feat: Allow FileIO to reuse http client (#544)

Signed-off-by: Xuanwo <github@xuanwo.io>

crates/iceberg/src/io/storage.rs

@@ -38,6 +38,10 @@ pub(crate) enum Storage {
         /// s3 storage could have `s3://` and `s3a://`.
         /// Storing the scheme string here to return the correct path.
         scheme_str: String,
+        /// uses the same client for one FileIO Storage.
+        ///
+        /// TODO: allow users to configure this client.
+        client: reqwest::Client,
         config: Arc<S3Config>,
     },
     #[cfg(feature = "storage-gcs")]
@@ -58,6 +62,7 @@ impl Storage {
             #[cfg(feature = "storage-s3")]
             Scheme::S3 => Ok(Self::S3 {
                 scheme_str,
+                client: reqwest::Client::new(),
                 config: super::s3_config_parse(props)?.into(),
             }),
             #[cfg(feature = "storage-gcs")]
@@ -110,8 +115,12 @@ impl Storage {
                 }
             }
             #[cfg(feature = "storage-s3")]
-            Storage::S3 { scheme_str, config } => {
-                let op = super::s3_config_build(config, path)?;
+            Storage::S3 {
+                scheme_str,
+                client,
+                config,
+            } => {
+                let op = super::s3_config_build(client, config, path)?;
                 let op_info = op.info();
 
                 // Check prefix of s3 path.

crates/iceberg/src/io/storage_s3.rs

@@ -17,8 +17,9 @@
 
 use std::collections::HashMap;
 
+use opendal::raw::HttpClient;
 use opendal::services::S3Config;
-use opendal::Operator;
+use opendal::{Configurator, Operator};
 use url::Url;
 
 use crate::{Error, ErrorKind, Result};
@@ -106,7 +107,11 @@ pub(crate) fn s3_config_parse(mut m: HashMap<String, String>) -> Result<S3Config
 }
 
 /// Build new opendal operator from give path.
-pub(crate) fn s3_config_build(cfg: &S3Config, path: &str) -> Result<Operator> {
+pub(crate) fn s3_config_build(
+    client: &reqwest::Client,
+    cfg: &S3Config,
+    path: &str,
+) -> Result<Operator> {
     let url = Url::parse(path)?;
     let bucket = url.host_str().ok_or_else(|| {
         Error::new(
@@ -115,7 +120,13 @@ pub(crate) fn s3_config_build(cfg: &S3Config, path: &str) -> Result<Operator> {
         )
     })?;
 
-    let mut cfg = cfg.clone();
-    cfg.bucket = bucket.to_string();
-    Ok(Operator::from_config(cfg)?.finish())
+    let builder = cfg
+        .clone()
+        .into_builder()
+        // Set bucket name.
+        .bucket(bucket)
+        // Set http client we want to use.
+        .http_client(HttpClient::with(client.clone()));
+
+    Ok(Operator::new(builder)?.finish())
 }