#!/usr/bin/env python
#
# Copyright (C) 2017 J.F.Dockes
#
# HTTP Range code:
# Portions Copyright (C) 2009,2010 Xyne
# Portions Copyright (C) 2011 Sean Goller
# https://github.com/smgoller/rangehttpserver/blob/master/RangeHTTPServer.py
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from __future__ import print_function
import SocketServer
import BaseHTTPServer
import os
import posixpath
import urllib
import urlparse
import shutil
import mimetypes
import sys
import mutagen
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
from uprclutils import uplog,printable
__version__ = "0.1"
class RangeHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
"""Simple HTTP request handler with GET and HEAD commands.
The MIME type for files is determined by calling the .guess_type() method.
The GET and HEAD requests are identical except that the HEAD
request omits the actual contents of the file.
"""
server_version = "RangeHTTP/" + __version__
def do_GET(self):
"""Serve a GET request."""
f, start_range, end_range = self.send_head()
if f:
#uplog("do_GET: Got (%d,%d)" % (start_range,end_range))
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
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):
"""Common code for GET and HEAD commands.
This sends the response code and MIME headers.
Return value is either a file object (which has to be copied
to the outputfile by the caller unless the command was HEAD,
and must be closed by the caller under all circumstances), or
None, in which case the caller has nothing further to do.
"""
path,embedded = self.translate_path(self.path)
#uplog("HTTP: translated: embedded %s path: %s" %
# (embedded, printable(path)))
if not path or not os.path.exists(path):
self.send_error(404)
return (None, 0, 0)
if not os.path.isfile(path):
self.send_error(405)
return (None, 0, 0)
f = None
try:
if embedded:
ctype, size, f = self.embedded_open(path)
fs = os.stat(path)
#uplog("embedded, got ctype %s size %s" %(ctype, size))
else:
ctype = self.guess_type(path)
f = open(path, 'rb')
fs = os.fstat(f.fileno())
size = int(fs[6])
except Exception as err:
self.send_error(404, "File not found")
return (None, 0, 0)
if "Range" in self.headers:
self.send_response(206)
else:
self.send_response(200)
self.send_header("Last-Modified", self.date_time_string(fs.st_mtime))
self.send_header("Content-type", ctype)
start_range = 0
end_range = size
self.send_header("Accept-Ranges", "bytes")
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
self.send_header("Content-Range",
'bytes ' + str(start_range) + '-' +
str(end_range - 1) + '/' + str(size))
self.send_header("Content-Length", end_range - start_range)
self.end_headers()
#uplog("Sending Bytes %d to %d" % (start_range, end_range))
return (f, start_range, end_range)
def translate_path(self, opath):
path = urllib.unquote(opath)
# pathprefix is something like /uprcl
path = path.replace(self.uprclpathprefix, '', 1)
q = urlparse.urlparse(path)
path = q.path
embedded = False
pq = urlparse.parse_qs(q.query)
if 'embed' in pq:
embedded = True
for fsp,htp in self.uprclpathmap.iteritems():
if path.startswith(fsp):
path = path.replace(fsp, htp, 1)
if embedded:
# Embedded image urls have had a .jpg or .png
# appended. Remove it to restore the track path
# name.
i = path.rfind('.')
path = path[:i]
return path, embedded
# Security feature here: never allow access to anything not in
# the path map
uplog("HTTP: translate_path: %s not found in path map" % opath)
return None, None
# Open embedded image. Returns mtype, size, f
def embedded_open(self, path):
try:
mutf = mutagen.File(path)
except Exception as err:
raise err
f = None
size = 0
if 'audio/mp3' in mutf.mime:
for tagname in mutf.iterkeys():
if tagname.startswith('APIC:'):
#self.em.rclog("mp3 img: %s" % mutf[tagname].mime)
mtype = mutf[tagname].mime
s = mutf[tagname].data
size = len(s)
f = StringIO(s)
elif 'audio/x-flac' in mutf.mime:
if mutf.pictures:
mtype = mutf.pictures[0].mime
size = len(mutf.pictures[0].data)
f = StringIO(mutf.pictures[0].data)
elif 'audio/mp4' in mutf.mime:
if 'covr' in mutf.iterkeys():
format = mutf['covr'][0].imageformat
if format == mutagen.mp4.AtomDataType.JPEG:
mtype = 'image/jpeg'
else:
mtype = 'image/png'
size = len(mutf['covr'][0])
f = StringIO(mutf['covr'][0])
if f is None:
raise Exception("can't open embedded image")
else:
return mtype, size, f
def guess_type(self, path):
"""Guess the type of a file.
Argument is a PATH (a filename).
Return value is a string of the form type/subtype,
usable for a MIME Content-type header.
The default implementation looks the file's extension
up in the table self.extensions_map, using application/octet-stream
as a default; however it would be permissible (if
slow) to look inside the data to make a better guess.
"""
base, ext = posixpath.splitext(path)
if ext in self.extensions_map:
return self.extensions_map[ext]
ext = ext.lower()
if ext in self.extensions_map:
return self.extensions_map[ext]
else:
return self.extensions_map['']
if not mimetypes.inited:
mimetypes.init() # try to read system mime.types
extensions_map = mimetypes.types_map.copy()
extensions_map.update({
'': 'application/octet-stream', # Default
'.mp4': 'video/mp4',
'.ogg': 'video/ogg',
})
class ThreadingSimpleServer(SocketServer.ThreadingMixIn,
BaseHTTPServer.HTTPServer):
# Override handle_error as the default version writes to stdout !
def handle_error(self, request, client_address):
# Actually, we generally don't care about errors...
return
uplog('-'*40)
uplog('Exception happened during processing of request from %s' %
str(client_address))
import traceback
traceback.print_exc() # XXX But this goes to stderr! (jf: yep :)
uplog('-'*40)
def runHttp(host='', port=8080, pthstr='', pathprefix=''):
lpth = pthstr.split(',')
pathmap = {}
for ptt in lpth:
l = ptt.split(':')
pathmap[l[0]] = l[1]
# Set pathmap as request handler class variable
RangeHTTPRequestHandler.uprclpathmap = pathmap
RangeHTTPRequestHandler.uprclpathprefix = pathprefix
server = ThreadingSimpleServer((host, port), RangeHTTPRequestHandler)
while 1:
server.handle_request()
if __name__ == '__main__':
if len(sys.argv) != 5:
print("Usage: uprclhttp.py <host> <port> <pthmap> <pthprefix>",
file=sys.stderr)
sys.exit(1)
runHttp(host=sys.argv[1], port = int(sys.argv[2]), pthstr=sys.argv[3],
pathprefix=sys.argv[4])