我正在学习http2
,nodejs
但发现一个问题pushStream
方法不起作用
(客户端在开发者工具上不显示“Pushed/[fileName]”)
不知是不是nodejs版本的原因(我安装的是最新版本v9.8.0)
我的代码如下:
服务器.js
'use strict'
const fs = require('fs');
const path = require('path');
const http2 = require('http2');
const utils = require('./utils');
const { HTTP2_HEADER_PATH } = http2.constants;
const PORT = process.env.PORT || 3000;
// The files are pushed to stream here
function push(stream, path) {
const file = utils.getFile(path);
if (!file) {
return;
}
stream.pushStream({ [HTTP2_HEADER_PATH]: path}, (err, pushStream, headers) => {
if (err) throw err;
pushStream.respondWithFD(file.content, file.headers)
});
}
// Request handler
function onRequest(req, res) {
const reqPath = req.headers[':path'] === '/' ? '/index.html' : req.headers[':path']
const file = utils.getFile(reqPath);
// 404 - File not found
if (!file) {
res.statusCode = 404;
res.end();
return;
}
// Push with index.html
if (reqPath === '/index.html') {
push(res.stream, '/assets/main.js');
push(res.stream, '/assets/style.css');
} else {
console.log("requiring non index.html")
}
// Serve file
res.stream.respondWithFD(file.content, file.headers);
}
// creating an http2 server
const server = http2.createSecureServer({
cert: fs.readFileSync(path.join(__dirname, '/certificate.crt')),
key: fs.readFileSync(path.join(__dirname, '/privateKey.key'))
}, onRequest);
// start listening
server.listen(PORT, (err) => {
if (err) {
console.error(err);
return -1;
}
console.log(`Server listening to port ${PORT}`);
});
实用程序.js
'use strict';
const fs = require('fs');
const mime = require('mime');
module.exports = {
getFile: function (path) {
const filePath = `${__dirname}/public${path}`;
try {
const content = fs.openSync(filePath, 'r');
const contentType = mime.getType(filePath);
return {
content,
headers: {
'content-type': contentType
}
};
} catch (e) {
return null;
}
}
}
2020 年 01 月 28 日更新
已解决:原因是chrome v65最新版本。有错误,导致客户端不信任PUSH_PROMISE
框架。我备份了 chrome v64,然后它现在可以工作了。