#
# encoding: UTF-8
# api: streamtuner2
# type: class
# title: global config object
# description: reads ~/.config/streamtuner/*.json files
# config: {type:var, name:z, description:v}
#
# In the main application or module files which need access
# to a global conf.* object, just import this module as follows:
#
# from config import *
#
# Here conf is already an instantiation of the underlying
# ConfigDoct class.
#
# Also provides the logging function __print__, and basic
# plugin handling code: plugin_meta() and module_list(),
# and the relative get_data() alias (files from pyzip/path).
#
import os
import sys
import json
import gzip
import platform
import re
from compat2and3 import gzip_decode, find_executable
import zlib
import zipfile
import inspect
import pkgutil
# export symbols
__all__ = ["conf", "__print__", "dbg", "plugin_meta", "module_list", "get_data", "find_executable"]
#-- create a stub instance of config object
conf = object()
# separate instance of netrc, if needed
netrc = None
# Global configuration store
#
# Autointializes itself on startup, makes conf.vars available.
# Also provides .load() and .save() for JSON data/cache files.
#
class ConfigDict(dict):
# start
def __init__(self):
# object==dict means conf.var is conf["var"]
self.__dict__ = self # let's pray this won't leak memory due to recursion issues
# prepare
self.defaults()
self.xdg()
# runtime
self.share = os.path.dirname(os.path.abspath(__file__))
# settings from last session
last = self.load("settings")
if (last):
if "share" in last:
del last["share"]
self.update(last)
self.migrate()
# store defaults in file
else:
self.save("settings")
self.firstrun = 1
# some defaults
def defaults(self):
self.play = {
"audio/mpeg": self.find_player(),
"audio/ogg": self.find_player(),
"audio/*": self.find_player(),
"video/youtube": self.find_player(typ="video") + " $(youtube-dl -g %srv)",
"video/*": self.find_player(typ="video", default="vlc"),
"url/http": self.find_player(typ="browser"),
}
self.record = {
"audio/*": self.find_player(typ="xterm") + " -e streamripper %srv", # -d /home/***USERNAME***/Musik
"video/youtube": self.find_player(typ="xterm") + " -e \"youtube-dl %srv\"",
}
# Presets are redundant now. On first startup the `priority:` field of each plugin is checked.
self.plugins = {
# core plugins, cannot be disabled anyway
"bookmarks": 1,
"search": 1,
"streamedit": 1,
"configwin": 1,
}
self.tmp = os.environ.get("TEMP", "/tmp")
self.max_streams = "500"
self.show_bookmarks = 1
self.show_favicons = 1
self.load_favicon = 1
self.heuristic_bookmark_update = 0
self.retain_deleted = 0
self.auto_save_appstate = 1
self.reuse_m3u = 1
self.google_homepage = 0
self.windows = platform.system()=="Windows"
self.pyquery = 1
self.debug = 0
# each plugin has a .config dict list, we add defaults here
def add_plugin_defaults(self, meta, module=""):
# options
config = meta.get("config", [])
for opt in config:
if ("name" in opt) and ("value" in opt) and (opt["name"] not in vars(self)):
self.__dict__[opt["name"]] = opt["value"]
# plugin state
if module and module not in conf.plugins:
conf.plugins[module] = meta.get("priority") in ("core", "builtin", "always", "default", "standard")
# look at system binaries for standard audio players
def find_player(self, typ="audio", default="xdg-open"):
players = {
"audio": ["audacious %g", "audacious2", "exaile %p", "xmms2", "banshee", "amarok %g", "clementine", "qmmp", "quodlibet", "aqualung", "mp3blaster %g", "vlc --one-instance %srv", "totem"],
"video": ["parole", "umplayer", "xnoise", "gxine", "totem", "vlc --one-instance", "smplayer", "gnome-media-player", "xine", "bangarang"],
"browser": ["opera", "midori", "sensible-browser"],
"xterm": ["xfce4-terminal", "x-termina-emulator", "gnome-terminal", "xterm", "rxvt"],
}
for bin in players[typ]:
if find_executable(bin.split()[0]):
return bin
return default
# http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
def xdg(self, path="/streamtuner2"):
home = os.environ.get("HOME", self.tmp)
config = os.environ.get("XDG_CONFIG_HOME", os.environ.get("APPDATA", home+"/.config"))
# storage dir
self.dir = config + path
# create if necessary
if (not os.path.exists(self.dir)):
os.makedirs(self.dir)
# store some configuration list/dict into a file
def save(self, name="settings", data=None, gz=0, nice=0):
name = name + ".json"
if (data is None):
data = dict(self.__dict__) # ANOTHER WORKAROUND: typecast to plain dict(), else json filter_data sees it as object and str()s it
nice = 1
# check for subdir
if (name.find("/") > 0):
subdir = name[0:name.find("/")]
subdir = self.dir + "/" + subdir
if (not os.path.exists(subdir)):
os.mkdir(subdir)
open(subdir+"/.nobackup", "w").close()
# write
file = self.dir + "/" + name
# .gz or normal file
if gz:
f = gzip.open(file+".gz", "w")
if os.path.exists(file):
os.unlink(file)
else:
f = open(file, "w")
# encode
data = json.dumps(data, indent=(4 if nice else None))
try:
f.write(data.encode("utf-8"))
except TypeError as e:
f.write(data) # Python3 sometimes wants to write strings rather than bytes
f.close()
# retrieve data from config file
def load(self, name):
name = name + ".json"
file = self.dir + "/" + name
try:
# .gz or normal file
if os.path.exists(file + ".gz"):
f = gzip.open(file + ".gz", "rt")
elif os.path.exists(file):
f = open(file, "rt")
else:
return # file not found
# decode
r = json.load(f)
f.close()
return r
except Exception as e:
__print__(dbg.ERR, "JSON parsing error (in "+name+")", e)
# recursive dict update
def update(self, with_new_data):
for key,value in with_new_data.items():
if type(value) == dict:
self[key].update(value)
else:
self[key] = value
# descends into sub-dicts instead of wiping them with subkeys
# update old setting names
def migrate(self):
# 2.1.1
if "audio/mp3" in self.play:
self.play["audio/mpeg"] = self.play["audio/mp3"]
del self.play["audio/mp3"]
# check for existing filename in directory list
def find_in_dirs(self, dirs, file):
for d in dirs:
if os.path.exists(d+"/"+file):
return d+"/"+file
# standard user account storage in ~/.netrc or less standard but contemporarily in ~/.config/netrc
def netrc(self, varhosts=("shoutcast.com")):
global netrc
if not netrc:
netrc = {}
try:
from netrc import netrc as parser
try:
netrc = parser().hosts
except:
netrc = parser(self.xdg() + "/netrc").hosts
except:
pass
for server in varhosts:
if server in netrc:
return netrc[server]
# Retrieve content from install path or pyzip archive (alias for pkgutil.get_data)
#
def get_data(fn, decode=False, gz=False, file_base="config"):
try:
bin = pkgutil.get_data(file_base, fn)
if gz:
bin = gzip_decode(bin)
if decode:
return bin.decode("utf-8")
else:
return str(bin)
except:
pass
# Search through ./channels/ and get module basenames.
# (Reordering channel tabs is now done by uikit.apply_state.)
#
def module_list(plugin_base="channels"):
# Should list plugins within zips as well as local paths
ls = pkgutil.iter_modules([plugin_base, conf.share+"/"+plugin_base, conf.dir+"/plugins"])
return [name for loader,name,ispkg in ls]
# Plugin meta data extraction
#
# Extremely crude version for Python and streamtuner2 plugin usage.
# But can fetch from different sources:
# · fn= to read from literal files, out of a .pyzip package
# · src= to extract from pre-read script code
# · module= utilizes pkgutil to read
# · frame= automatically extract comment header from caller
#
def plugin_meta(fn=None, src=None, module=None, frame=1, plugin_base="channels"):
# try via pkgutil first
if module:
fn = module
src = pkgutil.get_data(plugin_base, fn+".py")
# get source directly from caller
elif not src and not fn:
module = inspect.getmodule(sys._getframe(frame))
fn = inspect.getsourcefile(module)
src = inspect.getcomments(module)
# real filename/path
elif fn and os.path.exists(fn):
src = open(fn).read(4096)
# assume it's within a zip
elif fn:
intfn = ""
while fn and len(fn) and not os.path.exists(fn):
fn, add = os.path.split(fn)
intfn = add + "/" + intfn
if len(fn) >= 3 and intfn and zipfile.is_zipfile(fn):
src = zipfile.ZipFile(fn, "r").read(intfn.strip("/"))
if not src:
src = ""
if type(src) is not str:
src = src.decode("utf-8")
return plugin_meta_extract(src, fn)
# Actual comment extraction logic
def plugin_meta_extract(src="", fn=None, literal=False):
# defaults
meta = {
"id": os.path.splitext(os.path.basename(fn or "")),
"fn": fn,
"title": fn, "description": "no description", "config": [],
"type": "module", "api": "python", "doc": ""
}
# extract coherent comment block, split doc section
if not literal:
src = rx.comment.search(src)
if not src:
__print__(dbg.ERR, "Couldn't read source meta information", fn)
return meta
src = src.group(0)
src = rx.hash.sub("", src).strip()
# split comment block
if src.find("\n\n") > 0:
src, meta["doc"] = src.split("\n\n", 1)
# key:value fields into dict
for field in rx.keyval.findall(src):
meta[field[0]] = field[1].strip()
meta["config"] = plugin_meta_config(meta.get("config") or "")
return meta
# Unpack config: structures
def plugin_meta_config(str):
config = []
for entry in rx.config.findall(str):
opt = { "type": None, "name": None, "description": "", "value": None }
for field in rx.options.findall(entry):
opt[field[0]] = (field[1] or field[2] or field[3] or "").strip()
config.append(opt)
return config
# Comment extraction regexps
class rx:
comment = re.compile(r"""(^ {0,4}#.*\n)+""", re.M)
hash = re.compile(r"""(^ {0,4}# *)""", re.M)
keyval = re.compile(r"""
^([\w-]+):(.*$(?:\n(?![\w-]+:).+$)*) # plain key:value lines
""", re.M|re.X)
config = re.compile(r"""
[\{\<] (.+?) [\}\>] # JSOL/YAML scheme {...} dicts
""", re.X)
options = re.compile(r"""
["':$]? (\w*) ["']? # key or ":key" or '$key'
\s* [:=] \s* # "=" or ":"
(?: " ([^"]*) "
| ' ([^']*) ' # "quoted" or 'singl' values
| ([^,]*) # or unquoted literals
)
""", re.X)
# wrapper for all print statements
def __print__(*args):
if "debug" in conf and conf.debug or args[0] == dbg.ERR:
print(" ".join([str(a) for a in args]))
# error colorization
dbg = type('obj', (object,), {
"ERR": r"[31m[ERR][0m", # red ERROR
"INIT": r"[31m[INIT][0m", # red INIT ERROR
"PROC": r"[32m[PROC][0m", # green PROCESS
"CONF": r"[33m[CONF][0m", # brown CONFIG DATA
"UI": r"[34m[UI][0m", # blue USER INTERFACE BEHAVIOUR
"HTTP": r"[35m[HTTP][0m", # magenta HTTP REQUEST
"DATA": r"[36m[DATA][0m", # cyan DATA
"INFO": r"[37m[INFO][0m", # gray INFO
"STAT": r"[37m[STATE][0m", # gray CONFIG STATE
})
#-- populate global conf instance
conf = ConfigDict()
__print__(dbg.PROC, "ConfigDict() initialized")