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fetch.py
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fetch.py
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import base64
import os
import json
import xml.etree.ElementTree as tree
from datetime import datetime, timezone, timedelta
import requests
# https://source.chromium.org/chromium/chromium/src/+/main:chrome/installer/util/additional_parameters.cc;drc=406947a0f1e0e6b596d387b6b14156f369e8c55d;l=206
info = {
"win_stable_x86": {
"os": '''arch="x86"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="x86-stable"''',
},
"win_stable_x64": {
"os": '''arch="x64"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="x64-stable"''',
},
"win_stable_arm64": {
"os": '''arch="arm64"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="arm64-stable"''',
},
"win_beta_x86": {
"os": '''arch="x86"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="1.1-beta-arch_x86"''',
},
"win_beta_x64": {
"os": '''arch="x64"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="1.1-beta-arch_x64"''',
},
"win_beta_arm64": {
"os": '''arch="arm64"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="1.1-beta-arch_arm64"''',
},
"win_dev_x86": {
"os": '''arch="x86"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="2.0-dev-arch_x86"''',
},
"win_dev_x64": {
"os": '''arch="x64"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="2.0-dev-arch_x64"''',
},
"win_dev_arm64": {
"os": '''arch="arm64"''',
"app": '''appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" ap="2.0-dev-arch_arm64"''',
},
"win_canary_x86": {
"os": '''arch="x86"''',
"app": '''appid="{4EA16AC7-FD5A-47C3-875B-DBF4A2008C20}" ap="x86-canary"''',
},
"win_canary_x64": {
"os": '''arch="x64"''',
"app": '''appid="{4EA16AC7-FD5A-47C3-875B-DBF4A2008C20}" ap="x64-canary"''',
},
"win_canary_arm64": {
"os": '''arch="arm64"''',
"app": '''appid="{4EA16AC7-FD5A-47C3-875B-DBF4A2008C20}" ap="arm64-canary"''',
},
}
update_url = "https://tools.google.com/service/update2"
session = requests.Session()
def post(os: str, app: str) -> str:
xml = f"""<?xml version="1.0" encoding="UTF-8"?>
<request protocol="3.0" updater="Omaha" updaterversion="1.3.36.372" shell_version="1.3.36.352" ismachine="0" sessionid="{11111111-1111-1111-1111-111111111111}" installsource="taggedmi" requestid="{11111111-1111-1111-1111-111111111111}" dedup="cr" domainjoined="0">
<hw physmemory="16" sse="1" sse2="1" sse3="1" ssse3="1" sse41="1" sse42="1" avx="1"/>
<os platform="win" version="10.0.26100.1742" {os}/>
<app version="" {app}>
<updatecheck/>
<data name="install" index="empty"/>
</app>
</request>"""
r = session.post(update_url, data=xml)
r.raise_for_status()
return r.text
def decode(text):
root = tree.fromstring(text)
manifest_node = root.find(".//manifest")
if manifest_node is None:
print("Error: manifest_node is None")
return
manifest_version = manifest_node.get("version")
package_node = root.find(".//package")
package_name = package_node.get("name")
package_size = int(package_node.get("size"))
package_sha1 = base64.b64decode(package_node.get("hash")).hex()
package_sha256 = package_node.get("hash_sha256")
url_nodes = root.findall(".//url")
url_prefixes = [node.get("codebase") + package_name for node in url_nodes]
return {
"version": manifest_version,
"size": package_size,
"sha1": package_sha1,
"sha256": package_sha256,
"urls": url_prefixes,
}
def version_tuple(v):
return tuple(map(int, v.split(".")))
def load_json(file_path="data.json"):
if not os.path.exists(file_path):
return {}
try:
with open(file_path, "r") as f:
return json.load(f) or {}
except (json.JSONDecodeError, ValueError):
return {}
def fetch(info, results):
for k, v in info.items():
res = post(**v)
data = decode(res)
if data is None:
print(f"Error: No data returned for {k}")
continue
if version_tuple(data["version"]) < version_tuple(
results.get(k, {}).get("version", "0.0.0.0")
):
print("ignore", k, data["version"])
continue
results[k] = data
suffixes = ["B", "KB", "MB", "GB", "TB", "PB"]
def humansize(nbytes):
i = 0
while nbytes >= 1024 and i < len(suffixes) - 1:
nbytes /= 1024.0
i += 1
f = ("%.2f" % nbytes).rstrip("0").rstrip(".")
return f"{f} {suffixes[i]}"
def save_md(results, file_path="readme.md"):
index_url = "https://github.com/Bush2021/chrome_installer?tab=readme-ov-file#"
with open(file_path, "w") as f:
f.write("# Google Chrome 离线安装包（请使用 7-Zip 解压）\n")
f.write(
"稳定版存档：<https://github.com/Bush2021/chrome_installer/releases>\n\n"
)
f.write("最后检测更新时间\n")
now = datetime.now(timezone(timedelta(hours=-4)))
now_str = now.strftime("%Y-%m-%d %H:%M:%S (UTC-4)")
f.write(f"{now_str}\n\n")
f.write("## 目录\n")
for name in results.keys():
title = name.replace("_", " ")
link = index_url + title.replace(" ", "-")
f.write(f"* [{title}]({link})\n")
f.write("\n")
for name, version in results.items():
f.write(f'## {name.replace("_", " ")}\n')
f.write(f'**最新版本**：{version["version"]} \n')
f.write(f'**文件大小**：{humansize(version["size"])} \n')
f.write(f'**校验值（Sha256）**：{version["sha256"]} \n')
for url in version["urls"]:
if url.startswith("https://dl."):
f.write(f"**下载链接**：[{url}]({url}) \n")
f.write("\n")
def save_json(results, file_path="data.json"):
with open(file_path, "w") as f:
json.dump(results, f, indent=4)
def main():
results = load_json()
fetch(info, results)
save_md(results)
save_json(results)
if __name__ == "__main__":
main()