specify I/O timeout

We need to be a bit conservative here due to buffer bloat - in the
upload case on a slow link, it can appear that no I/O is happening
when a buffer is draining.

rslib/src/media/sync.rs

@@ -8,7 +8,7 @@ use crate::media::files::{
     add_file_from_ankiweb, data_for_file, mtime_as_i64, normalize_filename, AddedFile,
 };
 use crate::media::MediaManager;
-use crate::version;
+use crate::{sync::Timeouts, version};
 use bytes::Bytes;
 use reqwest::{multipart, Client, Response};
 use serde_derive::{Deserialize, Serialize};
@@ -155,9 +155,11 @@ where
         host_number: u32,
         log: Logger,
     ) -> MediaSyncer<'_, P> {
+        let timeouts = Timeouts::new();
         let client = Client::builder()
-            .connect_timeout(Duration::from_secs(30))
-            .timeout(Duration::from_secs(60))
+            .connect_timeout(Duration::from_secs(timeouts.connect_secs))
+            .timeout(Duration::from_secs(timeouts.request_secs))
+            .io_timeout(Duration::from_secs(timeouts.io_secs))
             .build()
             .unwrap();
         let endpoint = media_sync_endpoint(host_number);

rslib/src/sync/http_client.rs

@@ -72,14 +72,33 @@ struct SanityCheckIn {
     full: bool,
 }
 
+pub struct Timeouts {
+    pub connect_secs: u64,
+    pub request_secs: u64,
+    pub io_secs: u64,
+}
+
+impl Timeouts {
+    pub fn new() -> Self {
+        Timeouts {
+            connect_secs: 30,
+            /// This is smaller than the I/O limit because it is just a
+            /// default - some longer-running requests override it.
+            request_secs: 60,
+            io_secs: 300,
+        }
+    }
+}
 #[derive(Serialize)]
 struct Empty {}
 
 impl HTTPSyncClient {
     pub fn new(hkey: Option<String>, host_number: u32) -> HTTPSyncClient {
+        let timeouts = Timeouts::new();
         let client = Client::builder()
-            .connect_timeout(Duration::from_secs(30))
-            .timeout(Duration::from_secs(60))
+            .connect_timeout(Duration::from_secs(timeouts.connect_secs))
+            .timeout(Duration::from_secs(timeouts.request_secs))
+            .io_timeout(Duration::from_secs(timeouts.io_secs))
             .build()
             .unwrap();
         let skey = guid();

rslib/src/sync/mod.rs

@@ -21,6 +21,7 @@ use flate2::write::GzEncoder;
 use flate2::Compression;
 use futures::StreamExt;
 use http_client::HTTPSyncClient;
+pub use http_client::Timeouts;
 use itertools::Itertools;
 use reqwest::{multipart, Client, Response};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};