如何生成在文档查看器中工作的纯文本源代码PDF示例？

问题描述：

我刚刚找到了 Adobe论坛：简单文字字串范例中的规格破碎，因此我有兴趣找到纯文本源代码PDF示例。

I just found the post Adobe Forums: Simple Text String Example in specification broken., so I got interested in finding plain-text source code PDF examples.

所以，通过那篇文章，我终于找到了：

So, through that post, I eventually found:

a href =http://www.adobe.com/devnet/pdf/pdf_reference.html =nofollow> PDF参考和Adobe扩展到PDF规范| Adobe开发人员连接;其中包含：
- PDF 文档管理 - 可移植文档格式 - 第1部分：PDF 1.7，第一版（PDF32000_2008.pdf）
- The webpage PDF Reference and Adobe Extensions to the PDF Specification | Adobe Developer Connection ; which contains:
  - The PDF Document Management – Portable Document Format – Part 1: PDF 1.7, First Edition (PDF32000_2008.pdf)
  PDF 1.7规格在第699页附录_Annex H（informative）PDF档案范例;并从那里，我想尝试H.3简单文本字符串示例（经典Hello World）。
  
  The PDF 1.7 spec has on page 699 appendix "_Annex H (informative) Example PDF files"; and from there, I wanted to try "H.3 Simple Text String Example" (the "classic Hello World").
  
  所以我试图将它保存为 hello.pdf （_except注意，当您从PDF32000_2008.pdf，您可能会得到％PDF-1。4 - 即在 1。 be removed_）：
  
  So I tried to save this as hello.pdf (_except note when you copy from the PDF32000_2008.pdf, you may get "%PDF-1. 4" - that is, a space inserted after 1., which must be removed_) :
```
%PDF-1.4
1 0 obj
  << /Type /Catalog
      /Outlines 2 0 R
      /Pages 3 0 R
  >>
endobj

2 0 obj
  << /Type /Outlines
      /Count 0
  >>
endobj

3 0 obj
  << /Type /Pages
      /Kids [ 4 0 R ]
      /Count 1
  >>
endobj

4 0 obj
  << /Type /Page
      /Parent 3 0 R
      /MediaBox [ 0 0 612 792 ]
      /Contents 5 0 R
      /Resources << /ProcSet 6 0 R
      /Font << /F1 7 0 R >>
  >>
>>
endobj

5 0 obj
  << /Length 73 >>
stream
  BT
    /F1 24 Tf
    100 100 Td
    ( Hello World ) Tj
  ET
endstream
endobj
```
  ...我正尝试打开它：
  
  ... and I'm trying to open it:
```
evince hello.pdf
```
  ...但是，evince无法打开它：无法打开文档/ PDF文档已损坏;还有：
  
  ... however, evince cannot open it: "Unable to open document / PDF document is damaged"; and also:
```
Error: PDF file is damaged - attempting to reconstruct xref table...
Error: Couldn't find trailer dictionary
Error: Couldn't read xref table
```
  a href =http://qpdf.sourceforge.net/files/qpdf-manual.html =nofollow> qpdf ：
  
  I also check with qpdf:
```
$ qpdf --check hello.pdf
WARNING: hello.pdf: file is damaged
WARNING: hello.pdf: can't find startxref
WARNING: hello.pdf: Attempting to reconstruct cross-reference table
hello.pdf: unable to find trailer dictionary while recovering damaged file
```
  我在哪里出错？
  
  非常感谢任何答案，
  
  干杯！
  
  Many thanks in advance for any answers,
  Cheers!

答

您应该在（语法正确的） xref 和 trailer 文件。这意味着：PDF中的每个对象在外部参照表中都需要一行，即使字节偏移没有正确说明。然后Ghostscript，pdftk或qpdf可以重新建立正确的外部参照并渲染文件：

You should append a (syntactically correct) xref and trailer section to the end of the file. That means: each object in your PDF needs one line in the xref table, even if the byte offset isn't correctly stated. Then Ghostscript, pdftk or qpdf can re-establish a correct xref and render the file:

[...]
endobj
xref 
0 8 
0000000000 65535 f 
0000000010 00000 n 
0000000020 00000 n 
0000000030 00000 n 
0000000040 00000 n 
0000000050 00000 n 
0000000060 00000 n 
0000000070 00000 n 
trailer 
<</Size 8/Root 1 0 R>> 
startxref 
555 
%%EOF

如何生成在文档查看器中工作的纯文本源代码PDF示例？

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