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The send statement and the xauth statement are called switching statements, because they imply an immediate switch statement based on the server response. The switch statement contains case statements very similar to Java and C++ case statements, except the conditions are not constants checked against a single expression.
A switching statement such as send and xauth is always immediately followed by a set of case statements between curly braces { <case statements> }. The set of case statements may be empty, in which case there is nothing between the curly braces, but the braces must be present.
Example of Switch Statement:
The send statement takes a single argument, the string to be sent to the server. The string is expanded before it is sent. The maximum legal length for the expanded string is about 512 bytes, the maximum length of an FTP line. The send command then waits on a response from the server and evaluates the response against the conditions in each of the enclosed case statements.
The xauth statement takes no arguments. It examines the welcome banner for an xauth invisibly supplied by Progress WS_FTP server. If it is not connected to Progress WS_FTP server or cannot find the invitation, xauth does nothing, and the case statements are not evaluated. If it does find the invitation, it encodes the user ID and password and sends the xauth command to the server. It then waits on the response and evaluates it against the case statements just as the send command does.
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