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#1079 in Web programming

Download history 18/week @ 2023-12-04 23/week @ 2023-12-11 4/week @ 2023-12-18 7/week @ 2023-12-25 10/week @ 2024-01-08 14/week @ 2024-01-29 5/week @ 2024-02-05 10/week @ 2024-02-12 10/week @ 2024-02-19 49/week @ 2024-02-26 23/week @ 2024-03-04 25/week @ 2024-03-11 28/week @ 2024-03-18

126 downloads per month
Used in 5 crates (3 directly)

MIT license

7KB

ENV Url

License Cargo Documentation

Env-composable service urls complete with key overrides as to facilitate maximum flexibility and to simplify integration with kubernetes.

Env mapping behaviors

ENV
{PREFIX}_URL set service url, disregarding other overrides
{PREFIX}_URL_ENV override {PREFIX}_URL env mapping
{PREFIX}_SCHEME set url scheme component
{PREFIX}_SCHEME_ENV override {PREFIX}_SCHEME env mapping
{PREFIX}_HOST set url host component
{PREFIX}_HOST_ENV override {PREFIX}_HOST env mapping
{PREFIX}_PATH set url path component
{PREFIX}_PATH_ENV override {PREFIX}_PATH env mapping
{PREFIX}_QUERY set url query component
{PREFIX}_QUERY_ENV override {PREFIX}_QUERY env mapping
{PREFIX}_USERINFO set url userinfo component
{PREFIX}_USERINFO_ENV override {PREFIX}_USERINFO env mapping

Example

use env_url::*;

#[derive(EnvURL)]
#[env_url(env_prefix = "REDIS", default = "redis://127.0.0.1:6379")]
pub struct RedisDB;

let service_url = RedisDB::service_url();

Kubernetes usage

As kubernetes can set services to env variables for service discovery, it's very useful to be able to override the env mappings like so

REDIS_HOST_ENV: STAGE_REDIS_MASTER_PORT_6379_TCP_ADDR
REDIS_PORT_ENV: STAGE_REDIS_MASTER_SERVICE_PORT_REDIS

Dependencies

~2–2.8MB
~85K SLoC