20240120

1 nginx 跨域代理

location /proxy/gateway/ {
    proxy_pass http://10.100.12.34/gateway/;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
    add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
    add_header 'Access-Control-Max-Age' 1728000;
    if ($request_method = 'OPTIONS') {
        return 204;
    }
}

2 Java配置跨域过滤器

public class CrossFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // do nothing
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, Cache-Control, Content-Type,Authorization");
        response.setHeader("Access-Control-Max-Age", "600");

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        if (request.getMethod().equals("OPTIONS")) {
            response.setStatus(204);
            return;
        }

        filterChain.doFilter(servletRequest, servletResponse);

        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
    }

    @Override
    public void destroy() {
        // do nothing
    }
}

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {


    /**
     * 注册跨域过滤器
     *
     * @return
     */
    @Bean("registerCrossFilter")
    public FilterRegistrationBean registerCrossFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new CrossFilter());
        registration.addUrlPatterns("/*");
        registration.setOrder(1);

        return registration;
    }


}

3 spring boot项目使用restTemplate转发

@RestController
@RequestMapping("/agency")
public class AgencyController {

    @Autowired
    RestTemplate restTemplate;

    @Value(value = "${hik.cameras}")
    String hikCameras;

    @Value(value = "${hik.preview}")
    String preView;

    @PostMapping("/cameras")
    public String getUserDomain(@RequestBody(required = false) PageReq req) {
        //请求头
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        //请求体
        HttpEntity<PageReq> request = new HttpEntity<PageReq>(req, headers);
        return restTemplate.exchange(hikCameras, HttpMethod.POST, request, String.class).getBody();
    }


    @PostMapping("/preview")
    public String getUserDomain(@RequestBody(required = false) PreviewReq req) {
        //请求头
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        //请求体
        HttpEntity<PreviewReq> request = new HttpEntity<PreviewReq>(req, headers);
        return restTemplate.exchange(preView, HttpMethod.POST, request, String.class).getBody();
    }
}

RestTemplateConfig

@Configuration
public class RestTemplateConfig {
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

yml

server:
  port: 8081
  servlet:
    context-path: /hhl-basic
hik:
  cameras: http://xxxxxxxx/gateway/hikvision/cameras
  preview: http://xxxxxxxx/gateway/hikvision/cameras/preview

maven项目打包build配置

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot.version}</version><!-- 对应springboot版本-->
                <configuration>
                    <mainClass>com.dataojo.huangheloubasic.HuangHeLouBasicApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>