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This commit is contained in:
Philipp Kunz
2025-05-29 01:00:20 +00:00
parent 2024ea5a69
commit d8d1bdcd41
14 changed files with 190 additions and 791 deletions
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3
ts/proxies/http-proxy/handlers/index.ts
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@ -2,5 +2,4 @@
* HTTP handlers for various route types
*/
export { RedirectHandler } from './redirect-handler.js';
export { StaticHandler } from './static-handler.js';
// Empty - all handlers have been removed

105
ts/proxies/http-proxy/handlers/redirect-handler.ts
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@ -1,105 +0,0 @@
import * as plugins from '../../../plugins.js';
import type { IRouteConfig } from '../../smart-proxy/models/route-types.js';
import type { IConnectionRecord } from '../../smart-proxy/models/interfaces.js';
import type { ILogger } from '../models/types.js';
import { createLogger } from '../models/types.js';
import { HttpStatus, getStatusText } from '../models/http-types.js';
export interface IRedirectHandlerContext {
connectionId: string;
connectionManager: any; // Avoid circular deps
settings: any;
logger?: ILogger;
}
/**
* Handles HTTP redirect routes
*/
export class RedirectHandler {
/**
* Handle redirect routes
*/
public static async handleRedirect(
socket: plugins.net.Socket,
route: IRouteConfig,
context: IRedirectHandlerContext
): Promise<void> {
const { connectionId, connectionManager, settings } = context;
const logger = context.logger || createLogger(settings.logLevel || 'info');
const action = route.action;
// We should have a redirect configuration
if (!action.redirect) {
logger.error(`[${connectionId}] Redirect action missing redirect configuration`);
socket.end();
connectionManager.cleanupConnection({ id: connectionId }, 'missing_redirect');
return;
}
// For TLS connections, we can't do redirects at the TCP level
// This check should be done before calling this handler
// Wait for the first HTTP request to perform the redirect
const dataListeners: ((chunk: Buffer) => void)[] = [];
const httpDataHandler = (chunk: Buffer) => {
// Remove all data listeners to avoid duplicated processing
for (const listener of dataListeners) {
socket.removeListener('data', listener);
}
// Parse HTTP request to get path
try {
const headersEnd = chunk.indexOf('\r\n\r\n');
if (headersEnd === -1) {
// Not a complete HTTP request, need more data
socket.once('data', httpDataHandler);
dataListeners.push(httpDataHandler);
return;
}
const httpHeaders = chunk.slice(0, headersEnd).toString();
const requestLine = httpHeaders.split('\r\n')[0];
const [method, path] = requestLine.split(' ');
// Extract Host header
const hostMatch = httpHeaders.match(/Host: (.+?)(\r\n|\r|\n|$)/i);
const host = hostMatch ? hostMatch[1].trim() : '';
// Process the redirect URL with template variables
let redirectUrl = action.redirect.to;
redirectUrl = redirectUrl.replace(/\{domain\}/g, host);
redirectUrl = redirectUrl.replace(/\{path\}/g, path || '');
redirectUrl = redirectUrl.replace(/\{port\}/g, socket.localPort?.toString() || '80');
// Prepare the HTTP redirect response
const redirectResponse = [
`HTTP/1.1 ${action.redirect.status} Moved`,
`Location: ${redirectUrl}`,
'Connection: close',
'Content-Length: 0',
'',
'',
].join('\r\n');
if (settings.enableDetailedLogging) {
logger.info(
`[${connectionId}] Redirecting to ${redirectUrl} with status ${action.redirect.status}`
);
}
// Send the redirect response
socket.end(redirectResponse);
connectionManager.initiateCleanupOnce({ id: connectionId }, 'redirect_complete');
} catch (err) {
logger.error(`[${connectionId}] Error processing HTTP redirect: ${err}`);
socket.end();
connectionManager.initiateCleanupOnce({ id: connectionId }, 'redirect_error');
}
};
// Setup the HTTP data handler
socket.once('data', httpDataHandler);
dataListeners.push(httpDataHandler);
}
}

261
ts/proxies/http-proxy/handlers/static-handler.ts
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@ -1,261 +0,0 @@
import * as plugins from '../../../plugins.js';
import type { IRouteConfig } from '../../smart-proxy/models/route-types.js';
import type { IConnectionRecord } from '../../smart-proxy/models/interfaces.js';
import type { ILogger } from '../models/types.js';
import { createLogger } from '../models/types.js';
import type { IRouteContext } from '../../../core/models/route-context.js';
import { HttpStatus, getStatusText } from '../models/http-types.js';
export interface IStaticHandlerContext {
connectionId: string;
connectionManager: any; // Avoid circular deps
settings: any;
logger?: ILogger;
}
/**
* Handles static routes including ACME challenges
*/
export class StaticHandler {
/**
* Handle static routes
*/
public static async handleStatic(
socket: plugins.net.Socket,
route: IRouteConfig,
context: IStaticHandlerContext,
record: IConnectionRecord,
initialChunk?: Buffer
): Promise<void> {
const { connectionId, connectionManager, settings } = context;
const logger = context.logger || createLogger(settings.logLevel || 'info');
if (!route.action.handler) {
logger.error(`[${connectionId}] Static route '${route.name}' has no handler`);
socket.end();
connectionManager.cleanupConnection(record, 'no_handler');
return;
}
let buffer = Buffer.alloc(0);
let processingData = false;
const handleHttpData = async (chunk: Buffer) => {
// Accumulate the data
buffer = Buffer.concat([buffer, chunk]);
// Prevent concurrent processing of the same buffer
if (processingData) return;
processingData = true;
try {
// Process data until we have a complete request or need more data
await processBuffer();
} finally {
processingData = false;
}
};
const processBuffer = async () => {
// Look for end of HTTP headers
const headerEndIndex = buffer.indexOf('\r\n\r\n');
if (headerEndIndex === -1) {
// Need more data
if (buffer.length > 8192) {
// Prevent excessive buffering
logger.error(`[${connectionId}] HTTP headers too large`);
socket.end();
connectionManager.cleanupConnection(record, 'headers_too_large');
}
return; // Wait for more data to arrive
}
// Parse the HTTP request
const headerBuffer = buffer.slice(0, headerEndIndex);
const headers = headerBuffer.toString();
const lines = headers.split('\r\n');
if (lines.length === 0) {
logger.error(`[${connectionId}] Invalid HTTP request`);
socket.end();
connectionManager.cleanupConnection(record, 'invalid_request');
return;
}
// Parse request line
const requestLine = lines[0];
const requestParts = requestLine.split(' ');
if (requestParts.length < 3) {
logger.error(`[${connectionId}] Invalid HTTP request line`);
socket.end();
connectionManager.cleanupConnection(record, 'invalid_request_line');
return;
}
const [method, path, httpVersion] = requestParts;
// Parse headers
const headersMap: Record<string, string> = {};
for (let i = 1; i < lines.length; i++) {
const colonIndex = lines[i].indexOf(':');
if (colonIndex > 0) {
const key = lines[i].slice(0, colonIndex).trim().toLowerCase();
const value = lines[i].slice(colonIndex + 1).trim();
headersMap[key] = value;
}
}
// Check for Content-Length to handle request body
const requestBodyLength = parseInt(headersMap['content-length'] || '0', 10);
const bodyStartIndex = headerEndIndex + 4; // Skip the \r\n\r\n
// If there's a body, ensure we have the full body
if (requestBodyLength > 0) {
const totalExpectedLength = bodyStartIndex + requestBodyLength;
// If we don't have the complete body yet, wait for more data
if (buffer.length < totalExpectedLength) {
// Implement a reasonable body size limit to prevent memory issues
if (requestBodyLength > 1024 * 1024) {
// 1MB limit
logger.error(`[${connectionId}] Request body too large`);
socket.end();
connectionManager.cleanupConnection(record, 'body_too_large');
return;
}
return; // Wait for more data
}
}
// Extract query string if present
let pathname = path;
let query: string | undefined;
const queryIndex = path.indexOf('?');
if (queryIndex !== -1) {
pathname = path.slice(0, queryIndex);
query = path.slice(queryIndex + 1);
}
try {
// Get request body if present
let requestBody: Buffer | undefined;
if (requestBodyLength > 0) {
requestBody = buffer.slice(bodyStartIndex, bodyStartIndex + requestBodyLength);
}
// Pause socket to prevent data loss during async processing
socket.pause();
// Remove the data listener since we're handling the request
socket.removeListener('data', handleHttpData);
// Build route context with parsed HTTP information
const context: IRouteContext = {
port: record.localPort,
domain: record.lockedDomain || headersMap['host']?.split(':')[0],
clientIp: record.remoteIP,
serverIp: socket.localAddress!,
path: pathname,
query: query,
headers: headersMap,
isTls: record.isTLS,
tlsVersion: record.tlsVersion,
routeName: route.name,
routeId: route.id,
timestamp: Date.now(),
connectionId,
};
// Since IRouteContext doesn't have a body property,
// we need an alternative approach to handle the body
let response;
if (requestBody) {
if (settings.enableDetailedLogging) {
logger.info(
`[${connectionId}] Processing request with body (${requestBody.length} bytes)`
);
}
// Pass the body as an additional parameter by extending the context object
// This is not type-safe, but it allows handlers that expect a body to work
const extendedContext = {
...context,
// Provide both raw buffer and string representation
requestBody: requestBody,
requestBodyText: requestBody.toString(),
method: method,
};
// Call the handler with the extended context
// The handler needs to know to look for the non-standard properties
response = await route.action.handler(extendedContext as any);
} else {
// Call the handler with the standard context
const extendedContext = {
...context,
method: method,
};
response = await route.action.handler(extendedContext as any);
}
// Prepare the HTTP response
const responseHeaders = response.headers || {};
const contentLength = Buffer.byteLength(response.body || '');
responseHeaders['Content-Length'] = contentLength.toString();
if (!responseHeaders['Content-Type']) {
responseHeaders['Content-Type'] = 'text/plain';
}
// Build the response
let httpResponse = `HTTP/1.1 ${response.status} ${getStatusText(response.status)}\r\n`;
for (const [key, value] of Object.entries(responseHeaders)) {
httpResponse += `${key}: ${value}\r\n`;
}
httpResponse += '\r\n';
// Send response
socket.write(httpResponse);
if (response.body) {
socket.write(response.body);
}
socket.end();
connectionManager.cleanupConnection(record, 'completed');
} catch (error) {
logger.error(`[${connectionId}] Error in static handler: ${error}`);
// Send error response
const errorResponse =
'HTTP/1.1 500 Internal Server Error\r\n' +
'Content-Type: text/plain\r\n' +
'Content-Length: 21\r\n' +
'\r\n' +
'Internal Server Error';
socket.write(errorResponse);
socket.end();
connectionManager.cleanupConnection(record, 'handler_error');
}
};
// Process initial chunk if provided
if (initialChunk && initialChunk.length > 0) {
if (settings.enableDetailedLogging) {
logger.info(`[${connectionId}] Processing initial data chunk (${initialChunk.length} bytes)`);
}
// Process the initial chunk immediately
handleHttpData(initialChunk);
}
// Listen for additional data
socket.on('data', handleHttpData);
// Ensure cleanup on socket close
socket.once('close', () => {
socket.removeListener('data', handleHttpData);
});
}
}