(Tcl) List Files and Folders in a SharePoint Documents Library

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This example shows how to use Chilkat's HttpCurl class to list the files and folders in the root of a SharePoint Documents document library. In Microsoft Graph, a SharePoint document library is represented as a drive. The example demonstrates how HttpCurl automatically resolves the SharePoint site name to a site ID, finds the drive ID for the Documents library, and then retrieves the children of the library's root folder.

Note: This example requires Chilkat v11.0.0 or greater.

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load ./chilkat.dll

set success 0

# This example lists the files and folders in the root of the SharePoint
# Documents document library.
# 
# In Microsoft Graph terminology, a SharePoint document library is represented
# as a "drive".  The default document library is commonly named "Documents".
# This example shows how HttpCurl can automatically resolve the needed values:
# 
#   site_name  ->  site_id
#   site_id    ->  document_library_id
# 
# After those values are known, the final request lists the children of the
# root folder in the Documents document library.

set success 0

# --------------------------------------------------------------------------------------------------------
# Before running this example, create an Azure App Registration and grant it
# the Microsoft Graph permissions required to access SharePoint.
# 
# The application will authenticate using OAuth2 Client Credentials.
# See:
# How to Create SharePoint App Registration for OAuth 2.0 Client Credentials
# --------------------------------------------------------------------------------------------------------

# Build a JSON authentication configuration.
# HttpCurl will use this information to automatically obtain OAuth2 access tokens.
set jsonAuth [new_CkJsonObject]

# Enable secret lookup.
# 
# Instead of hard-coding sensitive values such as the client ID,
# client secret, and token endpoint, secret specification strings
# are used.  Chilkat automatically retrieves the actual values from
# Windows Credential Manager (Windows) or Apple Keychain (macOS).
# 
# See:
# Secret Specification Strings
CkJsonObject_put_EnableSecrets $jsonAuth 1

set success [CkJsonObject_UpdateString $jsonAuth "oauth2.client_id" "!!sharepoint|oauth2|client_id"]
if {$success == 1} then {
    set success [CkJsonObject_UpdateString $jsonAuth "oauth2.client_secret" "!!sharepoint|oauth2|client_secret"]
}

if {$success == 1} then {
    set success [CkJsonObject_UpdateString $jsonAuth "oauth2.token_endpoint" "!!sharepoint|oauth2|token_endpoint"]
}

if {$success == 0} then {
    puts [CkJsonObject_lastErrorText $jsonAuth]
    delete_CkJsonObject $jsonAuth
    exit
}

# Request Microsoft Graph permissions that were granted to the application.
CkJsonObject_UpdateString $jsonAuth "oauth2.scope" "https://graph.microsoft.com/.default"

# ---------------------------------------------------------------------------------------------------

set curl [new_CkHttpCurl]

# Associate the OAuth2 configuration with HttpCurl.
# 
# When the request is executed, Chilkat automatically obtains an access token
# if needed and adds the Authorization: Bearer header to the HTTP request.
CkHttpCurl_SetAuth $curl $jsonAuth

# Define variables whose values are already known.
# 
# These variables are referenced in curl commands using
# {{variable_name}} substitution syntax.
CkHttpCurl_SetVar $curl "sharepoint_hostname" "example.sharepoint.com"
CkHttpCurl_SetVar $curl "site_name" "test"

# The final request needs a Microsoft Graph site ID.
# 
# Because the application only knows the SharePoint site name,
# define a helper function that can retrieve the site record.
# HttpCurl can execute this function automatically when it needs
# to resolve the site_id variable.
CkHttpCurl_AddFunction $curl "getSite" "GET https://graph.microsoft.com/v1.0/sites/root:/sites/{{site_name}}"

# Extract the "id" field from the getSite response and store it
# in the HttpCurl variable named "site_id".
CkHttpCurl_AddOutput $curl "getSite" "id" "site_id"

# The next value needed is the drive ID for the Documents document library.
# 
# This function lists the drives, also known as document libraries,
# belonging to the SharePoint site.
CkHttpCurl_AddFunction $curl "getDrives" "GET https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives"

# Extract the ID of the drive whose name is "Documents".
# 
# AddOutput2 searches an array in the JSON response.  In this case:
# 
#   response array: value
#   match field:    name
#   match value:    Documents
#   case-sensitive: true
#   output field:   id
#   variable name:  document_library_id
# 
# The result is that document_library_id will contain the drive ID
# for the Documents document library.
CkHttpCurl_AddOutput2 $curl "getDrives" "value" "name" "Documents" 1 "id" "document_library_id"

# The target Microsoft Graph request:
# 
# GET https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives/{{document_library_id}}/root/children
# 
# This lists the files and folders in the root folder of the Documents
# document library.
# 
# The {{site_id}} and {{document_library_id}} variables are not set directly
# by this program.  HttpCurl resolves them automatically by running the
# helper functions defined above.
set curlCommand "GET https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives/{{document_library_id}}/root/children"

# Execute the request.
# 
# HttpCurl examines the target request and determines that it requires
# both site_id and document_library_id.
# 
# The execution plan becomes:
# 
#   1) Execute getSite to obtain site_id.
#   2) Execute getDrives to obtain document_library_id.
#   3) Substitute both variables into the target request.
#   4) Execute the root/children request.
# 
# The final HTTP response returned by DoYourThing is always the response
# from the target request, which is the last step in the plan.
set success [CkHttpCurl_DoYourThing $curl $curlCommand]
if {$success == 0} then {
    puts [CkHttpCurl_lastErrorText $curl]
    delete_CkJsonObject $jsonAuth
    delete_CkHttpCurl $curl
    exit
}

# A successful Graph response should return HTTP 200.
# Any other status code typically indicates an authentication,
# permission, site lookup, or document library lookup error.
set statusCode [CkHttpCurl_get_StatusCode $curl]
if {$statusCode != 200} then {
    puts [CkHttpCurl_responseBodyStr $curl]
    puts "status code = $statusCode"
    delete_CkJsonObject $jsonAuth
    delete_CkHttpCurl $curl
    exit
}

# The response body contains a JSON array named "value".
# Each element represents one file or folder in the root of the
# Documents document library.
set json [new_CkJsonObject]

CkJsonObject_put_EmitCompact $json 0
CkHttpCurl_GetResponseJson $curl $json
puts [CkJsonObject_emit $json]
puts 

# Count the number of items returned in the "value" array.
# 
# This includes both files and folders.
set numFiles [CkJsonObject_SizeOfArray $json "value"]
puts "Number of files: $numFiles"
puts 

# Iterate over the files and folders returned by Microsoft Graph
# and display selected properties for each item.
set i 0
while {$i < $numFiles} {
    CkJsonObject_put_I $json $i

    puts "name: [CkJsonObject_stringOf $json {value[i].name}]"
    puts "webUrl: [CkJsonObject_stringOf $json {value[i].webUrl}]"
    puts "size: [CkJsonObject_stringOf $json {value[i].size}]"
    puts "id: [CkJsonObject_stringOf $json {value[i].id}]"
    puts "-"
    set i [expr $i + 1]
}

delete_CkJsonObject $jsonAuth
delete_CkHttpCurl $curl
delete_CkJsonObject $json