Udacity-Homework/rot13.py at master · Kaijun/Udacity-Homework · GitHub

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import webapp2
import cgi


#
#
# It's the homework of Udacity CS253 Unit 2 : Rot13
#
#

rot13_form="""
<center>
<div id="div1" style="height:1000px;width:1000px">
<form method = "post">
<br>
<div align="left">
<font size = "5"><b>My Rot13 Transform:</b></font> <br><br>
<a href="http://en.wikipedia.org/wiki/ROT13">What's Rot13</a>
<br><br>

<textarea cols="65" rows="20"  name="text">%(fill)s</textarea>
<br>
<input type = "submit" value="Submit">

</form>
</div>
</div>
</center>

"""

class Rot13(webapp2.RequestHandler):
	def escape_html(self, s):
		return cgi.escape(s, quote = True)

	def trans(self, str_in):
		i = 0
		listtt = list(str_in)

		for x in listtt:
			x = ord(x)
			if x>=65 and x<=77:
				listtt[i] = x+13
			elif x>=78 and x<=90:
				listtt[i] = x-13
			elif x>=97 and x<=109:
				listtt[i] = x+13
			elif x>=110 and x<=122:
				listtt[i] = x-13
			else :
				listtt[i] = x
			i=i+1

		i=0
		for x in listtt:
			x = chr(x)
			listtt[i] = x
			i = i + 1
		str_in = ''.join(listtt)

		return str_in


	def write_form(self, f=""):
		self.response.out.write(rot13_form % {"fill": f})

	def get(self):
		self.write_form()

	def post(self):
		text_trans = self.request.get('text')

		if text_trans:
			text_trans = self.trans(text_trans)
			text_trans = self.escape_html(text_trans)
			self.write_form(text_trans)

		else:
			self.response.out.write("Please input the text")


#
#
#       END!
#
#