mirror of
https://github.com/dillonkearns/elm-pages-v3-beta.git
synced 2024-11-24 06:54:03 +03:00
343 lines
9.3 KiB
JavaScript
343 lines
9.3 KiB
JavaScript
const fs = require("fs");
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async function run({
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renderFunctionFilePath,
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routePatterns,
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apiRoutePatterns,
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}) {
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ensureDirSync("functions/render");
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ensureDirSync("functions/server-render");
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fs.copyFileSync(
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renderFunctionFilePath,
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"./functions/render/elm-pages-cli.js"
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);
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fs.copyFileSync(
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renderFunctionFilePath,
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"./functions/server-render/elm-pages-cli.js"
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);
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const processedHtml = fs.readFileSync(
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"./dist/elm-stuff/elm-pages/index.html",
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"utf-8"
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);
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fs.writeFileSync(
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"./functions/render/index.js",
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rendererCode(true, processedHtml)
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);
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fs.writeFileSync(
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"./functions/server-render/index.js",
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rendererCode(false, processedHtml)
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);
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// TODO rename functions/render to functions/fallback-render
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// TODO prepend instead of writing file
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const apiServerRoutes = apiRoutePatterns.filter(isServerSide);
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ensureValidRoutePatternsForNetlify(apiServerRoutes);
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// TODO filter apiRoutePatterns on is server side
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// TODO need information on whether api route is odb or serverless
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const apiRouteRedirects = apiServerRoutes
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.map((apiRoute) => {
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if (apiRoute.kind === "prerender-with-fallback") {
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return `${apiPatternToRedirectPattern(
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apiRoute.pathPattern
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)} /.netlify/builders/render 200`;
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} else if (apiRoute.kind === "serverless") {
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return `${apiPatternToRedirectPattern(
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apiRoute.pathPattern
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)} /.netlify/functions/server-render 200`;
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} else {
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throw "Unhandled 2";
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}
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})
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.join("\n");
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const redirectsFile =
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routePatterns
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.filter(isServerSide)
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.map((route) => {
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if (route.kind === "prerender-with-fallback") {
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return `${route.pathPattern} /.netlify/builders/render 200
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${route.pathPattern}/content.dat /.netlify/builders/render 200`;
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} else {
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return `${route.pathPattern} /.netlify/functions/server-render 200
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${route.pathPattern}/content.dat /.netlify/functions/server-render 200`;
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}
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})
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.join("\n") +
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"\n" +
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apiRouteRedirects +
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"\n";
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fs.writeFileSync("dist/_redirects", redirectsFile);
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}
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function ensureValidRoutePatternsForNetlify(apiRoutePatterns) {
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const invalidNetlifyRoutes = apiRoutePatterns.filter((apiRoute) =>
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apiRoute.pathPattern.some(({ kind }) => kind === "hybrid")
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);
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if (invalidNetlifyRoutes.length > 0) {
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throw (
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"Invalid Netlify routes!\n" +
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invalidNetlifyRoutes
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.map((value) => JSON.stringify(value, null, 2))
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.join(", ")
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);
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}
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}
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function isServerSide(route) {
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return (
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route.kind === "prerender-with-fallback" || route.kind === "serverless"
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);
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}
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(async function () {
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try {
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await run({
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renderFunctionFilePath: "./elm-stuff/elm-pages/elm.js",
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routePatterns: JSON.parse(fs.readFileSync("dist/route-patterns.json")),
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apiRoutePatterns: JSON.parse(fs.readFileSync("dist/api-patterns.json")),
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});
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console.log("Success - Adapter script complete");
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} catch (error) {
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console.error("ERROR - Adapter script failed");
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try {
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console.error(JSON.stringify(error));
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} catch (parsingError) {
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console.error(error);
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}
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process.exit(1);
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}
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})();
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/**
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* @param {boolean} isOnDemand
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* @param {string} processedHtml
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*/
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function rendererCode(isOnDemand, processedHtml) {
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return `const path = require("path");
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const cookie = require("cookie");
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const busboy = require("busboy");
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const processedHtml = ${JSON.stringify(processedHtml)};
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${
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isOnDemand
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? `const { builder } = require("@netlify/functions");
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exports.handler = builder(render);`
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: `
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exports.handler = render;`
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}
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/**
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* @param {import('aws-lambda').APIGatewayProxyEvent} event
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* @param {any} context
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*/
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async function render(event, context) {
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const requestTime = new Date();
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console.log(JSON.stringify(event));
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global.staticHttpCache = {};
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const compiledElmPath = path.join(__dirname, "elm-pages-cli.js");
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const renderer = require("../../../../generator/src/render");
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const preRenderHtml = require("../../../../generator/src/pre-render-html");
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try {
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const basePath = "/";
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const mode = "build";
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const addWatcher = () => {};
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const renderResult = await renderer(
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basePath,
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require(compiledElmPath),
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mode,
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event.path,
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await reqToJson(event, requestTime),
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addWatcher,
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false
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);
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console.log("@@@renderResult", JSON.stringify(renderResult, null, 2));
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const statusCode = renderResult.is404 ? 404 : renderResult.statusCode;
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if (renderResult.kind === "bytes") {
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return {
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body: Buffer.from(renderResult.contentDatPayload.buffer).toString("base64"),
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isBase64Encoded: true,
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headers: {
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"Content-Type": "application/octet-stream",
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"x-powered-by": "elm-pages",
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...renderResult.headers,
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},
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statusCode,
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};
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} else if (renderResult.kind === "api-response") {
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const serverResponse = renderResult.body;
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return {
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body: serverResponse.body,
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multiValueHeaders: serverResponse.headers,
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statusCode: serverResponse.statusCode,
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isBase64Encoded: serverResponse.isBase64Encoded,
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};
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} else {
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console.log('@rendering', preRenderHtml.replaceTemplate(processedHtml, renderResult.htmlString))
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return {
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body: preRenderHtml.replaceTemplate(processedHtml, renderResult.htmlString),
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headers: {
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"Content-Type": "text/html",
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"x-powered-by": "elm-pages",
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...renderResult.headers,
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},
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statusCode,
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};
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}
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} catch (error) {
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console.error(error);
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return {
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body: \`<body><h1>Error</h1><pre>\${error.toString()}</pre></body>\`,
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statusCode: 500,
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headers: {
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"Content-Type": "text/html",
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"x-powered-by": "elm-pages",
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},
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};
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}
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}
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/**
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* @param {import('aws-lambda').APIGatewayProxyEvent} req
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* @param {Date} requestTime
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* @returns {Promise<{ method: string; hostname: string; query: Record<string, string | undefined>; headers: Record<string, string>; host: string; pathname: string; port: number | null; protocol: string; rawUrl: string; }>}
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*/
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function reqToJson(req, requestTime) {
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return new Promise((resolve, reject) => {
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if (
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req.httpMethod && req.httpMethod.toUpperCase() === "POST" &&
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req.headers["content-type"] &&
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req.headers["content-type"].includes("multipart/form-data") &&
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req.body
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) {
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try {
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console.log('@@@1');
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const bb = busboy({
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headers: req.headers,
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});
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let fields = {};
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bb.on("file", (fieldname, file, info) => {
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console.log('@@@2');
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const { filename, encoding, mimeType } = info;
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file.on("data", (data) => {
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fields[fieldname] = {
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filename,
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mimeType,
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body: data.toString(),
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};
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});
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});
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bb.on("field", (fieldName, value) => {
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console.log("@@@field", fieldName, value);
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fields[fieldName] = value;
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});
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// TODO skip parsing JSON and form data body if busboy doesn't run
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bb.on("close", () => {
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console.log('@@@3');
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console.log("@@@close", fields);
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resolve(toJsonHelper(req, requestTime, fields));
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});
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console.log('@@@4');
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if (req.isBase64Encoded) {
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bb.write(Buffer.from(req.body, 'base64').toString('utf8'));
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} else {
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bb.write(req.body);
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}
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} catch (error) {
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console.error('@@@5', error);
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resolve(toJsonHelper(req, requestTime, null));
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}
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} else {
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console.log('@@@6');
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resolve(toJsonHelper(req, requestTime, null));
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}
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});
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}
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function toJsonHelper(req, requestTime, multiPartFormData) {
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let jsonBody = null;
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try {
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jsonBody = req.body && JSON.parse(req.body);
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} catch (jsonParseError) {}
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return {
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method: req.httpMethod,
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hostname: "TODO",
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query: req.queryStringParameters || {},
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headers: req.headers,
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host: "", // TODO
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pathname: req.path,
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port: 80, // TODO
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protocol: "https", // TODO
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rawUrl: "", // TODO
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body: req.body,
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requestTime: Math.round(requestTime.getTime()),
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cookies: cookie.parse(req.headers.cookie || ""),
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// TODO skip parsing if content-type is not x-www-form-urlencoded
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formData: paramsToObject(new URLSearchParams(req.body || "")),
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multiPartFormData: multiPartFormData,
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jsonBody: jsonBody,
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};
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}
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function paramsToObject(entries) {
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const result = {};
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for (const [key, value] of entries) {
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result[key] = value || "";
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}
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return result;
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}
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`;
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}
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/**
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* @param {fs.PathLike} dirpath
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*/
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function ensureDirSync(dirpath) {
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try {
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fs.mkdirSync(dirpath, { recursive: true });
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} catch (err) {
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if (err.code !== "EEXIST") throw err;
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}
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}
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/** @typedef {{kind: 'dynamic'} | {kind: 'literal', value: string}} ApiSegment */
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/**
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* @param {ApiSegment[]} pathPattern
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*/
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function apiPatternToRedirectPattern(pathPattern) {
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return (
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"/" +
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pathPattern
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.map((segment, index) => {
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switch (segment.kind) {
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case "literal": {
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return segment.value;
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}
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case "dynamic": {
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return `:dynamic${index}`; // TODO need to assign different names for each dynamic segment?
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}
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default: {
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throw "Unhandled segment: " + JSON.stringify(segment);
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}
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}
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})
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.join("/")
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);
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}
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