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extern crate reqwest;
extern crate serde;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
use reqwest::{header::ACCEPT, Client};
#[cfg(test)]
mod tests;
#[derive(Debug, Serialize, Deserialize, PartialEq)]
pub struct Webfinger {
pub subject: String,
pub aliases: Vec<String>,
pub links: Vec<Link>
}
#[derive(Debug, Serialize, Deserialize, PartialEq)]
pub struct Link {
pub rel: String,
pub href: Option<String>,
pub template: Option<String>,
#[serde(rename="type")]
pub mime_type: Option<String>
}
#[derive(Debug, PartialEq)]
pub enum WebfingerError {
HttpError,
ParseError,
JsonError
}
pub fn url_for_acct<T: Into<String>>(acct: T, with_https: bool) -> Result<String, WebfingerError> {
let acct = acct.into();
let scheme = if with_https {
"https"
} else {
"http"
};
acct.split("@")
.nth(1)
.ok_or(WebfingerError::ParseError)
.map(|instance| format!("{}://{}/.well-known/webfinger?resource=acct:{}", scheme, instance, acct))
}
pub fn resolve<T: Into<String>>(acct: T, with_https: bool) -> Result<Webfinger, WebfingerError> {
let url = url_for_acct(acct, with_https)?;
Client::new()
.get(&url[..])
.header(ACCEPT, "application/jrd+json")
.send()
.map_err(|_| WebfingerError::HttpError)
.and_then(|mut r| r.text().map_err(|_| WebfingerError::HttpError))
.and_then(|res| serde_json::from_str(&res[..]).map_err(|_| WebfingerError::JsonError))
}
#[derive(Debug, PartialEq)]
pub enum ResolverError {
InvalidResource,
WrongInstance,
NotFound
}
pub trait Resolver<R> {
fn instance_domain<'a>() -> &'a str;
fn find(acct: String, resource_repo: R) -> Result<Webfinger, ResolverError>;
fn endpoint<T: Into<String>>(resource: T, resource_repo: R) -> Result<Webfinger, ResolverError> {
let resource = resource.into();
let mut parsed_query = resource.splitn(2, ":");
parsed_query.next()
.ok_or(ResolverError::InvalidResource)
.and_then(|res_type| {
if res_type == "acct" {
parsed_query.next().ok_or(ResolverError::InvalidResource)
} else {
Err(ResolverError::InvalidResource)
}
})
.and_then(|res| {
let mut parsed_res = res.split("@");
parsed_res.next()
.ok_or(ResolverError::InvalidResource)
.and_then(|user| {
parsed_res.next()
.ok_or(ResolverError::InvalidResource)
.and_then(|res_domain| {
if res_domain == Self::instance_domain() {
Self::find(user.to_string(), resource_repo)
} else {
Err(ResolverError::WrongInstance)
}
})
})
})
}
}