Unicode C++ GMail: Search for Messages with Subject Containing a Word

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Return messages matching the specified query. See https://support.google.com/mail/answer/7190?hl=en for additional information about search operators. This example searches for all emails having the whole word "ADVChina" in the subject.

Documentation: https://support.google.com/mail/answer/7190?hl=en

CURL Command

curl -X GET https://www.googleapis.com/gmail/v1/users/me/messages?q=subject:ADVChina \
    --header "Authorization: Bearer GMAIL_TOKEN"

Unicode C++ Example

#include <CkRestW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    CkRestW rest;
    bool success;

    //  URL: https://www.googleapis.com/gmail/v1/users/me/messages?q=subject:ADVChina
    bool bTls = true;
    int port = 443;
    bool bAutoReconnect = true;
    success = rest.Connect(L"www.googleapis.com",port,bTls,bAutoReconnect);
    if (success != true) {
        wprintf(L"ConnectFailReason: %d\n",rest.get_ConnectFailReason());
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    rest.AddHeader(L"Authorization",L"Bearer GMAIL_TOKEN");

    CkStringBuilderW sbResponseBody;
    success = rest.FullRequestNoBodySb(L"GET",L"/gmail/v1/users/me/messages?q=subject:ADVChina",sbResponseBody);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    int respStatusCode = rest.get_ResponseStatusCode();
    if (respStatusCode >= 400) {
        wprintf(L"Response Status Code = %d\n",respStatusCode);
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",rest.responseHeader());
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",sbResponseBody.getAsString());
        return;
    }

    CkJsonObjectW jsonResponse;
    jsonResponse.LoadSb(sbResponseBody);

    //  See the Online Tool for Generating JSON Parse Code
    int i;
    int count_i;

    int resultSizeEstimate = jsonResponse.IntOf(L"resultSizeEstimate");
    i = 0;
    count_i = jsonResponse.SizeOfArray(L"messages");
    while (i < count_i) {
        jsonResponse.put_I(i);
        const wchar_t *id = jsonResponse.stringOf(L"messages[i].id");
        const wchar_t *threadId = jsonResponse.stringOf(L"messages[i].threadId");
        i = i + 1;
    }
    }

Sample JSON Response Body

{
  "messages": [
    {
      "id": "166e50fed0b9b0cb",
      "threadId": "166e50fed0b9b0cb"
    },
    {
      "id": "166c12e5fee013fe",
      "threadId": "166c12e5fee013fe"
    },
    {
      "id": "1669cc9a926bb8c1",
      "threadId": "1669cc9a926bb8c1"
    },
    {
      "id": "16678c485e7f0a0c",
      "threadId": "16678c485e7f0a0c"
    }
  ],
  "resultSizeEstimate": 4
}