Rust

Download Google Contact Photo

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Demonstrates how to download Google Contact's photo. Rust

// 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 json_token = chilkat::JsonObject::new();
if json_token.load_file("qa_data/tokens/googleContacts.json").is_err() {
    println!("Failed to load googleContacts.json");
    return;
}

let g_auth = chilkat::AuthGoogle::new();
g_auth.set_access_token(&json_token.string_of("access_token").unwrap_or_default());

let rest = chilkat::Rest::new();

// Connect using TLS.
let b_auto_reconnect = true;
let _ = rest.connect("www.google.com", 443, true, b_auto_reconnect).is_ok();

// Provide the authentication credentials (i.e. the access token)
let _ = rest.set_auth_google(&g_auth);

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

// To get the photo, send the following:

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

let _ = rest.add_header("GData-Version", "3.0");

let sb_path = chilkat::StringBuilder::new();
// Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
let contact_id = "1ea2e4fe0ef24e09".to_string();
let _ = sb_path.set_string("/m8/feeds/photos/media/default/{contactId}");
let num_replacements = sb_path.replace("{contactId}", &contact_id);

let image_data = chilkat::BinData::new();
if rest.full_request_no_body_bd("GET", &sb_path.get_as_string().unwrap_or_default(), &image_data).is_err() {
    println!("{}", rest.last_error_text());
    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.response_status_code() == 404 {
    println!("This contact has no photo.");
    return;
}

// A successful response will have a status code equal to 200.
if rest.response_status_code() != 200 {
    // If the response was not successful, then the response body
    // does not contain image data.  Instead it contains XML.
    let sb_response_body = chilkat::StringBuilder::new();
    let _ = sb_response_body.append_bd(&image_data, "utf-8", 0, 0);

    println!("response status code = {}", rest.response_status_code());
    println!("response status text = {}", rest.response_status_text());
    println!("response header: {}", rest.response_header());
    println!("response body: {}", sb_response_body.get_as_string().unwrap_or_default());
    println!("request startline: {}", rest.last_request_start_line());
    println!("request header: {}", rest.last_request_header());
    return;
}

// Examine the content-type in the response header so we know what file
// extension to use (.jpg, .png, etc.)
let sb_content_type = chilkat::StringBuilder::new();
let _ = sb_content_type.append(&rest.response_hdr_by_name("Content-Type").unwrap_or_default());

if sb_content_type.contents_equal("image/jpeg", false) {
    let _ = image_data.write_file("qa_output/contact_photo.jpg");
}

if sb_content_type.contents_equal("image/png", false) {
    let _ = image_data.write_file("qa_output/contact_photo.png");
}

println!("Content-Type: {}", sb_content_type.get_as_string().unwrap_or_default());
println!("Success.");