Zig

DynamoDB - ListTables

See more Amazon DynamoDB Examples

Returns an array of table names associated with the current account and endpoint. The output from ListTables is paginated, with each page returning a maximum of 100 table names. Zig

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

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

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

    // Implements the following CURL command:

    // curl -X POST https://dynamodb.us-west-2.amazonaws.com/ \
    //   -H "Accept-Encoding: identity" \
    //   -H "Content-Type: application/x-amz-json-1.0" \
    //   -H "Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>" \
    //   -H "X-Amz-Date: <Date>" \
    //   -H "X-Amz-Target: DynamoDB_20120810.ListTables" \
    //   -d '{
    //     "Limit": 100
    // }'

    // Use the following online tool to generate REST code from a CURL command
    // Convert a cURL Command to REST Source Code

    const auth_aws = try chilkat.AuthAws.init();
    defer auth_aws.deinit();
    auth_aws.setAccessKey("AWS_ACCESS_KEY");
    auth_aws.setSecretKey("AWS_SECRET_KEY");
    // Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
    auth_aws.setRegion("us-west-2");
    auth_aws.setServiceName("dynamodb");

    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    rest.setAuthAws(auth_aws) catch {};

    // URL: https://dynamodb.us-west-2.amazonaws.com/
    const b_tls = true;
    const port = 443;
    const b_auto_reconnect = true;
    // Don't forget to change the region domain (us-west-2.amazonaws.com) to your particular region.
    rest.connect("dynamodb.us-west-2.amazonaws.com", port, b_tls, b_auto_reconnect) catch {
        std.debug.print("ConnectFailReason: {d}\n", .{rest.getConnectFailReason()});
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // Note: The above code does not need to be repeatedly called for each REST request.
    // The rest object can be setup once, and then many requests can be sent.  Chilkat will automatically
    // reconnect within a FullRequest* method as needed.  It is only the very first connection that is explicitly
    // made via the Connect method.

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "Limit": 100
    // }

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.updateInt("Limit", 100) catch {};

    rest.addHeader("Content-Type", "application/x-amz-json-1.0") catch {};
    rest.addHeader("X-Amz-Target", "DynamoDB_20120810.ListTables") catch {};
    rest.addHeader("Accept-Encoding", "identity") catch {};

    const sb_request_body = try chilkat.StringBuilder.init();
    defer sb_request_body.deinit();
    json.emitSb(sb_request_body) catch {};
    const sb_response_body = try chilkat.StringBuilder.init();
    defer sb_response_body.deinit();
    rest.fullRequestSb("POST", "/", sb_request_body, sb_response_body) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    const resp_status_code = rest.getResponseStatusCode();
    std.debug.print("response status code = {d}\n", .{resp_status_code});

    if (resp_status_code >= 400) {
        std.debug.print("Response Status Code = {d}\n", .{resp_status_code});
        std.debug.print("Response Header:\n", .{});
        std.debug.print("{s}\n", .{try rest.getResponseHeader(alloc)});
        std.debug.print("Response Body:\n", .{});
        std.debug.print("{s}\n", .{try sb_response_body.getAsString(alloc)});
        return;
    }

    const json_response = try chilkat.JsonObject.init();
    defer json_response.deinit();
    json_response.loadSb(sb_response_body) catch {};

    json_response.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json_response.emit(alloc)});

    // Sample JSON response:

    // {
    //     "LastEvaluatedTableName": "Thread",
    //     "TableNames": ["Forum","Reply","Thread"]
    // }

    var str_val: [:0]const u8 = "";

    _ = try json_response.stringOf(alloc, "LastEvaluatedTableName");
    var i: i32 = 0;
    const count_i = json_response.sizeOfArray("TableNames");
    while (i < count_i) {
        json_response.setI(i);
        str_val = try json_response.stringOf(alloc, "TableNames[i]");
        i = i + 1;
    }
}