server: fix LCSC import attachment download

server.rb

@@ -388,20 +388,20 @@ get '/import/lcsc/:lcsc' do
   part["datasheet"] = result["pdfUrl"]
   existing = get_part_by_name(part["name"])
   halt 401, "part name already exists" if existing
-  puts part
   begin
     add_part(part)
   rescue StandardError => e
     halt 401, e.message
   end
   i = 0
-  (part["attachments"] + [part["datasheet"]]).each do |attachement|
-    file = attachement.split("/")[-1]
+  (part["attachments"] + [part["datasheet"]]).each do |attachment|
+    next unless attachment
+    file = attachment.split("/")[-1]
     dir = PUBLIC + "/" + ATTACHMENTS + "/" + part["name"]
     path = "#{dir}/#{i}_#{file}"
     i += 1
     unless File.file?(path) then
-      uri = URI(attachement)
+      uri = URI(attachment)
       res = Net::HTTP.get_response(uri)
       if (res.is_a?(Net::HTTPSuccess)) then
         Dir.mkdir(dir) unless File.directory?(dir)
@@ -411,5 +411,5 @@ get '/import/lcsc/:lcsc' do
       end
     end
   end
-  return 200
+  return 200, "#{part['name']} added"
 end