我正在尝试学习 React,在多次尝试运行 React 服务器端渲染的配置后,我已将代码简化为最简单的示例,但我仍然无法理解为什么它不起作用。
案例
我的 Controller :
$router = $container->get(Router::class);
$router->get('/test/{name:.*}', function ($request) use ($container) {
/** @var $request \GuzzleHttp\Psr7\ServerRequest **/
$client = new Client(['base_uri' => 'http://localhost:3000']);
$response = $client->post('/', [
'query' => ['module' => 'App'],
]);
$contents = $response->getBody()->getContents();
return $contents;
});
我正在使用 GuzzleHttp 库
我的服务器配置:
/path/to/project/resources/server.js =>/path/to/project/server.js
import express from 'express'
import React from 'react'
import ReactDOMServer from 'react-dom/server'
let app = express()
app.use('/', (request, response) => {
try {
let App = require('../public/dist/js/' + request.query.module)
response.send(
ReactDOMServer.renderToString(<App/>)
)
} catch (error) {
response.status(500).send(error.message)
}
})
app.listen(3000)
我的组件
/path/to/project/resources/assets/js/App.jsx =>/path/to/project/public/dist/js/App.js
import React from 'react';
class App extends React.Component {
render () {
return <h1>Hello World!</h1>;
}
}
module.exports = App;
我的 webpack 配置
const path = require('path');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
const UglifyJsPlugin = require ('uglifyjs-webpack-plugin');
function assets(path) {
return './resources/assets/' + path;
}
const config = {
entry: [
assets('js/App.jsx'),
assets('sass/app.scss')
],
output: {
path: path.resolve(__dirname, 'public/dist'),
filename: 'js/App.js',
publicPath: '/dist/'
},
resolve: {
extensions: ['.js', '.jsx']
},
module: {
rules: [
{ // es2015
test: /\.(js|jsx)/,
use: ['babel-loader'],
exclude: [/node_modules/]
},
{ // css / sass / scss loaders
test: /\.(css|sass|scss)$/,
use: ExtractTextPlugin.extract({
use: ['css-loader', 'sass-loader'],
})
}
]
},
plugins: [
new ExtractTextPlugin({
filename: 'css/[name].bundle.css',
allChunks: true
}),
new UglifyJsPlugin()
]
};
const server = {
entry: [
'./resources/server.js'
],
output: {
path: path.resolve(__dirname, '.'),
filename: 'server.js',
publicPath: '/dist/'
},
resolve: {
extensions: ['.js', '.jsx']
},
module: {
rules: [
{ // es2015
test: /\.(js|jsx)/,
use: ['babel-loader'],
exclude: [/node_modules/]
}
]
},
plugins: [
//new UglifyJsPlugin()
],
target: 'node'
};
module.exports = [config, server];
Babelrc 配置
{
"presets": ["es2015", "react"]
}
结果
- 我在使用 Guzzle 时遇到错误
500 Internal Server Error
response: element.type.toLowerCase is not a function
- 使用 NodeJS 时遇到的错误
Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports. in Unknown
- 捆绑文件后我会得到什么:
我尝试了很多不同的方法,但我不明白为什么会抛出错误。
<小时/>编辑:
通过此配置,我能够使事情正常工作,问题似乎来自导入部分:
import express from 'express'
import * as React from 'react'
import ReactDOMServer from 'react-dom/server'
let app = express()
class App extends React.Component {
render () {
return <h1>Hello World!</h1>;
}
}
const component = <App />;
app.use('/', (request, response) => {
try {
response.send(
ReactDOMServer.renderToString(component)
)
} catch (error) {
response.status(500).send(error.message)
}
})
app.listen(3000)
编辑2:
这是我从 .npm 检索的日志
0 info it worked if it ends with ok
1 verbose cli [ '/usr/bin/node', '/usr/bin/npm', 'start' ]
2 info using npm@5.6.0
3 info using node@v8.9.4
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle Framework@1.0.0~prestart: Framework@1.0.0
6 info lifecycle Framework@1.0.0~start: Framework@1.0.0
7 verbose lifecycle Framework@1.0.0~start: unsafe-perm in lifecycle true
8 verbose lifecycle Framework@1.0.0~start: PATH: /usr/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/home/dev/www/node_modules/.bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
9 verbose lifecycle Framework@1.0.0~start: CWD: /home/dev/www
10 silly lifecycle Framework@1.0.0~start: Args: [ '-c', 'node server.js' ]
11 silly lifecycle Framework@1.0.0~start: Returned: code: 1 signal: null
12 info lifecycle Framework@1.0.0~start: Failed to exec start script
13 verbose stack Error: Framework@1.0.0 start: `node server.js`
13 verbose stack Exit status 1
13 verbose stack at EventEmitter.<anonymous> (/usr/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:285:16)
13 verbose stack at emitTwo (events.js:126:13)
13 verbose stack at EventEmitter.emit (events.js:214:7)
13 verbose stack at ChildProcess.<anonymous> (/usr/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack at emitTwo (events.js:126:13)
13 verbose stack at ChildProcess.emit (events.js:214:7)
13 verbose stack at maybeClose (internal/child_process.js:925:16)
13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
14 verbose pkgid Framework@1.0.0
15 verbose cwd /home/dev/www
16 verbose Linux 4.9.0-4-amd64
17 verbose argv "/usr/bin/node" "/usr/bin/npm" "start"
18 verbose node v8.9.4
19 verbose npm v5.6.0
20 error code ELIFECYCLE
21 error errno 1
22 error Framework@1.0.0 start: `node server.js`
22 error Exit status 1
23 error Failed at the Framework@1.0.0 start script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 1, true ]
最佳答案
在您的组件中尝试。
import * as React from 'react';
class App extends React.Component {
render () {
return <h1>Hello World!</h1>;
}
}
module.exports = App;
可能只是从 react 包中选择默认导出。
关于php - 使用 Webpack Express 和 React 进行服务器端渲染,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48755979/