HttpLib使用

cpp-httplib使用

https://codechina.csdn.net/mrbaolong/cpp-httplib.git

如何使用httplib 发送GET请求，同时设置请求参数和Headers，并同时打印请求数据的进度。

Get请求

using Progress = 
std::function<bool(uint64_t current, uint64_t total)>;

using ResponseHandler = 
std::function<bool(const Response &response)>;

using ContentReceiver =
std::function<bool(const char *data, size_t data_length)>;


Result Get(
	const char *path, 
	const Params &params, 
	const Headers &headers,
	ResponseHandler response_handler,
	ContentReceiver content_receiver,
	Progress progress = nullptr
);

client.Get(
"/api/Model/GetAllElementsInView", //请求API
params ,//请求参数
headers,//设置请求头
 [&](const httplib::Response& response) {},// 消息回复状态函数
 [&](const char* data, size_t data_length){},//回复数据处理函数
 [&](uint64_t len, uint64_t total) {}//回复数据进度处理函数
 );

#include "httplib.h"
#include "rapidjson/document.h"
#include "OperFile.h"

int main()
{
    //SPDLOG_LOGGER_ERROR
    std::shared_ptr<spdlog::logger> pLogger = spdlog::default_logger();
    SPDLOG_LOGGER_INFO(pLogger, "Directories: {} ", H3DMain_DATA_DIR);
  
    
    const std::filesystem::path RootPath = H3DMain_DATA_DIR;
    const std::filesystem::path ElementPath = RootPath / "Elements.json";
    const std::filesystem::path MaterialPath = RootPath / "Materials.json";
    const std::filesystem::path pngPath = RootPath / "texture";
    const std::filesystem::path ctmPath = RootPath / "ctm";

    const std::filesystem::path dbName = RootPath / "Test.H3D";
    H3DDB::H3DSqliteDB db(pLogger, dbName.string()); 
   
    httplib::Client cli("http://bimcomposer.probim.cn");

    httplib::Headers headers;
    headers.insert({"Accept","text/html,application/xhtml+xml,application/xml;"});
    headers.insert({"User-Agent","Mozilla/5.0"});
 

    httplib::Params params;
    params.insert({"ProjectID","7d96928d-5add-45cb-a139-2c787141e50d"});
    params.insert({"ModelID","71684978-dff5-441b-a653-e1b19e02c878" });
    params.insert({"VersionNO",""});
    params.insert({"ViewID","228874"});
    std::string body;
    cli.set_keep_alive(true);
    ///api/Model/GetAllElementsInView
    auto result = cli.Get("/api/Model/GetAllElementsInView",params ,headers, [&](const httplib::Response& response) {
        if (response.status == 200) {
            SPDLOG_LOGGER_INFO(pLogger, "Loading Elements ......");
        }
        else {
            SPDLOG_LOGGER_ERROR(pLogger, "Loading Elements Failed! Status Code:{}.",response.status);
            return false;
        }
        return true; // return 'false' if you want to cancel the request.
    }, [&](const char* data, size_t data_length) {
        body.append(data, data_length);
        return true; // return 'false' if you want to cancel the request.
    }, [&](uint64_t len, uint64_t total) {
        SPDLOG_LOGGER_INFO(pLogger, " {} / {} bytes = > {} % complete.",
            len, total,
            (int)(len * 100 / total));
        uint64_t per = (int)(len * 100 / total);
        if (per >= 100) {
            gsl::span<std::byte> data(reinterpret_cast<std::byte*>(body.data()), body.size());
            writeFile(ElementPath, data);

        }
        return true; // return 'false' if you want to cancel the request.
    });
  

    return 0;
}

tips

使用CMakeLists.txt 添加预定义宏。

target_compile_definitions(
    H3DMain
    PRIVATE
        H3DMain_DATA_DIR=\"${PROJECT_SOURCE_DIR}/Data\"
)