hono-alibaba-cloud-fc3-adapter/dist/handler.js

An adapter for using Hono with Alibaba Cloud Function Compute 3.0

import { decodeBase64, encodeBase64 } from "hono/utils/encode";
const parseEvent = (event) => {
    return JSON.parse(event.toString("utf-8"));
};
/**
 * Accepts events from Alibaba Cloud FC3 and return Alibaba Cloud FC3 responses
 */
export const handle = (app) => {
    return async (eventRaw, context) => {
        const event = parseEvent(eventRaw);
        const req = createRequest(event);
        const res = await app.fetch(req, {
            event,
            context,
        });
        return createResponse(res);
    };
};
export const createRequest = (event) => {
    const url = new URL(`https://${event.requestContext.domainName}${event.rawPath}`);
    const params = new URLSearchParams(event.queryParameters);
    url.search = params.toString();
    const headers = new Headers(event.headers);
    const method = event.requestContext.http.method;
    const requestInit = {
        headers,
        method,
    };
    if (event.body) {
        requestInit.body = event.isBase64Encoded
            ? decodeBase64(event.body)
            : event.body;
    }
    return new Request(url, requestInit);
};
export const createResponse = async (res) => {
    const contentType = res.headers.get("content-type");
    let isBase64Encoded = contentType && isContentTypeBinary(contentType) ? true : false;
    if (!isBase64Encoded) {
        const contentEncoding = res.headers.get("content-encoding");
        isBase64Encoded = isContentEncodingBinary(contentEncoding);
    }
    const body = isBase64Encoded
        ? encodeBase64(await res.arrayBuffer())
        : await res.text();
    const headers = {};
    res.headers.forEach((value, key) => {
        headers[key] = value;
    });
    return {
        statusCode: res.status,
        headers,
        body,
        isBase64Encoded,
    };
};
export const isContentTypeBinary = (contentType) => {
    return !/^(text\/(plain|html|css|javascript|csv).*|application\/(.*json|.*xml).*|image\/svg\+xml.*)$/.test(contentType);
};
export const isContentEncodingBinary = (contentEncoding) => {
    if (contentEncoding === null) {
        return false;
    }
    return /^(gzip|deflate|compress|br)/.test(contentEncoding);
};