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object field variable fetch system, Supports Lazy fetch with field access.
npm install linkfetch
{
"$ref": "lazy end point"
}
ex)
{
"name": "my name is linkfetch",
"address": {
"$ref": "https://localhost/user/1/address"
}
}
export type User = {
name: string;
id: string;
address: {
detail: {
first: string;
last: string;
};
zip: string;
}
}
import { User } from './types/User';
import { Fetcher, FetchObjectOrDocType, FetchRequest, linkfetch } from 'linkfetch';
type Req = {
id: string;
queryId: string;
}
const doc: FetchObjectOrDocType<User> = {
$ref: 'http://localhost:3000/users/1',
};
const defaultRequest: FetchRequest<User, Req> = {
$request: {id: '1', queryId: 'q1'},
address: {
$request: {id: '2', queryId: 'q2'},
detail: {
$request: {id: '3', queryId: 'q3'}
}
}
}
const fetcher: Fetcher<Req> = async (doc, config) => {
if (doc) {
const url = new URL(doc.$ref);
url.searchParams.set('queryId', config?.req?.queryId ?? 'none');
const responsePromise = fetch(url, {method: 'GET'});
return responsePromise.then(it => it.json());
} else {
return Promise.resolve(config?.value);
}
}
(async () => {
console.log('lazy fetch------------------');
const root = await linkfetch<User, Req>({data: doc, defaultRequest: defaultRequest}, fetcher, {linkfetchConfig: {cached: true}});
const address = await root.address();
const detail = await root.$$fetch({key: 'address.detail', req: {id: '1', queryId: 'zzzzz'}});
console.log('address', address);
console.log('detail', detail);
console.log('JSON stringify:', JSON.stringify(await root.$$snapshot({allFetch: true})));
console.log('request all fetch------------------');
const requestData = await fetch('http://localhost:3000/users', {method: 'post', headers: {'Accept': 'application/json, text/plain, */*', 'Content-Type': 'application/json'}, body: JSON.stringify(defaultRequest)}).then(it => it.json())
console.log('requestData', requestData);
const request = await linkfetch<User, Req>({data: requestData, defaultRequest: defaultRequest}, fetcher, {linkfetchConfig: {cached: true}});
console.log('JSON stringify:', JSON.stringify(await request.$$snapshot({allFetch: true})));
})();
import express, { Express } from 'express';
import cors from 'cors';
import { FetchProducerDoc, producer, FlatObjectKey } from 'linkfetch';
import { User } from './types/User';
const corsOptions = {
origin: '*',
credentials: true,
optionSuccessStatus: 200,
}
type Reg = { id: string, queryId?: string};
const doc: FetchProducerDoc<User, Reg> = {
$fetch: async (req) => {
return {
name: 'linkfetch',
id: req.id + `(queryId:${req.queryId})`,
address: {
$ref: `http://localhost:3000/users/${req.id}/address`
}
}
},
address: {
$fetch: async (req) => {
return {
zip: '6484' + `(queryId:${req.queryId})`,
detail: {
// first: 'first',
// last: 'last',
$ref: `http://localhost:3000/users/${req.id}/address/detail`
}
}
},
detail: {
$fetch: async (req) => {
return {
first: `first-88 ${req.id}` + `(queryId:${req.queryId})`,
last: `last-64-${req.id}` + `(queryId:${req.queryId})`
}
}
}
}
}
const root = producer(doc);
const app: Express = express();
app.use(cors(corsOptions)) // Use this after the variable declaration
app.use(express.json());
app.get('/', (req, res) => {
res.send('Hello World! linkfetch server');
});
app.post('/users', async (req, res) => {
const data = await root.$$request(req.body);
console.log('user--!! server, body post');
res.json(data);
});
app.get('/users/:id', async (req, res) => {
console.log('request path', req.path, req.params.id);
const data = await root.$$fetch({req: {id: req.params.id, queryId: req.query.queryId as string}});
res.json(data);
});
app.get('/users/:id/*', async (req, res) => {
const paths = req.path.split('/').splice(3).join('.') as keyof FlatObjectKey<User>;
console.log('request path', paths, req.params.id);
const data = await root.$$fetch({key: paths , req: {id: req.params.id, queryId: req.query.queryId as string}})
res.json(data);
});
app.listen(3000, () => {
console.log('Server started at port 3000');
});
FAQs
object field variable fetch system, Supports Lazy fetch with field access.
The npm package linkfetch receives a total of 0 weekly downloads. As such, linkfetch popularity was classified as not popular.
We found that linkfetch demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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