http.py
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# Copyright 2017, 2018 Max H. Parke KA1RBI
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#
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# This file is part of OP25
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#
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# OP25 is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# OP25 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with OP25; see the file COPYING. If not, write to the Free
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# Software Foundation, Inc., 51 Franklin Street, Boston, MA
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# 02110-1301, USA.
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import sys
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import os
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import time
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import re
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import json
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import socket
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import traceback
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from gnuradio import gr
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from waitress.server import create_server
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my_input_q = None
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my_output_q = None
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my_port = None
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"""
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fake http and ajax server module
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TODO: make less fake
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"""
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def static_file(environ, start_response):
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content_types = { 'png': 'image/png', 'jpeg': 'image/jpeg', 'jpg': 'image/jpeg', 'gif': 'image/gif', 'css': 'text/css', 'js': 'application/javascript', 'html': 'text/html'}
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img_types = 'png jpg jpeg gif'.split()
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if environ['PATH_INFO'] == '/':
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filename = 'index.html'
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else:
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filename = re.sub(r'[^a-zA-Z0-9_.\-]', '', environ['PATH_INFO'])
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suf = filename.split('.')[-1]
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pathname = '../www/www-static'
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if suf in img_types:
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pathname = '../www/images'
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pathname = '%s/%s' % (pathname, filename)
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if suf not in content_types.keys() or '..' in filename or not os.access(pathname, os.R_OK):
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sys.stderr.write('404 %s\n' % pathname)
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status = '404 NOT FOUND'
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content_type = 'text/plain'
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output = status
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else:
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output = open(pathname).read()
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content_type = content_types[suf]
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status = '200 OK'
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return status, content_type, output
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def post_req(environ, start_response, postdata):
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global my_input_q, my_output_q, my_port
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try:
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data = json.loads(postdata)
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msg = gr.message().make_from_string(str(data['command']), -2, data['data'], 0)
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my_output_q.insert_tail(msg)
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time.sleep(0.2)
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except:
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sys.stderr.write('post_req: error processing input: %s:\n' % (postdata))
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traceback.print_exc(limit=None, file=sys.stderr)
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sys.stderr.write('*** end traceback ***\n')
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resp_msg = []
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while not my_input_q.empty_p():
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msg = my_input_q.delete_head()
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if msg.type() == -4:
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resp_msg.append(json.loads(msg.to_string()))
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status = '200 OK'
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content_type = 'application/json'
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output = json.dumps(resp_msg)
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return status, content_type, output
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def http_request(environ, start_response):
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if environ['REQUEST_METHOD'] == 'GET':
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status, content_type, output = static_file(environ, start_response)
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elif environ['REQUEST_METHOD'] == 'POST':
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postdata = environ['wsgi.input'].read()
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status, content_type, output = post_req(environ, start_response, postdata)
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else:
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status = '200 OK'
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content_type = 'text/plain'
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output = status
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sys.stderr.write('http_request: unexpected input %s\n' % environ['PATH_INFO'])
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response_headers = [('Content-type', content_type),
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('Content-Length', str(len(output)))]
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start_response(status, response_headers)
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return [output]
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def application(environ, start_response):
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failed = False
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try:
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result = http_request(environ, start_response)
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except:
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failed = True
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sys.stderr.write('application: request failed:\n%s\n' % traceback.format_exc())
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sys.exit(1)
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return result
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class http_server(object):
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def __init__(self, input_q, output_q, endpoint, **kwds):
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global my_input_q, my_output_q, my_port
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host, port = endpoint.split(':')
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if my_port is not None:
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raise AssertionError('this server is already active on port %s' % my_port)
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my_input_q = input_q
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my_output_q = output_q
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my_port = int(port)
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self.server = create_server(application, host=host, port=my_port)
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def run(self):
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self.server.run()
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