From d0e79983482400ac8506dcc7eb52a3dedff0942c Mon Sep 17 00:00:00 2001
From: Tien Do Nam <dev.tien.donam@gmail.com>
Date: Tue, 4 Aug 2026 00:14:52 +0200
Subject: [PATCH] feat: add stress send test

---
 packages/core/Cargo.toml              |   4 +
 packages/core/examples/stress_send.rs | 125 ++++++++++++++++++++++++++
 2 files changed, 129 insertions(+)
 create mode 100644 packages/core/examples/stress_send.rs

diff --git a/packages/core/Cargo.toml b/packages/core/Cargo.toml
index c9898ec3..3affce83 100644
--- a/packages/core/Cargo.toml
+++ b/packages/core/Cargo.toml
@@ -41,6 +41,10 @@ uuid = { version = "1.24.0", features = ["serde", "v4"] }
 webrtc = { version = "0.14.0", optional = true }
 x509-parser = { version = "0.18.1", features = ["verify"], optional = true }
 
+[[example]]
+name = "stress_send"
+required-features = ["http"]
+
 [features]
 default = []
 crypto = ["ed25519-dalek", "rcgen", "rsa", "sha2", "tokio-util"]
diff --git a/packages/core/examples/stress_send.rs b/packages/core/examples/stress_send.rs
new file mode 100644
index 00000000..15d04fb5
--- /dev/null
+++ b/packages/core/examples/stress_send.rs
@@ -0,0 +1,125 @@
+//! Stress test for the receiving side: sends many files over plain HTTP.
+//!
+//! The receiver must have encryption disabled so that plain HTTP is accepted.
+//!
+//! Usage:
+//!   cargo run --release --example stress_send --features full -- [host] [port] [pin]
+
+use localsend::http::client::LsHttpClientV2;
+use localsend::http::dto_v2::PrepareUploadRequestDtoV2;
+use localsend::http::dto_v2::RegisterDtoV2;
+use localsend::model::discovery::{DeviceType, ProtocolType, PROTOCOL_VERSION_V2};
+use localsend::model::transfer::FileDto;
+use rand::{Rng, RngExt};
+use std::collections::HashMap;
+use tokio_util::sync::CancellationToken;
+
+const FILE_COUNT: usize = 1000;
+const FILE_SIZE: usize = 1024 * 1024;
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    let mut args = std::env::args().skip(1);
+    let host = args.next().unwrap_or_else(|| "127.0.0.1".to_string());
+    let port: u16 = args.next().map(|arg| arg.parse()).transpose()?.unwrap_or(53317);
+    let pin = args.next();
+
+    let mut rng = rand::rng();
+
+    // Random fingerprint in the SHA-256 uppercase hex format.
+    // A fresh one per run, so the receiver treats every run as a new device.
+    let fingerprint: String = (0..32).map(|_| format!("{:02X}", rng.random::<u8>())).collect();
+
+    let files: HashMap<String, FileDto> = (0..FILE_COUNT)
+        .map(|i| {
+            let id = format!("file-{i}");
+            let file = FileDto {
+                id: id.clone(),
+                file_name: format!("stress/dir{:02}/sub{}/file{i:04}.bin", i % 20, i % 3),
+                size: FILE_SIZE as u64,
+                file_type: "application/octet-stream".to_string(),
+                sha256: None,
+                preview: None,
+                metadata: None,
+            };
+            (id, file)
+        })
+        .collect();
+
+    let payload = PrepareUploadRequestDtoV2 {
+        info: RegisterDtoV2 {
+            alias: "Stress Sender".to_string(),
+            version: PROTOCOL_VERSION_V2.to_string(),
+            device_model: Some("Stress".to_string()),
+            device_type: Some(DeviceType::Headless),
+            fingerprint,
+            port,
+            protocol: ProtocolType::Http,
+            download: false,
+        },
+        files,
+    };
+
+    let client = LsHttpClientV2::try_new_without_cert()?;
+
+    println!(
+        "Preparing upload of {FILE_COUNT} files ({} MiB total) to {host}:{port}...",
+        FILE_COUNT * FILE_SIZE / (1024 * 1024)
+    );
+    let prepared = client
+        .prepare_upload(
+            ProtocolType::Http,
+            &host,
+            port,
+            None,
+            payload,
+            pin.as_deref(),
+            CancellationToken::new(),
+        )
+        .await?;
+
+    let Some(response) = prepared.response else {
+        println!("Receiver accepted no files (status {})", prepared.status_code);
+        return Ok(());
+    };
+    println!(
+        "Session {}: {} of {FILE_COUNT} files accepted",
+        response.session_id,
+        response.files.len()
+    );
+
+    let started = std::time::Instant::now();
+    let mut sent = 0_usize;
+    for i in 0..FILE_COUNT {
+        let id = format!("file-{i}");
+        let Some(token) = response.files.get(&id) else {
+            continue;
+        };
+
+        let mut bytes = vec![0_u8; FILE_SIZE];
+        rng.fill_bytes(&mut bytes);
+
+        client
+            .upload(
+                ProtocolType::Http,
+                &host,
+                port,
+                None,
+                &response.session_id,
+                &id,
+                token,
+                localsend::reqwest::Body::from(bytes),
+                CancellationToken::new(),
+            )
+            .await
+            .map_err(|err| anyhow::anyhow!("Upload of {id} failed: {err}"))?;
+
+        sent += 1;
+        if sent.is_multiple_of(100) {
+            println!("{sent} files sent...");
+        }
+    }
+
+    println!("Done: {sent} files in {:.1?}", started.elapsed());
+    Ok(())
+}