如何在RichFaces 4 fileUpload组件中显示有关最大文件大小限制的消息 [英] How to display message about maximum file size restriction in RichFaces 4 fileUpload component

问题描述

我已经使用RichFaces 4.3实现了文件上传.文件上传可以正常工作，有关文件类型的警报也可以，但是有关最大文件大小限制的警报则不能.文件上传代码:

I have implemented a file upload using RichFaces 4.3. File upload works fine, alert about file types works fine, but alert about max file size restriction doesn't. File upload code:

<rich:fileUpload id="bannerUpload"
    fileUploadListener="#{bean.bannerListener}"
    acceptedTypes="png, gif, jpg, jpeg"
    ontyperejected="alert('#{msg.bannerFormatRestriction}');"
    maxFilesQuantity="1"
    sizeExceededLabel="File size is restricted. Max allowed size is 1 MB."
    serverErrorLabel="File was not uploaded. Please try again."
    addLabel="Select image for banner">
</rich:fileUpload>

设置上下文参数，并进行限制.但是不会显示警报消息.任何建议表示赞赏.

Context parameters are set up and restriction works. But alert message is not displayed. Any suggestion is appreciated.

更新

消息问题与fileupload.js.jsf line 213有关.
Firebug中的错误消息:Load denied by X-Frame-Options: ...?rf_fu_uid=... does not permit framing.和Error: Permission denied to access property 'document' var contentDocument = event.target.contentWindow.document.

推荐答案

您需要一种机制来显示fileUpload生成的面部消息，例如:

You need a mechanism to show the faces messages generated by the fileUpload, e.g.:

<rich:message for="bannerUpload" showDetail="true" ajaxRendered="true"/> 

更新

根据错误文本"Load denied by X-Frame-Options: ...?rf_fu_uid=... does not permit framing."，在我看来，有两种可能的原因:

According to the error text "Load denied by X-Frame-Options: ...?rf_fu_uid=... does not permit framing.", to me it looks like there are two possible causes:

1. X-Frame-Options标头具有值DENY.将其更改为SAMEORIGIN以允许为您的网站框架.
2. X-Frame-Options标头具有值SAMEORIGIN，但是出于某种原因，fileUpload尝试将来自不同域的内容放入帧中.

1. X-Frame-Options header has the value DENY. Change it to SAMEORIGIN to allow framing for your site.
2. X-Frame-Options header has the value SAMEORIGIN, but for some reason fileUpload tries to put into a frame something from different domain.

两者都可以在Firebug的网络"标签上选中.

Both can be checked on the Network tab of Firebug.

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