oauth-client-fix 0.1.5

OAuth client for Rust
Documentation 
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// Copyright 2016 oauth-client-rs Developers
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.

#![warn(bad_style,
        unused, unused_extern_crates, unused_import_braces,
        unused_qualifications, unused_results)]

extern crate curl;
extern crate oauth_client as oauth;
extern crate rand;

use std::borrow::Cow;
use std::collections::HashMap;
use std::io::Read;
use std::str;
use curl::easy::{Easy, List};
use oauth::Token;
use rand::Rng;

mod api {
    pub const REQUEST_TOKEN: &'static str = "http://oauthbin.com/v1/request-token";
    pub const ACCESS_TOKEN: &'static str = "http://oauthbin.com/v1/access-token";
    pub const ECHO: &'static str = "http://oauthbin.com/v1/echo";
}

fn split_query<'a>(query: &'a str) -> HashMap<Cow<'a, str>, Cow<'a, str>> {
    let mut param = HashMap::new();
    for q in query.split('&') {
        let mut s = q.splitn(2, '=');
        let k = s.next().unwrap();
        let v = s.next().unwrap();
        let _ = param.insert(k.into(), v.into());
    }
    param
}

fn get_request_token(consumer: &Token) -> Token<'static> {
    let header = oauth::authorization_header("GET", api::REQUEST_TOKEN, consumer, None, None);
    let mut handle = Easy::new();
    let mut list = List::new();
    list.append(format!("Authorization: {}", header).as_ref()).unwrap();
    let mut resp = Vec::new();
    handle.url(api::REQUEST_TOKEN.as_ref()).unwrap();
    handle.http_headers(list).unwrap();
    handle.get(true).unwrap();
    {
        let mut transfer = handle.transfer();
        transfer.write_function(|data| {
            resp.extend_from_slice(data);
            Ok(data.len())
        }).unwrap();
        transfer.perform().unwrap();
    }
    let resp = str::from_utf8(&resp)
        .unwrap()
        .to_string();
    println!("get_request_token response: {:?}", resp);
    let param = split_query(resp.as_ref());
    Token::new(param.get("oauth_token").unwrap().to_string(),
               param.get("oauth_token_secret").unwrap().to_string())
}

fn get_access_token(consumer: &Token, request: &Token) -> Token<'static> {
    let header = oauth::authorization_header("GET",
                                             api::ACCESS_TOKEN,
                                             consumer,
                                             Some(request),
                                             None);
    let mut handle = Easy::new();
    let mut list = List::new();
    list.append(format!("Authorization: {}", header).as_ref()).unwrap();
    let mut resp = Vec::new();
    handle.url(api::ACCESS_TOKEN.as_ref()).unwrap();
    handle.http_headers(list).unwrap();
    handle.get(true).unwrap();
    {
        let mut transfer = handle.transfer();
        transfer.write_function(|data| {
            resp.extend_from_slice(data);
            Ok(data.len())
        }).unwrap();
        transfer.perform().unwrap();
    }
    let resp = str::from_utf8(&resp)
        .unwrap()
        .to_string();
    println!("get_access_token response: {:?}", resp);
    let param = split_query(resp.as_ref());
    Token::new(param.get("oauth_token").unwrap().to_string(),
               param.get("oauth_token_secret").unwrap().to_string())
}

fn echo(consumer: &Token, access: &Token) {
    let header = oauth::authorization_header("POST", api::ECHO, consumer, Some(access), None);
    let mut rng = rand::thread_rng();
    let req_body = rng.gen_ascii_chars().take(100).collect::<String>();
    let mut handle = Easy::new();
    let mut list = List::new();
    list.append(format!("Authorization: {}", header).as_ref()).unwrap();
    list.append("Content-Type: application/octet-stream".as_ref()).unwrap();
    let mut resp = Vec::new();
    handle.url(api::ECHO.as_ref()).unwrap();
    handle.http_headers(list).unwrap();
    handle.post(true).unwrap();
    handle.post_field_size(req_body.len() as u64).unwrap();
    {
        let mut transfer = handle.transfer();
        transfer.read_function(|into| {
            let mut req_body = req_body.as_bytes();
            Ok(req_body.read(into).unwrap())
        }).unwrap();
        transfer.write_function(|data| {
            resp.extend_from_slice(data);
            Ok(data.len())
        }).unwrap();
        transfer.perform().unwrap();
    }
    let resp = str::from_utf8(&resp).unwrap();
    println!("echo response: {:?}", resp);
    let resp_body: &str = resp.as_ref();
    assert_eq!("", resp_body);
}

fn main() {
    let consumer = Token::new("key", "secret");
    println!("consumer: {:?}", consumer);

    let request = get_request_token(&consumer);
    println!("request: {:?}", request);

    let access = get_access_token(&consumer, &request);
    println!("access: {:?}", access);

    echo(&consumer, &access);

    println!("OK");
}