Torch Object Storage
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- Documentation
Torch Object StorageSDK ReferenceRustObject interfaceBasic operationCopyObject（Rust SDK）
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CopyObject（Rust SDK）
Copy pageDownload PDFCopyObject（Rust SDK）
The copy_object interface copies objects within the same region, either between the same bucket or different buckets. This article explains how to use the copy_object interface in the Rust SDK to copy objects, supporting metadata replacement, server-side encryption, and version control.
Notes
- You need to provide the region and endpoint in the sample code according to your actual situation. For detailed information, see region and endpoint.
- To prevent key leakage, the sample code reads the Access Key ID and Secret Access Key from environment variables. Before using the SDK, you need to configure long-term access credentials. For details, see configure long-term access credentials.
- If the source object size exceeds 5 GiB, use the upload_part_copy interface instead, as copy_object only supports sizes between 0 and 5 GiB.
- If the source object is stored as ARCHIVE, COLD_ARCHIVE, or DEEP_COLD_ARCHIVE, perform a restore operation before calling copy_object.
Permissions required
The Volcengine main account has all permissions by default, but IAM users have no permissions by default. If a sub-account needs to perform the copy_object operation, the Volcano Engine main account must grant the following permissions to the sub-account through IAM policy and bucket policy:
tos:PutObject
Code example
Copy object within the same bucket
use async_trait::async_trait;
use futures_core::future::BoxFuture;
use std::env;
use std::future::Future;
use std::time::Duration;
use tokio::runtime::Handle;
use ve_tos_rust_sdk::common::init_tracing_log;
use ve_tos_rust_sdk::asynchronous::bucket::BucketAPI;
use ve_tos_rust_sdk::asynchronous::object::ObjectAPI;
use ve_tos_rust_sdk::asynchronous::tos;
use ve_tos_rust_sdk::asynchronous::tos::AsyncRuntime;
use ve_tos_rust_sdk::object::{CopyObjectInput, PutObjectFromBufferInput};
use ve_tos_rust_sdk::error::TosError;
#[derive(Debug, Default)]
pub struct TokioRuntime {}
#[async_trait]
impl AsyncRuntime for TokioRuntime {
type JoinError = tokio::task::JoinError;
async fn sleep(&self, duration: Duration) {
tokio::time::sleep(duration).await;
}
fn spawn<'a, F>(&self, future: F) -> BoxFuture<'a, Result<F::Output, Self::JoinError>>
where
F: Future + Send + 'static,
F::Output: Send + 'static,
{
Box::pin(Handle::current().spawn(future))
}
fn block_on<F: Future>(&self, future: F) -> F::Output {
Handle::current().block_on(future)
}
}
#[tokio::main]
async fn main() {
let _guard = init_tracing_log("info", "temp/logs", "app.log");
let ak = env::var("TOS_ACCESS_KEY").unwrap_or("".to_string());
let sk = env::var("TOS_SECRET_KEY").unwrap_or("".to_string());
let endpoint = "https://tos-cn-beijing.volces.com";
let region = "cn-beijing";
let client = tos::builder::<TokioRuntime>()
.connection_timeout(3000)
.request_timeout(10000)
.max_retry_count(3)
.ak(ak)
.sk(sk)
.region(region)
.endpoint(endpoint)
.build().unwrap();
// Upload source object
let source_key = "source-object.txt";
// Same bucket copy
let copy_input = CopyObjectInput::new("example-bucket", "copied-object.txt", "example-bucket", source_key);
let output = client.copy_object(©_input).await;
match output {
Ok(res) => {
println!("Copy object succeeded");
println!("etag: {}", res.etag());
if let Some(lm) = res.last_modified() { println!("last_modified: {}", lm); }
println!("copy_source_version_id: {}", res.copy_source_version_id());
println!("version_id: {}", res.version_id());
}
Err(err) => {
match err {
TosError::TosClientError { message, .. } => println!("Client error: {}", message),
TosError::TosServerError { request_id, ec, code, .. } => println!("Server error: request_id: {}, ec: {}, code: {}", request_id, ec, code),
_ => println!("Unknown error: {:?}", err)
}
}
}
}
Copy object and set metadata
use async_trait::async_trait;
use futures_core::future::BoxFuture;
use std::env;
use std::future::Future;
use std::time::Duration;
use tokio::runtime::Handle;
use ve_tos_rust_sdk::common::init_tracing_log;
use ve_tos_rust_sdk::asynchronous::bucket::BucketAPI;
use ve_tos_rust_sdk::asynchronous::object::ObjectAPI;
use ve_tos_rust_sdk::asynchronous::tos;
use ve_tos_rust_sdk::asynchronous::tos::AsyncRuntime;
use ve_tos_rust_sdk::object::{CopyObjectInput, PutObjectFromBufferInput};
use ve_tos_rust_sdk::enumeration::MetadataDirectiveType;
use std::collections::HashMap;
use ve_tos_rust_sdk::error::TosError;
#[derive(Debug, Default)]
pub struct TokioRuntime {}
#[async_trait]
impl AsyncRuntime for TokioRuntime {
type JoinError = tokio::task::JoinError;
async fn sleep(&self, duration: Duration) {
tokio::time::sleep(duration).await;
}
fn spawn<'a, F>(&self, future: F) -> BoxFuture<'a, Result<F::Output, Self::JoinError>>
where
F: Future + Send + 'static,
F::Output: Send + 'static,
{
Box::pin(Handle::current().spawn(future))
}
fn block_on<F: Future>(&self, future: F) -> F::Output {
Handle::current().block_on(future)
}
}
#[tokio::main]
async fn main() {
let _guard = init_tracing_log("info", "temp/logs", "app.log");
let ak = env::var("TOS_ACCESS_KEY").unwrap_or("".to_string());
let sk = env::var("TOS_SECRET_KEY").unwrap_or("".to_string());
let endpoint = "https://tos-cn-beijing.volces.com";
let region = "cn-beijing";
let client = tos::builder::<TokioRuntime>()
.connection_timeout(3000)
.request_timeout(10000)
.max_retry_count(3)
.ak(ak)
.sk(sk)
.region(region)
.endpoint(endpoint)
.build().unwrap();
// Upload source object
let source_key = "source-object.txt";
// Copy with metadata
let mut copy_input = CopyObjectInput::new("example-bucket", "copied-with-metadata.txt", "example-bucket", source_key);
let mut meta = HashMap::new();
meta.insert("author".to_string(), "TOS Team".to_string());
meta.insert("category".to_string(), "document".to_string());
copy_input.set_meta(meta);
copy_input.set_metadata_directive(MetadataDirectiveType::MetadataDirectiveReplace);
let output = client.copy_object(©_input).await;
match output {
Ok(res) => {
println!("Copy with metadata succeeded");
println!("etag: {}", res.etag());
if let Some(lm) = res.last_modified() { println!("last_modified: {}", lm); }
println!("copy_source_version_id: {}", res.copy_source_version_id());
println!("version_id: {}", res.version_id());
}
Err(err) => {
match err {
TosError::TosClientError { message, .. } => println!("Client error: {}", message),
TosError::TosServerError { request_id, ec, code, .. } => println!("Server error: request_id: {}, ec: {}, code: {}", request_id, ec, code),
_ => println!("Unknown error: {:?}", err)
}
}
}
}
Copy object across buckets
use async_trait::async_trait;
use futures_core::future::BoxFuture;
use std::env;
use std::future::Future;
use std::time::Duration;
use tokio::runtime::Handle;
use ve_tos_rust_sdk::common::init_tracing_log;
use ve_tos_rust_sdk::asynchronous::bucket::BucketAPI;
use ve_tos_rust_sdk::asynchronous::object::ObjectAPI;
use ve_tos_rust_sdk::asynchronous::tos;
use ve_tos_rust_sdk::asynchronous::tos::AsyncRuntime;
use ve_tos_rust_sdk::object::{CopyObjectInput};
use ve_tos_rust_sdk::bucket::CreateBucketInput;
use ve_tos_rust_sdk::error::TosError;
#[derive(Debug, Default)]
pub struct TokioRuntime {}
#[async_trait]
impl AsyncRuntime for TokioRuntime {
type JoinError = tokio::task::JoinError;
async fn sleep(&self, duration: Duration) {
tokio::time::sleep(duration).await;
}
fn spawn<'a, F>(&self, future: F) -> BoxFuture<'a, Result<F::Output, Self::JoinError>>
where
F: Future + Send + 'static,
F::Output: Send + 'static,
{
Box::pin(Handle::current().spawn(future))
}
fn block_on<F: Future>(&self, future: F) -> F::Output {
Handle::current().block_on(future)
}
}
#[tokio::main]
async fn main() {
let _guard = init_tracing_log("info", "temp/logs", "app.log");
let ak = env::var("TOS_ACCESS_KEY").unwrap_or("".to_string());
let sk = env::var("TOS_SECRET_KEY").unwrap_or("".to_string());
let endpoint = "https://tos-cn-beijing.volces.com";
let region = "cn-beijing";
let client = tos::builder::<TokioRuntime>()
.connection_timeout(3000)
.request_timeout(10000)
.max_retry_count(3)
.ak(ak)
.sk(sk)
.region(region)
.endpoint(endpoint)
.build().unwrap();
// Upload source object
let source_key = "source-object.txt";
// Cross bucket copy
let copy_input = CopyObjectInput::new("target-bucket", "copied-object.txt", "example-bucket", source_key);
let output = client.copy_object(©_input).await;
match output {
Ok(res) => {
println!("Cross bucket copy succeeded");
println!("etag: {}", res.etag());
if let Some(lm) = res.last_modified() { println!("last_modified: {}", lm); }
println!("copy_source_version_id: {}", res.copy_source_version_id());
println!("version_id: {}", res.version_id());
}
Err(err) => {
match err {
TosError::TosClientError { message, .. } => println!("Client error: {}", message),
TosError::TosServerError { request_id, ec, code, .. } => println!("Server error: request_id: {}, ec: {}, code: {}", request_id, ec, code),
_ => println!("Unknown error: {:?}", err)
}
}
}
}
Related documentation
Last updated: 2026.01.06 18:07:29
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