especificos-videos/back/tasks.py

import os.path
import datetime
import json
import thumb
import time

from constants import CUT_OUTPUT_PATH
from subprocess import Popen,PIPE
from rq import get_current_job,Queue
from rq.registry import StartedJobRegistry,FinishedJobRegistry 
from rq.job import Job
from rq.decorators import job
from worker import conn,q
from dateutil import tz
from db import db

d = db()
date_fmt='%d/%m/%Y, %H:%M'

def utctolocal(date):
    date=date.replace(tzinfo=tz.tzutc())
    return date.astimezone(tz.tzlocal())

def result(job_key):
    """Get job result from key. throws exception if non-existing key"""
    job = Job.fetch(job_key, connection=conn)
    eq_at=utctolocal(job.enqueued_at)
    if job.is_finished:
        return ("Result: %s, enqueued at %s" %
                    (str(job.result),eq_at.strftime(date_fmt)), 200)
    else:
        return ("Process: %s" % json.dumps(job.meta), 202)

def l_from_ids(ids,status=None):
    ret = []
    for job_id in ids:
        job = Job.fetch(job_id, connection=conn)
        out = job.meta
        out["eq"]=utctolocal(job.enqueued_at).strftime(date_fmt)
        out["working"]=True
        out["result"]=job.result
        if status:
            out["progress"]=status
        ret.append(out)
    return ret

def jobs():
    ret = []
    ids = StartedJobRegistry(name='default', connection=conn).get_job_ids()
    ret.extend(l_from_ids(ids))
    ids = FinishedJobRegistry(name='default', connection=conn).get_job_ids()
    ret.extend(l_from_ids(ids,'Finished'))

    for q_name in q.all(connection=conn):
        ids = q_name.job_ids
        ret.extend(l_from_ids(ids,'Waiting'))

    return ret

def upload_video(_id,prof,texto1,texto2):
    vid=d.processed(_id)
    ul_file = vid["out_fname"]
    titulo = ("%s - %s - %s" % (prof,texto1,texto2))
    thumb_file = thumb.create_thumb(prof,texto1,texto2)
    job = upload.delay(titulo, thumb_file, ul_file)
    job.meta["type"]="Youtube"
    job.meta["target"]=titulo


@job('default',connection=conn, timeout=3600*2, result_ttl=360)
def upload(title,thumb_path,video_path):
    import youtube_upload.main
    j=get_current_job()
    job_start=datetime.datetime.now()
    v_id=youtube_upload.main.main(title,thumb_path,video_path,job=j)
    job_end=datetime.datetime.now()
    d.insert_uploaded({'title': title,'yt': v_id, 'video':video_path, 'enqueued_at': job_start, 'finished_at': job_end })
    j.meta["working"]=False
    j.save()
    return v_id

@job('default',connection=conn, timeout=30, result_ttl=135)
def long_job(arg):
    job = get_current_job()
    job.meta['type'] = "Test"
    job.meta['target'] = 20
    job.save()
    for i in range(20):
        time.sleep(1)
        job = get_current_job()
        job.meta['progress'] = i
        job.save()
        print("working")
    #push to db, return id if ok. return error if not ok
    return "37"




@job('default',connection=conn, timeout=360*2, result_ttl=360)
def crop_video(in_fname,start_time,end_time,out_fname):
    job_start = datetime.datetime.now()
    if not os.path.isfile(in_fname):
        return { "status":"error",
                 "error": "El archivo %s no existe" % in_fname
               }
    out_fname=os.path.join(CUT_OUTPUT_PATH,out_fname)
    if os.path.isfile(out_fname):
        return { "status":"error",
                 "error": "El archivo %s existe" % out_fname
               }

    process = [ 'ffmpeg',
                '-loglevel', 'error',
                '-stats',
                '-i', in_fname,
                '-ss', str(start_time),
                '-t', str(end_time),
                '-c', 'copy',
                '-movflags', '+faststart',
                '-f','mp4',
                out_fname
              ]

    job = get_current_job()
    job.meta["type"]="Crop"
    job.save()
    out = run_process(process)
    if out == "":
        out = "Proceso finalizado"


    job_end = datetime.datetime.now()
    d.insert_processed({
                'job_start': job_start,
                'job_end':   job_end,
                'start_time':start_time,
                'end_time':  end_time,
                'in_fname':  in_fname,
                'out_fname': out_fname
                })
    job.meta["working"]=False
    job.save()
    return out

def run_process(process = None):
    if process is None or type(process) is not list:
        return { "status": "error",
                 "error": "Argumento process invalido"
               }
    proc=Popen(process, stderr=PIPE, universal_newlines=True)
    while True:
        line = proc.stderr.readline()
        if line != '' and line !=b'':
            job = get_current_job()
            job.meta['progress'] = line.rstrip()
            job.save()
        else:
            job.meta['progress'] = "Finalizado"
            job.save()
            break
    return ""