feat: retry 3x + warmup health check for upload (Phase 2), bump 1.0.5→1.0.6

site/static/app.js

@@ -130,6 +130,19 @@ function renderTable() {
   }
 }
 
+/** warmup() — прогрев соединения перед загрузкой */
+function warmup() {
+  return new Promise(function (resolve) {
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', '/health');
+    xhr.timeout = 3000;
+    xhr.onload = function () { resolve(true); };
+    xhr.onerror = function () { resolve(false); };
+    xhr.ontimeout = function () { resolve(false); };
+    xhr.send();
+  });
+}
+
 /** uploadAll() — последовательная загрузка всех файлов */
 async function uploadAll() {
   if (uploading || files.length === 0) return;
@@ -137,6 +150,9 @@ async function uploadAll() {
   uploadBtn.disabled = true;
   clearBtn.disabled = true;
 
+  // Прогрев соединения
+  await warmup();
+
   var totalBytes = 0;
   var totalElapsed = 0;
   var okCount = 0;
@@ -151,7 +167,7 @@ async function uploadAll() {
     renderTable();
 
     try {
-      var result = await uploadOne(f, i);
+      var result = await uploadOneWithRetry(f, i);
       f.status = 'ok';
       f.elapsed = result.elapsed_ms;
       f.speed = result.elapsed_ms > 0 ? Math.round(result.bytes / (result.elapsed_ms / 1000)) : null;
@@ -180,6 +196,32 @@ async function uploadAll() {
   fileSummary.textContent = summary;
 }
 
+/** uploadOneWithRetry(f, idx) — ретрай до 3 раз */
+function uploadOneWithRetry(f, idx) {
+  var MAX_RETRIES = 3;
+  var RETRY_DELAY = 500;  // ms
+
+  return new Promise(function (resolve, reject) {
+    var attempt = 0;
+
+    function tryUpload() {
+      attempt++;
+      uploadOne(f, idx).then(resolve).catch(function (e) {
+        if (attempt < MAX_RETRIES) {
+          f.progress = 0;
+          f.status = 'uploading';
+          renderTable();
+          setTimeout(tryUpload, RETRY_DELAY);
+        } else {
+          reject(e);
+        }
+      });
+    }
+
+    tryUpload();
+  });
+}
+
 /** uploadOne(fileEntry, idx) — читает файл в base64, отправляет как поле формы */
 function uploadOne(f, idx) {
   return new Promise(function (resolve, reject) {