Zig

Google Contacts - Delete a Contact

See more Google APIs Examples

Demonstrates how to delete a Google Contact. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // 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

    const json_token = try chilkat.JsonObject.init();
    defer json_token.deinit();
    json_token.loadFile("qa_data/tokens/googleContacts.json") catch {
        std.debug.print("Failed to load googleContacts.json\n", .{});
        return;
    };

    const g_auth = try chilkat.AuthGoogle.init();
    defer g_auth.deinit();
    g_auth.setAccessToken(try json_token.stringOf(alloc, "access_token"));

    const rest = try chilkat.Rest.init();
    defer rest.deinit();

    // Connect using TLS.
    const b_auto_reconnect = true;
    try rest.connect("www.google.com", 443, true, b_auto_reconnect);

    // Provide the authentication credentials (i.e. the access token)
    rest.setAuthGoogle(g_auth) catch {};

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

    // To update a contact, we'll first get the contact information
    // to get the etag.

    // To retrieve the contact, send the following:
    //     GET /m8/feeds/contacts/default/full/{contactId}
    //     GData-Version: 3.0

    rest.addHeader("GData-Version", "3.0") catch {};

    const sb_path = try chilkat.StringBuilder.init();
    defer sb_path.deinit();
    sb_path.append("/m8/feeds/contacts/default/full/{contactId}") catch {};
    // Get the contact having contactId = "5b6d64980b1ed462"
    _ = sb_path.replace("{contactId}", "5b6d64980b1ed462");

    const sb_response_body = try chilkat.StringBuilder.init();
    defer sb_response_body.deinit();
    rest.fullRequestNoBodySb("GET", try sb_path.getAsString(alloc), sb_response_body) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // A successful response will have a status code equal to 200.
    if (rest.getResponseStatusCode() != 200) {
        std.debug.print("response status code = {d}\n", .{rest.getResponseStatusCode()});
        std.debug.print("response status text = {s}\n", .{try rest.getResponseStatusText(alloc)});
        std.debug.print("response header: {s}\n", .{try rest.getResponseHeader(alloc)});
        std.debug.print("response body: {s}\n", .{try sb_response_body.getAsString(alloc)});
        return;
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    const xml = try chilkat.Xml.init();
    defer xml.deinit();
    xml.loadSb(sb_response_body, false) catch {};

    std.debug.print("{s}\n", .{try xml.getXml(alloc)});
    std.debug.print("-------------------\n", .{});

    // Get the etag:
    const last_known_etag = try xml.getAttrValue(alloc, "gd:etag");
    std.debug.print("lastKnownEtag = {s}\n", .{last_known_etag});
    std.debug.print("-------------------\n", .{});

    // To delete, send the following:

    //     DELETE /m8/feeds/contacts/default/full/{contactId}
    //     If-Match: {lastKnownEtag}
    //     GData-Version: 3.0

    rest.clearAllHeaders() catch {};
    rest.addHeader("If-Match", last_known_etag) catch {};
    rest.addHeader("GData-Version", "3.0") catch {};

    // The sbPath already contains the correct path..
    rest.fullRequestNoBodySb("DELETE", try sb_path.getAsString(alloc), sb_response_body) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // A successful response will have a status code equal to 200.
    if (rest.getResponseStatusCode() != 200) {
        std.debug.print("response status code = {d}\n", .{rest.getResponseStatusCode()});
        std.debug.print("response status text = {s}\n", .{try rest.getResponseStatusText(alloc)});
        std.debug.print("response header: {s}\n", .{try rest.getResponseHeader(alloc)});
        std.debug.print("response body: {s}\n", .{try sb_response_body.getAsString(alloc)});
        std.debug.print("request header: {s}\n", .{try rest.getLastRequestHeader(alloc)});
        return;
    }

    // The response body for a successful DELETE is empty.
    std.debug.print("Response Body: (should be empty)\n", .{});
    std.debug.print("{s}\n", .{try sb_response_body.getAsString(alloc)});
    std.debug.print("Success.\n", .{});
}