Rust
Rust
Google Contacts - Retrieve as JSON
See more Google APIs Examples
Demonstrates how to retrieve Google Contacts as JSON.Chilkat Rust Downloads
// 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
// GData-Version: 3.0
// To get the contacts data in JSON format, set the "alt" query parameter to "json"
let _ = rest.add_query_param("alt", "json");
let _ = rest.add_header("GData-Version", "3.0");
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 JSON is contained
// in the response body.
let json = chilkat::JsonObject::new();
let _ = json.load_sb(&sb_response_body);
json.set_emit_compact(false);
// Save the pretty-printed JSON response to a file.
sb_response_body.clear();
let _ = json.emit_sb(&sb_response_body);
let _ = sb_response_body.write_file("qa_output/google_contacts.json", "utf-8", false);
// Parse the Google Contacts JSON, and iterate over the contacts..
let total_results = json.int_of("feed.openSearch$totalResults.$t");
let start_index = json.int_of("feed.openSearch$startIndex.$t");
let items_per_page = json.int_of("feed.openSearch$itemsPerPage.$t");
println!("totalResults = {}", total_results);
println!("startIndex = {}", start_index);
println!("itemsPerPage = {}", items_per_page);
let num_entries = json.size_of_array("feed.entry");
let mut i = 0;
while i < num_entries {
json.set_i(i);
println!("{} ----", i + 1);
println!("title: {}", json.string_of("feed.entry[i].title.$t").unwrap_or_default());
if let Ok(full_name) = json.string_of("feed.entry[i].gd$name.gd$fullName.$t") {
println!("fullName: {}", full_name);
}
// There can be multiple email addresses, so it's stored as a JSON array..
let num_email_addresses = json.size_of_array("feed.entry[i].gd$email");
let mut j = 0;
while j < num_email_addresses {
if let Ok(email_address) = json.string_of("feed.entry[i].gd$email[j].address") {
println!("email address: {}", email_address);
}
j = j + 1;
}
i = i + 1;
}
// A sample Google Contacts JSON response:
// {
// "version": "1.0",
// "encoding": "UTF-8",
// "feed": {
// "xmlns": "http://www.w3.org/2005/Atom",
// "xmlns$openSearch": "http://a9.com/-/spec/opensearch/1.1/",
// "xmlns$gContact": "http://schemas.google.com/contact/2008",
// "xmlns$batch": "http://schemas.google.com/gdata/batch",
// "xmlns$gd": "http://schemas.google.com/g/2005",
// "gd$etag": "\"QHw5eTVSLyt7I2A9XRFaE0kNTwI.\"",
// "id": {
// "$t": "chilkat.support@gmail.com"
// },
// "updated": {
// "$t": "2016-11-17T01:57:41.221Z"
// },
// "category": [
// {
// "scheme": "http://schemas.google.com/g/2005#kind",
// "term": "http://schemas.google.com/contact/2008#contact"
// }
// ],
// "title": {
// "$t": "Chilkat Support's Contacts"
// },
// "link": [
// {
// "rel": "alternate",
// "type": "text/html",
// "href": "https://www.googleapis.com/"
// },
// {
// "rel": "http://schemas.google.com/g/2005#feed",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full"
// },
// {
// "rel": "http://schemas.google.com/g/2005#post",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full"
// },
// {
// "rel": "http://schemas.google.com/g/2005#batch",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/batch"
// },
// {
// "rel": "self",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full?max-results=25&alt=json"
// },
// {
// "rel": "next",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full?max-results=25&alt=json&start-index=26"
// }
// ],
// "author": [
// {
// "name": {
// "$t": "Chilkat Support"
// },
// "email": {
// "$t": "chilkat.support@gmail.com"
// }
// }
// ],
// "generator": {
// "version": "1.0",
// "uri": "http://www.google.com/m8/feeds",
// "$t": "Contacts"
// },
// "openSearch$totalResults": {
// "$t": "350"
// },
// "openSearch$startIndex": {
// "$t": "1"
// },
// "openSearch$itemsPerPage": {
// "$t": "25"
// },
// "entry": [
// {
// "id": {
// "$t": "http://www.google.com/m8/feeds/contacts/chilkat.support%40gmail.com/base/0"
// },
// "gd$etag": "\"SX8zcTVSLyt7I2A9WxBXFU4MQwI.\"",
// "updated": {
// "$t": "2010-01-26T20:07:48.189Z"
// },
// "app$edited": {
// "xmlns$app": "http://www.w3.org/2007/app",
// "$t": "2010-01-26T20:07:48.189Z"
// },
// "category": [
// {
// "scheme": "http://schemas.google.com/g/2005#kind",
// "term": "http://schemas.google.com/contact/2008#contact"
// }
// ],
// "title": {
// "$t": "Joe Sample"
// },
// "link": [
// {
// "rel": "http://schemas.google.com/contacts/2008/rel#photo",
// "type": "image/*",
// "href": "https://www.googleapis.com/m8/feeds/photos/media/chilkat.support%40gmail.com/0"
// },
// {
// "rel": "self",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/0"
// },
// {
// "rel": "edit",
// "type": "application/atom+xml",
// "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/0"
// }
// ],
// "gd$name": {
// "gd$fullName": {
// "$t": "Joe Sample"
// },
// "gd$givenName": {
// "$t": "Joe"
// },
// "gd$familyName": {
// "$t": "Sample"
// }
// },
// "gd$email": [
// {
// "address": "somebody@gmail.com",
// "primary": "true",
// "rel": "http://schemas.google.com/g/2005#other"
// }
// ]
// },
// ... more entries ...
// }