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use reqwest::{header::ACCEPT, Client};
use serde::{Deserialize, Serialize};
mod resolver;
pub use crate::resolver::*;
#[cfg(feature = "async")]
mod async_resolver;
#[cfg(feature = "async")]
pub use crate::async_resolver::*;
#[cfg(test)]
mod tests;
#[derive(Debug, Serialize, Deserialize, PartialEq)]
pub struct Webfinger {
pub subject: String,
#[serde(default)]
pub aliases: Vec<String>,
pub links: Vec<Link>,
}
#[derive(Debug, Serialize, Deserialize, PartialEq)]
pub struct Link {
pub rel: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub href: Option<String>,
#[serde(skip_serializing_if = "Option::is_none")]
pub template: Option<String>,
#[serde(rename = "type", skip_serializing_if = "Option::is_none")]
pub mime_type: Option<String>,
}
#[derive(Debug, PartialEq)]
pub enum WebfingerError {
HttpError,
ParseError,
JsonError,
}
#[derive(Debug, PartialEq)]
pub enum Prefix {
Acct,
Group,
Custom(String),
}
impl From<&str> for Prefix {
fn from(s: &str) -> Prefix {
match s.to_lowercase().as_ref() {
"acct" => Prefix::Acct,
"group" => Prefix::Group,
x => Prefix::Custom(x.into()),
}
}
}
impl Into<String> for Prefix {
fn into(self) -> String {
match self {
Prefix::Acct => "acct".into(),
Prefix::Group => "group".into(),
Prefix::Custom(x) => x,
}
}
}
pub fn url_for(
prefix: Prefix,
acct: impl Into<String>,
with_https: bool,
) -> Result<String, WebfingerError> {
let acct = acct.into();
let scheme = if with_https { "https" } else { "http" };
let prefix: String = prefix.into();
acct.split('@')
.nth(1)
.ok_or(WebfingerError::ParseError)
.map(|instance| {
format!(
"{}://{}/.well-known/webfinger?resource={}:{}",
scheme, instance, prefix, acct
)
})
}
pub async fn resolve_with_prefix(
prefix: Prefix,
acct: impl Into<String>,
with_https: bool,
) -> Result<Webfinger, WebfingerError> {
let url = url_for(prefix, acct, with_https)?;
Client::new()
.get(&url[..])
.header(ACCEPT, "application/jrd+json, application/json")
.send()
.await
.map_err(|_| WebfingerError::HttpError)?
.json()
.await
.map_err(|_| WebfingerError::JsonError)
}
pub async fn resolve(
acct: impl Into<String>,
with_https: bool,
) -> Result<Webfinger, WebfingerError> {
let acct = acct.into();
let mut parsed = acct.splitn(2, ':');
let first = parsed.next().ok_or(WebfingerError::ParseError)?;
if first.contains('@') {
resolve_with_prefix(Prefix::Acct, acct, with_https).await
} else if let Some(other) = parsed.next() {
resolve_with_prefix(Prefix::from(first), other, with_https).await
} else {
resolve_with_prefix(Prefix::Acct, first, with_https).await
}
}
#[derive(Debug, PartialEq)]
pub enum ResolverError {
InvalidResource,
WrongDomain,
NotFound,
}