UPDATED Originally, this answer stated that although this was possible with a few tricks, it was strongly discouraged. This was based on advice on the Heroku developer support website. However, recently Heroku issued a communication specifically describing how to achieve this, and have watered down their advice on the developer site. The complete text of … Read more
As of today, 10th October 2014, using Heroku Cedar stack, and ExpressJS ~3.4.4, here is a working set of code. The main thing to remember here is that we ARE deploying to Heroku. SSL termination happens at the load balancer, before encrypted traffic reaches your node app. It is possible to test whether https was … Read more
In case you’re using virtualenvwrapper (I highly recommend doing so), you can define different hooks (preactivate, postactivate, predeactivate, postdeactivate) using the scripts with the same names in $VIRTUAL_ENV/bin/. You need the postactivate hook. $ workon myvenv $ cat $VIRTUAL_ENV/bin/postactivate #!/bin/bash # This hook is run after this virtualenv is activated. export DJANGO_DEBUG=True export S3_KEY=mykey export … Read more
To really understand the ephemeral filesystem, you need to understand what a dyno is. You can read more about how dynos work. In a nutshell, though, a process runs on Heroku in a virtual machine with its own filesystem. That virtual machine can stop for a number of reasons, taking the filesystem along with it. … Read more
I ran into the same error above, app was crashing on heroku (running fine in dev) but error logs on heroku were not revealing any clues. I read other answers on this page and broke out in a sweat after seeing “rebuilding the app.” I figured maybe I could get in the heroku console and … Read more
You can install the free New Relic add-on. It has an availability monitor feature that will ping your site twice per minute, thus preventing the dyno from idling. More or less the same solution as Jesse but maybe more integrated to Heroku… And with a few perks (performance monitoring is just great). Note: to all … Read more
Here is what worked for me when I deployed to Heroku. http://flask-cors.readthedocs.org/en/latest/ Install flask-cors by running – pip install -U flask-cors from flask import Flask from flask_cors import CORS, cross_origin app = Flask(__name__) cors = CORS(app) app.config[‘CORS_HEADERS’] = ‘Content-Type’ @app.route(“https://stackoverflow.com/”) @cross_origin() def helloWorld(): return “Hello, cross-origin-world!”
Update (thanks to dawmail333): heroku logs -n 1500 or, to tail the logs live heroku logs -t Heroku log documentation If you need more than a few thousand lines you can Use heroku’s Syslog Drains Alternatively (old method): $ heroku run rails c File.open(‘log/production.log’, ‘r’).each_line { |line| puts line }
You have to upload your public key to Heroku: heroku keys:add ~/.ssh/id_rsa.pub If you don’t have a public key, Heroku will prompt you to add one automatically which works seamlessly. Just use: heroku keys:add To clear all your previous keys do : heroku keys:clear To display all your existing keys do : heroku keys EDIT: … Read more
Sprockets together with Sass has some nifty helpers you can use to get the job done. Sprockets will only process these helpers if your stylesheet file extensions are either .css.scss or .css.sass. Image specific helper: background-image: image-url(“logo.png”) Agnostic helper: background-image: asset-url(“logo.png”, image) background-image: asset-url($asset, $asset-type) Or if you want to embed the image data in … Read more