Update all .cpp files to use .cc extension (google style)

pipeline/src/web_client/curl_web_client_get.cc

@@ -0,0 +1,75 @@
+/**
+ * @file web_client/curl_web_client_get.cc
+ * @brief CURLWebClient::Get() implementation.
+ */
+
+#include <curl/curl.h>
+
+#include <cstdint>
+#include <memory>
+#include <stdexcept>
+#include <string>
+
+#include "web_client/curl_web_client.h"
+
+using CurlHandle = std::unique_ptr<CURL, decltype(&curl_easy_cleanup)>;
+
+static CurlHandle create_handle() {
+  CURL* handle = curl_easy_init();
+  if (handle == nullptr) {
+    throw std::runtime_error(
+        "[CURLWebClient] Failed to initialize libcurl handle");
+  }
+  return CurlHandle(handle, &curl_easy_cleanup);
+}
+
+static void set_common_get_options(CURL* curl, const std::string& url) {
+  constexpr uint64_t connection_timeout = 10;
+  constexpr uint64_t request_timeout = 30;
+  curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+  curl_easy_setopt(curl, CURLOPT_USERAGENT, "biergarten-pipeline/0.1.0");
+  curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+  curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 5L);
+  curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, connection_timeout);
+  curl_easy_setopt(curl, CURLOPT_TIMEOUT, request_timeout);
+  curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "gzip");
+}
+
+// curl write callback that appends response data into a std::string
+static size_t WriteCallbackString(void* contents, const size_t size,
+                                  const size_t nmemb, void* userp) {
+  const size_t real_size = size * nmemb;
+  auto* str = static_cast<std::string*>(userp);
+  str->append(static_cast<char*>(contents), real_size);
+  return real_size;
+}
+
+std::string CURLWebClient::Get(const std::string& url) {
+  const CurlHandle curl = create_handle();
+
+  std::string response_string;
+
+  set_common_get_options(curl.get(), url);
+
+  curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, WriteCallbackString);
+  curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA, &response_string);
+
+  CURLcode res = curl_easy_perform(curl.get());
+
+  if (res != CURLE_OK) {
+    const auto error =
+        std::string("[CURLWebClient] GET failed: ") + curl_easy_strerror(res);
+    throw std::runtime_error(error);
+  }
+
+  int64_t httpCode = 0;
+  curl_easy_getinfo(curl.get(), CURLINFO_RESPONSE_CODE, &httpCode);
+
+  if (httpCode != 200) {
+    const std::string error = "[CURLWebClient] HTTP error " +
+                              std::to_string(httpCode) + " for URL " + url;
+    throw std::runtime_error(error);
+  }
+
+  return response_string;
+}