| 117 | } |
| 118 | |
| 119 | void FetchRequest::handle_dns_lookup() { |
| 120 | // Pump async system before DNS to keep server responsive |
| 121 | fl::task::run(1000); |
| 122 | |
| 123 | FL_WARN("[FETCH] Resolving hostname: " << mHostname); |
| 124 | |
| 125 | // DNS lookup (blocking 10-100ms, but acceptable) |
| 126 | // Note: localhost is typically instant due to OS caching |
| 127 | mDnsResult = gethostbyname(mHostname.c_str()); |
| 128 | |
| 129 | // Pump async system after DNS to resume server pumping |
| 130 | fl::task::run(1000); |
| 131 | |
| 132 | if (!mDnsResult) { |
| 133 | complete_error("DNS lookup failed"); |
| 134 | return; |
| 135 | } |
| 136 | |
| 137 | // Create socket |
| 138 | mSocketFd = socket(AF_INET, SOCK_STREAM, 0); |
| 139 | if (mSocketFd < 0) { |
| 140 | complete_error("Failed to create socket"); |
| 141 | return; |
| 142 | } |
| 143 | |
| 144 | // Set non-blocking mode |
| 145 | #ifdef FL_IS_WIN |
| 146 | u_long mode = 1; // 1 = non-blocking |
| 147 | ioctlsocket(mSocketFd, FIONBIO, &mode); |
| 148 | #else |
| 149 | int flags = fcntl(mSocketFd, F_GETFL, 0); |
| 150 | fcntl(mSocketFd, F_SETFL, flags | O_NONBLOCK); |
| 151 | #endif |
| 152 | |
| 153 | // Initiate non-blocking connect |
| 154 | sockaddr_in server_addr{}; |
| 155 | server_addr.sin_family = AF_INET; |
| 156 | server_addr.sin_port = htons(static_cast<u16>(mPort)); |
| 157 | // Use memcpy to extract address pointer — h_addr_list[0] may be misaligned |
| 158 | // on some platforms (macOS arm64 UBSan flags this) |
| 159 | char *addr_ptr = nullptr; |
| 160 | fl::memcpy(&addr_ptr, mDnsResult->h_addr_list, sizeof(addr_ptr)); |
| 161 | fl::memcpy(&server_addr.sin_addr, addr_ptr, mDnsResult->h_length); |
| 162 | |
| 163 | FL_WARN("[FETCH] Waiting for connection to " << mHostname << ":" << mPort); |
| 164 | |
| 165 | connect(mSocketFd, (sockaddr*)&server_addr, sizeof(server_addr)); |
| 166 | // connect() returns immediately with EINPROGRESS/WSAEWOULDBLOCK (expected) |
| 167 | |
| 168 | mState = CONNECTING; |
| 169 | mStateStartTime = fl::millis(); |
| 170 | } |
| 171 | |
| 172 | void FetchRequest::handle_connecting() { |
| 173 | fd_set write_fds; |