138 lines
5.2 KiB
Python
138 lines
5.2 KiB
Python
# -*- coding: utf-8 -*-
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import re
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import requests
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from flask import Flask, Response, redirect, request
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from requests.exceptions import (
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ChunkedEncodingError,
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ContentDecodingError, ConnectionError, StreamConsumedError)
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from requests.utils import (
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stream_decode_response_unicode, iter_slices, CaseInsensitiveDict)
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from urllib3.exceptions import (
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DecodeError, ReadTimeoutError, ProtocolError)
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# config
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# git使用cnpmjs镜像、分支文件使用jsDelivr镜像的开关，0为关闭，默认关闭
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jsdelivr = 0
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cnpmjs = 0
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size_limit = 1024 * 1024 * 1024 * 999 # 允许的文件大小，默认999GB，相当于无限制了 https://github.com/hunshcn/gh-proxy/issues/8
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HOST = '127.0.0.1' # 监听地址，建议监听本地然后由web服务器反代
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PORT = 80 # 监听端口
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ASSET_URL = 'https://hunshcn.github.io/gh-proxy' # 主页
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app = Flask(__name__)
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CHUNK_SIZE = 1024 * 10
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index_html = requests.get(ASSET_URL, timeout=10).text
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icon_r = requests.get(ASSET_URL + '/favicon.ico', timeout=10).content
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exp1 = re.compile(r'^(?:https?://)?github\.com/.+?/.+?/(?:releases|archive)/.*$')
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exp2 = re.compile(r'^(?:https?://)?github\.com/.+?/.+?/(?:blob)/.*$')
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exp3 = re.compile(r'^(?:https?://)?github\.com/.+?/.+?/(?:info|git-).*$')
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exp4 = re.compile(r'^(?:https?://)?raw\.githubusercontent\.com/.+?/.+?/.+?/.+$')
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exp5 = re.compile(r'^(?:https?://)?gist\.(?:githubusercontent|github)\.com/.+?/.+?/.+$')
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requests.sessions.default_headers = lambda: CaseInsensitiveDict()
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@app.route('/')
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def index():
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if 'q' in request.args:
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return redirect('/' + request.args.get('q'))
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return index_html
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@app.route('/favicon.ico')
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def icon():
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return Response(icon_r, content_type='image/vnd.microsoft.icon')
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def iter_content(self, chunk_size=1, decode_unicode=False):
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"""rewrite requests function, set decode_content with False"""
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def generate():
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# Special case for urllib3.
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if hasattr(self.raw, 'stream'):
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try:
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for chunk in self.raw.stream(chunk_size, decode_content=False):
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yield chunk
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except ProtocolError as e:
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raise ChunkedEncodingError(e)
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except DecodeError as e:
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raise ContentDecodingError(e)
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except ReadTimeoutError as e:
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raise ConnectionError(e)
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else:
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# Standard file-like object.
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while True:
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chunk = self.raw.read(chunk_size)
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if not chunk:
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break
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yield chunk
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self._content_consumed = True
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if self._content_consumed and isinstance(self._content, bool):
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raise StreamConsumedError()
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elif chunk_size is not None and not isinstance(chunk_size, int):
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raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
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# simulate reading small chunks of the content
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reused_chunks = iter_slices(self._content, chunk_size)
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stream_chunks = generate()
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chunks = reused_chunks if self._content_consumed else stream_chunks
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if decode_unicode:
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chunks = stream_decode_response_unicode(chunks, self)
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return chunks
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@app.route('/<path:u>', methods=['GET', 'POST'])
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def proxy(u):
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u = u if u.startswith('http') else 'https://' + u
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if u.rfind('://', 3, 9) == -1:
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u = u.replace('s:/', 's://', 1) # uwsgi会将//传递为/
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if not any([i.match(u) for i in [exp1, exp2, exp3, exp4, exp5]]):
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return Response('Invalid input.', status=403)
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if jsdelivr and exp2.match(u):
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u = u.replace('/blob/', '@', 1).replace('github.com', 'cdn.jsdelivr.net/gh', 1)
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return redirect(u)
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elif cnpmjs and exp3.match(u):
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u = u.replace('github.com', 'github.com.cnpmjs.org', 1) + request.url.replace(request.base_url, '', 1)
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return redirect(u)
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elif jsdelivr and exp4.match(u):
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u = re.sub(r'(\.com/.*?/.+?)/(.+?/)', r'\1@\2', u, 1)
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u = u.replace('raw.githubusercontent.com', 'cdn.jsdelivr.net/gh', 1)
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return redirect(u)
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else:
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if exp2.match(u):
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u = u.replace('/blob/', '/raw/', 1)
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headers = {}
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r_headers = dict(request.headers)
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if 'Host' in r_headers:
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r_headers.pop('Host')
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try:
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url = u + request.url.replace(request.base_url, '', 1)
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if url.startswith('https:/') and not url.startswith('https://'):
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url = 'https://' + url[7:]
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r = requests.request(method=request.method, url=url, data=request.data, headers=r_headers, stream=True)
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headers = dict(r.headers)
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if 'Content-length' in r.headers and int(r.headers['Content-length']) > size_limit:
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return redirect(u + request.url.replace(request.base_url, '', 1))
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def generate():
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for chunk in iter_content(r, chunk_size=CHUNK_SIZE):
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yield chunk
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return Response(generate(), headers=headers, status=r.status_code)
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except Exception as e:
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headers['content-type'] = 'text/html; charset=UTF-8'
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return Response('server error ' + str(e), status=500, headers=headers)
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# else:
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# return Response('Illegal input', status=403, mimetype='text/html; charset=UTF-8')
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if __name__ == '__main__':
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app.run(host=HOST, port=PORT)
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