From 73c43dbf8b253f97f5edaae3e921ac81fbd6f1ab Mon Sep 17 00:00:00 2001
From: Sergey Krashevich <svk@svk.su>
Date: Mon, 16 Feb 2026 04:50:24 +0300
Subject: [PATCH] Add CDN dependency download script and update Dockerfiles for
 offline web UI

---
 docker/Dockerfile          |  15 ++++--
 docker/download_cdn.sh     | 105 +++++++++++++++++++++++++++++++++++++
 docker/entrypoint.sh       |  12 +++++
 docker/hardware.Dockerfile |  15 ++++--
 docker/rockchip.Dockerfile |  16 ++++--
 5 files changed, 153 insertions(+), 10 deletions(-)
 create mode 100644 docker/download_cdn.sh
 create mode 100644 docker/entrypoint.sh

diff --git a/docker/Dockerfile b/docker/Dockerfile
index 9efded4b..2c095d48 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -26,7 +26,15 @@ COPY . .
 RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath
 
 
-# 2. Final image
+# 2. Download CDN dependencies for offline web UI
+FROM alpine AS download-cdn
+RUN apk add --no-cache wget
+COPY www/ /web/
+COPY docker/download_cdn.sh /tmp/
+RUN sh /tmp/download_cdn.sh /web
+
+
+# 3. Final image
 FROM python:${PYTHON_VERSION}-alpine AS base
 
 # Install ffmpeg, tini (for signal handling),
@@ -46,10 +54,11 @@ RUN if [ "${TARGETARCH}" = "amd64" ]; then apk add --no-cache libva-intel-driver
 # RUN libva-vdpau-driver mesa-vdpau-gallium (+150MB total)
 
 COPY --from=build /build/go2rtc /usr/local/bin/
+COPY --from=download-cdn /web /var/www/go2rtc
+COPY --chmod=755 docker/entrypoint.sh /usr/local/bin/
 
 EXPOSE 1984 8554 8555 8555/udp
-ENTRYPOINT ["/sbin/tini", "--"]
+ENTRYPOINT ["/sbin/tini", "--", "/usr/local/bin/entrypoint.sh"]
 VOLUME /config
 WORKDIR /config
 
-CMD ["go2rtc", "-config", "/config/go2rtc.yaml"]
diff --git a/docker/download_cdn.sh b/docker/download_cdn.sh
new file mode 100644
index 00000000..16b5e2d2
--- /dev/null
+++ b/docker/download_cdn.sh
@@ -0,0 +1,105 @@
+#!/bin/sh
+# Downloads CDN dependencies from jsdelivr for offline web UI.
+# Automatically parses CDN URLs from HTML files, so updating
+# a library version in HTML is all that's needed.
+#
+# Usage: download_cdn.sh <web_dir>
+set -e
+
+WEB_DIR="${1:?Usage: download_cdn.sh <web_dir>}"
+CDN_DIR="$WEB_DIR/cdn"
+mkdir -p "$CDN_DIR"
+
+# Step 1: Extract all jsdelivr CDN URLs from HTML files
+URLS=$(grep -roh 'https://cdn\.jsdelivr\.net/npm/[^"'"'"' )`]*' "$WEB_DIR"/*.html | sort -u)
+
+echo "=== Found CDN URLs ==="
+echo "$URLS"
+echo ""
+
+# Step 2: Process each URL
+MONACO_VER=""
+for url in $URLS; do
+    # Remove CDN prefix to get npm path
+    npm_path="${url#https://cdn.jsdelivr.net/npm/}"
+
+    # Extract package@version and file path
+    pkg_ver=$(echo "$npm_path" | cut -d/ -f1)
+    remaining=$(echo "$npm_path" | cut -d/ -f2-)
+    if [ "$remaining" = "$npm_path" ]; then
+        file_path=""
+    else
+        file_path="$remaining"
+    fi
+
+    pkg_name=$(echo "$pkg_ver" | sed 's/@[^@]*$//')
+
+    # Monaco editor: remember version, download as tarball later
+    case "$pkg_name" in
+        monaco-editor)
+            MONACO_VER=$(echo "$pkg_ver" | sed 's/.*@//')
+            echo "Monaco editor v$MONACO_VER (will download tarball)"
+            continue
+            ;;
+    esac
+
+    # Determine local file path
+    if [ -n "$file_path" ]; then
+        local_file="$CDN_DIR/$pkg_name/$file_path"
+    else
+        local_file="$CDN_DIR/$pkg_name/index.js"
+    fi
+
+    mkdir -p "$(dirname "$local_file")"
+    echo "Downloading $pkg_ver -> $local_file"
+    wget -q -O "$local_file" "$url"
+done
+
+# Step 3: Download monaco-editor tarball and extract min/ directory
+# The AMD loader dynamically loads modules, so we need the entire min/vs/ tree
+if [ -n "$MONACO_VER" ]; then
+    echo ""
+    echo "=== Downloading monaco-editor@$MONACO_VER tarball ==="
+
+    TARBALL_URL=$(wget -q -O - "https://registry.npmjs.org/monaco-editor/$MONACO_VER" | \
+        grep -o '"tarball":"[^"]*"' | head -1 | cut -d'"' -f4)
+
+    mkdir -p /tmp/monaco "$CDN_DIR/monaco-editor"
+    wget -q -O /tmp/monaco.tgz "$TARBALL_URL"
+    tar xzf /tmp/monaco.tgz -C /tmp/monaco
+
+    cp -r /tmp/monaco/package/min "$CDN_DIR/monaco-editor/"
+    rm -rf /tmp/monaco /tmp/monaco.tgz
+
+    echo "  Extracted min/ directory ($(du -sh "$CDN_DIR/monaco-editor/min" | cut -f1))"
+fi
+
+# Step 4: Patch HTML files to use local paths instead of CDN URLs
+echo ""
+echo "=== Patching HTML files ==="
+for url in $URLS; do
+    npm_path="${url#https://cdn.jsdelivr.net/npm/}"
+
+    pkg_ver=$(echo "$npm_path" | cut -d/ -f1)
+    remaining=$(echo "$npm_path" | cut -d/ -f2-)
+    if [ "$remaining" = "$npm_path" ]; then
+        file_path=""
+    else
+        file_path="$remaining"
+    fi
+
+    pkg_name=$(echo "$pkg_ver" | sed 's/@[^@]*$//')
+
+    if [ -n "$file_path" ]; then
+        local_url="cdn/$pkg_name/$file_path"
+    else
+        local_url="cdn/$pkg_name/index.js"
+    fi
+
+    echo "  $url -> $local_url"
+    sed -i "s|$url|$local_url|g" "$WEB_DIR"/*.html
+done
+
+echo ""
+echo "=== Done ==="
+du -sh "$CDN_DIR"
diff --git a/docker/entrypoint.sh b/docker/entrypoint.sh
new file mode 100644
index 00000000..0e0bb3cd
--- /dev/null
+++ b/docker/entrypoint.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+# Entrypoint wrapper for go2rtc Docker container.
+# If /var/www/go2rtc exists (CDN files bundled), automatically
+# configures static_dir to serve web UI without internet access.
+if [ -d /var/www/go2rtc ]; then
+    exec go2rtc \
+        -config '{"api":{"static_dir":"/var/www/go2rtc"}}' \
+        -config /config/go2rtc.yaml \
+        "$@"
+else
+    exec go2rtc -config /config/go2rtc.yaml "$@"
+fi
diff --git a/docker/hardware.Dockerfile b/docker/hardware.Dockerfile
index 563843b5..e972d59b 100644
--- a/docker/hardware.Dockerfile
+++ b/docker/hardware.Dockerfile
@@ -26,7 +26,15 @@ COPY . .
 RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath
 
 
-# 2. Final image
+# 2. Download CDN dependencies for offline web UI
+FROM alpine AS download-cdn
+RUN apk add --no-cache wget
+COPY www/ /web/
+COPY docker/download_cdn.sh /tmp/
+RUN sh /tmp/download_cdn.sh /web
+
+
+# 3. Final image
 FROM debian:${DEBIAN_VERSION}
 
 # Prepare apt for buildkit cache
@@ -48,13 +56,14 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked --mount=type=cache,t
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
 COPY --from=build /build/go2rtc /usr/local/bin/
+COPY --from=download-cdn /web /var/www/go2rtc
+COPY --chmod=755 docker/entrypoint.sh /usr/local/bin/
 
 EXPOSE 1984 8554 8555 8555/udp
-ENTRYPOINT ["/usr/bin/tini", "--"]
+ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/entrypoint.sh"]
 VOLUME /config
 WORKDIR /config
 # https://github.com/NVIDIA/nvidia-docker/wiki/Installation-(Native-GPU-Support)
 ENV NVIDIA_VISIBLE_DEVICES all
 ENV NVIDIA_DRIVER_CAPABILITIES compute,video,utility
 
-CMD ["go2rtc", "-config", "/config/go2rtc.yaml"]
diff --git a/docker/rockchip.Dockerfile b/docker/rockchip.Dockerfile
index 6ab924ee..12bfd002 100644
--- a/docker/rockchip.Dockerfile
+++ b/docker/rockchip.Dockerfile
@@ -24,7 +24,15 @@ COPY . .
 RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath
 
 
-# 2. Final image
+# 2. Download CDN dependencies for offline web UI
+FROM alpine AS download-cdn
+RUN apk add --no-cache wget
+COPY www/ /web/
+COPY docker/download_cdn.sh /tmp/
+RUN sh /tmp/download_cdn.sh /web
+
+
+# 3. Final image
 FROM python:${PYTHON_VERSION}
 
 # Prepare apt for buildkit cache
@@ -42,10 +50,10 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked --mount=type=cache,t
 
 COPY --from=build /build/go2rtc /usr/local/bin/
 ADD --chmod=755 https://github.com/MarcA711/Rockchip-FFmpeg-Builds/releases/download/6.1-8-no_extra_dump/ffmpeg /usr/local/bin
+COPY --from=download-cdn /web /var/www/go2rtc
+COPY --chmod=755 docker/entrypoint.sh /usr/local/bin/
 
 EXPOSE 1984 8554 8555 8555/udp
-ENTRYPOINT ["/usr/bin/tini", "--"]
+ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/entrypoint.sh"]
 VOLUME /config
 WORKDIR /config
-
-CMD ["go2rtc", "-config", "/config/go2rtc.yaml"]