add --throttle-upload option

crates/ptth_server/src/bin/ptth_server.rs

@@ -20,7 +20,7 @@ struct Opt {
 	auto_gen_key: bool,
 	
 	#[structopt (long)]
-	simulate_slow_upload: bool,
+	throttle_upload: bool,
 	
 	#[structopt (long)]
 	file_server_root: Option <PathBuf>,
@@ -90,7 +90,7 @@ async fn main () -> Result <(), anyhow::Error> {
 		api_key: config_file.api_key,
 		relay_url: opt.relay_url.or (config_file.relay_url).expect ("`relay_url` must be provided in command line or config file"),
 		file_server_root: opt.file_server_root.or (config_file.file_server_root),
-		simulate_slow_upload: opt.simulate_slow_upload,
+		throttle_upload: opt.throttle_upload,
 	};
 	
 	if opt.print_tripcode {

crates/ptth_server/src/lib.rs

@@ -17,6 +17,7 @@ use futures::FutureExt;
 use reqwest::Client;
 use tokio::{
 	sync::{
+		mpsc,
 		oneshot,
 	},
 };
@@ -86,9 +87,33 @@ async fn handle_one_req (
 	if let Some (length) = response.content_length {
 		resp_req = resp_req.header ("Content-Length", length.to_string ());
 	}
-	if let Some (body) = response.body {
+	if let Some (mut body) = response.body {
+		if state.config.throttle_upload {
+			// Spawn another task to throttle the chunks
+			
+			let (tx, rx) = mpsc::channel (1);
+			
+			tokio::spawn (async move {
+				while let Some (chunk) = body.recv ().await {
+					let len = chunk.as_ref ().map (|x| x.len ()).ok ();
+					tx.send (chunk).await?;
+					
+					if let Some (len) = len {
+						// debug! ("Throttling {} byte chunk", len);
+					}
+					
+					tokio::time::sleep (Duration::from_millis (1000)).await;
+				}
+				
+				Ok::<_, anyhow::Error> (())
+			});
+			
+			resp_req = resp_req.body (reqwest::Body::wrap_stream (ReceiverStream::new (rx)));
+		}
+		else {
 			resp_req = resp_req.body (reqwest::Body::wrap_stream (ReceiverStream::new (body)));
 		}
+	}
 	
 	let req = resp_req.build ().map_err (ServerError::Step5Responding)?;
 	
@@ -155,7 +180,7 @@ pub struct ConfigFile {
 	pub api_key: String,
 	pub relay_url: String,
 	pub file_server_root: Option <PathBuf>,
-	pub simulate_slow_upload: bool,
+	pub throttle_upload: bool,
 }
 
 impl ConfigFile {
@@ -166,7 +191,7 @@ impl ConfigFile {
 			api_key,
 			relay_url,
 			file_server_root: None,
-			simulate_slow_upload: false,
+			throttle_upload: false,
 		}
 	}
 	
@@ -179,6 +204,7 @@ impl ConfigFile {
 #[derive (Default)]
 pub struct Config {
 	pub relay_url: String,
+	pub throttle_upload: bool,
 }
 
 pub async fn run_server (
@@ -233,6 +259,7 @@ pub async fn run_server (
 		},
 		config: Config {
 			relay_url: config_file.relay_url,
+			throttle_upload: config_file.throttle_upload,
 		},
 		client,
 	});