Library: TCP/IP client and server support (OMTCP) legacy Include: omtcp.xin

Return type: String Returns:

Declaration

  define external stream function tcp-get
                  value tcp-connection Connection
             size value integer        MinRead    optional
      variable-to value integer        MaxRead    optional
          timeout value integer        ms         optional

Argument definitions

Connection

is a tcp-connection object representing an existing connection.

MinRead

is the minimum number of characters to read.

MaxRead

is the maximum number of characters to read.

ms

is how long the function will wait for at least one character, expressed in milliseconds.

Use tcp-get to return characters received from a source on the TCP connection object.

Requirements

You must include the following line at the beginning of your OmniMark program:

  include "omtcp.xin"

Connection must represent an existing connection (else external exception TCP05).

There must not be an active external source derived from Connection with tcp-source (else external exception TCP04).

If MinRead is specified, it must have a value of -1 or greater (else external exception TCP03).

If MaxRead is specified, it must have a value of -1 or greater (else external exception TCP03).

If both MinRead and MaxRead are specified, MinRead must have a value less than the value of MaxRead (else external exception TCP03).

Usage Notes

If an error occurs during the read, external exception TCP11 is thrown.

If the read operation times out, external exception TCP07 is thrown.

If neither MinRead nor MaxRead is specified the function reads as many characters as are available, as long as there is at least one character.

Specifying value of -1 for either MinRead or MaxRead indicates no limit. (This is the default value for both parameters.)

Sequential uses of tcp-get and tcp-source are allowed. It is also guaranteed that tcp-get will only ever read the characters it returns from a source. Any following characters are available to the next tcp-get or tcp-source.

Example #1

  local tcp-connection Connection-1

     set Connection-1 to tcp-connect on "localhost" at 5300
     output tcp-get Connection-1

Example #2

     output tcp-get tcp-connect on "localhost" at 5300
        size 10

Other Library Functions    tcp-accept-connection    tcp-connect    tcp-connection    tcp-create-service    tcp-destroy-service    tcp-disconnect    tcp-get    tcp-has-characters    tcp-is-connected    tcp-is-version-compatible    tcp-library-version    tcp-peer-ip    tcp-peer-name    tcp-port    tcp-put    tcp-service    tcp-set-buffering    tcp-signal-source-end    tcp-sink    tcp-source

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