(Swift 3,4,5...) Upload Media to Twitter

Demonstrates uploading image or video files to Twitter. After uploading, the media_id can be used to attach the uploaded media to a tweet.

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

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

    // Assume we've previously obtained an access token and saved it to a JSON file..
    let jsonToken = CkoJsonObject()!
    var success: Bool = jsonToken.loadFile("qa_data/tokens/twitter.json")

    let http = CkoHttp()!

    // Provide the OAuth 1.0a credentials:
    http.oAuth1 = true
    http.oAuthConsumerKey = "TWITTER_CONSUMER_KEY"
    http.oAuthConsumerSecret = "TWITTER_CONSUMER_SECRET"
    http.oAuthToken = jsonToken.string(of: "oauth_token")
    http.oAuthTokenSecret = jsonToken.string(of: "oauth_token_secret")

    let req = CkoHttpRequest()!
    req.httpVerb = "POST"
    req.contentType = "multipart/form-data"
    req.path = "/1.1/media/upload.json"

    req.addHeader("Expect", value: "100-continue")

    // Add a JPEG image file to the upload.
    let fac = CkoFileAccess()!
    var jpgBytes: NSData
    jpgBytes = fac.readEntireFile("qa_data/jpg/starfish.jpg")
    req.addBytes(forUpload: "media", filename: "starfish.jpg", byteData: jpgBytes)

    var resp: CkoHttpResponse? = http.synchronousRequest("upload.twitter.com", port: 443, ssl: true, req: req)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    let jsonResponse = CkoJsonObject()!
    jsonResponse.emitCompact = false
    jsonResponse.load(resp!.bodyStr)

    if resp!.statusCode.intValue != 200 {
        print("\(jsonResponse.emit()!)")
        return
    }

    resp = nil

    // Show the successful response:
    print("\(jsonResponse.emit()!)")
    print("Success.")

    // A successful JSON response looks like this:

    // 	{
    // 	  "media_id": 793137045996646400,
    // 	  "media_id_string": "793137045996646400",
    // 	  "size": 6229,
    // 	  "expires_after_secs": 86400,
    // 	  "image": {
    // 	    "image_type": "image\/jpeg",
    // 	    "w": 120,
    // 	    "h": 120
    // 	  }
    // 	}
    // 

    // Get the information from the JSON:
    print("media_id_string = \(jsonResponse.string(of: "media_id_string")!)")
    print("size = \(jsonResponse.int(of: "size").intValue)")
    print("image_type = \(jsonResponse.string(of: "image.image_type")!)")
    print("height/width = \(jsonResponse.int(of: "image.w").intValue),\(jsonResponse.int(of: "image.h").intValue)")

}