Merge remote-tracking branch 'upstream'

.github/workflows/ci.yml

@@ -38,11 +38,11 @@ jobs:
       matrix:
         stable: [true]
         crystal:
-          - 1.12.2
-          - 1.13.3
           - 1.14.1
           - 1.15.1
           - 1.16.3
+          - 1.17.1
+          - 1.18.2
         include:
           - crystal: nightly
             stable: false
@@ -63,7 +63,7 @@ jobs:
           crystal: ${{ matrix.crystal }}
 
       - name: Cache Shards
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ./lib
@@ -139,7 +139,7 @@ jobs:
           crystal: latest
 
       - name: Cache Shards
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ./lib

docker/Dockerfile

@@ -1,20 +1,34 @@
 # https://github.com/openssl/openssl/releases/tag/openssl-3.5.2
 ARG OPENSSL_VERSION='3.5.2'
+ARG OPENSSL_SHA256='c53a47e5e441c930c3928cf7bf6fb00e5d129b630e0aa873b08258656e7345ec'
 
-FROM mirror.gcr.io/84codes/crystal:1.16.3-alpine AS builder
+FROM mirror.gcr.io/84codes/crystal:1.18.2-alpine AS dependabot-crystal
+
+# We compile openssl ourselves due to a memory leak in how crystal interacts
+# with openssl
+# Reference: https://github.com/iv-org/invidious/issues/1438#issuecomment-3087636228
+FROM dependabot-crystal AS openssl-builder
+RUN apk add --no-cache curl perl linux-headers
+
+WORKDIR /
+
+ARG OPENSSL_VERSION
+ARG OPENSSL_SHA256
+RUN curl -Ls "https://github.com/openssl/openssl/releases/download/openssl-${OPENSSL_VERSION}/openssl-${OPENSSL_VERSION}.tar.gz" --output openssl-${OPENSSL_VERSION}.tar.gz
+RUN echo "${OPENSSL_SHA256}  openssl-${OPENSSL_VERSION}.tar.gz" | sha256sum -c
+RUN tar -xzvf openssl-${OPENSSL_VERSION}.tar.gz
+
+RUN cd openssl-${OPENSSL_VERSION} && ./Configure --openssldir=/etc/ssl && make -j$(nproc)
+
+FROM dependabot-crystal AS builder
 
 RUN apk add --no-cache sqlite-static yaml-static
 RUN apk del openssl-dev openssl-libs-static
-RUN apk add curl perl linux-headers
 
 ARG release
 
 WORKDIR /invidious
 
-ARG OPENSSL_VERSION
-RUN curl -Ls "https://github.com/openssl/openssl/releases/download/openssl-${OPENSSL_VERSION}/openssl-${OPENSSL_VERSION}.tar.gz" | tar xz
-RUN cd openssl-${OPENSSL_VERSION} && ./Configure --openssldir=/etc/ssl && make -j
-
 COPY ./shard.yml ./shard.yml
 COPY ./shard.lock ./shard.lock
 
@@ -30,14 +44,26 @@ COPY ./scripts/ ./scripts/
 COPY ./assets/ ./assets/
 COPY ./videojs-dependencies.yml ./videojs-dependencies.yml
 
-RUN --mount=type=cache,target=/root/.cache/crystal \
+RUN crystal spec --warnings all \
-        PKG_CONFIG_PATH=$PWD/openssl-${OPENSSL_VERSION} \
+    --link-flags "-lxml2 -llzma"
+
+ARG OPENSSL_VERSION
+COPY --from=openssl-builder /openssl-${OPENSSL_VERSION} /openssl-${OPENSSL_VERSION}
+
+RUN --mount=type=cache,target=/root/.cache/crystal if [[ "${release}" == 1 ]] ; then \
+        PKG_CONFIG_PATH=/openssl-${OPENSSL_VERSION} \
         crystal build ./src/invidious.cr \
         --release -s -p -t --mcpu=x86-64-v2 \
         --static --warnings all \
-        --link-flags "-lxml2 -llzma";
+        --link-flags "-lxml2 -llzma"; \
+    else \
+        PKG_CONFIG_PATH=/openssl-${OPENSSL_VERSION} \
+        crystal build ./src/invidious.cr \
+        --static --warnings all \
+        --link-flags "-lxml2 -llzma"; \
+    fi
 
-FROM mirror.gcr.io/alpine:3.22
+FROM mirror.gcr.io/alpine:3.23
 RUN apk add --no-cache rsvg-convert ttf-opensans tini tzdata
 WORKDIR /invidious
 RUN addgroup -g 1000 -S invidious && \

docker/Dockerfile.arm64

@@ -1,6 +1,31 @@
-FROM alpine:3.23 AS builder
+# https://github.com/openssl/openssl/releases/tag/openssl-3.5.2
-RUN apk add --no-cache 'crystal=1.14.0-r0' shards sqlite-static yaml-static yaml-dev libxml2-static \
+ARG OPENSSL_VERSION='3.5.2'
-       zlib-static openssl-libs-static openssl-dev musl-dev xz-static
+ARG OPENSSL_SHA256='c53a47e5e441c930c3928cf7bf6fb00e5d129b630e0aa873b08258656e7345ec'
+
+FROM alpine:3.23 AS dependabot-alpine
+
+# We compile openssl ourselves due to a memory leak in how crystal interacts
+# with openssl
+# Reference: https://github.com/iv-org/invidious/issues/1438#issuecomment-3087636228
+FROM dependabot-alpine AS openssl-builder
+RUN apk add --no-cache curl perl linux-headers build-base
+
+WORKDIR /
+
+ARG OPENSSL_VERSION
+ARG OPENSSL_SHA256
+RUN curl -Ls "https://github.com/openssl/openssl/releases/download/openssl-${OPENSSL_VERSION}/openssl-${OPENSSL_VERSION}.tar.gz" --output openssl-${OPENSSL_VERSION}.tar.gz
+RUN echo "${OPENSSL_SHA256}  openssl-${OPENSSL_VERSION}.tar.gz" | sha256sum -c
+RUN tar -xzvf openssl-${OPENSSL_VERSION}.tar.gz
+
+RUN cd openssl-${OPENSSL_VERSION} && ./Configure --openssldir=/etc/ssl && make -j$(nproc)
+
+FROM dependabot-alpine AS builder
+RUN apk add --no-cache 'crystal=1.18.2-r0' shards \
+        sqlite-static yaml-static yaml-dev \
+        pcre2-static gc-static \
+        libxml2-static zlib-static \
+        openssl-libs-static openssl-dev musl-dev xz-static
 
 ARG release
 
@@ -22,12 +47,17 @@ COPY ./videojs-dependencies.yml ./videojs-dependencies.yml
 RUN crystal spec --warnings all \
     --link-flags "-lxml2 -llzma"
 
+ARG OPENSSL_VERSION
+COPY --from=openssl-builder /openssl-${OPENSSL_VERSION} /openssl-${OPENSSL_VERSION}
+
 RUN --mount=type=cache,target=/root/.cache/crystal if [[ "${release}" == 1 ]] ; then \
+        PKG_CONFIG_PATH=/openssl-${OPENSSL_VERSION} \
         crystal build ./src/invidious.cr \
         --release \
         --static --warnings all \
         --link-flags "-lxml2 -llzma"; \
     else \
+        PKG_CONFIG_PATH=/openssl-${OPENSSL_VERSION} \
         crystal build ./src/invidious.cr \
         --static --warnings all \
         --link-flags "-lxml2 -llzma"; \

spec/http_server/handlers/static_assets_handler/test.txt

@@ -0,0 +1 @@
+Hello world

spec/http_server/handlers/static_assets_handler_spec.cr

@@ -0,0 +1,233 @@
+# Due to the way that specs are handled this file cannot be run together with
+# everything else without causing a compile time error that'll be incredibly
+# annoying to resolve.
+#
+# TODO: Create different spec categories that can then be ran through make.
+#       An implementation of this can be seen with the tests for the Crystal compiler itself.
+#
+# For now run this with `crystal spec spec/http_server/handlers/static_assets_handler_spec.cr -Drunning_by_self`
+
+{% skip_file if compare_versions(Crystal::VERSION, "1.17.0-dev") < 0 || !flag?(:running_by_self) %}
+
+require "http"
+require "spectator"
+require "../../../src/invidious/http_server/static_assets_handler.cr"
+
+private def get_static_assets_handler
+  return Invidious::HttpServer::StaticAssetsHandler.new "spec/http_server/handlers/static_assets_handler", directory_listing: false
+end
+
+# Slightly modified version of `handle` function from
+#
+# https://github.com/crystal-lang/crystal/blob/3f369d2c721e9462d9f6126cb0bcd4c6992f0225/spec/std/http/server/handlers/static_file_handler_spec.cr#L5
+
+private def handle(request, handler : HTTP::Handler? = nil, decompress : Bool = false)
+  io = IO::Memory.new
+  response = HTTP::Server::Response.new(io)
+  context = HTTP::Server::Context.new(request, response)
+
+  if !handler
+    handler = get_static_assets_handler
+    get_static_assets_handler.call context
+  else
+    handler.call(context)
+  end
+
+  response.close
+  io.rewind
+
+  HTTP::Client::Response.from_io(io, decompress: decompress)
+end
+
+# Makes and yields a temporary file with the given prefix
+private def make_temporary_file(prefix, contents = nil, &)
+  tempfile = File.tempfile(prefix, "static_assets_handler_spec", dir: "spec/http_server/handlers/static_assets_handler")
+  file_link = "/#{File.basename(tempfile.path)}"
+  yield tempfile, file_link
+ensure
+  tempfile.try &.delete
+end
+
+# Changes the contents of the temporary file after yield
+private def cycle_temporary_file_contents(temporary_file, initial, &)
+  temporary_file.rewind << initial
+  temporary_file.rewind.flush
+  yield
+  temporary_file.rewind << "something else"
+  temporary_file.rewind.flush
+end
+
+# Get relative file path to a file within the static_assets_handler folder
+macro get_file_path(basename)
+  "spec/http_server/handlers/static_assets_handler/#{ {{basename}} }"
+end
+
+Spectator.describe StaticAssetsHandler do
+  it "Can serve a file" do
+    response = handle HTTP::Request.new("GET", "/test.txt")
+    expect(response.status_code).to eq(200)
+    expect(response.body).to eq(File.read(get_file_path("test.txt")))
+  end
+
+  it "Can serve cached file" do
+    make_temporary_file("cache_test") do |temporary_file, file_link|
+      cycle_temporary_file_contents(temporary_file, "foo") do
+        expect(temporary_file.rewind.gets_to_end).to eq("foo")
+
+        # Should get cached by the first run
+        response = handle HTTP::Request.new("GET", file_link)
+        expect(response.status_code).to eq(200)
+        expect(response.body).to eq("foo")
+      end
+
+      # Temporary file is updated after `cycle_temporary_file_contents` is called
+      # but if the file is successfully cached then we'll only get the original
+      # contents.
+      response = handle HTTP::Request.new("GET", file_link)
+      expect(response.status_code).to eq(200)
+      expect(response.body).to eq("foo")
+    end
+  end
+
+  it "Adds cache headers" do
+    response = handle HTTP::Request.new("GET", "/test.txt")
+    expect(response.headers["cache_control"]).to eq("max-age=2629800")
+  end
+
+  context "Can handle range requests" do
+    it "Can serve range request" do
+      headers = HTTP::Headers{"Range" => "bytes=0-2"}
+      response = handle HTTP::Request.new("GET", "/test.txt", headers)
+
+      expect(response.status_code).to eq(206)
+      expect(response.headers["Content-Range"]?).to eq "bytes 0-2/11"
+      expect(response.body).to eq "Hel"
+    end
+
+    it "Will cache entire file even if doing partial requests" do
+      make_temporary_file("range_cache") do |temporary_file, file_link|
+        cycle_temporary_file_contents(temporary_file, "Hello world") do
+          handle HTTP::Request.new("GET", file_link, HTTP::Headers{"Range" => "bytes=0-2"})
+        end
+
+        # Second request shouldn't have changed
+        headers = HTTP::Headers{"Range" => "bytes=3-8"}
+        response = handle HTTP::Request.new("GET", file_link, headers)
+        expect(response.status_code).to eq(206)
+        expect(response.body).to eq "lo wor"
+      end
+    end
+  end
+
+  context "Is able to support compression" do
+    def decompressed(string : String)
+      decompressed = Compress::Gzip::Reader.open(IO::Memory.new(string)) do |gzip|
+        gzip.gets_to_end
+      end
+
+      return expect(decompressed)
+    end
+
+    it "For full file requests" do
+      handler = HTTP::CompressHandler.new
+      handler.next = get_static_assets_handler()
+
+      make_temporary_file("check decompression handler") do |temporary_file, file_link|
+        cycle_temporary_file_contents(temporary_file, "Hello world") do
+          response = handle HTTP::Request.new("GET", file_link, headers: HTTP::Headers{"Accept-Encoding" => "gzip"}), handler: handler
+          expect(response.headers["Content-Encoding"]).to eq("gzip")
+          decompressed(response.body).to eq("Hello world")
+        end
+
+        # Are cached requests working?
+        response = handle HTTP::Request.new("GET", file_link, headers: HTTP::Headers{"Accept-Encoding" => "gzip"}), handler: handler
+        expect(response.headers["Content-Encoding"]).to eq("gzip")
+        decompressed(response.body).to eq("Hello world")
+
+        # Able to retrieve non gzipped file?
+        response = handle HTTP::Request.new("GET", file_link), handler: handler
+        expect(response.body).to eq("Hello world")
+        expect(response.headers).to_not have_key("Content-Encoding")
+      end
+    end
+
+    # Inspired by the equivalent tests from upstream
+    it "For partial file requests" do
+      handler = HTTP::CompressHandler.new
+      handler.next = get_static_assets_handler()
+
+      make_temporary_file("check_decompression_handler_on_partial_requests") do |temporary_file, file_link|
+        cycle_temporary_file_contents(temporary_file, "Hello world this is a very long string") do
+          range_response_results = {
+            "10-20/38" => "d this is a",
+            "0-0/38"   => "H",
+            "5-9/38"   => " worl",
+          }
+
+          range_request_header_value = {"10-20", "5-9", "0-0"}.join(',')
+          range_response_header_value = range_response_results.keys
+
+          response = handle HTTP::Request.new("GET", file_link, headers: HTTP::Headers{"Range" => "bytes=#{range_request_header_value}", "Accept-Encoding" => "gzip"}), handler: handler
+          expect(response.headers["Content-Encoding"]).to eq("gzip")
+
+          # Decompress response
+          response = HTTP::Client::Response.new(
+            status: response.status,
+            headers: response.headers,
+            body_io: Compress::Gzip::Reader.new(IO::Memory.new(response.body)),
+          )
+
+          count = 0
+          MIME::Multipart.parse(response) do |headers, part|
+            part_range = headers["Content-Range"][6..]
+            expect(part_range).to be_within(range_response_header_value)
+            expect(part.gets_to_end).to eq(range_response_results[part_range])
+            count += 1
+          end
+
+          expect(count).to eq(3)
+        end
+
+        # Is the file cached?
+        temporary_file << "Something else"
+        temporary_file.flush.rewind
+
+        response = handle HTTP::Request.new("GET", file_link, headers: HTTP::Headers{"Accept-Encoding" => "gzip"}), handler: handler
+        decompressed(response.body).to eq("Hello world this is a very long string")
+      end
+    end
+  end
+
+  it "Will not cache additional files if the cache limit is reached" do
+    5.times do |times|
+      data = "a" * 1_000_000
+
+      make_temporary_file("test cache size limit #{times}") do |temporary_file, file_link|
+        cycle_temporary_file_contents(temporary_file, data) do
+          response = handle HTTP::Request.new("GET", file_link)
+          expect(response.status_code).to eq(200)
+          expect(response.body).to eq(data)
+        end
+
+        response = handle HTTP::Request.new("GET", file_link)
+        expect(response.status_code).to eq(200)
+        expect(response.body).to eq(data)
+      end
+    end
+
+    # Cache should be 5 mb so no more files will be cached.
+    make_temporary_file("test cache size limit uncached") do |temporary_file, file_link|
+      cycle_temporary_file_contents(temporary_file, "a") do
+        response = handle HTTP::Request.new("GET", file_link)
+        expect(response.status_code).to eq(200)
+        expect(response.body).to eq("a")
+      end
+
+      response = handle HTTP::Request.new("GET", file_link)
+      expect(response.status_code).to eq(200)
+      expect(response.body).to_not eq("a")
+    end
+  end
+
+  after_each { Invidious::HttpServer::StaticAssetsHandler.clear_cache }
+end

src/ext/kemal_static_file_handler.cr

@@ -1,3 +1,24 @@
+{% if compare_versions(Crystal::VERSION, "1.17.0-dev") >= 0 %}
+  # Strip StaticFileHandler from the binary
+  #
+  # This allows us to compile on 1.17.0 as the compiler won't try to
+  # semantically check the outdated upstream code.
+  class Kemal::Config
+    private def setup_static_file_handler
+    end
+  end
+
+  # Nullify `Kemal::StaticFileHandler`
+  #
+  # Needed until the next release of Kemal after 1.7
+  class Kemal::StaticFileHandler < HTTP::StaticFileHandler
+    def call(context : HTTP::Server::Context)
+    end
+  end
+
+  {% skip_file %}
+{% end %}
+
 # Since systems have a limit on number of open files (`ulimit -a`),
 # we serve them from memory to avoid 'Too many open files' without needing
 # to modify ulimit.

src/invidious.cr

@@ -86,6 +86,7 @@ HTTP_CHUNK_SIZE            = 10485760 # ~10MB
 CURRENT_BRANCH  = {{ "#{`git branch | sed -n '/* /s///p'`.strip}" }}
 CURRENT_COMMIT  = {{ "#{`git rev-list HEAD --max-count=1 --abbrev-commit`.strip}" }}
 CURRENT_VERSION = {{ "#{`git log -1 --format=%ci | awk '{print $1}' | sed s/-/./g`.strip}" }}
+CURRENT_TAG     = {{ "#{`git tag --points-at HEAD`.strip}" }}
 
 # This is used to determine the `?v=` on the end of file URLs (for cache busting). We
 # only need to expire modified assets, so we can use this to find the last commit that changes
@@ -229,19 +230,25 @@ error 500 do |env, exception|
   error_template(500, exception)
 end
 
-static_headers do |env|
-  env.response.headers.add("Cache-Control", "max-age=2629800")
-end
-
 # Init Kemal
 
-public_folder "assets"
-
 Kemal.config.powered_by_header = false
 add_handler FilteredCompressHandler.new
 add_handler APIHandler.new
 add_handler AuthHandler.new
 add_handler DenyFrame.new
+
+{% if compare_versions(Crystal::VERSION, "1.17.0-dev") >= 0 %}
+  Kemal.config.serve_static = false
+  add_handler Invidious::HttpServer::StaticAssetsHandler.new("assets", directory_listing: false)
+{% else %}
+  public_folder "assets"
+
+  static_headers do |env|
+    env.response.headers.add("Cache-Control", "max-age=2629800")
+  end
+{% end %}
+
 add_context_storage_type(Array(String))
 add_context_storage_type(Preferences)
 add_context_storage_type(Invidious::User)
@@ -256,11 +263,8 @@ Kemal.config.app_name = "Invidious"
 {% end %}
 
 Kemal.run do |config|
-  # Set max request line size if configured
+  config.server.not_nil!.max_request_line_size = 16384
-  if max_size = CONFIG.max_request_line_size
+
-    config.server.not_nil!.max_request_line_size = max_size
-  end
-  
   if socket_binding = CONFIG.socket_binding
     File.delete?(socket_binding.path)
     # Create a socket and set its desired permissions

src/invidious/helpers/crystal_class_overrides.cr

@@ -3,15 +3,28 @@
 # IPv6 addresses.
 #
 class TCPSocket
-  def initialize(host, port, dns_timeout = nil, connect_timeout = nil, blocking = false, family = Socket::Family::UNSPEC)
+  {% if compare_versions(Crystal::VERSION, "1.18.0-dev") >= 0 %}
-    Addrinfo.tcp(host, port, timeout: dns_timeout, family: family) do |addrinfo|
+    def initialize(host : String, port, dns_timeout = nil, connect_timeout = nil, blocking = false, family = Socket::Family::UNSPEC)
-      super(addrinfo.family, addrinfo.type, addrinfo.protocol, blocking)
+      Addrinfo.tcp(host, port, timeout: dns_timeout, family: family) do |addrinfo|
-      connect(addrinfo, timeout: connect_timeout) do |error|
+        super(family: addrinfo.family, type: addrinfo.type, protocol: addrinfo.protocol)
-        close
+        Socket.set_blocking(self.fd, blocking)
-        error
+        connect(addrinfo, timeout: connect_timeout) do |error|
+          close
+          error
+        end
       end
     end
-  end
+  {% else %}
+    def initialize(host : String, port, dns_timeout = nil, connect_timeout = nil, blocking = false, family = Socket::Family::UNSPEC)
+      Addrinfo.tcp(host, port, timeout: dns_timeout, family: family) do |addrinfo|
+        super(addrinfo.family, addrinfo.type, addrinfo.protocol, blocking)
+        connect(addrinfo, timeout: connect_timeout) do |error|
+          close
+          error
+        end
+      end
+    end
+  {% end %}
 end
 
 # :ditto:

src/invidious/http_server/static_assets_handler.cr

@@ -0,0 +1,120 @@
+{% skip_file if compare_versions(Crystal::VERSION, "1.17.0-dev") < 0 %}
+
+module Invidious::HttpServer
+  class StaticAssetsHandler < HTTP::StaticFileHandler
+    # In addition to storing the actual data of a file, it also implements the required
+    # getters needed for the object to imitate a `File::Stat` within `StaticFileHandler`.
+    #
+    # Since the `File::Stat` is created once in `#call` and then passed around to the
+    # rest of the class's methods, imitating the object allows us to only lookup
+    # the cache hash once for every request.
+    #
+    private record CachedFile, data : Bytes, size : Int64, modification_time : Time do
+      def directory?
+        false
+      end
+
+      def file?
+        true
+      end
+    end
+
+    CACHE_LIMIT = 5_000_000 # 5MB
+    @@current_cache_size = 0
+    @@cached_files = {} of Path => CachedFile
+
+    # Returns metadata for the requested file
+    #
+    # If the requested file is cached, a `CachedFile` is returned instead of a `File::Stat`.
+    # This represents the metadata info of a cached file and implements all the methods of `File::Stat` that
+    # is used by the `StaticAssetsHandler`.
+    #
+    # The `CachedFile` also stores the raw bytes of the cached file, and this method serves as the place where
+    # the cached file is retrieved if it exists. Though the data will only be read in `#serve_file`
+    private def file_info(expanded_path : Path)
+      file_path = @public_dir.join(expanded_path.to_kind(Path::Kind.native))
+      {@@cached_files[file_path]? || File.info?(file_path), file_path}
+    end
+
+    # Add "Cache-Control" header to the response
+    private def add_cache_headers(response_headers : HTTP::Headers, last_modified : Time) : Nil
+      super; response_headers["Cache-Control"] = "max-age=2629800"
+    end
+
+    # Serves and caches the file at the given path.
+    #
+    # This is an override of `serve_file` to allow serving a file from memory, and to cache it
+    # it as needed.
+    private def serve_file(context : HTTP::Server::Context, file_info, file_path : Path, original_file_path : Path, last_modified : Time)
+      context.response.content_type = MIME.from_filename(original_file_path.to_s, "application/octet-stream")
+
+      range_header = context.request.headers["Range"]?
+
+      # If the file is cached we can just directly serve it
+      if file_info.is_a? CachedFile
+        return dispatch_serve(context, file_info.data, file_info, range_header)
+      end
+
+      # Otherwise we'll need to read from disk and cache it
+      retrieve_bytes_from = IO::Memory.new
+      File.open(file_path) do |file|
+        # We cannot cache partial data so we'll rewind and read from the start
+        if range_header
+          dispatch_serve(context, file, file_info, range_header)
+          IO.copy(file.rewind, retrieve_bytes_from)
+        else
+          context.response.output = IO::MultiWriter.new(context.response.output, retrieve_bytes_from, sync_close: true)
+          dispatch_serve(context, file, file_info, range_header)
+        end
+      end
+
+      return flush_io_to_cache(retrieve_bytes_from, file_path, file_info)
+    end
+
+    # Writes file data to the cache
+    private def flush_io_to_cache(io, file_path, file_info)
+      if (@@current_cache_size += file_info.size) <= CACHE_LIMIT
+        @@cached_files[file_path] = CachedFile.new(io.to_slice, file_info.size, file_info.modification_time)
+      end
+    end
+
+    # Either send the file in full, or just fragments of it depending on the request
+    private def dispatch_serve(context, file, file_info, range_header)
+      if range_header
+        # an IO is needed for `serve_file_range`
+        file = file.is_a?(Bytes) ? IO::Memory.new(file, writeable: false) : file
+        serve_file_range(context, file, range_header, file_info)
+      else
+        context.response.headers["Accept-Ranges"] = "bytes"
+        serve_file_full(context, file, file_info)
+      end
+    end
+
+    # If we're serving the full file right away then there's no need for an IO at all.
+    private def serve_file_full(context : HTTP::Server::Context, file : Bytes, file_info)
+      context.response.status = :ok
+      context.response.content_length = file_info.size
+      context.response.write file
+    end
+
+    # Serves segments of a file based on the `Range header`
+    #
+    # An override of `serve_file_range` to allow using a generic IO rather than a `File`.
+    # Literally the same code as what we inherited but just with the `file` argument's type
+    # being set to `IO` rather than `File`
+    #
+    # Can be removed once https://github.com/crystal-lang/crystal/issues/15817 is fixed.
+    private def serve_file_range(context : HTTP::Server::Context, file : IO, range_header : String, file_info)
+      # Paste in the body of inherited serve_file_range
+      {{@type.superclass.methods.select(&.name.==("serve_file_range"))[0].body}}
+    end
+
+    # Clear cached files.
+    #
+    # This is only used in the specs to clear the cache before each handler test
+    def self.clear_cache
+      @@current_cache_size = 0
+      return @@cached_files.clear
+    end
+  end
+end

src/invidious/routes/companion.cr

@@ -1,5 +1,5 @@
 module Invidious::Routes::Companion
-  # /companion
+  # GET /companion
   def self.get_companion(env)
     current_companion = env.get("current_companion").as(Int32)
 
@@ -18,6 +18,24 @@ module Invidious::Routes::Companion
     end
   end
 
+  # POST /companion
+  def self.post_companion(env)
+    url = env.request.path
+    if env.request.query
+      url += "?#{env.request.query}"
+    end
+
+    begin
+      COMPANION_POOL.client do |wrapper|
+        wrapper.client.post(url, env.request.headers, env.request.body) do |resp|
+          return self.proxy_companion(env, resp)
+        end
+      end
+    rescue ex
+    end
+  end
+
+
   def self.options_companion(env)
     current_companion = env.get("current_companion").as(Int32)
 

src/invidious/routes/login.cr

@@ -98,6 +98,8 @@ module Invidious::Routes::Login
 
             begin
               validate_request(tokens[0], answer, env.request, HMAC_KEY, locale)
+            rescue ex : InfoException
+              return error_template(400, InfoException.new("Erroneous CAPTCHA"))
             rescue ex
               return error_template(400, ex)
             end

src/invidious/routing.cr

@@ -230,6 +230,7 @@ module Invidious::Routing
   def register_companion_routes
     if CONFIG.invidious_companion.present?
       get "/companion/*", Routes::Companion, :get_companion
+      post "/companion/*", Routes::Companion, :post_companion
       options "/companion/*", Routes::Companion, :options_companion
     end
   end

src/invidious/views/template.ecr

@@ -344,8 +344,21 @@
                     <% else %>
                         <%= translate(locale, "Current version: ") %>
                     <% end %>
-                    
+                    <% if CONFIG.modified_source_code_url %>
-                    <%= CURRENT_VERSION %>-<%= CURRENT_COMMIT %> @ <%= CURRENT_BRANCH %>
+                        <a href="<%= CONFIG.modified_source_code_url %>/commit/<%= CURRENT_COMMIT %>"><%= CURRENT_VERSION %>-<%= CURRENT_COMMIT %></a>
+                    <% else %>
+                        <a href="https://github.com/iv-org/invidious/commit/<%= CURRENT_COMMIT %>"><%= CURRENT_VERSION %>-<%= CURRENT_COMMIT %></a>
+                    <% end %>
+                    @ <%= CURRENT_BRANCH %>
+                    <% if CURRENT_TAG != "" %>
+                    (
+                        <% if CONFIG.modified_source_code_url %>
+                            <a href="<%= CONFIG.modified_source_code_url %>/releases/tag/<%= CURRENT_TAG %>"><%= CURRENT_TAG %></a>
+                        <% else %>
+                            <a href="https://github.com/iv-org/invidious/releases/tag/<%= CURRENT_TAG %>"><%= CURRENT_TAG %></a>
+                        <% end %>
+                    )
+                    <% end %>
                 </span>
                 <div class="right">
                     <a href="/privacy" title="<%= translate(locale, "footer_privacy_policy_link")%>"><%= translate(locale, "footer_privacy_policy_link") %></a>