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feat(ui): path prefix support via HTTP header (#4497)

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Makes the web app honour the `X-Forwarded-Prefix` HTTP request header that may be sent by a reverse-proxy in order to inform the app that its public routes contain a path prefix.
For instance this allows to serve the webapp via a reverse-proxy/ingress controller under a path prefix/sub path such as e.g. `/localai/` while still being able to use the regular LocalAI routes/paths without prefix when directly connecting to the LocalAI server.

Changes:
* Add new `StripPathPrefix` middleware to strip the path prefix (provided with the `X-Forwarded-Prefix` HTTP request header) from the request path prior to matching the HTTP route.
* Add a `BaseURL` utility function to build the base URL, honouring the `X-Forwarded-Prefix` HTTP request header.
* Generate the derived base URL into the HTML (`head.html` template) as `<base/>` tag.
* Make all webapp-internal URLs (within HTML+JS) relative in order to make the browser resolve them against the `<base/>` URL specified within each HTML page's header.
* Make font URLs within the CSS files relative to the CSS file.
* Generate redirect location URLs using the new `BaseURL` function.
* Use the new `BaseURL` function to generate absolute URLs within gallery JSON responses.

Closes #3095

TL;DR:
The header-based approach allows to move the path prefix configuration concern completely to the reverse-proxy/ingress as opposed to having to align the path prefix configuration between LocalAI, the reverse-proxy and potentially other internal LocalAI clients.
The gofiber swagger handler already supports path prefixes this way, see e2d9e9916d/swagger.go (L79)

Signed-off-by: Max Goltzsche <max.goltzsche@gmail.com>
This commit is contained in:
Max Goltzsche 2025-01-07 17:18:21 +01:00 • committed by GitHub
parent bf37eebecb
commit 8cc2d01caa
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37 changed files with 416 additions and 105 deletions
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10
core/http/static/assets/font1.css
View file

@ -7,33 +7,33 @@ https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Roboto:wg
font-style: normal;
font-weight: 400;
font-display: swap;
src: url(/static/assets/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfMZg.ttf) format('truetype');
src: url(./UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfMZg.ttf) format('truetype');
}
@font-face {
font-family: 'Inter';
font-style: normal;
font-weight: 600;
font-display: swap;
src: url(/static/assets/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuGKYMZg.ttf) format('truetype');
src: url(./UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuGKYMZg.ttf) format('truetype');
}
@font-face {
font-family: 'Inter';
font-style: normal;
font-weight: 700;
font-display: swap;
src: url(/static/assets/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuFuYMZg.ttf) format('truetype');
src: url(./UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuFuYMZg.ttf) format('truetype');
}
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-display: swap;
src: url(/static/assets/KFOmCnqEu92Fr1Me5Q.ttf) format('truetype');
src: url(./KFOmCnqEu92Fr1Me5Q.ttf) format('truetype');
}
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-display: swap;
src: url(/static/assets/KFOlCnqEu92Fr1MmEU9vAw.ttf) format('truetype');
src: url(./KFOlCnqEu92Fr1MmEU9vAw.ttf) format('truetype');
}

10
core/http/static/assets/font2.css
View file

@ -7,33 +7,33 @@ https://fonts.googleapis.com/css?family=Roboto:300,400,500,700,900&display=swap
font-style: normal;
font-weight: 300;
font-display: swap;
src: url(/static/assets//KFOlCnqEu92Fr1MmSU5fBBc9.ttf) format('truetype');
src: url(./KFOlCnqEu92Fr1MmSU5fBBc9.ttf) format('truetype');
}
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-display: swap;
src: url(/static/assets//KFOmCnqEu92Fr1Mu4mxP.ttf) format('truetype');
src: url(./KFOmCnqEu92Fr1Mu4mxP.ttf) format('truetype');
}
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 500;
font-display: swap;
src: url(/static/assets//KFOlCnqEu92Fr1MmEU9fBBc9.ttf) format('truetype');
src: url(./KFOlCnqEu92Fr1MmEU9fBBc9.ttf) format('truetype');
}
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 700;
font-display: swap;
src: url(/static/assets//KFOlCnqEu92Fr1MmWUlfBBc9.ttf) format('truetype');
src: url(./KFOlCnqEu92Fr1MmWUlfBBc9.ttf) format('truetype');
}
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 900;
font-display: swap;
src: url(/static/assets//KFOlCnqEu92Fr1MmYUtfBBc9.ttf) format('truetype');
src: url(./KFOlCnqEu92Fr1MmYUtfBBc9.ttf) format('truetype');
}

2
core/http/static/chat.js
View file

@ -143,7 +143,7 @@ function readInputImage() {
// }
// Source: https://stackoverflow.com/a/75751803/11386095
const response = await fetch("/v1/chat/completions", {
const response = await fetch("v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${key}`,

2
core/http/static/image.js
View file

@ -48,7 +48,7 @@ async function promptDallE(key, input) {
document.getElementById("input").disabled = true;
const model = document.getElementById("image-model").value;
const response = await fetch("/v1/images/generations", {
const response = await fetch("v1/images/generations", {
method: "POST",
headers: {
Authorization: `Bearer ${key}`,

6
core/http/static/talk.js
View file

@ -122,7 +122,7 @@ async function sendAudioToWhisper(audioBlob) {
formData.append('model', getWhisperModel());
API_KEY = localStorage.getItem("key");
const response = await fetch('/v1/audio/transcriptions', {
const response = await fetch('v1/audio/transcriptions', {
method: 'POST',
headers: {
'Authorization': `Bearer ${API_KEY}`
@ -139,7 +139,7 @@ async function sendTextToChatGPT(text) {
conversationHistory.push({ role: "user", content: text });
API_KEY = localStorage.getItem("key");
const response = await fetch('/v1/chat/completions', {
const response = await fetch('v1/chat/completions', {
method: 'POST',
headers: {
'Authorization': `Bearer ${API_KEY}`,
@ -163,7 +163,7 @@ async function sendTextToChatGPT(text) {
async function getTextToSpeechAudio(text) {
API_KEY = localStorage.getItem("key");
const response = await fetch('/v1/audio/speech', {
const response = await fetch('v1/audio/speech', {
method: 'POST',
headers: {

2
core/http/static/tts.js
View file

@ -19,7 +19,7 @@ async function tts(key, input) {
document.getElementById("input").disabled = true;
const model = document.getElementById("tts-model").value;
const response = await fetch("/tts", {
const response = await fetch("tts", {
method: "POST",
headers: {
Authorization: `Bearer ${key}`,