monkey/chaos_monkey/transport/http.py

139 lines
4.3 KiB
Python

import urllib, BaseHTTPServer, threading, os.path
import shutil
import struct
import monkeyfs
from logging import getLogger
__author__ = 'hoffer'
LOG = getLogger(__name__)
class FileServHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
protocol_version = "HTTP/1.1"
filename = ""
def version_string(self):
return "Microsoft-IIS/7.5."
@staticmethod
def report_download():
pass
def do_POST (self):
self.send_error (501, "Unsupported method (POST)")
return
def do_GET(self):
"""Serve a GET request."""
f, start_range, end_range = self.send_head()
if f:
f.seek(start_range, 0)
chunk = 0x1000
total = 0
while chunk > 0:
if start_range + chunk > end_range:
chunk = end_range - start_range
try:
self.wfile.write(f.read(chunk))
except:
break
total += chunk
start_range += chunk
if f.tell() == monkeyfs.getsize(self.filename):
self.report_download()
f.close()
def do_HEAD(self):
"""Serve a HEAD request."""
f, start_range, end_range = self.send_head()
if f:
f.close()
def send_head(self):
if self.path != '/'+urllib.quote(os.path.basename(self.filename)):
self.send_error (500, "")
return
f = None
try:
f = monkeyfs.open(self.filename, 'rb')
except IOError:
self.send_error(404, "File not found")
return (None, 0, 0)
size = monkeyfs.getsize(self.filename)
start_range = 0
end_range = size
if "Range" in self.headers:
s, e = self.headers['range'][6:].split('-', 1)
sl = len(s)
el = len(e)
if sl > 0:
start_range = int(s)
if el > 0:
end_range = int(e) + 1
elif el > 0:
ei = int(e)
if ei < size:
start_range = size - ei
if start_range == 0 and end_range - start_range >= size:
self.send_response(200)
else:
self.send_response(206)
else:
self.send_response(200)
self.send_header("Content-type", "application/octet-stream")
self.send_header("Content-Range", 'bytes ' + str(start_range) + '-' + str(end_range - 1) + '/' + str(size))
self.send_header("Content-Length", min(end_range - start_range, size))
self.end_headers()
return (f, start_range, end_range)
def log_message(self, format, *args):
LOG.debug("FileServHTTPRequestHandler: %s - - [%s] %s" % (self.address_string(),
self.log_date_time_string(),
format % args))
class InternalHTTPServer(BaseHTTPServer.HTTPServer):
def handle_error(self, request, client_address):
#ToDo: debug log error
# import sys
# import traceback
# print >>sys.stderr, '-'*40
# print >>sys.stderr, 'Exception happened during processing of request from', client_address
# traceback.print_exc()
# print >>sys.stderr, '-'*40
pass
class HTTPServer(threading.Thread):
def __init__(self, local_ip, local_port, filename, max_downloads=1):
self._local_ip = local_ip
self._local_port = local_port
self._filename = filename
self.max_downloads = max_downloads
self.downloads = 0
self._stopped = False
threading.Thread.__init__(self)
def run(self):
class TempHandler(FileServHTTPRequestHandler):
filename = self._filename
@staticmethod
def report_download():
self.downloads+=1
httpd = InternalHTTPServer((self._local_ip, self._local_port), TempHandler)
httpd.timeout = 0.5
while not self._stopped and self.downloads < self.max_downloads:
httpd.handle_request()
self._stopped = True
def stop(self, timeout=60):
self._stopped = True
self.join(timeout)