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40 lines
1.7 KiB
Plaintext
40 lines
1.7 KiB
Plaintext
The '''PUT #''' TCP/IP statement sends unformatted(raw) data to an open connection using a user's handle.
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{{PageSyntax}}
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:: '''PUT ''#handle'', , ''data'' '''
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{{Parameters}}
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* The ''handle'' value is returned by the [[_OPENCLIENT]], [[_OPENHOST]] or [[_OPENCONNECTION]] '''QB64''' functions.
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* The ''data'' can be any variable type value. Literal values are not allowed.
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<center>'''Communicating using unformatted/raw streamed data:'''</center>
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* Benefit: Communicate with any TCP/IP compatible protocol (eg. FTP, HTTP, web-pages, etc)
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* Disadvantage: Streamed data has no 'message length' as such, just a continuous bunch of bytes all in a row. Some messages get fragmented and parts of messages can (and often do) arrive at different times.
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* The position parameter (between the commas) is not used in TCP/IP statements as all data is streamed consecutively.
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<center>'''Your program MUST cater for these situations manually.'''</center>
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{{WhiteStart}}''Example: string variable b$'s length is adjusted to the number of bytes read.''
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{{Cb|PUT (TCP/IP statement)|PUT #}}client, , a$ 'sends data (this could be a string, variable array, user defined type, etc)
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{{Cb|GET (TCP/IP statement)|GET #}}openconn, , b$ 'reads any available data into variable length string b$
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{{Cb|GET (TCP/IP statement)|GET #}}openconn, , x% 'reads 2 bytes of data as an integer value.
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{{WhiteEnd}}
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: ''Explanation:'' Checking [[EOF]](o) is unnecessary. If 2 bytes are available, they are read into x%, if not then nothing is read and [[EOF]](o) will return -1
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''See the example in [[_OPENCLIENT]]''
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''See also:''
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* [[GET (TCP/IP statement)]], [[PUT|PUT #]]
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* [[_OPENCLIENT]], [[_OPENHOST]], [[_OPENCONNECTION]]
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{{PageNavigation}}
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