Support flexible base paths and thin proxies

2026-07-08 06:38:41 +00:00
parent bbe7b6f562
commit 49e9f5e640
10 changed files with 233 additions and 29 deletions
@@ -0,0 +1,70 @@
+#!/bin/sh
+set -eu
+
+normalize_path() {
+  value="${1:-}"
+  value="/$(printf '%s' "$value" | sed -e 's#^/*##' -e 's#/*$##')"
+  if [ "$value" = "/" ]; then
+    printf ''
+  else
+    printf '%s' "$value"
+  fi
+}
+
+external_path="$(normalize_path "${AISHARE_PROXY_EXTERNAL_PATH:-/aishare}")"
+upstream_path="$(normalize_path "${AISHARE_UPSTREAM_PATH:-/aishare}")"
+upstream_origin="$(printf '%s' "${AISHARE_UPSTREAM_ORIGIN:?set AISHARE_UPSTREAM_ORIGIN}" | sed -e 's#/*$##')"
+listen_port="${AISHARE_PROXY_LISTEN:-8080}"
+server_name="${AISHARE_PROXY_SERVER_NAME:-_}"
+client_max_body_size="${AISHARE_PROXY_CLIENT_MAX_BODY_SIZE:-20m}"
+external_slash="${external_path}/"
+upstream_slash="${upstream_path}/"
+if [ -z "$external_path" ]; then external_slash="/"; fi
+if [ -z "$upstream_path" ]; then upstream_slash="/"; fi
+
+cat > /etc/nginx/conf.d/default.conf <<EOF
+server {
+    listen ${listen_port};
+    server_name ${server_name};
+
+    client_max_body_size ${client_max_body_size};
+
+    proxy_http_version 1.1;
+    proxy_ssl_server_name on;
+    proxy_set_header Host \$proxy_host;
+    proxy_set_header X-Forwarded-Host \$http_host;
+    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto \$scheme;
+    proxy_set_header X-Forwarded-Prefix ${external_path:-/};
+    proxy_set_header X-Real-Ip \$remote_addr;
+EOF
+
+write_proxy_block() {
+  location_line="$1"
+  rewrite_line="$2"
+  cat >> /etc/nginx/conf.d/default.conf <<EOF
+
+    ${location_line} {
+        ${rewrite_line}
+        proxy_redirect ${upstream_slash} ${external_slash};
+        proxy_redirect ${upstream_origin}${upstream_slash} \$scheme://\$http_host${external_slash};
+        proxy_pass ${upstream_origin};
+    }
+EOF
+}
+
+if [ -z "$external_path" ]; then
+  write_proxy_block "location /" "rewrite ^/(.*)\$ ${upstream_path}/\$1 break;"
+else
+  cat >> /etc/nginx/conf.d/default.conf <<EOF
+
+    location = ${external_path} {
+        return 301 ${external_path}/;
+    }
+EOF
+  write_proxy_block "location ^~ ${external_path}/" "rewrite ^${external_path}/?(.*)\$ ${upstream_path}/\$1 break;"
+fi
+
+cat >> /etc/nginx/conf.d/default.conf <<'EOF'
+}
+EOF