| #region Copyright notice and license |
| |
| // Copyright 2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #endregion |
| |
| using System; |
| using System.Text.RegularExpressions; |
| using System.Threading.Tasks; |
| |
| namespace Grpc.Core |
| { |
| /// <summary> |
| /// Interceptor for call headers. |
| /// </summary> |
| public delegate void HeaderInterceptor(IMethod method, string authUri, Metadata metadata); |
| |
| /// <summary> |
| /// Base class for client-side stubs. |
| /// </summary> |
| public abstract class ClientBase |
| { |
| // Regex for removal of the optional DNS scheme, trailing port, and trailing backslash |
| static readonly Regex ChannelTargetPattern = new Regex(@"^(dns:\/{3})?([^:\/]+)(:\d+)?\/?$"); |
| |
| readonly Channel channel; |
| readonly string authUriBase; |
| |
| public ClientBase(Channel channel) |
| { |
| this.channel = channel; |
| this.authUriBase = GetAuthUriBase(channel.Target); |
| } |
| |
| /// <summary> |
| /// Can be used to register a custom header (request metadata) interceptor. |
| /// The interceptor is invoked each time a new call on this client is started. |
| /// </summary> |
| public HeaderInterceptor HeaderInterceptor |
| { |
| get; |
| set; |
| } |
| |
| /// <summary> |
| /// gRPC supports multiple "hosts" being served by a single server. |
| /// This property can be used to set the target host explicitly. |
| /// By default, this will be set to <c>null</c> with the meaning |
| /// "use default host". |
| /// </summary> |
| public string Host |
| { |
| get; |
| set; |
| } |
| |
| /// <summary> |
| /// Channel associated with this client. |
| /// </summary> |
| public Channel Channel |
| { |
| get |
| { |
| return this.channel; |
| } |
| } |
| |
| /// <summary> |
| /// Creates a new call to given method. |
| /// </summary> |
| protected CallInvocationDetails<TRequest, TResponse> CreateCall<TRequest, TResponse>(Method<TRequest, TResponse> method, CallOptions options) |
| where TRequest : class |
| where TResponse : class |
| { |
| var interceptor = HeaderInterceptor; |
| if (interceptor != null) |
| { |
| if (options.Headers == null) |
| { |
| options = options.WithHeaders(new Metadata()); |
| } |
| var authUri = authUriBase != null ? authUriBase + method.ServiceName : null; |
| interceptor(method, authUri, options.Headers); |
| } |
| return new CallInvocationDetails<TRequest, TResponse>(channel, method, Host, options); |
| } |
| |
| /// <summary> |
| /// Creates Auth URI base from channel's target (the one passed at channel creation). |
| /// Fully-qualified service name is to be appended to this. |
| /// </summary> |
| internal static string GetAuthUriBase(string target) |
| { |
| var match = ChannelTargetPattern.Match(target); |
| if (!match.Success) { |
| return null; |
| } |
| return "https://" + match.Groups[2].Value + "/"; |
| } |
| } |
| } |