5.0版本 发布 重构下载方法 修复pdf 占用demo文件夹

server/src/main/java/cn/keking/service/impl/PdfFilePreviewImpl.java

@@ -60,6 +60,9 @@ public class PdfFilePreviewImpl implements FilePreview {
         String originFilePath;  //原始文件路径
         String cacheName = pdfName+officePreviewType;
         String filePassword = fileAttribute.getFilePassword();  // 获取密码
+        if("demo.pdf".equals(pdfName)){
+            return otherFilePreview.notSupportedFile(model, fileAttribute, "不能使用该文件名，请更换其他文件名在进行转换");
+        }
         // 查询转换状态
         String statusResult = officefilepreviewimpl.checkAndHandleConvertStatus(model, pdfName, cacheName, fileAttribute);
         if (statusResult != null) {

server/src/main/java/cn/keking/utils/DownloadUtils.java

@@ -3,30 +3,11 @@ package cn.keking.utils;
 import cn.keking.config.ConfigConstants;
 import cn.keking.model.FileAttribute;
 import cn.keking.model.ReturnResponse;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.type.TypeFactory;
 import io.mola.galimatias.GalimatiasParseException;
 import org.apache.commons.io.FileUtils;
-import org.apache.hc.client5.http.ConnectionKeepAliveStrategy;
-import org.apache.hc.client5.http.config.ConnectionConfig;
-import org.apache.hc.client5.http.config.RequestConfig;
 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
-import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
-import org.apache.hc.client5.http.impl.classic.HttpClients;
-import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
-import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
-import org.apache.hc.core5.http.HttpResponse;
-import org.apache.hc.core5.http.protocol.HttpContext;
-import org.apache.hc.core5.util.TimeValue;
-import org.apache.hc.core5.util.Timeout;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.http.HttpMethod;
-import org.springframework.http.MediaType;
-import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
-import org.springframework.util.StringUtils;
-import org.springframework.web.client.RequestCallback;
-import org.springframework.web.client.RestTemplate;
 
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -34,10 +15,7 @@ import java.io.IOException;
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
-import java.util.Arrays;
-import java.util.Map;
 import java.util.UUID;
-import java.util.concurrent.TimeUnit;
 
 import static cn.keking.utils.KkFileUtils.*;
 
@@ -52,56 +30,6 @@ public class DownloadUtils {
     private static final String URL_PARAM_FTP_PASSWORD = "ftp.password";
     private static final String URL_PARAM_FTP_CONTROL_ENCODING = "ftp.control.encoding";
     private static final String URL_PARAM_FTP_PORT = "ftp.control.port";
-    private static final ObjectMapper mapper = new ObjectMapper();
-
-    // 使用静态单例的HttpClient和RestTemplate，实现连接复用
-    private static volatile CloseableHttpClient httpClient;
-    private static volatile RestTemplate restTemplate;
-
-    // 获取单例HttpClient（线程安全）
-    private static CloseableHttpClient getHttpClient() throws Exception {
-        if (httpClient == null) {
-            synchronized (DownloadUtils.class) {
-                if (httpClient == null) {
-                    httpClient = createConfiguredHttpClient();
-                    logger.info("HttpClient初始化完成，已启用连接池和超时配置");
-                }
-            }
-        }
-        return httpClient;
-    }
-
-    // 获取单例RestTemplate
-    private static RestTemplate getRestTemplate() throws Exception {
-        if (restTemplate == null) {
-            synchronized (DownloadUtils.class) {
-                if (restTemplate == null) {
-                    HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
-                    factory.setHttpClient(getHttpClient());
-
-                    // 设置连接和读取超时（毫秒）
-                    factory.setConnectTimeout(10000);      // 10秒连接超时
-                    factory.setReadTimeout(30000);         // 30秒读取超时
-                    factory.setConnectionRequestTimeout(5000); // 5秒获取连接超时
-
-                    restTemplate = new RestTemplate(factory);
-                }
-            }
-        }
-        return restTemplate;
-    }
-
-    // 应用关闭时清理资源
-    public static void shutdown() {
-        if (httpClient != null) {
-            try {
-                httpClient.close();
-                logger.info("HttpClient已关闭");
-            } catch (IOException e) {
-                logger.warn("关闭HttpClient失败", e);
-            }
-        }
-    }
 
     /**
      * @param fileAttribute fileAttribute
@@ -149,79 +77,31 @@ public class DownloadUtils {
             if (!fileAttribute.getSkipDownLoad()) {
                 if (isHttpUrl(url)) {
                     File realFile = new File(realPath);
-
-                    // 使用单例的RestTemplate，复用连接池
-                    RestTemplate template = getRestTemplate();
+                    CloseableHttpClient httpClient = HttpRequestUtils.createConfiguredHttpClient();
                     String finalUrlStr = urlStr;
-                    RequestCallback requestCallback = request -> {
-                        request.getHeaders().setAccept(Arrays.asList(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL));
-                        WebUtils.applyBasicAuthHeaders(request.getHeaders(), finalUrlStr);
-                        String proxyAuthorization = fileAttribute.getKkProxyAuthorization();
-                        if(StringUtils.hasText(proxyAuthorization)){
-                            Map<String, String> proxyAuthorizationMap = mapper.readValue(
-                                    proxyAuthorization,
-                                    TypeFactory.defaultInstance().constructMapType(Map.class, String.class, String.class)
-                            );
-                            proxyAuthorizationMap.forEach((key, value) -> request.getHeaders().set(key, value));
-                        }
-                    };
-                    try {
-                        final boolean[] hasError = {false};
-                        String finalUrlStr1 = urlStr;
-                        template.execute(url.toURI(), HttpMethod.GET, requestCallback, fileResponse -> {
-                            try {
+                    HttpRequestUtils.executeHttpRequest(url, httpClient, fileAttribute, responseWrapper -> {
                         // 获取响应头中的Content-Type
-                                String contentType = WebUtils.headersType(fileResponse);
+                        String contentType = responseWrapper.getContentType();
 
                         // 如果是Office/设计文件，需要校验MIME类型
-                                if ( WebUtils.isMimeCheckRequired(fileSuffix)) {
-                                    if (! WebUtils.isValidMimeType(contentType, fileSuffix)) {
+                        if (WebUtils.isMimeCheckRequired(fileSuffix)) {
+                            if (!WebUtils.isValidMimeType(contentType, fileSuffix)) {
                                 logger.error("文件类型错误，期望二进制文件但接收到文本类型，url: {}, Content-Type: {}",
-                                                finalUrlStr1, contentType);
-                                        hasError[0] = true;
-                                        // 重要：关闭响应流，不读取后续数据
-                                        fileResponse.close();
-                                        return null;
+                                        finalUrlStr, contentType);
+                                responseWrapper.setHasError(true);
+                                return;
                             }
                         }
 
                         // 保存文件
-                                FileUtils.copyToFile(fileResponse.getBody(), realFile);
-                            } catch (Exception e) {
-                                logger.error("处理文件响应时出错", e);
-                                hasError[0] = true;
-                            }
-                            return null;
+                        FileUtils.copyToFile(responseWrapper.getInputStream(), realFile);
                     });
-
-                        // 如果下载过程中出现错误
-                        if (hasError[0]) {
-                            response.setCode(1);
-                            response.setContent(null);
-                            response.setMsg("文件类型校验失败");
-                            return response;
-                        }
-                    }  catch (Exception e) {
-                        // 如果是SSL证书错误，给出建议
-                        if (e.getMessage() != null &&
-                                (e.getMessage().contains("SSL") ||
-                                        e.getMessage().contains("证书") ||
-                                        e.getMessage().contains("certificate")) &&
-                                !ConfigConstants.isIgnoreSSL()) {
-                            logger.warn("SSL证书验证失败，建议启用SSL忽略功能或检查证书");
-                        }
-                        response.setCode(1);
-                        response.setContent(null);
-                        response.setMsg("下载失败:" + e.getMessage());
-                        return response;
-                    }
-                    // 不再需要finally块中关闭HttpClient，因为复用
                 } else if (isFtpUrl(url)) {
                     String ftpUsername = WebUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_USERNAME);
                     String ftpPassword = WebUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_PASSWORD);
                     String ftpControlEncoding = WebUtils.getUrlParameterReg(fileAttribute.getUrl(), URL_PARAM_FTP_CONTROL_ENCODING);
                     String ftpport = WebUtils.getUrlParameterReg(realPath, URL_PARAM_FTP_PORT);
-                    FtpUtils.download(fileAttribute.getUrl(),ftpport, realPath, ftpUsername, ftpPassword, ftpControlEncoding);
+                    FtpUtils.download(fileAttribute.getUrl(), ftpport, realPath, ftpUsername, ftpPassword, ftpControlEncoding);
                 } else if (isFileUrl(url)) { // 添加对file协议的支持
                     handleFileProtocol(url, realPath);
                 } else {
@@ -233,7 +113,7 @@ public class DownloadUtils {
             response.setMsg(fileName);
             return response;
         } catch (IOException | GalimatiasParseException e) {
-            logger.error("文件下载失败，url：{}", urlStr, e);
+            logger.error("文件下载失败，url：{}", urlStr);
             response.setCode(1);
             response.setContent(null);
             if (e instanceof FileNotFoundException) {
@@ -243,81 +123,10 @@ public class DownloadUtils {
             }
             return response;
         } catch (Exception e) {
-            logger.error("下载过程发生未知异常", e);
-            response.setCode(1);
-            response.setContent(null);
-            response.setMsg("下载失败:" + e.getMessage());
-            return response;
+            throw new RuntimeException(e);
         }
     }
 
-    /**
-     * 创建根据配置定制的HttpClient（连接池版本）
-     */
-    private static CloseableHttpClient createConfiguredHttpClient() throws Exception {
-        // 使用新的Builder API创建连接池管理器
-        PoolingHttpClientConnectionManager connectionManager = PoolingHttpClientConnectionManagerBuilder.create()
-                .setMaxConnTotal(100)                     // 最大连接数
-                .setMaxConnPerRoute(20)                   // 每个路由最大连接数
-                .setDefaultConnectionConfig(ConnectionConfig.custom()
-                        .setConnectTimeout(Timeout.ofSeconds(10))      // 连接超时10秒
-                        .setSocketTimeout(Timeout.ofSeconds(30))       // Socket超时30秒
-                        .setTimeToLive(TimeValue.ofMinutes(10))        // 连接存活时间10分钟
-                        .build())
-                .build();
-
-        // 创建请求配置
-        RequestConfig requestConfig = RequestConfig.custom()
-                .setResponseTimeout(Timeout.ofSeconds(30))             // 响应超时30秒
-                .setConnectionRequestTimeout(Timeout.ofSeconds(5))     // 获取连接超时5秒
-                .build();
-
-        // 创建HttpClientBuilder
-        HttpClientBuilder builder = HttpClients.custom()
-                .setConnectionManager(connectionManager)
-                .setDefaultRequestConfig(requestConfig);
-
-        // 配置Keep-Alive策略
-        ConnectionKeepAliveStrategy keepAliveStrategy = (response, context) -> {
-            // 默认保持30秒
-            return TimeValue.ofSeconds(30);
-        };
-        builder.setKeepAliveStrategy(keepAliveStrategy);
-
-        // 配置SSL
-        if (ConfigConstants.isIgnoreSSL()) {
-            logger.debug("创建忽略SSL验证的HttpClient");
-            // 如果SslUtils支持HttpClient5，则使用它来创建client
-            // 否则，我们需要在这里配置忽略SSL
-            return createHttpClientWithConfig(builder);
-        } else {
-            logger.debug("创建标准HttpClient");
-        }
-
-        // 配置重定向
-        if (!ConfigConstants.isEnableRedirect()) {
-            logger.debug("禁用HttpClient重定向");
-            builder.disableRedirectHandling();
-        }
-
-        return builder.build();
-    }
-
-    /**
-     * 创建配置了忽略SSL的HttpClient
-     */
-    private static CloseableHttpClient createHttpClientWithConfig(HttpClientBuilder builder) throws Exception {
-        // 如果SslUtils支持直接配置builder，则：
-        // SslUtils.configureIgnoreSsl(builder);
-        // return builder.build();
-
-        // 否则，使用SslUtils创建client
-        CloseableHttpClient sslIgnoredClient = SslUtils.createHttpClientIgnoreSsl();
-
-        logger.warn("SslUtils.createHttpClientIgnoreSsl()可能没有连接池配置，建议修改SslUtils以支持builder配置");
-        return sslIgnoredClient;
-    }
-
     // 处理file协议的文件下载
     private static void handleFileProtocol(URL url, String targetPath) throws IOException {
         File sourceFile = new File(url.getPath());

server/src/main/java/cn/keking/utils/HttpRequestUtils.java

@@ -0,0 +1,355 @@
+package cn.keking.utils;
+
+import cn.keking.config.ConfigConstants;
+import cn.keking.model.FileAttribute;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+import org.apache.hc.client5.http.config.ConnectionConfig;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
+import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
+import org.apache.hc.client5.http.ssl.DefaultClientTlsStrategy;
+import org.apache.hc.client5.http.ssl.NoopHostnameVerifier;
+import org.apache.hc.core5.http.io.SocketConfig;
+import org.apache.hc.core5.pool.PoolConcurrencyPolicy;
+import org.apache.hc.core5.pool.PoolReusePolicy;
+import org.apache.hc.core5.util.TimeValue;
+import org.apache.hc.core5.util.Timeout;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.util.StringUtils;
+import org.springframework.web.client.RequestCallback;
+import org.springframework.web.client.RestTemplate;
+
+import javax.net.ssl.SSLContext;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * HTTP请求工具类，统一处理HTTP请求逻辑
+ * 优化版本：支持连接复用，减少开销
+ */
+public class HttpRequestUtils {
+
+    private static final Logger logger = LoggerFactory.getLogger(HttpRequestUtils.class);
+    private static final ObjectMapper mapper = new ObjectMapper();
+
+    // 连接池管理器（静态变量，全局共享）
+    private static volatile PoolingHttpClientConnectionManager connectionManager;
+
+    // 用于缓存不同配置的HttpClient实例
+    private static final Map<String, CloseableHttpClient> httpClientCache = new ConcurrentHashMap<>();
+
+    // 用于缓存不同配置的RestTemplate实例
+    private static final Map<String, RestTemplate> restTemplateCache = new ConcurrentHashMap<>();
+
+    // 默认连接池配置
+    private static final int DEFAULT_MAX_TOTAL = 200;           // 最大连接数
+    private static final int DEFAULT_MAX_PER_ROUTE = 50;        // 每个路由最大连接数
+
+    /**
+     * 初始化连接池管理器（懒加载）
+     */
+    private static PoolingHttpClientConnectionManager getConnectionManager() throws Exception {
+        if (connectionManager == null) {
+            synchronized (HttpRequestUtils.class) {
+                if (connectionManager == null) {
+                    // 创建连接池管理器
+                    PoolingHttpClientConnectionManagerBuilder builder = PoolingHttpClientConnectionManagerBuilder.create();
+
+                    // 如果配置忽略SSL，使用自定义TLS策略
+                    if (ConfigConstants.isIgnoreSSL()) {
+                        SSLContext sslContext = SslUtils.createIgnoreVerifySSL();
+                        DefaultClientTlsStrategy tlsStrategy = new DefaultClientTlsStrategy(
+                                sslContext, NoopHostnameVerifier.INSTANCE);
+                        builder.setTlsSocketStrategy(tlsStrategy);
+                    }
+
+                    // 设置连接池参数
+                    builder.setPoolConcurrencyPolicy(PoolConcurrencyPolicy.LAX)
+                            .setConnPoolPolicy(PoolReusePolicy.LIFO)
+                            .setMaxConnTotal(DEFAULT_MAX_TOTAL)
+                            .setMaxConnPerRoute(DEFAULT_MAX_PER_ROUTE);
+
+                    // 设置Socket配置
+                    SocketConfig socketConfig = SocketConfig.custom()
+                            .setTcpNoDelay(true)
+                            .setSoKeepAlive(true)
+                            .setSoReuseAddress(true)
+                            .setSoTimeout(Timeout.ofSeconds(30))
+                            .build();
+                    builder.setDefaultSocketConfig(socketConfig);
+
+                    // 设置连接配置
+                    ConnectionConfig connectionConfig = ConnectionConfig.custom()
+                            .setConnectTimeout(Timeout.ofSeconds(10))
+                            .setSocketTimeout(Timeout.ofSeconds(30))
+                            .setTimeToLive(TimeValue.ofMinutes(5))
+                            .build();
+                    builder.setDefaultConnectionConfig(connectionConfig);
+
+                    connectionManager = builder.build();
+
+                    // 启动空闲连接清理线程
+                    startIdleConnectionMonitor();
+
+                    logger.info("HTTP连接池管理器初始化完成，最大连接数：{}，每个路由最大连接数：{}",
+                            DEFAULT_MAX_TOTAL, DEFAULT_MAX_PER_ROUTE);
+                }
+            }
+        }
+        return connectionManager;
+    }
+
+    /**
+     * 启动空闲连接监控线程
+     */
+    private static void startIdleConnectionMonitor() {
+        Thread monitorThread = new Thread(() -> {
+            try {
+                while (!Thread.currentThread().isInterrupted()) {
+                    synchronized (HttpRequestUtils.class) {
+                        Thread.sleep(30000); // 每30秒检查一次
+                        if (connectionManager != null) {
+                            // 关闭过期的连接
+                            connectionManager.closeExpired();
+                            // 关闭空闲超过30秒的连接
+                            connectionManager.closeIdle(TimeValue.ofSeconds(30));
+
+                            // 可选：打印连接池状态
+                            if (logger.isDebugEnabled()) {
+                                logger.debug("连接池状态：最大连接数={}, 每个路由最大连接数={}",
+                                        connectionManager.getMaxTotal(),
+                                        connectionManager.getDefaultMaxPerRoute());
+                            }
+                        }
+                    }
+                }
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                logger.info("连接池监控线程被中断");
+            } catch (Exception e) {
+                logger.error("连接池监控异常", e);
+            }
+        });
+
+        monitorThread.setDaemon(true);
+        monitorThread.setName("http-connection-monitor");
+        monitorThread.start();
+    }
+
+    /**
+     * 创建根据配置定制的HttpClient（支持复用）
+     */
+    public static CloseableHttpClient createConfiguredHttpClient() throws Exception {
+        String cacheKey = buildHttpClientCacheKey();
+
+        // 尝试从缓存获取
+        CloseableHttpClient cachedClient = httpClientCache.get(cacheKey);
+        if (cachedClient != null) {
+            // HttpClient 5.x 没有 isClosed() 方法，我们需要通过其他方式判断
+            // 暂时假设缓存的客户端都是可用的，如果有问题会在使用时报错
+            return cachedClient;
+        }
+
+        // 创建新的HttpClient
+        synchronized (httpClientCache) {
+            // 双重检查
+            cachedClient = httpClientCache.get(cacheKey);
+            if (cachedClient != null) {
+                return cachedClient;
+            }
+
+            // 构建HttpClientBuilder
+            HttpClientBuilder httpClientBuilder = HttpClients.custom()
+                    .setConnectionManager(getConnectionManager())
+                    .setConnectionManagerShared(true); // 共享连接管理器
+
+            // 使用SslUtils配置HttpClientBuilder
+            CloseableHttpClient httpClient = SslUtils.configureHttpClientBuilder(
+                    httpClientBuilder,
+                    ConfigConstants.isIgnoreSSL(),
+                    ConfigConstants.isEnableRedirect()
+            ).build();
+
+            // 缓存HttpClient
+            httpClientCache.put(cacheKey, httpClient);
+            logger.debug("创建并缓存新的HttpClient实例，缓存键：{}", cacheKey);
+
+            return httpClient;
+        }
+    }
+
+    /**
+     * 构建HttpClient缓存键
+     */
+    private static String buildHttpClientCacheKey() {
+        return String.format("ignoreSSL_%s_enableRedirect_%s",
+                ConfigConstants.isIgnoreSSL(),
+                ConfigConstants.isEnableRedirect());
+    }
+
+    /**
+     * 获取缓存的RestTemplate（减少对象创建）
+     */
+    private static RestTemplate getCachedRestTemplate(CloseableHttpClient httpClient) {
+        String cacheKey = "restTemplate_" + System.identityHashCode(httpClient);
+
+        return restTemplateCache.computeIfAbsent(cacheKey, key -> {
+            HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
+            factory.setHttpClient(httpClient);
+
+            // 设置连接超时和读取超时
+            factory.setConnectTimeout(30000);
+            factory.setReadTimeout(30000);
+
+            RestTemplate restTemplate = new RestTemplate();
+            restTemplate.setRequestFactory(factory);
+
+            logger.debug("创建并缓存新的RestTemplate实例，缓存键：{}", cacheKey);
+            return restTemplate;
+        });
+    }
+
+    /**
+     * 执行HTTP请求（使用连接池）
+     */
+    public static void executeHttpRequest(java.net.URL url, CloseableHttpClient httpClient,
+                                          FileAttribute fileAttribute, FileResponseHandler handler) throws Exception {
+        // 获取缓存的RestTemplate
+        RestTemplate restTemplate = getCachedRestTemplate(httpClient);
+
+        String finalUrlStr = url.toString();
+        RequestCallback requestCallback = createRequestCallback(finalUrlStr, fileAttribute);
+
+        try {
+            restTemplate.execute(url.toURI(), HttpMethod.GET, requestCallback, response -> {
+                FileResponseWrapper wrapper = new FileResponseWrapper();
+                wrapper.setInputStream(response.getBody());
+                wrapper.setContentType(WebUtils.headersType(response));
+
+                try {
+                    handler.handleResponse(wrapper);
+                } catch (Exception e) {
+                    logger.error("处理文件响应时出错", e);
+                    throw new RuntimeException(e);
+                }
+                return null;
+            });
+        } catch (Exception e) {
+            // 如果是SSL证书错误，给出建议
+            if (e.getMessage() != null &&
+                    (e.getMessage().contains("SSL") ||
+                            e.getMessage().contains("证书") ||
+                            e.getMessage().contains("certificate")) &&
+                    !ConfigConstants.isIgnoreSSL()) {
+                logger.warn("SSL证书验证失败，建议启用SSL忽略功能或检查证书");
+            }
+            throw e;
+        }
+        // 注意：不再关闭HttpClient，由连接池管理
+    }
+
+    /**
+     * 创建请求回调
+     */
+    private static RequestCallback createRequestCallback(String finalUrlStr, FileAttribute fileAttribute) {
+        return request -> {
+            request.getHeaders().setAccept(Arrays.asList(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL));
+            WebUtils.applyBasicAuthHeaders(request.getHeaders(), finalUrlStr);
+
+            // 添加Keep-Alive头
+            request.getHeaders().set("Connection", "keep-alive");
+            request.getHeaders().set("Keep-Alive", "timeout=60");
+
+            String proxyAuthorization = fileAttribute.getKkProxyAuthorization();
+            if (StringUtils.hasText(proxyAuthorization)) {
+                Map<String, String> proxyAuthorizationMap = mapper.readValue(
+                        proxyAuthorization,
+                        TypeFactory.defaultInstance().constructMapType(Map.class, String.class, String.class)
+                );
+                proxyAuthorizationMap.forEach((key, value) -> request.getHeaders().set(key, value));
+            }
+        };
+    }
+
+    /**
+     * 清理资源（在应用关闭时调用）
+     */
+    public static void shutdown() {
+        logger.info("开始清理HTTP连接池资源...");
+
+        // 关闭所有缓存的HttpClient
+        httpClientCache.values().forEach(client -> {
+            try {
+                client.close();
+            } catch (Exception e) {
+                logger.warn("关闭HttpClient失败", e);
+            }
+        });
+        httpClientCache.clear();
+
+        // 关闭连接池管理器
+        if (connectionManager != null) {
+            try {
+                connectionManager.close();
+                logger.info("HTTP连接池管理器已关闭");
+            } catch (Exception e) {
+                logger.warn("关闭连接池管理器失败", e);
+            }
+            connectionManager = null;
+        }
+
+        // 清空RestTemplate缓存
+        restTemplateCache.clear();
+
+        logger.info("HTTP连接池资源清理完成");
+    }
+
+    /**
+     * 文件响应处理器接口
+     */
+    public interface FileResponseHandler {
+        void handleResponse(FileResponseWrapper responseWrapper) throws Exception;
+    }
+
+    /**
+     * 文件响应包装器
+     */
+    public static class FileResponseWrapper {
+        private InputStream inputStream;
+        private String contentType;
+        private boolean hasError;
+
+        public InputStream getInputStream() {
+            return inputStream;
+        }
+
+        public void setInputStream(InputStream inputStream) {
+            this.inputStream = inputStream;
+        }
+
+        public String getContentType() {
+            return contentType;
+        }
+
+        public void setContentType(String contentType) {
+            this.contentType = contentType;
+        }
+
+        public boolean isHasError() {
+            return hasError;
+        }
+
+        public void setHasError(boolean hasError) {
+            this.hasError = hasError;
+        }
+    }
+}

server/src/main/java/cn/keking/utils/SslUtils.java

@@ -80,8 +80,9 @@ public class SslUtils {
 
     /**
      * 创建忽略SSL验证的SSLContext
+     * 修改为public访问权限
      */
-    private static SSLContext createIgnoreVerifySSL() throws Exception {
+    public static SSLContext createIgnoreVerifySSL() throws Exception {
         // 使用TLSv1.2或TLSv1.3
         SSLContext sc = SSLContext.getInstance("TLSv1.2");
 

server/src/main/java/cn/keking/web/controller/OnlinePreviewController.java

@@ -7,21 +7,12 @@ import cn.keking.service.FilePreview;
 import cn.keking.service.FilePreviewFactory;
 import cn.keking.service.cache.CacheService;
 import cn.keking.service.impl.OtherFilePreviewImpl;
-import cn.keking.utils.FtpUtils;
-import cn.keking.utils.KkFileUtils;
-import cn.keking.utils.SslUtils;
-import cn.keking.utils.WebUtils;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.type.TypeFactory;
+import cn.keking.utils.*;
 import fr.opensagres.xdocreport.core.io.IOUtils;
 import org.apache.commons.codec.binary.Base64;
 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
-import org.apache.hc.client5.http.impl.classic.HttpClients;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.http.HttpMethod;
-import org.springframework.http.MediaType;
-import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.util.ObjectUtils;
@@ -29,8 +20,6 @@ import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.ResponseBody;
-import org.springframework.web.client.RequestCallback;
-import org.springframework.web.client.RestTemplate;
 
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
@@ -39,7 +28,6 @@ import java.io.InputStream;
 import java.net.URL;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Map;
 
 import static cn.keking.service.FilePreview.PICTURE_FILE_PREVIEW_PAGE;
 import static cn.keking.utils.KkFileUtils.isFtpUrl;
@@ -64,7 +52,6 @@ public class OnlinePreviewController {
     private final CacheService cacheService;
     private final FileHandlerService fileHandlerService;
     private final OtherFilePreviewImpl otherFilePreview;
-    private static final ObjectMapper mapper = new ObjectMapper();
 
     public OnlinePreviewController(FilePreviewFactory filePreviewFactory, FileHandlerService fileHandlerService, CacheService cacheService, OtherFilePreviewImpl otherFilePreview) {
         this.previewFactory = filePreviewFactory;
@@ -189,50 +176,9 @@ public class OnlinePreviewController {
         InputStream inputStream = null;
         logger.info("读取跨域pdf文件url：{}", urlPath);
         if (!isFtpUrl(url)) {
-            // 根据配置创建HttpClient
-            CloseableHttpClient httpClient = createConfiguredHttpClient();
+            CloseableHttpClient httpClient = HttpRequestUtils.createConfiguredHttpClient();
 
-            HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
-            factory.setHttpClient(httpClient);
-
-            RestTemplate restTemplate = new RestTemplate();
-            restTemplate.setRequestFactory(factory);
-            String finalUrlPath = urlPath;
-            RequestCallback requestCallback = request -> {
-                request.getHeaders().setAccept(Arrays.asList(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL));
-                WebUtils.applyBasicAuthHeaders(request.getHeaders(), finalUrlPath);
-                String proxyAuthorization = fileAttribute.getKkProxyAuthorization();
-                if(StringUtils.hasText(proxyAuthorization)){
-                    Map<String, String> proxyAuthorizationMap = mapper.readValue(
-                            proxyAuthorization,
-                            TypeFactory.defaultInstance().constructMapType(Map.class, String.class, String.class)
-                    );
-                    proxyAuthorizationMap.forEach((headerKey, value) -> request.getHeaders().set(headerKey, value));
-                }
-            };
-            try {
-                restTemplate.execute(url.toURI(), HttpMethod.GET, requestCallback, fileResponse -> {
-                    IOUtils.copy(fileResponse.getBody(), response.getOutputStream());
-                    return null;
-                });
-            }  catch (Exception e) {
-                // 如果是SSL证书错误，给出建议
-                if (e.getMessage() != null &&
-                        (e.getMessage().contains("SSL") ||
-                                e.getMessage().contains("证书") ||
-                                e.getMessage().contains("certificate")) &&
-                        !ConfigConstants.isIgnoreSSL()) {
-                    logger.warn("SSL证书验证失败，建议启用SSL忽略功能或检查证书");
-                }
-                logger.error("获取跨域文件失败", e);
-            } finally {
-                // 确保HttpClient被关闭
-                try {
-                    httpClient.close();
-                } catch (IOException e) {
-                    logger.warn("关闭HttpClient失败", e);
-                }
-            }
+            HttpRequestUtils.executeHttpRequest(url, httpClient, fileAttribute, responseWrapper -> IOUtils.copy(responseWrapper.getInputStream(), response.getOutputStream()));
         } else {
             try {
                 String filename = urlPath.substring(urlPath.lastIndexOf('/') + 1);
@@ -254,20 +200,6 @@ public class OnlinePreviewController {
         }
     }
 
-    /**
-     * 创建根据配置定制的HttpClient
-     */
-    private CloseableHttpClient createConfiguredHttpClient() throws Exception {
-        org.apache.hc.client5.http.impl.classic.HttpClientBuilder builder = HttpClients.custom();
-
-        // 配置SSL和重定向
-        return SslUtils.configureHttpClientBuilder(
-                builder,
-                ConfigConstants.isIgnoreSSL(),
-                ConfigConstants.isEnableRedirect()
-        ).build();
-    }
-
     /**
      * 通过api接口入队
      *