78 lines
2.0 KiB
JavaScript
78 lines
2.0 KiB
JavaScript
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const http = require('http');
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const url = require("url");
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const util = require('util');
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const { createChart } = require('@antv/g2-ssr');
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const port = 3000;
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const { getPieOptions } = require('./charts/pie.js');
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const { getLineOptions } = require('./charts/line.js');
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const { getColumnOptions } = require('./charts/column.js');
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const { getBarOptions } = require('./charts/bar.js');
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http.createServer((req, res) => {
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res.statusCode = 200,
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res.setHeader('Content-Type', 'text/plain;charset=utf-8');
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if (req.method === 'GET') {
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toGet(req, res);
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} else if (req.method === 'POST') {
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toPost(req, res);
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}
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}).listen(port, () => {
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console.info(`Server listening on: http://localhost:${port}`);
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});
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function getOptions(type, axis, data) {
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const base_options = {
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width: 640,
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height: 480,
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imageType: 'png',
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theme: {
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view: {
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viewFill: '#FFFFFF',
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},
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}
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}
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switch (type) {
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case 'bar':
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return getBarOptions(base_options, axis, data);
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case 'column':
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return getColumnOptions(base_options, axis, data);
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case 'line':
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return getLineOptions(base_options, axis, data);
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case 'pie':
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return getPieOptions(base_options, axis, data);
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}
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return base_options
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}
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// 创建 Chart 和配置
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async function GenerateCharts(obj) {
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const options = getOptions(obj.type, JSON.parse(obj.axis), JSON.parse(obj.data));
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const chart = await createChart(options);
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// 导出
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chart.exportToFile(obj.path || 'chart');
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// -> chart.png
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chart.toBuffer();
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}
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// -> get buffer
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//获取GET请求内容
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function toGet(req, res) {
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let data = 'GET请求内容：\n' + util.inspect(url.parse(req.url));
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res.end(data);
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}
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//获取POST请求内容、cookie
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function toPost(req, res) {
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req.on('data', async function (chunk) {
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await GenerateCharts(JSON.parse(chunk))
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res.end('complete');
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});
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}
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