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use serde_with::DisplayFromStr;
use reqwest::Url;
use std::error::Error;
use std::net::IpAddr;
use std::str::FromStr;
use serde::{Deserialize, Serialize};
use serde_with::serde_as;
use crate::ip_service::IpServiceProvider::IDENTME;
#[derive(Debug, Deserialize, PartialEq, Serialize)]
#[serde(tag = "type")]
pub enum IpServiceProvider {
IDENTME(IdentMe)
}
impl Default for IpServiceProvider {
fn default() -> Self {
IDENTME(IdentMe::default())
}
}
pub struct IpService {}
impl IpService {
pub(crate) async fn resolve(config: &impl IpServiceConfiguration) -> Result<IpAddr, Box<dyn Error>> {
let response = reqwest::get(config.get_service_url()).await.unwrap();
Ok(IpAddr::from_str(&response.text().await.unwrap())?)
}
}
pub trait IpServiceConfiguration {
fn get_service_url(&self) -> Url;
}
#[serde_as]
#[derive(Debug, Serialize, Deserialize, PartialEq)]
pub struct IdentMe {
#[serde_as(as = "DisplayFromStr")]
url: Url
}
impl Default for IdentMe {
fn default() -> Self {
Self { url: Url::parse("https://v4.ident.me/").unwrap() }
}
}
impl IpServiceConfiguration for IdentMe {
fn get_service_url(&self) -> Url {
self.url.clone()
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::net::Ipv4Addr;
use wiremock::matchers::{method, path};
use wiremock::{Mock, MockServer, ResponseTemplate};
async fn setup_ipv4_service(service_path: &str, response: &str) -> MockServer {
let service = MockServer::start().await;
Mock::given(method("GET"))
.and(path(service_path))
.respond_with(
ResponseTemplate::new(200)
.insert_header("Content-Type", "text/plain; charset=utf-8")
.set_body_string(response),
)
.mount(&service)
.await;
service
}
#[tokio::test]
async fn successful_ipv4_address_resolution() -> Result<(), Box<dyn Error>> {
let service_path = "get-my-ip-address";
let service_response = "17.5.7.8";
let ip_service = setup_ipv4_service(service_path, service_response).await;
let service_config = MockConfig::new(&ip_service, service_path);
let actual = IpService::resolve(&service_config).await?;
assert_eq!(actual, IpAddr::V4(Ipv4Addr::new(17, 5, 7, 8)));
assert_eq!(1, ip_service.received_requests().await.unwrap().len());
Ok(())
}
struct MockConfig {
service_url: Url,
}
impl MockConfig {
fn new(server: &MockServer, path: &str) -> Self {
Self {
service_url: Url::parse(format!("{}/{}", server.uri(), path).as_str()).unwrap(),
}
}
}
impl IpServiceConfiguration for MockConfig {
fn get_service_url(&self) -> Url {
self.service_url.clone()
}
}
}
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