mirror of
https://github.com/QB64Official/qb64.git
synced 2024-08-22 06:45:09 +00:00
51 lines
No EOL
2.2 KiB
Text
51 lines
No EOL
2.2 KiB
Text
'''GET''' reads unformatted (raw) data from an open TCP/IP connection opened with [[_OPENCLIENT]], [[_OPENHOST]] or [[_OPENCONNECTION]].
|
||
|
||
|
||
{{PageSyntax}}
|
||
''Syntax 1:''
|
||
: '''GET''' ''#handle'', , ''b$''
|
||
* Reads any available data into variable length string b$ (b$'s length is adjusted to the number of bytes read, so checking EOF is unnecessary) using the handle return value from [[_OPENCLIENT]], [[_OPENHOST]] or [[_OPENCONNECTION]].
|
||
|
||
|
||
''Syntax 2:''
|
||
: '''GET''' ''#handle'', ,''x%''
|
||
* Reads an integer. If 2 bytes are available, they are read into x%, if not then nothing is read and [[EOF]](handle) will return -1 (and ''x%'''s value will be undefined) using the handle return value from [[_OPENCLIENT]], [[_OPENHOST]] or [[_OPENCONNECTION]].
|
||
|
||
|
||
==Communicating using unformatted/raw streamed data==
|
||
* Benefit: Communicate with any TCP/IP compatible protocol (eg. FTP, HTTP, web-pages, etc).
|
||
* Disadvantage: Streamed data has no 'message length', as such just the program deals with a continuous number of bytes in a row. Some messages get fragmented and parts of messages can (and often do) arrive at different times, due to the very nature of the TCP/IP protocol.
|
||
* The position parameter (between the commas) is not used in TCP/IP connections.
|
||
* The programmer must cater for these situations manually.
|
||
|
||
|
||
{{PageExamples}}
|
||
''Example:''
|
||
|
||
{{CodeStart}}
|
||
{{Cl|PUT|PUT #}}c, , a$ ' sends data
|
||
{{Cl|GET|GET #}}o, , b$ ' reads any available data into variable length string b$
|
||
{{Cl|GET|GET #}}o, , x% ' if 2 bytes are available, they are read into x%
|
||
{{CodeEnd}}
|
||
|
||
''Explanation:''
|
||
* Data could be a string, variable array, user defined [[TYPE]], etc.
|
||
* b$'s length is adjusted to the number of bytes read. Checking [[EOF]](o) is unnecessary.
|
||
* If 2 bytes are not available for the x% integer then nothing is read and [[EOF]](o) will return -1
|
||
|
||
|
||
|
||
===More examples===
|
||
* ''See the examples in [[_OPENCLIENT]] or [[Email Demo]].''
|
||
|
||
|
||
|
||
{{PageSeeAlso}}
|
||
* [[PUT (TCP/IP statement)]], [[INPUT (TCP/IP statement)]]
|
||
* [[_OPENCLIENT]], [[_OPENHOST]]
|
||
* [[_OPENCONNECTION]], [[GET|GET #]]
|
||
* [[IP Configuration]]
|
||
* [https://curl.haxx.se/ cURL], [[WGET]] (HTTP and FTP file transfer)
|
||
|
||
|
||
{{PageNavigation}} |