extends RefCounted
class_name GurtProtocol
const DNS_API_URL = "gurt://localhost:8877"
# DNS resolution cache: domain.tld -> IP address
static var _dns_cache: Dictionary = {}
static func is_gurt_domain(url: String) -> bool:
if url.begins_with("gurt://"):
return true
if not url.contains("://"):
var parts = url.split(".")
return parts.size() == 2
return false
static func parse_gurt_domain(url: String) -> Dictionary:
var domain_part = url
var path = "/"
if url.begins_with("gurt://"):
domain_part = url.substr(7)
# Extract path from domain_part (e.g., "test.dawg/script.lua" -> "test.dawg" + "/script.lua")
var path_start = domain_part.find("/")
if path_start != -1:
path = domain_part.substr(path_start)
domain_part = domain_part.substr(0, path_start)
# Check if domain is cached (resolved before)
var domain_key = domain_part
if _dns_cache.has(domain_key):
return {
"direct_address": _dns_cache[domain_key],
"display_url": domain_part + path,
"is_direct": true,
"path": path,
"full_domain": domain_part
}
if domain_part.contains(":") or domain_part.begins_with("127.0.0.1") or domain_part.begins_with("localhost") or is_ip_address(domain_part):
return {
"direct_address": domain_part,
"display_url": domain_part + path,
"is_direct": true,
"path": path,
"full_domain": domain_part
}
var parts = domain_part.split(".")
if parts.size() < 2:
return {}
# Support subdomains (e.g., api.blog.example.com)
if parts.size() == 2:
return {
"name": parts[0],
"tld": parts[1],
"display_url": domain_part + path,
"is_direct": false,
"path": path,
"full_domain": domain_part,
"is_subdomain": false
}
else:
return {
"name": parts[parts.size() - 2], # The domain name part
"tld": parts[parts.size() - 1], # The TLD part
"display_url": domain_part + path,
"is_direct": false,
"path": path,
"full_domain": domain_part,
"is_subdomain": true,
"subdomain_parts": parts.slice(0, parts.size() - 2)
}
static func is_ip_address(address: String) -> bool:
var parts = address.split(".")
if parts.size() != 4:
return false
for part in parts:
if not part.is_valid_int():
return false
var num = part.to_int()
if num < 0 or num > 255:
return false
return true
static func fetch_domain_info(name: String, tld: String) -> Dictionary:
var request_data = JSON.stringify({"name": name, "tld": tld})
var result = await fetch_dns_post_working("localhost:8877", "/resolve", request_data)
if result.has("error"):
return {"error": result.error}
if not result.has("content"):
return {"error": "No content in DNS response"}
var content_str = result.content.get_string_from_utf8()
var json = JSON.new()
var parse_result = json.parse(content_str)
if parse_result != OK:
return {"error": "Invalid JSON in DNS response"}
return json.data
static func fetch_full_domain_info(full_domain: String, record_type: String = "") -> Dictionary:
var request_data = {"domain": full_domain}
if not record_type.is_empty():
request_data["record_type"] = record_type
var json_data = JSON.stringify(request_data)
var result = await fetch_dns_post_working("localhost:8877", "/resolve-full", json_data)
if result.has("error"):
return {"error": result.error}
if not result.has("content"):
return {"error": "No content in DNS response"}
var content_str = result.content.get_string_from_utf8()
var json = JSON.new()
var parse_result = json.parse(content_str)
if parse_result != OK:
return {"error": "Invalid JSON in DNS response"}
return json.data
static func fetch_dns_post_working(server: String, path: String, json_data: String) -> Dictionary:
var shared_result = {"finished": false}
var thread = Thread.new()
var mutex = Mutex.new()
var thread_func = func():
var local_result = {}
var client = GurtProtocolClient.new()
for ca_cert in CertificateManager.trusted_ca_certificates:
client.add_ca_certificate(ca_cert)
if not client.create_client(10):
local_result = {"error": "Failed to create client"}
else:
var url = "gurt://" + server + path
# Prepare request options
var options = {
"method": "POST",
"headers": {"Content-Type": "application/json"},
"body": json_data
}
var response = client.request(url, options)
client.disconnect()
if not response:
local_result = {"error": "No response from server"}
elif not response.is_success:
local_result = {"error": "Server error: " + str(response.status_code) + " " + str(response.status_message)}
else:
local_result = {"content": response.body}
mutex.lock()
shared_result.clear()
for key in local_result:
shared_result[key] = local_result[key]
shared_result["finished"] = true
mutex.unlock()
thread.start(thread_func)
# Non-blocking wait
while not shared_result.get("finished", false):
await Engine.get_main_loop().process_frame
thread.wait_to_finish()
mutex.lock()
var final_result = {}
for key in shared_result:
if key != "finished":
final_result[key] = shared_result[key]
mutex.unlock()
return final_result
static func fetch_content_via_gurt(ip: String, path: String = "/") -> Dictionary:
var client = GurtProtocolClient.new()
for ca_cert in CertificateManager.trusted_ca_certificates:
client.add_ca_certificate(ca_cert)
if not client.create_client(30):
return {"error": "Failed to create GURT client"}
var gurt_url = "gurt://" + ip + ":4878" + path
var response = client.request(gurt_url, {"method": "GET"})
client.disconnect()
if not response:
return {"error": "No response from GURT server"}
if not response.is_success:
var error_msg = "Server returned status " + str(response.status_code) + ": " + response.status_message
return {"error": error_msg}
var content = response.body
return {"content": content, "headers": response.headers}
static func fetch_content_via_gurt_direct(address: String, path: String = "/") -> Dictionary:
var shared_result = {"finished": false}
var thread = Thread.new()
var mutex = Mutex.new()
var thread_func = func():
var local_result = {}
var client = GurtProtocolClient.new()
for ca_cert in CertificateManager.trusted_ca_certificates:
client.add_ca_certificate(ca_cert)
if not client.create_client(10):
local_result = {"error": "Failed to create GURT client"}
else:
var gurt_url: String
if address.contains(":"):
gurt_url = "gurt://" + address + path
else:
gurt_url = "gurt://" + address + ":4878" + path
var response = client.request(gurt_url, {"method": "GET"})
client.disconnect()
if not response:
local_result = {"error": "No response from GURT server"}
else:
var content = response.body
if not response.is_success:
var error_msg = "Server returned status " + str(response.status_code) + ": " + response.status_message
local_result = {"error": error_msg, "content": content, "headers": response.headers}
else:
local_result = {"content": content, "headers": response.headers}
mutex.lock()
shared_result.clear()
for key in local_result:
shared_result[key] = local_result[key]
shared_result["finished"] = true
mutex.unlock()
thread.start(thread_func)
# Non-blocking wait using signals instead of polling
while not shared_result.get("finished", false):
await Engine.get_main_loop().process_frame
# Yield control back to the main thread without blocking delays
thread.wait_to_finish()
mutex.lock()
var final_result = {}
for key in shared_result:
if key != "finished":
final_result[key] = shared_result[key]
mutex.unlock()
return final_result
static func handle_gurt_domain(url: String) -> Dictionary:
var parsed = parse_gurt_domain(url)
if parsed.is_empty():
return {"error": "Invalid domain format. Use: domain.tld or IP:port", "html": create_error_page("Invalid domain format. Use: domain.tld or IP:port")}
var target_address: String
var path = parsed.get("path", "/")
if parsed.get("is_direct", false):
target_address = parsed.direct_address
else:
var domain_info: Dictionary
# Use the new full domain resolution for subdomains
if parsed.get("is_subdomain", false):
domain_info = await fetch_full_domain_info(parsed.full_domain)
else:
domain_info = await fetch_domain_info(parsed.name, parsed.tld)
if domain_info.has("error"):
return {"error": domain_info.error, "html": create_error_page(domain_info.error)}
# Process DNS records to find target address
var target_result = await resolve_target_address(domain_info, parsed.full_domain)
if target_result.has("error"):
return {"error": target_result.error, "html": create_error_page(target_result.error)}
target_address = target_result.address
# Cache the resolved address
var domain_key = parsed.full_domain
_dns_cache[domain_key] = target_address
var content_result = await fetch_content_via_gurt_direct(target_address, path)
if content_result.has("error"):
var error_msg = "Failed to fetch content from " + target_address + path + " via GURT protocol - " + content_result.error
if content_result.has("content") and not content_result.content.is_empty():
return {"html": content_result.content, "display_url": parsed.display_url}
return {"error": error_msg, "html": create_error_page(error_msg)}
if not content_result.has("content"):
var error_msg = "No content received from " + target_address + path
return {"error": error_msg, "html": create_error_page(error_msg)}
var html_content = content_result.content
if html_content.is_empty():
var error_msg = "Empty content received from " + target_address + path
return {"error": error_msg, "html": create_error_page(error_msg)}
return {"html": html_content, "display_url": parsed.display_url}
static func resolve_target_address(domain_info: Dictionary, original_domain: String) -> Dictionary:
if not domain_info.has("records") or domain_info.records == null:
return {"error": "No DNS records found for domain"}
var records = domain_info.records
var max_cname_depth = 5 # Prevent infinite CNAME loops
var cname_depth = 0
# First pass: Look for direct A/AAAA records
var a_records = []
var aaaa_records = []
var cname_records = []
var ns_records = []
for record in records:
if not record.has("type") or not record.has("value"):
continue
match record.type:
"A":
a_records.append(record.value)
"AAAA":
aaaa_records.append(record.value)
"CNAME":
cname_records.append(record.value)
"NS":
ns_records.append(record.value)
# If we have direct A records, use the first one
if not a_records.is_empty():
return {"address": a_records[0]}
# If we have IPv6 AAAA records and no A records, we need to handle this
if not aaaa_records.is_empty() and a_records.is_empty():
return {"error": "Only IPv6 (AAAA) records found, but IPv4 required for GURT protocol"}
# Follow CNAME chain
if not cname_records.is_empty():
var current_cname = cname_records[0]
while cname_depth < max_cname_depth:
cname_depth += 1
# Try to resolve the CNAME target
var cname_info = await fetch_full_domain_info(current_cname, "A")
if cname_info.has("error"):
return {"error": "Failed to resolve CNAME target: " + current_cname + " - " + cname_info.error}
if not cname_info.has("records") or cname_info.records == null:
return {"error": "No records found for CNAME target: " + current_cname}
# Look for A records in the CNAME target
var found_next_cname = false
for record in cname_info.records:
if record.has("type") and record.type == "A" and record.has("value"):
return {"address": record.value}
elif record.has("type") and record.type == "CNAME" and record.has("value"):
# Another CNAME, continue the chain
current_cname = record.value
found_next_cname = true
break
if not found_next_cname:
# No more CNAMEs found, but also no A record
return {"error": "CNAME chain ended without A record for: " + current_cname}
return {"error": "CNAME chain too deep (max " + str(max_cname_depth) + " levels)"}
# If we have NS records, this indicates delegation
if not ns_records.is_empty():
return {"error": "Domain is delegated to nameservers: " + str(ns_records) + ". Cannot resolve directly."}
return {"error": "No A record found for domain"}
static func get_error_type(error_message: String) -> Dictionary:
if "DNS server is not responding" in error_message or "Domain not found" in error_message:
return {"code": "ERR_NAME_NOT_RESOLVED", "title": "This site can't be reached", "icon": "🌐"}
elif "timeout" in error_message.to_lower() or "timed out" in error_message.to_lower():
return {"code": "ERR_CONNECTION_TIMED_OUT", "title": "This site can't be reached", "icon": "⏰"}
elif "Failed to fetch" in error_message or "No response" in error_message:
return {"code": "ERR_CONNECTION_REFUSED", "title": "This site can't be reached", "icon": "🚫"}
elif "Invalid domain format" in error_message:
return {"code": "ERR_INVALID_URL", "title": "This page isn't working", "icon": "⚠️"}
else:
return {"code": "ERR_UNKNOWN", "title": "Something went wrong", "icon": "❌"}
static func create_error_page(error_message: String) -> PackedByteArray:
var error_info = get_error_type(error_message)
return ("""
""" + error_info.title + """ - GURT