The JMeter proxy server was of great interest to record the
browsing routines needed to implement each task, but there
is still an important point, which is related to the dynamic
information that is generated during the browsing session.
This dynamic information allows the browsing control, record
session data, and other elements used by the application.
These elements are generated using varying parameters such
as the date and time. For these reasons, the use of a extractor
of regular expressions was needed to obtain such dynamic
information. Figure 2 presents a screenshot of the regular expressions
extractor for the time a HTTP request is performed,
where we can assign a name to the regular expression, a
reference name (Nombre de referencia) which will be the name
of the variable which will keep the extracted value, the values
that will be retrieved (Plantilla), and the regular expression
itself. Also, Figure 3 presents a HTTP request that sends a
variable named time whose value has been obtained using the
aforementioned regular expression.