C客户端调用带有libwebsockets的IBM-WATSON API

Question

i'am使用libwebsockets库创建一个C客户端，将IBM- WATSON语音称为文本服务器。因此，我已经使用了Minimal-ws-client-rx示例https://github.com/warmcat/warmcat/libwebsockets/blob/master/minimal-examples/ws-client/minimal-ws-ws-ws-ws-client-client-rient-rx/minimal-ws-ws-cleient。当我尝试运行代码时，它给了我：

注意：默认的创建客户端SSL上下文 警告：LWS_CLIENT_HANDSHAKE：不良HTTP响应'401' err：client_connection_error：HS：WS升级未经授权 但是，当我将i.port更改为80时，错误是：

注意：默认的创建客户端SSL上下文 err：client_connection_error：超时等待SSL用户：完成失败

整个代码是：

/* * LWS-WIMAL-WS-CLIENT * *版权（C）2018 Andy Green * *此文件可在Creative Commons CC0 1.0下提供 *普遍的公共领域奉献。 * *这证明了使用LWS的最小WS客户端。 * *它连接到https://libwebsockets.org/并制作 * WSS连接到那里的愚蠢提示协议。尽管 *连接，它打印了它发送的数字 *愚蠢的灌溉协议。 */

#include <libwebsockets.h>
#include <string.h>
#include <signal.h>
static int interrupted, rx_seen, test; static struct lws *client_wsi;
static int callback_dumb_increment(struct lws *wsi, enum lws_callback_reasons reason,
          void *user, void *in, size_t len) {   switch (reason) {
    /* because we are protocols[0] ... */   case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:      lwsl_err("CLIENT_CONNECTION_ERROR: %sn",
             in ? (char *)in : "(null)");       client_wsi = NULL;      break;
    case LWS_CALLBACK_CLIENT_ESTABLISHED:       lwsl_user("%s: establishedn", __func__);       break;
    case LWS_CALLBACK_CLIENT_RECEIVE:       lwsl_user("RX: %sn", (const char
*)in);      rx_seen++;      if (test && rx_seen == 10)          interrupted = 1;        break;
    case LWS_CALLBACK_CLIENT_CLOSED:        client_wsi = NULL;      break;
    default:        break;  }
    return lws_callback_http_dummy(wsi, reason, user, in, len); }
static const struct lws_protocols protocols[] = {   {       "dumb-increment-protocol",      callback_dumb_increment,        0,      0,  },  { NULL, NULL, 0, 0 } };
static void sigint_handler(int sig) {   interrupted = 1; }
int main(int argc, const char **argv) {     struct lws_context_creation_info info;  struct lws_client_connect_info i;   struct lws_context *context;    const char *p;  int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE        /* for LLL_ verbosity above NOTICE to be built into lws, lws         * must have been configured with -DCMAKE_BUILD_TYPE=DEBUG       * instead of =RELEASE */       /* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */      /* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */      /* | LLL_DEBUG */;
    signal(SIGINT, sigint_handler);     if ((p = lws_cmdline_option(argc, argv, "-d")))         logs = atoi(p);
    test = !!lws_cmdline_option(argc, argv, "-t");
    lws_set_log_level(logs, NULL);  lwsl_user("LWS minimal ws client rx [-d <logs>] [--h2] [-t (test)]n");
    memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */    info.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;    info.port = CONTEXT_PORT_NO_LISTEN; /* we do not run any server */  info.protocols
= protocols;
#if defined(LWS_WITH_MBEDTLS)   /*   * OpenSSL uses the system trust store.  mbedTLS has to be told which    * CA to trust explicitly.   */         //info.client_ssl_ca_filepath = "./libwebsockets.org.cer";
        info.client_ssl_ca_filepath = "/home/wafa/stt/*watsonplatformnet.crt";
#endif
    context = lws_create_context(&info);    if (!context) {         lwsl_err("lws init failedn");      return 1;   }
    memset(&i, 0, sizeof i); /* otherwise uninitialized garbage */  i.context = context;    i.port = 443;   i.address = "gateway-lon.watsonplatform.net";   i.path = "/speech-to-text/api/v1/recognize?apikey:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";  //i.address = "libwebsockets.org";  i.host = i.address;     i.origin = i.address;   i.ssl_connection = LCCSCF_USE_SSL;  i.protocol = protocols[0].name; /* "dumb-increment-protocol" */     i.pwsi = &client_wsi;
    if (lws_cmdline_option(argc, argv, "--h2"))         i.alpn = "h2";
    lws_client_connect_via_info(&i);
    while (n >= 0 && client_wsi && !interrupted)        n = lws_service(context, 1000);
    lws_context_destroy(context);
    lwsl_user("Completed %sn", rx_seen > 10 ? "OK" : "Failed");
    return rx_seen > 10; }

Answer 1

您确实需要显示您使用的代码，以连接到语音到文本服务而不是基于它的代码，因为这将是您拥有编码的代码错误。在没有它的情况下，我只能推测您可能做错了什么。

数字1：您应该连接到看起来像Web套接字地址而不是HTTP地址的内容。例如。

wss：//stream.watsonplatform.net/speech-to-text/api/v1/recognize

但带有伦敦端点地址。