PHP后台配置

PHP后台得配置几乎是所有后台中最为简单的,遵循如下步骤即可:

• 第一步:配置Php 后台允许跨域

<?php
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
//主要为跨域CORS配置的两大基本信息,Origin和headers

• 第二步:配置Apache web服务器跨域(httpd.conf中)

原始代码

<Directory>
    AllowOverride none
    Require all denied
</Directory>

改为以下代码

<Directory>
    Options FollowSymLinks
    AllowOverride none
    Order deny,allow
    Allow from all
</Directory>

Node.js后台配置(express框架)

Node.js的后台也相对来说比较简单就可以进行配置。只需用express如下配置:

const express = require('express');

const app = express();

app.all('*', function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    res.header("X-Powered-By", ' 3.2.1')
    //这段仅仅为了方便返回json而已
    res.header("Content-Type", "application/json;charset=utf-8");
    if(req.method == 'OPTIONS') {
        //让options请求快速返回
        res.sendStatus(200);
    } else {
        next();
    }
});

JAVA后台配置

• 第一步:获取依赖jar包

上古项目可以
下载 cors-filter-1.7.jar, java-property-utils-1.9.jar

这两个库文件放到lib目录下。(放到对应项目的webcontent/WEB-INF/lib/下)

• 第二步:如果项目用了Maven构建的,请添加如下依赖到pom.xml中:(非maven请忽视)

<dependency>
    <groupId>com.thetransactioncompany</groupId>
    <artifactId>cors-filter</artifactId>
    <version>[ version ]</version>
</dependency>

其中版本应该是最新的稳定版本,CORS过滤器

(非maven请忽视)

• 第三步:添加CORS配置到项目的Web.xml中( App/WEB-INF/web.xml)

<!-- 跨域配置-->    
<filter>
        <!-- The CORS filter with parameters -->
        <filter-name>CORS</filter-name>
        <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
        
        <!-- Note: All parameters are options, if omitted the CORS 
             Filter will fall back to the respective default values.
          -->
        <init-param>
            <param-name>cors.allowGenericHttpRequests</param-name>
            <param-value>true</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.allowOrigin</param-name>
            <param-value>*</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.allowSubdomains</param-name>
            <param-value>false</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.supportedMethods</param-name>
            <param-value>GET, HEAD, POST, OPTIONS</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.supportedHeaders</param-name>
            <param-value>Accept, Origin, X-Requested-With, Content-Type, Last-Modified</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.exposedHeaders</param-name>
            <!--这里可以添加一些自己的暴露Headers   -->
            <param-value>X-Test-1, X-Test-2</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.supportsCredentials</param-name>
            <param-value>true</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.maxAge</param-name>
            <param-value>3600</param-value>
        </init-param>

    </filter>

    <filter-mapping>
        <!-- CORS Filter mapping -->
        <filter-name>CORS</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

请注意,以上配置文件请放到web.xml的前面,作为第一个filter存在(可以有多个filter的)

• 第四步:可能的安全模块配置错误(注意，某些框架中-譬如公司私人框架，有安全模块（如shiro）的，有时候这些安全模块配置会影响跨域配置，这时候可以先尝试关闭它们)

JAVA Spring Boot配置

仅列举简单的全局配置

@Configuration
public class CorsConfig {

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        
        // 可以自行筛选
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        
        source.registerCorsConfiguration("/**", buildConfig());
        
        return new CorsFilter(source);  
    }
}

文章完整来源掘金：https://segmentfault.com/a/1190000012469713

Q.E.D.