src/main/java/com/g9/g9backend/controller/FileController.java

package com.g9.g9backend.controller;

import com.g9.g9backend.pojo.TorrentRecord;
import com.g9.g9backend.service.TorrentRecordService;
import lombok.Getter;
import lombok.Setter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;

/**
 * FileController 文件控制器类，处理与文件相关的请求
 *
 * @author Seamher
 */
@Getter
@Setter
@RestController
@RequestMapping("/file")
public class FileController {

    private TorrentRecordService torrentRecordService;

    private final Logger logger = LoggerFactory.getLogger(FileController.class);

    public FileController(TorrentRecordService torrentRecordService) {
        this.torrentRecordService = torrentRecordService;
    }

    @PostMapping
    public ResponseEntity<String> uploadFile(@RequestBody MultipartFile file) {
        // 相对路径（可在资源根路径创建 upload 文件夹）
        String UPLOAD_DIR = "/app/upload";

        // 获取原始文件名
        String originalFilename = file.getOriginalFilename();
        if (originalFilename.isEmpty()) {
            return ResponseEntity.badRequest().body("文件名为空");
        }

        // 为文件名加时间戳，防止重名冲突
        String filename = System.currentTimeMillis() + "_" + originalFilename;

        // 构建文件保存目录（确保 upload 目录存在）
        File uploadDir = new File(UPLOAD_DIR);
        if (!uploadDir.exists()) {
            boolean created = uploadDir.mkdirs(); // 创建目录
            if (!created) {
                logger.error("无法创建上传目录: " + uploadDir.getAbsolutePath());
                return ResponseEntity.internalServerError().body("无法创建上传目录");
            }
        }

        // 构建完整的文件路径
        File dest = new File(uploadDir, filename);

        try {
            // 保存文件
            file.transferTo(dest);
        } catch (IOException e) {
            logger.error("上传失败: " + e.getMessage(), e);
            return ResponseEntity.internalServerError().body("上传失败");
        }

        // 返回访问 URL（你可能需要根据 Nginx 的静态资源映射来配置）
        String url = "http://localhost:65/" + filename;

        return ResponseEntity.ok(url);
    }

    @PostMapping(value = "bt")
    public ResponseEntity<String> uploadBTFile(@RequestBody TorrentRecord torrentRecord) {
        torrentRecordService.save(torrentRecord);

        return ResponseEntity.ok("");
    }

}