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Add support for an external signature server (#4772)

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This PR adds support for inv_sig_helper, which offloads the player fetching,
function extraction and signature parsing, which in turn allows to use the
web client to watch videos.

When the new config option "signature_server" is not set, the logic for the
external signature server is not enabled and invidious behaves like before.

This PR also updates the crystal overrides because the stdlib changed quite
a while ago (See issue 11049 at crystal-lang/crystal) and those were required
to properly use TCP/unix sockets.

Closes issue 4649
This commit is contained in:
Samantaz Fox
2024-08-13 20:26:59 +02:00
parent 88b9f17388 cc36a82933
commit 2d7869b48b
9 changed files with 466 additions and 129 deletions
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63
src/invidious/videos.cr
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@@ -98,20 +98,47 @@ struct Video
# Methods for parsing streaming data
def convert_url(fmt)
if cfr = fmt["signatureCipher"]?.try { |json| HTTP::Params.parse(json.as_s) }
sp = cfr["sp"]
url = URI.parse(cfr["url"])
params = url.query_params
LOGGER.debug("Videos: Decoding '#{cfr}'")
unsig = DECRYPT_FUNCTION.try &.decrypt_signature(cfr["s"])
params[sp] = unsig if unsig
else
url = URI.parse(fmt["url"].as_s)
params = url.query_params
end
n = DECRYPT_FUNCTION.try &.decrypt_nsig(params["n"])
params["n"] = n if n
params["host"] = url.host.not_nil!
if region = self.info["region"]?.try &.as_s
params["region"] = region
end
url.query_params = params
LOGGER.trace("Videos: new url is '#{url}'")
return url.to_s
rescue ex
LOGGER.debug("Videos: Error when parsing video URL")
LOGGER.trace(ex.inspect_with_backtrace)
return ""
end
def fmt_stream
return @fmt_stream.as(Array(Hash(String, JSON::Any))) if @fmt_stream
fmt_stream = info["streamingData"]?.try &.["formats"]?.try &.as_a.map &.as_h || [] of Hash(String, JSON::Any)
fmt_stream.each do |fmt|
if s = (fmt["cipher"]? || fmt["signatureCipher"]?).try { |h| HTTP::Params.parse(h.as_s) }
s.each do |k, v|
fmt[k] = JSON::Any.new(v)
end
fmt["url"] = JSON::Any.new("#{fmt["url"]}#{DECRYPT_FUNCTION.decrypt_signature(fmt)}")
end
fmt_stream = info.dig?("streamingData", "formats")
.try &.as_a.map &.as_h || [] of Hash(String, JSON::Any)
fmt["url"] = JSON::Any.new("#{fmt["url"]}&host=#{URI.parse(fmt["url"].as_s).host}")
fmt["url"] = JSON::Any.new("#{fmt["url"]}&region=#{self.info["region"]}") if self.info["region"]?
fmt_stream.each do |fmt|
fmt["url"] = JSON::Any.new(self.convert_url(fmt))
end
fmt_stream.sort_by! { |f| f["width"]?.try &.as_i || 0 }
@@ -121,21 +148,17 @@ struct Video
def adaptive_fmts
return @adaptive_fmts.as(Array(Hash(String, JSON::Any))) if @adaptive_fmts
fmt_stream = info["streamingData"]?.try &.["adaptiveFormats"]?.try &.as_a.map &.as_h || [] of Hash(String, JSON::Any)
fmt_stream.each do |fmt|
if s = (fmt["cipher"]? || fmt["signatureCipher"]?).try { |h| HTTP::Params.parse(h.as_s) }
s.each do |k, v|
fmt[k] = JSON::Any.new(v)
end
fmt["url"] = JSON::Any.new("#{fmt["url"]}#{DECRYPT_FUNCTION.decrypt_signature(fmt)}")
end
fmt["url"] = JSON::Any.new("#{fmt["url"]}&host=#{URI.parse(fmt["url"].as_s).host}")
fmt["url"] = JSON::Any.new("#{fmt["url"]}&region=#{self.info["region"]}") if self.info["region"]?
fmt_stream = info.dig("streamingData", "adaptiveFormats")
.try &.as_a.map &.as_h || [] of Hash(String, JSON::Any)
fmt_stream.each do |fmt|
fmt["url"] = JSON::Any.new(self.convert_url(fmt))
end
fmt_stream.sort_by! { |f| f["width"]?.try &.as_i || 0 }
@adaptive_fmts = fmt_stream
return @adaptive_fmts.as(Array(Hash(String, JSON::Any)))
end