azure app insights get a part of a string from url and display it in the name column - azure

Question

I am using azure app insights and i want to parse a part of the string from url and show that part in a name column
requests
| where user_AuthenticatedId != ""
and url contains "reports" and user_AuthenticatedId == "xxx"
| project timestamp, user_AuthenticatedId, client_CountryOrRegion, client_OS, url,name
| order by timestamp asc nulls last
for example i am getting url as https://localhost:80/api/external-reports/blob/39/test 01b/false so i want to take the test 01b from this and show it in the name column.
i am not sure on how to do this.

Answer 1

There are some functions that might be helpful.
First of all, you can get the different url parts using parse_url() method. For example, given the url https://localhost:80/api/external-reports/blob/39/test 01b/false :
requests
| project parse_url(url)
output:
{"Scheme":"https","Host":"localhost","Port":"80","Path":"/api/external-reports/blob/39/test 01b/false","Username":"","Password":"","Query Parameters":{},"Fragment":""}
You can split the result even further using the split() method:
requests
| project split(parse_url(url).Path, "/")
output:
["","api","external-reports","blob","39","test 01b","false"]
To get the part you want you can use the index:
request
| project mycolumn = split(parse_url(test).Path, "/")[5]
output:
test 01b
When an index is used that is greater than the number of parts an empty result is returned. You can replace it with a value of your own using the coalesce function:
requests
| project mycolumn = coalesce(split(parse_url(test).Path, "/")[5], "unknown")
it shows unknown when the index is out of range or the part is empty.