java - 在 Jasperreports 中从服务器接收到多个不同的 Content-Disposition header

Question

我正在尝试设置内容处置 header 以响应 servlet，但我在浏览器中收到此错误。我该怎么办？

Duplicate headers received from server

The response from the server contained duplicate headers. This problem is generally the result of a misconfigured website or proxy. Only the website or proxy administrator can fix this issue.

Error 349 (net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION): Multiple distinct Content-Disposition headers received. This is disallowed to protect against HTTP response splitting attacks.

这是我的 servlet Controller :

@RequestMapping("/**/paymentOrderReport.pdf")
public class PaymentOrderReportViewController extends org.springframework.web.servlet.mvc.AbstractController {
    
    private PaymentDao paymentDao;
    private JasperPdfView pdfView;

    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {

        response.setContentType("application/pdf");
        response.setHeader("Content-disposition", "attachment; filename=" + "report.pdf");

        PaymentOrderEntity paymentOrderEntity = null;
        String traceCode = request.getParameter(ParamConstants.TRACE_CODE);

        if (traceCode != null) {
            PaymentSheetRequestEntity payRequestEntity = paymentDao.loadByUniqueProperty(PaymentSheetRequestEntity.PROP_TRACE_CODE,
                    traceCode);
            if (payRequestEntity != null) {
                paymentOrderEntity = payRequestEntity.getPaymentOrder();
            }
        }

        if (paymentOrderEntity != null) {
            List<PaymentOrderEntity> result = new ArrayList<PaymentOrderEntity>();
            result.add(paymentOrderEntity);
            JRDataSource jrDataSource = new JRBeanCollectionDataSource(result);

            Map<String, Object> model = new HashMap<String, Object>();
            model.put("reportData", jrDataSource);

            return new ModelAndView(pdfView, model);
        }
        return null;
    }
    
    public void setPaymentDao(PaymentDao paymentDao) {
        this.paymentDao = paymentDao;
    }

    public void setPdfView(JasperPdfView pdfView) {
        this.pdfView = pdfView;
    }
}

和 JasperPdfView 类:

public class JasperPdfView extends AbstractJasperReportsView {
    
    @Override
    protected void renderReport(JasperPrint populatedReport, Map<String, Object> model, HttpServletResponse response) throws Exception {
        JRPdfExporter jrPdfExporter = new JRPdfExporter();
        if (getConvertedExporterParameters() != null) {
            jrPdfExporter.setParameters(getConvertedExporterParameters());
        }
        jrPdfExporter.setParameter(JRExporterParameter.JASPER_PRINT, populatedReport);
        jrPdfExporter.setParameter(JRExporterParameter.OUTPUT_STREAM, response.getOutputStream());
        jrPdfExporter.exportReport();
    }
    
}

Answer 1

如果您正在下载文件名中包含逗号的文件，谷歌浏览器可能会显示此错误消息。您真的只使用“report.pdf”作为文件名吗？

已阅读 HTTP specs Content-Disposition header (不是 HTTP 规范本身的一部分)不应包含逗号字符，因为它将被视为两个不同 header 的分隔符。

Multiple message-header fields with the same field-name MAY be present in a message if and only if the entire field-value for that header field is defined as a comma-separated list [i.e., #(values)]. It MUST be possible to combine the multiple header fields into one "field-name: field-value" pair, without changing the semantics of the message, by appending each subsequent field-value to the first, each separated by a comma.

因此，如果您的文件名是 report,May2014.pdf，那么 Chrome 会解释

内容配置:附件； filename=report,May2014.pdf

作为同一个 http 消息头的两个值

内容配置:附件；文件名=报告

Content-Disposition: May2014.pdf

这又被解释为 HTTP response splitting attack ，可能是因为在单个 HTTP 响应中实际上不应有多个 Content-Disposition header 值。

其他浏览器似乎并不介意文件名中的逗号。