Classic ASP Requires Chilkat v11.7.0+
Box: Set Up Reusable HttpCurl Requests and Outputs

Register searchFolder and searchFile once, with deferred folder_name and file_name output rules. This review example resolves a folder directly under root and a file directly inside it. The download operation requires exactly one search result at each step and validates exact names and parent IDs. Registration and ExaminePlan send no requests. Other Box examples still have their existing standalone setups.
See the Box API guide for setup and the complete workflow.
Chilkat Classic ASP Downloads

Download Chilkat for Classic ASP
Classic ASP
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<%
success = 0

'  Requires Chilkat 11.7.0 or later and a previously unlocked Chilkat bundle.
'  See Global Unlock Sample.
'  Guide: Box API Guide.

success = 0

'  BEGIN ONE-TIME SETUP
'  Requires Chilkat 11.7.0. Registration sends no requests.
'  Run this once and keep the SAME HttpCurl object for later downloads.
'  This focused setup searches for a root folder and a file directly inside it.
set curl = Server.CreateObject("Chilkat.HttpCurl")
curl.SetVar "access_token","BOX_ACCESS_TOKEN"
set setupCommand = Server.CreateObject("Chilkat.StringBuilder")

'  searchFolder: Box searches names; quotes request a phrase match.
success = setupCommand.SetString("curl -X GET ""https://api.box.com/2.0/search?query={{folder_query}}&type=folder&content_types=name&fields=id,type,name,parent&limit=2"" -H ""Authorization: Bearer ACCESS_TOKEN""")
setupReplacements = setupCommand.Replace("ACCESS_TOKEN",curl.GetVar("access_token"))
success = curl.AddFunction("searchFolder",setupCommand.GetAsString())
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

'  Deferred selection: folder_name need not be set during setup.
success = curl.AddOutput2("searchFolder","entries","name","{{folder_name}}",1,"id","folder_id")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

success = curl.AddOutput2("searchFolder","entries","name","{{folder_name}}",1,"name","folder_result_name")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

success = curl.AddOutput2("searchFolder","entries","name","{{folder_name}}",1,"parent.id","folder_parent_id")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

success = curl.AddOutput("searchFolder","total_count","folder_search_count")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

'  searchFile: Box searches names; quotes request a phrase match.
success = setupCommand.SetString("curl -X GET ""https://api.box.com/2.0/search?query={{file_query}}&type=file&content_types=name&fields=id,type,name,parent&limit=2&ancestor_folder_ids={{folder_id}}"" -H ""Authorization: Bearer ACCESS_TOKEN""")
setupReplacements = setupCommand.Replace("ACCESS_TOKEN",curl.GetVar("access_token"))
success = curl.AddFunction("searchFile",setupCommand.GetAsString())
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

'  Deferred selection: file_name need not be set during setup.
success = curl.AddOutput2("searchFile","entries","name","{{file_name}}",1,"id","file_id")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

success = curl.AddOutput2("searchFile","entries","name","{{file_name}}",1,"name","file_result_name")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

success = curl.AddOutput2("searchFile","entries","name","{{file_name}}",1,"parent.id","file_parent_id")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

success = curl.AddOutput("searchFile","total_count","file_search_count")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

'  END ONE-TIME SETUP
'  Search is indexed: newly uploaded/renamed items may not appear immediately.
'  Search matches phrases, not exact strings, and ancestor filtering includes
'  subfolders. The operation validates counts, exact names, and immediate parents.
'  limit=2 is enough to demonstrate an ambiguous search; total_count covers all
'  results, not just this page. This introductory example requires exactly one
'  search result at each step and does not select among multiple candidates.

'  BEGIN OPERATION -- use the previously configured object.
'  Human-readable inputs. No resource IDs are supplied by the caller.
folderName = "images"
fileName = "penguins.jpg"
'  Encode the quoted search queries separately from the literal output filters.
'  In this build, URL variable substitution does not encode '&' in a name.
set queryText = Server.CreateObject("Chilkat.StringBuilder")
success = queryText.SetString("""")
success = queryText.Append(folderName)
success = queryText.Append("""")
curl.SetVar "folder_query",queryText.GetEncoded("url","utf-8")
success = queryText.SetString("""")
success = queryText.Append(fileName)
success = queryText.Append("""")
curl.SetVar "file_query",queryText.GetEncoded("url","utf-8")
If (curl.GetVar("folder_name") <> folderName) Then
    curl.ClearVar "folder_id"
    curl.ClearVar "folder_result_name"
    curl.ClearVar "folder_parent_id"
    curl.ClearVar "folder_search_count"
    curl.ClearVar "file_id"
    curl.ClearVar "file_result_name"
    curl.ClearVar "file_parent_id"
    curl.ClearVar "file_search_count"
    curl.SetVar "folder_name",folderName
End If

If (curl.GetVar("file_name") <> fileName) Then
    curl.ClearVar "file_id"
    curl.ClearVar "file_result_name"
    curl.ClearVar "file_parent_id"
    curl.ClearVar "file_search_count"
    curl.SetVar "file_name",fileName
End If

'  With unchanged names, cached IDs and validation fields can be reused.
'  Clear the corresponding cached fields to refresh after a remote rename/move.
'  Examine the plan without running any HTTP requests.
set setupPlan = Server.CreateObject("Chilkat.JsonObject")
setupPlan.EmitCompact = 0
set authorizedCommand1 = Server.CreateObject("Chilkat.StringBuilder")
success = authorizedCommand1.SetString("curl -X GET ""https://api.box.com/2.0/files/{{file_id}}/content"" -H ""Authorization: Bearer {{access_token}}"" -L")
headerReplacement1 = authorizedCommand1.Replace("{{access_token}}",curl.GetVar("access_token"))
success = curl.ExaminePlan(authorizedCommand1.GetAsString(),setupPlan)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( curl.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( setupPlan.Emit()) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Keep this HttpCurl object for the search-based download operation.") & "</pre>"

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