dynamically generating HTML divs/JS scripts with Python/GAE - google-app-engine

I am building a webapp and I would like to be able to dynamically render out divs/scripts in my index.html given certain conditions. An abstraction of what I would like to do is the following:
class MainHandler(webapp2.RequestHandler):
def get(self, q):
script = "<script>function display_alert(){ {alert('Hello world!'}}</script> <div>hello world</div>"
if q is None:
q = 'index.html'
path = os.path.join (os.path.dirname (__file__), q)
self.response.headers ['Content-Type'] = 'text/html'
self.response.write (template.render (path, {
"script" : script
}))
def main ():
application = webapp.WSGIApplication ([('/(.*html)?', MainHandler)], debug=True)
util.run_wsgi_app (application)
if __name__ == '__main__':
main ()
The HTML is a simple index.html file that contains {{script}}. When it renders out, it looks like this:
Why isn't the HTML rendering what I gave it correctly? I tried running the "script" variable through simplejson.dumps, it didn't work either.

I believe Html is escaped by default in django templates
in django this is accomplished with the safe template filter
{{ script|safe }}
are you using django to render your templates? or a different engine?

Related

Is there a way to explicitly set MIME types for Starlette/Uvicorn?

It appears that my simple Starlette/Uvicorn web app is serving up incorrect MIME content type for Jinja templated (served from the same server) JavaScript files. As you can see from the screen shot the uvicorn server is casting the *.js file as type (“text/plain”).
Screenshot
I have scoured the documents for both Starlette and Uvicorn and am simply stumped.
My simple web app is as follows:
from starlette.applications import Starlette
from starlette.staticfiles import StaticFiles
from starlette.responses import HTMLResponse
from starlette.templating import Jinja2Templates
from starlette.middleware.cors import CORSMiddleware
import uvicorn
from random import randint
port = randint(49152,65535)
templates = Jinja2Templates(directory='templates')
app = Starlette(debug=True)
app.mount('/static', StaticFiles(directory='statics', html=True), name='static')
app.add_middleware(
CORSMiddleware, allow_origins=["*"], allow_headers=["*"], allow_methods=["*"]
)
#app.route('/')
async def homepage(request):
template = "index.html"
context = {"request": request}
return templates.TemplateResponse(template, context, media_type='text/html')
#app.route('/error')
async def error(request):
"""
An example error. Switch the `debug` setting to see either tracebacks or 500 pages.
"""
raise RuntimeError("Oh no")
#app.exception_handler(404)
async def not_found(request, exc):
"""
Return an HTTP 404 page.
"""
template = "404.html"
context = {"request": request}
return templates.TemplateResponse(template, context, status_code=404)
#app.exception_handler(500)
async def server_error(request, exc):
"""
Return an HTTP 500 page.
"""
template = "500.html"
context = {"request": request}
return templates.TemplateResponse(template, context, status_code=500)
if __name__ == "__main__":
uvicorn.run("app-567:app", host='0.0.0.0', port=port, log_level="info", http='h11', loop='asyncio', reload=True)
The JavaScript files that are loaded in the head give the same error but load nonetheless. This is a bi-product of the new 'nosniff' default setting in Firefox (73.0 64-bit). The scripts that are loaded as module imports fail outright.
I am running Windows 10 (x64), Python 3.7, uvicorn 0.11.2, and starlette 0.13.1.
Any help is greatly appreciated.
Thank you in advance.
I was able to fix this issue by explicitly setting the mimetypes variables as follows:
from starlette.applications import Starlette
from starlette.staticfiles import StaticFiles
from starlette.responses import HTMLResponse
from starlette.templating import Jinja2Templates
from starlette.middleware.cors import CORSMiddleware
import uvicorn
from random import randint
import mimetypes
mimetypes.init()
port = randint(49152,65535)
templates = Jinja2Templates(directory='templates')
app = Starlette(debug=True)
app.mount('/static', StaticFiles(directory='statics', html=True), name='static')
app.add_middleware(
CORSMiddleware, allow_origins=["*"], allow_headers=["*"], allow_methods=["*"]
)
#app.route('/')
async def homepage(request):
mimetypes.add_type('application/javascript', '.js')
mimetypes.add_type('text/css', '.css')
mimetypes.add_type('image/svg+xml', '.svg')
template = "index.html"
context = {"request": request}
return templates.TemplateResponse(template, context, media_type='text/html')
#app.route('/error')
async def error(request):
"""
An example error. Switch the `debug` setting to see either tracebacks or 500 pages.
"""
raise RuntimeError("Oh no")
#app.exception_handler(404)
async def not_found(request, exc):
"""
Return an HTTP 404 page.
"""
template = "404.html"
context = {"request": request}
return templates.TemplateResponse(template, context, status_code=404)
#app.exception_handler(500)
async def server_error(request, exc):
"""
Return an HTTP 500 page.
"""
template = "500.html"
context = {"request": request}
return templates.TemplateResponse(template, context, status_code=500)
if __name__ == "__main__":
uvicorn.run("app-567:app", host='0.0.0.0', port=port, log_level="info", http='h11', loop='asyncio', reload=True)

How can I 301 redirect a page URL on Google App Engine?

I am updating the file structure of my hand coded static site, as I originally created it a while back when I had less of an appreciation of best practices for file structure in web development.
I am aware that for best user experience, as well as optimal SEO purposes, redirects should be used minimally.
I have searched Stack Overflow and Google in general for a solution for setting up 301 redirects for individual static page URL's on Google App Engine (GAE), however I only seem to be able to find entire domain name redirect explinations.
The site is hand coded in html, css and js with Bootstrap v3.3.7 integrated for mobile responsiveness.
The site is hosted on Google App Engine and is a subdomain of .appspot.com (http://christopher-john-roberts.appspot.com).
I will be for example moving the following page:
http://christopher-john-roberts.appspot.com/content/scientific-skills/mres-post-genomic-science.html
to the new URL:
http://christopher-john-roberts.appspot.com/scientific-skills/mres-post-genomic-science.html
still under http://christopher-john-roberts.appspot.com/
My app.yaml is as follows:
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /
static_files: www/index.html
upload: www/index.html
- url: /(.*)
static_files: www/\1
upload: www/(.*)
My main.py file is as follows:
import os
from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
from google.appengine.ext.webapp import template
class MainHandler(webapp.RequestHandler):
def get (self, q):
if q is None:
q = 'index.html'
path = os.path.join (os.path.dirname (__file__), q)
self.response.headers ['Content-Type'] = 'text/html'
self.response.out.write (template.render (path, {}))
def main ():
application = webapp.WSGIApplication ([('/(.*html)?', MainHandler)], debug=True)
util.run_wsgi_app (application)
if __name__ == '__main__':
main ()
If scripting is required I would prefer to implement a python solution as that is the current deployment on GAE.
Don't hesitate to ask if I have missed out any vital information.
Thanks in advance for your response.
UPDATE
I have now tried editing my main.py file to introduce a self.redirect as follows:
import os
from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
from google.appengine.ext.webapp import template
class MainHandler(webapp.RequestHandler):
def get (self, q):
if q is None:
q = 'index.html'
if q = 'content/scientific-skills/mres-post-genomic-science.html':
redirect_url = 'http://christopher-john-roberts.appspot.com/scientific-skills/mres-post-genomic-science.html'
self.redirect(redirect_url, permanent=True)
path = os.path.join (os.path.dirname (__file__), q)
self.response.headers ['Content-Type'] = 'text/html'
self.response.out.write (template.render (path, {}))
def main ():
application = webapp.WSGIApplication ([('/(.*html)?', MainHandler)], debug=True)
util.run_wsgi_app (application)
if __name__ == '__main__':
main ()
However this did not work. When visiting the url http://www.christopher-john-roberts.appspot.com/content/scientific-skills/mres-post-genomic-science.html I am not redirected and instead get Error: Not Found
The requested URL /content/scientific-skills/mres-post-genomic-science.html was not found on this server.
I have also tried:
import os
from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
from google.appengine.ext.webapp import template
class MainHandler(webapp.RequestHandler):
def get (self, q):
if q is None:
q = 'index.html'
path = os.path.join (os.path.dirname (__file__), q)
self.response.headers ['Content-Type'] = 'text/html'
self.response.out.write (template.render (path, {}))
if q = 'content/scientific-skills/mres-post-genomic-science.html':
redirect_url = 'http://christopher-john-roberts.appspot.com/scientific-skills/mres-post-genomic-science.html'
self.redirect(redirect_url, permanent=True)
def main ():
application = webapp.WSGIApplication ([('/(.*html)?', MainHandler)], debug=True)
util.run_wsgi_app (application)
if __name__ == '__main__':
main ()
As well as ...
import os
from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
from google.appengine.ext.webapp import template
class MainHandler(webapp.RequestHandler):
def get (self, q):
if q is None:
q = 'index.html'
if q = 'content/scientific-skills/mres-post-genomic-science.html':
redirect_url = 'scientific-skills/mres-post-genomic-science.html'
self.redirect(redirect_url, permanent=True)
path = os.path.join (os.path.dirname (__file__), q)
self.response.headers ['Content-Type'] = 'text/html'
self.response.out.write (template.render (path, {}))
def main ():
application = webapp.WSGIApplication ([('/(.*html)?', MainHandler)], debug=True)
util.run_wsgi_app (application)
if __name__ == '__main__':
main ()
UPDATE 2
I have provided a screenshot below of my current main.py file:
screenshot of main.py file
UPDATE 3
My latest main.py file:
latest screenshot of main.py
The logs:
screenshot of logs
There is a self.redirect built right into webapp. Add this to your def get(self, q):
logging.info(q)
if q == 'content/scientific-skills/mres-post-genomic-science.html':
redirect_url = 'http://christopher-john-roberts.appspot.com/scientific-skills/mres-post-genomic-science.html'
self.redirect(redirect_url, permanent=True)

GAE upload image then dynamically serve the image

I'm trying to make a simple app on GAE that allows a user to enter a url to an image and a name. The app then uploads this image to the Datastore along with its name.
After the upload the page self redirects and then should send the image back to the client and display it on their machine.
After running all I get is a Server error. Since I am new to GAE please could someone tell me if my code is at least correct.
I can't see what is wrong with my code. (I have checked for correct indentation and whitespace). Below is the code:
The python:
import jinja2 # html template libary
import os
jinja_environment = jinja2.Environment(
loader=jinja2.FileSystemLoader(os.path.dirname(__file__)))
import urllib
import urllib2
import webapp2
from google.appengine.ext import db
from google.appengine.api import urlfetch
class Default_tiles(db.Model):
name = db.StringProperty()
image = db.BlobProperty(default=None)
class MainPage(webapp2.RequestHandler):
def get(self):
template = jinja_environment.get_template('index.html')
self.response.out.write(template.render())
class Upload(webapp2.RequestHandler):
def post(self):
# get information from form post upload
image_url = self.request.get('image_url')
image_name = self.request.get('image_name')
# create database entry for uploaded image
default_tile = Default_tiles()
default_tile.name = image_name
default_tile.image = db.Blob(urlfetch.Fetch(image_url).content)
default_tile.put()
self.redirect('/?' + urllib.urlencode({'image_name': image_name}))
class Get_default_tile(webapp.RequestHandler):
def get(self):
name = self.request.get('image_name')
default_tile = get_default_tile(name)
self.response.headers['Content-Type'] = "image/png"
self.response.out.write(default_tile.image)
def get_default_tile(name):
result = db.GqlQuery("SELECT * FROM Default_tiles WHERE name = :1 LIMIT 1", name).fetch(1)
if (len(result) > 0):
return result[0]
else:
return None
app = webapp2.WSGIApplication([('/', MainPage),
('/upload', Upload),
('/default_tile_img', Get_default_tile)],
debug=True)
The HTML:
<html>
<head>
<link type="text/css" rel="stylesheet" href="/stylesheets/main.css" />
</head>
<body>
<form action="/upload" method="post">
<div>
<p>Name: </p>
<input name="image_name">
</div>
<div>
<p>URL: </p>
<input name="image_url">
</div>
<div><input type="submit" value="Upload Image"></div>
</form>
<img src="default_tile_img?{{ image_name }}">
</body>
</html>
Any help at all will be so much appreciated. Thanks you!
UPDATE
Thanks to Greg, I know know how to view error logs. As Greg said I was missing a comma, I have updated the code above.
The app now runs, but when I upload an image, no image shows on return. I get the following message in the log:
File "/Users/jamiefearon/Desktop/Development/My Programs/GAE Fully functional website with css, javascript and images/mywebsite.py", line 53, in get
default_tile = self.get_default_tile(name)
TypeError: get_default_tile() takes exactly 1 argument (2 given)
I only passed one argument to get_default_tile() why does it complain that I passed two?
You're missing a comma after ('/upload', Upload) in the WSGIApplication setup.
use this python code
import jinja2 # html template libary
import os
jinja_environment = jinja2.Environment(
loader=jinja2.FileSystemLoader(os.path.dirname(__file__)))
import urllib
import urllib2
import webapp2
from google.appengine.ext import db
from google.appengine.api import urlfetch
class Default_tiles(db.Model):
name = db.StringProperty()
image = db.BlobProperty(default=None)
class MainPage(webapp2.RequestHandler):
def get(self):
template = jinja_environment.get_template('index.html')
self.response.out.write(template.render())
class Upload(webapp2.RequestHandler):
def post(self):
# get information from form post upload
image_url = self.request.get('image_url')
image_name = self.request.get('image_name')
# create database entry for uploaded image
default_tile = Default_tiles()
default_tile.name = image_name
default_tile.image = db.Blob(urlfetch.Fetch(image_url).content)
default_tile.put()
self.redirect('/?' + urllib.urlencode({'image_name': image_name}))
class Get_default_tile(webapp2.RequestHandler):
def get_default_tile(self, name):
result = db.GqlQuery("SELECT * FROM Default_tiles WHERE name = :1 LIMIT 1", name).fetch(1)
if (len(result) > 0):
return result[0]
else:
return None
def get(self):
name = self.request.get('image_name')
default_tile = self.get_default_tile(name)
self.response.headers['Content-Type'] = "image/png"
self.response.out.write(default_tile)
app = webapp2.WSGIApplication([('/', MainPage),
('/upload', Upload),
('/default_tile_img', Get_default_tile)],
debug=True)

Integrating Chat with (webapp2 + python 2.7 + Jinja2)

I'm trying to add chat to my site and am integrating some code with my existing code. The chat app works fine on its own when it's all set up in the original main.app file. But when I try to move that same code to a handlers.py file and then setup up routes in routes.py I get errors saying template variables are undefined. Are the two different codes conflicting in the way they render templates? They seem to be using webapp2 differently, i.e. my code renders templates like this:
self.render_template('secure_zone.html', **params)
And the chat app like this:
self.response.out.write(render("main.html",
username=username,
usernameerror=usernameerror,
channel=channelname,
channelerror=channelerror))
Are both acceptable?
Here's my handlers.py file:
Routes are setup in routes.py and added in main.py
"""
import httpagentparser
from boilerplate import models
from boilerplate.lib.basehandler import BaseHandler
from boilerplate.lib.basehandler import user_required
class SecureRequestHandler(BaseHandler):
"""
Only accessible to users that are logged in
"""
#user_required
def get(self, **kwargs):
user_session = self.user
user_session_object = self.auth.store.get_session(self.request)
user_info = models.User.get_by_id(long( self.user_id ))
user_info_object = self.auth.store.user_model.get_by_auth_token(
user_session['user_id'], user_session['token'])
try:
params = {
"user_session" : user_session,
"user_session_object" : user_session_object,
"user_info" : user_info,
"user_info_object" : user_info_object,
"userinfo_logout-url" : self.auth_config['logout_url'],
}
return self.render_template('secure_zone.html', **params)
except (AttributeError, KeyError), e:
return "Secure zone error:" + " %s." % e
Here's the main.py file for the chat app:
import os
import hashlib
import urllib
import logging
import re
import json
import webapp2
import jinja2
from google.appengine.api import channel as channel_api # 'channel' is kind of ambiguous in context
from google.appengine.ext import db
from google.appengine.api import memcache
# This section will eventually get moved to a Handler class
template_dir = os.path.join(
os.path.dirname(__file__), 'templates')
jinja_env = jinja2.Environment(
loader = jinja2.FileSystemLoader(template_dir),
autoescape = True)
def render_str(template, **params):
'''Returns a string of the rendered template'''
t = jinja_env.get_template(template)
return t.render(params)
def render(template, **kw):
'''Render using the template and parameters'''
return(render_str(template, **kw))
# End Handler
class Main(webapp2.RequestHandler):
def get(self):
'''Show connection page'''
return self.render_template("main.html", channel="#udacity")
def post(self):
'''Displays chat UI'''
username = self.request.get('username')
channelname = self.request.get('channel')
usernameerror = ""
if not username:
usernameerror="Please enter a username"
elif not re.compile(r'^[a-zA-Z0-9_-]{3,20}$').match(username):
usernameerror = "Username must consist of 3-20 alphanumeric characters."
elif get_user(username):
usernameerror="Username already in use"
channelerror = ""
if channelname and not re.compile(r'^#[\w]{3,20}$').match(channelname):
channelerror="Channel must consist of 3-20 alpha_numeric characters and start with a #"
if len(usernameerror+channelerror) > 0:
self.response.out.write(render("main.html",
username=username,
usernameerror=usernameerror,
channel=channelname,
channelerror=channelerror))
app = webapp2.WSGIApplication([
('/', Main),
('/communication', Communication),
('/_ah/channel/connected/?', Connect),
('/_ah/channel/disconnected/?', Disconnect)
], debug=True)
The specific error you posted in the comments "Error: 'Main' object has no attribute 'render_template'" is because in your Main handler, you try to return self.render_template. You should be just calling the function like this:
render_template("main.html", channel="#udacity")
Please note that I did not check the rest of your code, so if you run into any other issues, please post the specific errors you get.
It is because your webapp2.RequestHandler do not have the corresponding function "render_template"
you can use a BaseHandler with render_template function added to achieve the template rendering
from google.appengine.ext.webapp import template
class BaseHandler(webapp2.RequestHandler):
def render_template(self, filename, **template_args):
path = os.path.join(os.path.dirname(__file__), 'templates', filename)
self.response.write(template.render(path, template_args))
class Main(BaseHandler):
def get(self):
'''Show connection page'''
return self.render_template("main.html", channel="#udacity")
ref: http://blog.notdot.net/2011/11/Migrating-to-Python-2-7-part-2-Webapp-and-templates
I just started using webapp2 + python 2.7 + Jinja2 few days, and that is the same problem I encountered.
Hope this solution can help you ;)

User Accounts with (Python 2.7 + Webapp2 + Google App Engine + Jinja + NDB + WTForms)

I have been racking my brain for weeks trying to get this authentication module to work under the webapp2 framework using Jinja, NDB and WTForms. I've looked online everywhere and have reached my breaking point and need to reach out to somebody for help. I've been following this tutorial (which is pretty thorough but I think leaves out some important details, especially for a newbie like me):
User Accounts with Webapp2 + Google App Engine
As far as I know I have everything setup correctly but I continually get a 404 - resources can not be found. What could I be doing wrong? Here is my code...
handlers.py:
import webapp2
import sys
from google.appengine.ext import ndb
sys.modules['ndb'] = ndb
import webapp2_extras.appengine.auth.models as auth_models
from google.appengine.api import users
from webapp2_extras import sessions, auth # we'll use auth later on
from webapp2_extras.auth import InvalidAuthIdError
from webapp2_extras.auth import InvalidPasswordError
from wtforms import Form, TextField, PasswordField, validators
from webapp2_extras.appengine.users import login_required
def jinja2_factory(app):
j = jinja2.Jinja2(app)
j.environment.filters.update({
# Set filters. (http://tinyurl.com/jinja2-factory)
# ...
})
j.environment.globals.update({
# Set global variables.
'uri_for': webapp2.uri_for,
# ...
})
return j
def login_required(handler):
def check_login(self, *args, **kwargs):
if not self.user:
return self.redirect_to('login')
else:
return handler(self, *args, **kwargs)
return check_login
class UserAwareHandler(webapp2.RequestHandler):
def dispatch(self):
try:
super(UserAwareHandler, self).dispatch()
finally:
# Save the session after each request
self.session_store.save_sessions(self.response)
#webapp2.cached_property
def session_store(self):
return sessions.get_store(request=self.request)
#webapp2.cached_property
def session(self):
return self.session_store.get_session(backend="datastore")
#webapp2.cached_property
def auth(self):
return auth.get_auth(request=self.request)
#webapp2.cached_property
def user(self):
user = self.auth.get_user_by_session()
return user
#webapp2.cached_property
def user_model(self):
user_model, timestamp = self.auth.store.user_model.get_by_auth_token(
self.user['user_id'],
self.user['token']) if self.user else (None, None)
return user_model
#webapp2.cached_property
def jinja2(self):
return jinja2.get_jinja2(factory=jinja2_factory, app=self.app)
def render_response(self, _template, **context):
ctx = {'user': self.user_model}
ctx.update(context)
rv = self.jinja2.render_template(_template, **ctx)
self.response.write(rv)
class SignupForm(Form):
email = TextField('Email',
[validators.Required(),
validators.Email()])
password = PasswordField('Password',
[validators.Required(),
validators.EqualTo('confirm_password',
message="Passwords must match.")])
password_confirm = PasswordField('Confirm Password',
[validators.Required()])
class SignupHandler(UserAwareHandler):
#Serves up a signup form, creates new users
def get(self):
self.render_response("templates/signup.html", form=SignupForm())
def post(self):
form = SignupForm(self.request.POST)
error = None
if form.validate():
success, info = self.auth.store.user_model.create_user(
"auth:" + form.email.data,
unique_properties=['email'],
email= form.password.data,
password_raw= form.password.data)
if success:
self.auth.get_user_by_password("auth:"+form.email.data,
form.password.data)
return self.redirect_to("index")
else:
error = "That email is already in use." if 'email'\
in user else "Something has gone horrible wrong."
self.render_response("templates/signup.html", form=form, error=error)
class LoginForm(Form):
email = TextField('Email',
[validators.Required(), validators.Email()])
password = PasswordField('Password',
[validators.Required()])
class LoginHandler(UserAwareHandler):
def get(self):
self.render_response("templates/index.html", form=LoginForm())
def post(self):
form = LoginForm(self.request.POST)
error = None
if form.validate():
try:
self.auth.get_user_by_password(
"auth:"+form.email.data,
form.password.data)
return self.redirect_to('secure')
except (auth.InvalidAuthIdError, auth.InvalidPasswordError):
error = "Invalid Email / Password"
self.render_response("templates/login.html", form=form, error=error)
class LogoutHandler(UserAwareHandler):
#Destroy the user session and return them to the login screen.
#login_required
def get(self):
self.auth.unset_session()
self.redirect_to('login')
class IndexHandler(UserAwareHandler):
def get(self):
ctx = {
'title1': "ALAZA",
'title2': "HOA",
'slogan': "A communication tool for the Alazan HOA.",
'message1': """
<p>The whole idea here is to show how to set up a simple static web site
on Google App Engine. I want to create an easy way to host your modest web
site on App Engine. My approach is dead simple. All I use is some boilerplate
code almost anyone can follow. You can have multiple pages and use template
variable features that are part of App Engine's WebApp Framework. Most modest
web sites don't do much more than this. Your certainly free to expand on what
you find here.</p>""",
}
self.render_response('templates/index.html', **ctx)
main.py:
import webapp2
import config
import routes
import sys
from google.appengine.ext import ndb
sys.modules['ndb'] = ndb
import webapp2_extras.appengine.auth.models as auth_models
class AwesomeUser(auth_models.User):
email = ndb.StringProperty()
webapp2_config = {}
webapp2_config['webapp2_extras.sessions'] = {
'secret_key': 'othello',}
webapp2_config['webapp2_extras.auth'] = {
'user_model': AwesomeUser,}
app = webapp2.WSGIApplication(config=config.webapp2_config)
routes.add_routes(app)
routes.py:
import handlers
import webapp2
from webapp2_extras.routes import RedirectRoute
# Using redirect route instead of simple routes since it supports strict_slash
# Simple route: http://webapp-improved.appspot.com/guide/routing.html#simple-routes
# RedirectRoute: http://webapp-improved.appspot.com/api/webapp2_extras/routes.html#webapp2_extras.routes.RedirectRoute
_routes = [
RedirectRoute('templates/login.html', handlers.LoginHandler, name='login'),
RedirectRoute('/templates/logout.html', handlers.LogoutHandler, name='logout'),
RedirectRoute('/templates/index.html', handlers.IndexHandler, name='index'),
RedirectRoute('/templates/signup.html', handlers.SignupHandler, name='signup'),]
def get_routes():
return _routes
def add_routes(app):
if app.debug:
secure_scheme = 'http'
for r in _routes:
app.router.add(r)
app.yaml:
application: alazan-hoa
version: main
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /js
static_dir: js
- url: /images
static_dir: images
- url: /css
static_dir: css
- url: /.*
script: main.app
libraries:
- name: webapp2
version: "2.5.1"
- name: jinja2
version: "2.6"
builtins:
- appstats: on
In your routes.py file, in the RedirectRoute you specify html files, while you should specify paths that are mapped to handler methods and inside them render the html templates.
For example, in your routes.py file you should have something like this:
_routes = [
RedirectRoute('/login', handlers.LoginHandler, name='login'),
RedirectRoute('/logout', handlers.LogoutHandler, name='logout'),
RedirectRoute('/index', handlers.IndexHandler, name='index'),
RedirectRoute('/signup', handlers.SignupHandler, name='signup')
]
You can take a look at Google App Engine Boilerplate for an introduction to Google App Engine development and best practices around it.
Hope this helps!

Resources