[ai] dir streaming, still problems

src/DirectoryNode.cpp

@@ -578,6 +578,44 @@ String DirectoryNode::getDirectoryStructureHTML() const {
     return html;
 }
 
+void DirectoryNode::streamDirectoryHTML(Print &out) const {
+    if (name == "/") {
+        out.println(F("<ul>"));
+        delay(0); // yield to WiFi/other tasks
+    }
+
+    if (name != "/") {
+        out.print(F("<li data-id=\""));
+        out.print(id);
+        out.print(F("\"><b>"));
+        out.print(name);
+        out.println(F("</b></li>"));
+        delay(0); // yield periodically while streaming
+    }
+
+    for (size_t i = 0; i < mp3Files.size(); i++) {
+        out.print(F("<li data-id=\""));
+        out.print(ids[i]);
+        out.print(F("\">"));
+        out.print(mp3Files[i]);
+        out.println(F("</li>"));
+        if ((i & 0x0F) == 0) { // yield every ~16 items
+            delay(0);
+        }
+    }
+
+    for (DirectoryNode* child : subdirectories) {
+        delay(0); // yield before descending
+        child->streamDirectoryHTML(out);
+        delay(0); // and after returning
+    }
+
+    if (name == "/") {
+        out.println(F("</ul>"));
+        delay(0);
+    }
+}
+
 // NEW: Calculate exact required size first
 size_t DirectoryNode::calculateHTMLSize() const {
     size_t size = 0;

src/DirectoryNode.h

@@ -1,5 +1,6 @@
 #ifndef DIRECTORYNODE_H_
 #define DIRECTORYNODE_H_
+class Print;
 
 #include <SD.h>
 #include <vector>
@@ -55,6 +56,7 @@ public:
   DirectoryNode* advanceToMP3(const uint16_t id);
   void advanceToFirstMP3InThisNode();
   String getDirectoryStructureHTML() const;
+  void streamDirectoryHTML(Print &out) const;
   size_t calculateHTMLSize() const;
   void appendIndentation(String& html, int level) const;
   DirectoryNode* findFirstDirectoryWithMP3s();

src/main.cpp

@@ -1217,15 +1217,14 @@ server.on("/", HTTP_GET, [](AsyncWebServerRequest *request)
               {
                 webreq_enter();
                 request->onDisconnect([](){ webreq_exit(); });
-                // Stream the response to avoid lifetime issues with temporary Strings and to prevent wrong Content-Length
+                // Stream the response directly from the directory tree to avoid large temporary Strings
                 AsyncResponseStream* stream = request->beginResponseStream("text/html; charset=UTF-8");
                 stream->addHeader("Cache-Control", "no-store");
                 stream->addHeader("Connection", "close");
-                // Build HTML under lock, then print into stream
+                // Generate HTML directly into the stream under lock
                 dir_lock_acquire();
-                String html = rootNode.getDirectoryStructureHTML();
+                rootNode.streamDirectoryHTML(*stream);
                 dir_lock_release();
-                stream->print(html);
                 request->send(stream);
               });
 
@@ -1508,12 +1507,8 @@ void loop()
   if (webreq_cnt > 0 && webrequest_blockings > MAX_WEBREQUEST_BLOCKINGS) {
     Serial.println("excessive webrequest blocking - suppress reset");
     // Avoid resetting server mid-response to prevent mixing headers/body or truncation
-    server.reset();
-    init_webserver();
-    
     webreq_cnt = 0;
     webrequest_blockings = 0;
-    server.begin();
   }
 
   if (audio.isRunning())

web/script.js

@@ -58,9 +58,9 @@ setInterval(updateProgress, 500); // Update progress every second
     if ((this.__url || '').indexOf('/upload') !== -1) {
       timeoutMs = 600000; // 10 minutes for uploads
     } else if (this.__method === 'GET') {
-      timeoutMs = 3500;
-    } else {
       timeoutMs = 6000;
+    } else {
+      timeoutMs = 8000;
     }
 
     if (isIdempotentGET && inflightKeys.has(key)) {