Generally, develop REST DataSnap project is easy and right for Delphier.
When I performanced.
I have exception in REST DataSnap service demo incredibly...
and in local area network(with VPN), I cannot believe it!
I don't have the foggiest idea what REST DataSnap service connection failed, and it's very hurry as the deadline approached!
Fortunately, I was develop DataSnap framework, it flexible!
So, fine tuning, only fine tuning, the service is fine!
Though, the substitute solution performance is slow and not good.
We must understand where the problam.
===I flying to trouble site from office to factory...(It's overkill!)===
User1: I can to access internet, but your app can not connection.
Me: Impossible! Maybe you have install some banned application!User2: Maybe? Maybe your app is super bug in my PC.
Me: Call MIS ......re-format! re-install!
---30 minutes passed---
Me: Look! It's fine!
Me: You should not question Delphier profession, because Delphier was the only one who can solve the problem!
But, connect error occurs when I left. (Murphy's Law?)
User2: Stop! Your app connect error occurs in my PC!
User1: Now, It can not work too.
MIS: My work is only re-format, I don't know why.
User can connect to internet.
But, I didn't to connect my service...
|Now debuging... Source|
After waiting for so long...I got it!
And the answer is not "Firewall".
The answer is
Proxy! The answer is Proxy!
|The arch criminal is Proxy!|
Oh, dear. That's dreadful. In the year Halloween. :-P