ConfigurationManager 具有 AppSettings 名称-值集合，但 CloudConfigurationManager 只有 GetSetting(string) 方法，如果您知道密钥，则可以在其中 1 个 1 获取配置设置。
有没有办法获取角色运行时的整个配置？
根本原因是我想进行强类型配置，以便将其抽象出来并使我的代码更具可测试性。直接使用 CloudConfigurationManager 是隐式依赖项，我想用我想在测试中存根的抽象来删除它。所以我觉得这很实用。这让我想到了我的问题。
我不想使用像 fx.configuration.azure 这样的库，因为我必须完全携带它的依赖项，因为它需要继承基类。
【问题讨论】：
标签： azure azure-web-roles azure-configuration
这是一个更新的实现，它会注意您是否在模拟器中运行以及是否在本地 Web 服务器中运行。返回字典后，Castle.DictionaryAdapter 可以轻松地将其从整个应用程序中抽象出来。我在 GitHub here 上将代码作为模板项目共享。摘录如下：
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Security.Cryptography.X509Certificates;
using System.Xml;
using System.Xml.Linq;
using Castle.Components.DictionaryAdapter;
using Core.Configuration.Interfaces;
using Microsoft.Azure;
using Microsoft.WindowsAzure.Management.Compute;
using Microsoft.WindowsAzure.Management.Compute.Models;
using Microsoft.WindowsAzure.ServiceRuntime;
namespace Core.Configuration
{
public class AzureServiceConfigurationProvider : IAzureServiceConfigurationProvider
{
private readonly string _subscriptionId;
// The Base64 Encoded Management Certificate string from Azure Publish Settings file
// download from https://manage.windowsazure.com/publishsettings/index
private readonly string _managementCertContents;
private readonly string _cloudServiceName;
private readonly string _serviceConfigurationNamespace;
public DefaultAzureServiceConfigurationProvider(IWebConfigSettings webConfigSettings)
{
_subscriptionId = webConfigSettings.SubscriptionId;
_managementCertContents = webConfigSettings.ManagementCertContents;
_cloudServiceName = webConfigSettings.CloudServiceName;
_serviceConfigurationNamespace = webConfigSettings.ServiceConfigurationNamespace;
}
public Dictionary<string, Dictionary<string, string>> GetConfigRaw()
{
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigRaw->Start");
var configuration = new Dictionary<string, Dictionary<string, string>>();
var configXml = GetConfigXml();
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigRaw->XmlExtracted");
var roles = configXml.Descendants(XName.Get("Role", _serviceConfigurationNamespace));
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigRaw->Roles : ");
foreach(var role in roles)
{
var roleConfiguration = new Dictionary<string, string>();
var roleName = role.Attribute("name").Value;
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigRaw->RoleName : " + roleName);
var configurationSettings = role.Element(XName.Get("ConfigurationSettings", _serviceConfigurationNamespace));
if (configurationSettings == null)
{
throw new InvalidOperationException("configurationSettings is null");
}
foreach(var element in configurationSettings.Elements(XName.Get("Setting", _serviceConfigurationNamespace)))
{
var settingName = element.Attribute("name").Value;
var settingValue = element.Attribute("value").Value;
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigRaw->settingName : " + settingName + " settingValue : " + settingValue);
roleConfiguration.Add(settingName, settingValue);
}
configuration.Add(roleName, roleConfiguration);
}
return configuration;
}
public IAzureServiceConfiguration GetConfig()
{
var configFactory = new DictionaryAdapterFactory();
IAzureServiceConfiguration config;
try
{
var rawAzureServiceConfig = GetConfigRaw();
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfig :");
var rawAzureWebServiceConfig = rawAzureServiceConfig["Core.Web"];
config = configFactory.GetAdapter<IAzureServiceConfiguration>(rawAzureWebServiceConfig);
config = ComplementConfigurationFromConfigurationManager(config);
}
catch(Exception exception)
{
// happens in some projects when using Full Emulator
// so we fallback to cloudconfigurationmanager
// this is not bad since we have isolated it in configuration assembly
Trace.WriteLine(exception.Message);
Trace.WriteLine(exception.StackTrace);
Hashtable hashConfig = GetConfigFromConfigurationManager();
config = configFactory.GetAdapter<IAzureServiceConfiguration>(hashConfig);
}
return config;
}
private IAzureServiceConfiguration ComplementConfigurationFromConfigurationManager(IAzureServiceConfiguration config)
{
Trace.WriteLine("Complementing configuration");
var azureConfigType = config.GetType();
foreach(PropertyInfo property in config.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly))
{
var xmlConfigValue = CloudConfigurationManager.GetSetting(property.Name);
var liveConfigPropValue = (string)azureConfigType.GetProperty(property.Name).GetValue(config, null);
if(string.IsNullOrEmpty(liveConfigPropValue))
{
Trace.WriteLine(property.Name + " in live config is empty. Complementing with '" + xmlConfigValue + "' from ConfigurationManager.");
property.SetValue(config, xmlConfigValue);
}
// do something with the property
}
return config;
}
private Hashtable GetConfigFromConfigurationManager()
{
Hashtable hashConfig = new Hashtable();
var configProperties = typeof(IAzureServiceConfiguration).GetProperties();
foreach(PropertyInfo prop in configProperties)
{
hashConfig.Add(prop.Name, CloudConfigurationManager.GetSetting(prop.Name));
}
return hashConfig;
}
private XElement GetConfigXml()
{
XElement configXml = null;
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigXml");
if(!RoleEnvironment.IsAvailable/*as local web project*/ || RoleEnvironment.IsEmulated /*as azure emulator project*/)
{
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigXml->!RoleEnvironment.IsAvailable || RoleEnvironment.IsEmulated");
try
{
var localConfigFile =
new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory).Parent.EnumerateFiles(
"*Local.cscfg", SearchOption.AllDirectories).FirstOrDefault();
XmlDocument doc = new XmlDocument();
doc.Load(localConfigFile.FullName);
configXml = XElement.Parse(doc.InnerXml);
}
catch(Exception exception) // happens in some projects when using Full Emulator
{
Trace.WriteLine(exception.Message);
Trace.WriteLine(exception.StackTrace);
throw; // intended - just marking - will catch it above
}
}
else
{
Trace.WriteLine("DefaultAzureServiceConfigurationProvider->GetConfigXml->RoleEnvironment ->in cloud");
var managementCertificate = new X509Certificate2(Convert.FromBase64String(_managementCertContents));
var credentials = new CertificateCloudCredentials(_subscriptionId, managementCertificate);
var computeManagementClient = new ComputeManagementClient(credentials);
var response = computeManagementClient.HostedServices.GetDetailed(_cloudServiceName);
var deployment = response.Deployments.FirstOrDefault(d => d.DeploymentSlot == DeploymentSlot.Production);
if(deployment != null)
{
var config = deployment.Configuration;
configXml = XElement.Parse(config);
}
}
return configXml;
}
}
internal static class TypeHelpers
{
public static bool IsNumber(this object value)
{
return value is sbyte
|| value is byte
|| value is short
|| value is ushort
|| value is int
|| value is uint
|| value is long
|| value is ulong
|| value is float
|| value is double
|| value is decimal;
}
public static bool IsString(this object value)
{
return value is string;
}
}
}
【讨论】：
AFAIK，没有直接的方法可以为您提供此信息。
但是，您可以使用一种解决方法。它涉及使用服务管理 API 的Get Deployment 操作。此操作将返回一个 XML，其中一个元素是 Configuration，其中包含 Base64 编码格式的服务配置文件。您可以读取此元素，将其转换为字符串并解析 XML 以获取 ConfigurationSettings 元素。它的子元素包含所有设置。
为此，您可以在服务管理 REST API 上编写自己的包装器，也可以使用 Azure Management Library。
更新
下面是一个示例代码，用于列出来自Service Configuration File 的所有配置设置，使用Azure Management Library。这是一个简单的控制台应用程序，在很短的时间内组合在一起，因此有很大的改进空间:)。对于管理证书，我使用了 Publish Setting File 中的数据。
您只需在控制台应用程序中安装Azure Management Library Nuget 包：
安装包 Microsoft.WindowsAzure.Management.Libraries
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.Management.Compute;
using System.Security.Cryptography.X509Certificates;
using System.Xml.Linq;
namespace ReadConfigurationSettingsUsingAzureManagementLibrary
{
class Program
{
static string subscriptionId = "<subscription-id>";
static string managementCertContents = "<Base64 Encoded Management Certificate String from Publish Setting File>";//Certificate string from Azure Publish Settings file
static string cloudServiceName = "<your cloud service name>";
static string ns = "http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration";
static void Main(string[] args)
{
var managementCetificate = new X509Certificate2(Convert.FromBase64String(managementCertContents));
var credentials = new CertificateCloudCredentials(subscriptionId, managementCetificate);
var computeManagementClient = new ComputeManagementClient(credentials);
var response = computeManagementClient.HostedServices.GetDetailed(cloudServiceName);
var deployment = response.Deployments.FirstOrDefault(d => d.DeploymentSlot == Microsoft.WindowsAzure.Management.Compute.Models.DeploymentSlot.Production);
if (deployment != null)
{
var config = deployment.Configuration;
XElement configXml = XElement.Parse(config);
var roles = configXml.Descendants(XName.Get("Role", ns));
foreach (var role in roles)
{
Console.WriteLine(role.Attribute("name").Value);
Console.WriteLine("-----------------------------");
var configurationSettings = role.Element(XName.Get("ConfigurationSettings", ns));
foreach (var element in configurationSettings.Elements(XName.Get("Setting", ns)))
{
var settingName = element.Attribute("name").Value;
var settingValue = element.Attribute("value").Value;
Console.WriteLine(string.Format("{0} = {1}", settingName, settingValue));
}
Console.WriteLine("==========================================");
}
}
Console.ReadLine();
}
}
}
【讨论】：