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

VOIP quote for Cat Soft LLC; Removing Lowers; Mnesiacs; [Maths, Link] Dividing By Zero; [Book, Review] Ray Monk - Ludwig Wittgenstein: The Duty Of Genius; [Link, Bike, Computing] Evolving Lacing Patterns; [Jam] Strawberry and Orange Jam; [Chile, Privacy] Biometric Check During Mail Delivery; [Link, Chile, Spanish] Article on the Chilean Drought; [Bike] Extended Gear Ratios, Shimano XT M8000 (24/36 Chainring); Get Coffee Quotes for Cat Soft LLC; [Link, Politics, USA] The Future Of American Democracy; Mass Hysteria; [Review, Books, Links] Kazuo Ishiguro - Never Let Me Go; [Link, Books] David Mitchell's Favourite Japanese Fiction; [Link, Bike] Rear Suspension Geometry; [Link, Cycling, Art] Strava Artwork; [Link, Computing] Useful gcc flags; [Link] Voynich Manuscript Decoded; [Bike] Notes on Servicing Suspension Forks; [Links, Computing] Snap, Flatpack, Appimage; [Link, Computing] Oracle is leaving Java (to die); [Link, Politics] Cubans + Ultrasonics; [Book, Link] Laurent Binet; VirtualBox; [Book, Link] No One's Ways; [Link] The Biggest Problem For Cyclists Is Bad Driving; [Computing] Doxygen, Sphinx, Breathe; [Admin] Brokw Recent Permalinks; [Bike, Chile] Buying Bearings in Santiago; [Computing, Opensuse] Upgrading to 42.3; [Link, Physics] First Support for a Physics Theory of Life; [Link, Bike] Peruvian Frame Maker; [Link] Awesome Game Theory Tit-For-Tat Thing; [Food, Review] La Fabbrica - Good Italian Food In Santiago; [Link, Programming] MySQL UTF8 Broken; [Link, Books] Latin American Authors; [Link, Computing] Optimizatin Puzzle; [Link, Books, Politics] Orwell Prize; [Link] What the Hell Is Happening With Qatar?; [Link] Deep Learning + Virtual Tensor Machines; [Link] Scaled Composites: Largest Wingspan Ever; [Link] SCP Foundation; [Bike] Lessons From 2 Leading 2 Trailing; [Link] Veg Restaurants in Santiago; [Link] List of Contemporary Latin American Authors; [Bike] FTHR; [Link] Whoa - NSA Reduces Collection (of US Residents); [Link] Red Bull's Breitbart; [Link] Linux Threads; [Link] Punycode; [Link] Bull / Girl Statues on Wall Street; [Link] Beautiful Chair Video; Update: Lower Pressures; [Link] Neat Python Exceptions; [Link] Fix for Windows 10 to Avoid Ads; [Link] Attacks on ZRTP; [Link] UK Jazz Invasion; [Review] Cuba; [Link] Aricle on Gender Reversal of US Presidential Debate; {OpenSuse] Fix for Network Offline in Updater Applet; [Link] Parkinson's Related to Gut Flora; Farellones Bike Park; [Meta] Tags; Update: Second Ride; Schwalbe Thunder Burt 2.1 v Continental X-King 2.4; Mountain Biking in Santiago; Books on Ethics; Security Fail from Command Driven Interface; Everything Old is New Again; Interesting Take on Trump's Lies; Chutney v6; References on Entropy; Amusing "Alexa.." broadcast; The Shame of Chile's Education System; Playing mp4 gifs in Firefox on Opensuses Leap 42.2; Concurrency at Microsoft; Globalisation: Uk -> Chile; OpenSuse 42.2 and Synaptics Touch-Pads; Even; Cherry Jam; Lebanese Writer Amin Maalouf; C++ - it's the language of the future; Learning From Trump; Chinese Writer Hu Fayun; And; Apricot Jam; Also; Excellent Article on USA Politics; Oh Metafilter; Prejudice Against The Rurals; Also, Zizek; Trump; Why Trump Won; Doxygen + Latex on CentOS 6; SMASH - Solve 5 Biggest Problems in Physics; Good article on racism, brexit, and social divides; Grandaddy are back!; Consciousness From Max Entropy; Democrats; Harvard Will Fix Black Poverty

© 2006-2017 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: chris marx <chrismarx@...>

Date: Mon, 16 Nov 2009 22:25:40 -0500

", 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!!!!!!

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