[clif] Re: httpInjector save form fields??

[Bruno Dillenseger <bruno.dillenseger@xxxxxxxxxxxxxxxxxx>]

Marc van Dam_new wrote:
> Hello Bruno,
>   
Hello Marc,

I'm pleased that your mail is explicitely addressed to me, but probably 
it would be more correct to talk to the CLIF community... ;-)
> Urlier I emailed some questions, for any reason the question 
> stayed unanswered. (maybe because I used hotmail.com address??)
>   
I don't know, but I actually don't remember having read from you before.
> Question: Is it possible in HttpInjector to get variables
> from specific (hidden) form content??
>
> For example: 
> I need to do 1x GET 1x POST command.
>
> In the GET command a website is received with for example 
> following form:
>
> <form action="test.htm" method="get" name="mytest">
>
> Username: <input name="username" type="text">
> Password: <input type="password" name="textfield">
>
> <input name="MYFIELD1" type="hidden" value="CHANGING CODE">
>
> <input type="submit" name="Submit" value="Submit">
> </form>
>
> I need a variable to store "value" of MYFIELD1. So I can later
> re-use it when I use POST. 
>
> Is this in any way possible with Clif??
>   
In my understanding, what you want to do is to extract some value from 
the received HTML page and to insert this value in your next request.
The general schema to do this is to put the result of your GET in a 
variable (option in the GET parameters page), then to set a 
StringHandler plug-in's value with this variable using the 
${httpPluginId:my_variable_for_last_loaded_page}, then to use this 
StringHandler to extract the value, for instance based on a regular 
expression. An alternative is to implement this parsing feature in an 
HTML-specific way directly in the HttpInjector. Finally, you send your 
POST method inserting the extracted value at the right place with a 
variable expression ${parserId:value}

The thing is both ways are possible but not implemented yet.

If you are a Java developer, it won't take long for you to extend the 
StringHandler or the HttpInjector ISAC plug-in so that it can parse the 
last loaded HTML page and extract the value. This would be typically 
done by wrapping Java's StringBuilder API and the regular expression 
supported by package java.util.regex, or the included HtmlParser 
library. It would be an interesting contribution. If you are not a Java 
developer, then a request for feature should be created in the Forge to 
induce someone in the community to commit such an enhancement, which is 
definitely something we need to have in CLIF.
>  
> Second question: the httpInjector is limited for each Injector for
> a maximum of 200 users. Is there a reason for that?
>   
There is no limit. I've already - and accidentally - been up to 12 
millions virtual users with the HttpInjector on a single laptop (a crazy 
experiment!). How do you find such a limit?
Just in case it helps: consider setting the thread pool size (see the 
section about ISAC execution engine in the user manual).

Kind regards,
-- Bruno.