# encoding: UTF-8
# api: streamtuner2
# type: functions
# cagtegory: io
# title: play/record actions
# description: Starts audio applications, guesses MIME types for URLs
# version: 0.9
# priority: core
#
# Multimedia interface for starting audio players, recording app,
# or web browser (listed as "url/http" association in players).
# It maps audio MIME types, and extracts/converts playlist types
# (PLS, M3U, XSPF, SMIL, JSPF, ASX, raw urls).
#
# Each channel plugin has a .listtype which defines the linked
# audio playlist format. It's "pls", seldomly "m3u", or "xspf".
# Some channels list raw "srv" addresses, while Youtube "href"
# entries to Flash videos.
#
# As fallback the playlist URL is retrieved and its MIME type
# checked, and its content regexped to guess the link format.
# Lastly a playlist type suitable for audio players recreated.
# Which is somewhat of a security feature, playlists get cleaned
# up this way. The conversion is not strictly necessary for all
# players, as basic PLS is supported by most.
#
# And finally this module is also used by exporting and (perhaps
# in the future) playlist importing features.
import re
import os
from ahttp import fix_url as http_fix_url, session
from config import conf, __print__ as debug, dbg
import platform
import copy
import json
# Coupling to main window
#
main = None
# Streamlink/listformat mapping
listfmt_t = {
"audio/x-scpls": "pls",
"audio/x-mpegurl": "m3u",
"audio/mpegurl": "m3u",
"video/x-ms-asf": "asx",
"application/xspf+xml": "xspf",
"*/*": "href", # "href" for unknown responses
"url/direct": "srv",
"url/youtube": "href",
"url/http": "href",
"audio/x-pn-realaudio": "ram",
"application/smil": "smil",
"application/vnd.ms-wpl":"smil",
"audio/x-ms-wax": "asx",
"video/x-ms-asf": "asx",
"x-urn/st2-script": "script", # unused
"application/x-shockwave-flash": "href", # fallback
}
# Audio type MIME map
mediafmt_t = {
"audio/mpeg": "mp3",
"audio/ogg": "ogg",
"audio/aac" : "aac",
"audio/aacp" : "aac",
"audio/midi": "midi",
"audio/mod": "mod",
"audio/it+zip": "mod",
"audio/s3+zip": "mod",
"audio/xm+zip": "mod",
}
# Player command placeholders for playlist formats
placeholder_map = dict(
pls = "(%url | %pls | %u | %l | %r) \\b",
m3u = "(%m3u | %f | %g | %m) \\b",
xspf= "(%xspf | %xpsf | %x) \\b",
jspf= "(%jspf | %j) \\b",
asx = "(%asx) \\b",
smil= "(%smil) \\b",
srv = "(%srv | %d | %s) \\b",
)
# Playlist format content probing (assert type)
playlist_content_map = [
("pls", r""" (?i)\[playlist\].*numberofentries """),
("xspf", r""" <\?xml .* <playlist .* http://xspf\.org/ns/0/ """),
("m3u", r""" ^ \s* #(EXT)?M3U """),
("asx" , r""" <asx\b """),
("smil", r""" <smil[^>]*> .* <seq> """),
("html", r""" <(audio|video)\b[^>]+\bsrc\s*=\s*["']?https?:// """),
("wpl", r""" <\?wpl \s+ version="1\.0" \s* \?> """),
("b4s", r""" <WinampXML> """), # http://gonze.com/playlists/playlist-format-survey.html
("jspf", r""" ^ \s* \{ \s* "playlist": \s* \{ """),
("asf", r""" ^ \[Reference\] .*? ^Ref\d+= """),
("json", r""" "url": \s* "\w+:// """),
("href", r""" .* """),
]
# Exec wrapper
#
def run(cmd):
debug(dbg.PROC, "Exec:", cmd)
try: os.system("start \"%s\"" % cmd if conf.windows else cmd + " &")
except: debug(dbg.ERR, "Command not found:", cmd)
# Start web browser
#
def browser(url):
bin = conf.play.get("url/http", "sensible-browser")
run(bin + " " + quote(url))
# Open help browser, streamtuner2 pages
#
def help(*args):
run("yelp /usr/share/doc/streamtuner2/help/")
# Calls player for stream url and format
#
def play(url, audioformat="audio/mpeg", source="pls", row={}):
cmd = mime_app(audioformat, conf.play)
cmd = interpol(cmd, url, source, row)
run(cmd)
# Call streamripper
#
def record(url, audioformat="audio/mpeg", source="href", row={}):
cmd = mime_app(audioformat, conf.record)
cmd = interpol(cmd, url, source, row)
run(cmd)
# OS shell command escaping
#
def quote(ins):
if type(ins) is str:
return "%r" % str(ins)
else:
return " ".join(["%r" % str(s) for s in ins])
# Convert e.g. "text/x-scpls" MIME types to just "pls" monikers
#
def listfmt(t = "pls"):
return listfmt_t.get(t, t) # e.g. "pls" or still "text/x-unknown"
# Convert MIME type into list of ["audio/xyz", "audio/*", "*/*"]
# for comparison against configured record/play association.
def mime_app(fmt, cmd_list):
major = fmt[:fmt.find("/")]
for match in [ fmt, major + "/*", "*/*" ]:
if cmd_list.get(match):
return cmd_list[match]
# Replaces instances of %m3u, %pls, %srv in a command string.
# · Also understands short aliases %l, %f, %d.
# · And can embed %title or %genre placeholders.
# · Replace .pls URL with local .m3u file depending on map.
#
def interpol(cmd, url, source="pls", row={}):
# inject other meta fields
if row:
for field in row:
cmd = cmd.replace("%"+field, "%r" % row.get(field))
# add default if cmd has no %url placeholder
if cmd.find("%") < 0:
cmd = cmd + " %pls"
# "pls" as default requires no conversion for most channels, and seems broadly supported by players
# standard placeholders
for dest, rx in placeholder_map.items():
if re.search(rx, cmd, re.X):
# from .pls to .m3u
fn_or_urls = convert_playlist(url, listfmt(source), listfmt(dest), local_file=True, title=row.get("title", ""))
# insert quoted URL/filepath
return re.sub(rx, quote(fn_or_urls), cmd, 2, re.X)
return "false"
# Substitute .pls URL with local .m3u, or direct srv addresses, or leaves URL asis.
# · Takes a single input `url`.
# · But returns a list of [urls] after playlist extraction.
# · If repackaging as .m3u/.pls/.xspf, returns the local [fn].
#
# TODO: This still needs some rewrite to reuse the incoming row={},
# and keep station titles for converted playlists.
#
def convert_playlist(url, source, dest, local_file=True, title=""):
urls = []
debug(dbg.PROC, "convert_playlist(", url, source, dest, ")")
# Leave alone if format matches, or if "srv" URL class, or if not http (local path, mms:/rtsp:)
if source == dest or source in ("srv", "href") or not re.match("(https?|spdy)://", url):
return [url]
# Retrieve from URL
(mime, cnt) = http_probe_get(url)
# Leave streaming server as is
if mime == "srv":
cnt = ""
return [url]
# Test URL path "extension" for ".pls" / ".m3u" etc.
ext = re.findall("\.(\w)$", url)
ext = ext[0] if ext else None
# Probe MIME type and content per regex
probe = None
for probe,rx in playlist_content_map:
if re.search(rx, cnt, re.X|re.S):
probe = listfmt(probe)
break # with `probe` set
# Check ambiguity (except pseudo extension)
if len(set([source, mime, probe])) > 1:
debug(dbg.ERR, "Possible playlist format mismatch:", (source, mime, probe, ext))
# Extract URLs from content
for fmt in ["pls", "xspf", "asx", "smil", "jspf", "m3u", "json", "asf", "raw"]:
if not urls and fmt in (source, mime, probe, ext, "raw"):
urls = extract_playlist(cnt).format(fmt)
debug(dbg.DATA, "conversion from:", source, " with extractor:", fmt, "got URLs=", urls)
# Return original, or asis for srv targets
if not urls:
return [url]
elif dest in ("srv", "href"):
return urls
debug( urls )
# Otherwise convert to local file
if local_file:
fn, is_unique = tmp_fn(cnt)
with open(fn, "wb") as f:
debug(dbg.DATA, "exporting with format:", dest, " into filename:", fn)
f.write( save_playlist(source="srv", multiply=True).export(urls=urls, dest=dest, title=title) )
return [fn]
else:
return urls
# Tries to fetch a resource, aborts on ICY responses.
#
def http_probe_get(url):
# HTTP request, abort if streaming server hit (no HTTP/ header, but ICY/ response)
try:
r = session.get(url, stream=True, timeout=5.0)
if not len(r.headers):
return ("srv", r)
except:
return ("srv", None)
# Extract payload
mime = r.headers.get("content-type", "href")
# Map MIME to abbr type (pls, m3u, xspf)
if listfmt_t.get(mime):
mime = listfmt_t.get(mime)
# Raw content (mp3, flv)
elif mediafmt_t.get(mime):
debug(dbg.ERR, "Got media MIME type for expected playlist", mime, " on url=", url)
mime = mediafmt_t.get(mime)
return (mime, url)
# Rejoin body
content = "\n".join(r.iter_lines())
return (mime, content)
# Extract URLs from playlist formats:
#
class extract_playlist(object):
# Content of playlist file
src = ""
def __init__(self, text):
self.src = text
# Extract only URLs from given source type
def format(self, fmt):
debug(dbg.DATA, "input regex:", fmt, len(self.src))
return re.findall(self.extr_urls[fmt], self.src, re.X);
# Only look out for URLs, not local file paths
extr_urls = {
"pls": r"(?im) ^ \s*File\d* \s*=\s* (\w+://[^\s]+) ",
"m3u": r" (?m) ^( \w+:// [^#\n]+ )",
"xspf": r" (?x) <location> (\w+://[^<>\s]+) </location> ",
"asx": r" (?x) <ref \b[^>]+\b href \s*=\s* [\'\"] (\w+://[^\s\"\']+) [\'\"] ",
"smil": r" (?x) <(?:audio|video|media)\b [^>]+ \b src \s*=\s* [^\"\']? \s* (\w+://[^\"\'\s]+) ",
"jspf": r" (?x) \"location\" \s*:\s* \"(\w+://[^\"\s]+)\" ",
"json": r" (?x) \"url\" \s*:\s* \"(\w+://[^\"\s]+)\" ",
"asf": r" (?m) ^ \s*Ref\d+ = (\w+://[^\s]+) ",
"raw": r" (?i) ( [\w+]+:// [^\s\"\'\>\#]+ ) ",
}
# Save rows in one of the export formats.
#
# The export() version uses urls[]+title= as input, converts it into a
# list of rows{} beforehand.
#
# While store() requires rows{} to begin with, to perform a full
# conversion. Can save directly to a file name.
#
class save_playlist(object):
# if converting
source = "pls"
# expand multiple server URLs into duplicate entries in target playlist
multiply = True
# constructor
def __init__(self, source, multiply):
self.source = source
self.multiply = multiply
# Used by playlist_convert(), to transform a list of extracted URLs
# into a local .pls/.m3u collection again. Therefore injects the
# `title` back into each of the URL rows.
def export(self, urls=None, title=None, dest="pls"):
rows = [ { "url": url, "title": title } for url in urls ]
return self.store(rows, dest)
# Export a playlist from rows{}
def store(self, rows=None, dest="pls"):
# can be just a single entry
rows = copy.deepcopy(rows)
if type(rows) is dict:
rows = [row]
# Expand contained stream urls
if not self.source in ("srv", "raw", "asis"):
new_rows = []
for i,row in enumerate(rows):
# Preferrably convert to direct server addresses
for url in convert_playlist(row["url"], self.source, "srv", local_file=False):
row["url"] = url
new_rows.append(row)
# Or just allow one stream per station in a playlist entry
if not self.multiply:
break
rows = new_rows
debug(dbg.DATA, "conversion to:", dest, " from:", self.source, "with rows=", rows)
# call conversion schemes
converter = getattr(self, dest) or self.pls
return converter(rows)
# save directly
def file(self, rows, dest, fn):
with open(fn, "wb") as f:
f.write(self.store(rows, dest))
# M3U
def m3u(self, rows):
txt = "#EXTM3U\n"
for r in rows:
txt += "#EXTINF:-1,%s\n" % r["title"]
txt += "%s\n" % http_fix_url(r["url"])
return txt
# PLS
def pls(self, rows):
txt = "[playlist]\n" + "numberofentries=%s\n" % len(rows)
for i,r in enumerate(rows):
txt += "File%s=%s\nTitle%s=%s\nLength%s=%s\n" % (i, r["url"], i, r["title"], i, -1)
txt += "Version=2\n"
return txt
# JSON (native lists of streamtuner2)
def json(self, rows):
return json.dumps(rows, indent=4)
# XSPF
def xspf(self, rows):
return """<?xml version="1.0" encoding="UTF-8"?>\n""" \
+ """<?http header="Content-Type: application/xspf+xml" ?>\n""" \
+ """<playlist version="1" xmlns="http://xspf.org/ns/0/">\n\t<trackList>\n""" \
+ "".join("""\t\t<track>\n%s\t\t</track>\n""" % self.xspf_row(row, self.xspf_map) for row in rows) \
+ """\t</trackList>\n</playlist>\n"""
# individual tracks
def xspf_row(self, row, map):
return "".join("""\t\t\t<%s>%s</%s>\n""" % (tag, xmlentities(row[attr]), tag) for attr,tag in map.items() if row.get(attr))
# dict to xml tags
xspf_map = dict(title="title", url="location", homepage="info", playing="annotation", description="info")
# JSPF
def jspf(self, rows):
tracks = []
for row in rows:
tracks.append( { tag: row[attr] for attr,tag in self.xspf_map.items() if row.get(attr) } )
return json.dumps({ "playlist": { "track": tracks } }, indent=4)
# ASX
def asx(self, rows):
txt = """<asx version="3.0">\n"""
for row in rows:
txt += """\t<entry>\n\t\t<title>%s</title>\n\t\t<ref href="%s"/>\n\t</entry>\n""" % (xmlentities(row["title"]), xmlentities(row["url"]))
txt += """</asx>\n"""
return txt
# SMIL
def smil(self, rows):
txt = """<smil>\n<head>\n\t<meta name="title" content="%s""/>\n</head>\n<body>\n\t<seq>\n""" % (rows[0]["title"])
for row in rows:
if row.get("url"):
txt += """\t\t<audio src="%s"/>\n""" % row["url"]
txt += """\t</seq>\n</body>\n</smil>\n"""
return txt
# Stub import, only if needed
def xmlentities(s):
global xmlentities
from xml.sax.saxutils import escape as xmlentities
return xmlentities(s)
# generate filename for temporary .m3u, if possible with unique id
def tmp_fn(pls):
# use shoutcast unique stream id if available
stream_id = re.search("http://.+?/.*?(\d+)", pls, re.M)
stream_id = stream_id and stream_id.group(1) or "XXXXXX"
try:
channelname = main.current_channel
except:
channelname = "unknown"
return (str(conf.tmp) + os.sep + "streamtuner2."+channelname+"."+stream_id+".m3u", len(stream_id) > 3 and stream_id != "XXXXXX")