verdaccio: Cannot authenticate to JFrog Artifactory as uplink - "Authorization" header not always sent

My reason:

Cannot authenticate to Artifactory uplink. I can connect directly to Artifactory by setting its information in npmrc. When I switch to verdaccio with Artifactory as uplink, authentication fails.

Steps to reproduce:

Configure Artifactory as an uplink. Try to install a module with NPM pointing to verdaccio.

App Version:

verdaccio/2.7.4

Config file:

Relevant portion:

uplinks:
  artifactory:
    url: https://artifactory.mydomain.com/artifactory/api/npm/npm-main/
    headers:
      # I tried several variations of "Accept" with no difference
      # Accept: application/json;
      # Accept: application/json; q=0.8, */*
      authorization: Basic MyBase64Credentials==

packages:
  '@*/*':
    access: $all
    publish: $authenticated
    proxy: artifactory
  '**':
    access: $all
    proxy: artifactory

Additional information:

• $ set DEBUG=express:* verdaccio enable extreme verdaccio debug mode
  • This did not do anything for me
• Verdaccio terminal output

warn --- http address - http://localhost:4873/ - verdaccio/2.7.4
 info <-- 127.0.0.1 requested 'GET /lodash'
 info --> making request: 'GET https://artifactory.mydomain.com/artifactory/api/npm/npm-main/lodash'
 http --> 401, req: 'GET https://artifactory.mydomain.com/artifactory/api/npm/npm-main/lodash' (streaming)
 http --> 401, req: 'GET https://artifactory.mydomain.com/artifactory/api/npm/npm-main/lodash', bytes: 0/91
 debug-=- updating package info
 http <-- 200, user: cjohnston(127.0.0.1), req: 'GET /lodash', bytes: 0/13669
 info <-- 127.0.0.1 requested 'GET /lodash/-/lodash-4.17.5.tgz'
 info --> making request: 'GET https://artifactory.mydomain.com:443/artifactory/api/npm/npm-main/lodash/-/lodash-4.17.5.tgz'
 http <-- 500, user: cjohnston(127.0.0.1), req: 'GET /lodash/-/lodash-4.17.5.tgz', error: bad uplink status code: 401
 info <-- 127.0.0.1 requested 'GET /lodash/-/lodash-4.17.5.tgz'
 info --> making request: 'GET https://artifactory.mydomain.com:443/artifactory/api/npm/npm-main/lodash/-/lodash-4.17.5.tgz'
 http <-- 500, user: cjohnston(127.0.0.1), req: 'GET /lodash/-/lodash-4.17.5.tgz', error: bad uplink status code: 401

• Windows, OS X/macOS, or Linux?:
  • MacOS
• Container:
  • I use local environment

Additional verbose log:

I don’t know how to get a more verbose log of the uplink connection.