Heads up: Ruby's Net::HTTP silently retries a failing request

When a method has keyword arguments, Ruby offers implicit conversion of a Hash argument into keyword arguments. This conversion is perfo...

For Sidekiq to be able to retry your jobs it has to be able to catch errors that occur while a job is executed.

Per default, Sidekiq will not raise / notify you if the retry count is exhausted. It will only copy the job to the dead queue (see...

We usually rely on VCR and WebMock to prevent any real network connection when running our unit tests.

This is not entirely true: They are both limited to a set of HTTP libraries...

Consider you have a website vhost listening to www.example.com, redirecting all incoming requests that do not talk about the configured hostname (this is often used to redirect users to http://www.example.com when entering only `http://example...

TLS/SSL certificates are often used for HTTPS traffic. Occasionally a service may also use their TLS certificate to support public-key encrypting data (e.g. when it is part of the URI and visible to the user, but contains sensitive information).

...

While debugging an intricate issue with failed HTTP requests I have come to appreciate the more advanced features of the httpclient Rubygem.

The gem is much more than a lightweight wrapper around Ruby's `net/...

Access the Method object

Dead simple: Get the method object and ask for its owner:

"foo".method(:upcase)
# =>  #<Method: String#upcase> 

"foo".method(:upcase).owner
# => String

Look up a method's source location

Ruby 1.9 adds...

RSpec provides a nice diff when certain matchers fail.

Here is an example where this diff is helpful while comparing two hashes:

{a:1}.should match(a:1, b:2)

Failure/Error: {a:1}.should match(a:1, b:2)
  expected {:a=>1} to match {:a=>1, :b...

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...

The solution in this card is based on a stack overflow post by Leventix.

If you need to make request come from a fixed IP ...