Download Delphi 10
A google search shows a few examples on how to download a file in Delphi but most are buggy and half of the time don't work in my experience.
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I'm looking for a simple robust solution which will let me download a single exe (for updating my app) and will hold the execution of the current update thread until the download is done or errors out. The process is already threaded so the download code should hold execution until it's done (hopefully).
Here's two implementations, both seem very complicated
1. http://www.scalabium.com/faq/dct0116.htm
2. http://delphi.about.com/od/internetintranet/a/get_file_net.htm
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3 Answers
The second approach is the standard way of using Internet resources using WinINet, a part of Windows API. I have used it a lot, and it has always worked well. The first approach I have never tried. (Neither is 'very complicated'. There will always be a few additional steps when using the Windows API.)
If you want a very simple method, you could simply call UrlMon.URLDownloadToFile. You will not get any fine control (at all!) about the download, but it is very simple.
Example:
Why not make use of indy. If you use the TIdHTTP its simple
You can even add a progress bar by using the OnWork and OnWorkBegin Events
I'm not sure if these event fire in the context of the main thread, so any updates done to VCL components may have to be done using the tidnotify component to aviod threading issues. Maybe someone else can check that.
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I use Delphi RAD 2010 and Indy 10.5.5. Now I'm working with IdSMTP and IdMessage. But found some issues in them work. And find information that in late version, for example in 10.5.9 this problem has gone. But on Indy official site I can't find downloads link.
2 Answers
But on Indy official site I can't find downloads link.
Go to http://www.indyproject.org
Click on Indy.Sockets (VCL)
Click on Downloads
Click on Version 10
Click on Development Snapshot
Click on Development Snapshot (again)
Click on Indy via SVN, Fulgan.com, or precompiled binaries.
You can check out Indy from the public subversion repository.
Download Delphi 10.2 Iso
Detailed instructions are at http://www.indyproject.org/sockets/download/svn.en.aspx