要在url后面加上debug=1
比如
'https://qyapi.weixin.qq.com/cgi-bin/idconvert/unionid_to_external_userid?access_token=4ijeiiw27OIf9wfQSqQBh4mF6TsXacWozwqEGBWAk1O4bzd_726yBF4b6uiH3UfMuirHw4AnsUfEdoq9HtxsOOLeJhwHO9NlzDIBYfYIHVcdffvq9pXPDZXamDTOHBdjqnuau5t0VN-eIAn82hHHpG9UhDqwFS0UIWupKXoEip2dvmXE-T7rAlxO0sVTydhQf59sT6v2asrJLTOr81IjUA&debug=1';