PrimeFaces.monitorDownload未触发JS函数 [英] JS function not triggered with PrimeFaces.monitorDownload
问题描述
我正在使用 Primefaces 4.0 下载文件.我只想在下载完成时触发JS函数，但似乎不起作用(在Firefox和Google Chrome中尝试过).我的测试用例看起来与 PF文档中的操作类似:
I'm working in file downloading with Primefaces 4.0. I just want to trigger a JS function when download completes, but seems not to work (tried in Firefox and Google Chrome). My test case looks similar to what's done in the PF docs:
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head />
<h:body>
<script type="text/javascript">
function startMessage() {
alert("Download started!");
}
function finishMessage() {
alert("Download finished!");
}
</script>
<h:form>
<p:commandButton value="Download" ajax="false"
icon="ui-icon-arrowreturnthick-1-s"
onclick="PrimeFaces.monitorDownload(startMessage, finishMessage)">
<p:fileDownload value="#{bean.file}" />
</p:commandButton>
</h:form>
</h:body>
</html>
@ManagedBean
@ViewScoped
public class Bean implements Serializable {
public StreamedContent getFile() {
return new DefaultStreamedContent(new ByteArrayInputStream(new byte[0]));
}
}
下载开始时触发警报，但下载完成时不触发.其他人可以尝试一下吗?
The alert is triggered when download starts, but not when download finishes. Could anyone else give it a try?
推荐答案
这是一个错误.
主要错误位于org.primefaces.component.filedownload程序包的FileDownloadActionListener中.
The main bug is in FileDownloadActionListener of org.primefaces.component.filedownload package.
第65行
externalContext.addResponseCookie(Constants.DOWNLOAD_COOKIE, "true", Collections.<String, Object>emptyMap());
Constants.DOWNLOAD_COOKIE是"primefaces.download"，并且永远不会随响应一起发送.
The Constants.DOWNLOAD_COOKIE is "primefaces.download", and it's never sent with the response.
这将导致PrimeFaces.monitorDownload的时间间隔从不调用stop函数，因为从不写入cookie.
That would cause PrimeFaces.monitorDownload's Interval to never call the stop function, since the cookie is never written.
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