private HttpRequestMessage CreateHttpRequest(ProxyMethodDescriptor methodDescriptor, RequestDescriptor requestDescriptor)
{
HttpRequestMessage requestMessage = new HttpRequestMessage();
var headers = new Dictionary <string, string>();
if (!string.IsNullOrEmpty(requestDescriptor.ClientIp))
{
headers.Add("X-Forwarded-For", requestDescriptor.ClientIp);
}
if (!string.IsNullOrEmpty(requestDescriptor.UserAgent))
{
headers.Add("User-Agent", requestDescriptor.UserAgent);
}
if (requestDescriptor.Culture != null)
{
headers.Add("Accept-Language", requestDescriptor.Culture.Name);
}
headers.Merge(_headerProvider.Headers, true);
headers.Merge(methodDescriptor.Headers, true);
foreach (KeyValuePair <string, string> entry in headers)
{
requestMessage.Headers.Add(entry.Key, entry.Value);
}
return(requestMessage);
}
public RequestContext(HttpRequestMessage request,
ProxyMethodDescriptor methodDescriptor,
string regionKey,
TimeSpan?timeout = null)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (methodDescriptor == null)
{
throw new ArgumentNullException(nameof(methodDescriptor));
}
if (!regionKey.HasValue())
{
throw new ArgumentNullException(nameof(regionKey));
}
Request = request;
MethodDescriptor = methodDescriptor;
RegionKey = regionKey;
Timeout = timeout;
}
public UriBuilder CreateUriBuilder(ProxyMethodDescriptor methodDescriptor, string route, string regionKey, string targetMethodName)
{
var uriBuilder = RoundRobinManager.RoundRobinUri(regionKey);
if (uriBuilder == null)
{
throw new ArgumentNullException(nameof(uriBuilder));
}
if (targetMethodName.ToLower() == HttpMethod.Get.Method.ToLower())
{
var path = uriBuilder.Path ?? string.Empty;
path += string.IsNullOrEmpty(route) ? "" : $"{route}/";
uriBuilder.Path = path;
}
else
{
if (targetMethodName.StartsWith("/"))
{
targetMethodName = targetMethodName.Substring(1);
}
ResolveTemplate(uriBuilder, methodDescriptor, route, targetMethodName);
}
return(uriBuilder);
}
private void ResolveTemplate(UriBuilder uriBuilder, ProxyMethodDescriptor methodDescriptor, string route, string targetMethodName)
{
var path = uriBuilder.Path ?? string.Empty;
if (methodDescriptor.RouteTemplate != null)
{
if (methodDescriptor.RouteTemplate.Parameters.Count > 0)
{
var methodName = string.Join("/", methodDescriptor.TemplateKeys);
path += ConcatRoute(route, methodName);
uriBuilder.Path = path;
return;
}
}
path += ConcatRoute(route, targetMethodName);
uriBuilder.Path = path;
}
protected virtual void EnsureTemplate(ProxyMethodDescriptor descriptor,
ProxyUriDefinition proxyUriDefinition,
RequestContext requestContext,
IDictionary <string, object> argsDic,
List <string> keys)
{
if (descriptor.Template.HasValue())
{
if (proxyUriDefinition.HasParameter)
{
for (int i = 0; i < proxyUriDefinition.ParameterParts.Count; i++)
{
var key = keys[i];
proxyUriDefinition.UriBuilder.Path += ($"/{WebUtility.UrlEncode(requestContext.Args[i]?.ToString())}");
argsDic.Remove(key);
}
}
}
}
public async Task CreateRequestContentAsync(RequestDescriptor requestContext,
HttpRequestMessage request,
ProxyMethodDescriptor descriptor,
UriBuilder uriBuilder)
{
await Task.CompletedTask;
var httpMethod = descriptor.HttpMethod;
var contentModelBinder = ContentBinderFactory.GetContentModelBinder(_serviceProvider, httpMethod, descriptor.ContentType);
var bindingContext = new ContentModelBindingContext(httpMethod, descriptor, uriBuilder)
{
ContentType = descriptor.ContentType,
ModelContentResolver = ContentResolver,
Args = requestContext.Args,
};
contentModelBinder.BindContent(bindingContext);
bindingContext.TrySetContent(request);
request.RequestUri = bindingContext.Uri;
}
public async Task CreateRequestContentAsync(RequestContext requestContext,
HttpRequestMessage request,
ProxyMethodDescriptor descriptor,
ProxyUriDefinition proxyUriDefinition)
{
await Task.CompletedTask;
var uriBuilder = proxyUriDefinition.UriBuilder;
var argsDic = descriptor.Resolve(requestContext.Args);
var argsCount = argsDic.Count;
var keys = new List <string>(argsDic.Keys);
if (descriptor.HttpMethod == HttpMethod.Post)
{
if (descriptor.IsMultiPartFormData)
{
request.Content = GetMultipartFormDataContent(argsDic);
return;
}
if (argsCount == 1)
{
request.Content = SerializeToString(argsDic.First().Value);
}
else
{
request.Content = SerializeToString(argsDic);
}
return;
}
else if (descriptor.HttpMethod == HttpMethod.Put)
{
EnsureTemplate(descriptor, proxyUriDefinition, requestContext, argsDic, keys);
argsCount = argsDic.Count;
request.RequestUri = uriBuilder.Uri;
if (argsCount == 1)
{
request.Content = SerializeToString(argsDic.First().Value);
}
else if (argsCount == 2)
{
var firstParameter = argsDic[keys[0]];
var secondParameter = argsDic[keys[1]];
// PUT Request first parameter should be Id or Key
if (firstParameter.GetType().IsPrimitive())
{
uriBuilder.Query += string.Format("&{0}={1}", keys[0], firstParameter);
}
request.RequestUri = uriBuilder.Uri;
request.Content = SerializeToString(secondParameter);
}
}
if (descriptor.HttpMethod == HttpMethod.Get || descriptor.HttpMethod == HttpMethod.Delete)
{
EnsureTemplate(descriptor, proxyUriDefinition, requestContext, argsDic, keys);
request.RequestUri = QueryStringResolver.Parse(uriBuilder, argsDic);
}
}
public ContentModelBindingContext(HttpMethod httpMethod, ProxyMethodDescriptor methodDescriptor, UriBuilder uriBuilder)
{
HttpMethod = httpMethod ?? throw new ArgumentNullException(nameof(httpMethod));
MethodDescriptor = methodDescriptor ?? throw new ArgumentNullException(nameof(methodDescriptor));
UriBuilder = uriBuilder ?? throw new ArgumentNullException(nameof(uriBuilder));
}
