commit ce808a97cd65ecc657a0bd5e0ab3619c82b860cc Author: mars Date: Wed Mar 23 14:44:06 2022 -0600 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ea8c4bf --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/target diff --git a/COPYING.txt b/COPYING.txt new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/COPYING.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..d16a6ed --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,509 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "atty" +version = "0.2.14" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8" +dependencies = [ + "hermit-abi", + "libc", + "winapi", +] + +[[package]] +name = "autocfg" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa" + +[[package]] +name = "bitflags" +version = "1.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a" + +[[package]] +name = "bumpalo" +version = "3.9.1" +source = 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SkipServerVerification { + fn new() -> Arc { + Arc::new(Self) + } +} + +impl rustls::client::ServerCertVerifier for SkipServerVerification { + fn verify_server_cert( + &self, + _end_entity: &rustls::Certificate, + _intermediates: &[rustls::Certificate], + _server_name: &rustls::ServerName, + _scts: &mut dyn Iterator, + _ocsp_response: &[u8], + _now: std::time::SystemTime, + ) -> Result { + Ok(rustls::client::ServerCertVerified::assertion()) + } +} + +#[rustfmt::skip] +#[derive(Debug, strum::Display, strum::EnumString)] +pub enum ResponseStatus { + #[strum(serialize="10")] Input, + #[strum(serialize="11")] SensitiveInput, + #[strum(serialize="20")] Success, + #[strum(serialize="30")] TemporaryRedirect, + #[strum(serialize="31")] PermanentRedirect, + #[strum(serialize="40")] TemporaryFailure, + #[strum(serialize="41")] ServerUnavailable, + #[strum(serialize="42")] CgiError, + #[strum(serialize="43")] ProxyError, + #[strum(serialize="44")] SlowDown, + #[strum(serialize="50")] PermanentFailure, + #[strum(serialize="51")] NotFound, + #[strum(serialize="52")] Gone, + #[strum(serialize="53")] ProxyRequestRefused, + #[strum(serialize="59")] BadRequest, + #[strum(serialize="60")] ClientCertRequired, + #[strum(serialize="61")] ClientCertNotAuthorized, + #[strum(serialize="62")] ClientCertNotValid, +} + +#[derive(Debug)] +pub struct Response { + pub status: ResponseStatus, + pub meta: String, + pub body: Vec, +} + +impl Response { + pub fn from_reader(reader: &mut impl std::io::Read) -> Self { + let mut response = Vec::new(); + reader.read_to_end(&mut response).unwrap(); + + let crlf = b"\r\n"; + let header_end = response + .windows(crlf.len()) + .position(|window| window == crlf) + .unwrap(); + + let status_code = std::str::from_utf8(&response[0..2]).unwrap(); + let status = ResponseStatus::try_from(status_code).unwrap(); + + let meta = String::from_utf8(response[3..header_end].to_vec()).unwrap(); + + let body_begin = header_end + crlf.len(); + let body = response[body_begin..].to_vec(); + + Self { status, meta, body } + } +} + +fn get_gemini(url: &Url) -> Response { + use rustls::{ClientConfig, ClientConnection}; + use std::io::Write; + use std::net::TcpStream; + + let config = ClientConfig::builder() + .with_safe_defaults() + .with_custom_certificate_verifier(SkipServerVerification::new()) + .with_no_client_auth(); + + let rc_config = Arc::new(config); + let host_str = url.host_str().unwrap(); + let server_name = host_str.try_into().unwrap(); + let mut conn = ClientConnection::new(rc_config, server_name).unwrap(); + + let port = url.port().unwrap_or(1965); + let mut sock = TcpStream::connect((host_str, port)).unwrap(); + + let mut tls = rustls::Stream::new(&mut conn, &mut sock); + + let request = format!("{}\r\n", url); + tls.write_all(request.as_bytes()).unwrap(); + + Response::from_reader(&mut tls) +} + +fn main() { + let args = Args::parse(); + + println!("Connecting to {}", args.url); + let response = get_gemini(&args.url); + println!("Received: {:?}", response); +}