Need to read a simple string stream from an IP address

[AlanTheBeast]

Hi,

I don't use Lazarus, just FPC command line (via Lightweight).

I have a nifty app on my iPhone called SensorLog and it will output whatever sensor data from the phone one sets up to an IP address and a set port.  I can telnet that to the terminal such as
 
$ telnet 192.168.1.22 60444
or
$ telnet 192.168.1.22 60444 > a_file.csv

but I can't get a named pipe or directed pipe to read in the stream.

Is there some "light" unit that will allow me to read the stream?

Something like

     - set an IP address and port as a textfile or a stream
     - read from it until dizzy
     - close when done


Thanks

[Phil]

Not sure if I follow.

Does an HTTP request using FPC's TFPHTTPClient class work? (fphttpclient unit)

[AlanTheBeast]

I don't know Phil - but now that you've pointed me at that unit I'll see what I see!

[Phil]

I might have misunderstood what you're doing.

Are you using telnet on a computer as a way to read from the iOS app sends?

I think that for an HTTP request to work, the iOS app would need to act like a Web app running under a Web server. That is, when it receives a request for data, it returns it in a response. From the description on the app store, it appears as though it SensorLog can do that:

https://itunes.apple.com/us/app/sensorlog/id388014573?mt=8

I believe iOS includes a Web server (Apache) because I've seen an iOS app that works like a Web app. Perhaps SensorLog is using the server to service the HTTP requests.

[Thaddy]

Http should work since it is explicitly supported by SensorLog. see docs in appstore that reads: per HTTP GET/POST.

In that case it should be very easy with TFPHttp and trivial with synapse.

[edit]
The httpget example in /packages/fcl-web/examples/httpclient/ works straight out of the box, tested against an apache server.
usage: httpget <url> <filename>

With synapse use:

Code: Pascal  [Select][+][-]

1. function HttpGetText(const URL: string; const Response: TStrings): Boolean;// in httpsend.pas

There's TCP/IP only streaming client example in this blogpost by forum member leledumbo:
http://pascalgeek.blogspot.nl/2012/06/encryption-decryption-and-asynchronous.html
Scroll-down a bit.