connect shadowsocks server on ubuntu via ss-local

#Server config
[Set up your own shadowsocks server](https://errong.win/2018/06/05/setup-shadowsocks-on-ubuntu-16-04/) or found/buy one.
You should have a shadowsocks server with below informations:
* server ip
* server port
* password
* method

#install
~~~
sudo apt-get install software-properties-common -y
sudo add-apt-repository ppa:max-c-lv/shadowsocks-libev -y
sudo apt-get update
sudo apt install shadowsocks-libev
~~~

#configure
match to the server's info.
~~~
sudo vim /etc/shadowsocks-libev/config.json
{
    "server":"xx.xx.xx.xx", // server IP
    "server_port":8911,
    "local_port":1008, // local port
    "password":"jesuslove",
    "timeout":60,
    "method":"chacha20-ietf-poly1305"
}
~~~

#run ss-local
```sudo ss-local -c  /etc/shadowsocks-libev/config.json```

#export socks proxy system wide
~~~
export http_proxy=socks5://127.0.0.1:1008
export https_proxy=socks5://127.0.0.1:1008
~~~

#use proxy extension set for chrome/firefox browser
config your proxy extension in your browser to use socks5 proxy
127.0.0.1:1008
at No comments:

c++: Max Heap Template

https://en.wikipedia.org/wiki/Min-max_heap
My simple implementation of max heap.
Change the compare from > to < in below codes, you will get a min heap.


template<typename T>
class MaxHeap {
public:
 MaxHeap() {
  size_ = 0;
  capacity_ = 2;
  heap_ = new T[capacity_];
 }
 MaxHeap(int capacity) {
  if (capacity >= 2) {
   heap_ = new T[capacity];
   capacity_ = capacity;
   size_ = 0;
  }
  else {
   size_ = 0;
   capacity_ = 2;
   heap_ = new T[capacity_];
  }
 }
 ~MaxHeap() {
  if (heap_)
   delete[] heap_;
 }
public:
 int size() { return size_; }
 void insert(const T& t) {
  if ((size_+1) >= capacity_) {
   capacity_ *= 2;
   T* tmp = new T[capacity_];
   for (int i = 0; i <= size_; i++)
    tmp[i] = heap_[i];
   delete[] heap_;
   heap_ = tmp;
  }
  size_++;
  heap_[size_] = t;
  int i = size_;
  int tmp = heap_[i];
  while (i > 1 && tmp > heap_[i / 2]) {
   heap_[i] = heap_[i / 2];
   heap_[i / 2] = tmp;
   tmp = heap_[i / 2];
   i /= 2;
  }
  heap_[i] = tmp;
 }
 T max() {
  return heap_[1];
 }
 int index(const T& t) {
  return index(1, t);
 }
 void removeByIndex(int i) {
  if (i < 1)
   return;
  if (heap_[size_] == heap_[i]) {
   heap_[i] = heap_[size_];
   size_--;
   return;
  }
  if (heap_[size_] < heap_[i]) {
   heap_[i] = heap_[size_];
   size_--;
   maxDown(i);
   return;
  }
  heap_[i] = heap_[size_];
  size_--;
  maxUp(i);
 }
 void remove(const T& t) {
  return removeByIndex(index(t));
 }
private:
 inline int index(int i, const T& t) {
  if (heap_[i] < t)
   return -1;
  if (heap_[i] == t)
   return i;
  int r = index(2 * i, t);
  if (r != -1)
   return r;
  return index(2 * i + 1, t);
 }
 inline void maxDown(int i) {
  if (i * 2 > size_ && (i * 2 + 1) > size_)
   return;
  int l = i * 2;
  int r = l + 1;
  int m = l;
  if (r <= size_ && heap_[r] > heap_[l])
   m = r;
  if (heap_[m] <= heap_[i])
   return;
  T tmp = heap_[i];
  heap_[i] = heap_[m];
  heap_[m] = tmp;
  maxDown(m);
 }
 inline void maxUp(int i) {
  if (i <= 1)
   return;
  int p = i / 2;
  if (heap_[p] >= heap_[i])
   return;
  T tmp = heap_[i];
  heap_[i] = heap_[p];
  heap_[p] = tmp;
  maxUp(p);
 }
private:
 T* heap_;
 int capacity_;
 int size_;
};

static MaxHeap<int>* all[101] = { 0, };
static int mt = 0;

void Init()
{
 for (int i = 1; i < mt; i++)
  if (all[i]) {
   delete all[i];
   all[i] = 0;
  }
 mt = 0;
}

void insertID(int ProductType, int ProductID)
{
 if (!all[ProductType])
  all[ProductType] = new MaxHeap <int>(50001) ;
 all[ProductType]->insert(ProductID);
 if ((ProductType + 1) > mt)
  mt = ProductType + 1;
}

int highestID(int ProductType)
{
 if (!all[ProductType] || all[ProductType]->size() <= 0)
  return -1;
 return all[ProductType]->max();
}

int findhighestID(int type)
{
 int maxType = -1;
 int maxId = -1;
 for (int i = 1; i < mt; i++)
  if (all[i] && all[i]->size() > 0) {
   int max = all[i]->max();
   if (max > maxId) {
    maxId = max;
    maxType = i;
   }
  }
 if (type == 0)
  return maxType;
 return maxId;
}

void demarket(int ProductID)
{
 for (int i = 1; i < mt; i++)
  if (all[i]) {
   int index = all[i]->index(ProductID);
   if (index >= 1) {
    all[i]->removeByIndex(index);
    break;
   }
  }
}
at No comments:

Ember.js : Custom "index" route's path and Custom "/" path's route

"index" Route

The index route, which will handle requests to the root URI (/) of our site.
How to generate a new route called index:
ember g route index
The index route is special: it does NOT require an entry in the router's mapping.

a Nested "index" Route

An index nested route works similarly to the base index route. It is the default route that renders when no route is provided. Use 'rentals' as example, when we navigate to /rentals, Ember will attempt to load the rentals index route as a nested route.
To create an index nested route, run the following command:
ember g route rentals/index
If you open up your Router (app/router.js) you may notice that the rentals line has changed. This extra function() {} is required because it needs a child route, the this.route('index', { path: '/'}); is implied.
Router.map(function() {
  this.route('about');
  this.route('contact');
  this.route('rentals', function() {
    // implied code
    // this.route('index', { path: '/'});
  });
});

replaceWith and transitionTo

Use "replaceWidth" and "transitionTo", We can simply forward "/" to the "rentals" route. You will found the url displayed in url bar will changed from "http://localhost" to "http://localhost/rentals".
Well, everything is fine here except one little fault.
I do not want this redirect from "/" to "/rentals".
I hope it always be "/".
Can we make it ?

Is "index/index" possible ?

I tried below command:
ember g route index/index
installing route
  create app/routes/index/index.js
  create app/templates/index/index.hbs
updating router
  add route index/index
installing route-test
  create tests/unit/routes/index/index-test.js
Command execute without errors, but blank page showed with "http://localhost".
It seems not work. Then I remember the impled code:
this.route('index', { path: '/'});
However, you can add the index route if you want to customize it. For example, you can modify the index route's path by specifying this.route('index', { path: '/custom-path'}).

Custom "index" route's path

We can custom "index" route's path by the impled code.
I guess We can custom the path's route also.
this.route('rentals', {path:'/'});
Ember server will handle requests to the root URI (/) to route "rentals" rather than the default "index" route now.
Can it works ? Let's try

Custom path's route

I use super-rentals as a example.
First I destroy "index" route.
ember d route index
Modify the app router.
git diff app/router.js
diff --git a/app/router.js b/app/router.js
index 254d53d..9f14d85 100644
--- a/app/router.js
+++ b/app/router.js
@@ -9,7 +9,7 @@ const Router = EmberRouter.extend({
 Router.map(function() {
   this.route('about');
   this.route('contact');
-  this.route('rentals', function() {
+  this.route('rentals', {path:'/'}, function() {
     this.route('show', { path: '/:rental_id' });
   });
 });
 
Modify templates, all link to "index" replaced with "rentals".
-  {{#link-to 'index' class="button"}}
+  {{#link-to 'rentals' class="button"}}
 
ember serve
I got what I wished.
The url bar is clean now.
Only "http://localhost", no "rentals" anymore.
super-rental

Refers

Routes and templates
Adding Nested Routes
at No comments:

Set up gitweb server on nginx

Precondition

please setup your git server via git-http-backend on nginx.

Setup gitweb conf

sudo apt-get install gitweb
/etc/gitweb.conf is Gitweb (Git web interface) configuration file
The default project root is /usr/lib/git.
Here, I changed to my own path.
our $projectroot = "/home/errong_leng/www/git";

Change nginx conf

cat /etc/nginx/sites-enabled/git.errong.win.conf
server {
    listen  80;
    listen [::]:80;
    server_name git.errong.win;
    auth_basic "Restricted";
    auth_basic_user_file /home/errong_leng/.gitpasswd;
 location ~ ^.*\.git/(HEAD|info/refs|objects/info/.*|git-(upload|receive)-pack)$ {
  root /home/errong_leng/www/git;
  fastcgi_pass unix:/var/run/fcgiwrap.socket;
  fastcgi_param SCRIPT_FILENAME   /usr/lib/git-core/git-http-backend;
  fastcgi_param PATH_INFO         $uri;
  fastcgi_param GIT_PROJECT_ROOT  /home/errong_leng/www/git;
  fastcgi_param GIT_HTTP_EXPORT_ALL "";
  fastcgi_param REMOTE_USER $remote_user;
  include fastcgi_params;
 }
 location /index.cgi {
  root /usr/share/gitweb;
  include fastcgi_params;
  gzip off;
  fastcgi_param SCRIPT_NAME $uri;
  fastcgi_param GITWEB_CONFIG /etc/gitweb.conf;
  fastcgi_pass unix:/var/run/fcgiwrap.socket;
 }
 location / {
  root /usr/share/gitweb;
  index index.cgi;
 }
}
cat /etc/nginx/sites-enabled/git.errong.win-ssl.conf
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name git.errong.win;
    ssl_certificate /etc/letsencrypt/git.errong.win/fullchain.cer;
    ssl_certificate_key /etc/letsencrypt/git.errong.win/git.errong.win.key;
    auth_basic "Restricted";
    auth_basic_user_file /home/errong_leng/.gitpasswd;
 location ~ ^.*\.git/(HEAD|info/refs|objects/info/.*|git-(upload|receive)-pack)$ {
  root /home/errong_leng/www/git;
  fastcgi_pass unix:/var/run/fcgiwrap.socket;
  fastcgi_param SCRIPT_FILENAME   /usr/lib/git-core/git-http-backend;
  fastcgi_param PATH_INFO         $uri;
  fastcgi_param GIT_PROJECT_ROOT  /home/errong_leng/www/git;
  fastcgi_param GIT_HTTP_EXPORT_ALL "";
  fastcgi_param REMOTE_USER $remote_user;
  include fastcgi_params;
 }
 location /index.cgi {
  root /usr/share/gitweb;
  include fastcgi_params;
  gzip off;
  fastcgi_param SCRIPT_NAME $uri;
  fastcgi_param GITWEB_CONFIG /etc/gitweb.conf;
  fastcgi_pass unix:/var/run/fcgiwrap.socket;
    }
 location / {
  root /usr/share/gitweb;
  index index.cgi;
 }
}
Restart nginx server.

gitweb done

git.errong.win

errors handle

If your gitweb server can't work.
You can check the error log to analysis the cause.
cat /var/log/nginx/error.log
In my case, I encountered below errors.
It turned out that my system did not install perl module for CGI and HTML::Entities.
I installed them manually from sources.
Download CGI source
Download HTML::Entities source
I have a post for this. Install perl module from source
2018/06/13 04:35:36 [error] 28827#28827: *6986 FastCGI sent in stderr: "Can't locate CGI.pm in @INC (you may nee
d to install the CGI module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/sh
are/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/s
hare/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .) at /usr/share/gitweb/index.cgi li
ne 13.
BEGIN failed--compilation aborted at /usr/share/gitweb/index.cgi line 13" while reading response header from ups
tream, client: 58.213.161.114, server: git.errong.win, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var
/run/fcgiwrap.socket:", host: "git.errong.win"
2018/06/13 04:35:36 [error] 28827#28827: *6986 upstream prematurely closed FastCGI stdout while reading response
 header from upstream, client: 58.213.161.114, server: git.errong.win, request: "GET / HTTP/1.1", upstream: "fas
tcgi://unix:/var/run/fcgiwrap.socket:", host: "git.errong.win"


2018/06/13 04:58:03 [error] 28827#28827: *7008 FastCGI sent in stderr: "[Wed Jun 13 04:58:03 2018] index.cgi: Ca
n't locate HTML/Entities.pm in @INC (you may need to install the HTML::Entities module) (@INC contains: /etc/per
l /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 
/usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_
64-linux-gnu/perl-base .) at /usr/local/share/perl/5.22.1/CGI.pm line 2219" while reading response header from u
pstream, client: 58.213.161.114, server: git.errong.win, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/v
ar/run/fcgiwrap.socket:", host: "git.errong.win"
2018/06/13 04:58:30 [error] 28827#28827: *7010 FastCGI sent in stderr: "[Wed Jun 13 04:58:30 2018] index.cgi: Ca
n't locate HTML/Entities.pm in @INC (you may need to install the HTML::Entities module) (@INC contains: /etc/per
l /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 
/usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_
64-linux-gnu/perl-base .) at /usr/local/share/perl/5.22.1/CGI.pm line 2219" while reading response header from u
pstream, client: 210.94.41.89, server: git.errong.win, request: "GET / HTTP/2.0", upstream: "fastcgi://unix:/var
/run/fcgiwrap.socket:", host: "git.errong.win"
at No comments:

Install Perl module on ubuntu

Install by cpan

cpan -i foo
Replace foo with the module name you want to install.

Install from source

Search the module on cpan.org
Download the source.
Let's use HTML::Entities for example.
You will get your search url:
http://search.cpan.org/~gaas/HTML-Parser-3.72/lib/HTML/Entities.pm
The source url will be:
http://www.cpan.org/authors/id/G/GA/GAAS/HTML-Parser-3.72.tar.gz

Make and install perl module

  tar -xvf HTML-Parser-3.72.tar.gz   
  cd HTML-Parser-3.72/ 
  perl Makefile.PL
  make
  sudo make install
at No comments:

setup http/https git server on nginx via git-http-backend

Precondition

sudo apt-get install nginx fcgiwrap git apache2-utils

Set up https server

First, please setup your https server by your self.
You can refer to my guide

git-http-backend

git-http-backend is a Server side implementation of Git over HTTP.
/usr/lib/git-core/git-http-backend

Set Up Password Authentication file for your git server

We can get a password with MD5-based password algorithm, Apache variant via openssl passwd command.
You can add a username to the file using this command. We are using sammy as our username, but you can use whatever name you'd like:
sudo sh -c "echo -n 'sammy:' >> .gitpasswd"
Next, add an encrypted password entry for the username by typing:
sudo sh -c "openssl passwd -apr1 >> .gitpasswd"
You can repeat this process for additional usernames. You can see how the usernames and encrypted passwords are stored within the file by typing:
cat .gitpasswd
Output
sammy:$apr1$wI1/T0nB$jEKuTJHkTOOWkopnXqC1d1
Or We can use The htpasswd utility, found in the apache2-utils package, serves this function well.
Let's add a new user kimmy via htpasswd, below is command line.
htpasswd -c .gitpasswd kimmy 
cat .gitpasswd 
sammy:$apr1$wI1/T0nB$jEKuTJHkTOOWkopnXqC1d1 
kimmy:$apr1$sBPFn6ek$L8Ta2LkiuXzi7bQZUqUlq0

http/https nginx conf

cat /etc/nginx/sites-enabled/git.errong.win.conf
server {
    listen  80;
    listen [::]:80;
    server_name git.errong.win;
    auth_basic "Restricted";
    auth_basic_user_file /home/errong_leng/.gitpasswd;
    location ~ (/.*) {
        fastcgi_pass  unix:/var/run/fcgiwrap.socket;
        include       fastcgi_params;
        fastcgi_param SCRIPT_FILENAME /usr/lib/git-core/git-http-backend;
        fastcgi_param GIT_HTTP_EXPORT_ALL "";
        fastcgi_param GIT_PROJECT_ROOT    /home/errong_leng/www/git;
        fastcgi_param REMOTE_USER         $remote_user;
        fastcgi_param PATH_INFO           $uri;
    }
}
cat /etc/nginx/sites-enabled/git.errong.win-ssl.conf
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name git.errong.win;
    ssl_certificate /etc/letsencrypt/git.errong.win/fullchain.cer;
    ssl_certificate_key /etc/letsencrypt/git.errong.win/git.errong.win.key;
    auth_basic "Restricted";
    auth_basic_user_file /home/errong_leng/.gitpasswd;
    location ~ (/.*) {
        fastcgi_pass  unix:/var/run/fcgiwrap.socket;
        include       fastcgi_params;
        fastcgi_param SCRIPT_FILENAME /usr/lib/git-core/git-http-backend;
        fastcgi_param GIT_HTTP_EXPORT_ALL "";
        fastcgi_param GIT_PROJECT_ROOT    /home/errong_leng/www/git;
        fastcgi_param REMOTE_USER         $remote_user;
        fastcgi_param PATH_INFO           $uri;
    }
}
OK, nginx server config is done, just reload it.(sudo nginx -s reload)
Now it is time to set up git repository under the root(/home/errong_leng/www/git)

Set up git repository

$ cd www/git/ 
$ mkdir helloworld.git 
$ cd helloworld.git/ 
$ git --bare init 
Initialized empty Git repository in /home/errong_leng/www/git/helloworld.git/ 
$ cp hooks/post-update.sample hooks/post-update 
$ chmod a+x hooks/post-update 
$ chmod a+w . -R
Now, We can git clone and push to the respository on remote machine via http/https protocol.

git clone helloworld.git

git clone https://git.errong.win/helloworld.git
Cloning into 'helloworld'...
Username for 'https://git.errong.win': lenger
Password for 'https://lenger@git.errong.win':
warning: You appear to have cloned an empty repository.
Checking connectivity... done.

git push helloworld.git

git push origin master
Username for 'https://git.errong.win': lenger
Password for 'https://lenger@git.errong.win':
Counting objects: 3, done.
Writing objects: 100% (3/3), 205 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
To https://git.errong.win/helloworld.git
  • [new branch] master -> master
at No comments:

setup https server via An ACME Shell script on nginx

I will give every detail steps when I setup https server for https://git.errong.win.
You can refer as a guide.

acme.sh

acme.sh is probably the easiest & smartest shell script toautomatically issue & renew the free certificates from Let's Encrypt.
Install the shell script via guide

http server nginx conf

First, let's setup a http server first via nginx.
After you installed nginx, the simple way to setup a http server is to add a conf file under /etc/nginx/sites-enabled/ folder.
cat /etc/nginx/sites-enabled/git.errong.com.conf
server {
    listen       80;
    listen       [::]:80;
    server_name  git.errong.com;

    location / {
        root   html;
        index  index.html index.htm;
    }
}
Reload nginx via sudo nginx -s reload

issue free certificates

sudo acme.sh --issue --home /etc/letsencrypt --domain example.com --webroot /home/errong_leng/www/git --reloadcmd "nginx -s reload" --accountemail errong.leng@gmail.com
[Wed Jun 13 01:51:07 UTC 2018] Single domain='git.errong.win'
[Wed Jun 13 01:51:07 UTC 2018] Getting domain auth token for each domain
server {
[Wed Jun 13 01:51:07 UTC 2018] Getting webroot for domain='git.errong.win'
[Wed Jun 13 01:51:07 UTC 2018] Getting new-authz for domain='git.errong.win'
[Wed Jun 13 01:51:08 UTC 2018] The new-authz request is ok.
[Wed Jun 13 01:51:08 UTC 2018] Verifying:git.errong.win
[Wed Jun 13 01:51:11 UTC 2018] Success
[Wed Jun 13 01:51:11 UTC 2018] Verify finished, start to sign.
[Wed Jun 13 01:51:12 UTC 2018] Cert success.

[Wed Jun 13 01:51:12 UTC 2018] Your cert is in  /etc/letsencrypt/git.errong.win/git.errong.win.cer 
[Wed Jun 13 01:51:12 UTC 2018] Your cert key is in  /etc/letsencrypt/git.errong.win/git.errong.win.key 
[Wed Jun 13 01:51:12 UTC 2018] The intermediate CA cert is in  /etc/letsencrypt/git.errong.win/ca.cer 
[Wed Jun 13 01:51:12 UTC 2018] And the full chain certs is there:  /etc/letsencrypt/git.errong.win/fullchain.cer 
[Wed Jun 13 01:51:12 UTC 2018] Run reload cmd: nginx -s reload
[Wed Jun 13 01:51:12 UTC 2018] Reload success
Ok. We have ssl certificates now.
ssl_certificate /etc/letsencrypt/git.errong.win/fullchain.cer; 
ssl_certificate_key /etc/letsencrypt/git.errong.win/git.errong.win.key;

https server nginx conf

cat /etc/nginx/sites-enabled/git.errong.win-ssl.conf
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name git.errong.win;
    location / {
        root   html;
        index  index.html index.htm;
    }
}
 
Now. everything is ready.
Just reload nginx server.
You will find http://git.errong.win and https://git.errong.win work welll now.
Remind :
please replace the server name "git.errong.win" to yours.
at No comments:
Subscribe to: Posts (Atom)

fixed: embedded-redis: Unable to run on macOS Sonoma

Issue you might see below error while trying to run embedded-redis for your testing on your macOS after you upgrade to Sonoma. java.la...