mirror of
https://github.com/ggerganov/llama.cpp.git
synced 2025-01-03 17:51:09 +01:00
expose simple web interface on root domain
demonstrates how to use the stream option of generate.
This commit is contained in:
tobi lutke
Tobias Lütke
parent
acc111caf9
commit
627d3ba8b5
@ -889,7 +889,14 @@ int main(int argc, char ** argv) {
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});
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svr.Get("/", [](const Request &, Response & res) {
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res.set_content("<h1>llama.cpp server works</h1>", "text/html");
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// return content of server.html file
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std::ifstream t("examples/server/server.html");
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std::stringstream buffer;
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buffer << t.rdbuf();
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res.set_content(buffer.str(), "text/html");
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return false;
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});
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svr.Post("/completion", [&llama](const Request & req, Response & res) {
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287
examples/server/server.html
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287
examples/server/server.html
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@ -0,0 +1,287 @@
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<html>
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<head>
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<title>Llama.cpp</title>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>llama.cpp - chat</title>
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<style>
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#container {
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max-width: 80rem;
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margin: 10em auto;
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}
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main {
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border: 1px solid #ddd;
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padding: 1em;
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}
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#chat {
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height: 50vh;
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overflow-y: auto;
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}
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body {
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max-width: 650px;
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line-height: 1.2;
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font-size: 16px;
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margin: 0 auto;
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}
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p {
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overflow-wrap: break-word;
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word-wrap: break-word;
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hyphens: auto;
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text-align: justify;
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margin-top: 0.5em;
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margin-bottom: 0.5em;
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}
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form {
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margin: 1em 0;
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display: flex;
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gap: 0.5em;
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flex-direction: row;
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align-items: center;
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}
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form>* {
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padding: 4px;
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}
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form input {
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flex-grow: 1;
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}
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fieldset {
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width: 100%;
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padding: 1em;
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}
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fieldset label {
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margin: 0.5em 0;
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display: block;
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}
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</style>
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<script type="module">
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import { fetchEventSource } from "https://esm.sh/@microsoft/fetch-event-source"
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import {
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html, h, signal, effect, computed, render, useSignal, useEffect, useRef
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} from 'https://npm.reversehttp.com/@preact/signals-core,@preact/signals,htm/preact,preact,preact/hooks';
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const transcript = signal([])
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const chatStarted = computed(() => transcript.value.length > 0)
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const chatTemplate = signal("{{prompt}}\n\n{{history}}\n{{bot}}:")
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const settings = signal({
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prompt: "This is a conversation between user and llama, a friendly chatbot.",
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bot: "llama",
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user: "User"
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})
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const temperature = signal(0.2)
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const nPredict = signal(80)
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let controller;
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// simple template replace
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const template = (str, map) => {
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let params = settings.value;
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if (map) {
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params = { ...params, ...map };
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}
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const result = String(str).replaceAll(/\{\{(.*?)\}\}/g, (_, key) => template(params[key]));
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console.log("template", str, params, "=>", result);
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return result;
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}
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// send message to server
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const chat = async (msg) => {
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if (controller) {
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console.log('already running...');
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return;
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}
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controller = new AbortController();
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const history = [...transcript.value, ['{{user}}', msg]];
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transcript.value = history;
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let additionalParams = {
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history: history.flatMap(([name, msg]) => `${name}: ${msg}`).join("\n"),
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}
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const payload = template(chatTemplate.value, additionalParams)
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console.log("payload", payload)
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let currentMessage = "";
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await fetchEventSource('/completion', {
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method: 'POST',
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signal: controller.signal,
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body: JSON.stringify({
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stream: true,
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prompt: payload,
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n_predict: parseInt(nPredict.value),
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temperature: parseFloat(temperature.value),
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stop: ["</s>", template("{{bot}}"), template("{{user}}")]
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}),
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onmessage(e) {
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const data = JSON.parse(e.data);
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currentMessage += data.content;
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if (data.stop) {
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console.log("done:", data);
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}
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transcript.value = [...history, ['{{bot}}', currentMessage]]
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return true;
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},
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});
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console.log("transcript", transcript.value);
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controller = null;
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}
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function MessageInput() {
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const message = useSignal("")
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const stop = (e) => {
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e.preventDefault();
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if (controller) {
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controller.abort();
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controller = null;
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}
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}
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const reset = (e) => {
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stop(e);
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transcript.value = [];
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}
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const submit = (e) => {
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stop(e);
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chat(message.value);
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message.value = "";
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}
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return html`
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<form onsubmit=${submit}>
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<input type="text" value="${message.value}" oninput=${(e) => message.value = e.target.value} autofocus placeholder="start chat here..."/>
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<button type="submit">Send</button>
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<button onclick=${(e) => stop(e)}>Stop</button>
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<button onclick=${(e) => reset(e)}>Reset</button>
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</form>
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`
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}
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const ChatLog = (props) => {
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const messages = transcript.value;
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const container = useRef(null)
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useEffect(() => {
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// scroll to bottom (if needed)
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if (container.current && container.current.scrollHeight <= container.current.scrollTop + container.current.offsetHeight + 100) {
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container.current.scrollTo(0, container.current.scrollHeight)
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}
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}, [messages])
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const chatLine = ([user, msg]) => {
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return html`<p><strong>${template(user, {})}:</strong> ${template(msg, {})}</p>`
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};
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return html`
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<section id="chat" ref=${container}>
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${messages.flatMap((m) => chatLine(m))}
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</section>`;
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};
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const ConfigForm = (props) => {
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return html`
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<form>
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<fieldset>
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<legend>Settings</legend>
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<div>
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<label for="prompt">Prompt</label>
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<textarea type="text" id="prompt" value="${settings.value.prompt}" oninput=${(e) => settings.value.prompt = e.target.value} rows="3" cols="60" />
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</div>
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<div>
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<label for="user">User name</label>
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<input type="text" id="user" value="${settings.value.user}" oninput=${(e) => settings.value.user = e.target.value} />
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</div>
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<div>
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<label for="bot">Bot name</label>
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<input type="text" id="bot" value="${settings.value.bot}" oninput=${(e) => settings.value.bot = e.target.value} />
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</div>
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<div>
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<label for="template">Prompt template</label>
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<textarea id="template" value="${chatTemplate}" oninput=${(e) => chatTemplate.value = e.target.value} rows="8" cols="60" />
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</div>
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<div>
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<label for="temperature">Temperature</label>
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<input type="range" id="temperature" min="0.0" max="1.0" step="0.01" value="${temperature.value}" oninput=${(e) => temperature.value = e.target.value} />
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<span>${temperature}</span>
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</div>
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<div>
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<label for="nPredict">Predictions</label>
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<input type="range" id="nPredict" min="1" max="2048" step="1" value="${nPredict.value}" oninput=${(e) => nPredict.value = e.target.value} />
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<span>${nPredict}</span>
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</div>
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</fieldset>
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</form>
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`
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}
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function App(props) {
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return html`
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<div id="container">
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<header>
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<h1>llama.cpp</h1>
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</header>
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<main>
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<section class="chat">
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<${chatStarted.value ? ChatLog : ConfigForm
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} />
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</section >
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<section class="chat">
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<${MessageInput} />
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</section>
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</main >
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<footer>
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<p>Powered by <a href="https://github.com/ggerganov/llama.cpp">llama.cpp</a> and <a href="https://ggml.ai">ggml.ai</a></p>
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</footer>
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</div>
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`;
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}
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render(h(App), document.body);
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</script>
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</head>
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<body>
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</body>
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</html>
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