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aishare/proxy/nginx/render-aishare-proxy.sh

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#!/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