[增加文件操作测试和异步HTTP客户端功能]: 增加文件操作测试和异步HTTP客户端功能

- 在 `Curl` 目录下新增 `file_utils.hpp` 文件，提供文件创建、删除和断言文件内容等辅助函数
- 修改 `CMakeLists.txt` 文件，增加 `httpclient_file_test` 和 `httpclient_async_file_test` 两个可执行文件的编译配置，并链接 `GTest` 相关库
- 修改 `httpclient.cc` 和 `httpclient.hpp` 文件，增加 `download`、`upload_put` 和 `upload_post` 方法，实现文件下载和上传功能
- 修改 `httpclient_async.cc` 和 `httpclient_async.hpp` 文件，增加 `download`、`upload_put` 和 `upload_post` 方法，实现异步文件下载和上传功能
- 新增 `httpclient_file_test.cc` 文件，编写文件上传和下载的测试用例，使用 `file_utils.hpp` 中的辅助函数进行测试
- 新增 `httpclient_async_file_test.cc` 文件，编写异步文件上传和下载的测试用例，使用 `file_utils.hpp` 中的辅助函数进行测试

Author: RealChuan

Curl/CMakeLists.txt

@@ -4,6 +4,20 @@ target_link_libraries(tcpclient_test PRIVATE CURL::libcurl)
 add_executable(httpclient_test httpclient_test.cc httpclient.cc httpclient.hpp)
 target_link_libraries(httpclient_test PRIVATE CURL::libcurl)
 
+add_executable(httpclient_file_test file_utils.hpp httpclient_file_test.cc
+                                    httpclient.cc httpclient.hpp)
+target_link_libraries(
+  httpclient_file_test PRIVATE CURL::libcurl GTest::gtest GTest::gtest_main
+                               GTest::gmock GTest::gmock_main)
+
 add_executable(httpclient_async_test httpclient_async_test.cc
                                      httpclient_async.cc httpclient_async.hpp)
 target_link_libraries(httpclient_async_test PRIVATE CURL::libcurl)
+
+add_executable(
+  httpclient_async_file_test file_utils.hpp httpclient_async_file_test.cc
+                             httpclient_async.cc httpclient_async.hpp)
+target_link_libraries(
+  httpclient_async_file_test
+  PRIVATE CURL::libcurl GTest::gtest GTest::gtest_main GTest::gmock
+          GTest::gmock_main)

Curl/file_utils.hpp

@@ -0,0 +1,38 @@
+#include <gtest/gtest.h>
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+
+void createFile(const std::string &filename, const std::string &data)
+{
+    auto filepath = std::filesystem::current_path() / filename;
+    std::ofstream file(filepath);
+    if (!file.is_open()) {
+        std::cerr << "Cannot open the file: " << filepath << std::endl;
+        return;
+    }
+    file << data;
+    file.close();
+}
+
+void removeFile(const std::string &filename)
+{
+    auto filepath = std::filesystem::current_path() / filename;
+    if (std::filesystem::exists(filepath)) {
+        std::filesystem::remove(filepath);
+    }
+}
+
+void assertFileData(const std::string &filename, const std::string &data)
+{
+    auto filepath = std::filesystem::current_path() / filename;
+    std::ifstream file(filepath);
+    if (!file.is_open()) {
+        std::cerr << "Cannot open the file: " << filepath << std::endl;
+        return;
+    }
+    std::string fileData((std::istreambuf_iterator<char>(file)), (std::istreambuf_iterator<char>()));
+    file.close();
+    EXPECT_EQ(fileData, data);
+}