| Andrew Cooke | Contents | Latest | RSS | Twitter | Previous | Next

C[omp]ute

Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

Personal Projects

Lepl parser for Python.

Colorless Green.

Photography around Santiago.

SVG experiment.

Professional Portfolio

Calibration of seismometers.

Data access via web services.

Cache rewrite.

Extending OpenSSH.

C-ORM: docs, API.

Last 100 entries

UNUMS (Universal Number Format); MOOCs (Massive Open Online Courses); Interesting Looking Game; Euler's Theorem for Polynomials; Weeks 3-6; Reddit Comment; Differential Cryptanalysis For Dummies; Japanese Graphic Design; Books To Be Re-Read; And Today I Learned Bugs Need Clear Examples; Factoring a 67 bit prime in your head; Islamic Geometric Art; Useful Julia Backtraces from Tasks; Nothing, however, is lost with less discomfort than that which, when lost, cannot be missed; Article on Didion; Cost of Living by City; British Slavery; Derrida on Metaphor; African SciFi; Traits in Julia; Alternative Japanese Lit; Pulic Key as Address (Snow); Why Information Grows; The Blindness Of The Chilean Elite; Some Victoriagate Links; This Is Why I Left StackOverflow; New TLS Implementation; Maths for Physicists; How I Am 8; 1000 Word Philosophy; Cyberpunk Reading List; Detailed Discussion of Message Dispatch in ParserCombinator Library for Julia; FizzBuzz in Julia w Dependent Types; kokko - Design Shop in Osaka; Summary of Greece, Currently; LLVM and GPUs; See Also; Schoolgirl Groyps (Maths); Japanese Lit; Another Example - Modular Arithmetic; Music from United; Python 2 and 3 compatible alternative.; Read Agatha Christie for the Plot; A Constructive Look at TempleOS; Music Thread w Many Recommendations; Fixed Version; A Useful Julia Macro To Define Equality And Hash; k3b cdrom access, OpenSuse 13.1; Week 2; From outside, the UK looks less than stellar; Huge Fonts in VirtualBox; Keen - Complex Emergencies; The Fallen of World War II; Some Spanish Fiction; Calling C From Fortran 95; Bjork DJ Set; Z3 Example With Python; Week 1; Useful Guide To Starting With IJulia; UK Election + Media; Review: Reinventing Organizations; Inline Assembly With Julia / LLVM; Against the definition of types; Dumb Crypto Paper; The Search For Quasi-Periodicity...; Is There An Alternative To Processing?; CARDIAC (CARDboard Illustrative Aid to Computation); The Bolivian Case Against Chile At The Hague; Clear, Cogent Economic Arguments For Immigration; A Program To Say If I Am Working; Decent Cards For Ill People; New Photo; Luksic And Barrick Gold; President Bachelet's Speech; Baltimore Primer; libxml2 Parsing Stream; configure.ac Recipe For Library Path; The Davalos Affair For Idiots; Not The Onion: Google Fireside Chat w Kissinger; Bicycle Wheels, Inertia, and Energy; Another Tax Fraud; Google's Borg; A Verion That Redirects To Local HTTP Server; Spanish Accents For Idiots; Aluminium Cans; Advice on Spray Painting; Female View of Online Chat From a Male; UX Reading List; S4 Subgroups - Geometric Interpretation; Fucking Email; The SQM Affair For Idiots; Using Kolmogorov Complexity; Oblique Strategies in bash; Curses Tools; Markov Chain Monte Carlo Without all the Bullshit; Email Para Matias Godoy Mercado; The Penta Affair For Idiots; Example Code To Create numpy Array in C; Good Article on Bias in Graphic Design (NYTimes); Do You Backup github?; Data Mining Books

© 2006-2015 Andrew Cooke (site) / post authors (content).

Matching Clean URLs with Tomcat/Spring

From: "andrew cooke" <andrew@...>

Date: Sat, 11 Feb 2006 16:50:37 -0300 (CLST)

Martini in the Spring forums has done a huge amount of work trying to
clear up some confusion I (and at least one other person) had about
matching "any" URL - the root of the problem being that finally you render
the page with a jsp page, which itself is dispatched by Tomcat (and so
matches the "any" servlet, looping or crashig).

The thread starts at
http://forum.springframework.org/showthread.php?t=21840 but the answer is
at the end of this comment (page 2) -
http://forum.springframework.org/showpost.php?p=50421&postcount=20

  Anyways, I tried copy/pasting this configuration over to my own web.xml.
  But that didn't work too well, as it seems "/*" has higher precedence
  than "*.jsp". So I took a new look at the Servlet spec, only to find out
  that the "default pattern" is "/", not "/*". I changed DispatcherServlet's
  mapping from /* to just /, and then it worked. Out of curiousity, I then
  removed the explicit *.jsp mapping (to Jasper's JspServlet) to see if that
  would work as well. And it did.

Andrew

Rewriting Filter

From: "andrew cooke" <andrew@...>

Date: Sat, 11 Feb 2006 22:31:58 -0300 (CLST)

In the same thred, Dave Hewitt posted a link to this rewriter -
http://tuckey.org/urlrewrite/

Now that I finally understand what's happening, that does indeed look like
the best solution.

Final Tomcat/Spring/UrlRewriter Configuration

From: "andrew cooke" <andrew@...>

Date: Sun, 12 Feb 2006 10:41:00 -0300 (CLST)

OK, this seems to be the best way to get clean URLs with Tomcat and Spring:


urlrewrite.xml

<urlrewrite>
  <rule>
    <note>any url without a final file name goes to index</note>
    <from>^([^?]*)/(\?.*)?$</from>
    <to last="false">$1/index$2</to>
  </rule>
  <rule>
    <note>any url without a final file extension goes to .dynamic</note>
    <from>^([^?]*)/([^?/\.]+)(\?.*)?$</from>
    <to last="false">$1/$2.dynamic$3</to>
  </rule>
</urlrewrite>


web.xml (simplified)

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
  version="2.4">

  <filter>
    <filter-name>UrlRewriteFilter</filter-name>
    <filter-class>
       org.tuckey.web.filters.urlrewrite.UrlRewriteFilter
    </filter-class>
    <init-param>
      <param-name>logLevel</param-name>
      <param-value>DEBUG</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>UrlRewriteFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <servlet>
    <servlet-class>
      org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <url-pattern>*.dynamic</url-pattern>
  </servlet-mapping>

</web-app>


Code used to generate value of current form (for referencing in JSP):

public class InitialUrlInterceptor extends HandlerInterceptorAdapter {

  private String dropPostfix = ".dynamic";

  public void setDropPostfix(String dropPostfix) {
    this.dropPostfix = dropPostfix;
  }

  @Override
  public boolean preHandle(HttpServletRequest req,
                           HttpServletResponse res,
                           Object handler) {
    String path = SessionUtils.getRelativePath(req);
    if (path.endsWith(dropPostfix))
      path = path.substring(0, path.length() - dropPostfix.length());
    req.setAttribute("requestUrl", path);
    return true;
  }

}

tomcat default servlet patten matching -- thank you!

From: andrew cooke <andrew@...>

Date: Thu, 28 Jan 2010 00:48:29 -0300

[Sorry for the delay in approving this]

Date: Mon, 16 Nov 2009 22:25:40 -0500
From: chris marx <chrismarx@...>

  [...] ", as it seems "/*" has higher precedence
  than "*.jsp". So I took a new look at the Servlet spec, only to find out
  that the "default pattern" is "/", not "/*"."

brilliant thanks so much for posting this saved me so much time!!!!!!

Comment on this post