commit 0301ff1879269e2e820779900c6e1b2c282ce18b Author: Serene Han keroserene+git@gmail.com Date: Sat Jan 23 09:27:23 2016 -0800

Query string params available in the snowflake proxy for manual mode, broker url, and target relay address --- proxy/README.md | 14 ++++++++++++++ proxy/broker.coffee | 3 +++ proxy/snowflake.coffee | 43 ++++++++++++++++++++----------------------- proxy/util.coffee | 6 ++++++ 4 files changed, 43 insertions(+), 23 deletions(-)

diff --git a/proxy/README.md b/proxy/README.md index 36c2e9c..386d686 100644 --- a/proxy/README.md +++ b/proxy/README.md @@ -9,3 +9,17 @@ cake test

To run locally, start a webserver and navigate to `snowflake.html`.

+### Parameters + +With no parameters, +snowflake uses the default relay `192.81.135.242:9901` and +uses automatic signaling with the default broker at +`https://snowflake-reg.appspot.com/%60. + + +Here are optional parameters to include in the query string. +``` +manual - enables copy-paste signalling mode. +relay=<address> - use a custom target relay. +broker=<address> - use a custom broker. +``` diff --git a/proxy/broker.coffee b/proxy/broker.coffee index 34b5a88..1af18fb 100644 --- a/proxy/broker.coffee +++ b/proxy/broker.coffee @@ -25,6 +25,9 @@ class Broker @clients = 0 @id = genSnowflakeID() log 'Contacting Broker at ' + @url + '\nSnowflake ID: ' + @id + # Ensure url has the right protocol + trailing slash. + @url = 'https://' + @url if 0 != @url.indexOf('https://', 0) + @url += '/' if '/' != @url.substr -1

# Snowflake registers with the broker using an HTTP POST request, and expects # a response from the broker containing some client offer. diff --git a/proxy/snowflake.coffee b/proxy/snowflake.coffee index edf5e56..addbaba 100644 --- a/proxy/snowflake.coffee +++ b/proxy/snowflake.coffee @@ -7,17 +7,21 @@ Uses WebRTC from the client, and websocket to the server. Assume that the webrtc client plugin is always the offerer, in which case this must always act as the answerer. ### -DEFAULT_WEBSOCKET = '192.81.135.242:9901' -DEFAULT_BROKER = 'https://snowflake-reg.appspot.com/' +DEFAULT_BROKER = 'snowflake-reg.appspot.com' +DEFAULT_RELAY = + host: '192.81.135.242' + port: 9901 COPY_PASTE_ENABLED = false DEFAULT_PORTS = http: 80 https: 443

DEBUG = false +query = null if window && window.location query = Query.parse(window.location.search.substr(1)) DEBUG = Params.getBool(query, 'debug', false) + COPY_PASTE_ENABLED = Params.getBool(query, 'manual', false) # HEADLESS is true if we are running not in a browser with a DOM. HEADLESS = 'undefined' == typeof(document)

@@ -79,34 +83,31 @@ class Snowflake @rateLimit = new BucketRateLimit(rateLimitBytes * RATE_LIMIT_HISTORY, RATE_LIMIT_HISTORY)

- # TODO: Should fetch from broker later. + # TODO: Should potentially fetch from broker later. + # Set the target relay address spec, which is expected to be a websocket relay. setRelayAddr: (relayAddr) -> - addr = Parse.address relayAddr - if !addr - log 'Invalid address spec.' - return false - @relayAddr = addr - log 'Using ' + relayAddr + ' as Relay.' + @relayAddr = relayAddr + log 'Using ' + relayAddr.host + ':' + relayAddr.port + ' as Relay.' log 'Input offer from the snowflake client:' if COPY_PASTE_ENABLED return true

# Initialize WebRTC PeerConnection - beginWebRTC: -> + beginWebRTC: (automatic) -> @state = MODE.WEBRTC_CONNECTING for i in [1..CONNECTIONS_PER_CLIENT] @makeProxyPair @relayAddr @proxyPair = @proxyPairs[0] + return if !automatic # Poll broker for clients. findClients = => recv = broker.getClientOffer() - recv.then((desc) => + recv.then (desc) => offer = JSON.parse desc log 'Received:\n\n' + offer.sdp + '\n' @receiveOffer offer , (err) -> log err setTimeout(findClients, 1000) - ) findClients()

# Receive an SDP offer from some client assigned by the Broker. @@ -176,11 +177,6 @@ Interface = if !COPY_PASTE_ENABLED log 'No input expected - Copy Paste Signalling disabled.' else switch snowflake.state - when MODE.INIT - # Set target relay. - if !(snowflake.setRelayAddr msg) - log 'Defaulting to websocket relay at ' + DEFAULT_WEBSOCKET - snowflake.setRelayAddr DEFAULT_WEBSOCKET when MODE.WEBRTC_CONNECTING Signalling.receive msg when MODE.WEBRTC_READY @@ -229,13 +225,14 @@ init = -> $input.onkeydown = (e) -> $send.onclick() if 13 == e.keyCode # enter

log '== snowflake browser proxy ==' - broker = new Broker DEFAULT_BROKER + log 'Copy-Paste mode detected.' if COPY_PASTE_ENABLED + brokerUrl = Params.getString(query, 'broker', DEFAULT_BROKER) + broker = new Broker brokerUrl snowflake = new Snowflake(broker) window.snowflake = snowflake - if COPY_PASTE_ENABLED - log 'Input desired relay address:' - else - snowflake.setRelayAddr DEFAULT_WEBSOCKET - snowflake.beginWebRTC() + + relayAddr = Params.getAddress(query, 'relay', DEFAULT_RELAY) + snowflake.setRelayAddr relayAddr + snowflake.beginWebRTC(!COPY_PASTE_ENABLED)

window.onload = init if window diff --git a/proxy/util.coffee b/proxy/util.coffee index eaf8f9d..ea65e63 100644 --- a/proxy/util.coffee +++ b/proxy/util.coffee @@ -117,6 +117,12 @@ Params = return defaultValue if undefined == val Parse.address val

+ # Get an object value and return it as a string. Returns default_val if param + # is not a key. + getString: (query, param, defaultValue) -> + val = query[param] + return defaultValue if undefined == val + val

class BucketRateLimit amount: 0.0