Elastic Load Balancer reverses order of `multiValueHeaders`
laverdet opened this issue · 0 comments
laverdet commented
I noticed this issue and I'm not sure how long it's been around. I opened a similar issue at vendia/serverless-express#554 since we use both of these packages. AWS Elastic Load Balancer is reversing the order of header values specified in multiValueHeaders
. Is this something that you've seen before?
exports.handler = async (event) => ({
statusCode: 200,
body: JSON.stringify(event),
isBase64Encoded: false,
cookies: [
'a=1',
'a=2',
],
multiValueHeaders: {
'x-set-cookie': [
'a=1',
'a=2'
],
},
'content-type': [ 'text/plain' ],
});
-> % curl -vv http://lambd-LoadB-1DYPW4EWVLYCT-1230052677.us-east-1.elb.amazonaws.com 2>&1 | grep -i set-cookie
< x-set-cookie: a=2
< x-set-cookie: a=1
We can workaround it obviously but I'm wondering if this is a new issue or if ELB has always been broken, or if it's only broken in certain circumstances.