Class: HttpClient

Inherits:
Object
  • Object
show all
Defined in:
lib/secured_cloud_api_client/http_client.rb

Overview

Class HttpClient performs HTTP requests to the Secured Cloud API Server. Authentication is handled via the supplied application key and shared secret.

This class expects the pem file “/cert/sc.pem” to be found in the working directory of the application using this library. This pem file is used for SSL validation.

@author

Alan Vella

Constant Summary collapse

APP_CONTENT_TYPE = 
"application/vnd.securedcloud.v7.0+json"
AUTH_SCHEME = 
"SC "
PEM_FILE_PATH = 
Dir.pwd + "/cert/sc.pem"

Class Method Summary collapse

Class Method Details

.createAuthorization(method, url) ⇒ Object

Creates authorization header for a given method and URL.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 257

def self.createAuthorization(method, url)
  stringToSign = method + " " + removeServletName(url) + " " + @applicationKey
  hash = OpenSSL::HMAC.digest('sha256', @sharedSecret, stringToSign)
  requestSignature = Base64.encode64(hash).gsub(/\s+/, ' ').strip    
  credentials = @applicationKey + ":" + requestSignature;    
  encodedCredentials = Base64.encode64(credentials).gsub(/\s+/, ' ').strip
  return encodedCredentials
end

.handleResponseError(response) ⇒ Object

Raise error if response is not successful.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 35

def self.handleResponseError(response)
  
  if ((response.code != "202") && (response.code != "200")) then
    
    errorMsg = ""
    
    if ((response['X-Application-Error-Reference'] != nil) && (response['X-Application-Error-Reference'] != "")) then
      errorMsg = response['X-Application-Error-Reference']
    end
    if ((response['X-Application-Error-Description'] != nil) && (response['X-Application-Error-Description'] != "")) then
      errorMsg = response['X-Application-Error-Description']
    end
    
    if (errorMsg == "") then
      errorMsg = "Error " + response.code.to_str() + " " + response.body()
    else
      errorMsg = "Error " + response.code.to_str() +  " " + errorMsg  
    end
    
    raise errorMsg
  end
end

.removeServletName(url) ⇒ Object

Removes the servlet name from a given external API URL.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 246

def self.removeServletName(url)
  urlAsArray = url.split("/");
  newURL = ""
  for i in 4..(urlAsArray.size() - 1)
    newURL += "/" + urlAsArray[i]
  end
  return newURL
end

.runChecks ⇒ Object

Run checks before issuing request.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 26

def self.runChecks
  if !(File.exists?(PEM_FILE_PATH)) then
    raise "A valid pem file named sc.pem is required for SSL validation. This file must be placed in the cert directory of your vagrant workspace."
  end
end

.sendDELETERequest(authInfo, url, params = nil) ⇒ Object

Sends an HTTP DELETE request and returns response.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 142

def self.sendDELETERequest(authInfo, url, params = nil)
  
  self.runChecks
  
  begin
  
    @applicationKey = authInfo.getApplicationKey()
    @sharedSecret = authInfo.getSharedSecret()
  
    #Add parameters if present

    if (params != nil) then
      url += "?"
      params.each do |param|
        url += param[0] + "=" + param[1] + "&"
      end
    
      #Remove last ampersand

      url = url[0...-1]
    end
  
    @url = URI.parse(url)
      
    #Setup SSL validation.

    http = Net::HTTP.new(@url.host, @url.port)
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_PEER
    http.cert_store = OpenSSL::X509::Store.new
    http.cert_store.set_default_paths
    http.cert_store.add_file(PEM_FILE_PATH)
     
    #Create and execute request

    request = Net::HTTP::Delete.new(@url.request_uri)
    request['Accept'] = APP_CONTENT_TYPE  
    request['Content-Type'] = APP_CONTENT_TYPE
    request['Authorization'] = AUTH_SCHEME + createAuthorization("DELETE", url)
    response = http.request(request)  
    
    rescue Exception => e  
      raise "Error creating API request: " + e.message
  
  end  
  
  #Raise error if response is not successful.

  self.handleResponseError(response)
  
  #Return response.

  return response
  
end

.sendGETRequest(authInfo, url) ⇒ Object

Sends an HTTP GET request and returns response.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 60

def self.sendGETRequest(authInfo, url)

  self.runChecks

  begin
    
    @applicationKey = authInfo.getApplicationKey()
    @sharedSecret = authInfo.getSharedSecret()
  
    @url = URI.parse(url)
      
    #Setup SSL validation.

    http = Net::HTTP.new(@url.host, @url.port)
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_PEER
    http.cert_store = OpenSSL::X509::Store.new
    http.cert_store.set_default_paths
    http.cert_store.add_file(PEM_FILE_PATH)
     
    #Create and execute request

    request = Net::HTTP::Get.new(@url.request_uri)
    request['Accept'] = APP_CONTENT_TYPE  
    request['Authorization'] = AUTH_SCHEME + createAuthorization("GET", url)
    response = http.request(request)
    
    rescue Exception => e  
      raise "Error creating API request: " + e.message
    
  end    
  
  #Raise error if response is not successful.

  self.handleResponseError(response)
  
  #Return response.

  return response
end

.sendPOSTRequest(authInfo, url, body) ⇒ Object

Sends an HTTP POST request and returns response.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 101

def self.sendPOSTRequest(authInfo, url, body)
  
  self.runChecks
  
  begin
  
    @applicationKey = authInfo.getApplicationKey()
    @sharedSecret = authInfo.getSharedSecret()
  
    @url = URI.parse(url)
      
    #Setup SSL validation.

    http = Net::HTTP.new(@url.host, @url.port)
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_PEER
    http.cert_store = OpenSSL::X509::Store.new
    http.cert_store.set_default_paths
    http.cert_store.add_file(PEM_FILE_PATH)
     
    #Create and execute request

    request = Net::HTTP::Post.new(@url.request_uri)
    request['Accept'] = APP_CONTENT_TYPE  
    request['Content-Type'] = APP_CONTENT_TYPE
    request['Authorization'] = AUTH_SCHEME + createAuthorization("POST", url)
    request.body = body
    response = http.request(request)
    
    rescue Exception => e  
      raise "Error creating API request: " + e.message    
  
  end
  
  #Raise error if response is not successful.

  self.handleResponseError(response)
  
  #Return response.

  return response
end

.sendPUTRequest(authInfo, url, params = nil) ⇒ Object

Sends an HTTP PUT request and returns response.



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# File 'lib/secured_cloud_api_client/http_client.rb', line 194

def self.sendPUTRequest(authInfo, url, params = nil)
  
  self.runChecks
  
  begin
  
    @applicationKey = authInfo.getApplicationKey()
    @sharedSecret = authInfo.getSharedSecret()
  
    #Add parameters if present

    if (params != nil) then
      url += "?"
      params.each do |param|
        url += param[0] + "=" + param[1] + "&"
      end
    
      #Remove last ampersand

      url = url[0...-1]
    end
  
    @url = URI.parse(url)
      
    #Setup SSL validation.

    http = Net::HTTP.new(@url.host, @url.port)
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_PEER
    http.cert_store = OpenSSL::X509::Store.new
    http.cert_store.set_default_paths
    http.cert_store.add_file(PEM_FILE_PATH)
     
    #Create and execute request

    request = Net::HTTP::Put.new(@url.request_uri)
    request['Accept'] = APP_CONTENT_TYPE  
    request['Content-Type'] = APP_CONTENT_TYPE
    request['Authorization'] = AUTH_SCHEME + createAuthorization("PUT", url)
    response = http.request(request)
    
    rescue Exception => e  
      raise "Error creating API request: " + e.message
      
  end    
  
  #Raise error if response is not successful.

  self.handleResponseError(response)
  
  #Return response.

  return response
  
end