Crate rate_limits

source ·
Expand description

docs.rs

A crate for parsing HTTP rate limit headers as per the IETF draft. Inofficial implementations like the Github rate limit headers are also supported on a best effort basis. See vendor list for support.

use indoc::indoc;
use std::str::FromStr;
use time::{OffsetDateTime, Duration};
use rate_limits::{Vendor, RateLimit, ResetTime};

let headers = indoc! {"
    x-ratelimit-limit: 5000
    x-ratelimit-remaining: 4987
    x-ratelimit-reset: 1350085394
"};

assert_eq!(
    RateLimit::from_str(headers).unwrap(),
    RateLimit {
        limit: 5000,
        remaining: 4987,
        reset: ResetTime::DateTime(
            OffsetDateTime::from_unix_timestamp(1350085394).unwrap()
        ),
        window: Some(Duration::HOUR),
        vendor: Vendor::Github
    },
);

Also takes the Retry-After header into account when calculating the reset time.

http::HeaderMap is supported as well:

use std::str::FromStr;
use time::{OffsetDateTime, Duration};
use rate_limits::{Vendor, RateLimit, ResetTime};
use http::header::HeaderMap;

let mut headers = HeaderMap::new();
headers.insert("X-RATELIMIT-LIMIT", "5000".parse().unwrap());
headers.insert("X-RATELIMIT-REMAINING", "4987".parse().unwrap());
headers.insert("X-RATELIMIT-RESET", "1350085394".parse().unwrap());

assert_eq!(
    RateLimit::new(headers).unwrap(),
    RateLimit {
        limit: 5000,
        remaining: 4987,
        reset: ResetTime::DateTime(
            OffsetDateTime::from_unix_timestamp(1350085394).unwrap()
        ),
        window: Some(Duration::HOUR),
        vendor: Vendor::Github
    },
);

Other resources:

Structs

  • Limit
    A rate limit header
  • RateLimit
    HTTP rate limits as parsed from header values
  • RateLimitVariant
    A variant defines all relevant fields for parsing headers from a given vendor
  • Remaining
    A rate limit header for the number of remaining requests

Enums