Groovy Mailgun in Heroku
I had some problems using Mailgun from Groovy. Mailgun’s SMTP api didn’t work for me, so I used their REST api. Here are the details…
First you need to add the encodeAsURL method to Object’s metaClass. You’ll use this later for encoding the parameters.
final codec = URLCodec.newInstance()
Object.metaClass.”encodeAsURL” = { -> codec.encode(delegate) }
Then define your API url and parameters:
def url = ‘https://api.mailgun.net/v2/your-app.mailgun.org/messages’
def params = [from: “you@email.com”, to: to, subject: subject, text: text]
Next, create the DefaultHttpClient and HttpPost with credentials and headers:
def httpclient = new DefaultHttpClient()
def post = new HttpPost(url);
def creds = new UsernamePasswordCredentials(‘api’, API_KEY)
post.addHeader(BasicScheme.authenticate(creds, “US-ASCII”, false));
post.addHeader(“Content-Type”, “application/x-www-form-urlencoded”);
Lastly, encode the parameters, join them, and put them in the post.
def list = []
params.each {k,v -> list « “${k}=${v.encodeAsURL()}” }
post.entity = new StringEntity(list.join(‘&’))
httpclient.execute(post);
That’s it, you’re done!
Here’s the full gist of EmailService.
