Uploading file to rest API using JMeter

Question

Note - I have checked BlazeMeter Tutorial which uploads doc as Body Data while I use File Upload tab.

Here is how my request looks -

On execution I get following Request -

POST https://xxx

POST data:
<actual file content, not shown here>

[no cookies]

Request Headers:
Connection: keep-alive
Content-Type: multipart/form-data
Accept-Language: en-US
Authorization: bearer <>
Accept: application/json
Content-Length: 78920
Host: test-host
User-Agent: Apache-HttpClient/4.5.2 (Java/1.8.0_102)

And the request fails with 400 error -

Response code: 400
Response message: Bad Request

Since I am able to carry out file upload using curl, I assume that I missed the some configuration with JMeter. Curl looks as -

curl -X POST --header 'Content-Type: multipart/form-data' --header 'Accept: application/json' --header 'Authorization: Bearer <>' -F upload_file=@"test.pdf"  'https://xxx'

What did I miss in JMeter file upload?

I have also tried with MIME Type multipart/form-data but of no avail — Tarun

Dmitri T Dmitri T · Accepted Answer · 2016-09-19T15:44:19

If you can successfully upload file via curl, why don't you just record the upload through JMeter HTTP(S) Test Script Recorder like:

curl -x http://localhost:8888 -X POST --header 'Content-Type....."

If you still need to build the request manually consider two important bits:

You need to check Use multipart/form-data for POST.
The most significant, you need to supply "Parameter Name", According to HTTP Request Sampler Manual:

For the POST and PUT method, if there is no file to send, and the name(s) of the parameter(s) are omitted, then the body is created by concatenating all the value(s) of the parameters.

Looking into curl command manual in your case the "Parameter Name" should be upload_file

So the final configuration should look like:

See Performance Testing: Upload and Download Scenarios with Apache JMeter guide for above steps described in details.

Uploading file to rest API using JMeter

4 Answers