HttpServletResponse.addHeader()和setHeader()在Spring控制器中不起作用 [英] HttpServletResponse.addHeader() and setHeader() not working in Spring Controller

问题描述

我正在尝试使用Spring-MVC、Spring-Boot和Spring安全来构建一个小型Web应用程序。仅使用一个控制器，并且服务端点之一是让用户下载由网络应用程序生成的DOCX文件。我的逻辑代码运行得很好，问题是当我想向HttpServletResponse添加头时，addHeader()和setHeader()不起作用，我只想为下载文件指定一个名称。我打印了一些日志，但不知道这为什么不起作用。

以下是我的控制器的部分代码：

@Controller
public class ImportExportController {

    private final static Logger LOGGER = LoggerFactory.getLogger(ImportExportController.class);

    @Autowired
    private WordProcessor wordProcessor;

    @RequestMapping("/export")
    public void export(@RequestParam(value = "domainName", required = true) String domainName,
                       @RequestParam(value = "projectName", required = true) String projectName,
                       @RequestParam(value = "testFolderId", required = true) int testFolderId,
                       HttpServletRequest request, HttpServletResponse response) {

        String exportedFileName = "exportedTC_" + domainName + "_" + projectName + "_"
                + Integer.toString(testFolderId) + ".docx";

        try {
            extendExpiredALMSession();
            SaveToZipFile saver = wordProcessor.ExportToWord(domainName, projectName,
                                                             Integer.toString(testFolderId));
            saver.save(response.getOutputStream());
            response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
            LOGGER.info("exportedFileName: " + exportedFileName);
            LOGGER.info("contains: " + response.containsHeader("Content-Disposition"));
            response.addHeader("Content-Disposition", "attachment; filename="" + exportedFileName + """);
            for (String name : response.getHeaderNames()) {
                LOGGER.info("Header: " + name);
            }
            LOGGER.info("Date Header:" + response.getHeader("Date"));
            LOGGER.info("Content-Disposition header: " + response.getHeader("Content-Disposition"));
            LOGGER.info("ContentType: " + response.getHeader("ContentType"));
            response.flushBuffer();
        } catch (RequestFailureException | RESTAPIException | InvalidDataException | UnLoginException
                | UnAuthorizedOperationException | IOException | Docx4JException | URISyntaxException e) {
            e.printStackTrace();
        }
    }
}

这是我得到的日志，您可以看到标头"Content-Disposal"和"Content Type"都为空。

2014-05-07_13:35:05.646 INFO  c.c.p.a.w.w.ImportExportController - exportedFileName: exportedTC_DEFAULT_JIRA_Test_CPL5_4520.docx
2014-05-07_13:35:05.646 INFO  c.c.p.a.w.w.ImportExportController - contains: false
2014-05-07_13:35:05.646 INFO  c.c.p.a.w.w.ImportExportController - Header: X-Content-Type-Options
2014-05-07_13:35:05.646 INFO  c.c.p.a.w.w.ImportExportController - Header: X-XSS-Protection
2014-05-07_13:35:05.646 INFO  c.c.p.a.w.w.ImportExportController - Header: Cache-Control
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Header: Pragma
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Header: Expires
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Header: X-Frame-Options
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Header: X-Application-Context
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Header: Transfer-Encoding
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Header: Date
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Date Header:Wed, 07 May 2014 17:35:05 GMT
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - Content-Disposition header: null
2014-05-07_13:35:05.647 INFO  c.c.p.a.w.w.ImportExportController - ContentType: null

感谢您的阅读。任何帮助都将不胜感激。

推荐答案

原来是Spring控制器对所有响应都有默认的头，这样我就可以访问响应体，但不能访问头。要设置HttpHeaders，请返回HttpEntity。解决方案代码如下：

  @RequestMapping(value = "/export", method = RequestMethod.GET, produces = "application/vnd.openxmlformats-officedocument.wordprocessingml.document")
    public HttpEntity<byte[]> export(@RequestParam(value = "domainName", required = true) String domainName,
                                     @RequestParam(value = "projectName", required = true) String projectName,
                                     @RequestParam(value = "testFolderId", required = true) int testFolderId) {

    String exportedFileName = "exportedTC_" + domainName + "_" + projectName + "_"
            + Integer.toString(testFolderId) + ".docx";
    SaveToZipFile saver = null;
    ByteArrayOutputStream out = null;
    HttpHeaders responseHeaders = null;
    byte[] documentBody = null;
    try {
        extendExpiredALMSession();
        saver = wordProcessor.ExportToWord(domainName, projectName, Integer.toString(testFolderId));
        out = new ByteArrayOutputStream();
        saver.save(out);
        responseHeaders = new HttpHeaders();
        responseHeaders.add("Content-Type",
                            "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
        responseHeaders.add("Content-Disposition", "attachment; filename="" + exportedFileName + """);
        documentBody = out.toByteArray();
    } catch (RequestFailureException | RESTAPIException | InvalidDataException | UnLoginException
            | UnAuthorizedOperationException | IOException | Docx4JException | URISyntaxException e) {
        e.printStackTrace();
    }
    return new HttpEntity<byte[]>(documentBody, responseHeaders);
    }

这对我有效。

这篇关于HttpServletResponse.addHeader()和setHeader()在Spring控制器中不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！