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我正在尝试使用 Ivona tts 服务生成语音文件。但是，我尝试按照 T 恤的身份验证步骤进行操作，但似乎无法成功进行身份验证。这是我正在运行的脚本。

require 'uri'
require 'openssl'
require 'net/http'
require 'cgi'

method = 'POST'
service_string = 'tts'
host = 'tts.eu-west-1.ivonacloud.com'
region = 'eu-west-1'
canonical_uri = 'CreateSpeech'
endpoint = "https://tts.eu-west-1.ivonacloud.com/#{canonical_uri}"

t = Time.now.utc
amzdate = t.strftime('%Y%m%dT%H%M%SZ')
datestamp = t.strftime('%Y%m%d')
query = "'Hello_world'"

def getSignatureKey(key, dateStamp, regionName, serviceName)
  kDate    = OpenSSL::HMAC.digest('sha256', "AWS4" + key, dateStamp)
  kRegion  = OpenSSL::HMAC.digest('sha256', kDate, regionName)
  kService = OpenSSL::HMAC.digest('sha256', kRegion, serviceName)
  kSigning = OpenSSL::HMAC.digest('sha256', kService, "aws4_request")
  kSigning
end

access_key = "access_key_goes_here"
secret_key = "secret_goes_here"

# Task 1: Create a Canonical Request For Signature Version 4
# http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
signed_headers = 'content-type;host;x-amz-content-sha256;x-amz-date'
payload_hash = OpenSSL::Digest.new("sha256").hexdigest("{'Input':{'Data':#{query}}}")
canonical_headers = ['content-type:application/json',
                     'host:' + host, "x-amz-content-sha256:#{payload_hash}",
                     'x-amz-date:' + amzdate].join("\n") + "\n"

canonical_request = [method, canonical_uri, canonical_headers,
                     signed_headers, payload_hash].join("\n")


# Task 2: Create a String to Sign for Signature Version 4
# http://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
algorithm = 'AWS4-HMAC-SHA256'
credential_scope = [datestamp, region, service_string, 'aws4_request'].join("/")
string_to_sign = [
  algorithm, amzdate, credential_scope,
  OpenSSL::Digest.new("sha256").hexdigest(canonical_request)
].join("\n")


# Task 3: Calculate the AWS Signature Version 4
# http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html
signing_key = getSignatureKey(secret_key, datestamp, region, service_string)


# Task 4: Add the Signing Information to the Request
# http://docs.aws.amazon.com/general/latest/gr/sigv4-add-signature-to-request.html

signature = OpenSSL::HMAC.hexdigest('sha256', signing_key, string_to_sign)

puts signature

uri = URI.parse(endpoint)
https = Net::HTTP.new(uri.host,uri.port)
https.use_ssl = true
https.set_debug_output($stdout)
request = Net::HTTP::Post.new(uri.request_uri)
request.body = "{'Input':{'Data':#{query}}}"
auth = "#{algorithm} Credential=#{access_key + '/' + credential_scope}, SignedHeaders=#{signed_headers}, Signature=#{signature}"

request.add_field 'Content-Type', "application/json"
request.add_field 'X-Amz-Date', amzdate
request.add_field 'X-Amz-Content-Sha256', payload_hash
request.add_field 'Authorization', auth
request.add_field 'Content-Length', "32"

https.request(request)
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