Postman http/https测试工具

restful接口的几点说明
    1）url后面添加参数，可以直接通过&符号链接起来
例如：http://192.168.18.84/axis-cgi/com/ptz.cgi?camera=1&query=position
也可以通过Params的键值对进行填充

    2）认证可以通过Authorization进行添加，根据适当的Type类型进行选择，也可以通过Header进行认证换算后填充，例如
Authorization: cm9vdDpyb290

    3）Postman指定了Connection: keep-alive属性，因此需要服务器端主动断开链接，否则会出现如下的问题: 一直提示Canceling Request,即使是收到了回复

    4）使用https进行请求的时候，如果返回异常，如下：
Could not get any response
There was an error connecting to https://192.168.58.42:8080/cs/restfull/operationRestfullApi/excuteSqlByCode.
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
Self-signed SSL certificates are being blocked:
Fix this by turning off 'SSL certificate verification' in Settings > General
Proxy configured incorrectly
Ensure that proxy is configured correctly in Settings > Proxy
Request timeout:
Change request timeout in Settings > General
解决方案： 打开settings界面，找到General界面，然后关闭SSL certificate verification即可，是不需要认证证书