Binary Payload Support - Pact mock service returning 500 error: Encoding::UndefinedConversionError - "\xFF" from ASCII-8BIT to UTF-8

[meadsteve]

Making a put request with image data as a payload results in the mock service returning a 500. The following errors are logged in

E, [2018-12-04T09:01:40.958484 #9] ERROR -- : Error ocurred in mock service: Encoding::UndefinedConversionError - "\xFF" from ASCII-8BIT to UTF-8
E, [2018-12-04T09:01:40.959014 #9] ERROR -- : /usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/request_handlers/interaction_replay.rb:16:in `encode'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/request_handlers/interaction_replay.rb:16:in `to_json'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/request_handlers/interaction_replay.rb:16:in `pretty_generate'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/request_handlers/interaction_replay.rb:49:in `find_response'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/request_handlers/interaction_replay.rb:41:in `respond'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/request_handlers/base_request_handler.rb:17:in `call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.0.5/lib/rack/cascade.rb:33:in `block in call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.0.5/lib/rack/cascade.rb:24:in `each'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.0.5/lib/rack/cascade.rb:24:in `call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/consumer/mock_service/cors_origin_header_middleware.rb:11:in `call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/consumer/mock_service/error_handler.rb:13:in `call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/mock_service/app.rb:33:in `call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-2.10.1/lib/pact/consumer/mock_service/set_location.rb:14:in `call'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.0.5/lib/rack/handler/webrick.rb:86:in `service'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:138:in `service'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:94:in `run'
/usr/local/lib/python2.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/server.rb:191:in `block in start_thread'

A repo for replication can be found here:

https://github.com/meadsteve/pact-django-image-error

Any thoughts on what's happening? Is there something I've missed?

[DKorytkin]

I have pretty the same error, I assume pact-mock_service doesn't support binary payloads of requests 🤔
because in my case, I send a compressed JSON in the body.

HEADERS: "Content-Encoding": "gzip"

I attached a reproducible example:

Implementation of simple client:

import gzip
import json

import requests


def compress(data: dict):
    return gzip.compress(data=json.dumps(data).encode("utf-8"))


class Client:
    def __init__(self, base_url="http://localhost:5000"):
        self.url = base_url

    def send(self, content):
        compressed_content = compress(content)
        response = requests.post(
            self.url, data=compressed_content, headers={"Content-Encoding": "gzip"}
        )
        return response.status_code

Test for this client:

import socket
from contextlib import closing

import pytest
from pact import Consumer, Pact, Provider

from client import Client


def find_free_port(host):
    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
        s.bind((host, 0))
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        return s.getsockname()[1]


@pytest.fixture(scope="session")
def host():
    return "localhost"


@pytest.fixture(scope="session")
def port(host):
    return find_free_port(host)


@pytest.fixture(scope="session")
def pact(host, port) -> Pact:
    pact = (
        Consumer("Client", tag_with_git_branch=True, tags=["broken", "mock-server"])
        .has_pact_with(
            Provider("Server"), host_name=host, port=port, pact_dir="tests/data/contracts"
        )
    )
    pact.start_service()
    yield pact
    pact.stop_service()


@pytest.fixture(scope="session")
def client(host, port) -> Client:
    return Client(f"http://{host}:{port}")


def test_client_sending_messages(pact, client):
    exp_content = {"data": [1, 2, 3]}
    pact_definition = (
        pact.given("Sending requests")
        .upon_receiving("binary (compressed data / files / etc...)")
        .with_request("POST", "/", body=exp_content)
        .will_respond_with(status=201)
    )

    with pact_definition:
        result = client.send(exp_content)
    assert result == 201

Result

test_client.py:55: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/pact.py:380: in __exit__
    self.verify()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <pact.pact.Pact object at 0x10e86ea50>

    def verify(self):
        """
        Have the mock service verify all interactions occurred.
    
        Calls the mock service to verify that all interactions occurred as
        expected, and has it write out the contracts to disk.
    
        :raises AssertionError: When not all interactions are found.
        """
        self._interactions = []
        resp = requests.get(
            self.uri + "/interactions/verification", headers=self.HEADERS, verify=False
        )
>       assert resp.status_code == 200, resp.text
E       AssertionError: {"message":"Error ocurred in mock service: Encoding::UndefinedConversionError - \"\\x8B\" from ASCII-8BIT to UTF-8","backtrace":["/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `encode'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `generate'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `pretty_generate'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:64:in `generate_string'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:37:in `to_s'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:31:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:27:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:59:in `to_s'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:25:in `collect'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:25:in `to_s'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/verification_get.rb:55:in `collect'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/verification_get.rb:55:in `to_s'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/verification_get.rb:30:in `respond'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/base_request_handler.rb:17:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:35:in `block in call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:26:in `each'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:26:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/cors_origin_header_middleware.rb:11:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/error_handler.rb:13:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/app.rb:34:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/set_location.rb:14:in `call'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/handler/webrick.rb:88:in `service'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:138:in `service'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:94:in `run'","/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/server.rb:191:in `block in start_thread'"]}

../../.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/pact.py:279: AssertionError
-------------------------------------------------------------------------- Captured stdout setup ---------------------------------------------------------------------------
INFO  WEBrick 1.3.1
INFO  ruby 2.2.2 (2015-04-13) [x86_64-darwin13]
INFO  WEBrick::HTTPServer#start: pid=91102 port=62183
--------------------------------------------------------------------------- Captured stderr call ---------------------------------------------------------------------------
WARN: No content type found, performing text diff on body
WARN: No content type found, performing text diff on body
------------------------------------------------------------------------- Captured stdout teardown -------------------------------------------------------------------------
INFO: Writing pact before shutting down
INFO  going to shutdown ...
INFO  WEBrick::HTTPServer#start done.
========================================================================= short test summary info ==========================================================================
FAILED test_client.py::test_client_sending_messages - AssertionError: {"message":"Error ocurred in mock service: Encoding::UndefinedConversionError - \"\\x8B\" from ASCI...
============================================================================ 1 failed in 7.32s =============================================================================

but if i remove compression, it works fine

diff --git a/client.py b/client.py
index aca214f..4b6f0c5 100644
--- a/client.py
+++ b/client.py
@@ -13,8 +13,5 @@ class Client:
         self.url = base_url
 
     def send(self, content):
-        compressed_content = compress(content)
-        response = requests.post(
-            self.url, data=compressed_content, headers={"Content-Encoding": "gzip"}
-        )
+        response = requests.post(self.url, json=content)
         return response.status_code

[DKorytkin]

Also attached full log:

I, [2022-09-21T15:09:23.473267 #97187]  INFO -- : Cleared interactions
I, [2022-09-21T15:09:23.479048 #97187]  INFO -- : Registered expected interaction POST /
D, [2022-09-21T15:09:23.479159 #97187] DEBUG -- : {
  "description": "binary (compressed data / files / etc...)",
  "providerState": "Sending requests",
  "request": {
    "method": "POST",
    "path": "/",
    "body": {
      "data": [
        1,
        2,
        3
      ]
    }
  },
  "response": {
    "status": 201,
    "headers": {
    }
  },
  "metadata": null
}
I, [2022-09-21T15:09:23.485407 #97187]  INFO -- : Received request POST /
D, [2022-09-21T15:09:23.489456 #97187] DEBUG -- : {:path=>"/", :query=>"", :method=>"post", :body=>"\x1F\x8B\b\x00\xF3\xFE*c\x02\xFF\xABVJI,IT\xB2R\x886\xD4Q0\xD2Q0\x8E\xAD\x05\x00\xEAk\xD2\x02\x13\x00\x00\x00", :headers=>{"Content-Length"=>"39", "Host"=>"localhost:63061", "User-Agent"=>"python-requests/2.28.1", "Accept-Encoding"=>"gzip, deflate", "Accept"=>"*/*", "Connection"=>"keep-alive", "Content-Encoding"=>"gzip", "Version"=>"HTTP/1.1"}}
E, [2022-09-21T15:09:23.490421 #97187] ERROR -- : No matching interaction found for POST /
E, [2022-09-21T15:09:23.490451 #97187] ERROR -- : Interaction diffs for that route:
E, [2022-09-21T15:09:23.490747 #97187] ERROR -- : Error ocurred in mock service: Encoding::UndefinedConversionError - "\x8B" from ASCII-8BIT to UTF-8
E, [2022-09-21T15:09:23.490805 #97187] ERROR -- : /Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `encode'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `generate'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `pretty_generate'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:64:in `generate_string'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:37:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:31:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:27:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:59:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:25:in `collect'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:25:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/interaction_replay.rb:162:in `log'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/interaction_replay.rb:143:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/interaction_replay.rb:74:in `handle_unrecognised_request'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/interaction_replay.rb:58:in `find_response'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/interaction_replay.rb:45:in `respond'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/base_request_handler.rb:17:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:35:in `block in call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:26:in `each'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:26:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/cors_origin_header_middleware.rb:11:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/error_handler.rb:13:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/app.rb:34:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/set_location.rb:14:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/handler/webrick.rb:88:in `service'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:138:in `service'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:94:in `run'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/server.rb:191:in `block in start_thread'
E, [2022-09-21T15:09:23.496018 #97187] ERROR -- : Error ocurred in mock service: Encoding::UndefinedConversionError - "\x8B" from ASCII-8BIT to UTF-8
E, [2022-09-21T15:09:23.496094 #97187] ERROR -- : /Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `encode'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `generate'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/json-2.5.1/lib/json/common.rb:406:in `pretty_generate'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:64:in `generate_string'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:37:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:31:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-support-1.17.0/lib/pact/matchers/unix_diff_formatter.rb:27:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:59:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:25:in `collect'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/interactions/interaction_mismatch.rb:25:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/verification_get.rb:55:in `collect'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/verification_get.rb:55:in `to_s'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/verification_get.rb:30:in `respond'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/request_handlers/base_request_handler.rb:17:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:35:in `block in call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:26:in `each'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/cascade.rb:26:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/cors_origin_header_middleware.rb:11:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/error_handler.rb:13:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/mock_service/app.rb:34:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/pact-mock_service-3.9.0/lib/pact/consumer/mock_service/set_location.rb:14:in `call'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/rack-2.1.4/lib/rack/handler/webrick.rb:88:in `service'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:138:in `service'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/httpserver.rb:94:in `run'
/Users/denis.korytkin/.virtualenvs/pact-bug/lib/python3.7/site-packages/pact/bin/pact/lib/vendor/ruby/2.2.0/gems/webrick-1.3.1/lib/webrick/server.rb:191:in `block in start_thread'

[mefellows]

Yes, the Ruby core doesn't support binary payloads. When we update to the rust core (tentatively Q4 this year) we should be able to support that.

See https://docs.pact.io/faq#how-do-i-test-binary-files-in-responses-such-as-a-download for what to do in the mean time.

[YOU54F]

I've marked this, and will mark others with needs-pact-rust-core label, to note it won't be fixed until we move to the rust core, or will be fixed by moving to the rust core.

For those wishing to contribute to getting pact-python into v3 and beyond via the rust core, please shout out here

#88

[YOU54F]

Binary payload support will be delivered in #367

Will update the title of the issue to reflect this