Rust

Find Contact Having Email Address

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Demonstrates how to fetch the Google Contact for a given email address. 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 retrieve the contacts, we need to send the following:

// 	GET /m8/feeds/contacts/default/full?q=<emailAddress>
// 	GData-Version: 3.0

// Get the contact (or contacts) with this email address:
let email_address_to_find = "admin@chilkatsoft.com".to_string();

let _ = rest.add_header("GData-Version", "3.0");
let _ = rest.add_query_param("q", &email_address_to_find);

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);

// See below for a sample response body.
let _ = xml.save_xml("qa_output/google_contacts.xml");

// 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.
let total_results = xml.get_child_int_value("openSearch:totalResults");
let start_index = 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_index);
println!("itemsPerPage = {}", items_per_page);

// We'll borrow a method from FileAccess to get the contactId from the URL string (see the code in the while loop)
let fac = chilkat::FileAccess::new();

// 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!("{} ----", i + 1);
    println!("title: {}", xml.get_child_content("entry[i]|title").unwrap_or_default());

    // The entry "id" child contains a URL having this format:
    // <id>http://www.google.com/m8/feeds/contacts/{userEmail}/base/{contactId}</id>
    // Let's get the URL and parse the contactId from it..
    let id_url = xml.get_child_content("entry[i]|id").unwrap_or_default();
    println!("id: {}", id_url);

    // Use the parsing ability of GetFileName to get the contactId
    let contact_id = fac.get_file_name(&id_url).unwrap_or_default();
    println!("contactId: {}", contact_id);

    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);
    }

    i = i + 1;
}