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/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/core/endpoint/DefaultEndpointProvider.h>
#include <aws/core/utils/memory/stl/AWSMap.h>
#include <aws/crt/Api.h>
namespace Aws
{
namespace Endpoint
{
/**
* Export endpoint provider symbols from DLL
*/
template class AWS_CORE_API DefaultEndpointProvider<Aws::Client::GenericClientConfiguration<false>,
Aws::Endpoint::BuiltInParameters,
Aws::Endpoint::ClientContextParameters>;
char CharToDec(const char c)
{
if(c >= '0' && c <= '9')
return c - '0';
if(c >= 'A' && c <= 'F')
return c - 'A' + 10;
if(c >= 'a' && c <= 'f')
return c - 'a' + 10;
return 0;
}
Aws::String PercentDecode(Aws::String inputString)
{
if (inputString.find_first_of("%") == Aws::String::npos)
{
return inputString;
}
Aws::String result;
result.reserve(inputString.size());
bool percentFound = false;
char firstOctet = 0;
char secondOctet = 0;
for(size_t i = 0; i < inputString.size(); ++i)
{
const char currentChar = inputString[i];
if ('%' == currentChar)
{
if (percentFound)
{
// not percent-encoded string
result += currentChar;
}
percentFound = true;
continue;
}
if (percentFound)
{
if ((currentChar >= '0' && currentChar <= '9') ||
(currentChar >= 'A' && currentChar <= 'F') ||
(currentChar >= 'a' && currentChar <= 'f'))
{
if(!firstOctet)
{
firstOctet = currentChar;
continue;
}
if(!secondOctet)
{
secondOctet = currentChar;
char encodedChar = CharToDec(firstOctet) * 16 + CharToDec(secondOctet);
result += encodedChar;
percentFound = false;
firstOctet = 0;
secondOctet = 0;
continue;
}
} else {
// Non-percent encoded sequence
result += '%';
if(!firstOctet)
result += firstOctet;
result += currentChar;
percentFound = false;
firstOctet = 0;
secondOctet = 0;
continue;
}
}
if ('+' == currentChar)
{
result += ' ';
continue;
}
result += currentChar;
}
return result;
}
AWS_CORE_API ResolveEndpointOutcome
ResolveEndpointDefaultImpl(const Aws::Crt::Endpoints::RuleEngine& ruleEngine,
const EndpointParameters& builtInParameters,
const EndpointParameters& clientContextParameters,
const EndpointParameters& endpointParameters)
{
if(!ruleEngine) {
AWS_LOGSTREAM_FATAL(DEFAULT_ENDPOINT_PROVIDER_TAG, "Invalid CRT Rule Engine state");
return ResolveEndpointOutcome(
Aws::Client::AWSError<Aws::Client::CoreErrors>(
Aws::Client::CoreErrors::INTERNAL_FAILURE,
"",
"CRT Endpoint rule engine is not initialized",
false/*retryable*/));
}
Aws::Crt::Endpoints::RequestContext crtRequestCtx;
const Aws::Vector<std::reference_wrapper<const EndpointParameters>> allParameters
= {std::cref(builtInParameters), std::cref(clientContextParameters), std::cref(endpointParameters)};
for (const auto& parameterClass : allParameters)
{
for(const auto& parameter : parameterClass.get())
{
if(EndpointParameter::ParameterType::BOOLEAN == parameter.GetStoredType())
{
AWS_LOGSTREAM_TRACE(DEFAULT_ENDPOINT_PROVIDER_TAG, "Endpoint bool eval parameter: " << parameter.GetName() << " = " << parameter.GetBoolValueNoCheck());
crtRequestCtx.AddBoolean(Aws::Crt::ByteCursorFromCString(parameter.GetName().c_str()), parameter.GetBoolValueNoCheck());
}
else if(EndpointParameter::ParameterType::STRING == parameter.GetStoredType())
{
AWS_LOGSTREAM_TRACE(DEFAULT_ENDPOINT_PROVIDER_TAG, "Endpoint str eval parameter: " << parameter.GetName() << " = " << parameter.GetStrValueNoCheck());
crtRequestCtx.AddString(Aws::Crt::ByteCursorFromCString(parameter.GetName().c_str()), Aws::Crt::ByteCursorFromCString(parameter.GetStrValueNoCheck().c_str()));
}
else
{
return ResolveEndpointOutcome(
Aws::Client::AWSError<Aws::Client::CoreErrors>(
Aws::Client::CoreErrors::INVALID_QUERY_PARAMETER,
"",
"Invalid endpoint parameter type for parameter " + parameter.GetName(),
false/*retryable*/));
}
}
}
auto resolved = ruleEngine.Resolve(crtRequestCtx);
if(resolved.has_value())
{
if(resolved->IsError())
{
auto crtError = resolved->GetError();
Aws::String sdkCrtError = crtError ? Aws::String(crtError->begin(), crtError->end()) :
"CRT Rule engine resolution resulted in an unknown error";
return ResolveEndpointOutcome(
Aws::Client::AWSError<Aws::Client::CoreErrors>(
Aws::Client::CoreErrors::INVALID_PARAMETER_COMBINATION,
"",
sdkCrtError,
false/*retryable*/));
}
else if(resolved->IsEndpoint() && resolved->GetUrl())
{
Aws::Endpoint::AWSEndpoint endpoint;
const auto crtUrl = resolved->GetUrl();
Aws::String sdkCrtUrl = Aws::String(crtUrl->begin(), crtUrl->end());
AWS_LOGSTREAM_DEBUG(DEFAULT_ENDPOINT_PROVIDER_TAG, "Endpoint rules engine evaluated the endpoint: " << sdkCrtUrl);
endpoint.SetURL(PercentDecode(std::move(sdkCrtUrl)));
// Transform attributes
// Each attribute consist of properties, hence converting CRT properties to SDK attributes
const auto crtProps = resolved->GetProperties();
if (crtProps && crtProps->size() > 2) {
Aws::String sdkCrtProps = crtProps ? Aws::String(crtProps->begin(), crtProps->end()) : "";
AWS_LOGSTREAM_TRACE(DEFAULT_ENDPOINT_PROVIDER_TAG, "Endpoint rules evaluated props: " << sdkCrtProps);
Internal::Endpoint::EndpointAttributes epAttributes = Internal::Endpoint::EndpointAttributes::BuildEndpointAttributesFromJson(
sdkCrtProps);
endpoint.SetAttributes(std::move(epAttributes));
}
// transform headers
const auto crtHeaders = resolved->GetHeaders();
if (crtHeaders)
{
Aws::UnorderedMap<Aws::String, Aws::String> sdkHeaders;
for (const auto& header: *crtHeaders)
{
Aws::String key(header.first.begin(), header.first.end());
Aws::String value;
for (const auto& crtHeaderValue : header.second)
{
if(!value.empty()) {
value.insert(value.end(), ';');
}
value.insert(value.end(), crtHeaderValue.begin(), crtHeaderValue.end());
}
sdkHeaders.emplace(std::move(key), std::move(value));
}
endpoint.SetHeaders(std::move(sdkHeaders));
}
return ResolveEndpointOutcome(std::move(endpoint));
}
else
{
return ResolveEndpointOutcome(
Aws::Client::AWSError<Aws::Client::CoreErrors>(
Aws::Client::CoreErrors::INVALID_QUERY_PARAMETER,
"",
"Invalid AWS CRT RuleEngine state",
false/*retryable*/));
}
}
auto errCode = Aws::Crt::LastError();
AWS_LOGSTREAM_DEBUG(DEFAULT_ENDPOINT_PROVIDER_TAG, "ERROR: Rule engine has failed to evaluate the endpoint: " << errCode << " " << Aws::Crt::ErrorDebugString(errCode));
return ResolveEndpointOutcome(
Aws::Client::AWSError<Aws::Client::CoreErrors>(
Aws::Client::CoreErrors::INVALID_QUERY_PARAMETER,
"",
"Failed to evaluate the endpoint: null output from AWS CRT RuleEngine",
false/*retryable*/));
}
} // namespace Endpoint
} // namespace Aws
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