package cc.mrbird.febs.ai.controller.productPoint;
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import cc.mrbird.febs.common.utils.LoginUserUtil;
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import cn.hutool.core.util.StrUtil;
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import io.swagger.annotations.Api;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.http.HttpStatus;
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import org.springframework.validation.annotation.Validated;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.io.RandomAccessFile;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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@Slf4j
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@Validated
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@RestController
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@RequiredArgsConstructor
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@RequestMapping(value = "/api/ai/videoPlay")
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@Api(value = "VideoPlayController", tags = "AI-视屏播放")
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public class VideoPlayController {
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public static final String baseUploadDir = "/home/javaweb/webresource/ai/file";
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@GetMapping("/play/{fileName}/{companyId}")
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public void playVideo(@PathVariable("fileName") String fileName,@PathVariable("companyId") String companyId, HttpServletRequest request, HttpServletResponse response) {
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log.info("开始播放视频文件: {}", fileName);
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// 配置参数
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final int BUFFER_SIZE = 1024 * 1024; // 1MB缓冲区，提高I/O性能
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final long MAX_INITIAL_SEGMENT = 1024 * 1024 * 15; // 最大初始片段大小（15MB），约30秒中等码率视频
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try {
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// String companyId = LoginUserUtil.getLoginUser().getCompanyId();
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String uploadDir = baseUploadDir + "/" + companyId;
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Path filePath = Paths.get(uploadDir, fileName);
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// 检查文件是否存在
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if (!Files.exists(filePath)) {
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log.warn("视频文件不存在: {}", filePath);
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response.setStatus(HttpStatus.NOT_FOUND.value());
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return;
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}
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// 检查文件是否为常规文件
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if (!Files.isRegularFile(filePath)) {
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log.warn("路径不是常规文件: {}", filePath);
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response.setStatus(HttpStatus.BAD_REQUEST.value());
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return;
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}
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// 获取文件大小
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long fileSize = Files.size(filePath);
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log.debug("视频文件大小: {} bytes", fileSize);
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// 检查是否有Range请求头
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String rangeHeader = request.getHeader("Range");
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if (rangeHeader != null) {
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log.debug("收到Range请求: {}", rangeHeader);
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// 解析Range头，格式为"bytes=start-end"
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String[] ranges = rangeHeader.replace("bytes=", "").split("-");
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long start = 0, end = fileSize - 1;
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try {
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if (!ranges[0].isEmpty()) {
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start = Long.parseLong(ranges[0]);
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}
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if (ranges.length > 1 && !ranges[1].isEmpty()) {
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end = Long.parseLong(ranges[1]);
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} else {
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// 如果没有指定结束位置，返回从开始位置到文件末尾的内容
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// 但限制最大长度，避免一次性传输过大的内容
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end = Math.min(start + BUFFER_SIZE * 10, fileSize - 1);
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}
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} catch (NumberFormatException e) {
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log.error("无效的Range头格式: {}", rangeHeader, e);
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response.setStatus(HttpStatus.BAD_REQUEST.value());
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return;
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}
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// 确保范围有效
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if (start > end || start >= fileSize) {
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log.warn("无效的Range范围: {}-{}，文件大小: {}", start, end, fileSize);
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response.setStatus(HttpStatus.REQUESTED_RANGE_NOT_SATISFIABLE.value());
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response.setHeader("Content-Range", "bytes */" + fileSize);
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return;
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}
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// 限制结束位置不超过文件大小
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if (end >= fileSize) {
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end = fileSize - 1;
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}
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// 计算内容长度
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long contentLength = end - start + 1;
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log.debug("处理Range请求: {}-{}，长度: {}", start, end, contentLength);
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// 设置响应状态和头部信息
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response.setStatus(HttpStatus.PARTIAL_CONTENT.value());
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response.setContentType(getContentTypeByExtension(fileName));
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response.setContentLengthLong(contentLength);
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response.setHeader("Content-Range", "bytes " + start + "-" + end + "/" + fileSize);
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response.setHeader("Accept-Ranges", "bytes");
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response.setHeader("Content-Disposition", "inline; filename=\"" + fileName + "\"");
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response.setHeader("Cache-Control", "public, max-age=3600"); // 添加缓存控制
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// 使用NIO提高读取性能
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try (RandomAccessFile randomAccessFile = new RandomAccessFile(filePath.toFile(), "r");
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OutputStream outputStream = response.getOutputStream()) {
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randomAccessFile.seek(start);
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byte[] buffer = new byte[BUFFER_SIZE];
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long remaining = contentLength;
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int bytesRead;
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while (remaining > 0 && (bytesRead = randomAccessFile.read(buffer, 0, (int) Math.min(buffer.length, remaining))) != -1) {
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outputStream.write(buffer, 0, bytesRead);
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remaining -= bytesRead;
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// 定期刷新输出流，避免缓冲区溢出
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if (remaining % (BUFFER_SIZE * 4) == 0) {
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outputStream.flush();
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}
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}
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// 确保所有数据都被写入
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outputStream.flush();
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log.debug("Range请求处理完成: {}-{}", start, end);
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}
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} else {
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log.debug("收到完整文件请求，返回初始片段");
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// 没有Range头，返回文件大小的10分之一和15MB中较小的那个
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long oneTenthSize = fileSize / 10;
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// 计算10分之一和15MB的较小值
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long maxInitialSize = Math.min(oneTenthSize, MAX_INITIAL_SEGMENT);
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// 确保至少返回1字节，且不超过文件大小
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long actualEnd = Math.min(Math.max(maxInitialSize, 1), fileSize - 1);
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log.debug("返回初始片段: {} bytes (10分之一大小: {} bytes, 15MB限制: {} bytes, 文件总大小: {} bytes)",
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actualEnd + 1, oneTenthSize, MAX_INITIAL_SEGMENT, fileSize);
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// 设置响应状态和头部信息
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response.setStatus(HttpStatus.PARTIAL_CONTENT.value()); // 使用206状态码，因为只返回部分内容
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response.setContentType(getContentTypeByExtension(fileName));
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response.setContentLengthLong(actualEnd + 1);
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response.setHeader("Content-Range", "bytes 0-" + actualEnd + "/" + fileSize);
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response.setHeader("Accept-Ranges", "bytes");
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response.setHeader("Content-Disposition", "inline; filename=\"" + fileName + "\"");
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response.setHeader("Cache-Control", "public, max-age=3600"); // 添加缓存控制
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// 流式传输文件的初始片段
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try (InputStream inputStream = Files.newInputStream(filePath);
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OutputStream outputStream = response.getOutputStream()) {
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byte[] buffer = new byte[BUFFER_SIZE];
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long written = 0;
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int bytesRead;
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while (written <= actualEnd && (bytesRead = inputStream.read(buffer)) != -1) {
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long toWrite = Math.min(bytesRead, actualEnd + 1 - written);
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outputStream.write(buffer, 0, (int)toWrite);
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written += toWrite;
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// 定期刷新输出流
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if (written % (BUFFER_SIZE * 4) == 0) {
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outputStream.flush();
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}
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// 如果已经写完初始片段，则停止
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if (written > actualEnd) {
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break;
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}
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}
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// 确保所有数据都被写入
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outputStream.flush();
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log.debug("初始片段传输完成，大小: {} bytes", written);
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}
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}
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} catch (Exception e) {
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log.error("播放视频文件时发生错误: {}", fileName, e);
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try {
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// 确保响应状态被设置
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if (!response.isCommitted()) {
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response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
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}
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} catch (Exception ex) {
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log.error("设置响应状态时发生错误", ex);
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}
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} finally {
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log.info("视频播放请求处理完成: {}", fileName);
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}
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}
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/**
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* 根据文件扩展名获取MIME类型
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*/
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private String getContentTypeByExtension(String fileName) {
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String extension = "";
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int lastDotIndex = fileName.lastIndexOf('.');
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if (lastDotIndex > 0) {
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extension = fileName.substring(lastDotIndex).toLowerCase();
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}
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switch (extension) {
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case ".mp4":
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return "video/mp4";
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case ".avi":
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return "video/x-msvideo";
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case ".mov":
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return "video/quicktime";
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case ".wmv":
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return "video/x-ms-wmv";
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case ".flv":
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return "video/x-flv";
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case ".webm":
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return "video/webm";
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case ".mkv":
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return "video/x-matroska";
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case ".m3u8":
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return "application/vnd.apple.mpegurl";
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case ".ts":
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return "video/MP2T";
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default:
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return "application/octet-stream";
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}
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}
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}
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