Add Exim and Qmail support to Action Mailbox

2 files changed, 71 insertions, 15 deletions

diff --git a/actionmailbox/lib/action_mailbox/postfix_relayer.rb b/actionmailbox/lib/action_mailbox/relayer.rb
index d43c56ed2b..e2890acb60 100644
--- a/actionmailbox/lib/action_mailbox/postfix_relayer.rb
+++ b/actionmailbox/lib/action_mailbox/relayer.rb
@@ -5,19 +5,27 @@ require "net/http"
 require "uri"
 
 module ActionMailbox
-  class PostfixRelayer
-    class Result < Struct.new(:output)
+  class Relayer
+    class Result < Struct.new(:status_code, :message)
       def success?
         !failure?
       end
 
       def failure?
-        output.match?(/\A[45]\.\d{1,3}\.\d{1,3}(\s|\z)/)
+        transient_failure? || permanent_failure?
+      end
+
+      def transient_failure?
+        status_code.start_with?("4.")
+      end
+
+      def permanent_failure?
+        status_code.start_with?("5.")
       end
     end
 
     CONTENT_TYPE = "message/rfc822"
-    USER_AGENT   = "Action Mailbox Postfix relayer v#{ActionMailbox.version}"
+    USER_AGENT   = "Action Mailbox relayer v#{ActionMailbox.version}"
 
     attr_reader :uri, :username, :password
 
@@ -28,18 +36,18 @@ module ActionMailbox
     def relay(source)
       case response = post(source)
       when Net::HTTPSuccess
-        Result.new "2.0.0 Successfully relayed message to Postfix ingress"
+        Result.new "2.0.0", "Successfully relayed message to ingress"
       when Net::HTTPUnauthorized
-        Result.new "4.7.0 Invalid credentials for Postfix ingress"
+        Result.new "4.7.0", "Invalid credentials for ingress"
       else
-        Result.new "4.0.0 HTTP #{response.code}"
+        Result.new "4.0.0", "HTTP #{response.code}"
       end
     rescue IOError, SocketError, SystemCallError => error
-      Result.new "4.4.2 Network error relaying to Postfix ingress: #{error.message}"
+      Result.new "4.4.2", "Network error relaying to ingress: #{error.message}"
     rescue Timeout::Error
-      Result.new "4.4.2 Timed out relaying to Postfix ingress"
+      Result.new "4.4.2", "Timed out relaying to ingress"
     rescue => error
-      Result.new "4.0.0 Error relaying to Postfix ingress: #{error.message}"
+      Result.new "4.0.0", "Error relaying to ingress: #{error.message}"
     end
 
     private
diff --git a/actionmailbox/lib/tasks/ingress.rake b/actionmailbox/lib/tasks/ingress.rake
index f775bbdfd7..43b613ea12 100644
--- a/actionmailbox/lib/tasks/ingress.rake
+++ b/actionmailbox/lib/tasks/ingress.rake
@@ -2,12 +2,37 @@
 
 namespace :action_mailbox do
   namespace :ingress do
-    desc "Pipe an inbound email from STDIN to the Postfix ingress (URL and INGRESS_PASSWORD required)"
-    task :postfix do
+    task :environment do
       require "active_support"
       require "active_support/core_ext/object/blank"
-      require "action_mailbox/postfix_relayer"
+      require "action_mailbox/relayer"
+    end
+
+    desc "Relay an inbound email from Exim to Action Mailbox (URL and INGRESS_PASSWORD required)"
+    task exim: "action_mailbox:ingress:environment" do
+      url, password = ENV.values_at("URL", "INGRESS_PASSWORD")
+
+      if url.blank? || password.blank?
+        print "URL and INGRESS_PASSWORD are required"
+        exit 64 # EX_USAGE
+      end
+
+      ActionMailbox::Relayer.new(url: url, password: password).relay(STDIN.read).tap do |result|
+        print result.message
+
+        case
+        when result.success?
+          exit 0
+        when result.transient_failure?
+          exit 75 # EX_TEMPFAIL
+        else
+          exit 69 # EX_UNAVAILABLE
+        end
+      end
+    end
 
+    desc "Relay an inbound email from Postfix to Action Mailbox (URL and INGRESS_PASSWORD required)"
+    task postfix: "action_mailbox:ingress:environment" do
       url, password = ENV.values_at("URL", "INGRESS_PASSWORD")
 
       if url.blank? || password.blank?
@@ -15,10 +40,33 @@ namespace :action_mailbox do
         exit 1
       end
 
-      ActionMailbox::PostfixRelayer.new(url: url, password: password).relay(STDIN.read).tap do |result|
-        print result.output
+      ActionMailbox::Relayer.new(url: url, password: password).relay(STDIN.read).tap do |result|
+        print "#{result.status_code} #{result.message}"
         exit result.success?
       end
     end
+
+    desc "Relay an inbound email from Qmail to Action Mailbox (URL and INGRESS_PASSWORD required)"
+    task qmail: "action_mailbox:ingress:environment" do
+      url, password = ENV.values_at("URL", "INGRESS_PASSWORD")
+
+      if url.blank? || password.blank?
+        print "URL and INGRESS_PASSWORD are required"
+        exit 111
+      end
+
+      ActionMailbox::Relayer.new(url: url, password: password).relay(STDIN.read).tap do |result|
+        print result.message
+
+        case
+        when result.success?
+          exit 0
+        when result.transient_failure?
+          exit 111
+        else
+          exit 100
+        end
+      end
+    end
   end
 end