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crawler.py
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crawler.py
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"""
Main function
"""
import os
import sys
import time
import asyncio
import argparse
from datetime import datetime
import requests
class Crawler(object):
"""
Crawler for download 755 photos.
"""
img_path = 'images'
video_path = 'videos'
def __init__(self, talk_id):
self.session = requests.session()
self.talk_id = talk_id
self.url = f'https://api.7gogo.jp/web/v2/talks/{talk_id}/posts'
# Created directories for store files
self.dest_img_path = 'downloads{}{}{}{}'.format(
os.sep, self.talk_id, os.sep, self.img_path)
self.dest_video_path = 'downloads{}{}{}{}'.format(
os.sep, self.talk_id, os.sep, self.video_path)
if not os.path.isdir(self.dest_img_path):
os.makedirs(self.dest_img_path)
if not os.path.isdir(self.dest_video_path):
os.makedirs(self.dest_video_path)
# -
def download_file(self, url, filename, dest_path):
"""
Download photo.
Args:
(String) url
(String) file name (output)
"""
req = self.session.get(url, stream=True)
if req.status_code == 200:
total_length = req.headers.get('content-length')
dl_progress = 0
output_path = f"{dest_path}{os.sep}{filename}"
if not os.path.exists(output_path):
with open(output_path, 'wb') as o_file:
for chunk in req.iter_content(1024):
dl_progress += len(chunk)
o_file.write(chunk)
# Download progress report
percent = dl_progress / int(total_length)
print(f"\r{filename}: {percent:.2%}", end='\r')
print('')
else:
print(f'{filename}: File exist')
else:
print('Visit website fail')
def __get_latest_post_id(self, http_headers):
payload = {
'limit': 1,
}
r = self.session.get(self.url, headers=http_headers, params=payload)
if r.status_code != 200:
# handle connection fail
print('\x1b[0;30;43mSet post id is 1.\x1b[0m')
return 1
else:
try:
latest_post_id = r.json()['data'][0]["post"]["postId"]
return latest_post_id
except (IndexError, KeyError):
return 1
def __parse(self, raw_post, post_time):
# Image
raw_body = raw_post.get('body', [])
for i in range(0, len(raw_body)):
# Image & video
image_url = raw_body[i].get('image', '')
video_url = raw_body[i].get('movieUrlHq', '')
# filename
file_date = datetime.utcfromtimestamp(
post_time).strftime("%y%m%d")
rand_num = str(post_time)[-3:] # prevent duplicate filename
if image_url and image_url.startswith("http"):
self.download_file(
image_url,
f"{file_date}_{rand_num}.jpg",
self.dest_img_path)
if video_url and video_url.startswith("http"):
self.download_file(
video_url,
f"{file_date}_{rand_num}.mp4",
self.dest_video_path)
async def run(self, start_time=0):
headers = {
'Host': 'api.7gogo.jp',
'Origin': 'https://7gogo.jp',
'Accept': "*/*",
'Accept-Language': 'zh-TW,zh;q=0.9,en-US;q=0.8,en;q=0.7',
'Accept-Encoding': 'gzip, deflate, br',
'Cache-Control': 'no-cache',
'Connection': 'keep-alive',
'Pragma': 'no-cache',
'User-Agent': ('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6)'
' AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/70.0.3538.110 Safari/537.36'),
'Referer': self.url,
'X-Requested-With': 'XMLHttpRequest',
# 'X-7gogo-WebAuth': ''
}
page_limit = 100
payload = {
'limit': page_limit,
}
# try to get latest post id
post_rec = self.__get_latest_post_id(headers)
if post_rec <= 1: # fail
payload['direction'] = 'NEXT'
payload['targetId'] = 1
else:
payload['direction'] = 'PREV'
payload['targetId'] = post_rec
# -
IS_END = False
while True:
"""
1. Only targetId: get latest post (100 post).
2. PREV:
if maximum post targetId is 13949,
set targetId <= 14058 (14058-13949=109) will get latest data.
set targetId > 14059 will no data
"""
payload['targetId'] = post_rec
if payload['direction'] == 'NEXT':
post_rec += 100
else:
if post_rec > 100:
post_rec -= 100
else:
break
# for PREV
r = self.session.get(self.url, headers=headers, params=payload)
if r.status_code != 200:
# handle connection fail
print('\x1b[0;30;43mError: Connection fail. '
'Please check your URL.\x1b[0m')
break
else:
raw_data = r.json()
content = raw_data['data']
# handle no post
if not content:
print('No more content !')
break
for i in range(page_limit):
try:
post = content[i]['post']
post_time = int(post['time'])
owner = post['owner']
except IndexError:
IS_END = True
break
except KeyError:
print('Website API was changed !')
IS_END = True
break
# if msg time too old, skip it.
if int(post_time) < start_time:
if payload['direction'] == 'NEXT':
print('.', end='', flush=True)
continue
else:
IS_END = True
break
# This post was deleted
if owner is None: # or use 'postType' == 100
continue
self.__parse(post, post_time)
if IS_END:
print('Finished !')
break
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description='Download 755 photos + videos.')
parser.add_argument('url', type=str, nargs='?',
help='Target Url: ex. https://7gogo.jp/<username>')
parser.add_argument('start_time', type=str, nargs='?',
default=datetime.utcnow().strftime("%y%m%d"),
help='Post Date Start (yymmdd): ex. 171101')
args = parser.parse_args()
if args.url and args.start_time:
try:
if not args.url.startswith('https://7gogo.jp/'):
raise ValueError
args.start_time = time.mktime(
time.strptime(args.start_time, "%y%m%d"))
except ValueError:
parser.print_help()
print('\x1b[0;30;43mPlease check your arguments.\x1b[0m')
sys.exit()
talk_id = args.url.split('/')[-1]
my_cwawler = Crawler(talk_id)
loop = asyncio.get_event_loop()
task = asyncio.Task(my_cwawler.run(args.start_time))
loop.run_until_complete(task)
else:
parser.print_help()