Slack Slash命令 - 不在私有通道或直接消息中工作

Question

I have programmed several slash commands that show a response in public channels without any problems, but they don't show any response in private channels or direct messages.

As shown below, I am using the in_channel response type. Is there any other response type I can use or a workaround so that it works everywhere?

$data = array(
    "username" => "My_user",
    "channel" => $channel_id,
    "response_type" => "in_channel",
    "text" => $text,
    "mrkdwn" => true,
    "icon_url" => $icon_url

);

$json_string = json_encode($data);
$slack_call = curl_init($slack_webhook_url);
curl_setopt($slack_call, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($slack_call, CURLOPT_POSTFIELDS, $json_string);    
curl_setopt($slack_call, CURLOPT_CRLF, true);
curl_setopt($slack_call, CURLOPT_RETURNTRANSFER, true);                                                                      
curl_setopt($slack_call, CURLOPT_HTTPHEADER, array(                                                                          
    "Content-Type: application/json",
    "Content-Length: " . strlen($json_string))
);                                                                                                                   
$result = curl_exec($slack_call);
curl_close($slack_call);

Thanks in advance!

Answer 1

That does not look like the right approach.

Responding to slash commands

For responding to a slash command you must not send a new message back (e.g. via webhook as in your code example). Instead just respond to the request from Slack with the content of your message.

Example

$message = array (
    'response_type' => 'in_channel',
    'text' => $text
    );

header ('content-type: application/json');
echo json_encode ($message);

that is all you need.

response_type defines if the response can be seen by all members of a channel "in_channel" or only by the issuer of the slash command "ephemeral"

Please see the official documentation for more details and options.

Sending additional messages

You can of course also send a message from your script in response to the slash command. However, if you want to send a message to a private channel please note that the slash command request from Slack will not include the correct channel ID if it is used in a non-public channel. I don't think there is currently any solution or workaround for this.

You can however always send a direct message to the user by using the ID of the user as channel ID.