Proxy HTTP requests to AWS Lambda
npm install http-lambda-proxyjs
npm i http-lambda-proxy
`Usage
The following example describe how to use with restana:
`js
const lambdaProxy = require('http-lambda-proxy')
const proxy = lambdaProxy({
target: process.env.FUNCTION_NAME,
region: process.env.AWS_REGION
})const service = require('restana')()
service.all('/*', (req, res) => {
proxy(req, res, req.url, {}))
})
service.start(8080)
`
> In this example, we proxy all http requests on port 8080 to an AWS Lambda function.$3
js
const serverless = require('serverless-http')
const json = require('serverless-json-parser')
const query = require('connect-query')const service = require('restana')()
service.use(query())
service.use(json())
// routes
service.get('/get', (req, res) => {
res.send({ msg: 'Go Serverless!' })
})
service.post('/post', (req, res) => {
res.send(req.body)
})
// export handler
module.exports.handler = serverless(service)
`API
$3
####
Set the AWS Region of the target downstream lambda.
####
AWS Lambda funcion name, version, or alias.
#### logType
Set to "Tail" to include the execution log in the response. Default: "None"
#### qualifier
Specify a version or alias to invoke a published version of the function.
#### clientContext
Up to 3583 bytes of base64-encoded data about the invoking client to pass to the function in the context object.
#### lambdaProxy
Function wrapper to AWS Lambda invocation proxy. Allows to overwrite default implementation.
> Any other AWS.Lambda constructor option is allowed: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Lambda.html---
More details on
: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Lambda.html#invoke-propertyProxying
`js
proxy(
originReq, // http.IncomingMessage
originRes, // http.ServerResponse
req.url, // Request URL
{} // Options described below
)
`
$3
#### onResponse(req, res, response)
Called when the remote lambda response is received. If defined, default behavior is overwritten. #### rewriteHeaders(headers)
Called to rewrite the headers of the response, before them being copied over to the outer response. It must return the new headers object.
Supported response formats
The following alternatives describe the supported response formats:
- Ideally, your lambda function is implemented using the serverless-http module, so you can run fully featured Node.js REST/HTTP services as AWS Lambda funtions.
- Your lambda respond using a JSON Payload with the following format:
js
{
"headers": {
// ...
},
"statusCode": 200,
"body": // ...
}
`
- Your lambda respond with a JSON Payload and it contains a property:
`js
exports.handler = async function () {
return JSON.stringify({
body: "Hello World!"
})
}
`
> The lambda function implementation is NOT restricted to Node.js, you can use any of the supported AWS Lambda runtimes.Related topics
- fast-gateway: https://www.npmjs.com/package/fast-gateway
- fast-proxy: https://www.npmjs.com/package/fast-proxyLicense
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