PDF.js消息:文件来源与查看者的来源不匹配(Amazon S3)

问题描述

在Rails应用中，使用pdfjs_viewer-rails gem( https://github.com/senny/pdfjs_viewer-rails )，我一直看到此错误:

In a Rails app, using the pdfjs_viewer-rails gem (https://github.com/senny/pdfjs_viewer-rails), I keep seeing this error:

PDF.js v1.3.91 (build: d1e83b5)
Message: file origin does not match viewer's

我认为这是因为PDF托管在Amazon S3上，并且我已在此处阅读了有关CORS的讨论( https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-xhr ).但是，我无法组装有效的COSR配置.

I presume this is because the PDF is hosted on Amazon S3, and I have read through the discussion of CORS here (https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-xhr). However, I have been unable to assemble a COSR configuration that works.

我当前的存储桶配置是:

My current bucket configuration is:

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <CORSRule>
        <AllowedOrigin>*</AllowedOrigin>
        <AllowedMethod>GET</AllowedMethod>
        <AllowedHeader>Range</AllowedHeader>
        <MaxAgeSeconds>3000</MaxAgeSeconds>
        <ExposeHeader>Accept-Ranges</ExposeHeader>
        <ExposeHeader>Content-Range</ExposeHeader>
        <ExposeHeader>Content-Encoding</ExposeHeader>
        <ExposeHeader>Content-Length</ExposeHeader>
        <AllowedHeader>Authorization</AllowedHeader>
    </CORSRule>
</CORSConfiguration>

为了安全起见，在我的rails应用程序中，我有:

and just to be safe, in my rails app I have:

config.action_dispatch.default_headers = {
      'Access-Control-Allow-Origin' => '*',
      'Access-Control-Request-Method' => %w{GET}.join(",")
    }

还有其他人能够克服这个问题吗?有谁知道与pdf.js和Amazon s3兼容的CORS政策?

Has anyone else been able to overcome this? Does anyone know of a CORS policy that works with pdf.js and amazon s3?

推荐答案

就我而言，问题与CORS无关.我不得不覆盖/pdfjs_viewer/viewer.js并将我的开发和生产url包含在7000行附近的HOSTED_VIEWER_ORIGINS声明中.

In my case the problem was not CORS related. I had to overwrite /pdfjs_viewer/viewer.js and include my development and production urls in the HOSTED_VIEWER_ORIGINS declaration around line 7000.

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