Microsoft is giving away 50,000 FREE Microsoft Certification exam vouchers!
Enter the sweepstakes now!See when key Fabric features will launch and what’s already live, all in one place and always up to date. Explore the new Fabric roadmap
The Road Administration in Norway provides trafficdata in an web api using GraphQL (https://www.vegvesen.no/trafikkdata/api/). I have unsuccessfully tried to set up a connection and load data into a table in Power BI. It seems like web.contents returns html for the website rather than json data. I have run the query in Postman and there it returns correct json data.
I appreciate some tips that can lead me the right way:-)
This is my code:
let
uri = "https://www.vegvesen.no/trafikkdata/api/",
headers = [#"Content-Type" = "application/json"],
query = "
query counties {
areas {
counties {
number
name
}
}
}
",
source = uri & "?query=" & Uri.EscapeDataString(query),
resp = Web.Contents(source, [Headers=headers]),
json = Json.Document(resp)
in
json
Solved! Go to Solution.
Ah, never mind. Having a look at how they actually call the API reveals that this is a POST request, which means you need to stuff the query into the payload instead.
let
query = "{areas{counties{number name}}}",
uri = "https://www.vegvesen.no/trafikkdata/api/",
Source = Json.Document(Web.Contents(uri, [Headers=[#"Content-Type"="application/json"], Content=Json.FromValue([query = query])])),
#"Converted to Table" = Table.FromList(Source[data][areas][counties], Splitter.SplitByNothing(), null, null, ExtraValues.Error),
#"Expanded Column1" = Table.ExpandRecordColumn(#"Converted to Table", "Column1", {"number", "name"}, {"number", "name"})
in
#"Expanded Column1"
The problem seems to be that the website is trying to be cute, and is providing a placeholder "Loading..." page first
You would have to ignore that and fetch the next page.
Your code is also missing an important query parameter.
https://www.vegvesen.no/trafikkdata/api/?query=query%20counties%7Bareas%7Bcounties%7Bnumber%20name%7D%7D%7D&operationName=counties
Here is the "proper" Power Query code that you shoud be using.
Parameters uri and query
uri = "https://www.vegvesen.no/trafikkdata/api/"
query = "query counties{areas{counties{number name}}}"
Request
Web.Contents(uri, [Headers=[Accept="application/json"], Query=[query=query,operationName="counties"]])
@ImkeF Do you remember how to handle URI redirects in such a scenario?
Ah, never mind. Having a look at how they actually call the API reveals that this is a POST request, which means you need to stuff the query into the payload instead.
let
query = "{areas{counties{number name}}}",
uri = "https://www.vegvesen.no/trafikkdata/api/",
Source = Json.Document(Web.Contents(uri, [Headers=[#"Content-Type"="application/json"], Content=Json.FromValue([query = query])])),
#"Converted to Table" = Table.FromList(Source[data][areas][counties], Splitter.SplitByNothing(), null, null, ExtraValues.Error),
#"Expanded Column1" = Table.ExpandRecordColumn(#"Converted to Table", "Column1", {"number", "name"}, {"number", "name"})
in
#"Expanded Column1"
User | Count |
---|---|
14 | |
3 | |
2 | |
2 | |
2 |
User | Count |
---|---|
9 | |
3 | |
2 | |
2 | |
2 |