从应用程序外部下载文件 [英] Downloading files from outside of the application

问题描述

我使用的是jsf 2.2 Primefaces 6.0，我已经实现了一个解决方案，从应用程序内的资源文件下载图像，它的工作正常，但是当我尝试从外部下载时会出现一个错误信息。我需要帮助可以从应用程序的外部下载：

这里的错误信息：

上下文路径：/ gestion-remboursement-web
Servlet路径：/pages/listDemandes.jsf
路径信息：null
查询字符串：null
堆栈跟踪
javax.servlet.ServletException
javax.faces.webapp.FacesServlet.service（FacesServlet.java:667）
io.undertow.servlet.handlers.ServletHandler.handleRequest（ServletHandler.java:86）
io.undertow.servlet.handlers.FilterHandler $ FilterChainImpl.doFilter（FilterHandler.java:130）
filters.LoginFilter.doFilter（LoginFilter.java:44）

这里是Xhtml代码：

 < p：column style =text-align ：centerheaderText =Télécharger> 
< p：commandButton value =下载ajax =false
 onclick =PrimeFaces.monitorDownload（start，stop）; 
 icon =ui-icon-arrowthick-1-s> 
< p：fileDownload value =＃{fileDownloadView.file}/> 
< f：setPropertyActionListener value =＃{a}
 target =＃{demandeBean.demandeSelectionnee}/> 
< / p：commandButton> 
< / p：column> 
  

这里是java Bean代码：

  public class FileDownloadView {
 
 private StreamedContent file; 
 
 public FileDownloadView（）{
 InputStream stream = FacesContext.getCurrentInstance（）。getExternalContext（）。getResourceAsStream（
http：// localhost：18080 / openCars / images / hichem .JPG）; 
 file = new DefaultStreamedContent（stream，image / jpg，downloaded_optimus.jpg）; 
} 
 
 public StreamedContent getFile（）{
 return file; 
} 
} 
  

解决方案

遇到一些情况来获取pdf文件，使用 java.net.URL＃openStream（）喜欢

  InputStream input = new URL（ HTTP：//本地主机：18080 / openCars /图像/ hichem.jpg）.openStream（）; 
 file = new DefaultStreamedContent（stream，image / jpg，downloaded_optimus.jpg）; 
  

I'm using jsf 2.2 Primefaces 6.0 and i already implemented a solution to download an images from the ressources file inside the application and it works fine but when i try to download from the outside an error message will appear.I need help to can download from the outside of the application:

Here the error message :

Context Path:/gestion-remboursement-web Servlet Path:/pages/listDemandes.jsf Path Info:null Query String:null Stack Trace javax.servlet.ServletException javax.faces.webapp.FacesServlet.service(FacesServlet.java:667) io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130) filters.LoginFilter.doFilter(LoginFilter.java:44)

Here the Xhtml code:

<p:column style="text-align: center" headerText="Télécharger">
                    <p:commandButton value="Download" ajax="false"
                        onclick="PrimeFaces.monitorDownload(start, stop);"
                        icon="ui-icon-arrowthick-1-s">
                        <p:fileDownload value="#{fileDownloadView.file}" />
                    <f:setPropertyActionListener value="#{a}"
                        target="#{demandeBean.demandeSelectionnee}" />
                </p:commandButton>
            </p:column>

Here the java Bean code :

public class FileDownloadView {

    private StreamedContent file;

    public FileDownloadView() {
        InputStream stream = FacesContext.getCurrentInstance().getExternalContext().getResourceAsStream(
                "http://localhost:18080/openCars/images/hichem.jpg");
        file = new DefaultStreamedContent(stream, "image/jpg", "downloaded_optimus.jpg");
    }

    public StreamedContent getFile() {
        return file;
    }
}

解决方案

Similar kind of situation faced to get pdf files, solved using java.net.URL#openStream() like

 InputStream input = new URL("http://localhost:18080/openCars/images/hichem.jpg").openStream();
file = new DefaultStreamedContent(stream, "image/jpg", "downloaded_optimus.jpg");

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