(JavaScript) Get GMail Message Metadata

Demonstrates how to get the metadata for each message in a list of message IDs.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/get

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var http = new CkHttp();

http.AuthToken = "ACCESS_TOKEN";

http.Accept = "application/json";

// Let's say we have the following JSON containing a list of message ID's

// {
//   "messages": [
//     {
//       "id": "1712bc1dc22da2a2",
//       "threadId": "1712bc1dc22da2a2"
//     },
//     {
//       "id": "1712b94fa2168040",
//       "threadId": "1712b94fa2168040"
//     },
//     {
//       "id": "1711e4bd96ded05e",
//       "threadId": "1711e4bd96ded05e"
//     },
//     {
//       "id": "1711de0d119e751e",
//       "threadId": "1711de0d119e751e"
//     },
//     {
//       "id": "1711c81a43050f59",
//       "threadId": "1711c81a43050f59"
//     },
//     {
//       "id": "1711c2c1516abce5",
//       "threadId": "1711c2c1516abce5"
//     },
//     {
//       "id": "1711c161e655c915",
//       "threadId": "1711c161e655c915"
//     },
//     {
//       "id": "171199c6e454558c",
//       "threadId": "171199c6e454558c"
//     },
//     {
//       "id": "17119474c8aa248e",
//       "threadId": "17119474c8aa248e"
//     }
//   ],
//   "nextPageToken": "16710921492249671162",
//   "resultSizeEstimate": 309
// }

// Normally your program would have the above JSON in a string variable (obtained from a previous call to get
// a list of message IDs from a GMail mailbox).  In this example, we'll load the JSON from a file.
var jsonMsgIds = new CkJsonObject();
success = jsonMsgIds.LoadFile("qa_data/json/gmail_message_ids.json");

var resp = new CkHttpResponse();

var id;
var i = 0;
var count_i = jsonMsgIds.SizeOfArray("messages");
while (i < count_i) {
    jsonMsgIds.I = i;
    id = jsonMsgIds.StringOf("messages[i].id");

    // Get the metadata for this message ID.
    http.SetUrlVar("id",id);

    success = http.HttpNoBody("GET","https://www.googleapis.com/gmail/v1/users/userId/messages/{$id}?format=metadata",resp);
    if (success == false) {
        console.log(http.LastErrorText);
        return;
    }

    console.log("Response Status Code: " + resp.StatusCode);

    var jsonResponse = new CkJsonObject();
    jsonResponse.Load(resp.BodyStr);
    jsonResponse.EmitCompact = false;
    console.log(jsonResponse.Emit());

    if (resp.StatusCode !== 200) {
        console.log("Failed.");
        return;
    }

    i = i+1;
}

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON