reactJS中没有'Access-Control-Allow-Origin [英] No 'Access-Control-Allow-Origin in reactJS

问题描述

我想知道如何在reactJS或react-native环境的axios post方法中设置Access-Control-Allow-Origin? 我使用了CORS附加组件，并且可以使用，但是我也想在标头中设置它，我尝试了这些方法，但是没有一个不起作用.

I want to know how set Access-Control-Allow-Origin in axios post method at reactJS or react-native environment? I use CORS Add-ons and it works but I want to set it in the header too, I try these ways but none of them does not work.

axios.defaults.headers.post['Access-Control-Allow-Origin'] = '*';

和

let axiosConfig = {
  headers: {
    'method':'POST',
    'X-Requested-With': 'XMLHttpRequest',
    'Content-Type': 'application/x-www-form-urlencoded',
    'Access-Control-Allow-Origin': '*',
  }
};

推荐答案

您需要在服务器端启用跨源请求.使用Express的方式如下所示

You need to enable cross origin request at your server end. A snippet of how you can do it using Express would be as follows

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

这将使所有请求都支持CORS.根据您的要求进行调整.

This would enable all requests to support CORS. Adapt it as per your requirements.

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