Python 实现 Filebrowser

异步IO实现，HTTP1.0， 200，404，405等信息。实现GET，HEAD, POST方法

一、代码实现

FileBrowser.py

p# -*- coding: utf-8 -*-
# @File    : FileBrowser.py
# @Author  : zy
import argparse
import asyncio
import urllib.parse
import mimetypes
import os, json, timehtml404 = b'<html><head><title>404 Not Found</title></head><body><center><h1>404 Not Found</h1></center></body></html>'
html405 = b'<html><head><title>405 Method Not Found</title></head><body><center><h1>405 Method Not Found</h1></center></body></html>'async def dispatch(reader, writer):try:data = await reader.readline()if data == b'\r\n':returnmessage = data.decode().split(' ')print(message)  # ['GET', '/', 'HTTP/1.1\r\n']# message[0] method# message[1] dirif message[1] == "./favicon.ico":returnif message[0] == "GET":  # Method GET returns 200 response.dir_path = urllib.parse.unquote(message[1])if dir_path[0] != '/':dir_path = '/' + dir_path[0]relative_path = root_dir + dir_pathprint(relative_path)if os.path.isfile(relative_path):  # open the file and guess the mimetype.mimetype = mimetypes.guess_type(relative_path)[0]if mimetype is None:mimetype = 'application/octet-stream'httpresponse = [b'HTTP/1.0 200 OK\r\n',bytes('Content-Type:', encoding='UTF-8') +bytes(mimetype + '; charset=utf-8\r\n', encoding='UTF-8'),bytes('Content-Length: ' + str(os.path.getsize(relative_path)) + '\r\n',encoding="UTF-8"),b'\r\n']file = open(relative_path, 'rb')httpresponse.append(file.read())writer.writelines(httpresponse)elif os.path.isdir(relative_path):  # homepagehttpresponse = [b'HTTP/1.0 200 OK\r\n',b'Content-Type:text/html; charset=utf-8\r\n',b'Connection: close\r\n', b'\r\n',bytes('<html><head><title>Index of ' + relative_path + '</title></head><body>\r\n',encoding="UTF-8"),bytes('<div style="position:relative;"><img src="https://www.sustech.edu.cn/wp-content/uploads/%E6%A0%A1%E5%8E%86-1.jpg?id=8835261" width="100%"height="30%"></div><div style="position:absolute; left:80px; top:50px; "><img src="https://www.sustech.edu.cn/wp-content/themes/twentyseventeen/images/sustech-logo-cn.png" width="433" height="86"/></div>',encoding='UTF-8'),bytes('<h1>Index of ' + relative_path + '</h1><hr><ul>\r\n', encoding='UTF-8'),bytes('<li><a href="../">..</a></li><br>\r\n', encoding='UTF-8')]dirlist = os.listdir(relative_path)print(dirlist)for i in range(len(dirlist)):if os.path.isfile(dirlist[i]):  # filehttpresponse.append(bytes('<li><a href="' + dirlist[i] + '">' + dirlist[i] + "</a></li><br>\r\n",encoding='UTF-8'))else:  # directoryhttpresponse.append(bytes('<li><a href="' + dirlist[i] + '/">' + dirlist[i] + '</a></li><br>\r\n',encoding='UTF-8'))httpresponse.append(bytes('</ul><hr></body></html>', encoding='UTF-8'))writer.writelines(httpresponse)else:  # Not existing file or directory returns 404 response.writer.writelines([b'HTTP/1.0 404 Method Not Found\r\n',b'Content-Type:text/html; charset=utf-8\r\n',b'Connection: close\r\n',b'\r\n',html404,b'\r\n'])await writer.drain()writer.close()elif message[0] == "HEAD":  # Method HEAD returns 200 response and the head of http response if such dir exists .dir_path = urllib.parse.unquote(message[1])if dir_path[0] != '/':dir_path = '/' + dir_path[0]relative_path = root_dir + dir_pathprint(relative_path)if os.path.isfile(relative_path):  # Add mimetype to the http header if the path is a file.mimetype = mimetypes.guess_type(relative_path)[0]if mimetype is None:mimetype = 'application/octet-stream'httpresponse = [b'HTTP/1.0 200 OK\r\n',bytes('Content-Type:', encoding='UTF-8') +bytes(mimetype + '; charset=utf-8\r\n', encoding='UTF-8'),bytes('Content-Length: ' + str(os.path.getsize(relative_path)) + '\r\n',encoding="UTF-8"),b'\r\n']writer.writelines(httpresponse)elif os.path.isdir(relative_path):  # Edit the http header of a directoryhttpresponse = [b'HTTP/1.0 200 OK\r\n',b'Content-Type:text/html; charset=utf-8\r\n',b'Connection: close\r\n', b'\r\n',]writer.writelines(httpresponse)else:  # Not existing file or directory returns 404 response.writer.writelines([b'HTTP/1.0 404 Method Not Found\r\n',b'Content-Type:text/html; charset=utf-8\r\n',b'Connection: close\r\n',b'\r\n',html404,b'\r\n'])await writer.drain()writer.close()elif message[0] == "POST":  # Method POST returns 405 response.writer.writelines([b'HTTP/1.0 405 Method Not Allowed\r\n',b'Content-Type:text/html; charset=utf-8\r\n',b'Connection: close\r\n',b'\r\n',html405,b'\r\n'])await writer.drain()writer.close()else:  # Other method returns 405 response.writer.writelines([b'HTTP/1.0 405 Method Not Allowed\r\n',b'Content-Type:text/html; charset=utf-8\r\n',b'Connection: close\r\n',b'\r\n',html405,b'\r\n'])await writer.drain()writer.close()except ConnectionError:passif __name__ == '__main__':# python FileBrowser.py --port 8000 --dir ~/parser = argparse.ArgumentParser(description='Simple Web File Browser')parser.add_argument('--port', type=int, default=8080,help='an integer for the port of the simple web file browser')parser.add_argument('--dir', type=str, default="./",help='The Directory that the browser should display for home page')args = parser.parse_args()loop = asyncio.get_event_loop()coro = asyncio.start_server(dispatch, '127.0.0.1', port=args.port, loop=loop)server = loop.run_until_complete(coro)root_dir = args.dirif root_dir[-1] == '/':root_dir = root_dir[:-1]print("server run at port %d" % args.port)print("server run at dir %s" % args.dir)print('Serving on {} and Hit Ctrl + C to end the server'.format(server.sockets[0].getsockname()))try:loop.run_forever()except KeyboardInterrupt:exit()server.close()loop.run_until_complete(server.wait_closed())loop.close()

在terminal中运行py文件，指定端口和路径：
python3 FileBrowser.py --port 8080 --dir ~/
实例：
打开浏览器看看效果：(自己随便加了个图片)

已知MIME TYPE 打开文件并以HTML文件展示在浏览器，例如打开FileBrowser.py

未知MIME Type 会下载到本地：

进入文件夹后可以通过.. 返回上级目录：

访问不存在的文件，如在地址栏中输入URL:

则会报出404页面：

HEAD 方法测试：

POST 返回405：

二、emm

cmd 输入 python -m http.server 就可以实现当前文件夹的file browser。
例如：

emm，这不啥也有了吗(404 也有。。。)

三、总结

需要了解HTTP报文结构：
结构其实都是：

注意blank line 和 crlf 都不可以少。(\r\n)

需要自学点HTML（Message body内部）

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Python 实现 Filebrowser

Python 实现 Filebrowser

一、代码实现

二、emm

三、总结

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Python 实现 Filebrowser

Python 实现 Filebrowser

一、 代码实现

二、emm

三、总结

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一、代码实现