imap: modify connection timeouts

melib/src/backends/imap.rs

@@ -174,7 +174,7 @@ pub(self) fn try_lock<T>(
     dur: Option<std::time::Duration>,
 ) -> Result<std::sync::MutexGuard<T>> {
     let now = Instant::now();
-    while Instant::now().duration_since(now) <= dur.unwrap_or(std::time::Duration::from_millis(150))
+    while Instant::now().duration_since(now) <= dur.unwrap_or(std::time::Duration::from_millis(100))
     {
         if let Ok(guard) = connection.try_lock() {
             return Ok(guard);
@@ -188,19 +188,23 @@ impl MailBackend for ImapType {
         //if let Ok(mut g) = try_lock(&self.connection, None) {
         //    let _ = g.connect();
         //}
-        try_lock(&self.uid_store.is_online, None)?.1.clone()
+        try_lock(
+            &self.uid_store.is_online,
+            Some(std::time::Duration::from_millis(12)),
+        )?
+        .1
+        .clone()
     }
 
     fn connect(&mut self) {
-        if self.is_online().is_err() {
+        let connection = self.connection.clone();
-            if Instant::now().duration_since(self.uid_store.is_online.lock().unwrap().0)
+        let _ = std::thread::Builder::new()
-                >= std::time::Duration::new(2, 0)
+            .name(format!("{} connecting", self.account_name.as_str(),))
-            {
+            .spawn(move || {
-                if let Ok(mut g) = try_lock(&self.connection, None) {
+                if let Ok(mut g) = try_lock(&connection, None) {
                     let _ = g.connect();
                 }
-            }
+            });
-        }
     }
 
     fn get(&mut self, mailbox: &Mailbox) -> Async<Result<Vec<Envelope>>> {

melib/src/backends/imap/connection.rs

@@ -639,6 +639,7 @@ impl Iterator for ImapBlockingConnection {
     fn next(&mut self) -> Option<Self::Item> {
         self.result.drain(0..self.prev_res_length);
         self.prev_res_length = 0;
+        let mut prev_failure = None;
         let ImapBlockingConnection {
             ref mut prev_res_length,
             ref mut result,
@@ -660,12 +661,23 @@ impl Iterator for ImapBlockingConnection {
                         *prev_res_length = pos + b"\r\n".len();
                         return Some(result[0..*prev_res_length].to_vec());
                     }
+                    prev_failure = None;
                 }
                 Err(e)
                     if e.kind() == std::io::ErrorKind::WouldBlock
                         || e.kind() == std::io::ErrorKind::Interrupted =>
                 {
                     debug!(&e);
+                    if let Some(prev_failure) = prev_failure.as_ref() {
+                        if Instant::now().duration_since(*prev_failure)
+                            >= std::time::Duration::new(60 * 5, 0)
+                        {
+                            *err = Some(e.to_string());
+                            return None;
+                        }
+                    } else {
+                        prev_failure = Some(Instant::now());
+                    }
                     continue;
                 }
                 Err(e) => {