~vpzom/crepo: Initial commit

4 files changed, 1273 insertions(+), 0 deletions(-)

A .gitignore
A Cargo.lock
A Cargo.toml
A src/main.rs

A  => .gitignore +2 -0

@@ 1,2 @@
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A  => Cargo.lock +1103 -0

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+"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+"checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"

A  => Cargo.toml +15 -0

@@ 1,15 @@
+[package]
+name = "crepo"
+version = "0.1.0"
+authors = ["Colin Reeder <colin@vpzom.click>"]
+edition = "2018"
+
+[dependencies]
+tokio = "0.1.21"
+hyper = "0.12.30"
+futures = "0.1.27"
+hyper-tls = "0.3.2"
+serde = "1.0.92"
+serde_derive = "1.0.92"
+serde_json = "1.0.39"
+percent-encoding = "1.0.1"

A  => src/main.rs +153 -0

@@ 1,153 @@
+use futures::{Future, IntoFuture, Stream};
+
+#[derive(serde_derive::Deserialize)]
+struct CrateInfoResponse {
+    #[serde(rename = "crate")]
+    crate_: CrateInfo,
+}
+
+#[derive(serde_derive::Deserialize)]
+struct CrateInfo {
+    repository: Option<String>,
+}
+
+fn handle_query(
+    client: hyper::Client<hyper_tls::HttpsConnector<hyper::client::HttpConnector>>,
+    req_path: &str,
+) -> impl Future<Item = hyper::Response<hyper::Body>, Error = hyper::Error> {
+    let path = format!(
+        "/api/v1/crates/{}",
+        percent_encoding::utf8_percent_encode(req_path, percent_encoding::PATH_SEGMENT_ENCODE_SET)
+    );
+    let path_ref: &str = &path;
+    let req_path = req_path.to_owned();
+    hyper::Uri::builder()
+        .scheme("https")
+        .authority("crates.io")
+        .path_and_query(path_ref)
+        .build()
+        .map_err(|err| format!("Failed to construct API URI: {:?}", err))
+        .into_future()
+        .and_then(move |uri| {
+            let mut req = hyper::Request::new("".into());
+            *req.uri_mut() = uri;
+            req.headers_mut().insert(
+                hyper::header::USER_AGENT,
+                hyper::header::HeaderValue::from_static("crepo.top"),
+            );
+
+            client
+                .request(req)
+                .map_err(|err| format!("Failed to make API request: {:?}", err))
+                .and_then(|res| {
+                    if res.status() == hyper::StatusCode::OK {
+                        Ok(Some(res.into_body()))
+                    } else if res.status() == hyper::StatusCode::NOT_FOUND {
+                        Ok(None)
+                    } else {
+                        Err(format!(
+                            "Unexpected response code from API: {}",
+                            res.status()
+                        ))
+                    }
+                })
+        })
+        .and_then(|body| match body {
+            Some(body) => futures::future::Either::A(
+                body.concat2()
+                    .map_err(|err| format!("Failed to read API response: {:?}", err))
+                    .and_then(|body| {
+                        serde_json::from_slice(&body)
+                            .map_err(|err| format!("Failed to parse API response: {:?}", err))
+                    })
+                    .map(Some),
+            ),
+            None => futures::future::Either::B(futures::future::ok(None)),
+        })
+        .and_then(move |body: Option<CrateInfoResponse>| match body {
+            Some(body) => {
+                let (text, url) = match body.crate_.repository {
+                    Some(url) => (format!("Redirecting to {}", url), url),
+                    None => {
+                        let url = format!("https://crates.io/crates/{}", req_path);
+                        (format!("No repository found, redirecting to {}", url), url)
+                    }
+                };
+
+                url.parse()
+                    .map(|location| {
+                        let mut resp = hyper::Response::new(text.into());
+                        *resp.status_mut() = hyper::StatusCode::FOUND;
+                        resp.headers_mut().insert(hyper::header::LOCATION, location);
+
+                        resp
+                    })
+                    .map_err(|err| format!("Failed to set Location header: {:?}", err))
+            }
+            None => {
+                let mut resp = hyper::Response::new("Crate not found.".into());
+                *resp.status_mut() = hyper::StatusCode::NOT_FOUND;
+                resp.headers_mut().insert(
+                    hyper::header::CONTENT_TYPE,
+                    hyper::header::HeaderValue::from_static("text/plain"),
+                );
+
+                Ok(resp)
+            }
+        })
+        .or_else(|err| {
+            eprintln!("Error: {:?}", err);
+
+            let mut resp = hyper::Response::new("Internal Server Error".into());
+            *resp.status_mut() = hyper::StatusCode::INTERNAL_SERVER_ERROR;
+
+            Ok(resp)
+        })
+}
+
+fn main() {
+    let port = 2727;
+
+    let http_client = hyper::Client::builder()
+        .build(hyper_tls::HttpsConnector::new(4).expect("HttpsConnector initialization failed"));
+
+    tokio::run(
+        hyper::Server::bind(&std::net::SocketAddr::new(
+            std::net::Ipv6Addr::UNSPECIFIED.into(),
+            port,
+        ))
+        .serve(move || {
+            hyper::service::service_fn({
+                let http_client = http_client.clone();
+                move |req| {
+                    let mut path = req.uri().path();
+                    println!("{}", path);
+                    if path.len() > 0 && path.starts_with("/") {
+                        path = &path[1..];
+                    }
+                    let path = path;
+
+                    if path.len() == 0 {
+                        futures::future::Either::A(futures::future::ok(hyper::Response::new(
+                            hyper::Body::from("Usage: https://crepo.top/{crate}"),
+                        )))
+                    } else {
+                        if path.contains("/") || path.contains(".") {
+                            // quick check for invalid crate names
+                            let mut resp = hyper::Response::new("Invalid crate name.".into());
+                            *resp.status_mut() = hyper::StatusCode::NOT_FOUND;
+                            resp.headers_mut().insert(
+                                hyper::header::CONTENT_TYPE,
+                                hyper::header::HeaderValue::from_static("text/plain"),
+                            );
+                            futures::future::Either::A(futures::future::ok(resp))
+                        } else {
+                            futures::future::Either::B(handle_query(http_client.clone(), path))
+                        }
+                    }
+                }
+            })
+        })
+        .map_err(|err| panic!("Server execution failed: {:?}", err)),
+    );
+}