package com.zt.modules.oss.controller;
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import com.zt.common.servlet.Result;
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import com.zt.modules.oss.cloud.AbstractStorageService;
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import io.swagger.annotations.Api;
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import org.apache.tomcat.util.http.fileupload.FileUtils;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.*;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.security.DigestInputStream;
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import java.security.MessageDigest;
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import java.util.Map;
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@RestController
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@RequestMapping("sys/oss")
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@Api(tags = "文件上传")
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public class chunkUploadController {
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@Autowired
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private AbstractStorageService storageService;
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@PostMapping("/upload_chunk/")
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public Result<Boolean> uploadFile(@RequestParam("file") MultipartFile file,
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@RequestParam("uid") String uid,
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@RequestParam("chunk") int chunk,
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@RequestParam("filter_type") String filterType,
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@RequestParam("fileName") String fileName,
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@RequestParam(value = "chunks", required = false) String chunks) {
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try {
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String tempUploadDir = storageService.getConfig().getLocalPath() + File.separator + "TEMP_UPLOAD";
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File dir = new File(tempUploadDir);
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if (!dir.exists()) {
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dir.mkdirs();
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}
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if ("undefined".equals(chunks)) {
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String filePath = tempUploadDir + File.separator + "file_" + uid;
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File destFile = new File(filePath);
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try {
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file.transferTo(destFile);
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} catch (IOException e) {
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e.printStackTrace();
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}
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return Result.ok(false);
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} else {
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// 如果chunks有值，说明是分块上传的逻辑
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int numberOfChunks = Integer.parseInt(chunks);
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String uploadDir = tempUploadDir + File.separator + uid;
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File chunkdir = new File(uploadDir);
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if (!chunkdir.exists()) {
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chunkdir.mkdirs();
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}
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String chunkFileName = uploadDir + File.separator + chunk;
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byte[] fileBytes = file.getBytes();
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try (FileOutputStream fos = new FileOutputStream(chunkFileName)) {
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fos.write(fileBytes);
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}
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if (chunk == numberOfChunks - 1) {
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// 所有文件块上传完成，可以将它们合并成最终文件
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String finalFileName = tempUploadDir + File.separator + "file_" + uid;
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File finalFile = new File(finalFileName);
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try (FileOutputStream fos = new FileOutputStream(finalFile)) {
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for (int i = 0; i < numberOfChunks; i++) {
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String chunkFilePath = uploadDir + File.separator + i;
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File chunkFile = new File(chunkFilePath);
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try (FileInputStream fis = new FileInputStream(chunkFile)) {
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byte[] buffer = new byte[1024];
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int bytesRead;
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while ((bytesRead = fis.read(buffer)) != -1) {
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fos.write(buffer, 0, bytesRead);
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}
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}
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}
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} catch (IOException e) {
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e.printStackTrace();
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return Result.ok(false);
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} finally {
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// 删除临时文件块目录及其内容
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try {
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FileUtils.deleteDirectory(chunkdir);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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return Result.ok(true);
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} catch (IOException e) {
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e.printStackTrace();
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return Result.ok();
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}
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}
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@PostMapping("/upload_success/")
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public Result<Boolean> validateUploadedFile(@RequestBody Map<String, Object> fileData) {
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String name = (String) fileData.get("name");
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String uid = (String) fileData.get("uid");
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String md5 = (String) fileData.get("md5");
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int chunks = (int) fileData.get("chunks");
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String filterType = (String) fileData.get("filter_type");
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if (validateFile(name, uid, md5, chunks, filterType)) {
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return Result.ok(true);
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} else {
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return Result.ok(false);
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}
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}
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// 文件校验方法，根据文件名、uid、MD5哈希值、块数等参数进行校验
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private boolean validateFile(String name, String uid, String md5, int chunks, String filterType) {
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String filePath = storageService.getConfig().getLocalPath() + File.separator + "TEMP_UPLOAD" + File.separator + "file_" + uid;
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String calculatedMd5 = calculateFileMd5(filePath);
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if (calculatedMd5 != null && calculatedMd5.equals(md5)) {
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// 如果MD5校验通过，返回 true
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return true;
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} else {
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// 如果MD5校验失败，返回 false
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return false;
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}
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}
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private String calculateFileMd5(String filePath) {
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FileInputStream fileInputStream = null;
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DigestInputStream digestInputStream = null;
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try {
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File file = new File(filePath);
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FileInputStream fis = new FileInputStream(file);
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MessageDigest md = MessageDigest.getInstance("MD5");
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byte[] buffer = new byte[1024];
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int length = -1;
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while ((length = fis.read(buffer, 0, 1024)) != -1) {
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md.update(buffer, 0, length);
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}
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byte[] md5Bytes = md.digest();
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StringBuffer hexValue = new StringBuffer();
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for (int i = 0; i < md5Bytes.length; i++) {
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int val = ((int) md5Bytes[i]) & 0xff;
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if (val < 16)
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hexValue.append("0");
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hexValue.append(Integer.toHexString(val));
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}
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return hexValue.toString();
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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} finally {
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try {
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if (digestInputStream != null) {
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digestInputStream.close();
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}
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if (fileInputStream != null) {
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fileInputStream.close();
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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}
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