From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 21 Apr 2024 13:54:28 +0200
Subject: Adding upstream version 18.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../opentelemetry-cpp/examples/http/client.cc      | 95 ++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/jaegertracing/opentelemetry-cpp/examples/http/client.cc

(limited to 'src/jaegertracing/opentelemetry-cpp/examples/http/client.cc')

diff --git a/src/jaegertracing/opentelemetry-cpp/examples/http/client.cc b/src/jaegertracing/opentelemetry-cpp/examples/http/client.cc
new file mode 100644
index 000000000..91161e221
--- /dev/null
+++ b/src/jaegertracing/opentelemetry-cpp/examples/http/client.cc
@@ -0,0 +1,95 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#include "opentelemetry/ext/http/client/http_client_factory.h"
+#include "opentelemetry/ext/http/common/url_parser.h"
+#include "opentelemetry/trace/experimental_semantic_conventions.h"
+#include "tracer_common.h"
+
+namespace
+{
+
+using namespace opentelemetry::trace;
+namespace http_client = opentelemetry::ext::http::client;
+namespace context     = opentelemetry::context;
+namespace nostd       = opentelemetry::nostd;
+
+void sendRequest(const std::string &url)
+{
+  auto http_client = http_client::HttpClientFactory::CreateSync();
+
+  // start active span
+  StartSpanOptions options;
+  options.kind = SpanKind::kClient;  // client
+  opentelemetry::ext::http::common::UrlParser url_parser(url);
+
+  std::string span_name = url_parser.path_;
+  auto span             = get_tracer("http-client")
+                  ->StartSpan(span_name,
+                              {{OTEL_GET_TRACE_ATTR(AttrHttpUrl), url_parser.url_},
+                               {OTEL_GET_TRACE_ATTR(AttrHttpScheme), url_parser.scheme_},
+                               {OTEL_GET_TRACE_ATTR(AttrHttpMethod), "GET"}},
+                              options);
+  auto scope = get_tracer("http-client")->WithActiveSpan(span);
+
+  // inject current context into http header
+  auto current_ctx = context::RuntimeContext::GetCurrent();
+  HttpTextMapCarrier<http_client::Headers> carrier;
+  auto prop = context::propagation::GlobalTextMapPropagator::GetGlobalPropagator();
+  prop->Inject(carrier, current_ctx);
+
+  // send http request
+  http_client::Result result = http_client->Get(url, carrier.headers_);
+  if (result)
+  {
+    // set span attributes
+    auto status_code = result.GetResponse().GetStatusCode();
+    span->SetAttribute(OTEL_GET_TRACE_ATTR(AttrHttpStatusCode), status_code);
+    result.GetResponse().ForEachHeader(
+        [&span](nostd::string_view header_name, nostd::string_view header_value) {
+          span->SetAttribute("http.header." + std::string(header_name.data()), header_value);
+          return true;
+        });
+
+    if (status_code >= 400)
+    {
+      span->SetStatus(StatusCode::kError);
+    }
+  }
+  else
+  {
+    span->SetStatus(
+        StatusCode::kError,
+        "Response Status :" +
+            std::to_string(
+                static_cast<typename std::underlying_type<http_client::SessionState>::type>(
+                    result.GetSessionState())));
+  }
+  // end span and export data
+  span->End();
+}
+
+}  // namespace
+
+int main(int argc, char *argv[])
+{
+  initTracer();
+  constexpr char default_host[]   = "localhost";
+  constexpr char default_path[]   = "/helloworld";
+  constexpr uint16_t default_port = 8800;
+  uint16_t port;
+
+  // The port the validation service listens to can be specified via the command line.
+  if (argc > 1)
+  {
+    port = atoi(argv[1]);
+  }
+  else
+  {
+    port = default_port;
+  }
+
+  std::string url = "http://" + std::string(default_host) + ":" + std::to_string(port) +
+                    std::string(default_path);
+  sendRequest(url);
+}
-- 
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