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56 lines
2.2 KiB
Plaintext
56 lines
2.2 KiB
Plaintext
The '''_OPENCONNECTION''' function open's a connection from a client that the host has detected and returns a status handle.
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{{PageSyntax}}
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:{{Parameter|connect_handle}} = {{KW|_OPENCONNECTION}}({{Parameter|host_handle}})
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{{PageDescription}}
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* Valid handles returned are usually negative numbers.
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* If the syntax is correct but they fail to begin/connect a handle of 0 is returned.
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* Always check if the handle returned is 0 (failed) before continuing.
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* {{KW|CLOSE}} #{{Parameter|connect_handle}} closes the connection. Failed connections({{Parameter|connect_handle}} = 0) do not need to be closed.
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* As a '''Host''' you can check for new clients(users). Each will have a unique connection handle.
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* Creates an [[ERROR Codes|ILLEGAL FUNCTION CALL]] error if called with a string argument of the wrong syntax.
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* Handle values can be used as the open number by {{KW|INPUT (TCP/IP statement)|INPUT #}} or {{KW|GET (TCP/IP statement)|GET #}} read statements and {{KW|PUT (TCP/IP statement)|PUT #}} or {{KW|PRINT (TCP/IP statement)|PRINT #}} write statements.
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{{PageExamples}}
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''Example:'' Using the {{KW|_OPENCONNECTION}} new client return with {{KW|INPUT (TCP/IP statement)|INPUT}} # or {{KW|GET (TCP/IP statement)|GET}} # message or data reads.
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{{CodeStart}}
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host = {{Cl|_OPENHOST}}("TCP/IP:8080")
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{{Cl|DO}}
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newclient = {{Cl|_OPENCONNECTION}}(host) ' monitor host connection
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{{Cl|IF...THEN|IF}} newclient {{Cl|THEN}}
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{{Cl|SLEEP}} 1 ' wait one second for data to arrive
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{{Cl|INPUT (TCP/IP statement)|INPUT}} #newclient, a
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{{Cl|PRINT}} a
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{{Cl|CLOSE}} #newclient ' close after each read
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{{Cl|ELSE}} : {{Cl|_DELAY}} .05 ' share resources with other programs (20 loops per second)
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{{Cl|END IF}}
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{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} <> "" ' any keypress quits
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{{Cl|CLOSE}} #host
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{{Cl|SYSTEM}}
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{{CodeEnd}}
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''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.
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'''Note: When sending data, the client should wait about 3 seconds before closing their connection!'''
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{{PageSeeAlso}}
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*{{KW|_OPENHOST}}, {{KW|_OPENCLIENT}}
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*{{KW|_CONNECTED}}, {{KW|_CONNECTIONADDRESS}}
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{{PageNavigation}} |