#!/bin/bash
username="example_username"
apiKey="example_apiKey"
date=`env LANG="en_US.UTF-8" date -u "+%a, %d %b %Y %H:%M:%S GMT"`
password=`echo -en "$date" | openssl dgst -sha1 -hmac $apiKey -binary | openssl enc -base64`
curl -i --url "https://open.chinanetcenter.com/api/certificate/{certificateId}/content" \
-X "GET" \
-u "$username:$password" \
-H "Date: $date" \
-H "Accept: application/json" \
-H "Content-Type:application/json"

HTTP/1.1 200 OK
Date: Sun, 05 May 2019 09:08:53 GMT
Content-Type: application/json;charset=utf-8
x-cnc-request-id: 83bbebc7-2c95-47d7
{"code":"0",
"message":"success",
"data":{"certificateId";123456,
        "certificate":"-----BEGIN CERTIFICATE-----……-----END CERTIFICATE-----"
        }
}

#!/bin/bash
username="example_username"
apiKey="example_apiKey"
date=`env LANG="en_US.UTF-8" date -u "+%a, %d %b %Y %H:%M:%S GMT"`
password=`echo -en "$date" | openssl dgst -sha1 -hmac $apiKey -binary | openssl enc -base64`
curl -i --url "https://open.chinanetcenter.com/api/certificate/{certificateId}/content" \
-X "GET" \
-u "$username:$password" \
-H "Date: $date" \
-H "Accept: application/xml" \
-H "Content-Type:application/xml"

HTTP/1.1 200 OK
Date: Sun, 05 May 2019 09:08:53 GMT
Content-Type: application/xml;charset=utf-8
x-cnc-request-id: 83bbebc7-2c95-47d7
 
<?xml version="1.0" encoding="UTF-8"?>
<response>
    <code>0</code>
    <message>success</message>
    <data>
        <certificate>
            <certificateId>123456</certificateId>
            <certificate>-----BEGIN CERTIFICATE-----……-----END CERTIFICATE-----</certificate>
        </certificate>
    </data>
</response>