摘要：Springboot的反向代理主要是为了不引入SpringCloud Gateway而实现流量在不同应用之间的转发，并进行数据过滤或者权限添加等操作
核心代码如下
pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mitre.dsmiley.httpproxy</groupId>
<artifactId>smiley-http-proxy-servlet</artifactId>
<version>1.12.1</version>
</dependency>
</dependencies>
application.yml
proxy:
enabled: true
show-log: true
proxy-attributes:
- servletUrl: /baidu/*
targetUrl: http://apis.juhe.cn
ProxyProperties
该文件用作与
application.yml文件的配置关联起来
@ConfigurationProperties(prefix = ProxyProperties.PREFIX, ignoreUnknownFields = false)
public class ProxyProperties {
public static final String PREFIX = "proxy";
public static final String CONDITIONAL = PREFIX + "." + "enabled";
/** 是否开启 */
private Boolean enabled = Boolean.FALSE;
/** 是否打印日志 */
private Boolean showLog = Boolean.FALSE;
/** 代理的属性 */
private List<ProxyAttribute> proxyAttributes;
public Boolean getEnabled() {
return enabled;
}
public void setEnabled(Boolean enabled) {
this.enabled = enabled;
}
public Boolean getShowLog() {
return showLog;
}
public void setShowLog(Boolean showLog) {
this.showLog = showLog;
}
public List<ProxyAttribute> getProxyAttributes() {
return proxyAttributes;
}
public void setProxyAttributes(List<ProxyAttribute> proxyAttributes) {
this.proxyAttributes = proxyAttributes;
}
/**
* 代理的属性配置
*/
public static class ProxyAttribute{
/** 路由路径 */
private String servletUrl;
/** 实际转发的目的地 */
private String targetUrl;
public String getServletUrl() {
return servletUrl;
}
public void setServletUrl(String servletUrl) {
this.servletUrl = servletUrl;
}
public String getTargetUrl() {
return targetUrl;
}
public void setTargetUrl(String targetUrl) {
this.targetUrl = targetUrl;
}
}
}
ProxyAutoConfiguration
该类是一个自动配置类，后面可以考虑写一个类似
Springboot自动装配的jar包；该类主要作用是把Servlet注入到Spring的管理中，
@Configuration
@EnableConfigurationProperties(value = ProxyProperties.class)
@ConditionalOnProperty(value = ProxyProperties.CONDITIONAL, havingValue = "true")
public class ProxyAutoConfiguration implements ServletContextInitializer {
@Autowired
private ProxyProperties proxyProperties;
@Override
public void onStartup(ServletContext servletContext) {
if(!Boolean.TRUE.equals(proxyProperties.getEnabled()) || CollectionUtils.isEmpty(proxyProperties.getProxyAttributes())){
return;
}
for (int i = 0; i < proxyProperties.getProxyAttributes().size(); i++) {
ProxyProperties.ProxyAttribute proxyAttribute = proxyProperties.getProxyAttributes().get(i);
ServletRegistration initServlet = servletContext.addServlet(proxyAttribute.getServletUrl(), ProxyServlet.class);
initServlet.addMapping(proxyAttribute.getServletUrl());
initServlet.setInitParameter(ProxyServlet.P_TARGET_URI, proxyAttribute.getTargetUrl());
initServlet.setInitParameter(ProxyServlet.P_LOG, proxyProperties.getShowLog().toString());
initServlet.setInitParameter(ProxyServlet.P_PRESERVECOOKIES, Boolean.TRUE.toString());
}
}
}
