Load remote file in extension

extension/Userscripts Extension/Functions.swift

@@ -1185,6 +1185,26 @@ func getCode(_ filenames: [String], _ isTop: Bool)-> [String: [String: [String:
     return allFiles
 }
 
+func getRemoteFile(_ url: String, _ callback: @escaping (String, Error?) -> Void) -> Bool {
+    guard let solidURL = URL(string: url) else {
+        return false
+    }
+    let request = URLRequest(url: solidURL, cachePolicy: .reloadIgnoringLocalCacheData)
+    URLSession.shared.dataTask(with: request) { data, _, error in
+        guard
+            let solidData = data,
+            let solidCode = String(data: solidData, encoding: .utf8)
+        else {
+            callback("", error)
+            return
+        }
+        callback(solidCode, nil)
+        return
+    }
+    .resume()
+    return true
+}
+
 // popover
 func updateBadgeCount(_ frames: [[String : Any]]) {
     guard

extension/Userscripts Extension/SafariExtensionHandler.swift

@@ -109,10 +109,29 @@ class SafariExtensionHandler: SFSafariExtensionHandler {
             } else {
                 responseError = "failed to get code"
             }
+        case "REQ_GET_REMOTE_FILE":
+            if
+                let data = userInfo,
+                let url = data["url"] as? String,
+                getRemoteFile(url, { code, error in
+                    page.dispatchMessageToScript(
+                        withName: "RESP_GET_REMOTE_FILE",
+                        userInfo: [ "data": [ "url": url, "code": code ], "error": error?.localizedDescription ?? "" ]
+                    )
+                })
+            {
+                // Started
+            } else {
+                responseName = "RESP_GET_REMOTE_FILE"
+                responseData = [ "url": userInfo?["url"] ]
+                responseError = "failed to download"
+            }
         default:
             err("message from js has no handler")
         }
-        page.dispatchMessageToScript(withName: responseName, userInfo: ["data": responseData, "error": responseError])
+        if !responseName.isEmpty {
+            page.dispatchMessageToScript(withName: responseName, userInfo: ["data": responseData, "error": responseError])
+        }
     }
 
     override func toolbarItemClicked(in window: SFSafariWindow) {

src/Components/Editor/Editor.svelte

@@ -294,7 +294,7 @@
                 {:else if $state.includes("trashing")}
                     （◞‸◟）
                 {:else if $state.includes("updating")}
-                    Updating code, <span class="link" on:click={abort}>cancel request</span>
+                    Updating code<!--, <span class="link" on:click={abort}>cancel request</span>-->
                 {:else if remote}
                     Code was <span class="info" title={remote}>remotely fetched</span>, check carefully before saving!
                 {:else if temp}

src/handler.js

@@ -112,6 +112,10 @@ function handleMessage(e) {
             // in the event of a failure from one of the above, log error if needed and nothing else
             break;
         }
+        case "RESP_GET_REMOTE_FILE": {
+            // SHould be handled by callback in getRemoteFile()
+            break;
+        }
         default: {
             console.error(`message from swift has no handler - ${name}`);
         }

src/utils.js

@@ -27,20 +27,28 @@ export function sortBy(array, order) {
     return array;
 }
 
-export async function getRemoteFile(url, signal) {
-    let r = {};
-    // add delay for testing
-    // url = `http://slowwly.robertomurray.co.uk/delay/5000/url/${url}`;
-    await fetch(url, {signal}).then(response => {
-        if (!response.ok) throw Error(response.statusText);
-        return response.text();
-    }).then(text => {
-        r.contents = text;
-    }).catch(error => {
-        console.log(error);
-        r.error = "Remote url bad response!";
+export function getRemoteFile(url, signal) {
+    return new Promise(resolve => {
+        const callback = (e) => {
+            if (e.name !== 'RESP_GET_REMOTE_FILE') return;
+            const message = e.message;
+            const data = message.data;
+            if (data.url !== url) return;
+            safari.self.removeEventListener('message', callback);
+            const response = { };
+            if (message.error) {
+                response.error = message.error;
+            } else if (message.data.code) {
+                response.contents = message.data.code;
+            } else {
+                response.error = 'Remote url bad or empty response!';
+            }
+            resolve(response);
+        };
+        safari.self.addEventListener("message", callback);
+        const data = { url: url };
+        safari.extension.dispatchMessage("REQ_GET_REMOTE_FILE", data);
     });
-    return r;
 }
 
 export function validateURL(url) {