Note: Making a reverse proxy with nginx is much more straightforward.
A reverse proxy is a "man in the middle" server that tunnels requests to another server. You can use for things like:
Note: This process is tailored to our specific needs and tools at makandra. While it will certainly not apply to all (especially larger teams), we think it is a helpful starting point.
In order to reduce the number of rejects we get from clients, we want to review all code written before it goes to the staging server.
If you're responsible for gatekeeping in a projects, this is what to do:
First, read the [Gatekeeping for developers](https://makandracards.com/makandra/6579-gatekeeping-guide-for-develope...
When you register a delegated event using on (or the deprecated delegate / live), it is somewhat hard to manually trigger these events manually, e.g. for testing.
After trying jQuery's trigger to no avail, I had success by using native Javascript methods to create and dispatch an event. For instance, to trigger a mousedown event:
element = $('...').get(0);
event = new MouseEvent('mousedown', { view: window, cancelable: true, bubbles: true }...
sslscan is a nice tool to show details about TLS/SSL connections:
~> sslscan some-host-at.makandra.de
Testing SSL server some-host-at.makandra.de on port 443
Supported Server Cipher(s):
Failed SSLv3 256 bits ECDHE-RSA-AES256-GCM-SHA384
Failed SSLv3 256 bits ECDHE-ECDSA-AES256-GCM-SHA384
Failed SSLv3 256 bits ECDHE-RSA-AES256-SHA384
Failed SSLv3 256 bits ECDHE-ECDSA-AES256-SHA384
Rejected SSLv3 256 bits ECDHE-RSA-AES256-SHA
...
Prefered Server Cipher(s):
TLSv1 128 bits ECDHE-RSA-A...
Capistrano 3 is a major rework of the framework and requires several adjustments to your deploy configuration files. The biggest change is that they moved away from their custom DSL and use Rake instead. For connecting with and operating on the servers, they bring a new gem SSHKit which does the heavy lifting. It's SSHKit's DSL that is used anywhere inside the Rake tasks. See #Resources at the bottom for examples.
For migration from 2 to 3, follow this tutorial: [Capistrano 3 Upgrade Guide](https://semaphorec...
If you have FactoryGirl traits like this:
factory :movie do
title 'Sunshine'
year 2007
trait :vintage do
year 1951
end
trait :moody do
title 'Interstellar'
end
end
You can now call them from Cucumber Factory like this:
Given there is a movie (vintage, moody)
Please don't use the horrible datetime_select helper. It has a terrible UI. Always prefer to use a visual time picker like Rome instead.
In case everything has failed and you do need a Cucumber step to pick a datetime datetime_select, here it is:
When(/^I select the time (\d+)\-(\d+)\-(\d+) (\d+):(\d+) from "(.*?)"$/) do |year, month, day, hour, minute, label_text|
label = page.find('label', text: label_text)
id = label[...
Starting with has_defaults 0.4.2, default values that are lambdas are no longer called with the current object as argument, but instance_exec'd instead.
This means you can now use dagger lambdas like this:
has_defaults :full_name => -> { "#{first_name} #{last_name}" }
You can also use lambda and proc as long as you don't take parameters:
has_defaults :full_name => lambda { "#{first_name} #{last_name}" }
has_defaults :full_name => proc { "#{first_name} #{last_name}" }
You can no longer write this:
has...
When using Savon to connect a SOAP API, you may want to use Savon::SpecHelper to mock requests in your tests as described in their documentation.
When sending a message body, the savon mock object requires a message to be set, like this:
savon.expects(:action_name).with(message: { user_id: 123 }).returns('<some xml>')
If you want to stub only the returned XML and do not care about request arguments, you can not omit with as Savon's helper will complain:
savo...
I was annoyed that RubyMine's autocompletion did not work via Ctrl+Space for me. In fact, it did not work in any application.
Turns out that keyboard combination was hijacked by Ubuntu as it's the default for switching input languages (i.e. keyboard layouts). If you use only 1 language/layout, you will not notice except for the key not working.
To fix it, do the following:
ibus-setup (e.g. from a terminal). This will open a GUI dialog.<Control>space".After adding a vdisk to an ESXi linux guest you will assert that you can't find a new device in the running VM. You have to force a SCSI rescan.
grep mtpspi /sys/class/scsi_host/host?/proc_name
echo "- - -" > /sys/class/scsi_host/<host>/scan and insert the host found in point two for <host>
cat /proc/scsi/scsi should now show the new ad...Datetime picker that offers:
Localization happens via moment.js (which is a Dependency anyway).
However, you won't be happy trying to customize it too much:
If you're a frequent user of LibreOffice, I strongly recommend to checkout out the VLOOKUP function (SVERWEIS in German). It allows you to treat a column pair as a hash map, where you lookup keys in the first column and return values from the second.
Small (1.5 KB) Javascript library that lets you render tables, lists, etc. with hundreds of thousands of items.
How it works is that you move your data set from the DOM into JS. Clusterize than makes sure only the rows in the viewport (and adjacent batches) are rendered.
I believe that AngularUI's data grid component uses a similar technique to reduce the number of bindings in large tables, but I can't seem to find documentation on that.
Jasmine has a jasmine.clock() helper that you can use to travel through time and trigger setTimeout and setInterval callbacks:
beforeEach(function() {
timerCallback = jasmine.createSpy("timerCallback");
jasmine.clock().install();
});
afterEach(function() {
jasmine.clock().uninstall();
});
it("causes a timeout to be called", function() {
setTimeout(function() {
timerCallback();
}, 100);
expect(timerCallba...
You might wonder about this request in your test.log:
Started GET "/__identify__" for 127.0.0.1 at 2015-04-29 18:00:02 +0100
This is what happens: For drivers like Selenium, Capybara will boot up a Thin or Webrick server in a separate thread. It then makes a GET request to /__identify__ to see if the server is ready to accept requests.
Since you don't have a route that responds to /__identify, Capybara will wrap your Rails app in...
If you need a gem for a certain purpose, be sure to check this site.
The rankings are determined by counting up the number of forks and watchers of various github projects, so I'd view it less as "this is what I should be using," and more as "these are some things I should check out." At the very least, they're all likely to be under active development and fairly up to date, and it's very useful to see groups of gems broken down by category.
Service that you can integrate for user feedback.
Super-simple integration: Add a <script> tag to your layout, done.
It will then add a button to the bottom right of your application. When a user clicks it, they can take a screenshot and leave a message. The screenshot then appears in TrackDuck's interface for you to work off.
Current pricing is 9 USD per month for the smallest tier (1 project).
jquery-placeholder is a simple jQuery plugin that enables form placeholders in browsers that do not support them natively, i.e. IE < 10.
TL;DR Under certain circumstances, dynamically defined symbols may break keyword arguments in Ruby 2.2. This was fixed in Ruby 2.2.3 and 2.3.
Specifically, when …
def m(foo: 'bar, option: 'will be lost', **further_options))Symbol (e.g. 'culprit'.to_sym) that is created before the method is parsed
option and a culprit keyword argument… then the `optio...
dmesg shows the kernel ring buffer containing low-level system messages.
Per default, dmesg shows a timestamp:
12:59:26 fnordomator ~ > dmesg | tail
[101925.211846] usb 2-1.1: USB disconnect, device number 16
[110486.855788] usb 2-1.1: new high-speed USB device number 17 using ehci_hcd
If you're a human, use dmesg -T to print the timestamp human readable:
12:59:31 fnordomator ~ > dmesg -T | tail
[Di Apr 21 12:43:16 2015] usb 2-1.1: USB disconnect, device number 16
[Di Apr 21 15:05:57 2015] usb 2-1.1: new hig...
When using send_file (for example for attachments of any kind), make sure your application knows the correct mime types so that all browsers can handle the files. It is much more convenient for users if they can decide to open a file directly instead of having to save it first.
Simply put your mime types in config/initializers/mime_types.rb. send_file will take care of everything else.
Put your mime types in config/initializers/mime_types.rb. Additionally, tell send_file to use them (for ex...
You can freeze any Ruby object to prevent further modification.
If you freeze an ActiveRecord and try to set an attribute you will an error like this:
can't modify frozen hash
This is because ActiveRecord delegates #freeze to its attributes hash.
You can unfreeze most Ruby objects by creating a shallow copy of the frozen object by calling #dup on it:
user = User.find(3)
user.freeze
unfrozen_user = user.dup
Notes for Rails 2 users
-----------------...
Rails comes with a Rake task notes that shows code comments that start with "TODO", "FIXME", or "OPTIMIZE".
While it's generally not good practice to leave them in your code (your work is not done until it's done), in larger projects you will occasionally have to use them as other parts of the application that you depend upon are not yet available.
To keep track of them, run rake notes. Its output looks something like this:
$ rake notes
app/controllers/fron...