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slightly reduce flickering during file access

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it seems that reading/writing "larger" files from LittleFS causes LED flickering.

This change adds a simple cache for "file not found" results, so that repeated file.exists() calls are avoided.
This commit is contained in:
Frank
2024-04-28 18:57:05 +02:00
parent 3567243d18
commit d058e33df3
4 changed files with 34 additions and 1 deletions
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31
wled00/file.cpp
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@@ -407,10 +407,33 @@ static String getContentType(AsyncWebServerRequest* request, String filename){
return "text/plain";
}
// WLEDMM
static bool haveLedmapFile = true;
static bool haveIndexFile = true;
static bool haveSkinFile = true;
static bool haveICOFile = true;
static bool haveCpalFile = true;
void invalidateFileNameCache() { // reset "file not found" cache
haveLedmapFile = true;
haveIndexFile = true;
haveSkinFile = true;
haveICOFile = true;
haveCpalFile = true;
}
bool handleFileRead(AsyncWebServerRequest* request, String path){
DEBUG_PRINTLN("WS FileRead: " + path);
if(path.endsWith("/")) path += "index.htm";
if(path.indexOf("sec") > -1) return false;
// WLEDMM shortcuts
if ((haveLedmapFile == false) && path.equals("/ledmap.json")) return false;
if ((haveIndexFile == false) && path.equals("/index.htm")) return false;
if ((haveSkinFile == false) && path.equals("/skin.css")) return false;
if ((haveICOFile == false) && path.equals("/favicon.ico")) return false;
if ((haveCpalFile == false) && path.equals("/cpal.htm")) return false;
// WLEDMM toDO: add file caching (PSRAM) for /presets.json an /cfg.json
String contentType = getContentType(request, path);
/*String pathWithGz = path + ".gz";
if(WLED_FS.exists(pathWithGz)){
@@ -421,5 +444,13 @@ bool handleFileRead(AsyncWebServerRequest* request, String path){
request->send(WLED_FS, path, contentType);
return true;
}
//USER_PRINTLN("WS FileRead failed: " + path + " (" + contentType + ")");
// WLEDMM cache "file not found" results (reduces LED flickering during UI activities)
if (path.equals("/ledmap.json")) haveLedmapFile = false;
if (path.equals("/index.htm")) haveIndexFile = false;
if (path.equals("/skin.css")) haveSkinFile = false;
if (path.equals("/favicon.ico")) haveICOFile = false;
if (path.equals("/cpal.htm")) haveCpalFile = false;
return false;
}