iText生成的PDF在Chrome中未正确显示 [英] iText generated PDF not shown correctly in Chrome

问题描述

我使用Java中的iText库来生成PDF文件。这个想法是，用户填写一些信息，当用户点击生成按钮时，pdf将显示在浏览器的新选项卡中。现在我偶然发现了一些这样做的问题，它们是：
- URL不会改变，所以而不是/application/user.pdf我得到/application/dashboard.xhtml
- 我可以保存所有浏览器中的pdf文件，除了Chrome。

请注意，我不想将它保存在光盘上，只需在浏览器中显示PDF，以便用户可以选择如果他想保存它的话。

下面是我用来生成我的pdf的代码：

  public static void createPdf（User user，byte languageNumber，HttpServletResponse response）{
 Document document = new Document（）; 
 try {
 / * PdfWriter writer = PdfWriter.getInstance（document，
 new FileOutputStream（c：//+ user.getUsername（）+_+ languageCode +.pdf ））; * / 
 ByteArrayOutputStream baos = new ByteArrayOutputStream（）; 
 PdfWriter.getInstance（document，baos）; 
 document.addTitle（您的简历）; 
 document.addSubject（这是你的简历）; 
 document.addKeywords（CV）; 
 document.addAuthor（user.getUsername（））; 
 document.open（）; 
 document.add（
 new Paragraph（user.getPersonalInformation（）。getFirstname（）++ user.getPersonalInformation（）。getLastname（）））; 
 document.close（）; 
 //设置一些响应头文件
 response.setHeader（Expires，0）; 
 response.setHeader（Cache-Control，
must-revalidate，post-check = 0，pre-check = 0）; 
 response.setHeader（Pragma，public）; 
 //设置内容类型
 response.setContentType（application / pdf）; 
 response.setContentLength（baos.size（））; 
 // ServletOutputStream out = response.getOutputStream（）; 
 OutputStream out = response.getOutputStream（）; 
 baos.writeTo（out）; 
 out.flush（）; 
 out.close（）; 
} catch（DocumentException e）{
 e.printStackTrace（）; 
} catch（IOException e）{
 e.printStackTrace（）; //改变catch语句的主体使用File |设置|文件模板。 
 
 
 
 
 
 $ b 
 * 此方法位于按钮后面我的JSF页面 
  public String exportPdf（）{
 user = userService.retrieveLoginUser（）; 
 FacesContext context = FacesContext.getCurrentInstance（）; 
尝试{
 Object response = context.getExternalContext（）。getResponse（）; 
 if（响应instanceof HttpServletResponse）{
 HttpServletResponse hsr =（HttpServletResponse）响应; 
 PdfCreator.createPdf（user，selectLanguage，hsr）; 
 //告诉JSF跳过生命周期的其余阶段
 context.responseComplete（）; 
} 
返回../+ user.getUsername（）+.pdf; 
} catch（Exception e）{
 e.printStackTrace（）; 
} 
返回null; 
} 
  
使用的技术：
  -  JSF 2.0 
  -  Facelets 
  -  iText 
 
 
 
预先感谢：D 
       >铬是否打开PDF，然后不正确渲染？在这种情况下，请在 http://new.crbug.com 上打开一个问题，并附上一个示例PDF文件显示了问题。在这里回复问题编号。
 
I am using the iText library in Java to generate a pdf file. The idea is that a user fills in some information and that when the user clicks on the generate button the pdf is shown in a new tab in the browser. Now I have stumbled upon some problems doing this, which are :
- the URL does not change, so instead of /application/user.pdf I get /application/dashboard.xhtml
- I can save the pdf file in all browsers except for Chrome.

Please note that I don't want to save it on disc but simply show the pdf in the browser so the user can choose if he wants to save it.

Here is the code that I use to generate my pdf :
     public static void createPdf(User user, byte languageNumber, HttpServletResponse   response) {
Document document = new Document();
    try {
        /*    PdfWriter writer = PdfWriter.getInstance(document,
 new FileOutputStream("c://" + user.getUsername() + "_" + languageCode + ".pdf"));*/
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PdfWriter.getInstance(document, baos);
        document.addTitle("Your CV");
        document.addSubject("This is your CV");
        document.addKeywords("CV");
        document.addAuthor(user.getUsername());
        document.open();
        document.add(
                new Paragraph(user.getPersonalInformation().getFirstname() + " " +    user.getPersonalInformation().getLastname()));
        document.close();
        // setting some response headers
        response.setHeader("Expires", "0");
        response.setHeader("Cache-Control",
            "must-revalidate, post-check=0, pre-check=0");
        response.setHeader("Pragma", "public");
        // setting the content type
        response.setContentType("application/pdf");
        response.setContentLength(baos.size());
        //ServletOutputStream out = response.getOutputStream();
        OutputStream out = response.getOutputStream();
        baos.writeTo(out);
        out.flush();
        out.close();
    } catch (DocumentException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    }
}
*This method is behind a button on my JSF page *
public String exportPdf() {
    user = userService.retrieveLoginUser();
    FacesContext context = FacesContext.getCurrentInstance();
    try {
        Object response = context.getExternalContext().getResponse();
        if (response instanceof HttpServletResponse) {
            HttpServletResponse hsr = (HttpServletResponse) response;
            PdfCreator.createPdf(user, selectLanguage, hsr);
            //Tell JSF to skip the remaining phases of the lifecycle
            context.responseComplete();
        }
        return "../" + user.getUsername() + ".pdf";
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}
Used technologies :
- JSF 2.0
- Facelets
- iText

Thanks in advance :D
解决方案
Does chrome open the PDF and then not render it correctly? In that case, please open an issue at http://new.crbug.com and attach an example PDF file that shows the problem. Reply with the issue number here.

                        
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