From d3cae9fd20b4e4363c3ab6dc9b4ab24795e62d3a Mon Sep 17 00:00:00 2001
From: "benato.denis96@gmail.com" <benato.denis96@gmail.com>
Date: Thu, 12 Mar 2026 08:45:23 +0100
Subject: [PATCH] Feat: initial features implementation

---
 .gitignore  |    1 +
 Cargo.lock  | 1967 +++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |    8 +
 README.md   |  208 ++++++
 src/main.rs |  429 +++++++++++
 5 files changed, 2613 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 README.md
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
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index 0000000..ea8c4bf
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diff --git a/Cargo.lock b/Cargo.lock
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+name = "wit-bindgen"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
+dependencies = [
+ "wit-bindgen-rust-macro",
+]
+
+[[package]]
+name = "wit-bindgen-core"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea61de684c3ea68cb082b7a88508a8b27fcc8b797d738bfc99a82facf1d752dc"
+dependencies = [
+ "anyhow",
+ "heck",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-bindgen-rust"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7c566e0f4b284dd6561c786d9cb0142da491f46a9fbed79ea69cdad5db17f21"
+dependencies = [
+ "anyhow",
+ "heck",
+ "indexmap",
+ "prettyplease",
+ "syn",
+ "wasm-metadata",
+ "wit-bindgen-core",
+ "wit-component",
+]
+
+[[package]]
+name = "wit-bindgen-rust-macro"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c0f9bfd77e6a48eccf51359e3ae77140a7f50b1e2ebfe62422d8afdaffab17a"
+dependencies = [
+ "anyhow",
+ "prettyplease",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wit-bindgen-core",
+ "wit-bindgen-rust",
+]
+
+[[package]]
+name = "wit-component"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
+dependencies = [
+ "anyhow",
+ "bitflags",
+ "indexmap",
+ "log",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "wasm-encoder",
+ "wasm-metadata",
+ "wasmparser",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-parser"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecc8ac4bc1dc3381b7f59c34f00b67e18f910c2c0f50015669dde7def656a736"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "indexmap",
+ "log",
+ "semver",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "unicode-xid",
+ "wasmparser",
+]
+
+[[package]]
+name = "writeable"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"
+
+[[package]]
+name = "yoke"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72d6e5c6afb84d73944e5cedb052c4680d5657337201555f9f2a16b7406d4954"
+dependencies = [
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b659052874eb698efe5b9e8cf382204678a0086ebf46982b79d6ca3182927e5d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b97154e67e32c85465826e8bcc1c59429aaaf107c1e4a9e53c8d8ccd5eff88d0"
+
+[[package]]
+name = "zerotrie"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a59c17a5562d507e4b54960e8569ebee33bee890c70aa3fe7b97e85a9fd7851"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c28719294829477f525be0186d13efa9a3c602f7ec202ca9e353d310fb9a002"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eadce39539ca5cb3985590102671f2567e659fca9666581ad3411d59207951f3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+
+[[package]]
+name = "zstd"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91ee311a569c327171651566e07972200e76fcfe2242a4fa446149a3881c08a"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "7.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f49c4d5f0abb602a93fb8736af2a4f4dd9512e36f7f570d66e65ff867ed3b9d"
+dependencies = [
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.16+zstd.1.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91e19ebc2adc8f83e43039e79776e3fda8ca919132d68a1fed6a5faca2683748"
+dependencies = [
+ "cc",
+ "pkg-config",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..d180ed1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "swfss3"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+argh = "0.1.13"
+s3 = { version = "0.1.22", features = ["blocking", "rustls"] }
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d0c55df
--- /dev/null
+++ b/README.md
@@ -0,0 +1,208 @@
+# swfss3
+
+`swfss3` is a small CLI for performing **filesystem-like operations** (list/read/write/delete)
+against a **SeaweedFS S3-compatible** API endpoint using the Rust `s3` crate.
+
+## Build
+
+```bash
+cargo build --release
+```
+
+Binary will be at `target/release/swfss3`.
+
+## Authentication and configuration
+
+You must provide:
+
+- **Endpoint**: `--endpoint` (custom domain / S3 API URL)
+- **Bucket**: `--bucket`
+- **Region**: `--region` (defaults to `us-east-1`)
+
+Authentication (choose one):
+
+- **Flags**: `--access-key-id` and `--secret-access-key` (optional `--session-token`)
+- **Environment variables**: `AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`, `AWS_SESSION_TOKEN`
+- **Anonymous**: `--anonymous` (unsigned requests)
+
+If you see `invalid config: missing AWS_ACCESS_KEY_ID`, it means you did not pass credentials
+flags and `swfss3` could not find the AWS environment variables. Fix it by using **one** of:
+
+- **Provide keys via flags**:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  --access-key-id YOUR_KEY --secret-access-key YOUR_SECRET \
+  list --prefix some/path/
+```
+
+- **Export keys via environment variables**:
+
+```bash
+export AWS_ACCESS_KEY_ID=YOUR_KEY
+export AWS_SECRET_ACCESS_KEY=YOUR_SECRET
+# optional (temporary credentials)
+export AWS_SESSION_TOKEN=YOUR_TOKEN
+```
+
+- **Use unsigned requests** (only works if the bucket/object is publicly readable/writable):
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style --anonymous \
+  list --prefix some/path/
+```
+
+Addressing style (optional, but often important for S3-compatible servers):
+
+- `--path-style` (recommended for many self-hosted endpoints)
+- `--virtual-hosted` (bucket as a subdomain)
+- default is automatic selection
+
+## Commands
+
+All commands share the common flags above and then take their own arguments.
+
+### List objects
+
+List a prefix (like listing a directory):
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  list --prefix some/path/
+```
+
+Recursive listing (no delimiter grouping):
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  list --prefix some/path/ --recursive
+```
+
+Fetch all pages:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  list --prefix some/path/ --all
+```
+
+### Read an object
+
+To stdout:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  read some/path/file.txt
+```
+
+To a local file:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  read some/path/file.txt --out ./file.txt
+```
+
+### Write an object
+
+Upload a local file to an object key:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  write ./local.bin some/path/local.bin
+```
+
+Optionally set `Content-Type`:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  write ./index.html some/path/index.html --content-type text/html
+```
+
+### Delete an object
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  delete some/path/local.bin
+```
+
+### Stat (HEAD) an object
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  stat some/path/file.txt
+```
+
+### Copy / move (rename) an object
+
+Server-side copy:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  cp some/path/file.txt some/path/file-copy.txt
+```
+
+Move (copy then delete):
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  mv some/path/file.txt some/path/renamed.txt
+```
+
+### Presigned URLs
+
+Create a temporary download URL (default 900s expiry):
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  presign-get some/path/file.txt --expires 300
+```
+
+Create a temporary upload URL:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  presign-put some/path/upload.bin --expires 300
+```
+
+### Delete everything under a prefix
+
+Dry-run (prints keys that would be deleted):
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  rm-prefix some/path/
+```
+
+Actually delete:
+
+```bash
+swfss3 --endpoint http://localhost:8333 --bucket mybucket --path-style \
+  rm-prefix some/path/ --yes
+```
+
+## Troubleshooting
+
+### `NoSuchBucket` but the bucket “exists”
+
+If you get an error like `code=NoSuchBucket`, double-check:
+
+- **You are hitting the S3 gateway endpoint**, not the filer UI or another reverse-proxied service.
+- **The bucket exists in the same endpoint/cluster**. Buckets are endpoint-scoped.
+- **Addressing style**: if one style doesn’t work, try the other:
+  - `--path-style` (common for self-hosted)
+  - `--virtual-hosted` (requires bucket DNS/wildcard)
+
+## Help
+
+```bash
+swfss3 --help
+swfss3 list --help
+swfss3 read --help
+swfss3 write --help
+swfss3 delete --help
+swfss3 stat --help
+swfss3 cp --help
+swfss3 mv --help
+swfss3 presign-get --help
+swfss3 presign-put --help
+swfss3 rm-prefix --help
+```
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..66835d7
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,429 @@
+use std::{
+    fs::File,
+    io::{self, BufWriter, Write},
+    path::PathBuf,
+    time::Duration,
+};
+
+use argh::FromArgs;
+use s3::{AddressingStyle, Auth, BlockingClient, Credentials};
+
+#[derive(FromArgs, Debug)]
+/// Manage files in a SeaweedFS S3-compatible bucket.
+struct Cli {
+    /// S3 endpoint URL, e.g. https://s3.example.com or http://localhost:8333
+    #[argh(option)]
+    endpoint: String,
+
+    /// signing region (SeaweedFS usually accepts "us-east-1")
+    #[argh(option, default = "String::from(\"us-east-1\")")]
+    region: String,
+
+    /// bucket name
+    #[argh(option)]
+    bucket: String,
+
+    /// AWS access key id (falls back to AWS_ACCESS_KEY_ID)
+    #[argh(option)]
+    access_key_id: Option<String>,
+
+    /// AWS secret access key (falls back to AWS_SECRET_ACCESS_KEY)
+    #[argh(option)]
+    secret_access_key: Option<String>,
+
+    /// AWS session token (falls back to AWS_SESSION_TOKEN)
+    #[argh(option)]
+    session_token: Option<String>,
+
+    /// do not sign requests
+    #[argh(switch)]
+    anonymous: bool,
+
+    /// always use path-style URLs (recommended for many S3-compatible servers)
+    #[argh(switch)]
+    path_style: bool,
+
+    /// always use virtual-hosted-style URLs (bucket as subdomain)
+    #[argh(switch)]
+    virtual_hosted: bool,
+
+    #[argh(subcommand)]
+    cmd: Command,
+}
+
+#[derive(FromArgs, Debug)]
+#[argh(subcommand)]
+enum Command {
+    List(CmdList),
+    Read(CmdRead),
+    Write(CmdWrite),
+    Delete(CmdDelete),
+    Stat(CmdStat),
+    Cp(CmdCp),
+    Mv(CmdMv),
+    PresignGet(CmdPresignGet),
+    PresignPut(CmdPresignPut),
+    RmPrefix(CmdRmPrefix),
+}
+
+#[derive(FromArgs, Debug)]
+/// List objects under a prefix.
+#[argh(subcommand, name = "list")]
+struct CmdList {
+    /// key prefix to list (like a directory path)
+    #[argh(option, default = "String::new()")]
+    prefix: String,
+
+    /// list recursively (do not group by "/")
+    #[argh(switch)]
+    recursive: bool,
+
+    /// fetch and print all pages
+    #[argh(switch)]
+    all: bool,
+
+    /// maximum number of keys per page
+    #[argh(option)]
+    max_keys: Option<u32>,
+}
+
+#[derive(FromArgs, Debug)]
+/// Read an object to a file (or stdout).
+#[argh(subcommand, name = "read")]
+struct CmdRead {
+    /// object key
+    #[argh(positional)]
+    key: String,
+
+    /// output file path (omit to write to stdout)
+    #[argh(option)]
+    out: Option<PathBuf>,
+}
+
+#[derive(FromArgs, Debug)]
+/// Write a local file to an object key.
+#[argh(subcommand, name = "write")]
+struct CmdWrite {
+    /// local file path to upload
+    #[argh(positional)]
+    file: PathBuf,
+
+    /// destination object key
+    #[argh(positional)]
+    key: String,
+
+    /// optional content-type, e.g. text/plain
+    #[argh(option)]
+    content_type: Option<String>,
+}
+
+#[derive(FromArgs, Debug)]
+/// Delete an object.
+#[argh(subcommand, name = "delete")]
+struct CmdDelete {
+    /// object key
+    #[argh(positional)]
+    key: String,
+}
+
+#[derive(FromArgs, Debug)]
+/// Show object metadata (HEAD).
+#[argh(subcommand, name = "stat")]
+struct CmdStat {
+    /// object key
+    #[argh(positional)]
+    key: String,
+}
+
+#[derive(FromArgs, Debug)]
+/// Copy an object to a new key (server-side copy).
+#[argh(subcommand, name = "cp")]
+struct CmdCp {
+    /// source key
+    #[argh(positional)]
+    src_key: String,
+    /// destination key
+    #[argh(positional)]
+    dst_key: String,
+}
+
+#[derive(FromArgs, Debug)]
+/// Move/rename an object key (copy then delete).
+#[argh(subcommand, name = "mv")]
+struct CmdMv {
+    /// source key
+    #[argh(positional)]
+    src_key: String,
+    /// destination key
+    #[argh(positional)]
+    dst_key: String,
+}
+
+#[derive(FromArgs, Debug)]
+/// Create a presigned download URL.
+#[argh(subcommand, name = "presign-get")]
+struct CmdPresignGet {
+    /// object key
+    #[argh(positional)]
+    key: String,
+
+    /// expiry in seconds
+    #[argh(option, default = "900")]
+    expires: u64,
+}
+
+#[derive(FromArgs, Debug)]
+/// Create a presigned upload URL.
+#[argh(subcommand, name = "presign-put")]
+struct CmdPresignPut {
+    /// object key
+    #[argh(positional)]
+    key: String,
+
+    /// expiry in seconds
+    #[argh(option, default = "900")]
+    expires: u64,
+}
+
+#[derive(FromArgs, Debug)]
+/// Delete all objects under a prefix (paged + batched deletes).
+#[argh(subcommand, name = "rm-prefix")]
+struct CmdRmPrefix {
+    /// key prefix to delete
+    #[argh(positional)]
+    prefix: String,
+
+    /// perform deletion (required); without this, prints keys that would be deleted
+    #[argh(switch)]
+    yes: bool,
+}
+
+fn main() {
+    let cli: Cli = argh::from_env();
+    if let Err(err) = run(cli) {
+        eprintln!("{err}");
+        std::process::exit(1);
+    }
+}
+
+fn run(cli: Cli) -> Result<(), s3::Error> {
+    if cli.path_style && cli.virtual_hosted {
+        return Err(s3::Error::invalid_config(
+            "choose only one of --path-style or --virtual-hosted",
+        ));
+    }
+
+    let addressing_style = if cli.path_style {
+        AddressingStyle::Path
+    } else if cli.virtual_hosted {
+        AddressingStyle::VirtualHosted
+    } else {
+        AddressingStyle::Auto
+    };
+
+    let auth = if cli.anonymous {
+        Auth::Anonymous
+    } else if let (Some(akid), Some(secret)) = (cli.access_key_id, cli.secret_access_key) {
+        let mut creds = Credentials::new(akid, secret)?;
+        if let Some(token) = cli.session_token {
+            creds = creds.with_session_token(token)?;
+        }
+        Auth::Static(creds)
+    } else {
+        Auth::from_env()?
+    };
+
+    let client = BlockingClient::builder(&cli.endpoint)?
+        .region(cli.region)
+        .auth(auth)
+        .addressing_style(addressing_style)
+        .build()?;
+
+    match cli.cmd {
+        Command::List(cmd) => cmd_list(&client, &cli.bucket, cmd),
+        Command::Read(cmd) => cmd_read(&client, &cli.bucket, cmd),
+        Command::Write(cmd) => cmd_write(&client, &cli.bucket, cmd),
+        Command::Delete(cmd) => cmd_delete(&client, &cli.bucket, cmd),
+        Command::Stat(cmd) => cmd_stat(&client, &cli.bucket, cmd),
+        Command::Cp(cmd) => cmd_cp(&client, &cli.bucket, cmd),
+        Command::Mv(cmd) => cmd_mv(&client, &cli.bucket, cmd),
+        Command::PresignGet(cmd) => cmd_presign_get(&client, &cli.bucket, cmd),
+        Command::PresignPut(cmd) => cmd_presign_put(&client, &cli.bucket, cmd),
+        Command::RmPrefix(cmd) => cmd_rm_prefix(&client, &cli.bucket, cmd),
+    }
+}
+
+fn cmd_list(client: &BlockingClient, bucket: &str, cmd: CmdList) -> Result<(), s3::Error> {
+    let mut req = client.objects().list_v2(bucket);
+    if !cmd.prefix.is_empty() {
+        req = req.prefix(cmd.prefix);
+    }
+    if !cmd.recursive {
+        req = req.delimiter("/");
+    }
+    if let Some(max_keys) = cmd.max_keys {
+        req = req.max_keys(max_keys);
+    }
+
+    let print_page = |page: s3::types::ListObjectsV2Output| {
+        for p in page.common_prefixes {
+            println!("{p}");
+        }
+        for o in page.contents {
+            println!("{}", o.key);
+        }
+    };
+
+    if cmd.all {
+        for page in req.pager() {
+            print_page(page?);
+        }
+    } else {
+        print_page(req.send()?);
+    }
+
+    Ok(())
+}
+
+fn cmd_read(client: &BlockingClient, bucket: &str, cmd: CmdRead) -> Result<(), s3::Error> {
+    let obj = client.objects().get(bucket, cmd.key).send()?;
+
+    match cmd.out {
+        Some(path) => {
+            let file = File::create(path)
+                .map_err(|e| s3::Error::transport("failed to create output file", Some(Box::new(e))))?;
+            let mut writer = BufWriter::new(file);
+            obj.write_to(&mut writer)?;
+            writer
+                .flush()
+                .map_err(|e| s3::Error::transport("failed to flush output file", Some(Box::new(e))))?;
+        }
+        None => {
+            let stdout = io::stdout();
+            let mut handle = stdout.lock();
+            obj.write_to(&mut handle)?;
+            handle
+                .flush()
+                .map_err(|e| s3::Error::transport("failed to flush stdout", Some(Box::new(e))))?;
+        }
+    }
+
+    Ok(())
+}
+
+fn cmd_write(client: &BlockingClient, bucket: &str, cmd: CmdWrite) -> Result<(), s3::Error> {
+    let file = File::open(&cmd.file)
+        .map_err(|e| s3::Error::transport("failed to open input file", Some(Box::new(e))))?;
+    let len = file
+        .metadata()
+        .map(|m| m.len())
+        .map_err(|e| s3::Error::transport("failed to stat input file", Some(Box::new(e))))?;
+
+    let mut req = client
+        .objects()
+        .put(bucket, cmd.key)
+        .body_reader_sized(file, len);
+
+    if let Some(ct) = cmd.content_type {
+        req = req.content_type(ct);
+    }
+
+    req.send()?;
+    Ok(())
+}
+
+fn cmd_delete(client: &BlockingClient, bucket: &str, cmd: CmdDelete) -> Result<(), s3::Error> {
+    client.objects().delete(bucket, cmd.key).send()?;
+    Ok(())
+}
+
+fn cmd_stat(client: &BlockingClient, bucket: &str, cmd: CmdStat) -> Result<(), s3::Error> {
+    let out = client.objects().head(bucket, cmd.key).send()?;
+    if let Some(len) = out.content_length {
+        println!("content_length={len}");
+    } else {
+        println!("content_length=<unknown>");
+    }
+    if let Some(ct) = out.content_type {
+        println!("content_type={ct}");
+    }
+    if let Some(etag) = out.etag {
+        println!("etag={etag}");
+    }
+    Ok(())
+}
+
+fn cmd_cp(client: &BlockingClient, bucket: &str, cmd: CmdCp) -> Result<(), s3::Error> {
+    client
+        .objects()
+        .copy(bucket, cmd.src_key, bucket, cmd.dst_key)
+        .send()?;
+    Ok(())
+}
+
+fn cmd_mv(client: &BlockingClient, bucket: &str, cmd: CmdMv) -> Result<(), s3::Error> {
+    client
+        .objects()
+        .copy(bucket, cmd.src_key.clone(), bucket, cmd.dst_key)
+        .send()?;
+    client.objects().delete(bucket, cmd.src_key).send()?;
+    Ok(())
+}
+
+fn cmd_presign_get(
+    client: &BlockingClient,
+    bucket: &str,
+    cmd: CmdPresignGet,
+) -> Result<(), s3::Error> {
+    let presigned = client
+        .objects()
+        .presign_get(bucket, cmd.key)
+        .expires_in(Duration::from_secs(cmd.expires))
+        .build()?;
+    println!("{}", presigned.url);
+    Ok(())
+}
+
+fn cmd_presign_put(
+    client: &BlockingClient,
+    bucket: &str,
+    cmd: CmdPresignPut,
+) -> Result<(), s3::Error> {
+    let presigned = client
+        .objects()
+        .presign_put(bucket, cmd.key)
+        .expires_in(Duration::from_secs(cmd.expires))
+        .build()?;
+    println!("{}", presigned.url);
+    Ok(())
+}
+
+fn cmd_rm_prefix(client: &BlockingClient, bucket: &str, cmd: CmdRmPrefix) -> Result<(), s3::Error> {
+    let mut keys: Vec<String> = Vec::new();
+
+    for page in client.objects().list_v2(bucket).prefix(cmd.prefix).pager() {
+        let page = page?;
+        for obj in page.contents {
+            keys.push(obj.key);
+        }
+    }
+
+    if !cmd.yes {
+        for k in &keys {
+            println!("{k}");
+        }
+        eprintln!("dry run: {} objects (re-run with --yes to delete)", keys.len());
+        return Ok(());
+    }
+
+    // S3 multi-delete limit is 1000 keys per request.
+    for chunk in keys.chunks(1000) {
+        client
+            .objects()
+            .delete_objects(bucket)
+            .objects(chunk.iter().cloned())
+            .send()?;
+    }
+
+    Ok(())
+}