Initial commit. Added downloader

stream/downloader.py

@@ -0,0 +1,134 @@
+import datetime
+import enum
+import logging
+import os
+import subprocess
+import time
+import requests
+
+TOKEN_URL = "https://id.twitch.tv/oauth2/token?client_id={0}&client_secret={1}&grant_type=client_credentials"
+HELIX_STREAM_URL = "https://api.twitch.tv/helix/streams?user_login={0}"
+
+logger = logging.getLogger(__name__)
+
+
+class TwitchStreamerStatus(enum.Enum):
+    ONLINE = 0
+    OFFLINE = 1
+    NOT_FOUND = 2
+    UNAUTHORIZED = 3
+    ERROR = 4
+
+
+class TwitchRecorder:
+    access_token = None
+
+    def __init__(self, client_id, client_secret, username, output_path, quality="480p", on_download=None):
+        # global configuration
+        self.disable_ffmpeg = False
+        self.refresh_timeout = 15
+        self.output_path = output_path
+        self.stream_uid = None
+        self.on_download = on_download
+
+        # twitch configuration
+        self.username = username
+        self.quality = quality
+        self.client_id = client_id
+        self.client_secret = client_secret
+        self.token_url = TOKEN_URL.format(self.client_id, self.client_secret)
+
+    def fetch_access_token(self):
+        token_response = requests.post(self.token_url, timeout=15)
+        token_response.raise_for_status()
+        token = token_response.json()
+        return token["access_token"]
+
+    def run(self):
+        # path to recorded stream
+        recording_path = os.path.join(self.output_path, "recorded", self.username)
+
+        # create directory for recordedPath and processedPath if not exist
+        if os.path.isdir(recording_path) is False:
+            os.makedirs(recording_path)
+
+        # make sure the interval to check user availability is not less than 15 seconds
+        if self.refresh_timeout < 15:
+            logger.warning("check interval should not be lower than 15 seconds")
+            self.refresh_timeout = 15
+            logger.warning("check interval set to 15 seconds")
+
+        self.access_token = self.fetch_access_token()
+        self.loop_check(recording_path)
+
+    def loop_check(self, recording_path):
+        logger.info("checking for %s every %s seconds, recording with %s quality",
+                    self.username, self.refresh_timeout, self.quality)
+        while True:
+            status, info = self.check_user()
+            if status == TwitchStreamerStatus.NOT_FOUND:
+                logger.error("username not found, invalid username or typo")
+                time.sleep(self.refresh_timeout)
+            elif status == TwitchStreamerStatus.ERROR:
+                logger.error("%s unexpected error. will try again in 5 minutes",
+                             datetime.datetime.now().strftime("%Hh%Mm%Ss"))
+                time.sleep(300)
+            elif status == TwitchStreamerStatus.OFFLINE:
+                logger.info("%s currently offline, checking again in %s seconds", self.username, self.refresh_timeout)
+                time.sleep(self.refresh_timeout)
+            elif status == TwitchStreamerStatus.UNAUTHORIZED:
+                logger.info("unauthorized, will attempt to log back in immediately")
+                self.access_token = self.fetch_access_token()
+            elif status == TwitchStreamerStatus.ONLINE:
+                logger.info("%s online, stream recording in session", self.username)
+
+                channels = info["data"]
+                channel = next(iter(channels), None)
+
+                recorded_filename = self.download_stream(channel, recording_path)
+
+                logger.info("recording stream is done")
+
+                if self.on_download is not None:
+                    self.on_download(recorded_filename)
+
+                time.sleep(self.refresh_timeout)
+
+    def check_user(self):
+        info = None
+        status = TwitchStreamerStatus.ERROR
+        try:
+            headers = {"Client-ID": self.client_id, "Authorization": "Bearer " + self.access_token}
+            r = requests.get(HELIX_STREAM_URL.format(self.username), headers=headers, timeout=15)
+            r.raise_for_status()
+            info = r.json()
+            if info is None or not info["data"]:
+                status = TwitchStreamerStatus.OFFLINE
+            else:
+                status = TwitchStreamerStatus.ONLINE
+        except requests.exceptions.RequestException as e:
+            if e.response:
+                if e.response.status_code == 401:
+                    status = TwitchStreamerStatus.UNAUTHORIZED
+                if e.response.status_code == 404:
+                    status = TwitchStreamerStatus.NOT_FOUND
+        return status, info
+
+    def download_stream(self, channel, recording_path):
+        filename = self.username + " - " + datetime.datetime.now() \
+            .strftime("%Y-%m-%d %Hh%Mm%Ss") + " - " + channel.get("title") + ".mp4"
+
+        filename = "".join(x for x in filename if x.isalnum() or x in [" ", "-", "_", "."])
+        recorded_filename = os.path.join(recording_path, filename)
+
+        # start streamlink process
+        subprocess.call([
+            "streamlink",
+            "--twitch-disable-ads",
+            "twitch.tv/" + self.username,
+            self.quality,
+            "-o",
+            recorded_filename
+        ])
+
+        return recorded_filename