overleaf/services/web/app/coffee/Features/Email/EmailSender.coffee

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logger = require('logger-sharelatex')
metrics = require('metrics-sharelatex')
Settings = require('settings-sharelatex')
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nodemailer = require("nodemailer")
sesTransport = require('nodemailer-ses-transport')
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sgTransport = require('nodemailer-sendgrid-transport')
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mandrillTransport = require('nodemailer-mandrill-transport')
rateLimiter = require('../../infrastructure/RateLimiter')
_ = require("underscore")
if Settings.email? and Settings.email.fromAddress?
defaultFromAddress = Settings.email.fromAddress
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else
defaultFromAddress = ""
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# provide dummy mailer unless we have a better one configured.
client =
sendMail: (options, callback = (err,status) ->) ->
logger.log options:options, "Would send email if enabled."
callback()
if Settings?.email?.parameters?.AWSAccessKeyID? or Settings?.email?.driver == 'ses'
logger.log "using aws ses for email"
nm_client = nodemailer.createTransport(sesTransport(Settings.email.parameters))
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else if Settings?.email?.parameters?.sendgridApiKey?
logger.log "using sendgrid for email"
nm_client = nodemailer.createTransport(sgTransport({auth:{api_key:Settings?.email?.parameters?.sendgridApiKey}}))
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else if Settings?.email?.parameters?.MandrillApiKey?
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logger.log "using mandril for email"
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nm_client = nodemailer.createTransport(mandrillTransport({auth:{apiKey:Settings?.email?.parameters?.MandrillApiKey}}))
else if Settings?.email?.parameters?
logger.log "using smtp for email"
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smtp = _.pick(Settings?.email?.parameters, "host", "port", "secure", "auth", "ignoreTLS")
nm_client = nodemailer.createTransport(smtp)
else
logger.warn "Email transport and/or parameters not defined. No emails will be sent."
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nm_client = client
if nm_client?
client = nm_client
else
logger.warn "Failed to create email transport. Please check your settings. No email will be sent."
checkCanSendEmail = (options, callback)->
if !options.sendingUser_id? #email not sent from user, not rate limited
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return callback(null, true)
opts =
endpointName: "send_email"
timeInterval: 60 * 60 * 3
subjectName: options.sendingUser_id
throttle: 100
rateLimiter.addCount opts, callback
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module.exports =
sendEmail : (options, callback = (error) ->)->
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logger.log receiver:options.to, subject:options.subject, "sending email"
checkCanSendEmail options, (err, canContinue)->
if err?
return callback(err)
if !canContinue
logger.log sendingUser_id:options.sendingUser_id, to:options.to, subject:options.subject, canContinue:canContinue, "rate limit hit for sending email, not sending"
return callback("rate limit hit sending email")
metrics.inc "email"
options =
to: options.to
from: defaultFromAddress
subject: options.subject
html: options.html
text: options.text
replyTo: options.replyTo || Settings.email.replyToAddress
socketTimeout: 30 * 1000
if Settings.email.textEncoding?
opts.textEncoding = textEncoding
client.sendMail options, (err, res)->
if err?
logger.err err:err, "error sending message"
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err = new Error('Cannot send email')
else
logger.log "Message sent to #{options.to}"
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callback(err)