feat: domainName 改为可选，未配置时自动从请求地址推断

- app-dev.yml 注释掉默认 domainName
- ParserApi 添加 getLinkPrefix() 支持 X-Forwarded-Host 反向代理
- ServerApi 传递 _requestOrigin 到 otherParam 供 parser 层使用
- URLParamUtil.addParam() 读不到配置时用 _requestOrigin 兜底
- AppMain 启动日志 domainName 为空时显示本地端口地址

web-service/src/main/java/cn/qaiu/lz/AppMain.java

@@ -81,6 +81,9 @@ public class AppMain {
                             loadPlaygroundParsers();
                             
                             String addr = jsonObject.getJsonObject(ConfigConstant.SERVER).getString("domainName");
+                            if (addr == null || addr.isBlank()) {
+                                addr = "http://127.0.0.1:" + jsonObject.getJsonObject(ConfigConstant.SERVER).getInteger("port", 6400);
+                            }
                             System.out.println("启动成功: \n本地服务地址: " + addr);
                         });
                     });

web-service/src/main/java/cn/qaiu/lz/common/util/URLParamUtil.java

@@ -119,11 +119,17 @@ public class URLParamUtil {
         }
 
         String linkPrefix = SharedDataUtil.getJsonConfig("server").getString("domainName");
-        parserCreate.getShareLinkInfo().getOtherParam().put("domainName", linkPrefix);
+        if (StringUtils.isBlank(linkPrefix)) {
+            // 未配置 domainName 时，从请求地址推断
+            linkPrefix = parserCreate.getShareLinkInfo().getOtherParam()
+                    .getOrDefault("_requestOrigin", "").toString();
+        }
+        if (StringUtils.isNotBlank(linkPrefix)) {
+            parserCreate.getShareLinkInfo().getOtherParam().put("domainName", linkPrefix);
+        }
     }
 
     /**
-     * 添加临时认证参数（一次性，不保存到数据库或共享内存）
      * 如果提供了临时认证参数，将覆盖后台配置的认证信息
      * 
      * @param parserCreate ParserCreate对象
@@ -155,7 +161,13 @@ public class URLParamUtil {
         }
         
         String linkPrefix = SharedDataUtil.getJsonConfig("server").getString("domainName");
-        parserCreate.getShareLinkInfo().getOtherParam().put("domainName", linkPrefix);
+        if (StringUtils.isBlank(linkPrefix)) {
+            linkPrefix = parserCreate.getShareLinkInfo().getOtherParam()
+                    .getOrDefault("_requestOrigin", "").toString();
+        }
+        if (StringUtils.isNotBlank(linkPrefix)) {
+            parserCreate.getShareLinkInfo().getOtherParam().put("domainName", linkPrefix);
+        }
 
         // 构建临时认证信息
         MultiMap tempAuth = MultiMap.caseInsensitiveMultiMap();

web-service/src/main/java/cn/qaiu/lz/web/controller/ParserApi.java

@@ -43,6 +43,30 @@ public class ParserApi {
 
     private final DbService dbService = AsyncServiceUtil.getAsyncServiceInstance(DbService.class);
 
+    /**
+     * 获取链接前缀：优先用配置的 domainName，未配置则从请求头推断
+     * 支持反向代理：优先读 X-Forwarded-Host/X-Forwarded-Proto，再回退到 Host 头
+     */
+    private static String getLinkPrefix(HttpServerRequest request) {
+        String domainName = SharedDataUtil.getJsonConfig("server").getString("domainName");
+        if (StringUtils.isNotBlank(domainName)) {
+            return domainName;
+        }
+        if (request != null) {
+            // 反向代理场景：优先从转发头获取原始域名
+            String forwardedHost = request.getHeader("X-Forwarded-Host");
+            if (StringUtils.isNotBlank(forwardedHost)) {
+                String proto = request.getHeader("X-Forwarded-Proto");
+                if (StringUtils.isBlank(proto)) {
+                    proto = request.scheme();
+                }
+                return proto + "://" + forwardedHost;
+            }
+            return request.scheme() + "://" + request.host();
+        }
+        return "";
+    }
+
 
     @RouteMapping(value = "/statisticsInfo", method = RouteMethod.GET, order = 99)
     public Future<StatisticsInfo> statisticsInfo() {
@@ -62,9 +86,9 @@ public class ParserApi {
         // 构建链接信息响应，如果有 auth 参数则附加到链接中
         String authSuffix = (auth != null && !auth.isEmpty()) ? "&auth=" + auth : "";
         LinkInfoResp build = LinkInfoResp.builder()
-                .downLink(getDownLink(parserCreate, false) + authSuffix)
+                .downLink(getDownLink(parserCreate, false, request) + authSuffix)
-                .apiLink(getDownLink(parserCreate, true) + authSuffix)
+                .apiLink(getDownLink(parserCreate, true, request) + authSuffix)
-                .viewLink(getViewLink(parserCreate) + authSuffix)
+                .viewLink(getViewLink(parserCreate, request) + authSuffix)
                 .shareLinkInfo(shareLinkInfo).build();
         // 解析次数统计
         shareLinkInfo.getOtherParam().put("UA",request.headers().get("user-agent"));
@@ -82,9 +106,8 @@ public class ParserApi {
         return promise.future();
     }
 
-    private static String getDownLink(ParserCreate create, boolean isJson) {
+    private static String getDownLink(ParserCreate create, boolean isJson, HttpServerRequest request) {
-
+        String linkPrefix = getLinkPrefix(request);
-        String linkPrefix = SharedDataUtil.getJsonConfig("server").getString("domainName");
         if (StringUtils.isBlank(linkPrefix)) {
             linkPrefix = "http://127.0.0.1";
         }
@@ -92,9 +115,8 @@ public class ParserApi {
         return linkPrefix + (isJson ? "/json/" : "/d/") + create.genPathSuffix();
     }
 
-    private static String getViewLink(ParserCreate create) {
+    private static String getViewLink(ParserCreate create, HttpServerRequest request) {
-
+        String linkPrefix = getLinkPrefix(request);
-        String linkPrefix = SharedDataUtil.getJsonStringForServerConfig("domainName");
         if (StringUtils.isBlank(linkPrefix)) {
             return "";
         }
@@ -119,7 +141,7 @@ public class ParserApi {
     public Future<List<FileInfo>> getFileList(HttpServerRequest request, String pwd, String dirId, String uuid) {
         String url = URLParamUtil.parserParams(request);
         ParserCreate parserCreate = ParserCreate.fromShareUrl(url).setShareLinkInfoPwd(pwd);
-        String linkPrefix = SharedDataUtil.getJsonConfig("server").getString("domainName");
+        String linkPrefix = getLinkPrefix(request);
         parserCreate.getShareLinkInfo().getOtherParam().put("domainName", linkPrefix);
         if (StringUtils.isNotBlank(dirId)) {
             parserCreate.getShareLinkInfo().getOtherParam().put("dirId", dirId);
@@ -132,7 +154,7 @@ public class ParserApi {
 
     // 目录解析下载文件
     // @RouteMapping("/getFileDownUrl/:type/:param")
-    public Future<String> getFileDownUrl(String type, String param) {
+    public Future<String> getFileDownUrl(HttpServerRequest request, String type, String param) {
         ParserCreate parserCreate = ParserCreate.fromType(type).shareKey("-") // shareKey not null
                 .setShareLinkInfoPwd("-");
 
@@ -147,16 +169,16 @@ public class ParserApi {
         shareLinkInfo.getOtherParam().put("paramJson", new JsonObject(paramStr));
 
         // domainName
-        String linkPrefix = SharedDataUtil.getJsonConfig("server").getString("domainName");
+        String linkPrefix = getLinkPrefix(request);
         shareLinkInfo.getOtherParam().put("domainName", linkPrefix);
         return parserCreate.createTool().parseById();
     }
 
     @RouteMapping("/redirectUrl/:type/:param")
-    public Future<Void> redirectUrl(HttpServerResponse response, String type, String param) {
+    public Future<Void> redirectUrl(HttpServerRequest request, HttpServerResponse response, String type, String param) {
         Promise<Void> promise = Promise.promise();
 
-        getFileDownUrl(type, param)
+        getFileDownUrl(request, type, param)
                 .onSuccess(res -> {
                     ResponseUtil.redirect(response, res);
                     promise.complete();
@@ -232,11 +254,11 @@ public class ParserApi {
 
 
     @RouteMapping("/viewUrl/:type/:param")
-    public Future<Void> viewUrl(HttpServerResponse response, String type, String param) {
+    public Future<Void> viewUrl(HttpServerRequest request, HttpServerResponse response, String type, String param) {
         Promise<Void> promise = Promise.promise();
 
         String viewPrefix = SharedDataUtil.getJsonConfig("server").getString("previewURL");
-        getFileDownUrl(type, param)
+        getFileDownUrl(request, type, param)
                 .onSuccess(res -> {
                     String url = viewPrefix + URLEncoder.encode(res, StandardCharsets.UTF_8);
                     ResponseUtil.redirect(response, url);

web-service/src/main/java/cn/qaiu/lz/web/controller/ServerApi.java

@@ -68,7 +68,8 @@ public class ServerApi {
             key = keys[0];
             pwd = keys[1];
         }
-        return cacheService.getCachedByShareKeyAndPwd(type, key, pwd, JsonObject.of("UA",request.headers().get("user-agent")));
+        String origin = request.scheme() + "://" + request.host();
+        return cacheService.getCachedByShareKeyAndPwd(type, key, pwd, JsonObject.of("UA",request.headers().get("user-agent"), "_requestOrigin", origin));
     }
 
     @RouteMapping(value = "/:type/:key", method = RouteMethod.GET)
@@ -80,7 +81,8 @@ public class ServerApi {
             key = keys[0];
             pwd = keys[1];
         }
-        cacheService.getCachedByShareKeyAndPwd(type, key, pwd, JsonObject.of("UA",request.headers().get("user-agent")))
+        String origin = request.scheme() + "://" + request.host();
+        cacheService.getCachedByShareKeyAndPwd(type, key, pwd, JsonObject.of("UA",request.headers().get("user-agent"), "_requestOrigin", origin))
                 .onSuccess(res -> ResponseUtil.redirect(
                         response.putHeader("nfd-cache-hit", res.getCacheHit().toString())
                                 .putHeader("nfd-cache-expires", res.getExpires()),
@@ -97,7 +99,8 @@ public class ServerApi {
      * @return JsonObject
      */
     private JsonObject buildOtherParam(HttpServerRequest request, String auth) {
-        JsonObject otherParam = JsonObject.of("UA", request.headers().get("user-agent"));
+        String requestOrigin = request.scheme() + "://" + request.host();
+        JsonObject otherParam = JsonObject.of("UA", request.headers().get("user-agent"), "_requestOrigin", requestOrigin);
 
         // 解码认证参数
         if (auth != null && !auth.isEmpty()) {

web-service/src/main/resources/app-dev.yml

@@ -4,8 +4,8 @@ server:
   contextPath: /
   # 使用数据库
   enableDatabase: true
-  # 服务域名或者IP 生成二维码链接时需要
+  # 服务域名或者IP 生成二维码链接时需要，不设置则自动从请求地址获取
-  domainName: http://127.0.0.1:6401
+#  domainName: http://127.0.0.1:6401
   # 预览服务URL
   previewURL: https://nfd-parser.github.io/nfd-preview/preview.html?src=
   # auth参数加密密钥（16位AES密钥）