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01-setup.md

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Setup the chat project (5-10 minutes)

Goals

The goal of the portion is to setup project chat-server which will hold the code for your chat project.

In the interest of time, we will all organize our chat server around the following data structures which we have scaffolded for you in chat.go.

  • a ChatUser struct to handle the individual chat connection for the user.
  • a ChatRoom struct to handle all of the connections, chatroom messages, and disconnects.
  • a main function that will be the entry point of your code.

We will walk through populating all of these to create the chat server in later lessons.

Steps

  1. Create a directory chat-server for your code underneath the main folder for this repository, and a file chat.go that will contain the code.

E.g. under golang-lab-chat/chat-server

```bash
mkdir -p chat-server
cd chat-server
```

tip: If you are using Vagrant, this will 'appear' in /opt/golang-lab-chat/chat-server. The /opt/golang-lab-chat folder is shared from the repository folder in your host operating system, so any changes you make will be reflected.

  1. 🌟 Download the basic scaffold code chat.go, and put it in the chat-server folder. Open chat.go with your favorite code editor.

  2. Review the struct ChatRoom. This struct will handle

* users joining;
* users disconnecting;
* receiving individual messages from users and broadcasting (relaying) them to other users.

  1. Review the struct ChatUser. This struct will handle * reading lines of data from the user socket and notifying the chatroom there is a new messages * writing data back to the socket (e.g messages from other users)

  2. Ensure the code runs by typing go run chat.go. You should see a message about the chat server starting.

$ cd /opt/golang-lab-chat # if using vagrant
$ go run chat.go
2015/05/03 20:13:42 Chat server starting!

Get the solution

Proceed to Lesson 2