(Swift 3,4,5...) Download Google Contact Photo

Demonstrates how to download Google Contact's photo.

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.

    // --------------------------------------------------------------------------------------------------------
    // Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
    // Once connected, the REST object may be re-used for many REST API calls.
    // (It's a good idea to put the connection setup code in a separate function/subroutine.)
    // --------------------------------------------------------------------------------------------------------

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // saved by this example: Get Google Contacts OAuth2 Access Token

    let jsonToken = CkoJsonObject()!
    var success: Bool = jsonToken.loadFile("qa_data/tokens/googleContacts.json")
    if success != true {
        print("Failed to load googleContacts.json")
        return
    }

    let gAuth = CkoAuthGoogle()!
    gAuth.accessToken = jsonToken.string(of: "access_token")

    let rest = CkoRest()!

    // Connect using TLS.
    var bAutoReconnect: Bool = true
    success = rest.connect("www.google.com", port: 443, tls: true, autoReconnect: bAutoReconnect)

    // Provide the authentication credentials (i.e. the access token)
    rest.setAuthGoogle(gAuth)

    // ----------------------------------------------
    // OK, the REST connection setup is completed..
    // ----------------------------------------------

    // To get the photo, send the following:

    // 	GET /m8/feeds/photos/media/default/contactId

    rest.addHeader("GData-Version", value: "3.0")

    let sbPath = CkoStringBuilder()!
    // Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
    var contactId: String? = "1ea2e4fe0ef24e09"
    sbPath.setString("/m8/feeds/photos/media/default/{contactId}")
    var numReplacements: Int = sbPath.replace("{contactId}", replacement: contactId).intValue

    let imageData = CkoBinData()!
    success = rest.fullRequestNoBodyBd("GET", uriPath: sbPath.getAsString(), binData: imageData)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // A 404 response indicates the contact has no photo.
    // (We could've first fetched the contact information, parsed out the 
    // photo etag, and then if no photo etag existed, we'd know the contact has no
    // photo.  Or... we can just try to download the photo and if a 404 is received,
    // we know there's no photo.  Much simpler.)
    if rest.responseStatusCode.intValue == 404 {
        print("This contact has no photo.")
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.responseStatusCode.intValue != 200 {
        // If the response was not successful, then the response body
        // does not contain image data.  Instead it contains XML.
        let sbResponseBody = CkoStringBuilder()!
        sbResponseBody.appendBd(imageData, charset: "utf-8", offset: 0, numBytes: 0)

        print("response status code = \(rest.responseStatusCode.intValue)")
        print("response status text = \(rest.responseStatusText!)")
        print("response header: \(rest.responseHeader!)")
        print("response body: \(sbResponseBody.getAsString()!)")
        print("request startline: \(rest.lastRequestStartLine!)")
        print("request header: \(rest.lastRequestHeader!)")
        return
    }

    // Examine the content-type in the response header so we know what file
    // extension to use (.jpg, .png, etc.)
    let sbContentType = CkoStringBuilder()!
    sbContentType.append(rest.responseHdr(byName: "Content-Type"))

    if sbContentType.contentsEqual("image/jpeg", caseSensitive: false) == true {
        imageData.writeFile("qa_output/contact_photo.jpg")
    }

    if sbContentType.contentsEqual("image/png", caseSensitive: false) == true {
        imageData.writeFile("qa_output/contact_photo.png")
    }

    print("Content-Type: \(sbContentType.getAsString()!)")
    print("Success.")

}