The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details. about aws4 HOT 13 CLOSED

Not sure – not all that familiar with axios. Have you been able to do it successfully using the builtin Node.js https library as described in the README?

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Btw, url is not a standard property that the Node.js http module accepts. See here for accepted values:

https://nodejs.org/api/http.html#http_http_request_options_callback

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Thanks for your very quick response. I've just tried the following and I'm getting the same error.

let request = {
  host: 'xxxxxx.execute-api.eu-west-2.amazonaws.com/dev',
  method: 'GET',
  path: '/xxxxxx',
  service: 'execute-api',
  region: 'eu-west-2'
}
let signedRequest = aws4.sign(request, {
  accessKeyId: rootState.auth.accessKeyId,
  secretAccessKey: rootState.auth.secretAccessKey,
  sessionToken: rootState.auth.sessionToken
})
console.log(signedRequest)
https.request(signedRequest, function (res) { res.pipe(process.stdout) }).end()

Console error:
"Failed to load https://xxxxxxx.execute-api.eu-west-2.amazonaws.com/dev/xxxxxx: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access. The response had HTTP status code 403. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled."

x-amzn-errortype: InvalidSignatureException

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By the way, I'm using the following in my webpack config as you recommended elsewhere. Don't know if that has any significance here?

resolve: {
      alias: {
        querystring: 'querystring-browser'
      }
    }

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That host doesn't look correct?

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Also, I'm guessing you're trying to do this from the browser? Sorry, that wasn't clear in your initial issue. Try just getting it working from Node itself first – then you can tell if it's just the way you're using the browser, or something more deep seeded.

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Yes, I'm trying from the browser. I'm building an SPA with Vue - there is no Node server.

Can you tell me what looks wrong with host? Axios doesn't require a host to be specified. Is this a requirement of aws4 or of Node.js https module?

Thanks for your help with this. I really appreciate it. I'm stuck for any alternative solution for AWS v4 signature.

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Your host has a path in it – /dev at the end there.

Please read up on the options here:

https://nodejs.org/api/http.html#http_http_request_options_callback

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Success! As you suggested, fixing the host got this working with the https library. I will now try to get it working with axios and will post again here when I do.

Again, many thanks for your help.

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No probs, glad you're getting somewhere! 👍

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@jeremyburton Did you have any luck getting it working with Axios?

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@alexjfno1 Yes, see this article for very useful guidance.

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For someone who sees this, axios also works fine with aws4 just like https. If you see the error in the title, please double check your host url path region service attributes in your request options.

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