(Swift 2) 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

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let http = CkoHttp()

    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.
    let jsonMsgIds = CkoJsonObject()
    var success: Bool = jsonMsgIds.LoadFile("qa_data/json/gmail_message_ids.json")

    var id: String?
    var i: Int = 0
    var count_i: Int = jsonMsgIds.SizeOfArray("messages").intValue
    while i < count_i {
        jsonMsgIds.I = i
        id = jsonMsgIds.StringOf("messages[i].id")

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

        var resp: CkoHttpResponse? = http.QuickRequest("GET", url: "https://www.googleapis.com/gmail/v1/users/userId/messages/{$id}?format=metadata")
        if http.LastMethodSuccess != true {
            print("\(http.LastErrorText)")
            return
        }

        print("Response Status Code: \(resp!.StatusCode.intValue)")

        let jsonResponse = CkoJsonObject()
        jsonResponse.Load(resp!.BodyStr)
        jsonResponse.EmitCompact = false
        print("\(jsonResponse.Emit())")

        if resp!.StatusCode.intValue != 200 {
            print("Failed.")
            resp = nil
            return
        }

        resp = nil

        i = i + 1
    }

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

}