Context: I developed a Telegram bot that logs important errors in our chat. This bot has functioned properly in another Symfony application (version 4.4). However, when I attempt to use it in a Symfony 3.4 project, I receive the following error when an error occurs:
resulted in a `400 Bad Request` response:
{"ok":false,"error_code":400,"description":"Bad Request: can't parse entities: Can't find end of the entity starting at (truncated..."
Observation: Changing the parse_mode from Markdown to HTML resolves this issue. I am trying to understand why this discrepancy exists.
Attempted Message Structure:
$message = "$user encountered an error at: $path\n`$error`\nFile: $line";
Function for Sending Request:
/**
* @param $method
* @param $headers
* @param $body
* @return mixed|ResponseInterface
* @throws GuzzleException
*/
public function callAPI($method, $headers, $body) {
$client = new Client();
$url = 'https://api.telegram.org/bot' . $this->telegramToken . '/' . $method;
return $client->request('POST', $url, [
'headers' => $headers,
'form_params' => $body,
]);
}
/**
* @param $telegramId
* @param $messageText
* @return mixed|ResponseInterface
* @throws GuzzleException
*/
public function notify($telegramId, $messageText) {
try {
return $this->callAPI('sendMessage', [
'Content-Type' => 'application/x-www-form-urlencoded',
'Accept' => 'application/json',
], [
'chat_id' => $telegramId,
'parse_mode' => 'Markdown',
'text' => $messageText,
'disable_web_page_preview' => true,
]);
} catch (Exception $ex) {
return $ex->getMessage();
}
}
Thanks for your assistance!
I’ve faced a similar problem before. Often, the issue comes down to the Markdown parsing rules not being strictly adhered to, as even a minor deviation can cause the parser in Telegram to misinterpret the message. Make sure that any special Markdown characters (like underscores or asterisks) that are not meant to be syntax are properly escaped. In your Symfony 4.4 instance, there might have been a library or update that auto-corrected these, whereas Symfony 3.4 might not handle it as gracefully. Also, ensure every backtick or asterisk is properly matched with a closing one and avoid using line breaks too freely within code blocks. If HTML works without issues, your best bet for immediate stability might be to switch to HTML parsing unless specific Markdown features are irreplaceable for your use-case.
I’ve seen ths occur when special charactrs within error messages aren’t properly escaped. In Markdown, certain symbols have specific functions, so run a check to escape such chars. Symfony versions may handle these differences in parsing so switching to HTML could actually b the simplest quick fix.
From my experience, inconsistencies between different environments or versions can cause these issues. In Symfony 3.4, the Markdown handler might not be as robust as in 4.4. One factor could also be different default behavior in error handling or string encoding between these Symfony versions. If manually escaping characters or adjusting structure proves complex, persisting with HTML for parsing could be wise, given that the errors are meant for logging and not public display, sacrificing Markdown’s formatting might be worth the trade-off for consistent functionality.
I’ve dealt with similar hurdles while integrating Telegram bots across different Symfony versions. What I’ve noticed is that sometimes the issue lies in how the different version manage strings, especially when special characters are involved. Symfony 3.4 might have variations in handling character encoding or special symbols, which affects Markdown parsing. Also, ensure that the PHP version and dependencies match between the environments, as any discrepancies could exacerbate parsing issues. Just switching to HTML seems like a reasonable choice if Markdown doesn’t bring any definite advantages for your current requirements.