Unicode C

Get a List of Message IDs in GMail User's Mailbox

See more GMail REST API Examples

Demonstrates how to get a list of message IDs in a GMail mailbox. The "userId" can be either the user's email address or the special value "me" to indicate the authenticated user. Unicode C

#include <C_CkHttpW.h>
#include <C_CkHttpResponseW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttpW http;
    HCkHttpResponseW resp;
    HCkJsonObjectW jsonResponse;
    const wchar_t *id;
    const wchar_t *threadId;
    int resultSizeEstimate;
    int i;
    int count_i;

    success = FALSE;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttpW_Create();

    CkHttpW_putAuthToken(http,L"ACCESS_TOKEN");

    CkHttpW_putAccept(http,L"application/json");

    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpNoBody(http,L"GET",L"https://www.googleapis.com/gmail/v1/users/userId/messages",resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    wprintf(L"Response Status Code: %d\n",CkHttpResponseW_getStatusCode(resp));

    jsonResponse = CkJsonObjectW_Create();
    CkJsonObjectW_Load(jsonResponse,CkHttpResponseW_bodyStr(resp));
    CkJsonObjectW_putEmitCompact(jsonResponse,FALSE);
    wprintf(L"%s\n",CkJsonObjectW_emit(jsonResponse));

    if (CkHttpResponseW_getStatusCode(resp) != 200) {
        wprintf(L"Failed.\n");
        CkHttpW_Dispose(http);
        CkHttpResponseW_Dispose(resp);
        CkJsonObjectW_Dispose(jsonResponse);
        return;
    }

    // {
    //   "messages": [
    //     users.messages Resource
    //   ],
    //   "nextPageToken": string,
    //   "resultSizeEstimate": unsigned integer
    // }

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    resultSizeEstimate = CkJsonObjectW_IntOf(jsonResponse,L"resultSizeEstimate");
    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(jsonResponse,L"messages");
    while (i < count_i) {
        CkJsonObjectW_putI(jsonResponse,i);
        id = CkJsonObjectW_stringOf(jsonResponse,L"messages[i].id");
        threadId = CkJsonObjectW_stringOf(jsonResponse,L"messages[i].threadId");
        i = i + 1;
    }



    CkHttpW_Dispose(http);
    CkHttpResponseW_Dispose(resp);
    CkJsonObjectW_Dispose(jsonResponse);

    }