nickel Webフレームワークを使ってみる ref: http://qiita.com/dseg/items/66ec3bcecadb0317f85e

Cargo.toml

[package]
name = "nickel-helloworld-postgres"
version = "0.1.0"
authors = ["johndoe"]

[dependencies]
nickel = "*"
r2d2 = "*"
postgres = "*"
openssl = "*"

[dependencies.nickel_postgres]
git = "https://github.com/nickel-org/nickel-postgres.git"

counter.sql

-- スキーマと初期データ
CREATE TABLE counter (
  id SERIAL,
  counter SMALLINT NOT NULL DEFAULT 0
);

INSERT INTO counter (id, counter) VALUES (0, 1);

file0.txt

sudo -i
add-apt-repository -y ppa:hansjorg/rust
apt-get update
apt-get install rust-stable cargo-nightly
exit

rustc --version
rustc 1.4.0-dev

ls -lH $(which rustc)
-rwxr-xr-x 1 root root 6064 Nov  1 19:59 /usr/bin/rustc

cargo --version
cargo 0.7.0 (b6cc27a 2015-11-28)

file1.txt

$ cargo new nickel-helloworld --bin

file10.txt

cargo new nickel-helloworld-postgres --bin

file14.txt

$ ~/devel/rust/nickel-helloworld-postgres$ curl http://localhost:6767/count
<h1>Hello</h1><br>your are the visitor # 21.

$ ~/devel/rust/nickel-helloworld-postgres$ curl http://localhost:6767/count
<h1>Hello</h1><br>your are the visitor # 22.

$ ~/devel/rust/nickel-helloworld-postgres$ curl http://localhost:6767/count
<h1>Hello</h1><br>your are the visitor # 23.

file15.txt

$ cd devel/rust/nickel-helloworld
~/devel/rust/nickel-helloworld$ ab -n 10 -c 1 http://localhost:6767/
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient).....done


Server Software:        Nickel
Server Hostname:        localhost
Server Port:            6767

Document Path:          /
Document Length:        23 bytes

Concurrency Level:      1
Time taken for tests:   0.009 seconds
Complete requests:      10
Failed requests:        0
Total transferred:      1670 bytes
HTML transferred:       230 bytes
Requests per second:    1133.92 [#/sec] (mean)
Time per request:       0.882 [ms] (mean)
Time per request:       0.882 [ms] (mean, across all concurrent requests)
Transfer rate:          184.93 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.1      0       0
Processing:     0    1   0.9      1       3
Waiting:        0    1   0.9      1       3
Total:          1    1   1.0      1       4

Percentage of the requests served within a certain time (ms)
  50%      1
  66%      1
  75%      1
  80%      1
  90%      4
  95%      4
  98%      4
  99%      4
 100%      4 (longest request)

file16.txt

# cargo build --release
cargo run --release # build & run

     Running `target/release/nickel-helloworld`
Listening on http://127.0.0.1:6767
Ctrl-C to shutdown server

file17.txt

$ ab -n 10 -c 1 http://localhost:6767/
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient).....done


Server Software:        Nickel
Server Hostname:        localhost
Server Port:            6767

Document Path:          /
Document Length:        23 bytes

Concurrency Level:      1
Time taken for tests:   0.001 seconds
Complete requests:      10
Failed requests:        0
Total transferred:      1670 bytes
HTML transferred:       230 bytes
Requests per second:    9433.96 [#/sec] (mean)
Time per request:       0.106 [ms] (mean)
Time per request:       0.106 [ms] (mean, across all concurrent requests)
Transfer rate:          1538.55 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:     0    0   0.0      0       0
Waiting:        0    0   0.0      0       0
Total:          0    0   0.0      0       0

Percentage of the requests served within a certain time (ms)
  50%      0
  66%      0
  75%      0
  80%      0
  90%      0
  95%      0
  98%      0
  99%      0
 100%      0 (longest request)

file4.txt

# cargo runだと ビルド・実行を連続で行う
#
$ cargo build

   Compiling rand v0.3.12
   Compiling matches v0.1.2
   Compiling rustc-serialize v0.3.16
   Compiling mustache v0.6.3
   Compiling num v0.1.28
   Compiling serde v0.6.6
   Compiling unicase v1.0.1
   Compiling modifier v0.1.0
   Compiling time v0.1.34
   Compiling num_cpus v0.2.10
   Compiling uuid v0.1.18
   Compiling url v0.2.38
   Compiling cookie v0.1.21
   Compiling mime v0.1.1
   Compiling typemap v0.3.3
   Compiling plugin v0.2.6
   Compiling memchr v0.1.7
   Compiling aho-corasick v0.4.0
   Compiling regex v0.1.43
   Compiling language-tags v0.0.7
   Compiling hyper v0.6.16
   Compiling nickel v0.7.3
   Compiling nickel-helloworld v0.1.0 (file:///home/ubuntu/devel/rust/nickel-helloworld)

file5.txt

$ cargo run
     Running `target/debug/nickel-helloworld`
Listening on http://127.0.0.1:6767
Ctrl-C to shutdown server

$ curl http://127.0.0.1:6767/user/dseg
<h1>This is user: "dseg"</h1>

file8.txt

$ cargo run
~/devel/rust/nickel-helloworld$ cargo run
     Running `target/debug/nickel-helloworld`
Listening on http://127.0.0.1:6767
Ctrl-C to shutdown server

file9.txt

$:~/devel/rust/nickel-helloworld$ curl http://localhost:6767
<html>
  <head>
    <title>A Simple Mustache Demo</title>
    <meta charset="utf-8">
  </head>
  <body>
      <h1>A Simple Mustache Demo</h1>
      <h4>Product Info: California Apple</h4>
      <ul>
          <li>Product: California Apple</li>
          <li>Color: Green</li>
          <li>Price: $2.50</li>
      </ul>
  </body>
</html>

hello.tpl

<html> 
  <head> 
  <title>A Simple Mustache Demo</title> 
  <meta charset="utf-8">
</head> 
<body> 
  <h1>A Simple Mustache Demo</h1>
    <h4>Product Info: {{name}}</h4>
    <ul>
      <li>Product: {{name}}</li>
      <li>Color: {{color}}</li>
      <li>Price: ${{price}}</li>
    </ul>
</body> 
</html> 

main.rs

#[macro_use] extern crate nickel;

extern crate r2d2;
extern crate postgres;
extern crate openssl;
extern crate nickel_postgres;

use nickel::{Nickel,HttpRouter};
use r2d2::NopErrorHandler;
use postgres::SslMode;
use nickel_postgres::{PostgresMiddleware, PostgresRequestExtensions};

fn main() {
    let mut serv = Nickel::new();
    let dsn = "postgres://dbuser:[email protected]/counter";
    let dbpool = PostgresMiddleware::new(&*dsn,
                                         SslMode::None,
                                         5,
                                         Box::new(NopErrorHandler)).unwrap();
    serv.utilize(dbpool);
    serv.get("/count",
             middleware! {|req, res|
              let conn = req.db_conn();
              let stmt = conn.prepare("SELECT counter FROM counter WHERE id = 0").unwrap();
              let rows = &stmt.query(&[]).unwrap();
              let mut counter:i16 = 0; // Int2(smallint) of Postgres is i16
              for row in rows {
                counter = row.get(0);
              }
              // also print to stdout
              println!("counter value is {}", counter);

              // Up and save the counter value (+1)
              conn.execute("UPDATE counter SET counter = counter + 1 WHERE id = 0", &[]).unwrap();

              format!("<h1>Hello</h1><br>your are the visitor # {}.\n", counter)
            });
    serv.listen("localhost:6767");
}