Downloading a file from the internet

[skootles]

Hey, I'm just wondering if it's possible in turing to download a file from the internet? I wanted to have a section in my program that would download the latest update when you click a button, but I haven't had any experience with Turing and the internet.. so is it possible?

[neufelni]

code:

if not Sys.Exec ("http://www.google.com"/*put any website here */) then     put "Error" end if

[/quote]

[skootles]

Thanks , that will work, but I'm just wondering how would I use that to download .txt and image files too? Because when I just use that, they open up in IE.

[Tony]

You'd have to use the Net. module like over here

[skootles]

Alrighty, well I have this, which should download a google image (just for testing purposes):

code:

var url : string := "http://mail.google.com/mail/help/images/logo.gif" var count : int := 0 var progress : int var netStream : int var net_line : char netStream := Net.OpenURLConnection (url) if netStream <= 0 then     put url, " could not be located."     return end if var filenum : int open : filenum, "test.gif", write loop     exit when eof (netStream)     count += 1     locate (1, 1)     progress := round ((62000 - count) / 1000)     put "Downloading Count Down:", progress     get : netStream, net_line     write : filenum, net_line     end loop Net.CloseConnection (netStream)

I just did a quick mod to that other program. I just don't know why this doesn't work

[r0ssar00]

whats the error message, something about illegal char in string, if im correct?

[skootles]

Sorry for double post, but I get an error in the bottom right of my screen that says "General Protection (seg" (it gets cut off) that displays for about a milisecond, then the program terminates.. I really have no clue whats going wrong

[Tony]

a crude approach to step-testing would be to paste your program into a new file one line at a time, and see how far your code works before you get your General Error

Once you know what line of code produces the error, it will be easier for you and others to figure out the cause

[skootles]

Hmm.. Well, when I run the original program:

code:

procedure playMP3     loop         Music.PlayFile ("test.mp3")     end loop end playMP3 procedure streamMP3 (url : string)     var count : int := 0     var progress : int     var netStream : int     var net_line : char     netStream := Net.OpenURLConnection (url)     if netStream <= 0 then         put "Unable to download mp3 ", url, "!"         return     end if     var fileNo : int     open : fileNo, "test.mp3", write     loop         exit when eof (netStream)         count += 1         locate (1, 1)         progress := round ((62000 - count) / 1000)         put "Downloading Count Down:",progress         get : netStream, net_line         write : fileNo, net_line     end loop     Net.CloseConnection (netStream)     close : fileNo     playMP3 end streamMP3 streamMP3 ("http://72.29.76.231/~eclipti/turing/test.mp3")

I get the error that appeared in the bottom of my screen, but as a regular turing error. (The error is "General protection (segmentation) fault", and it highlights the line "Net.CloseConnection (netStream)".

When I run "my program", and trace it, it stops at "exit when eof (netStream)", and it doesn't terminate the program.

[skootles]

Whoops, forgot that I had over half of it commented
When I trace it, it give me the same error as the other program.

[ecliptical]

The error you're having is a turing enternal error...i wrote my own GetUrl Module sending my own HTTP headers and everything and accessing Google still crashed turing...if you're testing it's best not to test with Google...use some other website...i know yahoo works...

[Tony]

some sites (including CompSci.ca) check to see if connection is made by a browser (FireFox, Safari, IE, etc) or a bot, and respond differently. Turing's request would be identified as a bot, and some sites might break on you.

[skootles]

Ahh, that makes sense. However, I used to have a program like this in VB, that did the same thing. I accidentally deleted the project files, but I wanted to try and make it in a language I know fairly well anyways. Part of that program downloaded sets of image files (from my hosting), and when I tried downloading the same sets, it didn't work. So wouldn't it have detected the other program as a bot?

[Tony]

I can't say for sure

you could test things out locally by setting up your computer to act as a server. This way you know exactly what's happening on serverside as well

[skootles]

Well, that sounds like it would take some advanced knowledge.. so I don't think it would do me any good unfortunately.