feat: add node HTTP control, engine-to-node communication, connect-input/output API

- Node control server now accepts HTTP POST /cmd for command dispatch (in addition to existing WebSocket control) - Added NodeControlClient: engine sends commands to nodes via HTTP POST - New REST endpoints: POST /api/graph/nodes/:id/connect-input - connect node input to MXL flow POST /api/graph/nodes/:id/connect-output - create new MXL flow + connect output POST /api/graph/nodes/:id/disconnect-port - remove reader/writer POST /api/graph/nodes/:id/command - send raw command to node - Flow IDs now use proper UUID v4 format (MXL requires standard UUIDs) - Flow definitions use NMOS format (urn:x-nmos:format:video) - Engine passes --mxl-domain to node processes - User-provided node IDs (via 'id' field in POST body) - End-to-end verified: testsrc → passthrough → new MXL output flow
2026-05-26 21:33:17 +03:00
parent 1d6f93679f
commit 5b2d420e71
8 changed files with 474 additions and 92 deletions
@@ -0,0 +1,88 @@
+#include <dmf-engine/node_control_client.hpp>
+
+#include <spdlog/spdlog.h>
+
+#include <arpa/inet.h>
+#include <cstring>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <sstream>
+
+namespace dmf_engine {
+
+void NodeControlClient::register_node(const std::string& node_id, uint16_t port) {
+    node_ports_[node_id] = port;
+    spdlog::info("NodeControlClient: registered node '{}' on port {}", node_id, port);
+}
+
+void NodeControlClient::unregister_node(const std::string& node_id) {
+    node_ports_.erase(node_id);
+}
+
+uint16_t NodeControlClient::get_port(const std::string& node_id) const {
+    auto it = node_ports_.find(node_id);
+    return it != node_ports_.end() ? it->second : 0;
+}
+
+bool NodeControlClient::send_command(uint16_t port, const std::string& json_cmd) {
+    int fd = socket(AF_INET, SOCK_STREAM, 0);
+    if (fd < 0) {
+        spdlog::error("NodeControlClient: socket() failed: {}", strerror(errno));
+        return false;
+    }
+
+    struct timeval tv;
+    tv.tv_sec = 2;
+    tv.tv_usec = 0;
+    setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+    setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
+
+    struct sockaddr_in addr;
+    std::memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+    inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
+
+    if (connect(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)) < 0) {
+        spdlog::error("NodeControlClient: connect to port {} failed: {}", port, strerror(errno));
+        close(fd);
+        return false;
+    }
+
+    std::ostringstream req;
+    req << "POST /cmd HTTP/1.1\r\n"
+        << "Host: 127.0.0.1:" << port << "\r\n"
+        << "Content-Type: application/json\r\n"
+        << "Content-Length: " << json_cmd.size() << "\r\n"
+        << "Connection: close\r\n"
+        << "\r\n"
+        << json_cmd;
+
+    auto request = req.str();
+    auto sent = write(fd, request.data(), request.size());
+    if (sent != static_cast<ssize_t>(request.size())) {
+        spdlog::error("NodeControlClient: write failed on port {}", port);
+        close(fd);
+        return false;
+    }
+
+    char resp_buf[4096] = {};
+    auto n = read(fd, resp_buf, sizeof(resp_buf) - 1);
+    close(fd);
+
+    if (n <= 0) {
+        spdlog::error("NodeControlClient: read failed on port {}", port);
+        return false;
+    }
+
+    std::string resp(resp_buf, n);
+    bool ok = resp.find("200 OK") != std::string::npos || resp.find("201 Created") != std::string::npos;
+    if (!ok) {
+        spdlog::warn("NodeControlClient: command failed on port {}: {}", port, resp.substr(0, 100));
+    }
+    return ok;
+}
+
+} // namespace dmf_engine