gochat

Simple Chat API using Go and WebSocket

Prerequisite

1. Go

$ go version
go version go1.9.4 darwin/amd64

2. SQLite

$ sqlite3 version
SQLite version 3.16.0 2016-11-04 19:09:39

How to Run

1. Clone this repository

$ git clone https://github.com/haruelrovix/gochat.git && cd gochat

2. Start SQLite using chat.db

$ sqlite3 chat.db

3. Create below schema

CREATE TABLE chat(
  pk integer primary key autoincrement,
  message text,
  timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
);

4. Check it again, just to make sure

sqlite> .schema

5. Open another terminal, run

$ go run main.go

6. If it asks to accept incoming network connections, allow it.

7. gochat listening on port 9000

[negroni] listening on :9000

Test the API

To test Post and Get, I used Insomnia REST Client.

1. Post to http://localhost:9000/chat. It accepts one parameter: the string message to sent.

2. Get to http://localhost:9000/chat. It retrieves all previously-sent messages.

WebSocket can be tested using Smart Websocket Client.

3. Connect to ws://localhost:9000/ws, send a message.

4. Get again, the message sent through WebSocket is also recorded.

[
 {
  "message": "Hi!",
	"sent": "2018-02-18T18:38:12Z"
 },
 {
  "message": "asl pls",
  "sent": "2018-02-18T18:42:40Z"
 },
 {
  "message": "hobby?",
	"sent": "2018-02-18T18:42:53Z"
 },
 {
  "message": "a lonely programmer",
	"sent": "2018-02-18T18:48:33Z"
 }
]

Logging

Negroni, Idiomatic HTTP Middleware for Golang.

[negroni] listening on :9000
[negroni] 2018-02-19T01:38:12+07:00 | 0 |        10.765667ms | localhost:9000 | POST /chat
[negroni] 2018-02-19T01:42:40+07:00 | 0 |        2.117104ms | localhost:9000 | POST /chat
[negroni] 2018-02-19T01:42:53+07:00 | 0 |        5.173429ms | localhost:9000 | POST /chat
[negroni] 2018-02-19T01:42:57+07:00 | 200 |      5.160381ms | localhost:9000 | GET /chat
[negroni] 2018-02-19T01:43:04+07:00 | 200 |      177.932µs | localhost:9000 | GET /chat
[negroni] 2018-02-19T01:50:52+07:00 | 200 |      1.622574ms | localhost:9000 | GET /chat

Debugging

VS Code and Delve, a debugger for the Go programming language.