Python script to download Zwift updates. Fixes the Z113 error/ Update failure "at line 594 in patcher.cpp"

download_zwift_updates.py

#
# To use make sure to install the following packages:
# pip install requests pyOpenSSL ndg-httpsclient pyasn1
#


import sys
import xml.etree.ElementTree as ET
#import ipdb
import requests
import binascii
import os.path
import os

ZWIFT_CUR_VER_FILE = "Zwift_ver_cur.xml"
ZWIFT_BASE_URL = "https://cdn.zwift.com/gameassets/Zwift_Updates_Root/"
ZWIFT_CUR_VER_URL = "https://cdn.zwift.com/gameassets/Zwift_Updates_Root/{}".format(ZWIFT_CUR_VER_FILE)


def get_latest_zwift_manifest(output_dir):
	cur_ver_file = requests.get(ZWIFT_CUR_VER_URL)
	file(os.path.join(output_dir, ZWIFT_CUR_VER_FILE), "w+").write(cur_ver_file.content)
	ver = ET.fromstring(cur_ver_file.content)
	return ver.get('manifest')


def get_manifest_file(fname, output_dir):
	r = requests.get("{}{}".format(ZWIFT_BASE_URL, fname))
	file(os.path.join(output_dir, fname), "w+").write(r.content)
	return r.content

def create_dir_if_missing(path):
	path, fn = os.path.split(path)
	if not os.path.isdir(path):
		os.makedirs(path)


def format_asset_url(zwift_folder, path):
	return "{}{}/{}".format(ZWIFT_BASE_URL, zwift_folder, path.replace("\\", "/"))

def download_file(url, dst, checksum):
	print "Downloading file from {} to {} [expected crc={}]".format(url, dst, checksum)

	if os.path.isfile(dst):
		current_crc = binascii.crc32(file(dst, "rb").read())
		if str(current_crc) == str(checksum):
			print "File already downloaded.. skipping"
			return

	headers = {'Cache-Control': 'no-cache', 'Pragma': 'no-cache'}
	r = requests.get(url, headers=headers)
	with open(dst, "w+b") as code:
		content = r.content
		crc = binascii.crc32(content)
		code.write(content)

		if str(crc) != str(checksum) and checksum != '-1':
			print "checksum mismatch"
			ipdb.set_trace()

		print "Total bytes: {} CRC: {}".format(len(content), crc)

	print "  Done"	


def main():
	try:
		prog, outdir = sys.argv
	except:
		print "Error: download_zwift.py <outdir>"
		sys.exit(0)

	print "Downloading manifest.."
	latest_manifest = get_latest_zwift_manifest(outdir)
	manifest_file = get_manifest_file(latest_manifest, outdir)

	print "Manifest version: {}".format(latest_manifest)

	print "Reading manifest..."
	root = ET.fromstring(manifest_file)

	folder_name = root.get('folder')	
	print "Folder is {}".format(folder_name,)
	files = root.getchildren()[0]
	assert files.tag == 'files'
	files = files.getchildren()

	print "Total files to download {}".format(len(files),)

	for f in files:
		path = f.find('path').text
		checksum = f.find('checksum').text
		download_url = format_asset_url(folder_name, path)
		output_file = os.path.join(outdir, path)
		create_dir_if_missing(output_file)

		print "Download url: {}".format(download_url)

		download_file(download_url, output_file, checksum)	

	print "All done"

if __name__ == "__main__":
	main()

Can I get a Python 3+ compatible version of this code... tried now and started seeing quite some Print syntax errors, was about parantheses...tried my best to get that going. Now, I face ....

Downloading manifest..
Traceback (most recent call last):
File "D:\Zwift\download_zwift_updates.py", line 104, in
main()
File "D:\Zwift\download_zwift_updates.py", line 74, in main
latest_manifest = get_latest_zwift_manifest(outdir)
File "D:\Zwift\download_zwift_updates.py", line 22, in get_latest_zwift_manifest
file(os.path.join(output_dir, ZWIFT_CUR_VER_FILE), "w+").write(cur_ver_file.content)
NameError: name 'file' is not defined

... my little reading around it points to Python version compatibility, etc.

I had Z113 patcher.cpp problem while trying to install Zwift.
The method provided by Kostyay helped me and finally Zwift is working!!!
Dear @nadodiganesh yo should change "<path\to\zwift\install\dir>" to insall dir where Zwift was installed. I mean you should write this command to cmd

C:\Python27\python download_zwift_updates.py "C:\Program Files (x86)\Zwift"