vue中解决跨域的常见方案分享(建议收藏)

import axios from 'axios'
import router from '@/router/index.js'
import store from '@/store/index.js'
// 创建一个axios实例
var instance = axios.create({ 

baseURL: "/api",
})
// 请求拦截器
instance.interceptors.request.use(function (config) { 

config.headers['E_Token'] = store.state.user.E_Token;
return config;
}, function (error) { 

// 对请求错误做些什么
return Promise.reject(error);
})
// 响应拦截
instance.interceptors.response.use(function (config) { 

if(config.data.retCode !=0){ 

// 处理后台异常
return false;
}
return config;
}, function (error) { 

return Promise.reject(error)
})
export default function (method, url, data = null) { 

method = method.toLowerCase();
if (method == 'post') { 

return instance.post(url, data)
} else if (method == 'get') { 

return instance.get(url, data)
} else if (method == 'delete') { 

return instance.delete(url, data)
} else if (method == 'put') { 

return instance.put(url, data)
} else { 

console.error('未知的method' + method)
return false
}
}

import req from '../index'
//用户注册接口
export const register =(params)=>{ 

return req("post", '/user/register', params)
}
//用户登录接口
export const login =(params)=>{ 

return req("post", '/user/login', params)
}
//Model列表及分页
export const getFormList =(params)=>{ 

return req("post", '/model/getFormList', params)
}
//查看详情
export const queryModel =(params)=>{ 

return req("get", '/model/queryModel/'+params.id,{ 
})
}
//Model删除接口
export const deleteModel =(params)=>{ 

return req("delete", '/model/deleteModel/'+params.id,{ 
})
}
//Model新增
export const insertModel =(params)=>{ 

return req("post", '/model/insertModel', params)
}

devServer: {
// 1.指定服务的ip
host: "192.168.0.128",
// 2.指定服务的端口
port: 3000,
open: true,
overlay: {
warnings: false,
errors: true
},
// 3.开发环境进行http的代理
proxy: {
// 匹配 url 路径的开头
'/api': {
// 1.路劲只要是/api开头的url都代理到下面这个网站。
// 例如：'/api/xxxx' 会代理到 https://119.20.224.137/api/xxxx
target: 'http://119.20.224.137:8201',
changeOrigin: true,
pathRewrite: { '^/api': '/api/' }
}
}
},

location / { 

root   D:/browseClient/dist;  #自己的前端项目地址
index  index.html index.htm;
}
#解决跨域
location /api { 
                                # 自定义nginx接口前缀
proxy_pass   http://127.0.0.1:3000;            # 后台api接口地址
proxy_redirect default;      
#设置主机头和客户端真实地址，以便服务器获取客户端真实IP
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;   
}

 response.setHeader("Access-Control-Allow-Origin", "*");//* or origin as u prefer
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Methods", "PUT, POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "content-type, authorization");