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fegger 9823761e03 Implement stream cancellation in OllamaClient 
Add `cancelStream` method to allow aborting active requests. Store the current `AbortController` on the client instance
and reset it when the stream completes or is cancelled. Update `ChatView` to call `cancelStream` on close.

Add comprehensive tests for stream cancellation scenarios, including aborting active requests, handling cancellation
when no stream is active, clearing the controller after normal completion, and allowing new streams after cancellation.
2026-05-07 12:11:01 +02:00

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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">export enum LogLevel {
DEBUG = 0,
INFO = 1,
WARN = 2,
ERROR = 3,
}
&nbsp;
const SEVERITY_ORDER: Record&lt;string, number&gt; = {
debug: LogLevel.DEBUG,
info: LogLevel.INFO,
warn: LogLevel.WARN,
error: LogLevel.ERROR,
};
&nbsp;
export class Logger {
private static minLevel: LogLevel = LogLevel.DEBUG;
&nbsp;
static setLevel(level: string | LogLevel): void {
if (typeof level === 'string') {
const lowerLevel = level.toLowerCase();
Logger.minLevel = SEVERITY_ORDER[lowerLevel] ?? LogLevel.DEBUG;
} else {
Logger.minLevel = level;
}
}
&nbsp;
static debug(message: string, category: string = <span class="branch-0 cbranch-no" title="branch not covered" >'general')</span>: void {
if (LogLevel.DEBUG &gt;= Logger.minLevel) {
console.debug(`[${category}] DEBUG: ${message}`);
}
}
&nbsp;
static info(message: string, category: string = <span class="branch-0 cbranch-no" title="branch not covered" >'general')</span>: void {
if (LogLevel.INFO &gt;= Logger.minLevel) {
console.info(`[${category}] INFO: ${message}`);
}
}
&nbsp;
static warn(message: string, category: string = <span class="branch-0 cbranch-no" title="branch not covered" >'general')</span>: void {
if (LogLevel.WARN &gt;= Logger.minLevel) {
console.warn(`[${category}] WARN: ${message}`);
}
}
&nbsp;
static error(message: string, category: string = <span class="branch-0 cbranch-no" title="branch not covered" >'general')</span>: void {
if (LogLevel.ERROR &gt;= Logger.minLevel) {
console.error(`[${category}] ERROR: ${message}`);
}
}
}
&nbsp;
// ==================== URL &amp; Model Validation ====================
&nbsp;
export function validateOllamaUrl(url: string): { valid: boolean; error?: string } {
if (typeof url !== 'string' || !url.trim()) {
return { valid: false, error: 'URL cannot be empty' };
}
&nbsp;
const trimmedUrl = url.trim();
&nbsp;
if (trimmedUrl.endsWith('/')) {
return { valid: false, error: 'URL should not end with a slash' };
}
&nbsp;
try {
const parsed = new URL(trimmedUrl);
<span class="missing-if-branch" title="if path not taken" >I</span>if (parsed.protocol !== 'http:' &amp;&amp; parsed.protocol !== 'https:') {
<span class="cstat-no" title="statement not covered" > return { valid: false, error: 'Must be a valid HTTP or HTTPS URL' };</span>
}
return { valid: true };
} catch {
return { valid: false, error: 'Must be a valid HTTP or HTTPS URL' };
}
}
&nbsp;
export function validateModelName(model: string): { valid: boolean; error?: string } {
if (typeof model !== 'string') {
return { valid: false, error: 'Model name must be a string' };
}
&nbsp;
const trimmedModel = model.trim();
&nbsp;
// Explicit check for empty string after trimming
if (!trimmedModel || trimmedModel.length === 0) {
return { valid: false, error: 'Model name cannot be empty' };
}
&nbsp;
if (trimmedModel.length &lt; 2) {
return { valid: false, error: 'Model name must be at least 2 characters long' };
}
&nbsp;
if (trimmedModel.length &gt; 100) {
return { valid: false, error: 'Model name must be less than 100 characters long' };
}
&nbsp;
if (!/^[a-zA-Z0-9._:-]+$/.test(trimmedModel)) {
return {
valid: false,
error: 'Model name can only contain letters, numbers, dots, dashes, underscores, and colons',
};
}
&nbsp;
return { valid: true };
}
&nbsp;
export function validatePluginSettings(settings: { ollamaUrl: string; model: string }): string[] {
const errors: string[] = [];
&nbsp;
const urlValidation = validateOllamaUrl(settings.ollamaUrl);
if (!urlValidation.valid) {
errors.push(`Invalid Ollama URL: ${urlValidation.error}`);
}
&nbsp;
const modelValidation = validateModelName(settings.model);
if (!modelValidation.valid) {
errors.push(`Invalid Model Name: ${modelValidation.error}`);
}
&nbsp;
return errors;
}
&nbsp;
// ==================== Safe JSON Parsing ====================
&nbsp;
const MAX_JSON_SIZE = 1_000_000;
const MAX_JSON_NESTING = 24;
&nbsp;
function countNestingDepth(value: unknown, depth: number = 0): number {
if (depth &gt; MAX_JSON_NESTING) {
return depth;
}
<span class="missing-if-branch" title="if path not taken" >I</span>if (Array.isArray(value)) {
<span class="cstat-no" title="statement not covered" > return Math.max(...value.map(<span class="fstat-no" title="function not covered" >(i</span>tem) =&gt; <span class="cstat-no" title="statement not covered" >countNestingDepth(item, depth + 1))</span>, depth);</span>
}
if (value !== null &amp;&amp; typeof value === 'object') {
const entries = Object.values(value as Record&lt;string, unknown&gt;);
if (entries.length === 0) return depth;
return Math.max(...entries.map((item) =&gt; countNestingDepth(item, depth + 1)), depth);
}
return depth;
}
&nbsp;
export function safeParseJson(jsonString: string): unknown {
if (typeof jsonString !== 'string') {
throw new Error('Input must be a string');
}
&nbsp;
if (jsonString.length &gt; MAX_JSON_SIZE) {
throw new Error('JSON input too large');
}
&nbsp;
let parsed: unknown;
try {
parsed = JSON.parse(jsonString);
} catch {
throw new Error('Invalid JSON');
}
&nbsp;
// Check for dangerous prototype pollution patterns in object keys only
const checkDangerousPatterns = (obj: unknown): boolean =&gt; {
if (typeof obj !== 'object' || obj === null) {
return false;
}
&nbsp;
const dangerousKeys = ['constructor', 'prototype', '__proto__'];
if (dangerousKeys.some((key) =&gt; Object.keys(obj).includes(key))) {
return true;
}
&nbsp;
// Recursively check nested objects
for (const key in obj as Record&lt;string, unknown&gt;) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (checkDangerousPatterns((obj as Record&lt;string, unknown&gt;)[key])) {
<span class="cstat-no" title="statement not covered" > return true;</span>
}
}
&nbsp;
return false;
};
&nbsp;
if (checkDangerousPatterns(parsed)) {
throw new Error('dangerous code pattern detected');
}
&nbsp;
// Check nesting depth
if (countNestingDepth(parsed) &gt; MAX_JSON_NESTING) {
throw new Error('JSON nesting too deep');
}
&nbsp;
return parsed;
}
&nbsp;
// ==================== Markdown Utilities ====================
&nbsp;</pre></td></tr></table></pre>
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