AsyncSPIFFSEditor.h

class SPIFFSEditor: public AsyncWebHandler {
  private:
    String _username;
    String _password;
    bool _uploadAuthenticated;
    uint32_t _startTime;
  public:
    SPIFFSEditor(String username=String(), String password=String()):_username(username),_password(password),_uploadAuthenticated(false),_startTime(0){}
    bool canHandle(AsyncWebServerRequest *request){
      if(request->method() == HTTP_GET && request->url() == "/edit" && (SPIFFS.exists("/edit.htm") || SPIFFS.exists("/edit.htm.gz")))
        return true;
      else if(request->method() == HTTP_GET && request->url() == "/list")
        return true;
      else if(request->method() == HTTP_GET && (request->url().endsWith("/") || SPIFFS.exists(request->url()) || (!request->hasParam("download") && SPIFFS.exists(request->url()+".gz"))))
        return true;
      else if(request->method() == HTTP_POST && request->url() == "/edit")
        return true;
      else if(request->method() == HTTP_DELETE && request->url() == "/edit")
        return true;
      else if(request->method() == HTTP_PUT && request->url() == "/edit")
        return true;
      return false;
    }

    void handleRequest(AsyncWebServerRequest *request){
      if(_username.length() && (request->method() != HTTP_GET || request->url() == "/edit" || request->url() == "/list") && !request->authenticate(_username.c_str(),_password.c_str()))
        return request->requestAuthentication();

      if(request->method() == HTTP_GET && request->url() == "/edit"){
        request->send(SPIFFS, "/edit.htm");
      } else if(request->method() == HTTP_GET && request->url() == "/list"){
        if(request->hasParam("dir")){
          String path = request->getParam("dir")->value();
          Dir dir = SPIFFS.openDir(path);
          path = String();
          String output = "[";
          while(dir.next()){
            fs::File entry = dir.openFile("r");
            if (output != "[") output += ',';
            bool isDir = false;
            output += "{\"type\":\"";
            output += (isDir)?"dir":"file";
            output += "\",\"name\":\"";
            output += String(entry.name()).substring(1);
            output += "\"}";
            entry.close();
          }
          output += "]";
          request->send(200, "text/json", output);
          output = String();
        }
        else
          request->send(400);
      } else if(request->method() == HTTP_GET){
        String path = request->url();
        if(path.endsWith("/"))
          path += "index.htm";
        request->send(SPIFFS, path, String(), request->hasParam("download"));

      } else if(request->method() == HTTP_DELETE){
        if(request->hasParam("path", true)){
          ESP.wdtDisable();
          SPIFFS.remove(request->getParam("path", true)->value());
          ESP.wdtEnable(10);
          request->send(200, "", "DELETE: "+request->getParam("path", true)->value());
        } else
          request->send(404);
      } else if(request->method() == HTTP_POST){
        if(request->hasParam("data", true, true) && SPIFFS.exists(request->getParam("data", true, true)->value()))
          request->send(200, "", "UPLOADED: "+request->getParam("data", true, true)->value());
        else
          request->send(500);
      } else if(request->method() == HTTP_PUT){
        if(request->hasParam("path", true)){
          String filename = request->getParam("path", true)->value();
          if(SPIFFS.exists(filename)){
            request->send(200);
          } else {
            fs::File f = SPIFFS.open(filename, "w");
            if(f){
              f.write((uint8_t)0x00);
              f.close();
              request->send(200, "", "CREATE: "+filename);
            } else {
              request->send(500);
            }
          }
        } else
          request->send(400);
      }
    }

    void handleUpload(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final){
      if(!index){
        if(!_username.length() || request->authenticate(_username.c_str(),_password.c_str())){
          _uploadAuthenticated = true;
          request->_tempFile = SPIFFS.open(filename, "w");
          _startTime = millis();
        }
      }
      if(_uploadAuthenticated && request->_tempFile){
        if(len){
          ESP.wdtDisable();
          request->_tempFile.write(data,len);
          ESP.wdtEnable(10);
        }
        if(final){
          request->_tempFile.close();
          uint32_t uploadTime = millis() - _startTime;
          os_printf("upload: %s, %u B, %u ms\n", filename.c_str(), index+len, uploadTime);
        }
      }
    }
};