gistfile1.txt

### toml
# HTTP Authorization Bearer token
[gab]
token = 'fill your token'

# Consumer Token of application
[twitter.consumer]
key = 'key'
secret = 'secret'

# Authorization Token to access user account
[twitter.access]
key = 'key'
secret = 'secret'

### code to parse
//!Configuration module
use ::std::fs::{
    File
};
use ::std::path::{
    Path
};
use ::std::io::{
    BufReader,
    Read
};

use ::toml;

pub const NAME: &'static str = "fie.toml";

#[derive(Serialize, Deserialize, Debug)]
pub struct Token {
    key: String,
    secret: String
}
///Twitter configuration
#[derive(Deserialize, Debug)]
pub struct Twitter {
    pub consumer: Token,
    pub access: Token
}

///Gab configuration.
#[derive(Deserialize, Debug)]
pub struct Gab {
    ///Token to use for authorization.
    ///
    ///You can get it after logging into gab.io and examining your HTTP requests.
    pub token: String
}

#[derive(Deserialize, Debug)]
pub struct Config {
    pub gab: Gab,
    pub twitter: Twitter
}

impl Config {
    pub fn from_file(path: &Path) -> Result<Self, String> {
        let file = File::open(path).map_err(error_formatter!("Cannot open config file."))?;
        let mut file = BufReader::new(file);

        let mut buffer = String::new();
        file.read_to_string(&mut buffer).map_err(error_formatter!("Unable to read config file."))?;

        toml::from_str(&buffer).map_err(error_formatter!("Invalid config file!"))?
    }
}