Question

我正在尝试使用reactJS和推送器创建聊天应用，我收到此错误 -

无法从localhost：3000代理请求/推送/身份验证 http://localhost:5000（ECONNREFUSED）

在package.json文件中的

我将代理设置为 -

"proxy": "http://localhost:5000"

我的localhost在127.0.0.1文件中定义为/etc/hosts 我还使用netstat检查了端口可用性，但这些似乎都是正确的。有人可以帮忙吗？

Answer 1

我在我的React App中有一个相同的问题，我通过在package.json文件中的端口号后面添加“ /”来解决它（现在是：“ proxy”：“ http://localhost:5000/”）

Answer 2

在你的服务器package.json中添加--ignore client到你的＆＃34; start＆＃34;或者＆＃34;服务器＆＃34;脚本。所以它看起来像这样：

 "scripts": {
 "start": "node index.js",
 "server": "nodemon index.js --ignore client"
 }

Answer 3

我在Mac计算机中遇到了类似的问题。我将/home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require': libMagickCore-6.Q16.so.2: cannot open shared object file: No such file or directory - /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rmagick-2.15.0/lib/RMagick2.so (LoadError) from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rmagick-2.15.0/lib/rmagick_internal.rb:12:in `<top (required)>' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rmagick-2.15.0/lib/rmagick.rb:1:in `<top (required)>' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler/runtime.rb:81:in `require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler/runtime.rb:81:in `block (2 levels) in require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler/runtime.rb:76:in `each' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler/runtime.rb:76:in `block in require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler/runtime.rb:65:in `each' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler/runtime.rb:65:in `require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/site_ruby/2.2.0/bundler.rb:114:in `require' from /home/effectech/workspace/hotel_management/config/application.rb:7:in `<top (required)>' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:78:in `require' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:78:in `block in server' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>' from /home/effectech/workspace/hotel_management/bin/rails:9:in `require' from /home/effectech/workspace/hotel_management/bin/rails:9:in `<top (required)>' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/bin/spring:49:in `<top (required)>' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load' from /home/effectech/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>' from /home/effectech/workspace/hotel_management/bin/spring:15:in `require' from /home/effectech/workspace/hotel_management/bin/spring:15:in `<top (required)>' from bin/rails:3:in `load' from bin/rails:3:in `<main>'更改为localhost，这对我有用。

对于Windows：

127.0.0.1

对于Mac：

"proxy": {
  "/auth/google": {
    "target": "localhost:5000"
  }
}

Answer 4

在您的节点模块中包括

{
...
  "proxy": "http://127.0.0.1:5000"
}

...在哪里……只是意味着您应该将代理ip附加到它。

此外，如果您使用的是axios，则执行axios.post('api/users')会起作用，而不是axios.post('/api/users')

Answer 5

在服务器目录中

npm install --save http-proxy-middleware

然后创建一个具有以下名称的文件：setupProxy.js 在客户端react文件夹的src目录中

然后添加以下内容

const proxy = require("http-proxy-middleware");
module.exports = function(app) {
  app.use(proxy("/api/**", { // https://github.com/chimurai/http-proxy-middleware
    target: "http://localhost:5000",
    secure: false
  }));
};

在代理配置中，请确保您匹配任何路径不仅带有双** *

注意：您在其他任何地方都不需要此代理就是这样

注意：删除package.json中的所有其他代理设置 有关更多信息，请检查此reference

Answer 6

对于那些使用 Docker 的人，如果您的 docker-compose.yml 看起来像：

services:
  app:
    ...
    depends_on:
      - api
    ports:
      - 3000:xxxx
    ...
  api:
    ...
    ports:
      - 5000:xxxx
    ...

然后我们应该将代理 URL 设置为

  "proxy": "http://host.docker.internal:5000"

Answer 7

如果您无法通过telnet连接到端口5000上的localhost（如果您没有安装telnet，则可以下载并使用PuttY），这意味着服务器未运行。

如果您使用的是Windows计算机，请转到package.json以获取在端口5000上运行的服务器并更改此行：

,Andy "Blank,

对此：

"start": "./node_modules/.bin/concurrently \"./node_modules/.bin/nodemon\" \"npm run client\"",

观看构建消息，您应该看到类似于以下内容的内容：

"start": "./node_modules/.bin/concurrently \"npm run server\" \"npm run client\"",

Answer 8

我有类似的问题。问题是服务器正在侦听ipv6 :: 1地址并且代理连接到ipv4 127.0.0.1

我将两个地址从localhost更改为127.0.0.1

Answer 9

我认为服务器无法正常运行，为此，您应同时运行客户端和服务器，并在 package.json 文件

中添加以下步骤

1）同时安装

npm install concurrently --save

2）配置客户端和服务器

"server": "nodemon server.js",
"client": "npm start --prefix client"

3）同时配置

"dev": "concurrently "npm run server" "npm run client""

Answer 10

使用 “代理”：“ http://localhost:PORT_NUMBER/” 在package.json中

以及在axios后端调用路由中，例如使用 axios.get（“ api / user / getinfo”）代替 axios.get（“ / api / user / getinfo”）;

Answer 11

我的问题是试图在docker容器打开的情况下运行我的react项目。

更改端口或关闭容器。

Answer 12

在我的情况下，问题是我一直用错误的名称访问PORT，我使用的是PORT而不是SERVER_PORT，这是我正确的环境变量名称。因此，此问题意味着您的代码有问题，在我的情况下，服务器应在其上运行的端口未定义。

Answer 13

我认为您尚未启动后端服务器。尝试同时启动后端服务器和前端服务器。只需在后端和前端同时运行void read_adc_Voltage() { int arr[100]; int arr1[100]; int max = arr[0]; arr[0]=0; int i,j=0; int count = 6; for (i=1;i<count;i++) { var=(ain1Buff[sampleCounter]); voltage=var*((float)3.3/(float)4095); arr[j] = voltage; if(arr[j] > max) { max = arr[j]; } j++; } sprintf(data1,"%.2f",max); LCD_String_xy(1,1,data1); sampleCounter++; if(sampleCounter==6) { sampleCounter=0; } }。

Answer 14

如果您不打算在服务器端同时使用，则只需分别运行每个前端和后端，这样服务器端应首先运行而客户端应最后运行。

Answer 15

将 localhost 更改为 [::1] 解决了我的问题。

取自此处https://forum.vuejs.org/t/proxy-error-with-vue-config-js-and-axios/110632/4?u=mahmoodvcs

Answer 16

这与 create-react-app 的默认设置有关。

我从 Github Issue 找到了解决方案。阅读 danielmahon 于 2018 年 3 月 15 日的回复

"proxy": {
    "/api": {
      "target": "https://localhost:5002",
      "secure": false
    }
  },

无法将请求/推送/身份验证从localhost：3000代理到http：// localhost：5000（ECONNREFUSED）

16 个答案: