5 files changed, 29 insertions, 5 deletions
diff --git a/app/javascript/mastodon/actions/accounts.js b/app/javascript/mastodon/actions/accounts.js
index d4a824e2c..cb2c682a4 100644
--- a/app/javascript/mastodon/actions/accounts.js
+++ b/app/javascript/mastodon/actions/accounts.js
@@ -106,7 +106,7 @@ export function fetchAccount(id) {
       dispatch,
       getState,
       db.transaction('accounts', 'read').objectStore('accounts').index('id'),
-      id
+      id,
     ).then(() => db.close(), error => {
       db.close();
       throw error;
@@ -396,6 +396,7 @@ export function fetchFollowersFail(id, error) {
     type: FOLLOWERS_FETCH_FAIL,
     id,
     error,
+    skipNotFound: true,
   };
 };
 
@@ -482,6 +483,7 @@ export function fetchFollowingFail(id, error) {
     type: FOLLOWING_FETCH_FAIL,
     id,
     error,
+    skipNotFound: true,
   };
 };
 
@@ -571,6 +573,7 @@ export function fetchRelationshipsFail(error) {
     type: RELATIONSHIPS_FETCH_FAIL,
     error,
     skipLoading: true,
+    skipNotFound: true,
   };
 };
 
diff --git a/app/javascript/mastodon/actions/alerts.js b/app/javascript/mastodon/actions/alerts.js
index cd36d8007..1670f9c10 100644
--- a/app/javascript/mastodon/actions/alerts.js
+++ b/app/javascript/mastodon/actions/alerts.js
@@ -34,11 +34,11 @@ export function showAlert(title = messages.unexpectedTitle, message = messages.u
   };
 };
 
-export function showAlertForError(error) {
+export function showAlertForError(error, skipNotFound = false) {
   if (error.response) {
     const { data, status, statusText, headers } = error.response;
 
-    if (status === 404 || status === 410) {
+    if (skipNotFound && (status === 404 || status === 410)) {
       // Skip these errors as they are reflected in the UI
       return { type: ALERT_NOOP };
     }
diff --git a/app/javascript/mastodon/actions/compose.js b/app/javascript/mastodon/actions/compose.js
index c3c6ff1a1..6b73fc90e 100644
--- a/app/javascript/mastodon/actions/compose.js
+++ b/app/javascript/mastodon/actions/compose.js
@@ -230,12 +230,31 @@ export function uploadCompose(files) {
         // Account for disparity in size of original image and resized data
         total += file.size - f.size;
 
-        return api(getState).post('/api/v1/media', data, {
+        return api(getState).post('/api/v2/media', data, {
           onUploadProgress: function({ loaded }){
             progress[i] = loaded;
             dispatch(uploadComposeProgress(progress.reduce((a, v) => a + v, 0), total));
           },
-        }).then(({ data }) => dispatch(uploadComposeSuccess(data, f)));
+        }).then(({ status, data }) => {
+          // If server-side processing of the media attachment has not completed yet,
+          // poll the server until it is, before showing the media attachment as uploaded
+
+          if (status === 200) {
+            dispatch(uploadComposeSuccess(data, f));
+          } else if (status === 202) {
+            const poll = () => {
+              api(getState).get(`/api/v1/media/${data.id}`).then(response => {
+                if (response.status === 200) {
+                  dispatch(uploadComposeSuccess(response.data, f));
+                } else if (response.status === 206) {
+                  setTimeout(() => poll(), 1000);
+                }
+              }).catch(error => dispatch(uploadComposeFail(error)));
+            };
+
+            poll();
+          }
+        });
       }).catch(error => dispatch(uploadComposeFail(error)));
     };
   };
diff --git a/app/javascript/mastodon/actions/identity_proofs.js b/app/javascript/mastodon/actions/identity_proofs.js
index 449debf61..103983956 100644
--- a/app/javascript/mastodon/actions/identity_proofs.js
+++ b/app/javascript/mastodon/actions/identity_proofs.js
@@ -27,4 +27,5 @@ export const fetchAccountIdentityProofsFail = (accountId, err) => ({
   type: IDENTITY_PROOFS_ACCOUNT_FETCH_FAIL,
   accountId,
   err,
+  skipNotFound: true,
 });
diff --git a/app/javascript/mastodon/actions/timelines.js b/app/javascript/mastodon/actions/timelines.js
index 054668655..cdd2111f8 100644
--- a/app/javascript/mastodon/actions/timelines.js
+++ b/app/javascript/mastodon/actions/timelines.js
@@ -149,6 +149,7 @@ export function expandTimelineFail(timeline, error, isLoadingMore) {
     timeline,
     error,
     skipLoading: !isLoadingMore,
+    skipNotFound: timeline.startsWith('account:'),
   };
 };