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Mikhail Karnevskiy
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#include "asapo/request/broker_request.h"
#include "asapo/request/consumer_error.h"
#include "asapo/http_client/http_error.h"
#include "asapo/http_client/http_client.h"
#include "asapo/common/internal/version.h"
#include "asapo/json_parser/json_parser.h"
#include <chrono>
#include "asapo/io/io_factory.h"
#include <memory>
namespace asapo
{
Error GetNoDataResponseFromJson(const std::string &json_string, ConsumerErrorData *data)
{
JsonStringParser parser(json_string);
Error err;
if ((err = parser.GetUInt64("id", &data->id)) || (err = parser.GetUInt64("id_max", &data->id_max)) || (err = parser.GetString("next_stream", &data->next_stream)))
{
return err;
}
return nullptr;
}
Error GetPartialDataResponseFromJson(const std::string &json_string, PartialErrorData *data)
{
Error err;
auto parser = JsonStringParser(json_string);
uint64_t id, size;
if ((err = parser.GetUInt64("size", &size)) ||
(err = parser.GetUInt64("_id", &id)))
{
return err;
}
data->id = id;
data->expected_size = size;
return nullptr;
}
Error ConsumerErrorFromPartialDataResponse(const std::string &response)
{
PartialErrorData data;
auto parse_error = GetPartialDataResponseFromJson(response, &data);
if (parse_error)
{
auto err = ConsumerErrorTemplates::kInterruptedTransaction.Generate("malformed response");
err->AddDetails("response", response);
return err;
}
auto err = ConsumerErrorTemplates::kPartialData.Generate();
PartialErrorData *error_data = new PartialErrorData{data};
err->SetCustomData(std::unique_ptr<CustomErrorData>{error_data});
return err;
}
Error ConsumerErrorFromNoDataResponse(const std::string &response)
{
if (response.find("get_record_by_id") != std::string::npos)
{
ConsumerErrorData data;
auto parse_error = GetNoDataResponseFromJson(response, &data);
if (parse_error)
{
return ConsumerErrorTemplates::kInterruptedTransaction.Generate("malformed response - " + response);
}
Error err;
if (data.id >= data.id_max)
{
err = data.next_stream.empty() ? ConsumerErrorTemplates::kEndOfStream.Generate() : ConsumerErrorTemplates::kStreamFinished.Generate();
}
else
{
err = ConsumerErrorTemplates::kNoData.Generate();
}
ConsumerErrorData *error_data = new ConsumerErrorData{data};
err->SetCustomData(std::unique_ptr<CustomErrorData>{error_data});
return err;
}
return ConsumerErrorTemplates::kNoData.Generate();
}
Error ConsumerErrorFromHttpCode(const RequestOutput *response, const HttpCode &code)
{
switch (code)
{
case HttpCode::OK:
return nullptr;
case HttpCode::NoContent:
return nullptr;
case HttpCode::PartialContent:
return ConsumerErrorFromPartialDataResponse(response->to_string());
case HttpCode::BadRequest:
return ConsumerErrorTemplates::kWrongInput.Generate(response->to_string());
case HttpCode::Unauthorized:
return ConsumerErrorTemplates::kWrongInput.Generate(response->to_string());
case HttpCode::InternalServerError:
return ConsumerErrorTemplates::kInterruptedTransaction.Generate(response->to_string());
case HttpCode::ServiceUnavailable:
return ConsumerErrorTemplates::kUnavailableService.Generate(response->to_string());
case HttpCode::NotFound:
return ConsumerErrorTemplates::kUnavailableService.Generate(response->to_string());
case HttpCode::Conflict:
return ConsumerErrorFromNoDataResponse(response->to_string());
case HttpCode::UnsupportedMediaType:
return ConsumerErrorTemplates::kUnsupportedClient.Generate(response->to_string());
default:
return ConsumerErrorTemplates::kInterruptedTransaction.Generate(response->to_string());
}
}
Error ConsumerErrorFromServerError(const Error &server_err)
{
if (server_err == HttpErrorTemplates::kTransferError)
{
return ConsumerErrorTemplates::kInterruptedTransaction.Generate();
}
else
{
return ConsumerErrorTemplates::kUnavailableService.Generate();
}
}
Error ProcessRequestResponce(const RequestInfo &request,
Error server_err,
const RequestOutput *response,
const HttpCode &code)
{
Error err;
if (server_err != nullptr)
{
err = ConsumerErrorFromServerError(server_err);
err->SetCause(std::move(server_err));
}
else
{
err = ConsumerErrorFromHttpCode(response, code);
}
if (err != nullptr)
{
err->AddDetails("host", request.host)->AddDetails("api", request.api);
}
return err;
}
ServiceRequest::ServiceRequest(std::string server_uri,
SourceCredentials source) : httpclient__{DefaultHttpClient()},
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endpoint_{std::move(server_uri)},
source_credentials_(std::move(source))
{
data_source_encoded_ = httpclient__->UrlEscape(source_credentials_.data_source);
}
std::string ServiceRequest::RequestWithToken(std::string uri)
{
return std::move(uri) + "?token=" + source_credentials_.user_token;
}
Error ServiceRequest::ProcessPostRequest(const RequestInfo &request, RequestOutput *response, HttpCode *code)
{
Error err;
switch (request.output_mode)
{
case OutputDataMode::string:
response->string_output =
httpclient__->Post(RequestWithToken(request.host + request.api) + request.extra_params,
request.cookie,
request.body,
code,
&err);
break;
case OutputDataMode::array:
err =
httpclient__->Post(RequestWithToken(request.host + request.api) + request.extra_params, request.cookie,
request.body, &response->data_output, response->data_output_size, code);
break;
default:
break;
}
return err;
}
Error ServiceRequest::ProcessGetRequest(const RequestInfo &request, RequestOutput *response, HttpCode *code)
{
Error err;
response->string_output =
httpclient__->Get(RequestWithToken(request.host + request.api) + request.extra_params, code, &err);
return err;
}
Error ServiceRequest::ProcessRequest(RequestOutput *response, const RequestInfo &request, std::string *service_uri)
{
Error err;
HttpCode code;
if (request.post)
{
err = ProcessPostRequest(request, response, &code);
}
else
{
err = ProcessGetRequest(request, response, &code);
}
if (err && service_uri)
{
service_uri->clear();
}
return ProcessRequestResponce(request, std::move(err), response, code);
}
RequestInfo ServiceRequest::GetDiscoveryRequest(const std::string &service_name) const
{
RequestInfo ri;
ri.host = endpoint_;
ri.api = "/asapo-discovery/" + kConsumerProtocol.GetDiscoveryVersion() + "/" + service_name;
ri.extra_params = "&protocol=" + kConsumerProtocol.GetVersion();
return ri;
}
Error ServiceRequest::ProcessDiscoverServiceResult(Error err, std::string *uri_to_set)
{
if (err != nullptr || uri_to_set->empty())
{
uri_to_set->clear();
if (err == ConsumerErrorTemplates::kUnsupportedClient)
{
return err;
}
auto ret_err = ConsumerErrorTemplates::kUnavailableService.Generate(std::move(err));
ret_err->AddDetails("destination", endpoint_);
return ret_err;
}
return nullptr;
}
std::string ServiceRequest::BrokerRequestWithTimeout(RequestInfo request, Error *err, uint64_t timeout_ms,
std::atomic<bool> &interrupt_flag)
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{
RequestOutput response;
*err = ServiceRequestWithTimeout(ServiceName::kBroker, ¤t_broker_uri_, request, &response, timeout_ms, interrupt_flag);
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return std::move(response.string_output);
}
std::string ServiceRequest::BrokerRequestWithTimeout(RequestInfo request, Error *err, uint64_t timeout_ms)
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{
std::atomic<bool> interrupt_flag{false};
return BrokerRequestWithTimeout(request, err, timeout_ms, interrupt_flag);
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}
Error ServiceRequest::ServiceRequestWithoutTimeout(const std::string &service_name,
std::string *service_uri,
RequestInfo request,
RequestOutput *response)
{
auto err = DiscoverService(service_name, service_uri);
if (err == nullptr)
{
request.host = *service_uri;
return ProcessRequest(response, request, service_uri);
}
return err;
}
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Error ServiceRequest::ServiceRequestWithTimeout(const std::string &service_name,
std::string *service_uri,
RequestInfo request,
RequestOutput *response,
uint64_t timeout_ms,
std::atomic<bool> &interrupt_flag)
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{
uint64_t elapsed_ms = 0;
Error err;
while (elapsed_ms <= timeout_ms)
{
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{
err = ConsumerErrorTemplates::kInterruptedTransaction.Generate("interrupted by user request");
break;
}
auto start = std::chrono::steady_clock::now();
err = ServiceRequestWithoutTimeout(service_name, service_uri, request, response);
if (err == nullptr || err == ConsumerErrorTemplates::kWrongInput)
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{
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}
std::this_thread::sleep_for(std::chrono::milliseconds(100));
elapsed_ms += static_cast<uint64_t>(std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - start).count());
}
return err;
}
Error ServiceRequest::DiscoverService(const std::string &service_name, std::string *uri_to_set)
{
if (!uri_to_set->empty())
{
return nullptr;
}
auto ri = GetDiscoveryRequest(service_name);
RequestOutput output;
auto err = ProcessRequest(&output, ri, nullptr);
*uri_to_set = std::move(output.string_output);
return ProcessDiscoverServiceResult(std::move(err), uri_to_set);
}
RequestInfo ServiceRequest::CreateBrokerApiRequest(std::string stream, std::string group, std::string suffix) const
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{
auto stream_encoded = httpclient__->UrlEscape(std::move(stream));
auto group_encoded = group.size() > 0 ? httpclient__->UrlEscape(std::move(group)) : "";
auto uri = "/" + kConsumerProtocol.GetBrokerVersion() + "/beamtime/" + source_credentials_.beamtime_id + "/" + data_source_encoded_ + "/" + stream_encoded;
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if (group_encoded.size() > 0)
{
uri = uri + "/" + group_encoded;
}
if (suffix.size() > 0)
{
uri = uri + "/" + suffix;
}
RequestInfo ri;
ri.api = uri;
ri.extra_params += "&instanceid=" + httpclient__->UrlEscape(source_credentials_.instance_id);
ri.extra_params += "&pipelinestep=" + httpclient__->UrlEscape(source_credentials_.pipeline_step);
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return ri;
}
}