trust proxy

.env.example

@@ -2,6 +2,12 @@
 HOST=0.0.0.0
 PORT=3000
 
+# Public base URL of the site (the domain your users see, including scheme,
+# WITHOUT a trailing slash). When set, share links returned by the API and the
+# dashboard are absolute URLs (e.g. https://files.example.com/xmK5lLMRErlN).
+# Leave unset to keep relative paths (the browser host is used).
+PUBLIC_BASE_URL=https://files.example.com
+
 # Storage: persistent filesystem directory where uploaded files and
 # metadata live. Files survive restarts.
 STORAGE_DIR=./storage

deploy/nixos/download.nix

@@ -5,10 +5,10 @@
   ...
 }:
 let
-  cfg = config.services.downloadwf;
+  cfg = config.services.download;
 in
 {
-  options.services.downloadwf = {
+  options.services.download = {
     enable = lib.mkEnableOption "the File Drop private file host";
 
     user = lib.mkOption {
@@ -25,7 +25,7 @@ in
     storageDir = lib.mkOption {
       type = lib.types.str;
       default = "/srv/download/storage";
-      description = "Where files and metadata are persisted.";
+      description = "Persistent directory where files and metadata are stored.";
     };
 
     host = lib.mkOption {
@@ -52,7 +52,25 @@ in
       description = "Milliseconds before an uploaded file expires and is deleted.";
     };
 
+    publicBaseUrl = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Public domain of the site (e.g. https://files.example.com).";
+    };
+
     trustProxy = lib.mkEnableOption "trust of X-Forwarded-* headers (behind a reverse proxy)";
+
+    repoUrl = lib.mkOption {
+      type = lib.types.str;
+      default = "https://github.com/Kisakay/download.git";
+      description = "Git repository to clone/pull from.";
+    };
+
+    deployOnBoot = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Pull the repo at boot (like the nightcord-deploy pattern).";
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -60,11 +78,39 @@ in
       "d ${cfg.storageDir} 0755 ${cfg.user} ${cfg.user} -"
     ];
 
-    systemd.services.downloadwf = {
+    systemd.services.download-deploy = {
-      description = "File Drop private file host";
+      description = "Update download from git";
-      wantedBy = [ "multi-user.target" ];
       after = [ "network-online.target" ];
       wants = [ "network-online.target" ];
+      wantedBy = lib.mkIf cfg.deployOnBoot [ "multi-user.target" ];
+
+      path = with pkgs; [ git bun ];
+
+      serviceConfig = {
+        Type = "oneshot";
+        User = cfg.user;
+        WorkingDirectory = cfg.workingDir;
+        Environment = [ "HOME=/home/${cfg.user}" ];
+        ExecStartPost = "+${pkgs.systemd}/bin/systemctl restart download.service";
+      };
+
+      script = ''
+        set -euo pipefail
+        if [ ! -d "${cfg.workingDir}/.git" ]; then
+          git clone ${cfg.repoUrl} ${cfg.workingDir}
+        else
+          git -C ${cfg.workingDir} pull --ff-only
+        fi
+        cd ${cfg.workingDir}
+        bun install
+      '';
+    };
+
+    systemd.services.download = {
+      description = "File Drop private file host";
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      wantedBy = [ "multi-user.target" ];
 
       path = with pkgs; [ bun ];
 
@@ -73,22 +119,23 @@ in
         User = cfg.user;
         Group = cfg.user;
         WorkingDirectory = cfg.workingDir;
-        Environment = [
+        Environment =
+          [
             "HOME=/home/${cfg.user}"
             "PORT=${toString cfg.port}"
             "HOST=${cfg.host}"
             "STORAGE_DIR=${cfg.storageDir}"
             "MAX_FILE_SIZE=${cfg.maxFileSize}"
             "FILE_TTL_MS=${toString cfg.fileTtlMs}"
-        ] ++ lib.optionals cfg.trustProxy [ "TRUST_PROXY=1" ];
+          ]
+          ++ lib.optionals (cfg.publicBaseUrl != null) [ "PUBLIC_BASE_URL=${cfg.publicBaseUrl}" ]
+          ++ lib.optionals cfg.trustProxy [ "TRUST_PROXY=1" ];
 
-        # no runtime deps, so no `bun install` needed at startup
         ExecStart = "${pkgs.bun}/bin/bun src/server.ts";
         Restart = "on-failure";
         RestartSec = 3;
         TimeoutStopSec = 30;
 
-        # hardening
         NoNewPrivileges = true;
         PrivateTmp = true;
         ProtectSystem = "full";

src/config.ts

@@ -6,6 +6,7 @@ export interface Config {
   storageDir: string;
   maxFileSize: number;
   fileTtlMs: number;
+  publicBaseUrl?: string;
   rateLimitEnabled: boolean;
   rateLimitMax: number;
   rateLimitWindowMs: number;
@@ -69,15 +70,28 @@ export function loadConfig(env: Record<string, string | undefined> = process.env
     throw new Error(`Invalid RATE_LIMIT_WINDOW_MS: ${env.RATE_LIMIT_WINDOW_MS}`);
   }
 
+  const trustProxy = boolFromEnv(env.TRUST_PROXY, false);
+
+  let publicBaseUrl: string | undefined;
+  const rawBase = env.PUBLIC_BASE_URL?.trim();
+  if (rawBase) {
+    const normalized = rawBase.replace(/\/+$/, "");
+    if (!/^https?:\/\/[^\s/]+$/.test(normalized)) {
+      throw new Error(`Invalid PUBLIC_BASE_URL: "${rawBase}"`);
+    }
+    publicBaseUrl = normalized;
+  }
+
   return {
     host,
     port,
     storageDir,
     maxFileSize,
     fileTtlMs,
+    publicBaseUrl,
     rateLimitEnabled: boolFromEnv(env.RATE_LIMIT_ENABLED, true),
     rateLimitMax,
     rateLimitWindowMs,
-    trustProxy: boolFromEnv(env.TRUST_PROXY, false),
+    trustProxy,
   };
 }

src/routes/upload.ts

@@ -26,6 +26,7 @@ export async function handleUpload(
   storage: Storage,
   maxFileSize: number,
   ttlMs: number,
+  publicBaseUrl?: string,
 ): Promise<Response> {
   const contentType = req.headers.get("content-type");
   const boundary = contentType ? getBoundary(contentType) : null;
@@ -77,8 +78,9 @@ export async function handleUpload(
       expiresAt: new Date(Date.now() + ttlMs).toISOString(),
     });
 
+    const url = publicBaseUrl ? `${publicBaseUrl}/${key}` : `/${key}`;
     log("info", `upload ok id=${id} size=${size} name=${JSON.stringify(originalName)}`);
-    return json({ id, key, url: `/${key}`, originalName, size, protected: true });
+    return json({ id, key, url, originalName, size, protected: true });
   } catch (err) {
     await storage.delete(id);
     await storage.deletePartial(id);

src/server.ts

@@ -108,7 +108,7 @@ async function route(req: Request, srv: Server<undefined>): Promise<Response> {
   }
 
   if (path === "/api/upload" && method === "POST") {
-    return handleUpload(req, storage, cfg.maxFileSize, cfg.fileTtlMs);
+    return handleUpload(req, storage, cfg.maxFileSize, cfg.fileTtlMs, cfg.publicBaseUrl);
   }
 
   if (path.startsWith("/api/auth/") && method === "POST") {