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Support Empty Identity Source for Request Lambda Authorisers #1720

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Support Empty Identity Source for Request Lambda Authorisers #1720

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74e7651
add empty identity sources for request authorisers
aidant Aug 11, 2023
b83a333
Merge remote-tracking branch 'upstream/master'
aidant Nov 21, 2023
56f233f
fix formatting from editor
aidant Nov 21, 2023
a032cae
fix bad bracket from merge conflict
aidant Nov 21, 2023
27c62d4
change identity source to none from null
aidant Nov 21, 2023
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31 changes: 17 additions & 14 deletions src/events/http/createAuthScheme.js
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Expand Up @@ -77,19 +77,17 @@ export default function createAuthScheme(authorizerOptions, provider, lambda) {
authorization = queryStringParameters[identitySourceField]
break
}
case IDENTITY_SOURCE_TYPE_NONE: {
break
}
default: {
throw new Error(
`No Authorization source has been specified. This should never happen. (λ: ${authFunName})`,
)
break
}
}

let finalAuthorization
if (identitySourceType !== IDENTITY_SOURCE_TYPE_NONE) {
if (authorization === undefined) {
if (
authorization === undefined &&
authorizerOptions.type !== 'request'
) {
log.error(
`Identity Source is null for ${identitySourceType} ${identitySourceField} (λ: ${authFunName})`,
)
Expand Down Expand Up @@ -272,10 +270,13 @@ export default function createAuthScheme(authorizerOptions, provider, lambda) {
return identitySourceMatch[expectedLength - 1]
}

if (
authorizerOptions.type !== 'request' ||
authorizerOptions.identitySource
) {
if (authorizerOptions.identitySource === '') {
identitySourceField = null
identitySourceType = IDENTITY_SOURCE_TYPE_NONE
return finalizeAuthScheme()
}

if (authorizerOptions.identitySource) {
// Only validate the first of N possible headers.
const headerRegExp = /^(method.|\$)request.header.((?:\w+-?)+\w+).*$/
const queryStringRegExp =
Expand All @@ -298,9 +299,11 @@ export default function createAuthScheme(authorizerOptions, provider, lambda) {
return finalizeAuthScheme()
}

throw new Error(
`Serverless Offline only supports retrieving tokens from headers and querystring parameters (λ: ${authFunName})`,
)
if (authorizerOptions.type !== 'request') {
throw new Error(
`Serverless Offline only supports retrieving tokens from headers and querystring parameters (λ: ${authFunName})`,
)
}
}

if (authorizerOptions.resultTtlInSeconds === 0) {
Expand Down