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def _mime_format_map(self):
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return dict([(v, k) for k, v in self._format_mime_map.items()])
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@property
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def formats(self):
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return self._format_mime_map.keys()
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@property
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def mimetypes(self):
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return self._format_mime_map.values()
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@staticmethod
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def _guess_json(text):
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if not text:
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return False
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elif text[0] == '{' and text[-1] == '}':
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return True
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elif text[0] == '[' and text[-1] == ']':
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return True
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else:
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return False
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@classmethod
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def factory(cls, *a, **kw):
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def basic_render_factory(render_arg):
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# behavior doesn't change depending on render_arg
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return cls(*a, **kw)
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return basic_render_factory
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def ident_ep(data):
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return data
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def main():
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rsc = {'data': _DATA}
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gpm = GetParamMiddleware('url')
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atr = AutoTableRenderer(max_depth=5)
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render_basic = BasicRender()
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app = Application([('/', ident_ep, render_basic),
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('/json', ident_ep, render_basic),
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('/fetch', fetch_json, render_basic)], rsc, [gpm])
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app.serve()
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if __name__ == '__main__':
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main()
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