simplify http library

src/agent/api/http.rs

@@ -5,7 +5,7 @@
 
 use anyhow::{Context, Result};
 use bytes::Bytes;
-use http_body_util::{BodyExt, Full, Empty};
+use http_body_util::{BodyExt, Full};
 use hyper::body::Incoming;
 use hyper::{Request, StatusCode};
 use hyper_util::rt::TokioIo;
@@ -47,27 +47,19 @@ impl HttpClient {
 
     /// Send a GET request with custom headers.
     pub async fn get_with_headers(&self, url: &str, headers: &[(&str, &str)]) -> Result<HttpResponse> {
-        let mut builder = Request::get(url);
-        for &(k, v) in headers {
-            builder = builder.header(k, v);
+        self.send(url, "GET", headers, Bytes::new()).await
     }
-        let req = builder.body(Empty::<Bytes>::new())
-            .context("building GET request")?;
-        self.send_empty(req).await
-    }
-
 
     /// Send a POST request with URL-encoded form data.
     pub async fn post_form(&self, url: &str, params: &[(&str, &str)]) -> Result<HttpResponse> {
         let body = serde_urlencoded::to_string(params).context("encoding form")?;
-        let req = Request::post(url)
-            .header("content-type", "application/x-www-form-urlencoded")
-            .body(Full::new(Bytes::from(body)))
-            .context("building form POST")?;
-        self.send_full(req).await
+        self.send(url, "POST",
+            &[("content-type", "application/x-www-form-urlencoded")],
+            Bytes::from(body),
+        ).await
     }
 
-    /// Send a request with headers pre-set. JSON body.
+    /// Send a request with JSON body.
     pub async fn send_json(
         &self,
         method: &str,
@@ -76,66 +68,59 @@ impl HttpClient {
         body: &impl serde::Serialize,
     ) -> Result<HttpResponse> {
         let json = serde_json::to_vec(body).context("serializing JSON body")?;
-        let mut builder = Request::builder()
-            .method(method)
-            .uri(url)
-            .header("content-type", "application/json");
-        for &(k, v) in headers {
-            builder = builder.header(k, v);
-        }
-        let req = builder.body(Full::new(Bytes::from(json)))
-            .context("building request")?;
-        self.send_full(req).await
+        let mut all_headers = vec![("content-type", "application/json")];
+        all_headers.extend_from_slice(headers);
+        self.send(url, method, &all_headers, Bytes::from(json)).await
     }
 
-    async fn connect(&self, url: &str) -> Result<(bool, TokioIo<Box<dyn IoStream>>)> {
+    /// Core send: parse URL, connect, build request with correct
+    /// path-only URI and Host header, send, return response.
+    async fn send(
+        &self,
+        url: &str,
+        method: &str,
+        headers: &[(&str, &str)],
+        body: Bytes,
+    ) -> Result<HttpResponse> {
         let uri: http::Uri = url.parse().context("parsing URL")?;
         let host = uri.host().context("URL has no host")?.to_string();
         let is_https = uri.scheme_str() == Some("https");
         let port = uri.port_u16().unwrap_or(if is_https { 443 } else { 80 });
 
+        // Connect
         let tcp = tokio::time::timeout(
             self.connect_timeout,
-            TcpStream::connect(format!("{}:{}", host, port)),
+            TcpStream::connect(format!("{host}:{port}")),
         ).await
             .context("connect timeout")?
             .context("TCP connect")?;
 
-        if is_https {
+        let io: TokioIo<Box<dyn IoStream>> = if is_https {
             let server_name = rustls::pki_types::ServerName::try_from(host.clone())
-                .map_err(|e| anyhow::anyhow!("invalid server name: {}", e))?;
+                .map_err(|e| anyhow::anyhow!("invalid server name: {e}"))?;
             let connector = tokio_rustls::TlsConnector::from(self.tls.clone());
             let tls = connector.connect(server_name.to_owned(), tcp).await
                 .context("TLS handshake")?;
-            Ok((is_https, TokioIo::new(Box::new(tls) as Box<dyn IoStream>)))
+            TokioIo::new(Box::new(tls) as Box<dyn IoStream>)
         } else {
-            Ok((is_https, TokioIo::new(Box::new(tcp) as Box<dyn IoStream>)))
-        }
+            TokioIo::new(Box::new(tcp) as Box<dyn IoStream>)
+        };
+
+        // Build request with path-only URI and Host header
+        let path_and_query = uri.path_and_query()
+            .map(|pq| pq.as_str())
+            .unwrap_or("/");
+        let mut builder = Request::builder()
+            .method(method)
+            .uri(path_and_query)
+            .header("host", &host);
+        for &(k, v) in headers {
+            builder = builder.header(k, v);
         }
+        let req = builder.body(Full::new(body))
+            .context("building request")?;
 
-    async fn send_full(&self, req: Request<Full<Bytes>>) -> Result<HttpResponse> {
-        let url = req.uri().to_string();
-        let (_is_https, io) = self.connect(&url).await?;
-
-        let (mut sender, conn) = hyper::client::conn::http1::handshake(io).await
-            .context("HTTP handshake")?;
-        tokio::spawn(conn);
-
-        let resp = tokio::time::timeout(
-            self.request_timeout,
-            sender.send_request(req),
-        ).await
-            .context("request timeout")?
-            .context("sending request")?;
-
-        let (parts, body) = resp.into_parts();
-        Ok(HttpResponse { parts, body })
-    }
-
-    async fn send_empty(&self, req: Request<Empty<Bytes>>) -> Result<HttpResponse> {
-        let url = req.uri().to_string();
-        let (_is_https, io) = self.connect(&url).await?;
-
+        // Send
         let (mut sender, conn) = hyper::client::conn::http1::handshake(io).await
             .context("HTTP handshake")?;
         tokio::spawn(conn);