How to develop a productive HTTP client in Golang (Go)

9h 44m 29s
English
Paid

Course description

Have you ever called a REST API from your Go program? Did you implemented your own HTTP client or did you ended up using some of the thousand libraries out there? Do you know what your HTTP client is doing in the background? In this course we're starting from scratch! We're going to remember how a basic HTTP call looks like by digging into the request & response objects. We're going to write a basic HTTP client to perform HTTP requests and then use it in productive applications.

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 What issues do we have? Can we scale our applications by following this approach? Of course not! 

That's why we're creating an HTTP client library that provides:

  • Fast, reliable and friction-free HTTP connections.

  • Support for all HTTP methods: GET, POST, PUT, DELETE, PATCH and more!

  • A Concurrency-Safe HTTP client that you can use without worrying about performance.

  • Content type management and optimization.

  • Mocking features out of the box.

  • A clean interface in case you want to unit test your code without relying on integration testing features.

  • A robust implementation so you won't need any external dependency whatsoever.

  • Completely customizable interface: timeouts, transport layer, custom HTTP client and lots of useful features.

  • A library that is PRODUCTION-READY!

If you're looking to integrate a 3rd party REST APIs in your code, you'll need to perform an HTTP call to it. Make sure you take a look at this course before even considering alternatives out there that will force you to use different dependencies for running, testing and extending your code! As Robert Pike says: "A little copying is much better than a little dependency". In this course we're not only getting rid of the dependencies but we're also getting rid of the copying. We're not using anything more than the Go's standard library to design & develop our own HTTP client.

This client will the baseline for all of the applications we're going to build later, making our business scale and grow as fast as we can Go.

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#1: Introduction

All Course Lessons (45)

#Lesson TitleDurationAccess
1
Introduction Demo
01:35
2
Welcome!
02:51
3
The reason for this course
08:43
4
What we're going to build
03:15
5
How an HTTP call looks like
13:23
6
Connections and timeouts
08:32
7
Implementing a basic HTTP GET
06:20
8
Default problems
21:33
9
The reason for a new library
25:36
10
Introduction to Go modules
20:18
11
Go basics: Structs, functions, interfaces and methods.
16:05
12
Adding basic behavior
13:24
13
Defining custom & common headers
17:41
14
Dealing with the request body
13:22
15
Testing, testing and testing!
18:09
16
Be careful with code coverage
18:38
17
Dealing with timeouts
16:07
18
Allow timeout customization
16:28
19
Allow timeout disabling
09:05
20
Builder pattern applied
15:47
21
Refactoring our builder implementation
06:11
22
Making the client concurrent-safe
09:04
23
Using our custom response implementation
18:11
24
Creating our examples
13:16
25
Should we provide mocking features?
12:24
26
Defining the Mock struct
14:12
27
Adding the mock server
17:35
28
Responding from the mock server
13:03
29
Adding a default mock
17:20
30
How to flush every active mock
09:01
31
Improving mock body and keys
07:57
32
How to publish a Go module
08:02
33
How to use our Go module
09:27
34
Easily testing API calls with our library
18:43
35
Allowing custom HTTP client
09:31
36
Clean our public interface
14:02
37
Adding documentation to our code
08:40
38
Adding more examples
21:08
39
Allow user agent definition
07:56
40
Defining common constants
06:29
41
Releasing the first stable version!
07:44
42
Cleaning our mocking interface
19:05
43
Changing how we mock requests
23:19
44
Cleaning our mock server
07:15
45
What we have done
18:02

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