dillonkearns/elm-pages-v3-beta
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Handle incoming content.json requests in render serverless function.

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This commit is contained in:
Dillon Kearns 2021-03-29 08:59:53 -07:00
parent 115d985260
commit 11835f155f
2 changed files with 50 additions and 9 deletions
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29
examples/docs/functions/render/index.js
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@ -13,16 +13,33 @@ exports.handler =
try {
const renderResult = await renderer(compiledElmPath, event.path, event);
return {
body: renderResult.htmlString,
statusCode: 200,
};
if (renderResult.kind === "json") {
return {
body: renderResult.contentJson,
headers: {
"Content-Type": "application/json",
"x-powered-by": "elm-pages",
},
statusCode: 200,
};
} else {
return {
body: renderResult.htmlString,
headers: {
"Content-Type": "text/html",
"x-powered-by": "elm-pages",
},
statusCode: 200,
};
}
} catch (error) {
return {
// body: JSON.stringify({ error }),
body: `<body><h1>Error</h1><pre>${error}</pre></body>`,
statusCode: 500,
headers: [{ "content-type": "text/html" }],
headers: {
"Content-Type": "text/html",
"x-powered-by": "elm-pages",
},
};
}
};

30
generator/src/render.js
View File

@ -28,13 +28,23 @@ module.exports =
* @param {string} compiledElmPath
* @param {string} path
* @param {import('aws-lambda').APIGatewayProxyEvent} request
* @returns {Promise<({ kind: 'json'; contentJson: string} | { kind: 'html'; htmlString: string })>}
*/
function runElmApp(compiledElmPath, path, request) {
return new Promise((resolve, reject) => {
const isJson = path.match(/content\.json\/?$/);
const route = path.replace(/content\.json\/?$/, "");
const mode /** @type { "dev" | "prod" } */ = "elm-to-html-beta";
const staticHttpCache = {};
const modifiedRequest = { ...request, path: route };
const app = require(compiledElmPath).Elm.Main.init({
flags: { secrets: process.env, mode, staticHttpCache, request },
flags: {
secrets: process.env,
mode,
staticHttpCache,
request: modifiedRequest,
},
});
app.ports.toJsPort.subscribe((/** @type { FromElm } */ fromElm) => {
@ -42,8 +52,21 @@ function runElmApp(compiledElmPath, path, request) {
console.log(fromElm.value);
} else if (fromElm.tag === "PageProgress") {
const args = fromElm.args[0];
if ("/" + args.route === path) {
resolve(outputString(fromElm));
if (isJson) {
if ("/" + args.route === route) {
let contentJson = {};
contentJson["body"] = args.body;
contentJson["staticData"] = args.contentJson;
resolve({
kind: "json",
contentJson: JSON.stringify(contentJson),
});
}
} else {
if ("/" + args.route === route) {
resolve(outputString(fromElm));
}
}
} else if (fromElm.tag === "Errors") {
foundErrors = true;
@ -108,6 +131,7 @@ async function outputString(/** @type { PageProgress } */ fromElm) {
return {
route: normalizedRoute,
htmlString: wrapHtml(args, contentJsonString),
kind: "html",
};
}