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Add low-level APIs to allow handing SMTP connection manually #98

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39 changes: 30 additions & 9 deletions src/postal/smtp.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -26,14 +26,36 @@
[postal.support :only [make-props]])
(:import [javax.mail Transport Session]))

(defn get-session [server]
(let [{:keys [sender debug]} server]
(doto (Session/getInstance (make-props sender server))
(.setDebug (if debug true false)))))

(defn get-protocol [server]
(if (:ssl server) "smtps" "smtp"))

(defn get-transport [^Session session ^String protocol]
(.getTransport session protocol))

(defn connect! [^Transport transport server]
(let [{:keys [host port user pass]} server]
(assert (or (and (nil? user) (nil? pass)) (and user pass)))
(.connect transport host port user pass)))

(defn transport-send
([^Transport transport ^Session session msg]
(transport-send transport (make-jmessage msg session)))
([^Transport transport ^javax.mail.Message jmsg]
(.sendMessage transport jmsg (.getAllRecipients jmsg))
{:code 0 :error :SUCCESS :message "messages sent"}))

(defn ^:dynamic smtp-send* [^Session session ^String proto
{:keys [host port user pass]} msgs]
(assert (or (and (nil? user) (nil? pass)) (and user pass)))
(with-open [transport (.getTransport session proto)]
(.connect transport host port user pass)
{:keys [user pass] :as args} msgs]
(with-open [^Transport transport (get-transport session proto)]
(connect! transport args)
(let [jmsgs (map #(make-jmessage % session) msgs)]
(doseq [^javax.mail.Message jmsg jmsgs]
(.sendMessage transport jmsg (.getAllRecipients jmsg)))
(transport-send transport jmsg))
{:code 0 :error :SUCCESS :message "messages sent"})))

(defn smtp-send
Expand All @@ -45,14 +67,13 @@
(catch Exception e
{:code 99 :error (class e) :message (.getMessage e)}))))
([args & msgs]
(let [{:keys [host port user pass sender ssl debug]
(let [{:keys [host port ssl]
:or {host "localhost"}} args
port (if (nil? port)
(if ssl 465 25)
port)
proto (if ssl "smtps" "smtp")
proto (get-protocol args)
args (merge args {:port port
:proto proto})
session (doto (Session/getInstance (make-props sender args))
(.setDebug (if debug true false)))]
session (get-session args)]
(smtp-send* session proto args msgs))))