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use serde::de::{Unexpected, Visitor};
use serde::{de, Deserialize, Deserializer};
use std::fmt;
const DEFAULT_HTTP_INTERFACE: &str = "[::]";
#[derive(Deserialize, serde::Serialize, Clone, Debug)]
#[serde(deny_unknown_fields)]
pub struct Config {
#[serde(deserialize_with = "deserialize_http_port")]
pub http_port: String,
__path__: Option<String>,
__required__: Option<bool>,
}
impl From<&Config> for serde_json::Value {
fn from(c: &Config) -> Self {
serde_json::to_value(c).unwrap()
}
}
fn deserialize_http_port<'de, D>(deserializer: D) -> Result<String, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_any(HttpPortVisitor)
}
struct HttpPortVisitor;
impl<'de> Visitor<'de> for HttpPortVisitor {
type Value = String;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str(r#"either a port number as an integer or a string, either a string with format "<local_ip>:<port_number>""#)
}
fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E>
where
E: de::Error,
{
Ok(format!("{}:{}", DEFAULT_HTTP_INTERFACE, value))
}
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
let parts: Vec<&str> = value.split(':').collect();
if parts.len() > 2 {
return Err(E::invalid_value(Unexpected::Str(value), &self));
}
let (interface, port) = if parts.len() == 1 {
(DEFAULT_HTTP_INTERFACE, parts[0])
} else {
(parts[0], parts[1])
};
if port.parse::<u32>().is_err() {
return Err(E::invalid_value(Unexpected::Str(port), &self));
}
Ok(format!("{}:{}", interface, port))
}
}