为Heroku静态编译pdftk。需要将PDF分成单页文件 [英] Statically compile pdftk for Heroku. Need to split PDF into single page files

问题描述

所以我们使用heroku来托管我们的rails应用程序。我们已经转移到雪松堆栈。该堆栈没有安装pdftk库。我联系了支持人员，并被告知要为amd64 ubuntu进行静态编译，并将其包含在我的应用程序中。

事实证明这比我想象的要困难得多。最初，我下载了ubuntu的软件包（ http://packages.ubuntu.com/natty/pdftk ），提取它，并包含二进制文件以及共享库。我遇到了一些奇怪的错误：

 未处理的Java异常：
 java.lang.NullPointerException 
 at com.lowagie.text.pdf.PdfCopy.copyIndi​​rect（pdftk）
 at com.lowagie.text.pdf.PdfCopy.copyObject（pdftk）
 at com.lowagie.text.pdf.PdfCopy.copyDictionary（ pdftk）
  

我假设这是因为某些依赖没有安装？

所以，这里是我的问题：

1. 是否有更简单的方法来静态编译库？或者我需要移动它的二进制文件以及它的所有库和依赖项？


2. 我只是试图在ruby中将多页PDF分割成单页文件。有没有办法做到这一点没有PDFTK？或者我坚持尝试静态编译PDFTK？

感谢您的帮助，我知道这不是一个简单的问题，但真的会很感激这个帮助。我已经浪费了近6个小时，试图让这件该死的东西起作用。

灵活性。因此，感觉越来越像我以前管理和维护自己的服务器的日子。没有简单的解决方案。我的猴子补丁是将文件发送到服务器，我可以安装PDFTK，处理文件并将其发回。不是很好，但它有效。不得不处理这个问题，这就违背了使用heroku的目的。

So we're using heroku to host our rails application. We've moved to the cedar stack. This stack does not have the pdftk library installed. I contacted support and was told to statically compile it for amd64 ubuntu and include it in my application.

This has proved more difficult than I thought. Initially I downloaded the package for ubuntu (http://packages.ubuntu.com/natty/pdftk), extracted it, and included the binary file as well as the shared libraries. I'm getting strange errors like:

Unhandled Java Exception:
java.lang.NullPointerException
   at com.lowagie.text.pdf.PdfCopy.copyIndirect(pdftk)
   at com.lowagie.text.pdf.PdfCopy.copyObject(pdftk)
   at com.lowagie.text.pdf.PdfCopy.copyDictionary(pdftk)

I'm assuming this is because some of the dependencies aren't installed?

So here are my questions:

1. Is there an easier way to statically compile a library? Or do I need to move over its binary file as well as all of its libraries and dependencies?
2. I'm just trying to split a multi-page PDF into single page files in ruby. Is there a way to do this without PDFTK? Or am I stuck with trying to statically compile PDFTK?

Thanks for the help, I know this isn't an easy problem, but would really appreciate help with this one. I've wasted close to 6 hours trying to get this damn thing to work.

解决方案

Unfortunately Heroku keeps stripping out magic to add flexibility. As a result it feels more and more like the days when I used to manage and maintain my own servers. There is no easy solution. My "monkey patch" is to send the file to a server that I can install PDFTK, process the file, and send it back. Not great, but it works. Having to deal with this defeats the purpose of using heroku.

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