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set Content-Length header in mapApiGatewayEventToHttpRequest #147

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set Content-Length header in mapApiGatewayEventToHttpRequest #147

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5d8c486
set Content-Length header
HotelCalifornia May 30, 2018
1ef34b8
only specify content-length in certain cases
HotelCalifornia Jun 19, 2018
9745be8
update tests
HotelCalifornia Jun 21, 2018
462bfdf
forcibly inject Content-Length into event.headers
HotelCalifornia Jun 21, 2018
c86713d
remove extraneous whitespace
HotelCalifornia Jun 21, 2018
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4 changes: 4 additions & 0 deletions __tests__/index.js
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Expand Up @@ -51,6 +51,8 @@ function mapApiGatewayEventToHttpRequest(headers) {
headers
}
const eventClone = JSON.parse(JSON.stringify(event))
// NOTE: mapApiGatewayEventToHttpRequest will specify Content-Length if not specified
eventClone.headers = Object.assign(eventClone.headers || {}, {'Content-Length': Buffer.byteLength(eventClone.body)})
delete eventClone.body
const context = {
'foo': 'bar'
Expand All @@ -68,6 +70,7 @@ test('mapApiGatewayEventToHttpRequest: with headers', () => {
method: 'GET',
path: '/foo',
headers: {
'Content-Length': Buffer.byteLength('Hello serverless!'),
'x-foo': 'foo',
'x-apigateway-event': encodeURIComponent(JSON.stringify(r.eventClone)),
'x-apigateway-context': encodeURIComponent(JSON.stringify(r.context))
Expand All @@ -83,6 +86,7 @@ test('mapApiGatewayEventToHttpRequest: without headers', () => {
method: 'GET',
path: '/foo',
headers: {
'Content-Length': Buffer.byteLength('Hello serverless!'),
'x-apigateway-event': encodeURIComponent(JSON.stringify(r.eventClone)),
'x-apigateway-context': encodeURIComponent(JSON.stringify(r.context))
},
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7 changes: 7 additions & 0 deletions index.js
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Expand Up @@ -33,6 +33,13 @@ function isContentTypeBinaryMimeType(params) {

function mapApiGatewayEventToHttpRequest(event, context, socketPath) {
const headers = event.headers || {} // NOTE: Mutating event.headers; prefer deep clone of event.headers
// NOTE: API Gateway is not setting Content-Length header on any requests even when they have a body
if (event.body && !headers['Content-Length']) {
// set header on event directly so x-apigateway-event is set correctly later
if (!event.headers) event.headers = {}
event.headers['Content-Length'] = Buffer.byteLength(event.body)
headers['Content-Length'] = Buffer.byteLength(event.body)
}
const eventWithoutBody = Object.assign({}, event)
delete eventWithoutBody.body

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