Introducing websocket support in router and libunit.

src/test/nxt_unit_websocket_echo.c

@@ -0,0 +1,105 @@
+
+/*
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <nxt_unit.h>
+#include <nxt_unit_request.h>
+#include <nxt_clang.h>
+#include <nxt_websocket.h>
+#include <nxt_unit_websocket.h>
+
+
+static void
+ws_echo_request_handler(nxt_unit_request_info_t *req)
+{
+    int         rc;
+    const char  *target;
+
+    rc = NXT_UNIT_OK;
+    target = nxt_unit_sptr_get(&req->request->target);
+
+    if (strcmp(target, "/") == 0) {
+        if (!nxt_unit_request_is_websocket_handshake(req)) {
+            goto notfound;
+        }
+
+        rc = nxt_unit_response_init(req, 101, 0, 0);
+        if (nxt_slow_path(rc != NXT_UNIT_OK)) {
+            goto fail;
+        }
+
+        nxt_unit_response_upgrade(req);
+        nxt_unit_response_send(req);
+
+        return;
+    }
+
+notfound:
+
+    rc = nxt_unit_response_init(req, 404, 0, 0);
+
+fail:
+
+    nxt_unit_request_done(req, rc);
+}
+
+
+static void
+ws_echo_websocket_handler(nxt_unit_websocket_frame_t *ws)
+{
+    uint8_t                  opcode;
+    ssize_t                  size;
+    nxt_unit_request_info_t  *req;
+
+    static size_t            buf_size = 0;
+    static uint8_t           *buf = NULL;
+
+    if (buf_size < ws->content_length) {
+        buf = realloc(buf, ws->content_length);
+        buf_size = ws->content_length;
+    }
+
+    req = ws->req;
+    opcode = ws->header->opcode;
+
+    if (opcode == NXT_WEBSOCKET_OP_PONG) {
+        nxt_unit_websocket_done(ws);
+        return;
+    }
+
+    size = nxt_unit_websocket_read(ws, buf, ws->content_length);
+
+    nxt_unit_websocket_send(req, opcode, ws->header->fin, buf, size);
+    nxt_unit_websocket_done(ws);
+
+    if (opcode == NXT_WEBSOCKET_OP_CLOSE) {
+        nxt_unit_request_done(req, NXT_UNIT_OK);
+    }
+}
+
+
+int
+main()
+{
+    nxt_unit_ctx_t   *ctx;
+    nxt_unit_init_t  init;
+
+    memset(&init, 0, sizeof(nxt_unit_init_t));
+
+    init.callbacks.request_handler = ws_echo_request_handler;
+    init.callbacks.websocket_handler = ws_echo_websocket_handler;
+
+    ctx = nxt_unit_init(&init);
+    if (ctx == NULL) {
+        return 1;
+    }
+
+    nxt_unit_run(ctx);
+    nxt_unit_done(ctx);
+
+    return 0;
+}