using file_open command

shanem

Hi,
Just wondering if anybody has ever used the file_open command to open files for reading and/or writing? Im trying to use it at the moment to open a web page but not having much success. Has anybody any tips on what to do? I have done this before using different languages and it has always been fairly straightforward. I'm pretty new to this language, maybe there is something I have missed? This is what I have tried:

define_constant
char filePath[50] = 'http://www.******.ie' //file to open
integer ioFlag = 1 //read only

define_variable
slong handle
.
.
.
.
handle = file_open(filePath,ioFlag) //open the file

Problem is handle returns a -5 which means a disk I/O error.
I was talking to tech support about this and they're not really sure why its not working.

DHawthorne

I don't think the FILE_OPEN command supports the HTML protocol. It's meant for a local file on your master's RAM drive. Opening HTML on the web is very different than opening a local file. The HTML protocol requires a request to the HTML server, and the server responds by sending the file, which is then cached to your local drive. FILE_OPEN won't do any of that. You will probably need to mimic the HTML commands in a TCP connection, save it locally, and then use FILE_OPEN. Depending on what you are trying to do, it might be just as easy at that point to parse the HTML stream directly.

Chip Moody

If you're looking to get data from a web server, you'll need to look into the IP_CLIENT_OPEN command in NetLinx. Once you have an open TCP/IP connection to the web server, (you'll get an online event for the device you create for the connection) you need to send HTTP commands to request the document/resource you're looking for.

If you want some source code to mull over, say the word. If you can give more of a clue as to what you're doing, that would help...

- Chip

Chip Moody

P.s.

The file operation commands in NetLinx work with the "Disk On Chip" on the original masters, and the compact flash cards (formatted as a disk) on the NI's and ME-260s...

- Chip

shanem

Thanks for your help guys, I got it now.

Cheers,
Shane