(Unicode C) Update a Google Contact

Demonstrates how to update a Google Contact.

Chilkat C/C++ Library Downloads
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#include <C_CkJsonObjectW.h>
#include <C_CkAuthGoogleW.h>
#include <C_CkRestW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkXmlW.h>

void ChilkatSample(void)
    {
    HCkJsonObjectW jsonToken;
    BOOL success;
    HCkAuthGoogleW gAuth;
    HCkRestW rest;
    BOOL bAutoReconnect;
    HCkStringBuilderW sbPath;
    int numReplacements;
    HCkStringBuilderW sbResponseBody;
    HCkXmlW xml;
    const wchar_t *lastKnownEtag;
    HCkStringBuilderW sbRequestBody;

    // 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..
    // ----------------------------------------------

    // To update a contact, we'll first get the contact information,
    // then we'll make changes to the XML and then PUT the update.

    // To retrieve the contact, send the following:
    // 	GET /m8/feeds/contacts/default/full/{contactId}
    // 	GData-Version: 3.0

    CkRestW_AddHeader(rest,L"GData-Version",L"3.0");

    sbPath = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbPath,L"/m8/feeds/contacts/default/full/{contactId}");
    // Get the contact having contactId = "5b6d64980b1ed462"
    numReplacements = CkStringBuilderW_Replace(sbPath,L"{contactId}",L"5b6d64980b1ed462");

    sbResponseBody = CkStringBuilderW_Create();
    success = CkRestW_FullRequestNoBodySb(rest,L"GET",CkStringBuilderW_getAsString(sbPath),sbResponseBody);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkJsonObjectW_Dispose(jsonToken);
        CkAuthGoogleW_Dispose(gAuth);
        CkRestW_Dispose(rest);
        CkStringBuilderW_Dispose(sbPath);
        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(sbPath);
        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);

    // Get the etag:
    lastKnownEtag = CkXmlW_getAttrValue(xml,L"gd:etag");
    wprintf(L"lastKnownEtag = %s\n",lastKnownEtag);

    // Update the XML.
    // We're going to add or update with the following information:

    // 	  <gd:name>
    // 	    <gd:givenName>Joe</gd:givenName>
    // 	    <gd:familyName>Sample</gd:familyName>
    // 	    <gd:fullName>Joe Sample</gd:fullName>
    // 	  </gd:name>
    // 	  <content type="text">RIP Joe Sample, a great musician...</content>
    // 	  <gd:extendedProperty name="pet" value="hamster"/>

    CkXmlW_UpdateChildContent(xml,L"gd:name|gd:givenName",L"Joe");
    CkXmlW_UpdateChildContent(xml,L"gd:name|gd:familyName",L"Sample");
    CkXmlW_UpdateChildContent(xml,L"gd:name|gd:fullName",L"Joe Sample");
    CkXmlW_UpdateChildContent(xml,L"content",L"RIP Joe Sample, a great musician...");
    CkXmlW_UpdateAttrAt(xml,L"content",TRUE,L"type",L"text");
    CkXmlW_UpdateAttrAt(xml,L"gd:extendedProperty",TRUE,L"name",L"pet");
    CkXmlW_UpdateAttrAt(xml,L"gd:extendedProperty",TRUE,L"value",L"hamster");

    // Send the following:

    // 	PUT /m8/feeds/contacts/default/full/{contactId}
    // 	If-Match: {lastKnownEtag}
    // 	GData-Version: 3.0
    // 	Content-Type: application/atom+xml

    CkRestW_ClearAllHeaders(rest);
    CkRestW_AddHeader(rest,L"If-Match",lastKnownEtag);
    CkRestW_AddHeader(rest,L"GData-Version",L"3.0");
    CkRestW_AddHeader(rest,L"Content-Type",L"application/atom+xml");

    sbRequestBody = CkStringBuilderW_Create();
    CkXmlW_GetXmlSb(xml,sbRequestBody);

    // The sbPath already contains the correct path..
    success = CkRestW_FullRequestSb(rest,L"PUT",CkStringBuilderW_getAsString(sbPath),sbRequestBody,sbResponseBody);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkJsonObjectW_Dispose(jsonToken);
        CkAuthGoogleW_Dispose(gAuth);
        CkRestW_Dispose(rest);
        CkStringBuilderW_Dispose(sbPath);
        CkStringBuilderW_Dispose(sbResponseBody);
        CkXmlW_Dispose(xml);
        CkStringBuilderW_Dispose(sbRequestBody);
        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(sbPath);
        CkStringBuilderW_Dispose(sbResponseBody);
        CkXmlW_Dispose(xml);
        CkStringBuilderW_Dispose(sbRequestBody);
        return;
    }

    // If the 200 response was received, then the updated contact XML is contained
    // in the response body.
    CkXmlW_LoadSb(xml,sbResponseBody,FALSE);

    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",CkXmlW_getXml(xml));
    wprintf(L"Success.\n");


    CkJsonObjectW_Dispose(jsonToken);
    CkAuthGoogleW_Dispose(gAuth);
    CkRestW_Dispose(rest);
    CkStringBuilderW_Dispose(sbPath);
    CkStringBuilderW_Dispose(sbResponseBody);
    CkXmlW_Dispose(xml);
    CkStringBuilderW_Dispose(sbRequestBody);

    }