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feat: Add Server Sent Event reload rout and component.

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This commit is contained in:
Sam Tolmay 2021-12-01 11:55:47 +02:00
parent ce126df437
commit a556eabdbb
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GPG Key ID: D004126FCD1A6DF0
5 changed files with 124 additions and 30 deletions
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2
packages/server-dev/next.config.js
View File

@ -7,7 +7,7 @@ module.exports = withLess({
modifyVars: appConfig.style.lessVariables,
},
},
reactStrictMode: true,
// reactStrictMode: true,
webpack: (config, { isServer }) => {
if (!isServer) {
config.resolve.fallback = {

55
packages/server-dev/src/components/Page.js
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@ -21,6 +21,7 @@ import { useRouter } from 'next/router';
import Context from './Context.js';
import Head from './Head.js';
import Block from './block/Block.js';
import Reload from './Reload.js';
import PageConfig from './PageConfig.js';
import setupLink from '../utils/setupLink.js';
@ -37,32 +38,34 @@ const Page = ({ lowdefy }) => {
if (!lowdefy._internal.query.pageId) return <LoadingBlock />;
return (
<PageConfig lowdefy={lowdefy}>
{(pageConfig) => {
return (
<Context config={pageConfig} lowdefy={lowdefy}>
{(context, loading) => {
if (loading) {
return <LoadingBlock />;
}
return (
<>
<Head
properties={context._internal.RootBlocks.map[pageConfig.id].eval.properties}
/>
<Block
block={context._internal.RootBlocks.map[pageConfig.id]}
Blocks={context._internal.RootBlocks}
context={context}
lowdefy={lowdefy}
/>
</>
);
}}
</Context>
);
}}
</PageConfig>
<Reload>
<PageConfig lowdefy={lowdefy}>
{(pageConfig) => {
return (
<Context config={pageConfig} lowdefy={lowdefy}>
{(context, loading) => {
if (loading) {
return <LoadingBlock />;
}
return (
<>
<Head
properties={context._internal.RootBlocks.map[pageConfig.id].eval.properties}
/>
<Block
block={context._internal.RootBlocks.map[pageConfig.id]}
Blocks={context._internal.RootBlocks}
context={context}
lowdefy={lowdefy}
/>
</>
);
}}
</Context>
);
}}
</PageConfig>
</Reload>
);
};

57
packages/server-dev/src/components/Reload.js Normal file
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@ -0,0 +1,57 @@
/*
Copyright 2020-2021 Lowdefy, Inc
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
import React, { useEffect } from 'react';
import { useSWRConfig } from 'swr';
function useMutateCache() {
const { cache, mutate } = useSWRConfig();
return () => {
const keys = ['/api/root'];
for (const key of cache.keys()) {
if (key.startsWith('/api/page')) {
keys.push(key);
}
}
console.log('mutate', keys);
const mutations = keys.map((key) => mutate(key));
return Promise.all(mutations);
};
}
const Reload = ({ children }) => {
const mutateCache = useMutateCache();
useEffect(() => {
const sse = new EventSource('/api/reload');
sse.onmessage = (event) => {
console.log(event);
mutateCache();
};
sse.onerror = (error) => {
console.log('ERROR');
console.error(error);
sse.close();
};
return () => {
sse.close();
};
}, []);
return <>{children}</>;
};
export default Reload;

34
packages/server-dev/src/pages/api/reload.js Normal file
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@ -0,0 +1,34 @@
/*
Copyright 2020-2021 Lowdefy, Inc
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
export const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
const handler = async (req, res) => {
console.log('Update');
res.setHeader('Content-Type', 'text/event-stream;charset=utf-8');
res.setHeader('Cache-Control', 'no-cache, no-transform');
res.setHeader('X-Accel-Buffering', 'no');
res.setHeader('Connection', 'keep-alive');
for (let i = 0; i < 10; i++) {
console.log('Sending event', i);
res.write(`data: Hello seq ${i}\n\n`);
await sleep(1500);
}
res.end('done\n');
};
export default handler;

6
packages/server-dev/src/utils/usePageConfig.js
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@ -17,15 +17,15 @@ import request from './request.js';
// TODO: Handle TokenExpiredError
function fetchPageConfig(pageId) {
return request({ url: `/api/page/${pageId}` });
function fetchPageConfig(url) {
return request({ url });
}
function usePageConfig(pageId) {
if (!pageId) {
pageId = 'NULL';
}
const { data } = useSWR(pageId, fetchPageConfig, { suspense: true });
const { data } = useSWR(`/api/page/${pageId}`, fetchPageConfig, { suspense: true });
return { data };
}