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ebook【Delphi跨平台資料庫程式設計火速上手】電子書出版 (CHT)

Delphi 跨平台資料庫程式設計火速上手,是本關於整合 Delphi 的跨平台技術打造 2-Tier 架構的跨平台 APP 的入門技術書。 全書沒有需要理解的技術知識,只講套路。 力求短時間把製作 APP 的工法熟悉,未來要開發其它的應用程式也能舉一反三。 底下...

2016/10/29

The story of catch ghost for Cloud Service use REST DataSnap

Chinese language version in here.


Generally, develop REST DataSnap project is easy and right for Delphier.

But...

























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!

User1: So?

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.
Me: ............................

User can connect to internet.
But, I didn't to connect my service...

Why?
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

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