mirror of
https://github.com/QB64Official/qb64.git
synced 2024-08-22 10:15:09 +00:00
50 lines
No EOL
2.3 KiB
Text
50 lines
No EOL
2.3 KiB
Text
{{DISPLAYTITLE:_OPENCONNECTION}}
|
|
The [[_OPENCONNECTION]] function opens a connection from a client that the host has detected and returns a status handle.
|
|
|
|
|
|
{{PageSyntax}}
|
|
:{{Parameter|connectHandle}} = [[_OPENCONNECTION]]({{Parameter|hostHandle}})
|
|
|
|
|
|
{{PageDescription}}
|
|
* Valid {{Parameter|connectHandle}} values returned are negative numbers.
|
|
* If the syntax is correct but they fail to begin/connect, a {{Parameter|connectHandle}} of 0 is returned.
|
|
* Always check if the handle returned is 0 (failed) before continuing.
|
|
* [[CLOSE]] #{{Parameter|connectHandle}} closes the connection. Failed connections({{Parameter|connectHandle}} = 0) do not need to be closed.
|
|
* As a '''Host''' you can check for new clients (users). Each will have a unique connection handle.
|
|
* Creates an [[ERROR Codes|Illegal Function Call]] error if called with a string argument of the wrong syntax.
|
|
* Handle values can be used as the open number by [[INPUT (TCP/IP statement)|INPUT #]] or [[GET (TCP/IP statement)|GET #]] read statements and [[PUT (TCP/IP statement)|PUT #]] or [[PRINT (TCP/IP statement)|PRINT #]] write statements.
|
|
|
|
|
|
{{PageExamples}}
|
|
''Example:'' Using the [[_OPENCONNECTION]] new client return with [[INPUT (TCP/IP statement)|INPUT]] # or [[GET (TCP/IP statement)|GET]] # message or data reads.
|
|
|
|
{{CodeStart}}
|
|
|
|
host = {{Cl|_OPENHOST}}("TCP/IP:8080")
|
|
{{Cl|DO}}
|
|
newclient = {{Cl|_OPENCONNECTION}}(host) ' monitor host connection
|
|
{{Cl|IF...THEN|IF}} newclient {{Cl|THEN}}
|
|
{{Cl|SLEEP}} 1 ' wait one second for data to arrive
|
|
{{Cl|INPUT (TCP/IP statement)|INPUT}} #newclient, a
|
|
{{Cl|PRINT}} a
|
|
{{Cl|CLOSE}} #newclient ' close after each read
|
|
{{Cl|ELSE}} : {{Cl|_DELAY}} .05 ' share resources with other programs (20 loops per second)
|
|
{{Cl|END IF}}
|
|
{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} <> "" ' any keypress quits
|
|
{{Cl|CLOSE}} #host
|
|
{{Cl|SYSTEM}}
|
|
|
|
{{CodeEnd}}
|
|
|
|
''Explanation:'' The function finds new clients and waits one second to read a message or other data. If a message or data was sent, it displays it on the screen and closes the connection.
|
|
|
|
'''Note: When sending data, the client should wait about 3 seconds before closing their connection!'''
|
|
|
|
|
|
{{PageSeeAlso}}
|
|
* [[_OPENHOST]], [[_OPENCLIENT]]
|
|
* [[_CONNECTED]], [[_CONNECTIONADDRESS]]
|
|
|
|
|
|
{{PageNavigation}} |