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39 lines
1.6 KiB
Markdown
39 lines
1.6 KiB
Markdown
The **PUT #** TCP/IP statement sends unformatted(raw) data to an open connection using a user's handle.
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## Syntax
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> **PUT *#handle*, , *data* **
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## Parameters
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* The *handle* value is returned by the [_OPENCLIENT](_OPENCLIENT), [_OPENHOST](_OPENHOST) or [_OPENCONNECTION](_OPENCONNECTION) **QB64** functions.
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* The *data* can be any variable type value. Literal values are not allowed.
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**Communicating using unformatted/raw streamed data:**
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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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**Your program MUST cater for these situations manually.**
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```text
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*Example: string variable b$'s length is adjusted to the number of bytes read.*
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PUT #client, , a$ 'sends data (this could be a string, variable array, user defined type, etc)
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GET #openconn, , b$ 'reads any available data into variable length string b$
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GET #openconn, , x% 'reads 2 bytes of data as an integer value.
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```
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> *Explanation:* Checking [EOF](EOF)(o) is unnecessary. If 2 bytes are available, they are read into x%, if not then nothing is read and [EOF](EOF)(o) will return -1
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*See the example in [_OPENCLIENT](_OPENCLIENT)*
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## See Also
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* [GET (TCP/IP statement)](GET-(TCP-IP-statement)), [PUT #](PUT)
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* [_OPENCLIENT](_OPENCLIENT), [_OPENHOST](_OPENHOST), [_OPENCONNECTION](_OPENCONNECTION)
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