C++ GMail: Lists the messages in the user's mailbox.

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Lists the messages in the user's mailbox.

Documentation: https://developers.google.com/gmail/api/v1/reference/users/messages/list

#include <CkRest.h>
#include <CkOAuth2.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>

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

    //   Provide a previously obtained OAuth2 access token.
    CkOAuth2 oauth2;
    oauth2.put_AccessToken("OAUTH2_ACCESS_TOKEN");
    rest.SetAuthOAuth2(oauth2);

    success = rest.Connect("www.googleapis.com",443,true,true);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    CkStringBuilder sbJson;
    success = rest.FullRequestNoBodySb("GET","/gmail/v1/users/me/messages",sbJson);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << "Received error response code: " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "Response body:" << "\r\n";
        std::cout << sbJson.getAsString() << "\r\n";
        return;
    }

    CkJsonObject json;
    json.LoadSb(sbJson);

    //  The following code parses the JSON response.
    //  A sample JSON response is shown below the sample code.
    int resultSizeEstimate;
    int i;
    int count_i;
    const char *id = 0;
    const char *threadId = 0;

    resultSizeEstimate = json.IntOf("resultSizeEstimate");
    i = 0;
    count_i = json.SizeOfArray("messages");
    while (i < count_i) {
        json.put_I(i);
        id = json.stringOf("messages[i].id");
        threadId = json.stringOf("messages[i].threadId");
        i = i + 1;
    }

    std::cout << "Example Completed." << "\r\n";
    }

Sample JSON Response Body

{
  "messages": [
    {
      "id": "15fc237e79da4174",
      "threadId": "15fc237e79da4174"
    },
    {
      "id": "15fc23688c553739",
      "threadId": "15fc23688c553739"
    },
    {
      "id": "15fbd37d3a8f9950",
      "threadId": "15fbd37d3a8f9950"
    },
    {
      "id": "15fb5e49b822ac1d",
      "threadId": "15fb5e49b822ac1d"
    },
    {
      "id": "15fb5e49b7a0739b",
      "threadId": "15fb5e49b7a0739b"
    }
  ],
  "resultSizeEstimate": 5
}