Enabling regex causes crash and bootloop

[teemue]

Using PlatformIO and latest ESPAsyncWebServer.
Accessing http://ip/hello works but if I access /sensor, ESP crashes and bootloops.

server.on("/hello", HTTP_GET, [](AsyncWebServerRequest *request) {
  Serial.println("hello");
  request->send(200, "text / plain", "Other URL");
});

server.on("^\\/sensor\\/([0-9]+)$", HTTP_GET, [](AsyncWebServerRequest *request) {
  String sensorId = request->pathArg(0);
});

platform.ini:

[env:esp01]
platform = espressif8266
board = esp01_1m
framework = arduino
build_flags = 
  -DASYNCWEBSERVER_REGEX

[Bmooij]

Does it still crash when you add an response to the sensors request?

server.on("^\\/sensor\\/([0-9]+)$", HTTP_GET, [](AsyncWebServerRequest *request) {
  String sensorId = request->pathArg(0);
  request->send(200, "text / plain", "sensor: " + sensorId);
});

[teemue]

It crashes. Here's the full code:

#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESPAsyncWebServer.h>
#include <ESPAsyncWiFiManager.h>

AsyncWebServer server(80);
DNSServer dns;
#define HOST_NAME "ESP"

void setup()
{
  Serial.begin(115200,SERIAL_8N1,SERIAL_TX_ONLY);
  AsyncWiFiManager wifiManager(&server, &dns);
  if (!wifiManager.autoConnect())
  {
    ESP.reset();
    delay(1000);
  }

  String hostNameWifi = HOST_NAME;
  hostNameWifi.concat(".local");
  WiFi.hostname(hostNameWifi);

  server.on("/hello", HTTP_GET, [](AsyncWebServerRequest *request) {
    Serial.println("hello");
    request->send(200, "text / plain", "Other URL");
  });

  server.on("^\\/sensor\\/([0-9]+)$", HTTP_GET, [](AsyncWebServerRequest *request) {
    String sensorId = request->pathArg(0);
    request->send(200, "text / plain", "sensor: " + sensorId);
  });

  server.begin();
}

void loop()
{
}

[teemue]

I tried also without WifiManager (only ESP8266WiFi and ESPAsyncWebServer included), no effect.

[niklasdoerfler]

I can observe the same behaviour. Is there already a solution to the problem?

[Bmooij]

There is an issue with regex and the esp8266.
See:
esp8266/Arduino#6198
esp8266/Arduino#6952

There is no fix for now. When I have some time, I will rewrite the regex part and create an new pull request

[stale]

[STALE_SET] This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[stale]

[STALE_DEL] This stale issue has been automatically closed. Thank you for your contributions.

[kjyv]

still an issue, so should be reopened

[flier268]

still an issue, so should be reopened