Rust

Page Through All Contacts

See more Google APIs Examples

Demonstrates how to page through the entire list of Google Contacts. 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..
// ----------------------------------------------

let mut start_index = 1;
let max_results = 25;
// The totalResults will get updated with the correct value in the 1st loop iteration..
let mut total_results = 100;
// To retrieve the contacts in pages of 25 each, we need to send the following for each page.

// 	GET /m8/feeds/contacts/default/full?max-results=25&start-index=<startIndex>
// 	GData-Version: 3.0

let sb_max_results = chilkat::StringBuilder::new();
let _ = sb_max_results.append_int(max_results);
let sb_start_index = chilkat::StringBuilder::new();

let mut loop_iteration = 0;
while start_index <= total_results {

    sb_start_index.clear();
    let _ = sb_start_index.append_int(start_index);

    let _ = rest.clear_all_headers();
    let _ = rest.clear_all_query_params();
    let _ = rest.add_header("GData-Version", "3.0");
    let _ = rest.add_query_param("start-index", &sb_start_index.get_as_string().unwrap_or_default());
    let _ = rest.add_query_param("max-results", &sb_max_results.get_as_string().unwrap_or_default());

    let sb_response_body = chilkat::StringBuilder::new();
    if rest.full_request_no_body_sb("GET", "/m8/feeds/contacts/default/full", &sb_response_body).is_err() {
        println!("{}", rest.last_error_text());
        return;
    }

    // A successful response will have a status code equal to 200.
    if rest.response_status_code() != 200 {
        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());
        return;
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    let xml = chilkat::Xml::new();
    let _ = xml.load_sb(&sb_response_body, false);

    // Now let's parse the XML...

    // Get the the total number of results, the start index, and the items per page.
    // We'll likely NOT get the full list, but will instead get the 1st page.
    total_results = xml.get_child_int_value("openSearch:totalResults");
    let start_index2 = xml.get_child_int_value("openSearch:startIndex");
    let items_per_page = xml.get_child_int_value("openSearch:itemsPerPage");
    println!("totalResults = {}", total_results);
    println!("startIndex = {}", start_index2);
    println!("itemsPerPage = {}", items_per_page);

    // Iterate over each contact.
    let num_entries = xml.num_children_having_tag("entry");
    let mut i = 0;
    while i < num_entries {
        xml.set_i(i);
        println!("{} ----", loop_iteration * max_results + i + 1);
        println!("title: {}", xml.get_child_content("entry[i]|title").unwrap_or_default());

        let id_url = xml.get_child_content("entry[i]|id").unwrap_or_default();
        println!("id: {}", id_url);

        if let Ok(full_name) = xml.chilkat_path("entry[i]|gd:name|gd:fullName|*") {
            println!("fullName: {}", full_name);
        }

        if let Ok(email_address) = xml.chilkat_path("entry[i]|gd:email|(address)") {
            println!("email address: {}", email_address);
        }

        // Find the photo link and check to see if this contact has a photo.
        if let Ok(x_link) = xml.get_child_with_attr("link", "rel", "http://schemas.google.com/contacts/2008/rel#photo") {
            // Get the photo etag.
            let b_has_photo = x_link.has_attribute("gd:etag");
            if b_has_photo {
                println!("This contact has a photo.");
            }

        }

        i = i + 1;
    }

    start_index = start_index + max_results;
    loop_iteration = loop_iteration + 1;
}