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use http::uri::{Builder, InvalidUri, PathAndQuery, Scheme, Uri};
use multiaddr::{Multiaddr, Protocol};
use std::{
fs,
net::{SocketAddr, SocketAddrV4, SocketAddrV6},
str::FromStr,
};
const VERSION_PATH_V0: &str = "/api/v0";
fn build_base_path(builder: Builder) -> Result<Uri, http::Error> {
builder.path_and_query(VERSION_PATH_V0).build()
}
pub trait TryFromUri: Sized {
fn build_with_base_uri(uri: Uri) -> Self;
fn from_str(uri: &str) -> Result<Self, InvalidUri> {
let uri: Uri = uri.parse()?;
let mut parts = uri.into_parts();
parts.path_and_query = Some(PathAndQuery::from_static(VERSION_PATH_V0));
Ok(Self::build_with_base_uri(Uri::from_parts(parts).unwrap()))
}
fn from_host_and_port(scheme: Scheme, host: &str, port: u16) -> Result<Self, http::Error> {
let authority = format!("{}:{}", host, port);
let builder = Builder::new().scheme(scheme).authority(&authority[..]);
build_base_path(builder).map(Self::build_with_base_uri)
}
fn from_ipv4(scheme: Scheme, addr: SocketAddrV4) -> Result<Self, http::Error> {
let authority = format!("{}", addr);
let builder = Builder::new().scheme(scheme).authority(&authority[..]);
build_base_path(builder).map(Self::build_with_base_uri)
}
fn from_ipv6(scheme: Scheme, addr: SocketAddrV6) -> Result<Self, http::Error> {
let authority = format!("{}", addr);
let builder = Builder::new().scheme(scheme).authority(&authority[..]);
build_base_path(builder).map(Self::build_with_base_uri)
}
fn from_socket(scheme: Scheme, socket_addr: SocketAddr) -> Result<Self, http::Error> {
match socket_addr {
SocketAddr::V4(addr) => Self::from_ipv4(scheme, addr),
SocketAddr::V6(addr) => Self::from_ipv6(scheme, addr),
}
}
fn from_multiaddr(multiaddr: Multiaddr) -> Result<Self, multiaddr::Error> {
let mut scheme: Option<Scheme> = None;
let mut port: Option<u16> = None;
for addr_component in multiaddr.iter() {
match addr_component {
Protocol::Tcp(tcpport) => port = Some(tcpport),
Protocol::Http => scheme = Some(Scheme::HTTP),
Protocol::Https => scheme = Some(Scheme::HTTPS),
_ => (),
}
}
let scheme = scheme.unwrap_or(Scheme::HTTP);
if let Some(port) = port {
for addr_component in multiaddr.iter() {
match addr_component {
Protocol::Tcp(_) | Protocol::Http | Protocol::Https => (),
Protocol::Ip4(v4addr) => {
return Ok(Self::from_ipv4(scheme, SocketAddrV4::new(v4addr, port)).unwrap())
}
Protocol::Ip6(v6addr) => {
return Ok(
Self::from_ipv6(scheme, SocketAddrV6::new(v6addr, port, 0, 0)).unwrap(),
)
}
Protocol::Dns(ref hostname) => {
return Ok(Self::from_host_and_port(scheme, hostname, port).unwrap())
}
Protocol::Dns4(ref v4host) => {
return Ok(Self::from_host_and_port(scheme, v4host, port).unwrap())
}
Protocol::Dns6(ref v6host) => {
return Ok(Self::from_host_and_port(scheme, v6host, port).unwrap())
}
_ => {
return Err(multiaddr::Error::InvalidMultiaddr);
}
}
}
}
Err(multiaddr::Error::InvalidMultiaddr)
}
fn from_multiaddr_str(multiaddr: &str) -> Result<Self, multiaddr::Error> {
multiaddr::from_url(multiaddr)
.map_err(|e| multiaddr::Error::ParsingError(Box::new(e)))
.or_else(|_| Multiaddr::from_str(multiaddr))
.and_then(Self::from_multiaddr)
}
#[inline]
fn from_ipfs_config() -> Option<Self> {
dirs::home_dir()
.map(|home_dir| home_dir.join(".ipfs").join("api"))
.and_then(|multiaddr_path| fs::read_to_string(&multiaddr_path).ok())
.and_then(|multiaddr_str| Self::from_multiaddr_str(&multiaddr_str).ok())
}
}
#[cfg(test)]
mod tests {
use crate::TryFromUri;
use http::uri::{Scheme, Uri};
#[derive(Debug)]
struct StringWrapper(String);
impl TryFromUri for StringWrapper {
fn build_with_base_uri(uri: Uri) -> Self {
StringWrapper(uri.to_string())
}
}
macro_rules! test_from_value_fn_ok {
([$method: path]: $($f: ident ($($args: expr),+) => $output: expr),+) => {
$(
#[test]
fn $f() {
let result: Result<StringWrapper, _> = $method($($args),+);
assert!(
result.is_ok(),
"should be ok but failed with error: {:?}", result.unwrap_err()
);
let StringWrapper(result) = result.unwrap();
assert!(
result == $output,
"got: ({}) expected: ({})", result, $output
);
}
)+
};
}
test_from_value_fn_ok!(
[TryFromUri::from_str]:
test_from_str_0_ok ("http://localhost:5001") => "http://localhost:5001/api/v0",
test_from_str_1_ok ("https://ipfs.io:9001") => "https://ipfs.io:9001/api/v0"
);
test_from_value_fn_ok!(
[TryFromUri::from_host_and_port]:
test_from_host_and_port_0_ok (Scheme::HTTP, "localhost", 5001) => "http://localhost:5001/api/v0",
test_from_host_and_port_1_ok (Scheme::HTTP, "ipfs.io", 9001) => "http://ipfs.io:9001/api/v0"
);
test_from_value_fn_ok!(
[TryFromUri::from_multiaddr_str]:
test_from_multiaddr_str_0_ok ("http://localhost:5001/") => "http://localhost:5001/api/v0",
test_from_multiaddr_str_1_ok ("https://ipfs.io:9001/") => "https://ipfs.io:9001/api/v0",
test_from_multiaddr_str_2_ok ("/ip4/127.0.0.1/tcp/5001/http") => "http://127.0.0.1:5001/api/v0",
test_from_multiaddr_str_3_ok ("/ip6/0:0:0:0:0:0:0:0/tcp/5001/http") => "http://[::]:5001/api/v0"
);
}