[DUG] Testing internet web site connections

[Ross Levis]

With a 32-bit compiler you need the 32-bit editions of OpenSSL DLLs installed.  They usually go to Windows\System32.  I instruct my users to download the Light edition on this website.

 

http://slproweb.com/products/Win32OpenSSL.html

 

Ross.

 

From: delphi-bounces at listserver.123.net.nz [mailto:delphi-bounces at listserver.123.net.nz] On Behalf Of John Bird
Sent: Wednesday, 12 October 2016 9:30 p.m.
To: NZ Borland Developers Group - Delphi List
Subject: [DUG] Testing internet web site connections

 

I have been considering writing something to monitor connectivity to a few web sites- note not detecting whether there is an internet connection, but whether a number of sites are responding.  Some http and some https.

 

(Have got tired of opening a CMD prompt and pinging sites)

 

I have experimented with this in Indy for Delphi 2007 and testing a http site seems simple.   https is a little more involved – has to have the right OpenSSL DLLs in the program’s folder, libeay32.dll and ssleay32.dll and I am not sure which is the right versions for D2007 to get from https://indy.fulgan.com/SSL/  - for instance D2007 is 32 bit but windows is 64bit, and which version for which Delphi – there are new versions from V0.9.8r to v1.0.2j.  So far just getting “could not load SSL library” and “error creating SSL context”

 

Indy seems quite ideal, being asynchronous, doesn’t matter if it takes a while.

 

I could instead do Indy in Delphi Berlin, or use the non-Indy native internet connectivity in Berlin but haven’t found useful sample code as a guide for that.   

 

Any recommendations out there of best tools to use/point me to simple sample code.   Happy just to get as far as a 200 returned or 404 etc.

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