Not sure if I'm overseeing something or it's a bug but I can't make RocketChat bridge working with DSN format found in the documentation andcurrent bridge implementationROCKETCHAT_DSN=rocketchat://TOKEN@ENDPOINT?channel=CHANNEL

Current implementation is using WebHooks as integration method which expects URL in the form:rchost/hooks/hookid/token

I'm not sure where to put "hookid" part when configuring chatters' DSN and everything I tried produces an error. "HookId" is not official term used in RC documentation but it is a unique string generated when creating new (incoming) WebHook in the RC admin.

What worked for me as a quick/temporary solution, tested on a self-hosted RC instance as well as RC Cloud trial, was modifying DSN to new format and RocketChatTransportFactory and RocketChatTransport classes for this new format. (As a side note, in RC, when using WebHooks integration channel property in message is only needed if overriding value set while creating new WebHook in admin panel )

ROCKETCHAT_DSN=rocketchat://userId:token@rchost?channel=CHANNEL

In the example above I'm using "userId" because I modified transport class in a way to support both WebHook and REST API methods for sending a message where I'm assuming that default integration is via WebHooks but if path property has a value then REST API is used. By default WebHooks in RC are designed to post a message only and message is part of a JSON structure which has same format as REST API message.

ROCKETCHAT_DSN=rocketchat://userId:token@rchost/api/v1/chat.postMessage?channel=CHANNEL

RocketChatTransportFactory

$scheme =$dsn->getScheme();$userId =$this->getUser($dsn);$accessToken =$this->getPassword($dsn);$path =$dsn->getPath() ??null;$channel =$dsn->getOption('channel');$host ='default' ===$dsn->getHost() ?null :$dsn->getHost();$port =$dsn->getPort();if ('rocketchat' ===$scheme) {return (newRocketChatTransport($userId,$accessToken,$path,$channel,$this->client,$this->dispatcher))->setHost($host)->setPort($port);}

RocketChatTransport

if ($this->path) {$response =$this->client->request('POST',sprintf('https://%s%s',$this->getEndpoint(),$this->path),        ['headers' => [SELF::USER_HEADER =>$this->userId,SELF::TOKEN_HEADER =>$this->accessToken,            ],'json' =>array_filter($options),        ]    );}else {$response =$this->client->request('POST',sprintf('https://%s/hooks/%s/%s',$this->getEndpoint(),$this->userId,$this->accessToken),        ['json' =>array_filter($options),        ]    );}