Unapp H5端跨域问题

报错

Access to XMLHttpRequest at 'http://www.localtest.com/api/api/v1/job/getPositionList' from origin 'http://localhost:8080' has been blocked by CORS policy: Request header field os-version is not allowed by Access-Control-Allow-Headers in preflight response.

原本请求接口

http://www.localtest.com/api/api/v1/job/getPositionList

解决方法 

在manifest.json文件中配置跨域，该方法类似vue.config.js中的devServer

 

"h5" : {
        "devServer" : {
            "disableHostCheck" : true, // 开启可以用自己的域名
            "proxy": {
              "/api": {
                "target": "http://www.localtest.com",
                "changeOrigin" : true,
                "secure" : false,
                "pathRewrite": { //匹配请求路径里面有 /api 会替换成https://www.test.com
                // 举例：/api/api/user => https://www.localtest.com/api/user
                  "^/api": ""
                }
              }
            }
        }
    }

另外

baseUrl = process.env.NODE_ENV === 'development' ? '/api' : 'https://www.localtest.com' 
然后uni.request请求的url应该是这样：
baseUrl + '/user/info' 
然后浏览器看到的请求地址应该是 http://localhost:8080/user/info