[Vue Error] Could not proxy request

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Background

Calling backend API, the status code of the response is 500, but the backend is not throw exceptions. The HTTP response message is “Proxy error: Could not proxy request”.

Error Info

Proxy error: Could not proxy request /captchaImage from localhost:8070 to http://10.0.0.74:8090 (ECONNREFUSED).

Solutions

  1. Make sure the config devServer.proxy.target is correct.

vue.config.js

devServer: {
    ...
    proxy: {
      [process.env.VUE_APP_BASE_API]: {
        target: `http://localhost:8090`,
        ...
      }
    },
}
  1. Make sure you can visit the backend server anonymous request APIs in your PC, e.g. http://localhost:8090/captchaImage.

Reasons

The config devServer.proxy.target has no http prefix. e.g. target: localhost:8090.

Or the port number of backend server is not correct.