正则表达式如何过滤问号

Question

我想从如下内容中提取url:

{"code": 0, "data": {"cdnFileUrl": "http://download.example.com.cn/download/product/mi/rules/example_url_201902123.pkg", "code": 0, "message": "success", "packageVersion": "20190219141705"}, "message": "success"}

使用如下命令可以得到正确结果：
cat info1.txt | grep -Po '"cdnFileUrl": "[0-9a-zA-Z/-:._]+"' | awk -F'"' '{ print $(NF-1) }'

http://download.example.com.cn/download/product/mi/rules/example_url_201902123.pkg

可是现在对接的部门更改了连接形式，在链接中加了个问号，我搜了下问号应该要特殊处理，但是不知道如何搞，更改后的信息如下：

{"code": 0, "data": {"cdnFileUrl": "http://download.example.com.cn/download/product/mi/rules/example_url_201902123.pkg?secret3u4o3dbhj", "code": 0, "message": "success", "packageVersion": "20190219141705"}, "message": "success"}

那么如何提取出来

http://download.example.com.cn/download/product/mi/rules/example_url_201902123.pkg?secret3u4o3dbhj

Answer 1

# cat info1.txt | awk -F'"' '{for(i=1;i<=NF;i++){if($i ~ /http:.?/)print $i}}'
http://download.example.com.cn/download/product/mi/rules/example_url_201902123.pkg?secret3u4o3dbhj

Answer 2

加上?字符

cat info1.txt | grep -Po '"cdnFileUrl": "[0-9a-zA-Z/-:._?]+"' | awk -F'"' '{ print $(NF-1) }'

Answer 3

echo {"code": 0, "data": {"cdnFileUrl": "http://download.example.com.cn/download/product/mi/rules/example_url_201902123.pkg?secret3u4o3dbhj", "code": 0, "message": "success", "packageVersion": "20190219141705"}, "message": "success"}|awk '{print $5}'|sed 's/,$//g'