DATASTEAD Software
Multimedia Components

FAQ

Q: does THttpScan support window.open("sub-page.html") links?

Yes, THttpScan finds this kind of link, you can test that easily by running Demo.exe included in the demo project and starting from the following page:
http://www.javascript-coder.com/window-popup/javascript-window-open-example1.html
  

Q: If I pass an invalid URL when calling the Start method, this event is triggered but the error code is 0 and there is no error message. Shouldn't this return a 404?

The 404 error code is returned by an existing and responding server when the specified HTML page does not exist.

E.g. in http://www.datastead.com/wrongpage.htm, the server (datastead.com) will return the 404 error.

However if the server name itself is wrong (e.g. http://www.dataZtead.com/wrongpage.htm), the host name "dataZtead.com" does not exist, so it cannot return any error code. 

The "0" error code means that the specified server does not exist or does not reply.
 

Q: when I paste a long URL in the edit field, no link is reported. 

A: If you paste the URL in an TEdit field, the TEdit field truncates the URL to 255 characters.

The workaround consists to use a TMemo field instead (be sure to disable the WordWrap property, otherwise the URL could be truncated with line feeds).

Q: when I build my project using C++Builder, I get the following errors:
Unresolved external 'InternetCloseHandle' referenced from BORLAND\CBUILDER\IMPORTS\THTSCAN.LIB|HttpScan
Unresolved external 'InternetCrackUrlA' referenced from BORLAND\CBUILDER\IMPORTS\THTSCAN.LIB|HttpScan
Unresolved external 'InternetCombineUrlA' referenced from BORLAND\CBUILDER\IMPORTS\THTSCAN.LIB|HttpScan

A:
- Go to Project | Add to Project 
- in the "file type" listbox at the bottom of the tab, choose ".lib" files,
- navigate to your CBuilder\Lib directory, and choose either inet.lib (CBuilder4) or wininet.lib (CBuilder5 and CBuilder6).
- Build and save your project. 

Q: when I build my project using C++Builder, I get the following error: 
Unable to find package import: THtScan.bpi

A: Go to Project | Options | Packages. Then go to the  "Runtime packages" groupbox, at the bottom of the tab. Go to the end of the packages list edit box, and remove THtScan.bpi.