diff --git a/demo/client/package.json b/demo/client/package.json
index a8b7a9c0..2131b2bf 100644
--- a/demo/client/package.json
+++ b/demo/client/package.json
@@ -10,6 +10,7 @@
   "license": "MIT OR Apache-2.0",
   "dependencies": {
     "@types/node": "^8.0.19",
+    "base64-js": "^1.2.1",
     "bootstrap": "^4.0.0-alpha.6",
     "opentype.js": "^0.7.3",
     "ts-loader": "^2.3.2",
diff --git a/demo/client/src/index.ts b/demo/client/src/index.ts
index 22f54490..0bded376 100644
--- a/demo/client/src/index.ts
+++ b/demo/client/src/index.ts
@@ -1,11 +1,30 @@
 // pathfinder/demo/src/index.ts
 
+const base64js = require('base64-js');
 const opentype = require('opentype.js');
 
-class AppController {
-    constructor() {
+const TEXT: string = "A";
+const FONT_SIZE: number = 16.0;
+
+const PARTITION_FONT_ENDPOINT_URL: string = "/partition-font";
+
+class PathfinderMeshes {
+    constructor(encodedResponse: string) {
+        const response = JSON.parse(encodedResponse);
+        if (!('Ok' in response))
+            throw new Error("Failed to partition the font!");
+        const meshes = response.Ok;
+        this.bQuads = base64js.toByteArray(meshes.bQuads);
+        this.bVertices = base64js.toByteArray(meshes.bVertices);
     }
 
+    bQuads: ArrayBuffer;
+    bVertices: ArrayBuffer;
+}
+
+class AppController {
+    constructor() {}
+
     start() {
         this.view = new PathfinderView(document.getElementById('pf-canvas') as HTMLCanvasElement);
 
@@ -15,16 +34,49 @@ class AppController {
 
     loadFont() {
         const file = this.loadFontButton.files[0];
-        const fileURL = window.URL.createObjectURL(file);
-        opentype.load(fileURL, (err, font) => this.fontLoaded(font));
+        const reader = new FileReader;
+        reader.addEventListener('loadend', () => {
+            this.fontData = reader.result;
+            this.fontLoaded();
+        }, false);
+        reader.readAsArrayBuffer(file);
     }
 
-    fontLoaded(font) {
+    fontLoaded() {
+        this.font = opentype.parse(this.fontData);
+        if (!this.font.supported) {
+            window.alert("The font type is unsupported.");
+            return;
+        }
+
+        const glyphIDs = this.font.stringToGlyphs(TEXT).map(glyph => glyph.index);
+
+        const request = {
+            otf: base64js.fromByteArray(new Uint8Array(this.fontData)),
+            fontIndex: 0,
+            glyphIDs: glyphIDs,
+            pointSize: FONT_SIZE,
+        };
+
+        const xhr = new XMLHttpRequest();
+        xhr.addEventListener('load', () => {
+            this.meshes = new PathfinderMeshes(xhr.responseText);
+            this.meshesReceived();
+        }, false);
+        xhr.open('POST', PARTITION_FONT_ENDPOINT_URL, true);
+        xhr.setRequestHeader('Content-Type', 'application/json');
+        xhr.send(JSON.stringify(request));
+    }
+
+    meshesReceived() {
         // TODO(pcwalton)
     }
 
     view: PathfinderView;
     loadFontButton: HTMLInputElement;
+    fontData: ArrayBuffer;
+    font: any;
+    meshes: PathfinderMeshes;
 }
 
 class PathfinderView {
diff --git a/demo/server/src/main.rs b/demo/server/src/main.rs
index 4d57c348..8c899bc4 100644
--- a/demo/server/src/main.rs
+++ b/demo/server/src/main.rs
@@ -52,13 +52,14 @@ impl IndexRange {
     }
 }
 
+#[allow(non_snake_case)]
 #[derive(Clone, Serialize, Deserialize)]
 struct PartitionFontRequest {
     // Base64 encoded.
     otf: String,
-    font_index: u32,
-    glyph_ids: Vec<u32>,
-    point_size: f64,
+    fontIndex: u32,
+    glyphIDs: Vec<u32>,
+    pointSize: f64,
 }
 
 #[derive(Clone, Copy, Serialize, Deserialize)]
@@ -83,13 +84,14 @@ struct PartitionGlyphInfo {
     b_vertex_indices: IndexRange,
 }
 
+#[allow(non_snake_case)]
 #[derive(Clone, Serialize, Deserialize)]
 struct PartitionFontResponse {
-    glyph_info: Vec<PartitionGlyphInfo>,
+    glyphInfo: Vec<PartitionGlyphInfo>,
     // Base64-encoded `bincode`-encoded `BQuad`s.
-    b_quads: String,
+    bQuads: String,
     // Base64-encoded `bincode`-encoded `BVertex`es.
-    b_vertices: String,
+    bVertices: String,
 }
 
 #[derive(Clone, Copy, Serialize, Deserialize)]
@@ -119,16 +121,16 @@ fn partition_font(request: Json<PartitionFontRequest>)
     let font_key = FontKey::new();
     let font_instance_key = FontInstanceKey {
         font_key: font_key,
-        size: Au::from_f64_px(request.point_size),
+        size: Au::from_f64_px(request.pointSize),
     };
     let mut font_context = FontContext::new();
-    if font_context.add_font_from_memory(&font_key, otf_data, request.font_index).is_err() {
+    if font_context.add_font_from_memory(&font_key, otf_data, request.fontIndex).is_err() {
         return Json(Err(PartitionFontError::FontLoadingFailed))
     }
 
     // Read glyph info.
     let mut outline_buffer = GlyphOutlineBuffer::new();
-    let decoded_outline_indices: Vec<_> = request.glyph_ids.iter().map(|&glyph_id| {
+    let decoded_outline_indices: Vec<_> = request.glyphIDs.iter().map(|&glyph_id| {
         let glyph_key = GlyphKey::new(glyph_id);
 
         let first_endpoint_index = outline_buffer.endpoints.len();
@@ -159,7 +161,7 @@ fn partition_font(request: Json<PartitionFontRequest>)
                      &outline_buffer.subpaths);
     let mut glyph_info = vec![];
     for (path_index, (&glyph_id, decoded_outline_indices)) in
-            request.glyph_ids.iter().zip(decoded_outline_indices.iter()).enumerate() {
+            request.glyphIDs.iter().zip(decoded_outline_indices.iter()).enumerate() {
         let glyph_key = GlyphKey::new(glyph_id);
 
         let dimensions = match font_context.glyph_dimensions(&font_instance_key, &glyph_key) {
@@ -212,9 +214,9 @@ fn partition_font(request: Json<PartitionFontRequest>)
 
     // Return the response.
     Json(Ok(PartitionFontResponse {
-        glyph_info: glyph_info,
-        b_quads: base64::encode(&b_quads),
-        b_vertices: base64::encode(&b_vertices),
+        glyphInfo: glyph_info,
+        bQuads: base64::encode(&b_quads),
+        bVertices: base64::encode(&b_vertices),
     }))
 }