[GH-ISSUE #15294] issue: SyntaxError: The string did not match the expected pattern #33052

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GiteaMirror · 2026-04-25T06:54:46-05:00

GiteaMirror commented

2026-04-25 06:54:46 -05:00

Originally created by @bharath21mob on GitHub (Jun 25, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/15294

Check Existing Issues

I have searched the existing issues and discussions.
I am using the latest version of Open WebUI.

Installation Method

Git Clone

Open WebUI Version

v0.6.15

Ollama Version (if applicable)

No response

Operating System

iOS

Browser (if applicable)

No response

Confirmation

I have read and followed all instructions in README.md.
I am using the latest version of both Open WebUI and Ollama.
I have included the browser console logs.
I have included the Docker container logs.
I have provided every relevant configuration, setting, and environment variable used in my setup.
I have clearly listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc).
I have documented step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation. My steps:
Start with the initial platform/version/OS and dependencies used,
Specify exact install/launch/configure commands,
List URLs visited, user input (incl. example values/emails/passwords if needed),
Describe all options and toggles enabled or changed,
Include any files or environmental changes,
Identify the expected and actual result at each stage,
Ensure any reasonably skilled user can follow and hit the same issue.

Expected Behavior

I am using Open-WebUI along with CapacitorJS to load the HTML pages statically and change the backend API. With this approach I am able to fetch chats, model, do authentication etc.,

Now, when I send a message I should get a streamed response

Actual Behavior

I am not getting the streamed response. Instead I get the following error

SyntaxError: The string did not match the expected pattern

Steps to Reproduce

Clone open-webui repository.

Create a new directory for your project

mkdir openwebui-mobile
cd openwebui-mobile

Initialize a new npm project

npm init -y

Install Capacitor CLI

npm install -D @capacitor/cli @capacitor/core

Initialize Capacitor

npx cap init

capacitor.config.json

{ "appId": "com.yourcompany.openwebuimobile", "appName": "OpenWebUI Mobile", "webDir": "src", "server": { "androidScheme": "https" }, "plugins": { "SplashScreen": { "launchShowDuration": 2000, "backgroundColor": "#ffffff", "showSpinner": false } } }

Add iOS platform

npx cap add ios

Add Android platform

npx cap add android

Install additional plugins for better mobile experience

npm install @capacitor/app @capacitor/splash-screen @capacitor/status-bar

backend-config.js

`(function() {
const BACKEND_URL = 'https://opeai.bharath.xyz';
const WS_URL = 'wss://opeai.bharath.xyz';

// Only redirect API calls
const originalFetch = window.fetch;
window.fetch = function(url, options = {}) {
    if (typeof url === 'string' && url.startsWith('/')) {
        url = BACKEND_URL + url;
    }

    // Force credentials to 'omit' to work with wildcard CORS
    options = options || {};
    options.credentials = 'omit';
    return originalFetch(url, options);
};

// Fix WebSocket connections
const OriginalWebSocket = window.WebSocket;
window.WebSocket = function(url, protocols) {
    // Replace capacitor WebSocket URLs with backend URL
    if (typeof url === 'string') {
        if (url.includes('ws://capacitor') || url.includes('wss://capacitor')) {
            url = url.replace(/wss?:\/\/capacitor/, WS_URL);
        } else if (url.startsWith('/')) {
            url = WS_URL + url;
        }
    }
    
    console.log('WebSocket connecting to:', url);
    return new OriginalWebSocket(url, protocols);
};

// Preserve WebSocket static properties
Object.setPrototypeOf(window.WebSocket, OriginalWebSocket);
window.WebSocket.prototype = OriginalWebSocket.prototype;
window.WebSocket.CONNECTING = 0;
window.WebSocket.OPEN = 1;
window.WebSocket.CLOSING = 2;
window.WebSocket.CLOSED = 3;

})();`

Logs & Screenshots

Additional Information

No response

Originally created by @bharath21mob on GitHub (Jun 25, 2025). Original GitHub issue: https://github.com/open-webui/open-webui/issues/15294 ### Check Existing Issues - [x] I have searched the existing issues and discussions. - [x] I am using the latest version of Open WebUI. ### Installation Method Git Clone ### Open WebUI Version v0.6.15 ### Ollama Version (if applicable) _No response_ ### Operating System iOS ### Browser (if applicable) _No response_ ### Confirmation - [x] I have read and followed all instructions in `README.md`. - [x] I am using the latest version of **both** Open WebUI and Ollama. - [x] I have included the browser console logs. - [x] I have included the Docker container logs. - [x] I have **provided every relevant configuration, setting, and environment variable used in my setup.** - [x] I have clearly **listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup** (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc). - [x] I have documented **step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation**. My steps: - Start with the initial platform/version/OS and dependencies used, - Specify exact install/launch/configure commands, - List URLs visited, user input (incl. example values/emails/passwords if needed), - Describe all options and toggles enabled or changed, - Include any files or environmental changes, - Identify the expected and actual result at each stage, - Ensure any reasonably skilled user can follow and hit the same issue. ### Expected Behavior I am using Open-WebUI along with CapacitorJS to load the HTML pages statically and change the backend API. With this approach I am able to fetch chats, model, do authentication etc., Now, when I send a message I should get a streamed response ### Actual Behavior I am not getting the streamed response. Instead I get the following error `SyntaxError: The string did not match the expected pattern` ### Steps to Reproduce 1. Clone open-webui repository. 2. ### Create a new directory for your project mkdir openwebui-mobile cd openwebui-mobile ### Initialize a new npm project npm init -y ### Install Capacitor CLI npm install -D @capacitor/cli @capacitor/core ### Initialize Capacitor npx cap init 3. capacitor.config.json `{ "appId": "com.yourcompany.openwebuimobile", "appName": "OpenWebUI Mobile", "webDir": "src", "server": { "androidScheme": "https" }, "plugins": { "SplashScreen": { "launchShowDuration": 2000, "backgroundColor": "#ffffff", "showSpinner": false } } }` 4. ### Add iOS platform npx cap add ios ### Add Android platform npx cap add android ### Install additional plugins for better mobile experience npm install @capacitor/app @capacitor/splash-screen @capacitor/status-bar 5. backend-config.js `(function() { const BACKEND_URL = 'https://opeai.bharath.xyz'; const WS_URL = 'wss://opeai.bharath.xyz'; // Only redirect API calls const originalFetch = window.fetch; window.fetch = function(url, options = {}) { if (typeof url === 'string' && url.startsWith('/')) { url = BACKEND_URL + url; } // Force credentials to 'omit' to work with wildcard CORS options = options || {}; options.credentials = 'omit'; return originalFetch(url, options); }; // Fix WebSocket connections const OriginalWebSocket = window.WebSocket; window.WebSocket = function(url, protocols) { // Replace capacitor WebSocket URLs with backend URL if (typeof url === 'string') { if (url.includes('ws://capacitor') || url.includes('wss://capacitor')) { url = url.replace(/wss?:\/\/capacitor/, WS_URL); } else if (url.startsWith('/')) { url = WS_URL + url; } } console.log('WebSocket connecting to:', url); return new OriginalWebSocket(url, protocols); }; // Preserve WebSocket static properties Object.setPrototypeOf(window.WebSocket, OriginalWebSocket); window.WebSocket.prototype = OriginalWebSocket.prototype; window.WebSocket.CONNECTING = 0; window.WebSocket.OPEN = 1; window.WebSocket.CLOSING = 2; window.WebSocket.CLOSED = 3; })();` ### Logs & Screenshots ![Image](https://github.com/user-attachments/assets/c8af4b73-2ef4-4ea0-b91a-cffeb1e1473f) ### Additional Information _No response_

GiteaMirror added the bug label 2026-04-25 06:54:46 -05:00

GiteaMirror closed this issue

2026-04-25 06:54:46 -05:00

GiteaMirror commented

2026-04-25 06:54:47 -05:00

@tjbck commented on GitHub (Jun 25, 2025):

Outside of the scope.

@tjbck commented on GitHub (Jun 25, 2025): Outside of the scope.

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Reference: github-starred/open-webui#33052