go-rest-api-template

Template for building REST Web Services in Golang with:

• go-swagger for representation of RESTful API
• gorilla/mux for routing
• codegangsta/negroni as a middleware handler
• strechr/testify for writing easier test assertions
• unrolled/render for HTTP response rendering
• palantir/stacktrace to provide more context to error messages
• unrolled/secure to improve API security
• oxeque/realize to watch for changes in files during development

API Routes with Health check

Route{"Healthcheck", "GET", "/healthcheck", HealthcheckHandler},
//=== USERS ===
Route{"ListUsers",  "GET", "/users", ListUsersHandler},
Route{"GetUser",    "GET", "/users/{uid:[0-9]+}", GetUserHandler},
Route{"CreateUser", "POST", "/users", CreateUserHandler},
Route{"UpdateUser", "PUT", "/users/{uid:[0-9]+}", UpdateUserHandler},
Route{"DeleteUser", "DELETE", "/users/{uid:[0-9]+}", DeleteUserHandler},

API specification

Execute the following in the directory with the main.go and it will parse all the files that are reachable by that main package to produce a swagger specification and serve it with SwaggerUI:

swagger generate spec -o ../../swagger.json --scan-models
swagger serve -F=swagger ../../swagger.json

Testing

Retrieve a list of users:

curl -X GET http://localhost:3009/users | jq

Get a specific user:

curl -X GET http://localhost:3009/users/0 | jq

Starting the service on a production server

This is how you could run your app on a server:

First, you copy the binary and the fixtures.json + VERSION files into a directory, e.g. /opt/go-rest-api-template.

Then start the app as a service. Store the app's PID in a text file so we can kill it later.

#!/bin/bash
export ENV=DEV
export PORT=8080
export VERSION=/opt/go-rest-api-template/VERSION
export FIXTURES=/opt/go-rest-api-template/fixtures.json
sudo nohup /opt/go-rest-api-template/go-rest-api-template >> /var/log/go-rest-api-template.log 2>&1&
echo $! > /opt/go-rest-api-template/go-rest-api-template-pid.txt

When you want to kill your app later during a redeployment or a server shutdown, then you can kill the app by looking up the previously stored PID:

#!/bin/bash
if [ -f /opt/go-rest-api-template/go-rest-api-template-pid.txt ]; then
  kill -9 `cat /opt/go-rest-api-template/go-rest-api-template-pid.txt`
  rm -f /opt/go-rest-api-template/go-rest-api-template-pid.txt
fi