jsonPath woes

Gatling (Open-Source)
1

Hi,

I have the JSON below returned from a Restful call, when I use JSONPath tool, I can extract the values I need via:

$…searchResults.file[*].link[0].$

giving me:

[
“http://url1/dv/api/user/id/repository/repo/file?path=%2Fbeans-07.jpg”,
“http://url/dv/api/user/id/repository/repo/file?path=%2Fbeans-07.jpg”
]

But I cannot repeat the same with Gatling’s jsonPath, using the following to check the result of my HTTP call.

.check(jsonPath("$…searchResults.file.link[0].$")
.findAll
.saveAs(“userFiles”))

gives the entire link element as results

No protocol.baseURL defined but provided url is relative : {"$":"“http://url1/dv/api/user/id/repository/repo/file?path=%2Fbeans-07.jpg”,","@rel":“file”}

. However …searchResults.file.link[0].@rel works fine in returning

[
“file”,
“file”
]

Stumped…

Al

{
“searchResults”: {
“@xmlns”: {
“dvi”: “http://internal.x/ns/1.0”,
“$”: “http://y/ns/1.0”,
“a”: “http://z/ns/1.0”
},
“@totalCount”: “26”,
“link”: {
“@rel”: “next”,
“$”: “http://next/next.html”
},
“file”: [
{
“link”: [
{
“@rel”: “file”,
“$”: “http://url1/dv/api/user/id/repository/repo/file?path=%2Fbeans-07.jpg”
}

]
},
{
“link”: [
{
“@rel”: “file”,
“$”: “http://url/dv/api/user/id/repository/repo/file?path=%2Fbeans-07.jpg”
}
]
}
]
}
}

2

Hi,

So, you said that you check this expression $…searchResults.file[*].link[0].$
But in the Gatling, scenario, you don’t use the same one, .check(jsonPath("$…searchResults.file.link[0].$")

Could you try again with .check(jsonPath("$…searchResults.file[*].link[0].$") ?

cheers
Nicolas

3

Hi Sorry, just a typo - it gives the same results:

14:05:00.701 [ERROR] i.g.h.a.HttpRequestAction - No protocol.baseURL defined but provided url is relative : {"$":“http://............","@rel”:“file”}

Al

4

Which version of Gatling are you using ?

5

2.0.0-M3a

thought I’d go with the bleeding edge :wink:

6

We haven’t released the M4 milestone, but we are getting close to it.
Can I ask you to try with the last Snapshot version ? https://oss.sonatype.org/content/repositories/snapshots/io/gatling/highcharts/gatling-charts-highcharts/2.0.0-SNAPSHOT/

The JsonPath part has been rewritten from scratch using our own engine, https://github.com/gatling/jsonpath. We had too many issues like the own you describe. I have checked and your JsonPath expression is correctly resolved with this version.

cheers
Nicolas

7

Hi Nicolas,

That seems to work, many thanks.

Al

8

Nicolas, One more quick question about the new SNAPSHOT version I am using.

When I code:

setUp(scn.inject(nothingFor(4 seconds),
                 atOnce(10 users),
                ramp(10 users) over (5 seconds),

I get a:

…not found: value atOnce
16:47:30.720 [ERROR] i.g.a.ZincCompiler$ - atOnce(25 users),
16:47:30.721 [ERROR] i.g.a.ZincCompiler$ - ^

but I seem to be using a 2.x build

?

Alan

9

Syntax changed.
atOnce => atOnceUsers
ramp => rampUsers

10

doh… thanks :wink:

11

Hi, Since I changed to the SNAPSHOT version mentioned above, I have been unable to Log my responses for debugging purposes.

I get this error

15:50:09.965 [ERROR] i.g.a.ZincCompiler$ - /home/alan/devel/gatling/gatling-charts-highcharts-2.0.0-SNAPSHOT/user-files/simulations/pac/ValidateV2.scala:15: value getResponseBody is not a member of io.gatling.http.response.Response
15:50:09.988 [ERROR] i.g.a.ZincCompiler$ - println(“Response Type:” + response.getResponseBody())

for this code:

val httpP = http
.extraInfoExtractor((callId,status,session,request,response) => {

println(“Call:” + callId)
println("URL " + request.getUrl())
println(“Response Type:” + response.getResponseBody())
Nil
})

If I just dump the response object, I can see it is an instance of NettyResponse which seems to have this method?

//'scuse my Java lingo

Alan

12

We now have our own Response API which is different from the AHC one.
This way, we have a better control on how the chunks are used.

Now, response has a body which is of type ResponseBody:
https://github.com/excilys/gatling/blob/master/gatling-http/src/main/scala/io/gatling/http/response/Response.scala#L48

And ResponseBody has string, stream and bytes methods:
https://github.com/excilys/gatling/blob/master/gatling-http/src/main/scala/io/gatling/http/response/ResponseBody.scala#L87-L91

So, what you need is response.body.string.

13

Hi,

Thanks for the quick response as always. This worked once I grabbed the latest snapshot.

Al