8.5

l Enable server for SSLrequests:This enables secure communication between the browser and the
server via HTTPS. By enabling this option, you will need to provide for the proper certificates, key and
password. While this configuration is beyond the scope of this document, there are plenty of resources
on the Internet to explain these systems.
l Serve HTTPresources:This is where you enable static resources in PReS Workflow. When
enabling this option, the HTTPserver will always look in the Resource Folder for files requested
inside of the Resource action name as a folder. This means that, if your Resource folder is
c:\PReS\http and your Resource action name is static, pointing your browser to
http://127.0.0.1:8080/static/css/style.css will immediately load and return the file
c:\PReS\http\css\style.css . This does not require any process to work - everything is
handled directly by the HTTPServer Input and files are returned immediately. This feature is very
useful when dealing with stylesheets, images, browser JavaScript, or static html files that do not
require any processing.
Technical
As of PReS Workflow 8.1, it is now possible to serve a default HTMLfile when no action is specified,
for example http://localhost:8080/ . This is done by creating an index.html file in the Resource
Folder defined above. However, resources called by this index.html must still use the Resource
action name, for example a stylesheet would still point to
http://127.0.0.1:8080/static/css/style.css or more simply static/css/style.css.
You also need to take into consideration the options inside each of your processes that start with the
HTTPServer Input task, as they will greatly impact how this process responds. In the process' properties,
the following options will modify HTTPbehavior:
l Self-Replicating Process:This option is critically important when dealing with HTTPprocesses, so
check it now. Basically, this means that when HTTPrequests are received, the process will duplicate
itself up to the specified maximum number, in order to simultaneously (and asynchronously)handle
multiple requests. See " Process Properties" on page592 for more details.
l As soon as possible:This option needs to be checked, otherwise requests will not be handled as
they come in (this option is meant to be used on scheduled processes that run at intervals).
l Polling Interval (sec):This option determines how much time the HTTPServer Input waits between
the moment it finishes processing a request and the moment it picks up a new request. This should be
put at 0 in order to process requests as soon as possible, meaning immediately.