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  • htaccess not properly rewriting urls

    - by Cameron Ball
    This is a bit of a weird one. I'm doing some work on a server, and I need rewrite rules for directories that actually exist (in some cases, they are more than one level deep) At the moment my .htaccess looks like this: RewriteEngine on RewriteRule ^simfiles/([-\ a-zA-Z0-9:/]+)$ http://mydomain.com/?portal=simfiles&folder=$1 [L] And this is working OK, for example, a url like: mydomain.com/sifmiles/my-files Will get redirected to mydomain.com/?portal=simfiles&folder=my-files Or in the case of a directory structure that is deeper than one level: mydomain.com/sifmiles/my-files/more-of-my-files Will get redirected to mydomain.com/?portal=simfiles&folder=my-files/more-of-my-files I wrote the regex so that it won't match things with a . in the path, because there are css and js files which reside in simfiles/somedirectory, and if I redirect everything then these cannot be loaded. I tried a configuration like this: RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^simfiles/([-\ a-zA-Z0-9:/\.]+)$ http://mydomain.com/?portal=simfiles&folder=$1 [L] But that doesn't work, things still don't load properly. So my first question is, how can I achieve this "properly"? I don't like my solution because it means redirects won't occur if the folder has a . in its name. My second problem, is that while the redirection is happening properly, the url becomes: http://mydomain.com/?portal=simfiles&folder=my-files I want the URL to remain clean, like: http://mydomain.com/sifmiles/my-files How can I achieve this?

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  • Redirect 404 errors without rewriting the URL

    - by Knocks X
    Is it possible to have an erroneous URL remain in the address bar while redirecting the user to a URL within my domain? I want www.domain.com/forum to be the actual site being served in all 404 circumstances but I don't want the referring URL to be rewritten (other than the domain portion, which is being done on the registrar level). This is my current .htaccess RewriteEngine On RedirectMatch permanent ^/$ http://www.domain.com/forum/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule .* http://www.domain.com/forum/ [L,R]

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  • URL Rewriting Problem

    - by Eray
    I'm trying to rewrite my URL's subdomain. http://username.domain.com will show content of http://www.domain.com/user.php?u=username but URL stay as http://username.domain.com . (I mean url masking) (Username's can contain a-z 0-9 and hypens) Also if subdomain is www or api, don't redirect them I'm using this for my .htaccess RewriteEngine on RewriteCond %{REQUEST_URI} !^/index\.php$ RewriteCond %{HTTP_HOST} !^www\.domain\.com RewriteCond %{HTTP_HOST} ^([^.]+)\.domain\.com RewriteRule .* /user.php?u=%1 [L] (After @mfarver's advice) I'm trying this RewriteEngine on RewriteRule .* /user.php?u=%1 [L] but this time getting 500 Internal Server error: [Mon May 30 20:10:44 2011] [alert] [client 81.6.xx.xxx] /home/blablabla/public_html/.htaccess: AllowOverride not allowed here (from error log) My server's httpd.conf file's virtualhost settings <VirtualHost 109.73.70.169:80> <IfModule mod_userdir.c> UserDir disabled UserDir enabled USERNAME </IfModule> <IfModule concurrent_php.c> php4_admin_value open_basedir "/home/USERNAME/:/usr/lib/php:/usr/php4/lib/php:/usr/local/lib/php:/usr/local/php4/lib/php:/tmp" php5_admin_value open_basedir "/home/USERNAME/:/usr/lib/php:/usr/local/lib/php:/tmp" </IfModule> <IfModule !concurrent_php.c> <IfModule mod_php4.c> php_admin_value open_basedir "/home/USERNAME/:/usr/lib/php:/usr/php4/lib/php:/usr/local/lib/php:/usr/local/php4/lib/php:/tmp" </IfModule> <IfModule mod_php5.c> php_admin_value open_basedir "/home/USERNAME/:/usr/lib/php:/usr/local/lib/php:/tmp" </IfModule> <IfModule sapi_apache2.c> php_admin_value open_basedir "/home/USERNAME/:/usr/lib/php:/usr/php4/lib/php:/usr/local/lib/php:/usr/local/php4/lib/php:/tmp" </IfModule> </IfModule> ServerName DOMAIN.net ServerAlias *.DOMAIN.net <Directory "/home/USERNAME/public_html"> Options FollowSymLinks Allow from all AllowOverride All </Directory> DocumentRoot /home/USERNAME/public_html ServerAdmin [email protected] UseCanonicalName Off CustomLog /usr/local/apache/domlogs/DOMAIN.net combined CustomLog /usr/local/apache/domlogs/DOMAIN.net-bytes_log "%{%s}t %I .\n%{%s}t %O ." ## User USERNAME # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup USERNAME USERNAME </IfModule> <IfModule !mod_disable_suexec.c> SuexecUserGroup USERNAME USERNAME </IfModule> ScriptAlias /cgi-bin/ /home/USERNAME/public_html/cgi-bin/ # To customize this VirtualHost use an include file at the following location # Include "/usr/local/apache/conf/userdata/std/2/USERNAME/DOMAIN.net/*.conf" </VirtualHost> Also *.DOMAIN.net added to my DNS ZONES as A record.

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  • Rewriting URLs from subdomain to domain in Apache

    - by Nazgulled
    Hi, My webserver is running Plesk and part of my site structure goes like this: / /httpdocs (domain root folder, URL: http://www.domain.com) /subdomains /subdomains/blog/httpdocs (blog root folder, URL: http://blog.domain.com) I have a WordPress installation in the domain root folder and WP is configured to display a static page when accessing www.domain.com and to display the blog when accessing www.domain.com/blog. However, I want to redirect (using mod_rewrite) all requests from http://blog.domain.com/ to http://www.domain.com/blog/. A few examples: Accessing http://blog.domain.com/archives should access http://www.domain.com/blog/archives/ Accessing http://blog.domain.com/tag/abc should access http://www.domain.com/blog/tag/abc/ Accessing http://blog.domain.com/some-post-title should access http://www.domain.com/blog/some-post-title All this should be transparent to the user, the address shouldn't be changed on the browser's address bar. In better words, I want a URL rewrite and not a URL redirect. Is this achievable with mod_rewrite? Can anyone help me with the .htaccess? All my attempts on doing so have failed...

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  • Nginx: Rewriting entire URI to query string

    - by Doug
    Still pretty new to nginx here, trying to get a simple rewrite to work, but the server just responds '404 not found' My server block server { listen 80; listen [::]:80; server_name pics.example.com; root /home/pics; rewrite ^(.*)$ index.php?tag=$1; location / { try_files $uri $uri/ $uri.php /index.html $uri =404; #try_files $uri =404; fastcgi_split_path_info ^([a-z]+)(/.+)$; include fastcgi_params; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_pass unix:/tmp/php5-fpm.sock; fastcgi_index index.php; } location /doc/ { alias /usr/share/doc/; autoindex on; allow 127.0.0.1; deny all; } } pics.example.com/foobear should rewrite to pics.example.com/index.php?tag=foobear

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  • Rewriting html links with modproxyperlhtml

    - by Juancho
    I'm trying to setup an Apache reverse proxy using mod_proxy and modproxyperlhtml. This is my scenario: Domain for the proxy: http : // www.myserver.com/ Destination server (the one behind the proxy): http : // myserver.foo.com/myapp/ I'm sorry that I have to space the URL but serverfault doesn't allow me to post more than two links as "spam protection mechanism" (ridiculous on a site where you ask questions about servers and it's really probable to post more than two times the same URL's to explain your question). The idea is to map http : // www.myserver.com/ to http : // myserver.foo.com/myapp/ . Note that the path on the proxy is / and on the destination server is /myapp/. All of the examples I can find on the net (like the one on the official documentation of modproxyperlhtml) are the other way around, ie. path on the proxy /myapp/ and path on the destination server /. This is my current config that doesn't work: ProxyPass / http : // myserver.foo.com/myapp/ ProxyPassReverse / http : // myserver.foo.com/myapp/ PerlInputFilterHandler Apache2::ModProxyPerlHtml PerlOutputFilterHandler Apache2::ModProxyPerlHtml SetHandler perl-script PerlSetVar ProxyHTMLVerbose "On" LogLevel Info <Location / > # ProxyPassReverse /myapp/ PerlAddVar ProxyHTMLURLMap "/myapp/ /" PerlAddVar ProxyHTMLURLMap "http : // myserver.foo.com /" </Location> The examples use the ProxyPassReverse inside the Location directive, but on my case doesn't work, only when outside. With this configuration the links aren't being replaced as they should be, my guess is that the location isn't being found, thus the rewrite rules aren't being applied. The error log only shows that it uncompresses the content, searches it but doesn't find anything: [Tue Nov 13 0842:05 2012] [warn] [ModProxyPerlHtml] Uncompressing text/html; charset=UTF-8, Content-Encoding: gzip\n [Tue Nov 13 08:42:05 2012] [warn] [ModProxyPerlHtml] Content-type 'text/html; charset=UTF-8' match: /(text\\/javascript|text\\/html|text\\/css|text\\/xml|application\\/.*javascript|application\\/.*xml)/is\n [Tue Nov 13 08:42:05 2012] [warn] [ModProxyPerlHtml] Compressing output as Content-Encoding: gzip\n [Tue Nov 13 08:42:06 2012] [warn] [ModProxyPerlHtml] Content-type 'text/html; charset=UTF-8' match: /(text\\/javascript|text\\/html|text\\/css|text\\/xml|application\\/.*javascript|application\\/.*xml)/is\n What could be wrong ?

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  • Address Rewriting and Masquerading postfix

    - by Shalini Tripathi
    This is header of mail that i have received from mailchimp: Return-Path: bounce-mc.us2_6034522.1358370-achal.tomar58=gmail.com@mail76.us2.mcsv.net> Received: from mail76.us2.mcsv.net (mail76.us2.mcsv.net. [173.231.139.76]) by mx.google.com with ESMTP id er6si2501863qab.62.2012.06.03.05.09.29; Sun, 03 Jun 2012 05:09:29 -0700 (PDT) My query is how they add the received from header to the Return-Path dyanamically,i also want to implement the same in my mail server,i have tried address masquereading in postfix but it was not of much help may be i am misssing something. My mail server has postfix as an MTA and i have centOs 5 as an OS.

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  • Rewriting Apache URLs to use only paths and set response headers

    - by jabley
    I have apache httpd in front of an application running in Tomcat. The application exposes URLs of the form: /path/to/images?id={an-image-id} The entities returned by such URLs are images (even though URIs are opaque, I find human-friendly ones are easier to work with!). The application does not set caching directives on the image response, so I've added that via Apache. # LocationMatch to set caching directives on image responses <LocationMatch "^/path/to/images$"> # Can't have Set-Cookie on response, otherwise the downstream caching proxy # won't cache! Header unset Set-Cookie # Mark the response as cacheable. Header append Cache-Control "max-age=8640000" </LocationMatch> Note that I can't use ExpiresByType since not all images served by the app have versioned URIs. I know that ones served by the /path/to/images resource handler are versioned URIs though, which don't perform any sort of content negotiation, and thus are ripe for Far Future Expires management. This is working well for us. Now a requirement has come up to put something else in front of the app (in this case, Amazon CloudFront) to further distribute and cache some of the content. Amazon CloudFront will not pass query string parameters through to my origin server. I thought I would be able to work around this, by changing my apache config appropriately: # Rewrite to map new Amazon CloudFront friendly URIs to the application resources RewriteRule ^/new/path/to/images/([0-9]+) /path/to/images?id=$1 [PT] # LocationMatch to set caching directives on image responses <LocationMatch "^/path/to/images$"> # Can't have Set-Cookie on response, otherwise the downstream caching proxy # won't cache! Header unset Set-Cookie # Mark the response as cacheable. Header append Cache-Control "max-age=8640000" </LocationMatch> This works fine in terms of serving the content, but there are no longer caching directives with the response. I've tried playing around with [PT], [P] for the RewriteRule, and adding a new LocationMatch directive: # Rewrite to map new Amazon CloudFront friendly URIs to the application resources # /new/path/to/images/12345 -> /path/to/images?id=12345 RewriteRule ^/new/path/to/images/([0-9]+) /path/to/images?id=$1 [PT] # LocationMatch to set caching directives on image responses <LocationMatch "^/path/to/images$"> # Can't have Set-Cookie on response, otherwise the downstream caching proxy # won't cache! Header unset Set-Cookie # Mark the response as cacheable. Header append Cache-Control "max-age=8640000" </LocationMatch> <LocationMatch "^/new/path/to/images/"> # Can't have Set-Cookie on response, otherwise the downstream caching proxy # won't cache! Header unset Set-Cookie # Mark the response as cacheable. Header append Cache-Control "max-age=8640000" </LocationMatch> Unfortunately, I'm still unable to get the Cache-Control header added to the response with the new URL format. Please point out what I'm missing to get /new/path/to/images/12345 returning a 200 response with a Cache-Control: max-age=8640000 header. Pointers as to how to debug apache like this would be appreciated as well!

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  • Nginx Tries to download file when rewriting non-existent url

    - by Vince Kronlein
    All requests to a non-existent file should be re-written to index.php?name=$1 All other requests should be processed as normal. With this server block, the server is trying to download all non-existent urls: server { server_name www.domain.com; rewrite ^(.*) http://domain.com$1 permanent; } server { listen 80; server_name domain.com; client_max_body_size 500M; index index.php index.html index.htm; root /home/username/public_html; location ~ /\.ht { deny all; } location ~ \.php$ { try_files $uri = 404; fastcgi_split_path_info ^(.+\.php)(/.+)$; include fastcgi_params; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_pass 127.0.0.1:9002; } location ~* ^.+\.(ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|rss|atom|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$ { access_log off; log_not_found off; expires max; } location /plg { } location / { if (!-f $request_filename){ rewrite ^(.*)$ /index.php?name=$1 break; } } } I've checked to see that my default_type = text/html instead of octet stream, not sure what the deal is.

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  • Drupal + Lighttpd: enabling clean urls (rewriting)

    - by Patrick
    I'm emulating Ubuntu on my mac, and I use it as a server. I've installed lighttpd + Drupal and the following configuration section requires a domain name in order to make clean urls to work. Since I'm using a local server I don't have a domain name and I was wondering how to make it work given the fact the ip of the local machine is usually changing. thanks $HTTP["host"] =~ "(^|\.)mywebsite\.com" { server.document-root = "/var/www/sites/mywebsite" server.errorlog = "/var/log/lighttpd/mywebsite/error.log" server.name = "mywebsite.com" accesslog.filename = "/var/log/lighttpd/mywebsite/access.log" include_shell "./drupal-lua-conf.sh mywebsite.com" url.access-deny += ( "~", ".inc", ".engine", ".install", ".info", ".module", ".sh", "sql", ".theme", ".tpl.php", ".xtmpl", "Entries", "Repository", "Root" ) # "Fix" for Drupal SA-2006-006, requires lighttpd 1.4.13 or above # Only serve .php files of the drupal base directory $HTTP["url"] =~ "^/.*/.*\.php$" { fastcgi.server = () url.access-deny = ("") } magnet.attract-physical-path-to = ("/etc/lighttpd/drupal-lua-scripts/p-.lua") }

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  • Rewriting to address on postfix local aliases

    - by Wade Williams
    I was running into the common problem that mail for "root" on my system was having $mydomain appended, and because $mydomain is not in $mydestination, the mail was being sent to our central mail server as "root@domain." I cannot add $mydomain to $mydestination, because if I understand it correctly, that would mean all mail addressed to $mydomain would be looked up locally, and if an alias does not exist, delivery would fail. So, I followed these instructions: Delivering some, but not all accounts locally which seems to have resolved the problem. Mail for "root" is now expanded according to /etc/aliases and delivered to the non-local address I desire. The one oddity however is that the "To:" address still reads "root@domain." Is there any way I can get the "To" address to be the one that the alias directed its delivery? So for example, if my alias says that mail for "root" should go to "hostname-admin@domain" is there any way the "To" address can be rewritten as "hostname-admin@domain?" Currently it still shows as "root@domain."

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  • Apache URL rewriting in reverse proxy

    - by Jeremy Gooch
    I'm deploying Apache in front of a Karaf-hosted application (Apache and Karaf are on separate servers). I want Apache to operate as a reverse proxy and also to hide part of the URL. The URL to get the log-in page of the application directly from the app server is http://app-server:8181/jellyfish. Pages are served by the Jetty instance running within Karaf. Of course, this behaviour would usually be blocked by the firewall for everything except the reverse proxy server. With the firewall off, if you hit this URL then Jetty loads the log-in page. The browser's address bar correctly changes to http://app-server:8181/jellyfish/login?0 and everything works. What I want is for http://web-server (i.e. from the root) to map to Jetty on the app server with the name of the app (jellyfish) suppressed. e.g. The browser would change to show http://web-server/login?0 in the address bar and all subsequent URLs and content would be served with the web-server's domain and without the jellyfish clutter. I can get Apache to operate as a simple reverse proxy, using the following config (snippet):- ProxyPass /jellyfish http://app-server:8181/jellyfish ProxyPassReverse / http://app-server:8181/ ...but this requires the browser's URL to contain jellyfish and going to the root URL (http://web-server) gives a 404 Not Found. I've spent a lot of time trying to use mod_rewrite with and without its [P] flag to get around this, but without success. I then tried the ProxyPassMatch directive, but I can't seem to get that quite correct either. Here's the current config, as is loaded into /etc/apache2/sites-available/ on the web server. Note that there is a locally-hosted images directory. I've also kept the mod_rewrite proxy exploit protection and am suppressing a couple of mod_security rules that were giving false positives. <VirtualHost *:80> ServerAdmin admin@drummer-server ServerName drummer-server ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /images/ "/var/www/images/" RewriteEngine On RewriteCond %{REQUEST_URI} !^$ RewriteCond %{REQUEST_URI} !^/ RewriteRule .* - [R=400,L] ProxyPass /images ! ProxyPassMatch ^/(.*) http://granny-server:8181/jellyfish/$1 ProxyPassReverse / http://granny-server:8181/jellyfish ProxyPreserveHost On SecRuleRemoveById 981059 981060 <Directory "/var/www/images"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order allow,deny Allow from all </Directory> </VirtualHost> If I go to http://web-server, I get redirected to http://web-server/jellyfish/home but this gives a 404, with a complaint about trying to access /jellyfish/jellyfish/home - NB the browser's address bar does not contain the double /jellyfish. HTTP ERROR 404 Problem accessing /jellyfish/jellyfish/home. Reason: Not Found And, if I go to http://web-server/login, I get redirected to http://web-server/jellyfish/login?0 but this gives a 404, with a complaint about trying to access /jellyfish/jellyfish/login. HTTP ERROR 404 Problem accessing /jellyfish/jellyfish/login. Reason: Not Found So, I'm guessing I'm somehow passing through the rules twice. I am also slightly bemused as to where the home bit of the URL comes from in the first example. Can someone point me in the right direction, please? Thanks, J.

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  • Address rewriting postfix

    - by ACHAL
    I am using CentOs5 and postfix as an MTA for my server. My situation is as follows:- I have a mail server through which Php applications connect and send mails to the destination addresses. The problem is that the the application servers do not have spf/dkim record set up and my server which actually relays the mails to the network has spf/dkim records. So i want the mail sent by an application having a return address:[email protected] to change to [email protected]. r09.4reseller.org is hostname of my mail server. This i have done by generic mapping in postfix: smtp_generic_maps = hash:/etc/postfix/generic In /etc/postfix/generic: [email protected] [email protected] This is working as return address is changed to [email protected] when mail is sent. But when i try to sent mail on [email protected] I don't get mail on [email protected]. I have tried virtual mapping in postfix i.e by the file /etc/postfix/virtual but its not helping.

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  • Nginx: Rewriting directory path to file

    - by Doug
    I'm a little new to Nginx here so bear with me - I want to rewrite a url like foo.bar.com/newfoo?limit=30 to foo.bar.com/newfoo.php?limit=30. Seems pretty simple to do it something like this rewrite ^([a-z]+)(.*)$ $1.php$2 last; The part that I am confused about is where to put it - I've tried my hand at a some location directives but I'm doing it wrong. Here's my existing virtual host config, where should I implement my rewrite? server { listen 80; listen [::]:80; server_name foo.bar.com; root /home/foo; index index.php index.html index.htm; location / { try_files $uri $uri/ /index.html; } location /doc/ { alias /usr/share/doc/; autoindex on; allow 127.0.0.1; deny all; } location ~ \.php$ { try_files $uri =404; fastcgi_split_path_info ^(.+\.php)(/.+)$; include fastcgi_params; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_pass unix:/tmp/php5-fpm.sock; fastcgi_index index.php; } } Thanks!

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  • htaccess rewriting all subdomains to subdirectories

    - by indorock
    I'm trying to build a catch-all for any subdomains (not captured by previous rewrite rules) for a certain domain, and serve a website from a subdirectory that resides in the same folder as the .htaccess file. I already have my vhosts.conf to send all unmapped requests to a "playground" folder, where I want to easily create new subdomains by simply adding a subfolder. So, my structure looks like this: /var/www/playground |-> /foo |-> /bar The .htacces living inside the /playground folder and /foo and /bar being seperate websites. I want http://foo.domain.com to point to /foo and http://bar.domain.com to /bar. Here is my .htaccess file: RewriteEngine On RewriteCond %{HTTP_HOST} ^([^.]+).domain.com$ [NC] RewriteCond %{REQUEST_URI} !^/%1/(.*) RewriteRule ^(.*) /%1/$1 [L] This is supposed to capture the subdomain, add it as a subfolder in RewriteRule, then append after the slash and path information. The second RewriteCond is there to prevent an infinite loop. My idea was that %1 in the second RewriteCond would be able to capture the capture group in the first RewriteCond. But so far I haven't had any success, it's always ending up in a redirect loop. If I would replace %1 in the second RewriteCond with hardcoded 'foo' or 'bar', it works, which leads me to believe that you cannot refer to a capture group inside a RewriteCond. Is is true? Or am I missing something?

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  • Account for simple url rewriting in ASP.NET MVC redirect

    - by Kevin Montrose
    How would you go about redirecting in ASP.NET MVC to take into account some external URL rewriting rules. For example: What the user enters: http://www.example.com/app/route What ASP.NET MVC sees: /route What I want to redirect to: http://www.example.com/app/other_route What actually happens when I do a simple RedirectToAction: http://www.example.com/other_route (which doesn't exist, from the outside anyway) This seems like it should be simple, but I'm drawing a blank.

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  • Pseudo LRU tree algorithm.

    - by patros
    A lot of descriptions of Pseudo LRU algorithms involve using a binary search tree, and setting flags to "point away" from the node you're searching for every time you access the tree. This leads to a reasonable approximation of LRU. However, it seems from the descriptions that all of the nodes deemed LRU would be leaf nodes. Is there a pseudo-LRU algorithm that deals with a static tree that will still perform reasonably well, while determining that non-leaf nodes are suitable LRU candidates?

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  • Parsing a given binary tree using python?

    - by kaushik
    Parse a binary tree,referring to given set of features,answering decision tree question at each node to decide left child or right child and find the path to leaf node according to answer given to the decision tree.. input wil be a set of feature which wil help in answering the question at each level to choose the left or right half and the output will be the leaf node.. i need help in implementing this can anyone suggest methods?? Please answer... thanks in advance..

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  • gunit syntax for tree walker with a flat list of nodes

    - by Kaleb Pederson
    Here's a simple gunit test for a portion of my tree grammar which generates a flat list of nodes: objectOption walks objectOption: <<one:"value">> -> (one "value") Although you define a tree in ANTLR's rewrite syntax using a caret (i.e. ^(ROOT child...)), gunit matches trees without the caret, so the above represents a tree and it's not surprising that it fails: it's a flat list of nodes and not a tree. This results in a test failure: 1 failures found: test2 (objectOption walks objectOption, line17) - expected: (one \"value\") actual: one \"value\" Another option which seems intuitive is to leave off the parenthesis, like this: objectOption walks objectOption: <<one:"value">> -> one "value" But gunit doesn't like this syntax. It seems to result in a parse failure in the gunit grammar: line 17:20 no viable alternative at input 'one' line 17:24 missing ':' at 'value' line 0:-1 no viable alternative at input '<EOF>' java.lang.NullPointerException at org.antlr.gunit.OutputTest.getExpected(OutputTest.java:65) at org.antlr.gunit.gUnitExecutor.executeTests(gUnitExecutor.java:245) ... What is the correct way to match a flat tree?

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  • Psuedo LRU tree algorithm.

    - by patros
    A lot of descriptions of Pseudo LRU algorithms involve using a binary search tree, and setting flags to "point away" from the node you're searching for every time you access the tree. This leads to a reasonable approximation of LRU. However, it seems from the descriptions that all of the nodes deemed LRU would be leaf nodes. Is there a pseudo-LRU algorithm that deals with a static tree that will still perform reasonably well, while determining that non-leaf nodes are suitable LRU candidates?

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  • Output of gcc -fdump-tree-original

    - by Job
    If I dump the code generated by GCC for a virtual destructor (with -fdump-tree-original), I get something like this: ;; Function virtual Foo::~Foo() (null) ;; enabled by -tree-original { <<cleanup_point <<< Unknown tree: expr_stmt (void) (((struct Foo *) this)->_vptr.Foo = &_ZTV3Foo + 8) >>> >>; } <D.20148>:; if ((bool) (__in_chrg & 1)) { <<cleanup_point <<< Unknown tree: expr_stmt operator delete ((void *) this) >>> >>; } My question is: where is the code after "<D.20148>:;" located? It is outside of the destructor so when is this code executed?

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  • What is validating a binary search tree?

    - by dotnetdev
    I read on here of an exercise in interviews known as validating a binary search tree. How exactly does this work? What would one be looking for in validating a binary search tree? I have written a basic search tree, but never heard of this concept. Thanks

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