AWS SDK for Ruby
Developer Guide

Debugging Tip: Getting Wire Trace Information from a Client

You can get wire trace information from an AWS client when you create it by setting the http_wire_trace option. This information helps differentiate client changes, service issues, and user errors. The following example creates an Amazon S3 client with wire tracing enabled.

s3 = Aws::S3::Client.new(http_wire_trace: true)

Given the following code and the argument bucket_name, the output displays a message that says whether a bucket with that name exists.

require 'aws-sdk' s3 = Aws::S3::Resource.new(client: Aws::S3::Client.new(http_wire_trace: true)) if s3.bucket(ARGV[0]).exists? puts "Bucket #{ARGV[0]} exists" else puts "Bucket #{ARGV[0]} does not exist" end

If the bucket exists, the output looks something like the following, where ACCESS_KEY is the value of your access key. (Returns were added to the HEAD line for readability.)

opening connection to bucket_name.s3-us-west-1.amazonaws.com:443... opened starting SSL for bucket_name.s3-us-west-1.amazonaws.com:443... SSL established <- "HEAD / HTTP/1.1\r\n Content-Type: \r\n Accept-Encoding: \r\n User-Agent: aws-sdk-ruby2/2.2.7 ruby/2.1.7 x64-mingw32\r\n X-Amz-Date: 20160121T191751Z\r\n Host: bucket_name.s3-us-west-1.amazonaws.com\r\n X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\r\n Authorization: AWS4-HMAC-SHA256 Credential=ACCESS_KEY/20160121/us-west-1/s3/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=2ca8301c5e829700940d3cc3bca2a3e8d79d177f2c046c34a1a285770db63820\r\n Content-Length: 0\r\n Accept: */*\r\n \r\n" -> "HTTP/1.1 301 Moved Permanently\r\n" -> "x-amz-bucket-region: us-west-2\r\n" -> "x-amz-request-id: F3C75F33EF0792C4\r\n" -> "x-amz-id-2: N6BzRLx8b68NmF50g1IxLzT+E4uWPuAIRe7Pl4XKl5STT4tfNO7gBsO8qrrAnG4CbVpU0iIRXmk=\r\n" -> "Content-Type: application/xml\r\n" -> "Transfer-Encoding: chunked\r\n" -> "Date: Thu, 21 Jan 2016 19:17:54 GMT\r\n" -> "Server: AmazonS3\r\n" -> "\r\n" Conn keep-alive Bucket bucket_name exists