一文详解SpringBoot响应压缩功能的配置与优化

server:
  compression:
    enabled: true
    min-response-size: 1KB    # 压缩触发阈值
    mime-types: 
      - application/json
      - text/html
      - text/css
    excluded-user-agents: IE8  # 排除旧版浏览器
  servlet:
    context-path: /api
  tomcat:
    max-http-post-size: 10MB   # 连接器专属配置

@Configuration
public class CompressionConfig {
    
    @Bean
    public ConfigurableServletWebServerFactory tomcatCustomizer() {
        TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();
        factory.addConnectorCustomizers(connector -> {
            connector.setProperty("compression", "on");
            connector.setProperty("compressibleMimeType", "application/json,text/html");
            connector.setProperty("compressionMinSize", "1024"); // 覆盖YAML配置
        });
        return factory;
    }
}

function adaptiveThreshold(rtt) {
  return rtt > 300 ? 512 : 2048; // 根据网络延迟调整
}

# 验证响应头
curl -I -H "Accept-Encoding: gzip" http://localhost:8080/api/data

# 体积对比测试
RAW_SIZE=$(curl -s http://localhost:8080/api/data | wc -c)
GZIP_SIZE=$(curl -s -H "Accept-Encoding: gzip" http://localhost:8080/api/data | wc -c)
echo "压缩率: $((100 - GZIP_SIZE*100/RAW_SIZE))%"

@SpringBootTest
class CompressionTest {
    
    @Autowired
    private MockMvc mockMvc;

    @Test
    void testGzipCompression() throws Exception {
        mockMvc.perform(get("/api/data")
                .header("Accept-Encoding", "gzip"))
            .andExpect(header().exists("Content-Encoding"))
            .andExpect(header().string("Content-Encoding", "gzip"));
    }
}

server:
  compression:
    excluded-content-types: 
      - text/plain+secret
      - application/jwt+json

server:
  http:
    headers:
      content-security-policy: "default-src 'self'"
      x-content-type-options: "nosniff"
      x-xss-protection: "1; mode=block"

@Endpoint(id="compression")
public class CompressionMetrics {
    
    @ReadOperation
    public Map<String, Object> metrics() {
        return Map.of(
            "compression_ratio", calculateRatio(),
            "cpu_overhead", getCpuUsage(),
            "throughput", getRequestsPerSecond()
        );
    }
}

# Nginx前置压缩配置
gzip on;
gzip_min_length 1k;
brotli on;
brotli_min_length 512;
brotli_types application/json text/html;

def should_compress(request):
    client = request.headers.get('User-Agent')
    if 'Mobile' in client:
        return request.content_length > 512
    return request.content_length > 1024