I am starting out so excuse my naive question. I researched on how to test if REST response is indeed is JSON/ or in JSON format. I get two options either to use the plugin JSON Path Assertion or regular expression. But I am not sure how to use the plugin to validate if the response is in JSON format. I do not want to test any specifics of the results. How can I do it in JMeter?
Beanshell Post Processor:
import org.json.JSONException;
import org.json.JSONObject;
try
{
JSONObject obj = new JSONObject(prev.getResponseDataAsString());
//valid json
}
catch(Exception e)
{
// not a valid json
}
You might need this jar in the lib folder. You migt not need this if you already have jmeter plugins for json path extractor etc.
JSON Path Extractor:
If the response is not in the valid json format, then the value of json will be NOT_JSON. Otherwise it will have the json doc as string.
Related
I am calling a login API from JMeter which return result in json format. For this API call I am getting expected result however the json response contains  character. In the request I have added, DataType:json and Content-Type: application/json;charset=utf-8.
Any advice.
Output Json Response
This is UTF-8 Byte Order Mark, your server responds this way so you might want to raise an issue against your application if this is not expected.
If your application functions as designed you can remove the BOM from the response using i.e. JSR223 PostProcessor and Groovy language, the relevant code would be something like:
def BOM = '\uFEFF'
def responseData = prev.getResponseDataAsString()
if (responseData.startsWith(BOM)) {
responseData = responseData.substring(1)
}
prev.setResponseData(responseData.getBytes('UTF-8'))
Check out Apache Groovy - Why and How You Should Use It for more information on Groovy scripting in JMeter
I am getting Json as a response.
Instead of using multiple jsonPath_assertion I want to check it in single beanshell.
Each time I am getting Response with different values.
I would suggest using JSR223 Assertion and Groovy language instead.
Groovy has built-in JSON support so you will be able to use JsonSlurper class to parse the response like:
def json = new groovy.json.JsonSlurper.parseText(prev.getResponseDataAsString())
// do what you need here
Besides Groovy performs much better than Beanshell and it is recommended to use it for scripting in JMeter. See Groovy Is the New Black for more information.
You can use beanshell assertion.It will help you a lot.
prev.getResponseDataAsString() will return your json response as a string.
I hope you would be using Jsonpath online evaluator for evaluating json responses.
Suppose if my json online evaluator code looks like this $.items[2].CM_SEQNUMBER
In beanshell assertion i have used
JsonObject jsonobj = JsonObject.readFrom(jsonString);
JsonArray jsonarr = jsonobj.get("items").asArray();
String pickupToCheck=jsonarr.get(2).asObject().get("CM_SEQNUMBER").asString();
Similarly you can verify your JSON data without using multiple JSONPath Extractor using single beanshell assertion.
I need to pass a data from a json response to the subsequent request's Post Body data however it is not working, something is going wrong.
First request returns the JSON in response body which looks like this:
"accessToken":[{"idToken":"eyJ05C3RU","token":"159c82d30ec3123e873ab989cc"}]
0000000
I have to extract 'accessToken' value to pass it to the next request's post bodydata (not under parameter tab of the request, it has to pass to BodyData tab of the next request)
I have created to JSON path extractors for the first request where getting response data with these values.
1JSON path extractor: $..accessToken[0].idToken
passed this in json path expression:$..accessToken[0].idToken
in the request of next request: { "idtoken": ${idToken}}
view results in tree:
shows post data as request:
POST data:{ "idtoken": ${idToken}}
response data:
omething broke!SyntaxError: Unexpected token $
at `Object.parse (native)`
Please help to resolve the issue. it will be really helpful.
Most likely your JSON Path expression is wrong or response isn't valid JSON.
You can fall back to Regular Expression Extractor which is not that handy, but will work for any text response, the relevant configuration would be:
Apply to: same as for JSON Path extractor
Reference name: idToken
Regular Expression: "idToken"\s?:\s?"(.+?)"
Template: $1$
Demo:
Reference material:
JSON Path Getting Started - if you want to continue with the JSON Path Extractor (double check that your response is a valid JSON using i.e. http://jsonlint.com/)
Using RegEx (Regular Expression Extractor) With JMeter - if you would like to go the regular expressions way
Thanks for all the help. I am able to overcome my issue by using JSON path expression extractor in the next request body as "idtoken": "${idToken_1}".
I want to extract value of the parameter sent through post request in jmeter.
I know the use of regular expression for extracting response value or request URL but here I would like to extract the value of post request.
I've been thorough how to extract value from request in Jmeter but it didn't worked.
Not sure why do you need it as given you sending "something" you should already have that "something" hence you don't need to extract it, however here you go:
In order to save 1st parameter value (or the whole post data if you use "Body Data" mode):
Add Beanshell PostProcessor as a child of the HTTP Request.
Put the following code into the PostProcessor's "Script" area:
String request = ctx.getCurrentSampler().getArguments().getArgument(0).getValue();
vars.put("request", request);
You will be able to access extracted value as ${request} where required.
Clarifications:
ctx - shorthand for JMeterContext class instance
getCurrentSampler() - in case of HTTP Request sampler stands for HTTPSamplerProxy
See How to Use BeanShell: JMeter's Favorite Built-in Component guide for more information on using JMeter and Java API from Beanshell test elements in your JMeter test.
I added a Beanshell PostProcessor in my http request with following code.
import org.apache.jmeter.config.Argument;
import org.apache.jmeter.config.Arguments;
Arguments argz = ctx.getCurrentSampler().getArguments();
for (int i = 0; i < argz.getArgumentCount(); i++) {
Argument arg = argz.getArgument(i);
String a = arg.getValue();
vars.put("EMAIL",a);
}
Explanation: I get a my request as a json and put it in EMAIL. Now I can use EMAIL as a variable in my other request.
Then, I added a jp#gc Json Path Extractor and I applied it to a Jmeter Varaible.
Now, Email will be used as variable, which contains my json request and I can extract using jsonPath Extractor.
An easy way to do this is using the JSON Path Extractor.
There are just
For the example you gave
{ "data" : { "name" : "john_doe", } }
'Variable Name: YourNewVar'
'JSON Path: $.data.name'
Should work, but you may need to do some experimenting.
You may want to add a "debug sampler" (its one of the standard samplers) and put in its title $YourNewVar so you can see what is being extracted.
Beanshell and "Regular Expression Extractor" will work, of course, but may be a little harder to use if you are not familiar with them.
I've been trying to figure out how to configure a simple JSON Path extractor (provided on jmeter-plugins) and where to put it (inside an Http sample, outside...)
As you can see, ${expiredaccesstokenerror} is empty.
In order to fill this variable, I'm trying to extract a vallue from body response:
As you can see I'm trying to extract from json body content like:
{
"error_description":"Access token expired",
"suberror":"expired_accesstoken",
"error":"invalid_grant"
}
So, I've set JSON extractor for extracting $.suberror, however, it's always empty.
${expiredaccesstokenerror} in sampler is trying to get variable before request or response. In post processor you set the variable expiredaccesstokenerror but it's too late for displaying.