Unicode C
Unicode C
Page Through All Contacts
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Demonstrates how to page through the entire list of Google Contacts.Chilkat Unicode C Downloads
#include <C_CkJsonObjectW.h>
#include <C_CkAuthGoogleW.h>
#include <C_CkRestW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkXmlW.h>
void ChilkatSample(void)
{
BOOL success;
HCkJsonObjectW jsonToken;
HCkAuthGoogleW gAuth;
HCkRestW rest;
BOOL bAutoReconnect;
int startIndex;
int maxResults;
int totalResults;
HCkStringBuilderW sbMaxResults;
HCkStringBuilderW sbStartIndex;
int loopIteration;
HCkStringBuilderW sbResponseBody;
HCkXmlW xml;
int startIndex2;
int itemsPerPage;
int numEntries;
int i;
const wchar_t *idUrl;
const wchar_t *fullName;
const wchar_t *emailAddress;
HCkXmlW xLink;
BOOL bHasPhoto;
success = FALSE;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// --------------------------------------------------------------------------------------------------------
// Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
// Once connected, the REST object may be re-used for many REST API calls.
// (It's a good idea to put the connection setup code in a separate function/subroutine.)
// --------------------------------------------------------------------------------------------------------
// It is assumed we previously obtained an OAuth2 access token.
// This example loads the JSON access token file
// saved by this example: Get Google Contacts OAuth2 Access Token
jsonToken = CkJsonObjectW_Create();
success = CkJsonObjectW_LoadFile(jsonToken,L"qa_data/tokens/googleContacts.json");
if (success != TRUE) {
wprintf(L"Failed to load googleContacts.json\n");
CkJsonObjectW_Dispose(jsonToken);
return;
}
gAuth = CkAuthGoogleW_Create();
CkAuthGoogleW_putAccessToken(gAuth,CkJsonObjectW_stringOf(jsonToken,L"access_token"));
rest = CkRestW_Create();
// Connect using TLS.
bAutoReconnect = TRUE;
success = CkRestW_Connect(rest,L"www.google.com",443,TRUE,bAutoReconnect);
// Provide the authentication credentials (i.e. the access token)
CkRestW_SetAuthGoogle(rest,gAuth);
// ----------------------------------------------
// OK, the REST connection setup is completed..
// ----------------------------------------------
startIndex = 1;
maxResults = 25;
// The totalResults will get updated with the correct value in the 1st loop iteration..
totalResults = 100;
// To retrieve the contacts in pages of 25 each, we need to send the following for each page.
// GET /m8/feeds/contacts/default/full?max-results=25&start-index=<startIndex>
// GData-Version: 3.0
sbMaxResults = CkStringBuilderW_Create();
CkStringBuilderW_AppendInt(sbMaxResults,maxResults);
sbStartIndex = CkStringBuilderW_Create();
loopIteration = 0;
while (startIndex <= totalResults) {
CkStringBuilderW_Clear(sbStartIndex);
CkStringBuilderW_AppendInt(sbStartIndex,startIndex);
CkRestW_ClearAllHeaders(rest);
CkRestW_ClearAllQueryParams(rest);
CkRestW_AddHeader(rest,L"GData-Version",L"3.0");
CkRestW_AddQueryParam(rest,L"start-index",CkStringBuilderW_getAsString(sbStartIndex));
CkRestW_AddQueryParam(rest,L"max-results",CkStringBuilderW_getAsString(sbMaxResults));
sbResponseBody = CkStringBuilderW_Create();
success = CkRestW_FullRequestNoBodySb(rest,L"GET",L"/m8/feeds/contacts/default/full",sbResponseBody);
if (success != TRUE) {
wprintf(L"%s\n",CkRestW_lastErrorText(rest));
CkJsonObjectW_Dispose(jsonToken);
CkAuthGoogleW_Dispose(gAuth);
CkRestW_Dispose(rest);
CkStringBuilderW_Dispose(sbMaxResults);
CkStringBuilderW_Dispose(sbStartIndex);
CkStringBuilderW_Dispose(sbResponseBody);
return;
}
// A successful response will have a status code equal to 200.
if (CkRestW_getResponseStatusCode(rest) != 200) {
wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest));
wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest));
wprintf(L"response header: %s\n",CkRestW_responseHeader(rest));
wprintf(L"response body: %s\n",CkStringBuilderW_getAsString(sbResponseBody));
CkJsonObjectW_Dispose(jsonToken);
CkAuthGoogleW_Dispose(gAuth);
CkRestW_Dispose(rest);
CkStringBuilderW_Dispose(sbMaxResults);
CkStringBuilderW_Dispose(sbStartIndex);
CkStringBuilderW_Dispose(sbResponseBody);
return;
}
// If the 200 response was received, then the contacts XML is contained
// in the response body.
xml = CkXmlW_Create();
CkXmlW_LoadSb(xml,sbResponseBody,FALSE);
// Now let's parse the XML...
// Get the the total number of results, the start index, and the items per page.
// We'll likely NOT get the full list, but will instead get the 1st page.
totalResults = CkXmlW_GetChildIntValue(xml,L"openSearch:totalResults");
startIndex2 = CkXmlW_GetChildIntValue(xml,L"openSearch:startIndex");
itemsPerPage = CkXmlW_GetChildIntValue(xml,L"openSearch:itemsPerPage");
wprintf(L"totalResults = %d\n",totalResults);
wprintf(L"startIndex = %d\n",startIndex2);
wprintf(L"itemsPerPage = %d\n",itemsPerPage);
// Iterate over each contact.
numEntries = CkXmlW_NumChildrenHavingTag(xml,L"entry");
i = 0;
while (i < numEntries) {
CkXmlW_putI(xml,i);
wprintf(L"%d ----\n",loopIteration * maxResults + i + 1);
wprintf(L"title: %s\n",CkXmlW_getChildContent(xml,L"entry[i]|title"));
idUrl = CkXmlW_getChildContent(xml,L"entry[i]|id");
wprintf(L"id: %s\n",idUrl);
fullName = CkXmlW_chilkatPath(xml,L"entry[i]|gd:name|gd:fullName|*");
if (CkXmlW_getLastMethodSuccess(xml) == TRUE) {
wprintf(L"fullName: %s\n",fullName);
}
emailAddress = CkXmlW_chilkatPath(xml,L"entry[i]|gd:email|(address)");
if (CkXmlW_getLastMethodSuccess(xml) == TRUE) {
wprintf(L"email address: %s\n",emailAddress);
}
// Find the photo link and check to see if this contact has a photo.
xLink = CkXmlW_GetChildWithAttr(xml,L"link",L"rel",L"http://schemas.google.com/contacts/2008/rel#photo");
if (CkXmlW_getLastMethodSuccess(xml) == TRUE) {
// Get the photo etag.
bHasPhoto = CkXmlW_HasAttribute(xLink,L"gd:etag");
if (bHasPhoto == TRUE) {
wprintf(L"This contact has a photo.\n");
}
CkXmlW_Dispose(xLink);
}
i = i + 1;
}
startIndex = startIndex + maxResults;
loopIteration = loopIteration + 1;
}
CkJsonObjectW_Dispose(jsonToken);
CkAuthGoogleW_Dispose(gAuth);
CkRestW_Dispose(rest);
CkStringBuilderW_Dispose(sbMaxResults);
CkStringBuilderW_Dispose(sbStartIndex);
CkStringBuilderW_Dispose(sbResponseBody);
CkXmlW_Dispose(xml);
}