Vadim Avkhimenia wrote:
Hello,
I am using Jmeter 5.6.2 to see how my REST API will respond to multiple
requests.
I am trying to replicate the request I made with the python requests
library. The request I am trying to replicate is:
import requests
import json
requests.get('http://[<ipv6>]:<port number>/<endpoint>',
data=json.dumps({'key' : ['value']}))
The REST API I have setup returns the output in the format {'key' :
'value'}.
To try to load test I setup an HTTP Request screen where I filled in the
protocol, server name, port number, path, and content encoding. Content
encoding was set as 'json' but I've tried not setting this field too. In
the 'Body Data' section I pasted '{"key": ["value"]}' . I've also setup a
header manager screen with 'Content-Type' of 'application/json'. I've also
setup a JSON Extractor screen and left everything empty in it, but have
tried in the past to populate the 'Names of created variables' field with
'key'.
When I run my test, the 'View Results in Tree' produces these outputs:
*Sampler result:*
Thread Name:Thread Group Matmul 1-1
Sample Start:2023-11-29 08:58:08 MST
Load time:0
Connect Time:0
Latency:0
Size in bytes:1056
Sent bytes:0
Headers size in bytes:0
Body size in bytes:1056
Sample Count:1
Error Count:1
Data type ("text"|"bin"|""):text
Response code:Non HTTP response code:
java.nio.charset.UnsupportedCharsetException
Response message:Non HTTP response message: json
HTTPSampleResult fields:
ContentType:
DataEncoding: null
*Request:*
GET http://[<ipv6>]:<port number>/<endpoint>
GET data:
[no cookies]
*Response Body:*
java.nio.charset.UnsupportedCharsetException: json
at java.base/java.nio.charset.Charset.forName(Charset.java:529)
at
org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.setupHttpEntityEnclosingRequestData(HTTPHC4Impl.java:1543)
at
org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.handleMethod(HTTPHC4Impl.java:891)
at
org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:646)
at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:66)
at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1311)
at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1300)
at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:651)
at
org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:570)
at
org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:501)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:268)
at java.base/java.lang.Thread.run(Thread.java:834)
*Response headers:*
BLANK
My understanding is that the request is sent successfully, because when I
run the test the button in top right first turns green and then turns red,
but the response can't be parsed because it's in the json format.
Should the JSON Extractor not be able to take care of this?
Please advise.
Thank you.
Regards,
Vadim
You should either leave content encoding blank or use a valid charset
<https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html>
like UTF-8 <https://en.wikipedia.org/wiki/UTF-8> for this.
Also you can just record your Python script using JMeter's HTTP(S) Test
Script Recorder
<https://guide.blazemeter.com/hc/en-us/articles/206733979-Recording-a-user-session-with-the-proxy>,
amend your code to look like:
jmeter_proxy = {
'http': 'http://localhost:8888',
'https': 'http://localhost:8888',
}
requests.get('http://[<ipv6>]:<port number>/<endpoint>',
data=json.dumps({'key' : ['value']}), proxies=jmeter_proxy)
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