问题描述

Spring Boot API 定义 GET 请求 API ， 返回视频流。前端通过

解决方法

Spring Framework 文件请求处理

import org.springframework.core.io.FileSystemResource;import org.springframework.core.io.Resource;import org.springframework.stereotype.Component;import org.springframework.web.servlet.resource.ResourceHttpRequestHandler;import javax.servlet.http.HttpServletRequest;import java.nio.file.Path;@Componentpublic class NonStaticResourceHttpRequestHandler extends ResourceHttpRequestHandler {  public final static String ATTR_FILE = "NON-STATIC-FILE";  @Override  protected Resource getResource(HttpServletRequest request) {    final Path filePath = (Path) request.getAttribute(ATTR_FILE);    return new FileSystemResource(filePath);  }}

Controller 层

@RestController@AllArgsConstructorpublic class FileRestController {  private final NonStaticResourceHttpRequestHandler nonStaticResourceHttpRequestHandler;  /**   * 预览视频文件, 支持 byte-range 请求   */  @GetMapping("/video")  public void videoPreview(HttpServletRequest request, HttpServletResponse response) throws Exception {    String path = request.getParameter("path");    Path filePath = Paths.get(path);    if (Files.exists(filePath)) {      String mimeType = Files.probeContentType(filePath);      if (!StringUtils.isEmpty(mimeType)) {        response.setContentType(mimeType);      }      request.setAttribute(NonStaticResourceHttpRequestHandler.ATTR_FILE, filePath);      nonStaticResourceHttpRequestHandler.handleRequest(request, response);    } else {      response.setStatus(HttpServletResponse.SC_NOT_FOUND);      response.setCharacterEncoding(StandardCharsets.UTF_8.toString());    }  }}