/player/playback/play: 500 Internal Server Error. "X-Plex-Target-Client-Identifier" not found.

Dev Community Dev/API Corner
1

I’m trying to figure out how to get the remote API playback to work after getting most of the other API stuff to work splendidly, but end up getting a 500 Internal Server Error. The X-Plex-Target-Client-Identifier value is retrieved from my user’s lastPrimaryServerID or machineIdentifier as done in python-plexapi (see here for implementation). Could anyone tell me what I could be doing wrong?

I’m sending the following request:

GET /player/playback/play?type=video&commandID=5 HTTP/1.1
Host: <redacted>.plex.direct:32400
User-Agent: insomnia/5.16.2
Cookie: com.plexapp.system=<redacted>
X-Plex-Token: <redacted>
X-Plex-Target-Client-Identifier: <redacted>
X-Plex-Target-Identifier: <redacted>
X-Plex-Device-Name: <redacted>
Accept: */*

And I’m receiving the following

HTTP/1.1 500 Internal Server Error
Set-Cookie: com.plexapp.system=<redacted>
Content-Length: 726
Content-Type: application/xml
Cache-Control: no-cache
Connection: Keep-Alive
Keep-Alive: timeout=20
X-Plex-Protocol: 1.0
Date: Mon, 21 May 2018 00:36:04 GMT

<?xml version='1.0' encoding='utf-8'?>
<Response code="2000" status="FrameworkException: Unable to find player with identifier <redacted>">
	<Traceback>Traceback (most recent call last):
  File "/usr/lib/plexmediaserver/Resources/Plug-ins-31d3c0c65/Framework.bundle/Contents/Resources/Versions/2/Python/Framework/components/runtime.py", line 843, in handle_request
    result = f(**d)
  File "/usr/lib/plexmediaserver/Resources/Plug-ins-31d3c0c65/System.bundle/Contents/Code/playerservice.py", line 50, in process_remote_command
    raise FrameworkException('Unable to find player with identifier %s' % identifier)
FrameworkException: Unable to find player with identifier <redacted>
</Traceback>
</Response>
2

I have the same problem. Did you find a solution?

3

When applying the command, my Plex Console is saying:

Aug 02, 2019 23:10:00.736 [] Debug — Request: [192.168.178.50:15459 (Allowed Network (Subnet))] GET /system/players/192.168.178.13/pause (13 live) GZIP Signed-in
Aug 02, 2019 23:10:00.737 [] Debug — [com.plexapp.system] Sending command over HTTP (GET): /system/players/192.168.178.13/pause
Aug 02, 2019 23:10:00.738 [] Debug — HTTP requesting GET http://127.0.0.1:57305/system/players/192.168.178.13/pause
Aug 02, 2019 23:10:00.753 [] Debug — HTTP 404 response from GET http://127.0.0.1:57305/system/players/192.168.178.13/pause
Aug 02, 2019 23:10:00.753 [] Debug — [com.plexapp.system] HTTP reply status 404, with 0 bytes of content.
Aug 02, 2019 23:10:00.754 [] Debug — Completed: [192.168.178.50:15459] 404 GET /system/players/192.168.178.13/pause (13 live) GZIP 17ms 177 bytes (pipelined: 3)

Looks like the IP gets changed and thus a 404 is returned.

4

I found the solution and documented it here: https://github.com/phillipj/node-plex-control/issues/32