ASP classic and Json parse [duplicate] - json

Question

This question already has an answer here:
Looping though JSON classic ASP
(1 answer)
Closed 10 months ago.
I try to get value out from model_category and others like this in the JSON file.
I use aspJSON1.19.asp and my setup is:
For Each X In oJSON.data("result")
Set this = oJSON.data("result").item(X)
For Each item in this
Response.Write item & " : " & this.item(item) & "<br>"
Next
Next
But I can't get values from items like model_category.
My JSON file contains:
{
"result": [{
"parent": "",
"skip_sync": "false",
"residual_date": "",
"residual": "0",
"sys_updated_on": "2022-04-08 07:41:11",
"request_line": "",
"sys_updated_by": "jan",
"due_in": "",
"model_category": {
"link": "https://hest.service-now.com/api/now/table/cmdb_model_category/57d5bc14c3031000b959fd251eba8fd7",
"value": "57d5bc14c3031000b959fd251eba8fd7"
},
"sys_created_on": "2021-09-28 13:31:33",
"sys_domain": {
"link": "https://hest.service-now.com/api/now/table/sys_user_group/global",
"value": "global"
},
"u_owned_by_company": {
"link": "https://hest.service-now.com/api/now/table/core_company/bff4eaf51b30201075fb7b75464bcb70",
"value": "bff4eaf51b30201075fb7b75464bcb70"
},
"disposal_reason": "",
"model": {
"link": "https://hest.service-now.com/api/now/table/cmdb_model/6a6b3f731bb72050287b7d55464bcb99",
"value": "6a6b3f731bb72050287b7d55464bcb99"
},
"u_correlation_id": "",
"u_scanned_serial_number": "93619031",
"install_date": "",
"gl_account": "",
"invoice_number": "",
"sys_created_by": "manth",
"warranty_expiration": "",
"asset_tag": "",
"depreciated_amount": "0",
"substatus": "available",
"pre_allocated": "false",
"owned_by": "",
"checked_out": "",
"display_name": "Eizo - EV2456",
"sys_domain_path": "/",
"asset_function": "",
"delivery_date": "4010-04-15 12:25:00",
"retirement_date": "",
"beneficiary": "",
"install_status": "6",
"cost_center": "",
"supported_by": "",
"assigned": "",
"purchase_date": "",
"work_notes": "",
"managed_by": "",
"sys_class_name": "alm_hardware",
"sys_id": "01beedbe1bf6f410d37d8735464bcb50",
"po_number": "6202",
"stockroom": {
"link": "https://hest.service-now.com/api/now/table/alm_stockroom/82fd1e941b8fec108d685532604bcba2",
"value": "82fd1e941b8fec108d685532604bcba2"
},
"checked_in": "",
"u_ritm_reference": {
"link": "https://hest.service-now.com/api/now/table/sc_req_item/c7561ab41b72f41075fb7b75464bcb09",
"value": "c7561ab41b72f41075fb7b75464bcb09"
},
"resale_price": "0",
"vendor": "",
"company": "",
"retired": "",
"justification": "",
"department": "",
"expenditure_type": "",
"assigned_to": "",
"depreciation_date": "",
"old_status": "",
"comments": "",
"cost": "0",
"quantity": "1",
"acquisition_method": "",
"sys_mod_count": "5",
"old_substatus": "",
"serial_number": "6677",
"sys_tags": "",
"u_warranty_start": "",
"order_date": "",
"support_group": "",
"reserved_for": "",
"due": "",
"location": {
"link": "https://hest.service-now.com/api/now/table/cmn_location/ef8b8b9b1b20b050287b7d55464bcbbf",
"value": "ef8b8b9b1b20b050287b7d55464bcbbf"
},
"lease_id": "",
"salvage_value": "0"
}]
}
Any help?

Answer 1

That's because model_category is an object (a Scripting.Dictionary), and you can't Response.Write objects directly - you would have to write another For Each loop.
Use a recursive function instead:
Sub PrintJson(item)
Dim key
If IsObject(item) Then
If item Is Nothing Then Exit Sub
If item.Count = 0 Then Exit Sub
Response.Write "<ul class=""jsonObject"">" & vbLf
For Each key In item
Response.Write "<li>" & vbLf
Response.Write Server.HTMLEncode(key) & " : "
PrintJson item(key)
Response.Write "</li>" & vbLf
Next
Response.Write "</ul>" & vbLf
ElseIf IsArray(item) Then
If UBound(item) < 0 Then Exit Sub
Response.Write "<ul class=""jsonArray"">" & vbLf
For key = 0 To UBound(item)
Response.Write "<li>" & vbLf
Response.Write Server.HTMLEncode(key) & " : "
PrintJson item(key)
Response.Write "</li>" & vbLf
Next
Response.Write "</ul>" & vbLf
ElseIf IsNull(item) Then
Response.Write "<span class=""jsonValue""><i>null</i></span>"
Else
Response.Write "<span class=""jsonValue"">"
Response.Write Server.HTMLEncode(item)
Response.Write "</span>"
End If
End Sub
Now you can do this:
Set oXMLHTTP = CreateObject("MSXML2.XMLHTTP.3.0")
oXMLHTTP.Open "GET", "https://....", False
oXMLHTTP.Send
Set oJSON = New aspJSON
oJSON.loadJSON(oXMLHTTP.responseText)
PrintJson oJSON.data
and it will print any nesting level. This is meant as a helper to visualize the content of e.g. a response from an API.
If you know the exact path to an item, and you know that this item exists (!), you can do access it directly
oJSON("result")(0)("model_category")("value")
But this will result in in an error if any of the keys do not exist on the object.