Lua

Amazon Glacier Get Vault Access Policy

See more Amazon Glacier Examples

Demonstrates how to retrieve the access-policy subresource set on the vault Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local rest = chilkat.Rest.new()

-- Connect to the Amazon AWS REST server in the desired region.
local bTls = true
local port = 443
local bAutoReconnect = true
local success = rest:connect("glacier.us-west-2.amazonaws.com", port, bTls, bAutoReconnect)

-- Provide AWS credentials.
local authAws = chilkat.AuthAws.new()
authAws.access_key = "AWS_ACCESS_KEY"
authAws.secret_key = "AWS_SECRET_KEY"
authAws.service_name = "glacier"
authAws.region = "us-west-2"

success = rest:set_auth_aws(authAws)

-- --------------------------------------------------------------------------
-- Note: The above REST connection and setup of the AWS credentials
-- can be done once.  After connecting, any number of REST calls can be made.
-- The "auto reconnect" property passed to rest.Connect indicates that if
-- the connection is lost, a REST method call will automatically reconnect
-- if needed.
-- --------------------------------------------------------------------------

-- For more information, see Glacier Get Vault Access Policy Reference Documentation
--
rest:add_header("x-amz-glacier-version", "2012-06-01")

-- Get the access policy for the "chilkat" vault.
local sbResponseBody = chilkat.StringBuilder.new()
success = rest:full_request_no_body_sb("GET", "/AWS_ACCOUNT_ID/vaults/chilkat/access-policy", sbResponseBody)
if not success then
    print(rest.last_error_text)
    return
end

local respStatusCode = rest.response_status_code
if respStatusCode >= 400 then
    print("Response Status Code = " .. respStatusCode)
    print("Response Header:")
    print(rest.response_header)
    print("Response Body:")
    print(sbResponseBody:get_as_string())
    return
end

-- Success is indicated by a 200 response status.
print("response status code = " .. respStatusCode)

local json = chilkat.JsonObject.new()
json:load_sb(sbResponseBody)
json.emit_compact = false

-- Returns JSON such as this:
-- {
--   "Policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Sid\":\"Define-owner-access-rights\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::9999999999999:root\"},\"Action\":\"glacier:DeleteArchive\",\"Resource\":\"arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat\"}]}"
-- }

-- Unwrap...
local jsonPolicy = chilkat.JsonObject.new()
jsonPolicy:load(json:string_of("Policy"))
jsonPolicy.emit_compact = false

print(jsonPolicy:emit())
print("----")

-- The jsonPolicy contains:

-- {
--   "Version": "2012-10-17",
--   "Statement": [
--     {
--       "Sid": "Define-owner-access-rights",
--       "Effect": "Allow",
--       "Principal": {
--         "AWS": "arn:aws:iam::9999999999999:root"
--       },
--       "Action": "glacier:DeleteArchive",
--       "Resource": "arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat"
--     }
--   ]
-- }
--

-- Use this online tool to generate parsing code from sample JSON:
-- Generate Parsing Code from JSON

-- To parse the above contents of jsonPolicy...
local Sid = ""
local Effect = ""
local PrincipalAWS = ""
local Action = ""
local Resource = ""

local Version = jsonPolicy:string_of("Version")
local i = 0
local count_i = jsonPolicy:size_of_array("Statement")
while i < count_i do
    jsonPolicy.i = i
    Sid = jsonPolicy:string_of("Statement[i].Sid")
    Effect = jsonPolicy:string_of("Statement[i].Effect")
    PrincipalAWS = jsonPolicy:string_of("Statement[i].Principal.AWS")
    Action = jsonPolicy:string_of("Statement[i].Action")
    Resource = jsonPolicy:string_of("Statement[i].Resource")
    i = i + 1
end