Support subdirectory deployment and fix API path handling

app/manifest.ts

@@ -6,19 +6,19 @@ export default function manifest(): MetadataRoute.Manifest {
         short_name: "AIDraw.io",
         description:
             "Create AWS architecture diagrams, flowcharts, and technical diagrams using AI. Free online tool integrating draw.io with AI assistance for professional diagram creation.",
-        start_url: "/",
+        start_url: process.env.NEXT_PUBLIC_BASE_PATH || "/",
         display: "standalone",
         background_color: "#f9fafb",
         theme_color: "#171d26",
         icons: [
             {
-                src: "/favicon-192x192.png",
+                src: `${process.env.NEXT_PUBLIC_BASE_PATH}/favicon-192x192.png`,
                 sizes: "192x192",
                 type: "image/png",
                 purpose: "any",
             },
             {
-                src: "/favicon-512x512.png",
+                src: `${process.env.NEXT_PUBLIC_BASE_PATH}/favicon-512x512.png`,
                 sizes: "512x512",
                 type: "image/png",
                 purpose: "any",

components/chat-example-panel.tsx

@@ -8,6 +8,7 @@ import {
     Terminal,
     Zap,
 } from "lucide-react"
+import { getAssetUrl } from "@/lib/base-path"
 
 interface ExampleCardProps {
     icon: React.ReactNode
@@ -74,7 +75,7 @@ export default function ExamplePanel({
         setInput("Replicate this flowchart.")
 
         try {
-            const response = await fetch("/example.png")
+            const response = await fetch(getAssetUrl("/example.png"))
             const blob = await response.blob()
             const file = new File([blob], "example.png", { type: "image/png" })
             setFiles([file])
@@ -87,7 +88,7 @@ export default function ExamplePanel({
         setInput("Replicate this in aws style")
 
         try {
-            const response = await fetch("/architecture.png")
+            const response = await fetch(getAssetUrl("/architecture.png"))
             const blob = await response.blob()
             const file = new File([blob], "architecture.png", {
                 type: "image/png",
@@ -102,7 +103,7 @@ export default function ExamplePanel({
         setInput("Summarize this paper as a diagram")
 
         try {
-            const response = await fetch("/chain-of-thought.txt")
+            const response = await fetch(getAssetUrl("/chain-of-thought.txt"))
             const blob = await response.blob()
             const file = new File([blob], "chain-of-thought.txt", {
                 type: "text/plain",

components/chat-message-display.tsx

@@ -27,6 +27,7 @@ import {
     ReasoningTrigger,
 } from "@/components/ai-elements/reasoning"
 import { ScrollArea } from "@/components/ui/scroll-area"
+import { getApiEndpoint } from "@/lib/base-path"
 import {
     applyDiagramOperations,
     convertToLegalXml,
@@ -291,7 +292,7 @@ export function ChatMessageDisplay({
         setFeedback((prev) => ({ ...prev, [messageId]: value }))
 
         try {
-            await fetch("/api/log-feedback", {
+            await fetch(getApiEndpoint("/api/log-feedback"), {
                 method: "POST",
                 headers: { "Content-Type": "application/json" },
                 body: JSON.stringify({

components/chat-panel.tsx

@@ -22,6 +22,7 @@ import { ResetWarningModal } from "@/components/reset-warning-modal"
 import { SettingsDialog } from "@/components/settings-dialog"
 import { useDiagram } from "@/contexts/diagram-context"
 import { getAIConfig } from "@/lib/ai-config"
+import { getApiEndpoint } from "@/lib/base-path"
 import { findCachedResponse } from "@/lib/cached-responses"
 import { isPdfFile, isTextFile } from "@/lib/pdf-utils"
 import { type FileData, useFileProcessor } from "@/lib/use-file-processor"
@@ -160,7 +161,7 @@ export default function ChatPanel({
 
     // Check config on mount
     useEffect(() => {
-        fetch("/api/config")
+        fetch(getApiEndpoint("/api/config"))
             .then((res) => res.json())
             .then((data) => {
                 setAccessCodeRequired(data.accessCodeRequired)
@@ -232,7 +233,7 @@ export default function ChatPanel({
         setMessages,
     } = useChat({
         transport: new DefaultChatTransport({
-            api: "/api/chat",
+            api: getApiEndpoint("/api/chat"),
         }),
         async onToolCall({ toolCall }) {
             if (DEBUG) {

components/settings-dialog.tsx

@@ -20,6 +20,7 @@ import {
     SelectValue,
 } from "@/components/ui/select"
 import { Switch } from "@/components/ui/switch"
+import { getApiEndpoint } from "@/lib/base-path"
 
 interface SettingsDialogProps {
     open: boolean
@@ -71,7 +72,7 @@ export function SettingsDialog({
         // Only fetch if not cached in localStorage
         if (getStoredAccessCodeRequired() !== null) return
 
-        fetch("/api/config")
+        fetch(getApiEndpoint("/api/config"))
             .then((res) => {
                 if (!res.ok) throw new Error(`HTTP ${res.status}`)
                 return res.json()
@@ -119,12 +120,15 @@ export function SettingsDialog({
         setIsVerifying(true)
 
         try {
-            const response = await fetch("/api/verify-access-code", {
-                method: "POST",
-                headers: {
-                    "x-access-code": accessCode.trim(),
+            const response = await fetch(
+                getApiEndpoint("/api/verify-access-code"),
+                {
+                    method: "POST",
+                    headers: {
+                        "x-access-code": accessCode.trim(),
+                    },
                 },
-            })
+            )
 
             const data = await response.json()
 

contexts/diagram-context.tsx

@@ -5,6 +5,7 @@ import { createContext, useContext, useEffect, useRef, useState } from "react"
 import type { DrawIoEmbedRef } from "react-drawio"
 import { STORAGE_DIAGRAM_XML_KEY } from "@/components/chat-panel"
 import type { ExportFormat } from "@/components/save-dialog"
+import { getApiEndpoint } from "@/lib/base-path"
 import { extractDiagramXML, validateAndFixXml } from "../lib/utils"
 
 interface DiagramContextType {
@@ -329,7 +330,7 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         sessionId?: string,
     ) => {
         try {
-            await fetch("/api/log-save", {
+            await fetch(getApiEndpoint("/api/log-save"), {
                 method: "POST",
                 headers: { "Content-Type": "application/json" },
                 body: JSON.stringify({ filename, format, sessionId }),

docker-compose.yml

@@ -7,6 +7,11 @@ services:
       context: .
       args:
         - NEXT_PUBLIC_DRAWIO_BASE_URL=http://localhost:8080
+        # Uncomment below for subdirectory deployment
+        # - NEXT_PUBLIC_BASE_PATH=/nextaidrawio
     ports: ["3000:3000"]
     env_file: .env
+    environment:
+      # For subdirectory deployment, uncomment and set your path:
+      # NEXT_PUBLIC_BASE_PATH: /nextaidrawio
     depends_on: [drawio]

env.example

@@ -93,6 +93,12 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # NEXT_PUBLIC_DRAWIO_BASE_URL=https://embed.diagrams.net  # Default: https://embed.diagrams.net
 # Use this to point to a self-hosted draw.io instance
 
+# Subdirectory Deployment (Optional)
+# For deploying to a subdirectory (e.g., https://example.com/nextaidrawio)
+# Set this to your subdirectory path with leading slash (e.g., /nextaidrawio)
+# Leave empty for root deployment (default)
+# NEXT_PUBLIC_BASE_PATH=/nextaidrawio
+
 # PDF Input Feature (Optional)
 # Enable PDF file upload to extract text and generate diagrams
 # Enabled by default. Set to "false" to disable.

lib/base-path.ts

@@ -0,0 +1,33 @@
+/**
+ * Get the base path for API calls and static assets
+ * This is used for subdirectory deployment support
+ *
+ * Example: If deployed at https://example.com/nextaidrawio, this returns "/nextaidrawio"
+ * For root deployment, this returns ""
+ *
+ * Set NEXT_PUBLIC_BASE_PATH environment variable to your subdirectory path (e.g., /nextaidrawio)
+ */
+export function getBasePath(): string {
+    // Read from environment variable (must start with NEXT_PUBLIC_ to be available on client)
+    return process.env.NEXT_PUBLIC_BASE_PATH || ""
+}
+
+/**
+ * Get full API endpoint URL
+ * @param endpoint - API endpoint path (e.g., "/api/chat", "/api/config")
+ * @returns Full API path with base path prefix
+ */
+export function getApiEndpoint(endpoint: string): string {
+    const basePath = getBasePath()
+    return `${basePath}${endpoint}`
+}
+
+/**
+ * Get full static asset URL
+ * @param assetPath - Asset path (e.g., "/example.png", "/chain-of-thought.txt")
+ * @returns Full asset path with base path prefix
+ */
+export function getAssetUrl(assetPath: string): string {
+    const basePath = getBasePath()
+    return `${basePath}${assetPath}`
+}

next.config.ts

@@ -3,6 +3,9 @@ import type { NextConfig } from "next"
 const nextConfig: NextConfig = {
     /* config options here */
     output: "standalone",
+    // Support for subdirectory deployment (e.g., https://example.com/nextaidrawio)
+    // Set NEXT_PUBLIC_BASE_PATH environment variable to your subdirectory path (e.g., /nextaidrawio)
+    basePath: process.env.NEXT_PUBLIC_BASE_PATH || "",
 }
 
 export default nextConfig