How to send binary file as body?

[rewagner87]

Hello,

Has anyone been able to send the contents of a binary file as the request body with wrk?

I have been able to send the contents of a json file by doing this:

wrk.method = "POST"
local f = io.open("data.json", "r")
wrk.body   = f:read("*all")

But when I try to do something similar with a binary file like so:

wrk.method = "POST"
local f = assert(io.open("request.pb", "rb"))
wrk.body   = f:read("*all")

It doesn't seem to work. I'm able to use this same pb file with a curl command, but can't get it working quite right with wrk.

Any help would be greatly appreciated.

Thanks!

[letmaik]

This works as expected, just remove the assert:

wrk.method = "POST"
local f = io.open("request.pb", "rb")
wrk.body   = f:read("*all")

[tonytonyjan]

This works as expected, just remove the assert:

wrk.method = "POST"
local f = io.open("request.pb", "rb")
wrk.body   = f:read("*all")

Wouldn't this read the disk per request and affect performance?

[cowboy-bebug]

@tonytonyjan yeah it does look like it's adding some overhead (although I didn't measure the disk I/O):

$ wrk --threads=1 --connections=1 --duration=10s --script="using_io.lua" http://localhost:1234/test
Running 10s test @ http://localhost:3005/nzcp/v1/verify
  1 threads and 1 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   344.33ms   83.55ms 622.22ms   86.21%
    Req/Sec     2.66      0.72     4.00     86.21%
  29 requests in 10.02s, 16.06KB read
Requests/sec:      2.89
Transfer/sec:      1.60KB

$ wrk --threads=1 --connections=1 --duration=10s --script="using_static.lua" http://localhost:1234/test
Running 10s test @ http://localhost:3005/nzcp/v1/verify
  1 threads and 1 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   207.19ms   82.15ms 515.03ms   84.62%
    Req/Sec     5.18      2.70    10.00     67.35%
  49 requests in 10.05s, 26.22KB read
Requests/sec:      4.88
Transfer/sec:      2.61KB

Using hexdump into a file, regex and then passing raw bytes statically helped for me:

local pdf = "\x65\x72\x20\x5b..." -- eg, pdf
wrk.method = "POST"
wrk.body   = pdf
wrk.headers["Content-Type"] = "application/pdf"

[khurshid-alam]

This doesn't works for with xml. Getting all 404 in response.

wrk.method = "POST"
local f = io.open("post_con_m2.xml", "r")
wrk.body   = f:read("*all")
wrk.headers["Content-Type"] = "application/xml"
wrk.headers["Accept"] = "application/xml"

wrk -t12 -c400 -d30s -s post.lua https://demo.example.com/HubWrapper/ConciseSearch:443

Any idea why ?