Unicode C Requires Chilkat v11.0.0+
Unicode C
SharePoint -- Download Newer Files
See more SharePoint Examples
Demonstrates how to download all files from a SharePoint folder that are newer than the local files.Chilkat Unicode C Downloads
#include <C_CkHttpW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkFileAccessW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkDateTimeW.h>
void ChilkatSample(void)
{
BOOL success;
HCkHttpW http;
HCkStringBuilderW sbJson;
HCkFileAccessW fac;
HCkJsonObjectW json;
int numFiles;
HCkDateTimeW lastModRemote;
HCkDateTimeW lastModLocal;
HCkStringBuilderW localPath;
HCkStringBuilderW fileUrl;
int i;
const wchar_t *filename;
const wchar_t *sLastModified;
BOOL bDownload;
int numSeconds;
success = FALSE;
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// -------------------------------------------------------------------------
// The following comments apply to SharePoint Windows classic authentication.
// -------------------------------------------------------------------------
// For example, imagine our SharePoint endpoint is https://xyzoffice.mycompany.com/
// The SHAREPOINT_NTLM_DOMAIN would be "mycompany.com"
// The SHAREPOINT_HTTPS_DOMAIN would be "xyzoffice.mycompany.com"
// Also, the SHAREPOINT_USERNAME would be just the name, not a full email address.
// for example, "chilkat" instead of "chilkat@mycompany.com"
http = CkHttpW_Create();
// If SharePoint Windows classic authentication is used, then set the
// Login, Password, LoginDomain, and NtlmAuth properties.
CkHttpW_putLogin(http,L"SHAREPOINT_USERNAME");
CkHttpW_putPassword(http,L"SHAREPOINT_PASSWORD");
CkHttpW_putLoginDomain(http,L"SHAREPOINT_NTLM_DOMAIN");
CkHttpW_putNtlmAuth(http,TRUE);
// -------------------------------------------------------------------------
// The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
// If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
// establish the cookie as shown at SharePoint Online Authentication
// -------------------------------------------------------------------------
// First we'll download a list of all the files in the /Documents folder.
// This provides the names and last-modified date/times of the files located
// on the SharePoint server.
CkHttpW_putAccept(http,L"application/json;odata=verbose");
CkHttpW_putAcceptCharset(http,L"utf-8");
sbJson = CkStringBuilderW_Create();
success = CkHttpW_QuickGetSb(http,L"https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files",sbJson);
if (success == FALSE) {
wprintf(L"%s\n",CkHttpW_lastErrorText(http));
CkHttpW_Dispose(http);
CkStringBuilderW_Dispose(sbJson);
return;
}
// Before proceeding, make sure the local directory where we'll be downloading files exists.
fac = CkFileAccessW_Create();
CkFileAccessW_DirEnsureExists(fac,L"qa_output/sharepoint/Documents");
// OK.. load the JSON and iterate over each file
json = CkJsonObjectW_Create();
CkJsonObjectW_LoadSb(json,sbJson);
numFiles = CkJsonObjectW_SizeOfArray(json,L"d.results");
wprintf(L"Number of Files in the SharePoint /Documents folder = %d\n",numFiles);
lastModRemote = CkDateTimeW_Create();
lastModLocal = CkDateTimeW_Create();
localPath = CkStringBuilderW_Create();
fileUrl = CkStringBuilderW_Create();
i = 0;
while (i < numFiles) {
CkJsonObjectW_putI(json,i);
filename = CkJsonObjectW_stringOf(json,L"d.results[i].Name");
sLastModified = CkJsonObjectW_stringOf(json,L"d.results[i].TimeLastModified");
wprintf(L"%d: %s (%s)\n",i + 1,filename,sLastModified);
CkDateTimeW_SetFromTimestamp(lastModRemote,sLastModified);
bDownload = FALSE;
// Check to see if the local file exists. If not, then download.
CkStringBuilderW_SetString(localPath,L"qa_output/sharepoint/Documents/");
CkStringBuilderW_Append(localPath,filename);
if (CkFileAccessW_FileExists(fac,CkStringBuilderW_getAsString(localPath)) != TRUE) {
wprintf(L"This file does not exist locally.\n");
bDownload = TRUE;
}
else {
// Get the local file's date time and compare with the remote file date/time.
CkDateTimeW_SetFromTimestamp(lastModLocal,CkFileAccessW_getFileTimeStr(fac,CkStringBuilderW_getAsString(localPath),0));
// Get the difference in seconds between the local and remote last-modified times.
// if the return value is negative, then the caller's time is
// older than the argument. (in this case, a negative return value means
// the local file is older than the remote file.
// Note: The DiffSeconds method was found to be missing in the Chilkat .NET build
// (and possibly in other builds). It will be present in the v9.5.0.67 release and later.
numSeconds = CkDateTimeW_DiffSeconds(lastModLocal,lastModRemote);
if (numSeconds < 0) {
wprintf(L"The local file is older than the remote file.\n");
bDownload = TRUE;
}
}
if (bDownload == TRUE) {
CkStringBuilderW_SetString(fileUrl,L"https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files('");
CkStringBuilderW_Append(fileUrl,filename);
CkStringBuilderW_Append(fileUrl,L"')/$value");
wprintf(L"Downloading %s\n",filename);
success = CkHttpW_Download(http,CkStringBuilderW_getAsString(fileUrl),CkStringBuilderW_getAsString(localPath));
if (success == FALSE) {
wprintf(L"%s\n",CkHttpW_lastErrorText(http));
CkHttpW_Dispose(http);
CkStringBuilderW_Dispose(sbJson);
CkFileAccessW_Dispose(fac);
CkJsonObjectW_Dispose(json);
CkDateTimeW_Dispose(lastModRemote);
CkDateTimeW_Dispose(lastModLocal);
CkStringBuilderW_Dispose(localPath);
CkStringBuilderW_Dispose(fileUrl);
return;
}
// Set the local file's last-modified date/time to that of the server's.
CkFileAccessW_SetLastModified(fac,CkStringBuilderW_getAsString(localPath),lastModRemote);
}
i = i + 1;
}
wprintf(L"All finished.\n");
CkHttpW_Dispose(http);
CkStringBuilderW_Dispose(sbJson);
CkFileAccessW_Dispose(fac);
CkJsonObjectW_Dispose(json);
CkDateTimeW_Dispose(lastModRemote);
CkDateTimeW_Dispose(lastModLocal);
CkStringBuilderW_Dispose(localPath);
CkStringBuilderW_Dispose(fileUrl);
}