Use vite's development proxy for api-override

webapp/vite.config.mjs

@@ -4,58 +4,79 @@
 // Note: Comments are generated to explain relevant configuration options.
 
 import { fileURLToPath, URL } from "node:url";
-import { defineConfig } from "vite";
+import { defineConfig, loadEnv } from "vite";
 import vue from "@vitejs/plugin-vue";
 
 // https://vitejs.dev/config/
-export default defineConfig({
-  plugins: [vue()],
+export default defineConfig(({ command, mode }) => {
+  const env = loadEnv(mode, process.cwd(), "");
 
-  build: {
-    // Output directory for production builds
-    outDir: "../src/openflexure_microscope_server/static",
-    // Clear output directory before build
-    emptyOutDir: true,
-    chunkSizeWarningLimit: 400,
-    rollupOptions: {
-      output: {
-        manualChunks: {
-          "vue-vendor": ["vue", "pinia", "pinia-plugin-persistedstate"],
-          openseadragon: ["openseadragon"],
-          uikit: ["uikit"],
-          utils: ["axios", "mitt", "mousetrap", "@vueuse/core"],
+  var target;
+
+  if (command === "serve") {
+    if (env.VITE_API_TARGET === "local") {
+      target = "http://localhost:5000";
+    } else if (env.VITE_API_TARGET === "microscope") {
+      target = env.VITE_MICROSCPOPE_HOST || "http://microscope.local:5000";
+    } else {
+      throw new Error(`Invalid VITE_API_TARGET: ${env.VITE_API_TARGET}`);
+    }
+    console.log(`Proxying /api → ${target}`);
+  }
+
+  return {
+    plugins: [vue()],
+
+    build: {
+      // Output directory for production builds
+      outDir: "../src/openflexure_microscope_server/static",
+      // Clear output directory before build
+      emptyOutDir: true,
+      chunkSizeWarningLimit: 400,
+      rollupOptions: {
+        output: {
+          manualChunks: {
+            "vue-vendor": ["vue", "pinia", "pinia-plugin-persistedstate"],
+            openseadragon: ["openseadragon"],
+            uikit: ["uikit"],
+            utils: ["axios", "mitt", "mousetrap", "@vueuse/core"],
+          },
         },
       },
     },
-  },
 
-  resolve: {
-    alias: {
-      // Setup path alias for src directory.
-      // This allows importing modules using '@/path/to/module'.
-      "@": fileURLToPath(new URL("./src", import.meta.url)),
+    resolve: {
+      alias: {
+        // Setup path alias for src directory.
+        // This allows importing modules using '@/path/to/module'.
+        "@": fileURLToPath(new URL("./src", import.meta.url)),
+      },
+      // Recognize these file extensions for module resolution.
+      extensions: [".mjs", ".js", ".ts", ".jsx", ".tsx", ".json", ".vue"],
     },
-    // Recognize these file extensions for module resolution.
-    extensions: [".mjs", ".js", ".ts", ".jsx", ".tsx", ".json", ".vue"],
-  },
-  server: {
-    host: true,
-    // Set the development server port to 8080.
-    // OFM uses port 5000, so we avoid conflicts. run, and override by using the address:
-    // http://microscope.local:8080/?overrideOrigin=http://microscope.local:5000/api/v3#
-    port: 8080,
-    strictPort: true,
-  },
-  css: {
-    preprocessorOptions: {
-      less: {
-        // Always include math in Less files.
-        math: "always",
-        // Enable relative URLs in Less files.
-        relativeUrls: true,
-        // Enable JavaScript in Less files
-        javascriptEnabled: true,
+    server: {
+      host: true,
+      // Set the development server port to 8080.
+      port: 8080,
+      strictPort: true,
+      proxy: {
+        "/api": {
+          target,
+          changeOrigin: true,
+        },
       },
     },
-  },
+    css: {
+      preprocessorOptions: {
+        less: {
+          // Always include math in Less files.
+          math: "always",
+          // Enable relative URLs in Less files.
+          relativeUrls: true,
+          // Enable JavaScript in Less files
+          javascriptEnabled: true,
+        },
+      },
+    },
+  };
 });