CosResult PutBucketPolicy(const PutBucketPolicyReq& req, PutBucketPolicyResp* resp)

qcloud_cos::CosConfig config("./config.json");
qcloud_cos::CosAPI cos(config);

std::string bucket_name = "examplebucket-1250000000"; // Replace it with your bucket name, which is in the format of BucketName-APPID (APPID is required). It can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.

qcloud_cos::PutBucketPolicyReq req(bucket_name);
qcloud_cos::PutBucketPolicyResp resp;
std::string bucket_policy = 
"  {"
"    \\"Statement\\": ["
"      {"
"        \\"Principal\\": {"
"          \\"qcs\\": ["
"            \\"qcs::cam::uin/100000000001:uin/100000000011\\"" // Replace with the UIN of the account to be granted the permission.
"          ]\\n"
"        },\\n"
"        \\"Effect\\": \\"allow\\","
"        \\"Action\\": ["
"          \\"cos:PutObject\\""
"        ],\\n"
"        \\"Resource\\": [" // Change it to the allowed path prefix (such as "a.jpg", "a/*", or "*"). You can determine the upload path based on your login status. (Keep in mind that using asterisks (*) could bring high risks.)
"          \\"qcs::cos:ap-guangzhou:uid/1250000000:examplebucket-1250000000/exampleobject\\""
"        ],\\n"
"        \\"Condition\\": {"
"          \\"string_equal\\": {"
"            \\"cos:x-cos-mime-limit\\": \\"image/jpeg\\""
"          }"
"        }"
"      }"
"    ],"
"    \\"Version\\": \\"2.0\\""
"  }";

req.SetBody(bucket_policy);
qcloud_cos::CosResult result = cos.PutBucketPolicy(req, &resp);

if (result.IsSucc()) {
    // ...
} else {
    // You can call the CosResult member functions to output the error information, such as requestID
} 

CosResult GetBucketPolicy(const GetBucketPolicyReq& req, GetBucketPolicyResp* resp)

qcloud_cos::CosConfig config("./config.json");
qcloud_cos::CosAPI cos(config);

std::string bucket_name = "examplebucket-1250000000"; // Replace it with your bucket name, which is in the format of BucketName-APPID (APPID is required). It can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.

qcloud_cos::GetBucketPolicyReq req(bucket_name);
qcloud_cos::GetBucketPolicyResp resp;
qcloud_cos::CosResult result = cos.GetBucketPolicy(req, &resp);

// The call is successful. You can call the resp member functions to get the return content.
if (result.IsSucc()) {
    // ...
} else {
    // You can call the CosResult member functions to output the error information, such as requestID
} 

std::string resp.GetPolicy()

CosResult DeleteBucketPolicy(const DeleteBucketPolicyReq& req, DeleteBucketPolicyResp* resp)

qcloud_cos::CosConfig config("./config.json");
qcloud_cos::CosAPI cos(config);

std::string bucket_name = "examplebucket-1250000000"; // Replace it with your bucket name, which is in the format of BucketName-APPID (APPID is required). It can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.

qcloud_cos::DeleteBucketPolicyReq req(bucket_name);
qcloud_cos::DeleteBucketPolicyResp resp;
qcloud_cos::CosResult result = cos.DeleteBucketPolicy(req, &resp);

if (result.IsSucc()) {
    // ...
} else {
    // You can call the CosResult member functions to output the error information, such as requestID
}