handleRequest
Convert a serverless event into a standard Request, route it through the Hono
app, and return a normalized ServerlessResponse.
Parameters
app
A Hono-compatible application with a fetch method.
event
The incoming serverless event. Properties include httpMethod, method,
headers, body, isBase64Encoded, path, rawPath, queryStringParameters,
multiValueQueryStringParameters and pathParameters (API Gateway REST),
rawQueryString (API Gateway v2 and function URLs), and requestContext.
With a signing key set, the signature is checked over the URL SignalWire signed: the URL the platform was called on, with its query, and the raw body.
Returns
Promise<ServerlessResponse> — A normalized response with statusCode,
headers, and body.