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|
use std::sync::Arc;
use reqwest::r#async::Client as ReqwestClient;
pub use super::types;
pub mod endpoints;
pub mod models;
#[derive(Clone)]
pub struct Client {
inner: Arc<ClientRef>
}
impl Client {
pub fn new(id: &str) -> Client {
Client {
inner: Arc::new(ClientRef {
id: id.to_owned(),
client: ReqwestClient::new(),
})
}
}
pub fn new_with_client(id: &str, client: ReqwestClient) -> Client {
Client {
inner: Arc::new(ClientRef {
id: id.to_owned(),
client: client,
})
}
}
}
struct ClientRef {
id: String,
client: ReqwestClient,
}
/*
pub struct Limits {
global: LimiterRef
}
#[derive(Clone)]
pub struct LimiterRef {
inner: Arc<Mutex<Limiter>>
}
trait RateLimiter {
fn remaining(&self) -> usize;
fn limit(&self) -> usize;
}
impl RateLimiter for LimiterRef {
fn remaining(&self) -> usize {
let limits = self.inner.lock().unwrap();
limits.remaining
}
fn limit(&self) -> usize {
let limits = self.inner.lock().unwrap();
limits.limit
}
}
struct RequestJob {
pub request: Request,
pub on_complete: futures::sync::oneshot::Sender<Response>,
}
*/
/* API requests should be placed in a priority queue to prevent stravation.
* This implies that all requests are sent a single location and then returned
* to their callers upon completion.
* When a request is 'owned' by the queue it can be retryed when the rate limit
* is hit and allows inspect of response headers to determine remaining resources.
*/
/*
enum Task {
Add(RequestJob),
Drain,
}
pub struct Limiter {
pub remaining: u32,
pub limit: u32,
in_transit: u32,
pub last_request: Option<DateTime<Utc>>,
pub remaining_key: String,
pub limit_key: String,
pub queue: Vec<RequestJob>,
pub client: ReqwestClient,
pub chan: mpsc::UnboundedSender<Task>,
}
use futures::sync::oneshot;
fn handle_request(limits_ref: LimiterRef, request: RequestJob) {
let limits = limits_ref.inner.lock().unwrap();
limits.queue.push(request);
limits.chan.unbounded_send(Task::Drain);
}
fn handle_drain(limits_ref: LimiterRef) {
let jobs = {
let limits = limits_ref.inner.lock().unwrap();
let take =
std::cmp::max(limits.remaining - limits.in_transit, 0);
let jobs = Vec::new();
for i in 0..std::cmp::min(limits.queue.len() as u32, take) {
jobs.push(limits.queue.pop().unwrap());
}
limits.in_transit += jobs.len() as u32;
jobs
};
let client = {
let limits = limits_ref.inner.lock().unwrap();
&limits.client
};
if jobs.len() > 0 {
for job in jobs {
let clone = job.request.clone();
let f =
client.execute(job.request)
.and_then(move |response| {
let mut limits = limit_ref.inner.lock().unwrap();
limits.in_transit =
std::cmp::max(0, limits.in_transit - 1);
if response.status().is_success() {
let remaining = response.headers()
.get(limits.remaining_key)
.and_then(|value| value.to_str().ok())
.and_then(|remaining| remaining.parse::<usize>().ok());
let limit = response.headers()
.get(limits.limit_key)
.and_then(|value| value.to_str().ok())
.and_then(|remaining| remaining.parse::<usize>().ok());
if let Some(remaining) = remaining {
limits.remaining = remaining;
}
if let Some(limit) = remaining {
limits.limit = limit;
}
job.on_complete.send(Ok(response));
} else if response.status().is_client_error() {
limit.chan_tx.send(Handle(
RequestJob {
request: clone,
on_complete: job.on_complete.clone(),
}))
println!("Hit rate limit! or invalid client")
}
}
impl LimiterRef {
fn handle_drain(&self) {
}
fn handle_requests() {
chan_rx.for_each(move |task| {
match task {
Handle(request) => {
handle_request( tfdsf, request);
},
Drain => {
}
} else {
/*sleep...*/
}
}
}
Ok(())
})
.map(|_| ())
.map_err(|_| ())
}
fn new(limit: u32, remaining_key: &str, limit_key: &str, client: ReqwestClient)
-> LimiterRef
{
let (chan_tx, chan_rx) = mpsc::unbounded();
let limiter = Limiter {
remaining: limit,
limit: limit,
in_transit: 0,
last_request: None,
remaining_key: remaining_key.to_owned(),
limit_key: limit_key.to_owned(),
queue: Vec::new(),
client: client,
chan: chan_tx,
};
let _ref = LimiterRef {
inner: Arc::new(Mutex::new(limiter))
};
return _ref;
}
fn queue(&self, request: Request)
-> impl Future<Item=Result<Response, reqwest::Error>, Error=oneshot::Canceled> {
let mut limits = self.inner.lock().unwrap();
let limit_ref = self.clone();
let (tx, rx) = futures::sync::oneshot::channel();
let job = RequestJob {
request: request,
on_complete: tx,
};
limits.queue.push(job);
rx
}
/* Insert the request into a queue */
/*
Ok(response)
})
}
*/
}
*/
|
