Base Convert and Base Encode

By @sskaje
Link: https://sskaje.me/2014/01/base-convert-base-encode/

Base Convert

Base conversion is a very basic skill in programming.
I was taught converting between decimal(base-10) and binary(base-2), decimal(base-10) and octal(base-8), decimal(base-10) and hexadecimal(base-16), and of course among base 2-powered numbers(pow(2,n)).

The conversion is quite simple, division is the only arithmetic operation we need.
If we want to convert a base-m number to a base-n number by our hands, the common way is:
1 Convert base-m number A to base-10 number B;
2 Convert base-10 number B to base-n number C.
just because the base-10 is the most familiar base to humans.

Continue reading “Base Convert and Base Encode” »

Base Convert and Base Encode by @sskaje: https://sskaje.me/2014/01/base-convert-base-encode/

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Simplified Nginx Proxy for Google URLs in WordPress

By @sskaje
Link: https://sskaje.me/2014/01/simplified-nginx-proxy-google-urls-wordpress/

In Nginx proxy for Google URLs in WordPress, I wrote lots of lines configuring proxies and subs_filter rules.
Here is the newer simplified one:

proxy_cache_path /dev/shm/ncache keys_zone=cache_zone:10m;
...
server{
    ...

    location ~ ^/p/(?<p_domain>[a-z0-9A-Z\.\-]+)/(?<p_ext>.+)$ {
        rewrite ^/p/([a-z0-9A-Z\.\-]+)/(.+)$ /$2 break;
        proxy_pass http://$p_domain:80;
        proxy_set_header Host $p_domain;

        proxy_set_header Accept-Encoding "";

        proxy_cache cache_zone;
        proxy_cache_valid 200 302 10m;
    }

    subs_filter_types text/html* text/css application/javascript;
    subs_filter (\'|\"|url\()(https:|http:|)//(fonts.googleapis.com|themes.googleusercontent.com|apis.google.com) $1/p/$3 gr;
}

proxy_cache_path /dev/shm/ncache keys_zone=cache_zone:10m;

...

server{

...

location ~ ^/p/(?<p_domain>[a-z0-9A-Z\.\-]+)/(?<p_ext>.+)$ {

rewrite ^/p/([a-z0-9A-Z\.\-]+)/(.+)$ /$2 break;

proxy_pass http://$p_domain:80;

proxy_set_header Host $p_domain;

proxy_set_header Accept-Encoding "";

proxy_cache cache_zone;

proxy_cache_valid 200 302 10m;

}

subs_filter_types text/html* text/css application/javascript;

}

Updated(2014-09-19):

    location ~ ^/p/(?<p_domain>[a-z0-9A-Z\.\-]+)/(?<p_ext>.+)$ {
        rewrite ^/p/([a-z0-9A-Z\.\-]+)/(.+)$ /$2 break;
        proxy_pass http://$p_domain:80;
        proxy_set_header Host $p_domain;

        proxy_set_header Accept-Encoding "";

        proxy_buffer_size 64k;
        proxy_buffers   32 32k;
        proxy_busy_buffers_size 128k;

        proxy_cache_key "$scheme$proxy_host$uri$is_args$args$http_user_agent$http_accept_language$http_accept";
        proxy_cache cache_zone;
        proxy_cache_valid 200 302 10m;
        expires 5m;
    }

    subs_filter_types text/html* text/css application/javascript application/x-javascript;
    subs_filter (\'|\"|url\()(https:|http:|)//(fonts.googleapis.com|themes.googleusercontent.com|apis.google.com|fonts.gstatic.com) $1/p/$3 gr;
    subs_filter (\'|\"|url\()(https:|http:|)//(s7.addthis.com|ct1.addthis.com|m.addthis.com|q.addthis.com) $1/p/$3 gr;

location ~ ^/p/(?<p_domain>[a-z0-9A-Z\.\-]+)/(?<p_ext>.+)$ {

rewrite ^/p/([a-z0-9A-Z\.\-]+)/(.+)$ /$2 break;

proxy_pass http://$p_domain:80;

proxy_set_header Host $p_domain;

proxy_set_header Accept-Encoding "";

proxy_buffer_size 64k;

proxy_buffers 32 32k;

proxy_busy_buffers_size 128k;

proxy_cache_key "$scheme$proxy_host$uri$is_args$args$http_user_agent$http_accept_language$http_accept";

proxy_cache cache_zone;

proxy_cache_valid 200 302 10m;

expires 5m;

}

subs_filter_types text/html* text/css application/javascript application/x-javascript;

Simplified Nginx Proxy for Google URLs in WordPress by @sskaje: https://sskaje.me/2014/01/simplified-nginx-proxy-google-urls-wordpress/

mallory proxy update

By @sskaje
Link: https://sskaje.me/2014/01/mallory-proxy-update/

Here is my fork of mallory: https://bitbucket.org/sskaje/mallory, which, as it’s said, is a powerful TCP/UDP proxy, but way too old.
Here you can find how to install it, but the official repo one.

I created a pull request here, but seems IntrepidusGroup guys are not working on this anymore.

And the TCP/UDP raw protocol debug still not work for me. Hope I can figure it out one day.

Btw, quotes of my commit logs:

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mallory proxy update by @sskaje: https://sskaje.me/2014/01/mallory-proxy-update/

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Brief Intro to Mallory

By @sskaje
Link: https://sskaje.me/2014/01/brief-intro-to-mallory/

MiTM(Man in The Middle) is a good way analysing protocols, especially when there’s an SSL. http://en.wikipedia.org/wiki/Man-in-the-middle_attack
To analyse HTTP/HTTPS protocol, we have Charles Proxy. Posts on my blog can be found https://sskaje.me/tag/charles-proxy/ (there’s another MiTM proxy, ‘mitmproxy’, https://github.com/mitmproxy/mitmproxy and http://mitmproxy.org/, will try later.)
For others, mallory is recommended.

Mallory

Mallory is an extensible TCP/UDP man in the middle proxy that is designed to be run as a gateway. Unlike other tools of its kind, Mallory supports modifying non-standard protocols on the fly.

We have mallory from https://bitbucket.org/IntrepidusGroup/mallory and https://intrepidusgroup.com/insight/mallory/.

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Brief Intro to Mallory by @sskaje: https://sskaje.me/2014/01/brief-intro-to-mallory/

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mallory import netfilter

LC_CTYPE issue on OS X SOLVED!

By @sskaje
Link: https://sskaje.me/2014/01/lc-ctype-issue/

Meet The Problem

Problem occurs when I’m using ssh working on my Ubuntu/Debian from ‘Terminal‘ of Mac OS X’s own.

I can’t remember the first time I saw

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = "en_US:en",
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory

perl: warning: Setting locale failed.

perl: warning: Please check that your locale settings:

LANGUAGE = "en_US:en",

LC_ALL = (unset),

LC_CTYPE = "UTF-8",

LANG = "en_US.UTF-8"

are supported and installed on your system.

perl: warning: Falling back to the standard locale ("C").

locale: Cannot set LC_CTYPE to default locale: No such file or directory

locale: Cannot set LC_ALL to default locale: No such file or directory

Continue reading “LC_CTYPE issue on OS X SOLVED!” »

LC_CTYPE issue on OS X SOLVED! by @sskaje: https://sskaje.me/2014/01/lc-ctype-issue/