How to parse response of sample1 to create new sample in JMeter

Question

I use JMeter to do performance test of web server. My test case is as following:

step1: send file update request to server.
step2: server will return some files URL as html response
step3: client need to create new request with the URL returned in step2,thus need to parse 
the response of step2.

I am new to JMeter, and do not know how to implement it. I basically learned JMeter about the pre-processor and post-processor, but still no clue about how to do.

Answer 1

Ok let's start before the first step :

Right click -> Add -> Threads (Users) -> Thread Group

• Now the actual first step (If you use REST) :

Add -> Sampler -> Http Request

You have at the bottom part Send Files With the Request. You can add file attachment if that is what you asked.

• Extracting response from the server :

Let's assume your response is this :

<Response>
  <name>StackOverflow.com</name>
  <url>http://stackoverflow.com/questions/11186423/how-to-parse-response-of-sample1-to-create-new-sample-in-jmeter</url>
</Response>

Here is what you do :

Right click on The http request you previously added (in step 1) -> Post Processors -> Xpath Extractor

Reference Name is the name of the variable in which you want to store the value. Let's name it url. And Xpath query is Response/url or //Response/url if you get more response tags. If you want the first one //Response[1]/url and so on..

• Repeat step 1 (copy/paste sampler and remove the Xpath Extractor you don't need it anymore), and change the Server Name or IP to ${url} which is the value previously returned.

And Voila there you go. Let me know if you got more specific questions. Jmeter is fun.

Per Grace comment :

Wants to extract https://192.168.100.46/updserver/download?action=signature_download&token=


Out of response data :

<responseData class="java.lang.String">&lt;html&gt;&#xd;
&lt;body&gt;&#xd;
ERROR=0&#xd;
MSG=N/A&#xd;
FILELIST=1555;1340778737370;1526545487;&#xd;
VERSION=1.002&#xd;
URL=https://192.168.100.46/updserver/download?action=signature_download&amp;token=&#xd;
INTERVAL=0&#xd;
&lt;/body&gt;&#xd;
&lt;/html&gt;&#xd;
</responseData>

This should be pretty simple. Add a post processor -> Regular Expression Extractor and put the following :

Reference Name : url 
Regular Expression : (http[\S]+)
Template : $1$
Match No. (0 for Random): 1

So now you have url variable that you can use further in your test as ${url}. Let me know if that works for you. I tested with dummy sampler and it works for me.