基于Python SimpleHTTPServer.py的修改脚本：HTTP文件服务器，修正中文目录列表，支持视频文件在线播放

# -*- coding: gbkimport SimpleHTTPServer
import BaseHTTPServer
import time
import SocketServer
import os
import threading
import socket
import re#下面的导入从SimpleHTTPServer.py复制：
import posixpath
import urllib
import urlparse
import cgi
import sys
import shutil
import mimetypes
try:from cStringIO import StringIO
except ImportError:from StringIO import StringIOPORT = 8888class MyThreadingHTTPServer(SocketServer.ThreadingTCPServer):allow_reuse_address = 1def server_bind(self):"""Override server_bind to store the server name."""SocketServer.TCPServer.server_bind(self)host, port = self.socket.getsockname()[:2]self.server_name = socket.getfqdn(host)self.server_port = port#Handler = SimpleHTTPServer.SimpleHTTPRequestHandler
class MyHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):def dumpRequestHeaders(self):print 'dumpRequestHeaders: raw_requestline=%s \nheaders=\n%s' % (self.raw_requestline,self.headers)def copyfile_by_range(self, fin, fout, start, end):print "copyfile_by_range: start=%d end=%d" % (start, end)READ_BUFFER_SIZE = 4*1024;fin.seek(start, os.SEEK_SET)if end<0: #代表原始Range请求未指定完整范围，只指定了开始位置buf = fin.read(READ_BUFFER_SIZE) #FIXME：健壮性fix，如果读到内容小于size参数？需要判断len(buf)if len(buf)!=READ_BUFFER_SIZE:print "copyfile_by_range: len(buf)!=READ_BUFFER_SIZE 1 len(buf)=%d" % (len(buf))while buf:fout.write(buf)fout.flush()buf = fin.read(READ_BUFFER_SIZE)if len(buf)==0:break #??if len(buf)!=READ_BUFFER_SIZE:print "copyfile_by_range: len(buf)!=READ_BUFFER_SIZE 2 len(buf)=%d" % (len(buf))fout.write(buf)breakelse:bytes_left = end-start+1while bytes_left >= READ_BUFFER_SIZE:buf = fin.read(READ_BUFFER_SIZE)if len(buf)!=READ_BUFFER_SIZE:print "copyfile_by_range: len(buf)!=READ_BUFFER_SIZE 3 len(buf)=%d" % (len(buf))fout.write(buf)bytes_left = bytes_left - READ_BUFFER_SIZEif bytes_left>0:buf = fin.read(bytes_left)if len(buf)!=bytes_left:print "copyfile_by_range: len(buf)!=bytes_left len(buf)=%d bytes_left=" % (len(buf), bytes_left)fout.write(buf)            def do_GET(self):self.dumpRequestHeaders() #用于查看客户端浏览器的User-Agent设置;##SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)f, range = self.send_head() #原来的send_head这个函数实现有点莫名其妙？if f:if range:#注意，响应头部已经在send_head()里设置完成了，这里只需要调整io读写指针self.copyfile_by_range(f, self.wfile, range[0], range[1])else:self.copyfile(f, self.wfile)f.close()#重载SimpleHTTPServer.py里的实现，以实现：（1）按修改日期排序（2）正确显示中文#TODO：支持更多查询参数？html输出代码美化？def list_directory(self, path):"""Helper to produce a directory listing (absent index.html).Return value is either a file object, or None (indicating anerror).  In either case, the headers are sent, making theinterface the same as for send_head()."""try:list = os.listdir(path)except os.error:self.send_error(404, "No permission to list directory")return None#list.sort(key=lambda a: a.lower())def compare_by_modtime(x, y):stat_x = os.stat(path + "/" + x)stat_y = os.stat(path + "/" + y)if stat_x.st_mtime < stat_y.st_mtime:return -1elif stat_x.st_mtime > stat_y.st_mtime:return 1else:return 0list.sort(lambda x,y: compare_by_modtime(y,x)) #最近修改的排在前面f = StringIO()displaypath = cgi.escape(urllib.unquote(self.path))f.write('<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">')f.write("<html>\n<title>Directory listing for %s</title>\n" % displaypath)f.write("<body>\n<h2>Directory listing for %s</h2>\n" % displaypath)f.write("<hr>\n<ul>\n")for name in list:fullname = os.path.join(path, name)displayname = linkname = name# Append / for directories or @ for symbolic linksif os.path.isdir(fullname):displayname = name + "/"linkname = name + "/"if os.path.islink(fullname):displayname = name + "@"# Note: a link to a directory displays with @ and links with /f.write('<li><a href="%s">%s</a>|<a href="/playvideo?path=%s">播放</a>\n'% (urllib.quote(linkname), cgi.escape(displayname), urllib.quote( os.path.join(self.path, name))))#self.path是浏览器请求路径，而path是本地文件系统路径f.write("</ul>\n<hr>\n</body>\n</html>\n")length = f.tell()f.seek(0)self.send_response(200)encoding = "gbk" #sys.getfilesystemencoding()self.send_header("Content-Type", "text/html; charset=%s" % encoding)self.send_header("Content-Length", str(length))self.end_headers()return f#TODO：支持Range请求，这样可以提供基于HTTP的视频流媒体服务def send_head(self):"""overwrite send_head to set Last-Modified & Expires to disable browser cache;"""unquoted_path = urllib.unquote(self.path)print "send_head: self.path=%s unquoted_path=%s" % (self.path, unquoted_path)PLAYVIDEO_REQUEST = re.compile(r'/playvideo\?path=(.+)$')m = PLAYVIDEO_REQUEST.match(unquoted_path)if m: #TODO: 重构这里的代码     video_path = m.group(1)print "send_head: video_path=%s" % video_pathself.send_response(200)self.send_header("Content-Type", "text/html")self.end_headers()self.wfile.write('<video src="%s" controls></video>' % video_path) #注意，这个地方不需要urllib.quotereturn (None,None)path = self.translate_path(self.path)f = Noneif os.path.isdir(path):if not self.path.endswith('/'):# redirect browser - doing basically what apache doesself.send_response(301)self.send_header("Location", self.path + "/")self.wfile.flush()time.sleep(1)self.end_headers()return (None,None)for index in "index.html", "index.htm":index = os.path.join(path, index)if os.path.exists(index):path = indexbreakelse:return (self.list_directory(path), None)ctype = self.guess_type(path)try:# Always read in binary mode. Opening files in text mode may cause# newline translations, making the actual size of the content# transmitted *less* than the content-length!f = open(path, 'rb')#Get file size:f.seek(0, os.SEEK_END)filesize = f.tell()f.seek(0, os.SEEK_SET)#TODO: 检查原始请求是否指定了Range头部if self.headers.has_key("Range"):            range_value = self.headers["Range"]print "send_head: range_value=[%s]" % range_value#直接使用正则表达式匹配: Range: bytes=100-HTTP_RANGE_HEADER = re.compile(r'bytes=([0-9]+)\-(([0-9]+)?)')m = re.match(HTTP_RANGE_HEADER, range_value)if m:start_str = m.group(1)start = int(start_str)end_str = m.group(2)end = -1if len(end_str)>0:end = int(end_str)#现在可以写Range响应头部了：self.send_response(206, "Partial Content")self.send_header("Content-Type", ctype)self.send_header("Content-Length", str(filesize)) #or str(file_stat[6])self.send_header("Accept-Ranges", "bytes")if end<0:content_range_header_value = "bytes %d-%d/%d" % (start, filesize-1, filesize)else:content_range_header_value = "bytes %d-%d/%d" % (start, end, filesize)self.send_header("Content-Range", content_range_header_value)print "send_head: ok, serve 206 for Range request %s-%s，Content-Range=%s" % (start_str, end_str, content_range_header_value)self.send_header("Connection", "close")self.end_headers()return (f, [start, end])else:print "send_head: error! INVALID Range request header!!"self.send_error(400, "Bad Request")self.wfile.flush()self.end_headers()return (None,None)            except IOError:self.send_error(404, "File not found")return (None,None)self.send_response(200)self.send_header("Content-Type", ctype)file_stat = os.fstat(f.fileno())self.send_header("Content-Length", str(file_stat[6]))#self.send_header("Last-Modified", self.date_time_string(file_stat.st_mtime))self.send_header("Last-Modified", self.date_time_string(time.time()))self.send_header("Expires", self.date_time_string(time.time()+5))self.send_header("Cache-control", "no-cache, no-store, must-revalidate, max-age=0, proxy-revalidate, no-transform")self.send_header("Pragma", "no-cache")self.end_headers()return (f, None)s = MyThreadingHTTPServer(("", PORT), MyHTTPRequestHandler)
s.serve_forever()

#已知问题：当Chrome以仿真模拟移动设备播放视频时，会出现奇怪的net::ERR_CONTENT_LENGTH_MISMATCH错误，桌面情况下Chrome和Firefox都可以正常播放视频，但是Edge不可以。

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基于Python SimpleHTTPServer.py的修改脚本：HTTP文件服务器，修正中文目录列表，支持视频文件在线播放

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