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This commit is contained in:
Juergen Kunz
2025-07-17 15:13:09 +00:00
parent a625675922
commit 82df9a6f52
9 changed files with 581 additions and 370 deletions
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145
ts/proxies/http-proxy/request-handler.ts
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@@ -10,7 +10,7 @@ import { ConnectionPool } from './connection-pool.js';
import { ContextCreator } from './context-creator.js';
import { HttpRequestHandler } from './http-request-handler.js';
import { Http2RequestHandler } from './http2-request-handler.js';
import type { IRouteConfig } from '../smart-proxy/models/route-types.js';
import type { IRouteConfig, IRouteTarget } from '../smart-proxy/models/route-types.js';
import type { IRouteContext, IHttpRouteContext } from '../../core/models/route-context.js';
import { toBaseContext } from '../../core/models/route-context.js';
import { TemplateUtils } from '../../core/utils/template-utils.js';
@@ -99,6 +99,80 @@ export class RequestHandler {
return { ...this.defaultHeaders };
}
/**
* Select the appropriate target from the targets array based on sub-matching criteria
*/
private selectTarget(
targets: IRouteTarget[],
context: {
port: number;
path?: string;
headers?: Record<string, string>;
method?: string;
}
): IRouteTarget | null {
// Sort targets by priority (higher first)
const sortedTargets = [...targets].sort((a, b) => (b.priority || 0) - (a.priority || 0));
// Find the first matching target
for (const target of sortedTargets) {
if (!target.match) {
// No match criteria means this is a default/fallback target
return target;
}
// Check port match
if (target.match.ports && !target.match.ports.includes(context.port)) {
continue;
}
// Check path match (supports wildcards)
if (target.match.path && context.path) {
const pathPattern = target.match.path.replace(/\*/g, '.*');
const pathRegex = new RegExp(`^${pathPattern}$`);
if (!pathRegex.test(context.path)) {
continue;
}
}
// Check method match
if (target.match.method && context.method && !target.match.method.includes(context.method)) {
continue;
}
// Check headers match
if (target.match.headers && context.headers) {
let headersMatch = true;
for (const [key, pattern] of Object.entries(target.match.headers)) {
const headerValue = context.headers[key.toLowerCase()];
if (!headerValue) {
headersMatch = false;
break;
}
if (pattern instanceof RegExp) {
if (!pattern.test(headerValue)) {
headersMatch = false;
break;
}
} else if (headerValue !== pattern) {
headersMatch = false;
break;
}
}
if (!headersMatch) {
continue;
}
}
// All criteria matched
return target;
}
// No matching target found, return the first target without match criteria (default)
return sortedTargets.find(t => !t.match) || null;
}
/**
* Apply CORS headers to response if configured
* Implements Phase 5.5: Context-aware CORS handling
@@ -480,17 +554,31 @@ export class RequestHandler {
}
}
// If we found a matching route with function-based targets, use it
if (matchingRoute && matchingRoute.action.type === 'forward' && matchingRoute.action.target) {
// If we found a matching route with forward action, select appropriate target
if (matchingRoute && matchingRoute.action.type === 'forward' && matchingRoute.action.targets && matchingRoute.action.targets.length > 0) {
this.logger.debug(`Found matching route: ${matchingRoute.name || 'unnamed'}`);
// Select the appropriate target from the targets array
const selectedTarget = this.selectTarget(matchingRoute.action.targets, {
port: routeContext.port,
path: routeContext.path,
headers: routeContext.headers,
method: routeContext.method
});
if (!selectedTarget) {
this.logger.error(`No matching target found for route ${matchingRoute.name}`);
req.socket.end();
return;
}
// Extract target information, resolving functions if needed
let targetHost: string | string[];
let targetPort: number;
try {
// Check function cache for host and resolve or use cached value
if (typeof matchingRoute.action.target.host === 'function') {
if (typeof selectedTarget.host === 'function') {
// Generate a function ID for caching (use route name or ID if available)
const functionId = `host-${matchingRoute.id || matchingRoute.name || 'unnamed'}`;
@@ -502,7 +590,7 @@ export class RequestHandler {
this.logger.debug(`Using cached host value for ${functionId}`);
} else {
// Resolve the function and cache the result
const resolvedHost = matchingRoute.action.target.host(toBaseContext(routeContext));
const resolvedHost = selectedTarget.host(toBaseContext(routeContext));
targetHost = resolvedHost;
// Cache the result
@@ -511,16 +599,16 @@ export class RequestHandler {
}
} else {
// No cache available, just resolve
const resolvedHost = matchingRoute.action.target.host(routeContext);
const resolvedHost = selectedTarget.host(routeContext);
targetHost = resolvedHost;
this.logger.debug(`Resolved function-based host to: ${Array.isArray(resolvedHost) ? resolvedHost.join(', ') : resolvedHost}`);
}
} else {
targetHost = matchingRoute.action.target.host;
targetHost = selectedTarget.host;
}
// Check function cache for port and resolve or use cached value
if (typeof matchingRoute.action.target.port === 'function') {
if (typeof selectedTarget.port === 'function') {
// Generate a function ID for caching
const functionId = `port-${matchingRoute.id || matchingRoute.name || 'unnamed'}`;
@@ -532,7 +620,7 @@ export class RequestHandler {
this.logger.debug(`Using cached port value for ${functionId}`);
} else {
// Resolve the function and cache the result
const resolvedPort = matchingRoute.action.target.port(toBaseContext(routeContext));
const resolvedPort = selectedTarget.port(toBaseContext(routeContext));
targetPort = resolvedPort;
// Cache the result
@@ -541,12 +629,12 @@ export class RequestHandler {
}
} else {
// No cache available, just resolve
const resolvedPort = matchingRoute.action.target.port(routeContext);
const resolvedPort = selectedTarget.port(routeContext);
targetPort = resolvedPort;
this.logger.debug(`Resolved function-based port to: ${resolvedPort}`);
}
} else {
targetPort = matchingRoute.action.target.port === 'preserve' ? routeContext.port : matchingRoute.action.target.port as number;
targetPort = selectedTarget.port === 'preserve' ? routeContext.port : selectedTarget.port as number;
}
// Select a single host if an array was provided
@@ -626,17 +714,32 @@ export class RequestHandler {
}
}
// If we found a matching route with function-based targets, use it
if (matchingRoute && matchingRoute.action.type === 'forward' && matchingRoute.action.target) {
// If we found a matching route with forward action, select appropriate target
if (matchingRoute && matchingRoute.action.type === 'forward' && matchingRoute.action.targets && matchingRoute.action.targets.length > 0) {
this.logger.debug(`Found matching route for HTTP/2 request: ${matchingRoute.name || 'unnamed'}`);
// Select the appropriate target from the targets array
const selectedTarget = this.selectTarget(matchingRoute.action.targets, {
port: routeContext.port,
path: routeContext.path,
headers: routeContext.headers,
method: routeContext.method
});
if (!selectedTarget) {
this.logger.error(`No matching target found for route ${matchingRoute.name}`);
stream.respond({ ':status': 502 });
stream.end();
return;
}
// Extract target information, resolving functions if needed
let targetHost: string | string[];
let targetPort: number;
try {
// Check function cache for host and resolve or use cached value
if (typeof matchingRoute.action.target.host === 'function') {
if (typeof selectedTarget.host === 'function') {
// Generate a function ID for caching (use route name or ID if available)
const functionId = `host-http2-${matchingRoute.id || matchingRoute.name || 'unnamed'}`;
@@ -648,7 +751,7 @@ export class RequestHandler {
this.logger.debug(`Using cached host value for HTTP/2: ${functionId}`);
} else {
// Resolve the function and cache the result
const resolvedHost = matchingRoute.action.target.host(toBaseContext(routeContext));
const resolvedHost = selectedTarget.host(toBaseContext(routeContext));
targetHost = resolvedHost;
// Cache the result
@@ -657,16 +760,16 @@ export class RequestHandler {
}
} else {
// No cache available, just resolve
const resolvedHost = matchingRoute.action.target.host(routeContext);
const resolvedHost = selectedTarget.host(routeContext);
targetHost = resolvedHost;
this.logger.debug(`Resolved HTTP/2 function-based host to: ${Array.isArray(resolvedHost) ? resolvedHost.join(', ') : resolvedHost}`);
}
} else {
targetHost = matchingRoute.action.target.host;
targetHost = selectedTarget.host;
}
// Check function cache for port and resolve or use cached value
if (typeof matchingRoute.action.target.port === 'function') {
if (typeof selectedTarget.port === 'function') {
// Generate a function ID for caching
const functionId = `port-http2-${matchingRoute.id || matchingRoute.name || 'unnamed'}`;
@@ -678,7 +781,7 @@ export class RequestHandler {
this.logger.debug(`Using cached port value for HTTP/2: ${functionId}`);
} else {
// Resolve the function and cache the result
const resolvedPort = matchingRoute.action.target.port(toBaseContext(routeContext));
const resolvedPort = selectedTarget.port(toBaseContext(routeContext));
targetPort = resolvedPort;
// Cache the result
@@ -687,12 +790,12 @@ export class RequestHandler {
}
} else {
// No cache available, just resolve
const resolvedPort = matchingRoute.action.target.port(routeContext);
const resolvedPort = selectedTarget.port(routeContext);
targetPort = resolvedPort;
this.logger.debug(`Resolved HTTP/2 function-based port to: ${resolvedPort}`);
}
} else {
targetPort = matchingRoute.action.target.port === 'preserve' ? routeContext.port : matchingRoute.action.target.port as number;
targetPort = selectedTarget.port === 'preserve' ? routeContext.port : selectedTarget.port as number;
}
// Select a single host if an array was provided