iHttpOpen Redirect

CadJoe · May 05, 2024, 01:13:39 PM

Hi,

I'm struggling to figure out a work around for some network devices queries.

I am hitting their internal web gui, and extracting info by reading a list of IPs.

A very large majority of them I see redirect the default IP address to a sub page w/o HTML extension.
It doesn't seem to bother iHttpOpen, and reads the home page just fine.

However, there is ONE model that redirects to a sub page with an extension of IP/Device_Info.html.
example: 10.22.33.44/Device_Information.html

When I hit that IP with a standard web browser it redirects to the Device_information.html just fine.

If I manually force the optional sub URL in the iHttpInit using referrer option, it queries the page just fine.
But if I can't query the home page to determine the model number, then I don't know to use the URL referrer option.

I'm getting a 200 OK on the read w/o the option, and about 94 bytes of data read.
The typical read is about 5 to 10k bytes, incl this device when I use the sub URL with .html.

Is there a way for iHttpInit or iHttpOpen to tell me where the site sent me, so I can change the iHttpInit to hit that redirected url directly ?

Thanks,

CadJoe
WinBatch, Gotta Love It !!

CadJoe · May 05, 2024, 02:20:53 PM

So I tried this to see what it showed.

iOptionGet(datahandle,"url")

still shows root IP address.

Thanks,
CadJoe

WinBatch, Gotta Love It !!

CadJoe · May 05, 2024, 02:43:20 PM

so I did an iRead on it to see what the 94 bytes was.

<html><head><META HTTP-EQUIV="REFRESH" CONTENT="0; URL=Device_Information.html"></head></html>

Not sure why the redirect works on all the other newer devices, and why iHttpOpen doesn't read this one.

Is there anyway to detect this w/o having to start a new handle / connection / open ?

Thanks,
CadJoe

WinBatch, Gotta Love It !!

td · May 06, 2024, 05:19:39 PM

You likely need a browser or a programmable equivalent to handle "HTTP-EQUIV" redirect pragmas much like you need for processing javascript. The WinInet extender is not a browser. It handles HTTP verbs and FTP commands.

CadJoe · May 06, 2024, 07:16:47 PM

ok, thanks.
I just threw it into a binary buf, and did a BinaryIndexEx search for the redirect.

If it exists, I close the buf, and just go directly to the .html and throw into buf again, then proceed like normal.

Thanks,

CadJoe
WinBatch, Gotta Love It !!

td · May 07, 2024, 07:15:34 AM

Good plan.

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iHttpOpen Redirect

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