Updating DropboxAuthenticatedContext.cs and DropboxAuthennticationHandler.cs to use the Dropbox v2 API as they're shutting down their v1 API: https://blogs.dropbox.com/developers/2017/09/api-v1-shutdown-details/ (#216)

As per issue: https://github.com/TerribleDev/OwinOAuthProviders/issues/215

Gemfile.lock

@@ -23,4 +23,4 @@ DEPENDENCIES
   os
 
 BUNDLED WITH
-   1.12.1
+   1.13.7

Rakefile.rb

@@ -9,13 +9,13 @@ require 'nokogiri'
 require 'openssl'
 import 'nuget.rake'
 
-CLEAN.include(['src/**/obj', 'src/**/bin', 'tool', 'packages/**','src/**/*.nuspec', 'src/**/*.nupkg', 'tools', 'packages', '*.nupkg'])
+CLEAN.include(['src/**/obj', 'Owin.Security.Providers.nuspec', 'Owin.Security.Providers-signed.nuspec' 'src/**/bin', 'tool', 'packages/**','src/**/*.nuspec', 'src/**/*.nupkg', 'tools', 'packages', '*.nupkg'])
 Configuration = ENV['CONFIGURATION'] || 'Release'
 PACKAGES = File.expand_path("packages")
 TOOLS = File.expand_path("tools")
 NUGET = File.expand_path("#{TOOLS}/nuget")
 NUGET_EXE = File.expand_path("#{TOOLS}/nuget/nuget.exe")
-@version = "2.14.0"
+@version = "2.15.1"
 PROJECTS = Dir.glob('src/*').select{|dir| File.directory? dir }
 
 desc 'Retrieve things'
@@ -27,15 +27,19 @@ task :build => [:retrieve, :compile]
 desc 'clean, retrieve, build, generate nuspecs'
 task :preflight => [:clean, :build, :nuspec_gen]
 
+
 desc 'publish'
 task :publish => [:preflight,:nuspec_gen, :nuspec_pack,  :nuspec_publish]
 
+
+
 build :compile do |t|
   t.prop 'Configuration', Configuration
   t.sln = 'OwinOAuthProviders.sln'
+  t.prop 'SignAssembly', 'true'
+  t.prop 'AssemblyOriginatorKeyFile', File.expand_path("keypair.snk")
 end
 
-
 desc "Generate nuspec files"
 task :nuspec_gen do
   template = ERB.new(File.read('nuspectemplate.nuspec.erb'))
@@ -50,6 +54,7 @@ task :nuspec_gen do
   File.write('Owin.Security.Providers.nuspec', ERB.new(File.read('global.nuspec.erb')).result())
 end
 
+
 desc 'pack nuspec files'
 task :nuspec_pack do
   PROJECTS.each{|dir|
@@ -60,6 +65,7 @@ task :nuspec_pack do
   sh "#{NUGET_EXE} pack Owin.Security.Providers.nuspec -Exclude \"**\""
 end
 
+
 desc 'publish nugets'
 task :nuspec_publish do
   PROJECTS.each{|dir|

base/Owin.Security.Providers.OpenIDBase/Owin.Security.Providers.OpenIDBase.csproj

@@ -89,6 +89,10 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\keypair.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

base/Owin.Security.Providers.OpenIDBase/Owin.Security.Providers.OpenIDBase.nuspec

@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>Owin.Security.Providers.OpenIDBase</id>
-    <version>2.1</version>
+    <version>2.1.1</version>
     <authors>Jerrie Pelser, Tommy Parnell and contributors</authors>
     <owners>Tommy Parnell</owners>
     <licenseUrl>http://opensource.org/licenses/MIT</licenseUrl>

src/Owin.Security.Providers.Dropbox/DropboxAuthenticationHandler.cs

@@ -17,8 +17,9 @@ namespace Owin.Security.Providers.Dropbox
     {
         private const string StateCookie = "_DropboxState";
         private const string XmlSchemaString = "http://www.w3.org/2001/XMLSchema#string";
-        private const string TokenEndpoint = "https://api.dropbox.com/1/oauth2/token";
-        private const string UserInfoEndpoint = "https://api.dropbox.com/1/account/info";
+        private const string TokenEndpoint = "https://api.dropbox.com/oauth2/token";
+        private const string UserInfoEndpoint = "https://api.dropbox.com/2/users/get_current_account";
+
 
         private readonly ILogger _logger;
         private readonly HttpClient _httpClient;
@@ -65,13 +66,13 @@ namespace Owin.Security.Providers.Dropbox
                 var redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
 
                 // Build up the body for the token request
-                var body = new List<KeyValuePair<string, string>>
+                var body = new Dictionary<string, string>
                 {
-                    new KeyValuePair<string, string>("grant_type", "authorization_code"),
-                    new KeyValuePair<string, string>("code", code),
-                    new KeyValuePair<string, string>("redirect_uri", redirectUri),
-                    new KeyValuePair<string, string>("client_id", Options.AppKey),
-                    new KeyValuePair<string, string>("client_secret", Options.AppSecret)
+                    { "grant_type", "authorization_code" },
+                    { "code", code },
+                    {"redirect_uri", redirectUri },
+                    { "client_id", Options.AppKey },
+                    { "client_secret", Options.AppSecret }
                 };
 
                 // Request the token
@@ -85,8 +86,8 @@ namespace Owin.Security.Providers.Dropbox
                 var accessToken = (string)response.access_token;
 
                 // Get the Dropbox user
-                var graphResponse = await _httpClient.GetAsync(
-                    UserInfoEndpoint + "?access_token=" + Uri.EscapeDataString(accessToken), Request.CallCancelled);
+                _httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
+                var graphResponse = await _httpClient.PostAsync(UserInfoEndpoint, null);
                 graphResponse.EnsureSuccessStatusCode();
                 text = await graphResponse.Content.ReadAsStringAsync();
                 var user = JObject.Parse(text);
@@ -154,7 +155,7 @@ namespace Owin.Security.Providers.Dropbox
             GenerateCorrelationId(properties);
 
             var authorizationEndpoint =
-                "https://www.dropbox.com/1/oauth2/authorize" +
+                "https://www.dropbox.com/oauth2/authorize" +
                 "?response_type=code" +
                 "&client_id=" + Uri.EscapeDataString(Options.AppKey) +
                 "&redirect_uri=" + Uri.EscapeDataString(redirectUri);

src/Owin.Security.Providers.Dropbox/Provider/DropboxAuthenticatedContext.cs

@@ -25,7 +25,7 @@ namespace Owin.Security.Providers.Dropbox
             AccessToken = accessToken;
             User = user;
 
-            Id = TryGetValue(user, "uid");
+            Id = TryGetValue(user, "account_id");
             Name = TryGetValue(user, "display_name");
         }
 

src/Owin.Security.Providers.LinkedIn/LinkedInAuthenticationHandler.cs

@@ -61,7 +61,7 @@ namespace Owin.Security.Providers.LinkedIn
                     return new AuthenticationTicket(null, properties);
                 }
 
-                var requestPrefix = Request.Scheme + "://" + Request.Host;
+                var requestPrefix = Request.Scheme + "://" + this.GetHostName();
                 var redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
 
                 // Build up the body for the token request
@@ -173,7 +173,7 @@ namespace Owin.Security.Providers.LinkedIn
             var baseUri =
                 Request.Scheme +
                 Uri.SchemeDelimiter +
-                Request.Host +
+                this.GetHostName() +
                 Request.PathBase;
 
             var currentUri =
@@ -271,5 +271,15 @@ namespace Owin.Security.Providers.LinkedIn
 
             return context.IsRequestCompleted;
         }
+
+        /// <summary>
+        ///     Gets proxy host name from <see cref="LinkedInAuthenticationOptions"/> if it is set.
+        ///     If proxy host name is not set, gets application request host name.
+        /// </summary>
+        /// <returns>Host name.</returns>
+        private string GetHostName()
+        {
+            return string.IsNullOrWhiteSpace(Options.ProxyHost) ? Request.Host.ToString() : Options.ProxyHost;
+        }
     }
 }

src/Owin.Security.Providers.LinkedIn/LinkedInAuthenticationOptions.cs

@@ -43,6 +43,16 @@ namespace Owin.Security.Providers.LinkedIn
         /// </summary>
         public PathString CallbackPath { get; set; }
 
+        /// <summary>
+        ///     Gets or sets the middleware host name.
+        ///     The middleware processes the <see cref="CallbackPath"/> on this host name instead of the application's request host.
+        ///     If this is not set, the application's request host will be used.
+        /// </summary>
+        /// <remarks>
+        ///     Use this property when running behind a proxy.
+        /// </remarks>
+        public string ProxyHost { get; set; }
+
         /// <summary>
         ///     Get or sets the text that the user can display on a sign in user interface.
         /// </summary>

src/Owin.Security.Providers.OpenID/Owin.Security.Providers.OpenID.csproj

@@ -46,9 +46,8 @@
       <HintPath>..\..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="Owin.Security.Providers.OpenIDBase, Version=2.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\Owin.Security.Providers.OpenIDBase.2.1\lib\net45\Owin.Security.Providers.OpenIDBase.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="Owin.Security.Providers.OpenIDBase, Version=2.0.0.0, Culture=neutral, PublicKeyToken=1328b8c16b108c43, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Owin.Security.Providers.OpenIDBase.2.1.1\lib\net45\Owin.Security.Providers.OpenIDBase.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />

src/Owin.Security.Providers.OpenID/packages.config

@@ -4,5 +4,5 @@
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />
-  <package id="Owin.Security.Providers.OpenIDBase" version="2.1" targetFramework="net45" />
+  <package id="Owin.Security.Providers.OpenIDBase" version="2.1.1" targetFramework="net45" />
 </packages>

src/Owin.Security.Providers.Steam/Owin.Security.Providers.Steam.csproj

@@ -46,9 +46,8 @@
       <HintPath>..\..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="Owin.Security.Providers.OpenIDBase, Version=2.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\Owin.Security.Providers.OpenIDBase.2.1\lib\net45\Owin.Security.Providers.OpenIDBase.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="Owin.Security.Providers.OpenIDBase, Version=2.0.0.0, Culture=neutral, PublicKeyToken=1328b8c16b108c43, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Owin.Security.Providers.OpenIDBase.2.1.1\lib\net45\Owin.Security.Providers.OpenIDBase.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />

src/Owin.Security.Providers.Steam/packages.config

@@ -4,5 +4,5 @@
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />
-  <package id="Owin.Security.Providers.OpenIDBase" version="2.1" targetFramework="net45" />
+  <package id="Owin.Security.Providers.OpenIDBase" version="2.1.1" targetFramework="net45" />
 </packages>

src/Owin.Security.Providers.Wargaming/Owin.Security.Providers.Wargaming.csproj

@@ -46,9 +46,8 @@
       <HintPath>..\..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="Owin.Security.Providers.OpenIDBase, Version=2.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\Owin.Security.Providers.OpenIDBase.2.1\lib\net45\Owin.Security.Providers.OpenIDBase.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="Owin.Security.Providers.OpenIDBase, Version=2.0.0.0, Culture=neutral, PublicKeyToken=1328b8c16b108c43, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Owin.Security.Providers.OpenIDBase.2.1.1\lib\net45\Owin.Security.Providers.OpenIDBase.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />

src/Owin.Security.Providers.Wargaming/packages.config

@@ -4,5 +4,5 @@
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />
-  <package id="Owin.Security.Providers.OpenIDBase" version="2.1" targetFramework="net45" />
+  <package id="Owin.Security.Providers.OpenIDBase" version="2.1.1" targetFramework="net45" />
 </packages>