The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256 when using region Frankfurt

[jurajpetrik]

When I create a bucket on AWS with the region:Frankfurt there will be an error on connecting.

Furthermore, the error message isn't very helpful.

 events.js:74
         throw TypeError('Uncaught, unspecified "error" event.');
               ^
 TypeError: Uncaught, unspecified "error" event.
     at TypeError (<anonymous>)
     at Writable.EventEmitter.emit (events.js:74:15)
     at /home/juraj/code/sportlookbackend/node_modules/skipper-s3/index.js:238:22
     at PassThrough.MultiPartUpload._handleStream      (/home/juraj/code/sportlookbackend/node_modules/skipper-s3/node_modules/knox-mpu-     alt/lib/multipartupload.js:328:16)
     at PassThrough.EventEmitter.emit (events.js:117:20)
     at module.exports           (/home/juraj/code/sportlookbackend/node_modules/sails/node_modules/skipper/standalone/Upstream/     prototype.fatalIncomingError.js:65:17)
     at Function.forEach           (/home/juraj/code/sportlookbackend/node_modules/sails/node_modules/lodash/dist/lodash.js:3297:15)
     at lodash.ctor.(anonymous function) [as each]      (/home/juraj/code/sportlookbackend/node_modules/sails/node_modules/lodash/dist/lodash.js:5924:31)
     at Upstream.fatalIncomingError      (/home/juraj/code/sportlookbackend/node_modules/sails/node_modules/skipper/standalone/Upstream/     prototype.fatalIncomingError.js:55:18)
     at Writable.unableToUpload      (/home/juraj/code/sportlookbackend/node_modules/sails/node_modules/skipper/standalone/Upstream/     prototype.upload.js:142:10)
     at Writable.g (events.js:180:16)
     at Writable.EventEmitter.emit (events.js:117:20)
     at /home/juraj/code/sportlookbackend/node_modules/skipper-s3/index.js:238:22
     at MultiPartUpload._putStream (/home/juraj/code/sportlookbackend/node_modules/skipper-     s3/node_modules/knox-mpu-alt/lib/multipartupload.js:217:42)
     at MultiPartUpload._initiate (/home/juraj/code/sportlookbackend/node_modules/skipper-     s3/node_modules/knox-mpu-alt/lib/multipartupload.js:131:18)
     at Parser.exports.Parser.Parser.parseString      (/home/juraj/code/sportlookbackend/node_modules/skipper-s3/node_modules/knox-mpu-     alt/node_modules/xml2js/lib/xml2js.js:255:20)

Luckily it's just a case of skipper not passing the error message through. When I put a breakpoint in

node_modules/sails/node_modules/skipper/standalone/Upstream/prototype.fatalIncomingError.js:55

I can see the error. It is the following:

    "Unable to initiate stream upload [Error: Unexpected response from AWS:{ Code: 'InvalidRequest',
     Message: 'The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.',

And it can be tracked down to a known issue in knox that skipper-s3 uses for AWS communication.
Automattic/knox#254

And they already seem to be working on a fix for that Automattic/knox#273

[jurajpetrik]

Fix for this is simply: don't use region:Frankfurt. If you're from Europe region Ireland works just fine

[sgress454]

@jurajpetrik thanks for the update. If you can see where it would be easy to have Skipper pass the error message through, we'd love a PR!