structure cleanup: move libcurl utilities to other_tools...

...in order to not include unwanted dependencies in just proper.
As the whole other_tools folder is meant to be excluded from
bootstrapping, also remove the bootstrap guards.

1 files changed, 151 insertions, 0 deletions

diff --git a/src/other_tools/utils/curl_easy_handle.cpp b/src/other_tools/utils/curl_easy_handle.cpp
new file mode 100644
index 00000000..29e7670e
--- /dev/null
+++ b/src/other_tools/utils/curl_easy_handle.cpp
@@ -0,0 +1,151 @@
+// Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/other_tools/utils/curl_easy_handle.hpp"
+
+#include <fstream>
+
+#include "src/buildtool/file_system/file_system_manager.hpp"
+#include "src/buildtool/logging/logger.hpp"
+
+extern "C" {
+#include "curl/curl.h"
+}
+
+void curl_easy_closer(gsl::owner<CURL*> curl) {
+    curl_easy_cleanup(curl);
+}
+
+auto CurlEasyHandle::Create() noexcept -> std::shared_ptr<CurlEasyHandle> {
+    try {
+        auto curl = std::make_shared<CurlEasyHandle>();
+        auto* handle = curl_easy_init();
+        if (handle == nullptr) {
+            return nullptr;
+        }
+        curl->handle_.reset(handle);
+        return curl;
+    } catch (std::exception const& ex) {
+        Logger::Log(LogLevel::Error,
+                    "create curl easy handle failed with:\n{}",
+                    ex.what());
+        return nullptr;
+    }
+}
+
+auto CurlEasyHandle::EasyWriteToFile(gsl::owner<char*> data,
+                                     size_t size,
+                                     size_t nmemb,
+                                     gsl::owner<void*> userptr)
+    -> std::streamsize {
+    auto actual_size = static_cast<std::streamsize>(size * nmemb);
+    auto* file = static_cast<std::ofstream*>(userptr);
+    file->write(data, actual_size);  // append chunk
+    return actual_size;
+}
+
+auto CurlEasyHandle::EasyWriteToString(gsl::owner<char*> data,
+                                       size_t size,
+                                       size_t nmemb,
+                                       gsl::owner<void*> userptr)
+    -> std::streamsize {
+    size_t actual_size = size * nmemb;
+    (static_cast<std::string*>(userptr))->append(data, actual_size);
+    return static_cast<std::streamsize>(actual_size);
+}
+
+auto CurlEasyHandle::DownloadToFile(
+    std::string const& url,
+    std::filesystem::path const& file_path) noexcept -> int {
+    try {
+        // set URL
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_URL, url.c_str());
+
+        // ensure redirects are allowed, otherwise it might simply read empty
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_FOLLOWLOCATION, 1);
+
+        // set callback for writing to file
+        std::ofstream file(file_path.c_str(), std::ios::binary);
+
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_WRITEFUNCTION, EasyWriteToFile);
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(
+            handle_.get(), CURLOPT_WRITEDATA, static_cast<void*>(&file));
+
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_VERBOSE, 1);
+
+        // perform download
+        auto res = curl_easy_perform(handle_.get());
+
+        // close file
+        file.close();
+
+        // check result
+        if (res != CURLE_OK) {
+            // cleanup failed downloaded file, if created
+            [[maybe_unused]] auto tmp_res =
+                FileSystemManager::RemoveFile(file_path);
+        }
+        return res;
+    } catch (std::exception const& ex) {
+        Logger::Log(LogLevel::Error,
+                    "curl download to file failed with:\n{}",
+                    ex.what());
+        return 1;
+    }
+}
+
+auto CurlEasyHandle::DownloadToString(std::string const& url) noexcept
+    -> std::optional<std::string> {
+    try {
+        // set URL
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_URL, url.c_str());
+
+        // ensure redirects are allowed, otherwise it might simply read empty
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_FOLLOWLOCATION, 1);
+
+        // set callback for writing to string
+        std::string content{};
+
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(
+            handle_.get(), CURLOPT_WRITEFUNCTION, EasyWriteToString);
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(
+            handle_.get(), CURLOPT_WRITEDATA, static_cast<void*>(&content));
+
+        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-vararg)
+        curl_easy_setopt(handle_.get(), CURLOPT_VERBOSE, 1);
+
+        // perform download
+        auto res = curl_easy_perform(handle_.get());
+
+        // check result
+        if (res != CURLE_OK) {
+            return std::nullopt;
+        }
+        return content;
+    } catch (std::exception const& ex) {
+        Logger::Log(LogLevel::Error,
+                    "curl download to string failed with:\n{}",
+                    ex.what());
+        return std::nullopt;
+    }
+}