Add option to gzip compress request bodies (#239)

elasticsearch/Cargo.toml

@@ -31,7 +31,10 @@ bytes = "1"
 dyn-clone = "1"
 lazy_static = "1"
 percent-encoding = "2"
-reqwest = { version = "0.12", default-features = false, features = ["gzip", "json"] }
+reqwest = { version = "0.12", default-features = false, features = [
+    "gzip",
+    "json",
+] }
 url = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
@@ -40,6 +43,7 @@ serde_with = "3"
 
 #tokio = { version = "1", default-features = false, features = ["macros", "net", "time", "rt-multi-thread"] }
 void = "1"
+flate2 = "^1.0.34"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.tokio]
 version = "1.0"
@@ -48,14 +52,14 @@ features = ["macros", "net", "time", "rt-multi-thread"]
 
 [dev-dependencies]
 chrono = { version = "0.4", features = ["serde"] }
-clap = { version = "4", features = ["env"]}
+clap = { version = "4", features = ["env"] }
 failure = "0.1"
 futures = "0.3"
 http = "1"
 axum = "0.7"
 #hyper = { version = "1", features = ["server", "http1"] }
 os_type = "2"
-regex="1"
+regex = "1"
 #sysinfo = "0.31"
 textwrap = "0.16"
 xml-rs = "0.8"

elasticsearch/src/http/transport.rs

@@ -18,7 +18,10 @@
  */
 //! HTTP transport and connection components
 
-#[cfg(all(target_arch = "wasm32", any(feature = "native-tls", feature = "rustls-tls")))]
+#[cfg(all(
+    target_arch = "wasm32",
+    any(feature = "native-tls", feature = "rustls-tls")
+))]
 compile_error!("TLS features are not compatible with the wasm target");
 
 #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
@@ -30,8 +33,8 @@ use crate::{
     error::Error,
     http::{
         headers::{
-            HeaderMap, HeaderName, HeaderValue, ACCEPT, AUTHORIZATION, CONTENT_TYPE,
-            DEFAULT_ACCEPT, DEFAULT_CONTENT_TYPE, DEFAULT_USER_AGENT, USER_AGENT,
+            HeaderMap, HeaderName, HeaderValue, ACCEPT, AUTHORIZATION, CONTENT_ENCODING,
+            CONTENT_TYPE, DEFAULT_ACCEPT, DEFAULT_CONTENT_TYPE, DEFAULT_USER_AGENT, USER_AGENT,
         },
         request::Body,
         response::Response,
@@ -40,6 +43,7 @@ use crate::{
 };
 use base64::{engine::general_purpose::STANDARD as BASE64_STANDARD, write::EncoderWriter, Engine};
 use bytes::BytesMut;
+use flate2::{write::GzEncoder, Compression};
 use lazy_static::lazy_static;
 use serde::Serialize;
 use serde_json::Value;
@@ -147,6 +151,7 @@ pub struct TransportBuilder {
     credentials: Option<Credentials>,
     #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
     cert_validation: Option<CertificateValidation>,
+    request_body_compression: bool,
     #[cfg(not(target_arch = "wasm32"))]
     proxy: Option<Url>,
     #[cfg(not(target_arch = "wasm32"))]
@@ -172,6 +177,7 @@ impl TransportBuilder {
             credentials: None,
             #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
             cert_validation: None,
+            request_body_compression: false,
             #[cfg(not(target_arch = "wasm32"))]
             proxy: None,
             #[cfg(not(target_arch = "wasm32"))]
@@ -215,6 +221,12 @@ impl TransportBuilder {
         self
     }
 
+    /// Gzip compress the body of requests, adds the `Content-Encoding: gzip` header.
+    pub fn request_body_compression(mut self, enabled: bool) -> Self {
+        self.request_body_compression = enabled;
+        self
+    }
+
     /// Validation applied to the certificate provided to establish a HTTPS connection.
     /// By default, full validation is applied. When using a self-signed certificate,
     /// different validation can be applied.
@@ -335,6 +347,7 @@ impl TransportBuilder {
         Ok(Transport {
             client,
             conn_pool: self.conn_pool,
+            request_body_compression: self.request_body_compression,
             credentials: self.credentials,
             send_meta: self.meta_header,
         })
@@ -381,6 +394,7 @@ impl Connection {
 pub struct Transport {
     client: reqwest::Client,
     credentials: Option<Credentials>,
+    request_body_compression: bool,
     conn_pool: Arc<dyn ConnectionPool>,
     send_meta: bool,
 }
@@ -481,8 +495,7 @@ impl Transport {
         headers: HeaderMap,
         query_string: Option<&Q>,
         body: Option<B>,
-        #[allow(unused_variables)]
-        timeout: Option<Duration>,
+        #[allow(unused_variables)] timeout: Option<Duration>,
     ) -> Result<reqwest::RequestBuilder, Error>
     where
         B: Body,
@@ -552,7 +565,17 @@ impl Transport {
                 bytes_mut.split().freeze()
             };
 
-            request_builder = request_builder.body(bytes);
+            match self.request_body_compression {
+                true => {
+                    let mut encoder = GzEncoder::new(Vec::new(), Compression::default());
+                    encoder.write_all(&bytes)?;
+                    request_builder = request_builder.body(encoder.finish()?);
+                    request_builder = request_builder.header(CONTENT_ENCODING, "gzip");
+                }
+                false => {
+                    request_builder = request_builder.body(bytes);
+                }
+            }
         };
 
         if let Some(q) = query_string {
@@ -589,15 +612,17 @@ impl Transport {
         let connection = self.conn_pool.next();
 
         // Build node info request
-        let node_request = self.request_builder(
-            &connection,
-            Method::Get,
-            "_nodes/http?filter_path=nodes.*.http",
-            HeaderMap::default(),
-            None::<&()>,
-            None::<()>,
-            None,
-        ).unwrap();
+        let node_request = self
+            .request_builder(
+                &connection,
+                Method::Get,
+                "_nodes/http?filter_path=nodes.*.http",
+                HeaderMap::default(),
+                None::<&()>,
+                None::<()>,
+                None,
+            )
+            .unwrap();
 
         let scheme = connection.url.scheme();
         let resp = node_request.send().await.unwrap();