Crate unleash_proxy

Copyright 2020-2022 Cognite AS

The included binary unleash-proxy is equivalent to this code:

#[tokio::main]
async fn main() -> anyhow::Result<()> {
  // Add deployment specific concerns here
  env_logger::init();
  unleash_proxy::main().await
}

Here is an example adding a custom strategy:

use std::collections::{HashMap, HashSet};
use std::hash::BuildHasher;
use serde::{Deserialize, Serialize};
use unleash_api_client::context::Context;
use unleash_api_client::strategy;

pub fn example<S: BuildHasher>(
    parameters: Option<HashMap<String, String, S>>,
) -> strategy::Evaluate {
    let mut items: HashSet<String> = HashSet::new();
    if let Some(parameters) = parameters {
        if let Some(item_list) = parameters.get("exampleParameter") {
            for item in item_list.split(',') {
                items.insert(item.trim().into());
            }
        }
    }
    Box::new(move |context: &Context| -> bool {
        matches!(
            context
                .properties
                .get("exampleProperty")
                .map(|item| items.contains(item)),
            Some(true)
        )
    })
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
  // Add deployment specific concerns here
  env_logger::init();
  unleash_proxy::ProxyBuilder::default().
      strategy("example", Box::new(&example)).execute().await
}

Structs

ProxyBuilder

Permits customising the Proxy behaviour. See the crate level docs for examples.

Functions

main

Core workhorse for the proxy. Code in this function is generic across different deployment configurations e.g. logging, tracing, metrics implementations. See the crate level documentation for examples.