cos-cpp-sdk-v5/demo/object_op_demo/select_objec_demo.cpp

#include <stdlib.h>
#include <sys/stat.h>
#include <iostream>
#include <map>
#include <string>
#include <thread>
#include <vector>
#include "cos_api.h"
#include "cos_sys_config.h"
#include "util/auth_tool.h"

/**
 * 本样例演示了如何使用 COS C++ SDK 进行对象检索
 * 包括：对象检索
 */
using namespace qcloud_cos;

uint64_t appid = 12500000000;
std::string tmp_secret_id = "AKIDXXXXXXXX";
std::string tmp_secret_key = "1A2Z3YYYYYYYYYY";
std::string region = "ap-guangzhou";
std::string bucket_name = "examplebucket-12500000000";
std::string tmp_token = "token";

/*
 * 本方法包含调用是否正常的判断，和请求结果的输出
 * 可通过本方法判断是否请求成功，并输出结果信息
 */
void PrintResult(const qcloud_cos::CosResult& result, const qcloud_cos::BaseResp& resp) {
    if (result.IsSucc()) {
        std::cout << "Request Succ." << std::endl;
        std::cout << resp.DebugString() << std::endl;
    } else {
        std::cout << "ErrorMsg=" << result.GetErrorMsg() << std::endl;
        std::cout << "HttpStatus=" << result.GetHttpStatus() << std::endl;
        std::cout << "ErrorCode=" << result.GetErrorCode() << std::endl;
        std::cout << "ErrorMsg=" << result.GetErrorMsg() << std::endl;
        std::cout << "ResourceAddr=" << result.GetResourceAddr() << std::endl;
        std::cout << "XCosRequestId=" << result.GetXCosRequestId() << std::endl;
        std::cout << "XCosTraceId=" << result.GetXCosTraceId() << std::endl;
    }
}

/*
 * 通过参数形式初始化 CosAPI 对象
 */
qcloud_cos::CosAPI InitCosAPI() {
    qcloud_cos::CosConfig config(appid, tmp_secret_id, tmp_secret_key, region);
    config.SetTmpToken(tmp_token);  // 推荐使用临时密钥初始化 CosAPI 对象, 如果您使用永久密钥初始化 CosAPI 对象，请注释
    qcloud_cos::CosAPI cos_tmp(config);
    return cos_tmp;
}

void SelectObjectContentDemo(qcloud_cos::CosAPI& cos) {
    std::string object_name = "test.csv.gz";
    int input_file_type = CSV;                //  待检索对象的格式为CSV或者JSON
    int input_compress_type = COMPRESS_GZIP;  // 压缩类型，COMPRESS_NONE, COMPRESS_GZIP, COMPRESS_BZIP2
    int out_file_type = CSV;                  // 输出格式为CSV或者JSON

    qcloud_cos::SelectObjectContentReq req(bucket_name, object_name, input_file_type, input_compress_type, out_file_type);
    req.SetSqlExpression("Select * from COSObject");
    qcloud_cos::SelectObjectContentResp resp;
    qcloud_cos::CosResult result = cos.SelectObjectContent(req, &resp);

    std::cout << "=====================IsObjectExist=======================" << std::endl;
    PrintResult(result, resp);
    // 支持打印最终结果至终端或写入本地文件
    // resp.WriteResultToLocalFile("file_name");
    resp.PrintResult();
    std::cout << "=========================================================" << std::endl;
}

int main() {
    qcloud_cos::CosAPI cos = InitCosAPI();
    CosSysConfig::SetLogLevel((LOG_LEVEL)COS_LOG_ERR);
    SelectObjectContentDemo(cos);
}