resume_http_handler.py

import os
import http.server
import posixpath
import urllib
import cgi
import shutil
import mimetypes
import re
from http.server import HTTPServer, BaseHTTPRequestHandler

""" Resume HTTP Server With Upload.
This module builds on http.server by implementing the standard GET and HEAD requests in a fairly straightforward manner.
"""
__version__ = "0.1"
__all__ = ["ResumeHTTPHandler"]
__author__ = "Ellick Lu, Quantum HR"
class ResumeHTTPHandler(BaseHTTPRequestHandler):
	server_version = "SimpleHTTPWithUpload/" + __version__
	def do_GET(self):
		"""Serve a GET request."""
		f = self.send_head()
		if f:
			self.wfile.write(f)
		templateStr = '''<html>  
<head>  
<title>QR Link Generator</title>  
</head>  
<body>  
%s
<br>  
<br>  
<form action="/qr" name=f method=""><input maxLength=1024 size=70  
name=s value="" title="Text to QR Encode"><input type=submit  
value="Show QR" name=qr>  
</form>
</body>  
</html> '''
	def do_HEAD(self):
		"""Serve a HEAD request."""
		f = self.send_head()

	def do_POST(self):
		"""Serve a POST request."""
		r, info = self.deal_post_data()

		print(info)
		print("uploaded by:", self.client_address)
		info = info.replace('\n', '<br>')
		f = ('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">') +\
			('<html><head>') +\
			('<meta http-equiv="Content-Type" content="text/html; charset=utf-8">') +\
			('<title>Upload Result Page</title>') +\
			('</head><body>') +\
			('<h1>Upload Result Page</h1>') +\
			('<hr>')
		if r:
			f = f + ('<strong>Success:<strong><br/>') + info
		else:
			f = f + ('<strong>Failed:<strong>') + info
		f = f + '<br><a href="%s">back</a>' % self.headers['referer'] +\
			'</body></html>'

		f = f.encode('utf-8')
		length = len(f)
		self.send_response(200)
		self.send_header("Content-type", "text/html")
		self.send_header("Content-Length", str(length))
		self.end_headers()
		self.wfile.write(f)


	'''
	POST data
	------WebKitFormBoundaryLVlRNkjiiJLtNYQE
	Content-Disposition: form-data; name="file"; filename="file1.txt"
	Content-Type: text/plain

	content in file1
	hello file1
	------WebKitFormBoundaryLVlRNkjiiJLtNYQE
	Content-Disposition: form-data; name="file"; filename="file2.txt"
	Content-Type: text/plain

	content in file2
	hello file2
	------WebKitFormBoundaryLVlRNkjiiJLtNYQE--
	'''
	def deal_post_data(self):
		boundary = self.headers["Content-Type"].split("=")[1]

		boundary_begin = ('--' + boundary + '\r\n').encode('utf-8')
		boundary_end = ('--' + boundary + '--\r\n').encode('utf-8')

		return_status = True
		return_info = '\n'
		outer = 1
		inner = 2
		leave = 3
		loop_info = outer # 1: outer loop, 2: inner_loop, 3: leave and return

		# first line
		# b'------WebKitFormBoundaryLVlRNkjiiJLtNYQE'
		line = self.rfile.readline()
		while loop_info == outer:
			# print(line)
			line = line
			if line != boundary_begin:
				return_status = False
				return_info += "Content NOT begin with boundary\n"
				break

			# get filename
			# b'Content-Disposition: form-data; name="file"; filename="file1.txt"'
			line = self.rfile.readline().decode('utf-8').rstrip('\r\n')
			# print(line)
			filename = re.findall(r'filename="(.*)"', line)[0]
			# print(filename)
			if not filename:
				return_status = False
				return_info += "Can't find out file name...\n"
				loop_info = leave
				break
			path = self.translate_path(self.path)
			filename = os.path.join(path, filename)
			# if filename alread exists
			if os.path.exists(filename):
				filename += "_copy"

			# second line
			# b'Content-Type: text/plain'
			line = self.rfile.readline()

			# blank line
			line = self.rfile.readline()

			loop_info = inner
			# POST data
			try:
				with open(filename, 'wb') as f:
					while loop_info == inner:
						line = self.rfile.readline()
						# print(line)
						if line == boundary_begin:
							loop_info = outer
							# print('out')
							break
						elif line == boundary_end:
							# print('leave')
							loop_info = leave
							break
						else:
							# line 还是二进制形式, realine() 不会删掉二进制的'\n'
							f.write(line)
			except Exception as e:
				loop_info = leave
				return_status = False
				return_info += 'Exception!\n'
			return_info += filename + '\n'
		return (return_status, return_info)

	def send_head(self):
		"""Common code for GET and HEAD commands.
		This sends the response code and MIME headers. Return value is either a file object (which has to be copied
		to the outputfile by the caller unless the command was HEAD, and must be closed by the caller under all
		circumstances), or None, in which case the caller has nothing further to do.
		"""
		path = self.translate_path(self.path)
		f = None
		if os.path.isdir(path):
			if not self.path.endswith('/'):
				# redirect browser - doing basically what apache does
				self.send_response(301)
				self.send_header("Location", self.path + "/")
				self.end_headers()
				return None
			for index in "index.html", "index.htm":
				index = os.path.join(path, index)
				if os.path.exists(index):
					path = index
					break
			else:
				return self.list_directory(path)
		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')
		except IOError:
			self.send_error(404, "File not found")
			return None
		self.send_response(200)
		self.send_header("Content-type", ctype)
		fs = os.fstat(f.fileno())
		self.send_header("Content-Length", str(fs[6]))
		self.send_header("Last-Modified", self.date_time_string(fs.st_mtime))
		self.end_headers()
		data = f.read()
		f.close()

		return data

	def list_directory(self, path):
		"""Helper to produce a directory listing (absent index.html). Return value is either a file object, or None (indicating an
		error).  In either case, the headers are sent, making the interface 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())
		displaypath = cgi.escape(urllib.parse.unquote(self.path))

		f = ('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">') +\
			('<html><head>') +\
			('<meta http-equiv="Content-Type" content="text/html; charset=utf-8">') +\
			('<title>Directory listing for %s</title>' % displaypath) +\
			('</head><body>') +\
			('<h1>Directory listing for %s</h1>' % displaypath) +\
			('<form ENCTYPE="multipart/form-data" method="post">') +\
			('<input name="file" type="file" multiple="multiple"/>') +\
			('<input type="submit" value="upload"/></form>') +\
			('<hr><ul>')

		for name in list:
			fullname = os.path.join(path, name)
			displayname = linkname = name
			# Append / for directories or @ for symbolic links
			if 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 = f + ('<li><a href="%s">%s</a>' % (urllib.parse.quote(linkname), cgi.escape(displayname)))
		f = f + ("</ul><hr></body></html>")

		f = f.encode('utf-8')
		length = len(f)
		self.send_response(200)
		self.send_header("Content-type", "text/html")
		self.send_header("Content-Length", str(length))
		self.end_headers()
		return f

	def translate_path(self, path):
		"""Translate a /-separated PATH to the local filename syntax. Components that mean special things to the local file system
		(e.g. drive or directory names) are ignored.  (XXX They should probably be diagnosed.)
		"""
		# abandon query parameters
		path = path.split('?',1)[0]
		path = path.split('#',1)[0]
		path = posixpath.normpath(urllib.parse.unquote(path))
		words = path.split('/')
		words = filter(None, words)
		path = os.getcwd()
		for word in words:
			drive, word = os.path.splitdrive(word)
			head, word = os.path.split(word)
			if word in (os.curdir, os.pardir): continue
			path = os.path.join(path, word)
		return path

	def guess_type(self, path):
		"""Guess the type of a file.
		Argument is a PATH (a filename). Return value is a string of the form type/subtype,
		usable for a MIME Content-type header. The default implementation looks the file's extension
		up in the table self.extensions_map, using application/octet-stream as a default; however it
		would be permissible (if slow) to look inside the data to make a better guess.
		"""

		base, ext = posixpath.splitext(path)
		if ext in self.extensions_map:
			return self.extensions_map[ext]
		ext = ext.lower()
		if ext in self.extensions_map:
			return self.extensions_map[ext]
		else:
			return self.extensions_map['']

	if not mimetypes.inited:
		mimetypes.init() # try to read system mime.types
	extensions_map = mimetypes.types_map.copy()
	extensions_map.update({
		'': 'application/octet-stream', # Default
		'.py': 'text/plain',
		'.c': 'text/plain',
		'.h': 'text/plain',
		})


def test(HandlerClass = ResumeHTTPHandler,
		 ServerClass = http.server.HTTPServer):
	http.server.test(HandlerClass, ServerClass, "HTTP/1.1", 8080)

if __name__ == '__main__':
	test()