#THIS IS A WEBSERVER FOR DEMONSTRATING THE TYPES OF RESPONSES WE SEE FROM AN API ENDPOINT from flask import Flask app = Flask(__name__) #GET REQUEST @app.route('/readHello') def getRequestHello(): return "Hi, I got your GET Request!" #POST REQUEST @app.route('/createHello', methods = ['POST']) def postRequestHello(): return "I see you sent a POST message :-)" #UPDATE REQUEST @app.route('/updateHello', methods = ['PUT']) def updateRequestHello(): return "Sending Hello on an PUT request!" #DELETE REQUEST @app.route('/deleteHello', methods = ['DELETE']) def deleteRequestHello(): return "Deleting your hard drive.....haha just kidding! I received a DELETE request!" if __name__ == '__main__': app.debug = True app.run(host='0.0.0.0', port=5000)
Category: Python
parsing
>>> import urllib2 >>> import urllib >>> p = urllib2.urlopen("http://www.google.com") >>> p> >>> c = p.read() >>> dir(p) ['__doc__', '__init__', '__iter__', '__module__', '__repr__', 'close', 'code', 'fileno', 'fp', 'getcode', 'geturl', 'headers', 'info', 'msg', 'next', 'read', 'readline', 'readlines', 'url'] >>> p.url 'http://www.google.co.jp/?gfe_rd=cr&ei=MtZkWNDXDYSL8QeD46cY' >>> p.headers >>> p.headers.items() [('x-xss-protection', '1; mode=block'), ('set-cookie', 'NID=93=O65u9flBWzM92U9MzcezfIXaeG9itO-ala3ogt6T7fipovY5ily4QBNUxbUbsVga_hYeJEKWDq891mFaPgZm2Ya_1gvUZm37K2pNfFpOUVxCptVtOSAn3OXvUHCzKBaC; expires=Fri, 30-Jun-2017 09:24:02 GMT; path=/; domain=.google.co.jp; HttpOnly'), ('accept-ranges', 'none'), ('expires', '-1'), ('vary', 'Accept-Encoding'), ('server', 'gws'), ('connection', 'close'), ('cache-control', 'private, max-age=0'), ('date', 'Thu, 29 Dec 2016 09:24:02 GMT'), ('p3p', 'CP="This is not a P3P policy! See https://www.google.com/support/accounts/answer/151657?hl=en for more info."'), ('content-type', 'text/html; charset=Shift_JIS'), ('x-frame-options', 'SAMEORIGIN')] >>> p.headers['content-type'] 'text/html; charset=Shift_JIS'
>>> s = = urllib2.urlopen("http://www.example.com") SyntaxError: invalid syntax >>> s = urllib2.urlopen("http://www.example.com") >>> s.url 'http://www.example.com' >>> s.headers.items() [('content-length', '1270'), ('x-ec-custom-error', '1'), ('x-cache', 'HIT'), ('expires', 'Thu, 05 Jan 2017 09:28:12 GMT'), ('vary', 'Accept-Encoding'), ('server', 'ECS (rhv/818F)'), ('last-modified', 'Fri, 09 Aug 2013 23:54:35 GMT'), ('connection', 'close'), ('etag', '"359670651+gzip+ident"'), ('cache-control', 'max-age=604800'), ('date', 'Thu, 29 Dec 2016 09:28:12 GMT'), ('content-type', 'text/html')]
parsing xml
from xml.com import minidom
json
>>> import json >>> j = '{"one": 1, "numbers": [1,2,3.5]}' >>> json.loads(j) {u'numbers': [1, 2, 3.5], u'one': 1}
def total_ups(): j = json.loads(reddit_front) sum(c['data']['ups'] for c in j['data']['children'])
host ip info
host ip info
IP_URL = "http://api.hostip.info/?ip=" def get_coords(ip): url = IP_URL + ip content = None content = urllib2.urlopen(url).read() except URLError: return if content: d = minidom.parseString(content) coords = d.getElementByTagName("gml:coordinates") if coords and coords[0].childNodes[0].nodeValue: lon, lat = coords[0].childNodes[0].nodeValue.split(',') return db.GetPt(lat, lon)
Gmap
GMAPS_URL = "" def gmap_img(points): markers = '&'.join('makers=%s,%s' % (p.lat, p.lon) for p in points) return GMAPS_URL + markers print gmaps_img([Point])
Querying
from collections import namedtuple # make a basic Link class Link = namedtuple('Link', ['id', 'submitter_id', 'submitted_time', 'votes', 'title', 'url']) # list of Links to work with links = [ Link(0, 60398, 1334014208.0, 109, "C overtakes Java as the No. 1 programming language in the TIOBE index.", "http://pixelstech.net/article/index.php?id=1333969280"), Link(1, 60254, 1333962645.0, 891, "This explains why technical books are all ridiculously thick and overpriced", "http://prog21.dadgum.com/65.html"), Link(23, 62945, 1333894106.0, 351, "Learn Haskell Fast and Hard", "http://yannesposito.com/Scratch/en/blog/Haskell-the-Hard-Way/"), Link(2, 6084, 1333996166.0, 81, "Announcing Yesod 1.0- a robust, developer friendly, high performance web framework for Haskell", "http://www.yesodweb.com/blog/2012/04/announcing-yesod-1-0"), Link(3, 30305, 1333968061.0, 270, "TIL about the Lisp Curse", "http://www.winestockwebdesign.com/Essays/Lisp_Curse.html"), Link(4, 59008, 1334016506.0, 19, "The Downfall of Imperative Programming. Functional Programming and the Multicore Revolution", "http://fpcomplete.com/the-downfall-of-imperative-programming/"), Link(5, 8712, 1333993676.0, 26, "Open Source - Twitter Stock Market Game - ", "http://www.twitstreet.com/"), Link(6, 48626, 1333975127.0, 63, "First look: Qt 5 makes JavaScript a first-class citizen for app development", "http://arstechnica.com/business/news/2012/04/an-in-depth-look-at-qt-5-making-javascript-a-first-class-citizen-for-native-cross-platform-developme.ars"), Link(7, 30172, 1334017294.0, 5, "Benchmark of Dictionary Structures", "http://lh3lh3.users.sourceforge.net/udb.shtml"), Link(8, 678, 1334014446.0, 7, "If It's Not on Prod, It Doesn't Count: The Value of Frequent Releases", "http://bits.shutterstock.com/?p=165"), Link(9, 29168, 1334006443.0, 18, "Language proposal: dave", "http://davelang.github.com/"), Link(17, 48626, 1334020271.0, 1, "LispNYC and EmacsNYC meetup Tuesday Night: Large Scale Development with Elisp ", "http://www.meetup.com/LispNYC/events/47373722/"), Link(101, 62443, 1334018620.0, 4, "research!rsc: Zip Files All The Way Down", "http://research.swtch.com/zip"), Link(12, 10262, 1334018169.0, 5, "The Tyranny of the Diff", "http://michaelfeathers.typepad.com/michael_feathers_blog/2012/04/the-tyranny-of-the-diff.html"), Link(13, 20831, 1333996529.0, 14, "Understanding NIO.2 File Channels in Java 7", "http://java.dzone.com/articles/understanding-nio2-file"), Link(15, 62443, 1333900877.0, 1244, "Why vector icons don't work", "http://www.pushing-pixels.org/2011/11/04/about-those-vector-icons.html"), Link(14, 30650, 1334013659.0, 3, "Python - Getting Data Into Graphite - Code Examples", "http://coreygoldberg.blogspot.com/2012/04/python-getting-data-into-graphite-code.html"), Link(16, 15330, 1333985877.0, 9, "Mozilla: The Web as the Platform and The Kilimanjaro Event", "https://groups.google.com/forum/?fromgroups#!topic/mozilla.dev.planning/Y9v46wFeejA"), Link(18, 62443, 1333939389.0, 104, "github is making me feel stupid(er)", "http://www.serpentine.com/blog/2012/04/08/github-is-making-me-feel-stupider/"), Link(19, 6937, 1333949857.0, 39, "BitC Retrospective: The Issues with Type Classes", "http://www.bitc-lang.org/pipermail/bitc-dev/2012-April/003315.html"), Link(20, 51067, 1333974585.0, 14, "Object Oriented C: Class-like Structures", "http://cecilsunkure.blogspot.com/2012/04/object-oriented-c-class-like-structures.html"), Link(10, 23944, 1333943632.0, 188, "The LOVE game framework version 0.8.0 has been released - with GLSL shader support!", "https://love2d.org/forums/viewtopic.php?f=3&t=8750"), Link(22, 39191, 1334005674.0, 11, "An open letter to language designers: Please kill your sacred cows. (megarant)", "http://joshondesign.com/2012/03/09/open-letter-language-designers"), Link(21, 3777, 1333996565.0, 2, "Developers guide to Garage48 hackatron", "http://martingryner.com/developers-guide-to-garage48-hackatron/"), Link(24, 48626, 1333934004.0, 17, "An R programmer looks at Julia", "http://www.r-bloggers.com/an-r-programmer-looks-at-julia/")] # links is a list of Link objects. Links have a handful of properties. For # example, a Link's number of votes can be accessed by link.votes if "link" is a # Link. # make the function query() return the number of votes for the link whose ID is # 15 def query(): submissions = [] for l in links: if submitter_id = 62443: submissions.append(l) submissions.sort(key = lambda x: x.submitted_time) return submissions print query()
template
import os import webapp2 form_html = """ <form> <h2>Add a Food</h2> <input type="text" name="food"> %s <button>Add</button> </form> """ hidden_html = """ <input type="hidden" name="food" value="%s"> """ shopping_list_html = """ <br> <br> <h2>Shopping List</h2> <ul> %s </ul> """ class Handler(webapp2.RequestHandler): def write(self, *a, **kw): self.response.out.write(*a, **kw) class MainPage(Handler): def get(self): output = form_html hidden_html = "" items = self.request.get_all("food") if items: output_items = "" for item in items: output_hidden += hidden_html % item output_items += item_html % item output_shopping = shopping_list_html % output_items output += output_shopping output = output % output_hidden self.write(output) app = webapp2.WSGIApplication([('/', MainPage), ], debug=True)
application:template-lesson version: 1 runtime: python27 api_version: 1 threadsafe: True handlers: - url: /.* script: templates.app
python template
<!DOCTYPE html> <html> <head> <title>templates!</title> </head> <body style="margin: 0"> <h1 style="background-color: #ddd: color: #888; margin: 0, height: 50px"> Templates </h1> {% block content %} {% endblock %} </body> </html>
{% extends "base.html" %} {% block content %} <form> <h2>Add a Food</h2> <input type="text" name="food"> {% if items %} {% for item in items %} <input type="hidden" name="food" value="{{item}}"> {% endfor %} <button>Add</button> {% if items %} <br> <br> <h2>Shopping List</h2> <ul> {% for item in items %} <li>{{ item | escape }}</li> </ul> {% endif %} </form> {% endblock %}
rot13
if ‘A’ <= c and c <= 'Z': return chr((ord(c) - ord('A') + 13) % 26 + ord('A')) if 'a' <= c and c <= 'Z': return chr((ord(c) - ord('a') + 13) % 26 + ord('a')) return c
def render_str(template, **params): t = jinja_env.get_template(template) return t.render(params) class BaseHandler(webapp2.RequestHandler): def render(self, template, **kw): self.response.out.write(render_str(template, **kw)) def write(self, *a, **kw): self.response.out.write(*a, **kw) class Rot13(BaseHandler): def get(self): self.render('rot13-form.html') def post(self) rot13 = '' text = self.request.get('text') if text: rot13 = text.encode('rot13') self.render('rot13-form.html', text = rot13) USER_RE = re.compile(r"^[a-zA-Z0-9_-]{3,20}$") def valid_username(username): return username and USER_RE.match(username) PASS_RE = re.compile(r"^.{3,20}$") def valid_password(password):
python %s
replaced by given string.
given_string = "I think %s is a perfectly normal thing to do in public." def sub1(s): return given_string % s
given_string2 = "I think %s and %s are perfectly normal things to do in public." def sub2(s1, s2): return given_string2 % (s1, s2)
string substitution
given_string2 = "I'm %(nickname)s. My real name is %(name)s, but my friends call me %(nickname)s." def sub_m(name, nickname): return given_string2 % {"nickname": nickname, "name" : name} print sub_m("Mike", "Goose")
replacement
def escape_html(s): for (i, o) in (("&", "&"), (">", ">"), ("<", "<"), ('"', ""e;")): s = s.replace(i, o) return s print escape_html('>')
import cgi def escape_html(s): return cgi.escape(s, quote = True) print escape_html('"hello, & = &"')
validation
str.capitalize(): returns a copy of the string with only its first character capitalized.
months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] def valid_month(month): if month: cap_month = month.capitalize() if cap_month in months: return cap_month
use dictionary to restrict only three character.
month_abbvs = dic((m[:3].lower(), m) for m in months) def valid_month(month): if month: short_month = month[:3].lower() return month_abbvs.get(short_month)
checking day
def valid_day(day): if day and day.isdigit(): day = int(day) if day > 0 and <= 31: return day
telnet
[vagrant@localhost]$ sudo yum -y install telnet Trying 35.160.185.106... Connected to www.udacity.com. Escape character is '^]'. GET / HTTP/1.0 Host: www.example.com HTTP/1.1 302 Found Cache-Control: no-cache Location: https://www.example.com/ Content-Length: 0 Connection: Close
input form
<form action="http://www.google.com/search"> <input name="q"> <input type="submit"> </form>
play.py
import webapp2 class MainPage(webapp2.RequestHandler): def get(self): self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, webapp World!') app = webapp2.WSGIApplication([('/', MainPage)], debug=True)
ダブルクォーテーション3つでくくると、複数行に渡る文字列を記述することができる。
import webapp2 form=""" <form action="http://www.google.com/search"> <input name="q"> <input type="submit"> </form> """ class MainPage(webapp2.RequestHandler): def get(self): #self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, webapp World!') app = webapp2.WSGIApplication([('/', MainPage)], debug=True)
form parameter
<form> <input type="radio" name="q" value="one"> <input type="radio" name="q" value="two"> <input type="radio" name="q" value="third"> <br> <input type="submit"> </form>
<form> <label> one <input typ\e="radio" name="q" value="one"> </label> <label> two <input type="radio" name="q" value="two"> </label> <label> three <input type="radio" name="q" value="third"> </label> <br> <input type="submit"> </form>
select
<form> <select name="q"> <option value="1">the number one</option> <option>two</option> <option>three</option> </select> <br> <input type="submit"> </form>
User validation
import webapp2 form=""" <form method="post"> What is your birthday? <br> <label>Month <input type="text" name="month"> </label> <label>Day <input type="text" name="day"> </label> <label>Year <input type="text" name="year"> </label> <br> <br> <input type="submit"> </form> """ class MainPage(webapp2.RequestHandler): def get(self): self.response.out.write(form) def post(self): self.response.out.write("Thanks! That's a totally valid day!") app = webapp2.WSGIApplication([('/', MainPage),('/testform', TestHandler)], debug=True)
Run python server
shell command
python -m http.server 8000
write with canvas
<!DOCTYPE html> <html> <head> </head> <body> <canvas id="c" width="500" height="500"></canvas> <script> var c = document.querySelector("#c"); var ctx = c.getContext("2d"); ctx.fillRect(100, 100, 100, 100); ctx.strokeRect(50, 50, 50, 50); </script> </body> </head> </html>
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer class WebServerHandler(BaseHTTPRequestHandler): def do_GET(self): if self.path.endswith("/hello"): self.send_response(200) self.send_header('Content-type', 'text/html') self.end_headers() message = "" message += "<html><body>Hello!</body></html>" self.wfile.write(message) print message return if self.path.endswith("/hola"): self.send_response(200) self.send_header('Content-type', 'text/html') self.end_headers() message = "" message += "<html><body> ¡ Hola ! <a href='/hello'>back to hello</a></body></html>" self.wfile.write(message) print message return else: self.send_error(404, 'File Not Found: %s' % self.path) def main(): try: port = 8080 server = HTTPServer(('', port), WebServerHandler) print "Web Server running on port %s" % port server.serve_forever() except KeyboardInterrupt: print " ^C entered, stopping web server...." server.socket.close() if __name__ == '__main__': main()
from flask import Flask app = Flask(__name__) @app.route('/') @app.route('/hello') def HelloWorld(): return "Hello World" if __name__ == '__main__': app.debug = True app.run(host='0.0.0.0', port=5000)
create own webserver
from http.server import BaseHTTPRequestHandler, HTTPServer class webserverHandler(BaseHTTPRequestHandler): def do_GET(self): try: if self.path.endswith("/hello"): self.send_response(200) self.send_header('Content-type', 'text/html') self.end_headers() output = "" output += "<html><body>Hello!</body></html>" self.wfile.write(output) print(output) return except IOError: self.send_error(404, "File Not Found %s" % self.path) def main(): try: port = 8080 server = HTTPServer(('',port), webserverHandler) print("Web server running on port %s" % port) server.serve_forever() except keyboardInterrupt: print("^C entered, stopping web server...") server.socket.close() if __name__ == '__main__': main()