At Seravia, we're building a web based legal service using ruby/rails. In this talk, we'll go over how we solve several problems around generating legal contracts, digitally signing them, and storing them.

1. LEGAL DOCUMENTS 2.0 LEGAL DOCUMENTS 2.0 by Peng Zuo by PENG ZUO SERAVIA.COM December 19, 2009 Beware of bugs in the above code; I have only proved it correct, not tried it. - Donald Knuth

2. LEGAL DOCUMENTS 2.0 by Peng Zuo THE LAWYER

3. LEGAL CONTRACTS LEGAL DOCUMENTS 2.0 by Peng Zuo http://seravia.com/research/company-setup/legal-contracts-2-0 Paper Digital

4. LaTeX & TeX Document markup language for the TeX typesetting program TeX created by Don Knuth High quality typesetting Standard for technical fields “ Cross-browser compatibility” TeX on version 3.1415926 Free LEGAL DOCUMENTS 2.0 by Peng Zuo

5. LaTeX PARTIALS Similar to HTML partials Lawyers create the partial templates System combines TeX files and evaluates all variables Generate pdf from final TeX file LEGAL DOCUMENTS 2.0 by Peng Zuo

6. LaTeX PARTIALS tex document: ocumentclass[12pt]{article} sepackage{amsmath} itle{aTeX} ate{} egin{document} aketitle [[partial1]] [[partial2]] nd{document} partial1: aTeX{} is a [[x]] for the eX{} typesetting program. It offers programmable desktop publishing features and extensive facilities for automating most aspects of typesetting and desktop publishing, including numbering and cross-referencing, tables and figures, page layout, bibliographies, and much more. aTeX{} was originally written in [[y]] by [[z]] and has become the dominant method for using eX; few people write in plain eX{} anymore. The current version is aTeXe. partial2: egin{align} E &= mc^2 m &= rac{m_0}{qrt{1-rac{v^2}{c^2}}} nd{align} variables: x = "document preparation system" y = 1984 z = "Leslie Lamport" LEGAL DOCUMENTS 2.0 by Peng Zuo

7. RTeX http://rtex.rubyforge.org RTeX::Document.new(latex_content,{:preprocessor => 'pdflatex', :preprocess => true, :processor => 'pdflatex'} LEGAL DOCUMENTS 2.0 by Peng Zuo

8. DELAYED BackgroundRB Nanite Delayed Job LEGAL DOCUMENTS 2.0 by Peng Zuo

9. LEGAL DOCUMENTS 2.0 by Peng Zuo 然后 ?

10. DIGITAL SIGNATURES OpenSSL (openssl.org) Signer Authentication Document Authentication http://seravia.com/research/technology/digital-signatures LEGAL DOCUMENTS 2.0 by Peng Zuo The Problem

11. DIGITAL SIGNATURES LEGAL DOCUMENTS 2.0 by Peng Zuo

12. LEGAL DOCUMENTS 2.0 by Peng Zuo 有些时候 ...

13. LEGAL DOCUMENTS 2.0 by Peng Zuo

14. LEGAL DOCUMENTS 2.0 by Peng Zuo SEND HELP

15. iText Open source library for creating and manipulating pdf files Java LEGAL DOCUMENTS 2.0 by Peng Zuo

16. iText LEGAL DOCUMENTS 2.0 by Peng Zuo Before Filled After Filled

17. RJB – RUBY JAVA BRIDGE Ruby Java LEGAL DOCUMENTS 2.0 by Peng Zuo ?

18. RJB – RUBY JAVA BRIDGE Ruby Java LEGAL DOCUMENTS 2.0 by Peng Zuo 必须把所有代码运行在 JRuby 上

19. RJB – RUBY JAVA BRIDGE LEGAL DOCUMENTS 2.0 by Peng Zuo Ruby Java 在 Ruby 代码里直接调用 Java Library RJB

20. RJB – RUBY JAVA BRIDGE LEGAL DOCUMENTS 2.0 by Peng Zuo require 'rjb' str = Rjb::import('java.lang.String') instance = str.new "test" instance.toString #=> "test"

21. RJB – RUBY JAVA BRIDGE LEGAL DOCUMENTS 2.0 by Peng Zuo load_path = File.join(RAILS_ROOT,"iText-2.1.7.jar") Rjb::load load_path Rjb::import ... #import java package Have “fun” with iText!

22. LEGAL DOCUMENTS 2.0 by Peng Zuo STORAGE Simple Secure Speedy S3 Persistence is always a problem.

23. PAPERCLIP LEGAL DOCUMENTS 2.0 by Peng Zuo http://github.com/thoughtbot/paperclip PAPERCLIP

24. SUMMARY LEGAL DOCUMENTS 2.0 by Peng Zuo pdf (rtex, iText, rjb, paperclip, s3) Digital signatures (openSSL) delayed_job, fax TeX/LaTeX