lambda-proxy-integration

AWS API Gateway Lambda Proxy Integration middleware

API Gateway

set resource path like your folder structure and vice-versa

GET /user/friendlist
will map to:
/path-to-your-lambda-function-root/user/friendlist/GET.js

Lambda Integration

Inside your file you have to export a Promise:

``javascript
// File: /resources/user/friendlist/GET.js

module.exports = function (requestPayload) {

return new Promise(function (resolve, reject) {

if (/some errors/) {

// the params of "reject" will be passed to the error function
return reject({
code: 500,
message: 'Server error'
});
}

// the params of "resolve" will be passed to the response function
resolve({
success: true
});

});
};

`

In the root of lambda function, you export the integration created like this:

`javascript
// File: /index.js

var createIntegration = require('lambda-proxy-integration');

const lambdaProxyIntegration = createIntegration(function ({ requestPayload }) {

return {

headers: {
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "GET,OPTIONS,POST",
"Access-Control-Allow-Headers": "Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token"
},

// "response" params comes from resolve params
response: function (response) {
var body = {};

return {
body: response
};
},

// "error" params comes from reject params
error: function (error) {
return {
statusCode: error.code || 500,
body: {
error: error
}
}
}

};

});


exports.handler = lambdaProxyIntegration;
``