Private Properties

Constructor

php
public function __construct(&$db)	

• $db - Database object reference

1. Stores database reference
2. Extracts and normalizes REQUEST_URI
3. Detects TLS/HTTPS session status
4. Determines client's real IP address
5. Sets up TLS mark cookie name
6. Enforces TLS session upgrade if needed

php
$http = new Http($db);	

Core Methods

Session Management

session($route): void

• $route (int) - Routing flag:
• Bit 2 ($route & 2): Enable static mode for files/freecap (disables replay prevention and ID regeneration)

• Selects storage backend (file or database)
• Configures cookie settings (security, path, httponly)
• Binds IP and TLS validation
• Recovers diagnostic logs from previous session

php
$http->session(0);  // Normal session
$http->session(2);  // Static file serving mode	

Caching System

check_cache($page, $method): void

• $page (string) - Page name to cache
• $method (string) - Request method/action (e.g., 'show', 'edit')

• ✅ Enabled for GET requests only
• ✅ Disabled for POST requests
• ❌ Never cached for 'edit' or 'watch' methods
• ✅ Only cached for anonymous users (no logged-in users)

php
$http->check_cache('HomePage', 'show');	

store_cache(): void

• Retrieves output buffer content
• Saves to cache file with proper permissions
• Records cache metadata in database
• Only executes if caching flag is set and user is anonymous

php
// Called at end of page rendering
$http->store_cache();	

invalidate_page($page): int

• $page (string) - Page name to invalidate

• Number of cache entries invalidated

1. Finds all cached versions (different methods/languages)
2. Touches files to past timestamp (faster than deletion)
3. Removes entries from cache metadata table
4. Returns count of invalidated caches

php
$count = $http->invalidate_page('HomePage');
echo "Invalidated $count cache entries";	

TLS/HTTPS Security

secure_base_url(): void

• Ensures all subsequent URLs use HTTPS
• Stores original HTTP URL for fallback
• Called when TLS session is detected

php
$http->secure_base_url();
// $db->base_url now uses https://	

ensure_tls($url): void

• $url (string) - URL to secure

• If not already HTTPS and TLS is enabled, forces HTTPS redirect
• Handles both relative and absolute URLs
• Converts relative URLs using current server name

php
$http->ensure_tls('/secure/payment');	

IP Address Detection

real_ip(): string (Private)

1. HTTP_X_CLUSTER_CLIENT_IP
2. HTTP_X_FORWARDED_FOR (or custom header)
3. HTTP_CLIENT_IP
4. HTTP_X_REMOTE_ADDR
5. REMOTE_ADDR (fallback)

• Filters out private/reserved IP ranges
• Respects configured reverse proxy addresses
• Returns '0.0.0.0' as fallback

• reverse_proxy_addresses - Comma/space-separated proxy IPs
• reverse_proxy_header - Custom header name (default: X-Forwarded-For)

php
$client_ip = $http->ip;  // e.g., "203.0.113.42"	

HTTPS Detection

tls_session(): bool (Private)

• $_SERVER['HTTPS'] is 'on'
• $_SERVER['SERVER_PORT'] is 443
• $_SERVER['HTTP_X_FORWARDED_PROTO'] is 'https'
• $_SERVER['HTTP_X_FORWARDED_SSL'] is 'on'
• $_SERVER['HTTP_X_FORWARDED_PORT'] is 443

Security Headers

http_security_headers(): void

• 0 - Disabled
• 1 - Default policy (from csp.conf)
• 2 - Custom policy (from csp_custom.conf)

php
$http->http_security_headers();	

HTTP Methods

redirect($url, $permanent = false): void

• $url (string) - Target URL
• $permanent (bool) - Use 301 (permanent) vs 302 (temporary)

• Decodes & entities to prevent broken redirects
• Only works if headers not yet sent
• Uses output buffering to work anywhere in page processing

php
$http->redirect('http://example.com/new-page', true);  // 301
$http->redirect('/wiki/HomePage');                       // 302	

terminate(): void

• Saves diagnostic logs to session flash data
• Ends script execution

php
$http->terminate();	

status($code): void

php
200 => 'OK'
206 => 'Partial Content'
301 => 'Moved Permanently'
302 => 'Moved Temporarily'
304 => 'Not Modified'
400 => 'Bad Request'
401 => 'Unauthorized'
403 => 'Forbidden'
404 => 'Not Found'
405 => 'Method Not Allowed'
409 => 'Conflict'
410 => 'Gone'
416 => 'Requested Range Not Satisfiable'
500 => 'Internal Server Error'
501 => 'Not Implemented'
503 => 'Service Unavailable'	

php
$http->status(404);  // Send 404 Not Found	

Caching Control

no_cache($client_only = true): void

• $client_only (bool, default: TRUE)
• TRUE: Disable browser cache only
• FALSE: Disable both browser and server cache

• Last-Modified: <current-time> (always fresh)
• Cache-Control: no-store

php
$http->no_cache();        // Client-side only
$http->no_cache(false);   // Both client & server	

cache_promisc(): void

• Cache-Control: public

php
$http->cache_promisc();	

Language Negotiation

user_agent_language(): string

• Follows RFC 9110 section 12.5.4 (HTTP Accept-Language)
• Parses Accept-Language header with quality factors
• Attempts exact match first, then language fallback
• Falls back to default system language

Accept-Language: en-US,en;q=0.9,de;q=0.8	

• Language code (e.g., 'en', 'en-US', 'de')

available_languages($subset = true): array

• $subset (bool, default: TRUE)
• TRUE: Only allowed languages
• FALSE: All available languages

• Scans LANG_DIR for language files
• Filters by allowed_languages config if set
• Caches result in session
• System language always included

• Associative array: ['en' => 'en', 'de' => 'de', ...]

php
$all_langs = $http->available_languages(false);
$allowed = $http->available_languages(true);	

File Serving

sendfile($path, $filename = null, $age = null): void

• $path (string) - File path (or HTTP_XXX constant for error pages)
• $filename (string, optional) - Custom download filename
• $age (int, optional) - Cache age in days

• HTTP range request support (partial file downloads)
• ETag and Last-Modified conditional requests
• Proper MIME type detection
• Content-Security-Policy for special file types
• Streaming for large files
• GZip compression for text files

php
$http->sendfile(404);  // Serves file defined by HTTP_404 constant
$http->sendfile(403);  // Serves file defined by HTTP_403 constant	

php
$http->sendfile('uploads/document.pdf', 'my-document.pdf', 30);	

mime_type($path): string

• MIME type string (e.g., 'application/pdf')
• Default: 'application/octet-stream'

php
$mime = $http->mime_type('file.pdf');  // 'application/pdf'	

mime_types(): array (Private)

• Reads from config/mime.types
• Caches to cache/config/mime.types
• Reloads if config is updated

Compression

gzip(): void

• Manually implements gzip (not relying on zlib.output_compression)
• Produces correct Content-Length header
• Only compresses if:
• 860 bytes < content < 1 MB
• Client accepts compression
• Headers not already sent

php
$http->gzip();	

Utility Methods

parse_str($str): array (Private)

• Safely handles special characters in query/form data
• Converts encoding properly

php
$data = $http->parse_str('name=John&age=30');	

request_uri(): string (Private)

• Removes base URL prefix
• Removes spaces
• Collapses multiple slashes
• Removes .. path traversal attempts
• Removes leading/trailing slashes

cut_prefix($prefix, $path): string (Private)

get_header_conf($file_name): string (Private)

• csp.conf / csp_custom.conf
• permissions_policy.conf / permissions_policy_custom.conf

Configuration Dependencies

Constants Used