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137 lines (113 loc) · 4.83 KB
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using Microsoft.Extensions.Options;
using NetCoreStack.Proxy.Extensions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
namespace NetCoreStack.Proxy
{
internal class ProxyManager : IProxyManager
{
private readonly IProxyTypeManager _typeManager;
private readonly IHttpClientAccessor _httpClientAccessor;
private readonly IOptions<ProxyOptions> _options;
private readonly IDefaultHeaderProvider _headerProvider;
private readonly IProxyEndpointManager _endpointManager;
private readonly IProxyContentStreamProvider _streamProvider;
public ProxyManager(IProxyTypeManager typeManager,
IDefaultHeaderProvider headerProvider,
IHttpClientAccessor httpClientAccessor,
IProxyEndpointManager endpointManager,
IProxyContentStreamProvider streamProvider,
IOptions<ProxyOptions> options,
IEnumerable<IProxyRequestFilter> requestFilters)
{
if (typeManager == null)
{
throw new ArgumentNullException(nameof(typeManager));
}
if (headerProvider == null)
{
throw new ArgumentNullException(nameof(headerProvider));
}
if (httpClientAccessor == null)
{
throw new ArgumentNullException(nameof(httpClientAccessor));
}
if (endpointManager == null)
{
throw new ArgumentNullException(nameof(endpointManager));
}
if (streamProvider == null)
{
throw new ArgumentNullException(nameof(endpointManager));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_typeManager = typeManager;
_headerProvider = headerProvider;
_httpClientAccessor = httpClientAccessor;
_endpointManager = endpointManager;
_streamProvider = streamProvider;
_options = options;
RequestFilters = new List<IProxyRequestFilter>();
if (requestFilters != null && requestFilters.Any())
{
HasFilter = true;
RequestFilters = requestFilters.ToList();
}
}
public HttpClient HttpClient
{
get
{
return _httpClientAccessor.HttpClient;
}
}
public bool HasFilter { get; }
public List<IProxyRequestFilter> RequestFilters { get; }
private HttpRequestMessage CreateHttpRequest(ProxyMethodDescriptor methodDescriptor)
{
HttpRequestMessage requestMessage = new HttpRequestMessage();
foreach (KeyValuePair<string, string> entry in _headerProvider.Headers)
{
requestMessage.Headers.Add(entry.Key, entry.Value);
}
foreach (KeyValuePair<string, string> entry in methodDescriptor.Headers)
{
requestMessage.Headers.Add(entry.Key, entry.Value);
}
return requestMessage;
}
public async Task<RequestContext> CreateRequestAsync(RequestDescriptor descriptor)
{
var proxyDescriptor = _typeManager.ProxyDescriptors.FirstOrDefault(x => x.ProxyType == descriptor.ProxyType);
if (proxyDescriptor == null)
throw new ArgumentOutOfRangeException("Proxy type could not be found!");
var regionKey = proxyDescriptor.RegionKey;
ProxyMethodDescriptor methodDescriptor;
if (!proxyDescriptor.Methods.TryGetValue(descriptor.TargetMethod, out methodDescriptor))
throw new ArgumentOutOfRangeException("Method (Action) info could not be found!");
HttpRequestMessage request = CreateHttpRequest(methodDescriptor);
request.Method = methodDescriptor.HttpMethod;
var methodPath = descriptor.TargetMethod.Name;
if (methodDescriptor.MethodMarkerTemplate.HasValue())
methodPath = methodDescriptor.MethodMarkerTemplate;
ProxyUriDefinition proxyUriDefinition = _endpointManager.CreateUriDefinition(methodDescriptor, proxyDescriptor.Route, regionKey, methodPath);
TimeSpan? timeout = methodDescriptor.Timeout;
request.RequestUri = proxyUriDefinition.UriBuilder.Uri;
await _streamProvider.CreateRequestContentAsync(descriptor, request, methodDescriptor, proxyUriDefinition);
return new RequestContext(request,
methodDescriptor,
proxyDescriptor.RegionKey,
timeout);
}
public HttpClient GetHttpClient()
{
return _httpClientAccessor.HttpClient;
}
}
}