jf-roku/docs/api/components_config_ServerDiscoveryTask.brs.html
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<h1 class="page-title">Source: components/config/ServerDiscoveryTask.brs</h1>
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<pre
class="sunlight-highlight-javascript linenums">import "pkg:/source/roku_modules/log/LogMixin.brs"
'
' Task used to discover jellyfin servers on the local network
'
sub init()
m.log = log.Logger("ServerDiscoveryTask")
m.top.functionName = "execute"
end sub
sub execute()
m.servers = []
m.serverUrlMap = {}
m.locationUrlMap = {}
'send both requests at the same time
SendSSDPBroadcast()
SendClientDiscoveryBroadcast()
ts = CreateObject("roTimespan")
maxTimeMs = 2200
'monitor each port and collect messages
while True
elapsed = ts.TotalMilliseconds()
if elapsed >= maxTimeMs
exit while
end if
msg = Wait(100, m.ssdp.port)
if msg &lt;> invalid
ProcessSSDPResponse(msg)
end if
msg = Wait(100, m.clientDiscovery.port)
if msg &lt;> invalid
ProcessClientDiscoveryResponse(msg)
end if
end while
m.top.content = m.servers
m.log.debug("Jellyfin servers found", m.servers[0], m.servers[1], m.servers[2])
end sub
sub AddServer(server)
if m.serverUrlMap[server.baseUrl] = invalid
m.serverUrlMap[server.baseUrl] = true
m.servers.push(server)
end if
end sub
sub SendClientDiscoveryBroadcast()
m.clientDiscovery = {
port: CreateObject("roMessagePort"),
address: CreateObject("roSocketAddress"),
socket: CreateObject("roDatagramSocket"),
urlTransfer: CreateObject("roUrlTransfer")
}
m.clientDiscovery.address.SetAddress("255.255.255.255:7359")
m.clientDiscovery.urlTransfer.SetPort(m.clientDiscoveryPort)
m.clientDiscovery.socket.SetMessagePort(m.clientDiscovery.port)
m.clientDiscovery.socket.SetSendToAddress(m.clientDiscovery.address)
m.clientDiscovery.socket.NotifyReadable(true)
m.clientDiscovery.socket.SetBroadcast(true)
m.clientDiscovery.socket.SendStr("Who is JellyfinServer?")
end sub
sub ProcessClientDiscoveryResponse(message)
if Type(message) = "roSocketEvent" and message.GetSocketId() = m.clientDiscovery.socket.GetId() and m.clientDiscovery.socket.IsReadable()
try
responseJson = m.clientDiscovery.socket.ReceiveStr(4096)
server = ParseJson(responseJson)
AddServer({
name: server.Name,
baseUrl: server.Address,
'hardcoded icon since this service doesn't include them
iconUrl: "pkg:/images/logo-icon120.jpg",
iconWidth: 120,
iconHeight: 120
})
m.log.info("Found Jellyfin server using client discovery", server.Address)
catch e
m.log.error("Error scanning for jellyfin server", message)
end try
end if
end sub
sub SendSSDPBroadcast()
m.ssdp = {
port: CreateObject("roMessagePort"),
address: CreateObject("roSocketAddress"),
socket: CreateObject("roDatagramSocket"),
urlTransfer: CreateObject("roUrlTransfer")
}
m.ssdp.address.SetAddress("239.255.255.250:1900")
m.ssdp.socket.SetMessagePort(m.ssdp.port)
m.ssdp.socket.SetSendToAddress(m.ssdp.address)
m.ssdp.socket.NotifyReadable(true)
m.ssdp.urlTransfer.SetPort(m.ssdp.port)
'brightscript can't escape characters in strings, so create a few vars here so we can use them in the strings below
Q = Chr(34)
CRLF = Chr(13) + Chr(10)
ssdpStr = "M-SEARCH * HTTP/1.1" + CRLF
ssdpStr += "HOST: 239.255.255.250:1900" + CRLF
ssdpStr += "MAN: " + Q + "ssdp:discover" + Q + CRLF
ssdpStr += "ST:urn:schemas-upnp-org:device:MediaServer:1" + CRLF
ssdpStr += "MX: 2" + CRLF
ssdpStr += CRLF
m.ssdp.socket.SendStr(ssdpStr)
end sub
sub ProcessSSDPResponse(message)
locationUrl = invalid
if Type (message) = "roSocketEvent" and message.GetSocketId() = m.ssdp.socket.GetId() and m.ssdp.socket.IsReadable()
recvStr = m.ssdp.socket.ReceiveStr(4096)
match = CreateObject("roRegex", "\r\nLocation:\s*(.*?)\s*\r\n", "i").Match(recvStr)
if match.Count() = 2
locationUrl = match[1]
end if
end if
if locationUrl = invalid
return
else if m.locationUrlMap[locationUrl] &lt;> invalid
m.log.warn("Already discovered this location", locationUrl)
return
end if
m.locationUrlMap[locationUrl] = true
http = CreateObject("roUrlTransfer")
http.SetUrl(locationUrl)
responseText = http.GetToString()
xml = CreateObject("roXMLElement")
'if we successfully parsed the response, process it
if xml.Parse(responseText)
deviceNode = xml.GetNamedElementsCi("device")[0]
manufacturer = deviceNode.GetNamedElementsCi("manufacturer").GetText()
'only process jellyfin servers
if lcase(manufacturer) = "jellyfin"
'find the largest icon
width = 0
server = invalid
icons = deviceNode.GetNamedElementsCi("iconList")[0].GetNamedElementsCi("icon")
for each iconNode in icons
iconUrl = iconNode.GetNamedElementsCi("url").GetText()
baseUrl = invalid
match = CreateObject("roRegex", "(.*?)\/dlna\/", "i").Match(iconUrl)
if match.Count() = 2
baseUrl = match[1]
end if
loopResult = {
name: deviceNode.GetNamedElementsCi("friendlyName").GetText(),
baseUrl: baseUrl,
iconUrl: iconUrl,
iconWidth: iconNode.GetNamedElementsCi("width")[0].GetText().ToInt(),
iconHeight: iconNode.GetNamedElementsCi("height")[0].GetText().ToInt()
}
if baseUrl &lt;> invalid and loopResult.iconWidth > width
width = loopResult.iconWidth
server = loopResult
end if
end for
AddServer(server)
m.log.info("Found jellyfin server using SSDP and DLNA", server.baseUrl)
end if
end if
end sub
</pre>
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