Using npm behind firewall using Visual Studio 2015

Question

I try to utilize the new npm support in Visual Studio 2015, but are hitting some problems. I'm located behind a corporate firewall.

I have tried to add "grunt" from the package.json file, and can see this output related to npm.

npm http GET https://registry.npmjs.org/grunt
npm http GET https://registry.npmjs.org/grunt-bower-task
npm http GET https://registry.npmjs.org/grunt-contrib-cssmin
npm http GET https://registry.npmjs.org/grunt-bower-task
npm http GET https://registry.npmjs.org/grunt-contrib-cssmin
npm http GET https://registry.npmjs.org/grunt
npm http GET https://registry.npmjs.org/grunt
npm http GET https://registry.npmjs.org/grunt-bower-task
npm http GET https://registry.npmjs.org/grunt-contrib-cssmin
npm ERR! Error: UNABLE_TO_VERIFY_LEAF_SIGNATURE
npm ERR!     at SecurePair.<anonymous> (tls.js:1367:32)
npm ERR!     at SecurePair.emit (events.js:92:17)
npm ERR!     at SecurePair.maybeInitFinished (tls.js:979:10)
npm ERR!     at CleartextStream.read [as _read] (tls.js:471:13)
npm ERR!     at CleartextStream.Readable.read (_stream_readable.js:340:10)
npm ERR!     at EncryptedStream.write [as _write] (tls.js:368:25)
npm ERR!     at doWrite (_stream_writable.js:225:10)
npm ERR!     at writeOrBuffer (_stream_writable.js:215:5)
npm ERR!     at EncryptedStream.Writable.write (_stream_writable.js:182:11)
npm ERR!     at write (_stream_readable.js:601:24)
npm ERR! If you need help, you may report this *entire* log,
npm ERR! including the npm and node versions, at:
npm ERR!     <http://github.com/npm/npm/issues>
npm ERR! System Windows_NT 6.1.7601
npm ERR! command "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\Common7\\IDE\\Extensions\\Microsoft\\Web Tools\\External\\\\node\\node" "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\Common7\\IDE\\Extensions\\Microsoft\\Web Tools\\External\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install"
npm ERR! cwd C:\Data\Develop\Playground\WebBasics2
npm ERR! node -v v0.10.31
npm ERR! npm -v 1.4.9
npm

I have seen some posts where you can configure node to ignore SSL, but don't know how to do this in Visual Studio 2015.

Please help Best regards, Thomas

Answer 1

Following steps will work for VS 2015

1- Run command prompt as Administrator

2- go to Path of External tools for VS 2015 in your case it is " C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Web Tools\Editors

3- npm config set ca=""

4- npm config set strict-ssl false

5- npm install npm -g --ca=null

For Visual Studio 2017 Professional Please check the comments by Jignesh Hirpara

Answer 2

In my case the above solution did not work. It worked after updating .npmrc file and when running npm with a help of Fiddler. Here are the steps that worked for me:

• After installed npm, update .npmrc file located in C:\Users\'username' directory:

registry=http://registry.npmjs.org

proxy=http://127.0.0.1:8888

https-proxy=http://127.0.0.1:8888

http-proxy=http://127.0.0.1:8888

strict-ssl=false

• Open Fiddler, and under 'Rules' tab select 'Authomatically Authenticate'. Lets not forget Fiddler listens on port 8888
• While having Fiddler open, the npm command shouwl work just fine within Visual Studio

This should work behind corporate firewall, with domain joined systems.