alagarr
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Alagarr is a request-response helper library that removes the boilerplate from your Node.js serverless functions and helps make your code portable.
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JavaScript
;
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
result["default"] = mod;
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const querystring = __importStar(require("querystring"));
function aws(request) {
const { headers: requestHeaders, requestContext, context } = request;
return {
awsAccountId: requestContext.accountId,
deploymentStage: requestContext.stage,
apig: {
requestId: requestContext.requestId,
resourcePath: requestContext.resourcePath,
},
cloudfront: {
country: requestHeaders['cloudfront-viewer-country'],
desktop: requestHeaders['cloudfront-is-desktop-viewer'] === 'true',
mobile: requestHeaders['cloudfront-is-mobile-viewer'] === 'true',
smarttv: requestHeaders['cloudfront-is-smarttv-viewer'] === 'true',
tablet: requestHeaders['cloudfront-is-tablet-viewer'] === 'true',
},
lambda: {
functionName: context.functionName,
memoryLimit: Number(context.memoryLimitInMB),
remainingExecutionTime: context.getRemainingTimeInMillis && context.getRemainingTimeInMillis(),
requestId: context.awsRequestId,
},
sourceIp: requestContext.identity.sourceIp,
};
}
function logger(request, response) {
const { source, headers: requestHeaders, meta, requestContext, provider, } = request;
const error = response.statusCode >= 500 && response.statusCode < 600;
const logEntry = Object.assign({ dateTime: new Date().toISOString(), eventSource: source, hostname: request.hostname, httpMethod: requestContext.httpMethod, httpProtocol: requestHeaders.via && requestHeaders.via.split(' ')[0], httpReferrer: requestHeaders.referer, httpUserAgent: requestHeaders['user-agent'], requestContentLength: (request.body && request.body.length) || 0, requestTime: Date.now() - request.timestamp, requestUri: request.path +
(request.query && Object.keys(request.query).length
? `?${querystring.stringify(request.query)}`
: ''), responseContentLength: response.headers['content-length'], statusCode: response.statusCode, xForwardedHost: requestHeaders['x-forwarded-host'] }, meta, (provider === 'aws' && aws(request)));
return ((error ? process.stderr : process.stdout).write(JSON.stringify(logEntry)) &&
logEntry);
}
exports.logger = logger;
function logResponse(response, request, options) {
return ((options.enableLogger &&
((typeof options.logger === 'function'
? options.logger(request, response)
: logger(request, response)) &&
response)) ||
response);
}
exports.default = logResponse;