Name
ses_read_line — Read a line of character data from a TCP session.
Synopsis
varchar ses_read_line ( |
in ses any , |
| in throw_exception_on_eof integer , | |
in binary_mode integer
); |
Description
This function is used to read a line of character data from an
open TCP session. This function will read characters until it
reaches an end of line up to a maximum of 1024 characters. The
session can be passed as a session_handle. If the session_handle is
omitted then execution is in current session/VSP context and will
read from the open HTTP session. Ses_read_line() will suspend execution while
attempting to read from the session until the timeout period of 100
seconds expires. When the timeout expires an error will be produced
to indicate that the operation was unsuccessful.
Parameters
ses
Optional session handle. If none is supplied the current TCP client session is assumed. If this is NULL then the function will read from the string session to be sent to the client upon request completion.
throw_exception_on_eof
Controls whether to throw an error if there is a problem reading from the session or simply return null in text mode or what ever content has has been read so far in binary mode. If this parameter is set to 1, then an error will be thrown. If this parameter is set to 0 then either null or remaining content will be returned as above.
binary_mode
Instructs the function to be in binary or text mode.
| Binary mode: the function reads a maximum of 1024 bytes and returns as much as it read as a varchar. |
| Text mode: the function reads up to 0x0A, it will trim all the [0x0A|0x0D] characters at the end of the string and return it as varchar. |
Return Types
The characters read from the session are returned from this function.
Examples
Example24.371.Simple demonstration of reading from the HTTP session
This example reads the first line of the session and outputs the contents. This code can be run from a vsp file.
<p>Some text</p>
<?vsp
declare xx any;
xx := ses_read_line (NULL);
http (sprintf ('length is %d, "%s"', length (xx), xx));
?>