vue-element-admin请求接口时报错：431 Request Header Fields Too Large

vue-element-admin请求接口时报错：431 Request Header Fields Too Large

1、使用vue-element-admin框架开发运行后报错431，在网上也找了一些解决方案，有说是生成的Token太大导致的报错，也说有可能是NGINX后台设置的提交大小限制。这里我看了一下文件配置vue.config.js

module.exports = {
	publicPath: '/',
	outputDir: 'dist',
	assetsDir: 'static',
	lintOnSave: process.env.NODE_ENV === 'development',
	productionSourceMap: false,
	devServer: {
		port: port,
		open: true,
		overlay: {
			warnings: false,
			errors: true
		},
		// before: require('./mock/mock-server.js')
		proxy: {
			[process.env.VUE_APP_BASE_API]: {
				target: `http://127.0.0.1:${port}`,
				changeOrigin: true,
				pathRewrite: {
					["^" + process.env.VUE_APP_BASE_API]: ""
				}
			}
		},
		host: 'localhost'
	},
	configureWebpack: {
		// provide the app's title in webpack's name field, so that
		// it can be accessed in index.html to inject the correct title.
		name: name,
		resolve: {
			alias: {
				'@': resolve('src')
			}
		}
	},
	chainWebpack(config) {
		// it can improve the speed of the first screen, it is recommended to turn on preload
		// it can improve the speed of the first screen, it is recommended to turn on preload
		config.plugin('preload').tap(() => [{
			rel: 'preload',
			// to ignore runtime.js
			// https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
			fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
			include: 'initial'
		}])

		// when there are many pages, it will cause too many meaningless requests
		config.plugins.delete('prefetch')

		// set svg-sprite-loader
		config.module
			.rule('svg')
			.exclude.add(resolve('src/icons'))
			.end()
		config.module
			.rule('icons')
			.test(/\.svg$/)
			.include.add(resolve('src/icons'))
			.end()
			.use('svg-sprite-loader')
			.loader('svg-sprite-loader')
			.options({
				symbolId: 'icon-[name]'
			})
			.end()

		config
			.when(process.env.NODE_ENV !== 'development',
				config => {
					config
						.plugin('ScriptExtHtmlWebpackPlugin')
						.after('html')
						.use('script-ext-html-webpack-plugin', [{
							// `runtime` must same as runtimeChunk name. default is `runtime`
							inline: /runtime\..*\.js$/
						}])
						.end()
					config
						.optimization.splitChunks({
							chunks: 'all',
							cacheGroups: {
								libs: {
									name: 'chunk-libs',
									test: /[\\/]node_modules[\\/]/,
									priority: 10,
									chunks: 'initial' // only package third parties that are initially dependent
								},
								elementUI: {
									name: 'chunk-elementUI', // split elementUI into a single package
									priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
									test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
								},
								commons: {
									name: 'chunk-commons',
									test: resolve('src/components'), // can customize your rules
									minChunks: 3, //  minimum common number
									priority: 5,
									reuseExistingChunk: true
								}
							}
						})
					// https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
					config.optimization.runtimeChunk('single')
				}
			)
	}
}

发现这里代理的后台请求地址端口为前端框架运行的端口，所请求的结果地址错误了

这样就可以了，如果修改完后还是出现问题，那就可以考虑下开篇说的问题了，可参考浏览器返回431问题分析 - 简书