ERR_INVALID_CHAR

[Marcin Grabda]

Am I the only one getting the error below for every aws-sdk request?

2020-10-20T03:54:35.812Z 8debf246-54d9-1f6d-9a2f-d85fce49307f ERROR Uncaught Exception {"errorType":"TypeError [ERR_INVALID_CHAR]","errorMessage":"Invalid character in header content ["x-aws-ec2-metadata-token"]","code":"ERR_INVALID_CHAR","stack":["TypeError [ERR_INVALID_CHAR]: Invalid character in header content ["x-aws-ec2-metadata-token"]"," at ClientRequest.setHeader (_http_outgoing.js:473:3)"," at new ClientRequest (_http_client.js:203:14)"," at Object.request (http.js:42:10)"," at features.constructor.handleRequest (/var/task/node_modules/aws-sdk/lib/http/node.js:45:23)"," at sendRequest (/var/task/node_modules/aws-sdk/lib/util.js:887:12)"," at process._tickCallback (internal/process/next_tick.js:61:11)"]}

[Michael Hart]

@marcingrabda is this related to this repo? Can you show how you're calling docker-lambda?

[Marcin Grabda]

I trimmed my lambda down to:

const AWS = require('aws-sdk');

AWS.config.update({
    region: 'us-east-1'
});

const s3 = new AWS.S3();

exports.handler = async function () {
    let s3Bucket = process.env.S3_BUCKET;
    let params = {
        Bucket: s3Bucket,
        Delimiter: '/'
    };
    let data = await s3.listObjectsV2(params).promise();
    console.log(data);
}

I'm invoking it:
docker run -v $PROJECT_DIR:/var/task --rm -e S3_BUCKET=s3-bucket lambci/lambda:nodejs12.x index.handler {}

The error I'm getting is above.

[Michael Hart]

It doesn't look like you're passing credentials in?

[Michael Hart]

This works for me:

1. Obtain temporary credentials (ie, populate AWS_* env vars)
2. Create a new directory
3. Add a file called index.js with the contents from your comment above
4. cd into that directory and run:

docker run -v $PWD:/var/task --rm -e S3_BUCKET=mybucket \
  -e AWS_SECRET_ACCESS_KEY -e AWS_ACCESS_KEY_ID -e AWS_SESSION_TOKEN \
  lambci/lambda:nodejs12.x index.handler '{}'

[Michael Hart]

Have you installed your own version of aws-sdk? Do you have a node_modules directory in your PROJECT_DIR directory? It might be that you've got an out-of-date or buggy aws-sdk version?

[Marcin Grabda]

Removing proxy configuration for Docker solved the problem. Thanks for your help.