134 lines
4.5 KiB
Python
Executable File
134 lines
4.5 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright (c) 2013 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import cgi
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import ConfigParser
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import fileinput
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import os.path
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import sys
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import os_loganalyze.filter as osfilter
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import os_loganalyze.generator as osgen
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import os_loganalyze.util as util
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import os_loganalyze.view as osview
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def htmlify_stdin():
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out = sys.stdout
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gen = osview.HTMLView(fileinput.FileInput())
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for line in gen:
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out.write(line)
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def should_be_html(environ):
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"""Simple content negotiation.
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If the client supports content negotiation, and asks for text/html,
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we give it to them, unless they also specifically want to override
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by passing ?content-type=text/plain in the query.
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This should be able to handle the case of dumb clients defaulting to
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html, but also let devs override the text format when 35 MB html
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log files kill their browser (as per a nova-api log).
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"""
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text_override = False
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accepts_html = ('HTTP_ACCEPT' in environ and
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'text/html' in environ['HTTP_ACCEPT'])
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parameters = cgi.parse_qs(environ.get('QUERY_STRING', ''))
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if 'content-type' in parameters:
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ct = cgi.escape(parameters['content-type'][0])
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if ct == 'text/plain':
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text_override = True
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return accepts_html and not text_override
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def get_config(wsgi_config):
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config = ConfigParser.ConfigParser()
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config.read(os.path.expanduser(wsgi_config))
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return config
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def use_passthrough_view(file_headers):
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"""Determine if we need to use the passthrough filter."""
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if 'content-type' not in file_headers:
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# For legacy we'll try and format. This shouldn't occur though.
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return False
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else:
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if file_headers['content-type'] in ['text/plain', 'text/html']:
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# We want to format these files
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return False
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if file_headers['content-type'] in ['application/x-gzip',
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'application/gzip']:
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# We'll need to guess if we should render the output or offer a
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# download.
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filename = file_headers['filename']
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filename = filename[:-3] if filename[-3:] == '.gz' else filename
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if os.path.splitext(filename)[1] in ['.txt', '.html']:
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return False
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return True
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def application(environ, start_response, root_path=None,
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wsgi_config='/etc/os_loganalyze/wsgi.conf'):
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if root_path is None:
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root_path = environ.get('OS_LOGANALYZE_ROOT_PATH',
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'/srv/static/logs')
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config = get_config(wsgi_config)
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# make root path absolute in case we have a path with local components
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# specified
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root_path = os.path.abspath(root_path)
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status = '200 OK'
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try:
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file_generator = osgen.get_file_generator(environ, root_path, config)
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except osgen.UnsafePath:
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status = '400 Bad Request'
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response_headers = [('Content-type', 'text/plain')]
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start_response(status, response_headers)
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return ['Invalid file url']
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except osgen.NoSuchFile:
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status = "404 Not Found"
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response_headers = [('Content-type', 'text/plain')]
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start_response(status, response_headers)
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return ['File Not Found']
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if use_passthrough_view(file_generator.file_headers):
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view_generator = osview.PassthroughView(file_generator)
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else:
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minsev = util.parse_param(environ, 'level', default="NONE")
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limit = util.parse_param(environ, 'limit')
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flines_generator = osfilter.Filter(file_generator, minsev, limit)
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if environ.get('OS_LOGANALYZE_STRIP', None):
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flines_generator.strip_control = True
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if should_be_html(environ):
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view_generator = osview.HTMLView(flines_generator)
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else:
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view_generator = osview.TextView(flines_generator)
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start_response(status, view_generator.headers)
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return view_generator
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# for development purposes, makes it easy to test the filter output
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if __name__ == "__main__":
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htmlify_stdin()
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