docs: how to use legacy ui

Author: ngxson

examples/server/README.md

@@ -929,6 +929,16 @@ Apart from error types supported by OAI, we also have custom types that are spec
 }
 ```
 
+### Legacy completion web UI
+
+A new chat-based UI has replaced the old completion-based since [this PR](https://github.com/ggerganov/llama.cpp/pull/10175). If you want to use the old completion, start the server with `--path ./examples/server/public_legacy`
+
+For example:
+
+```sh
+./llama-server -m my_model.gguf -c 8192 --path ./examples/server/public_legacy
+```
+
 ### Extending or building alternative Web Front End
 
 You can extend the front end by running the server binary with `--path` set to `./your-directory` and importing `/completion.js` to get access to the llamaComplete() method.

examples/server/public/index.html

@@ -25,6 +25,7 @@
     .btn-mini {
       @apply cursor-pointer opacity-0 group-hover:opacity-100 hover:shadow-md;
     }
+    .chat-screen { max-width: 900px; }
   </style>
 </head>
 
@@ -52,7 +53,7 @@ <h2 class="font-bold mb-4 ml-4">Conversations</h2>
       </div>
     </div>
 
-    <div class="flex flex-col w-screen h-screen max-w-screen-md px-8 mx-auto">
+    <div class="chat-screen flex flex-col w-screen h-screen px-8 mx-auto">
       <!-- header -->
       <div class="flex flex-row items-center">
         <div class="grow text-2xl font-bold mt-8 mb-6">

examples/server/server.cpp

@@ -3112,14 +3112,11 @@ int main(int argc, char ** argv) {
     // register static assets routes
     if (!params.public_path.empty()) {
         // Set the base directory for serving static files
-        svr->set_base_dir(params.public_path);
-    }
-
-    if (!params.api_keys.empty()) {
-        // for now, if API key is set, web UI is unusable
-        svr->Get("/", [&](const httplib::Request &, httplib::Response & res) {
-            return res.set_content("Web UI is disabled because API key is set.", "text/html; charset=utf-8");
-        });
+        bool is_found = svr->set_mount_point("/", params.public_path);
+        if (!is_found) {
+            LOG_ERR("%s: static assets path not found: %s\n", __func__, params.public_path.c_str());
+            return 1;
+        }
     } else {
         // using embedded static files
         svr->Get("/",                        handle_static_file(index_html, index_html_len, "text/html; charset=utf-8"));