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#include "abortable_http_response.h"
#include <util/system/mutex.h>
#include <util/generic/singleton.h>
#include <util/generic/hash_set.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
class TAbortableHttpResponseRegistry {
public:
TOutageId StartOutage(TString urlPattern, const TOutageOptions& options)
{
auto g = Guard(Lock_);
auto id = NextId_++;
IdToOutage_.emplace(id, TOutageEntry{std::move(urlPattern), options.ResponseCount_, options.LengthLimit_});
return id;
}
void StopOutage(TOutageId id)
{
auto g = Guard(Lock_);
IdToOutage_.erase(id);
}
void Add(IAbortableHttpResponse* response)
{
auto g = Guard(Lock_);
for (auto& [id, entry] : IdToOutage_) {
if (entry.Counter > 0 && response->GetUrl().find(entry.Pattern) != TString::npos) {
response->SetLengthLimit(entry.LengthLimit);
entry.Counter -= 1;
}
}
ResponseList_.PushBack(response);
}
void Remove(IAbortableHttpResponse* response)
{
auto g = Guard(Lock_);
response->Unlink();
}
static TAbortableHttpResponseRegistry& Get()
{
return *Singleton<TAbortableHttpResponseRegistry>();
}
int AbortAll(const TString& urlPattern)
{
int result = 0;
for (auto& response : ResponseList_) {
if (!response.IsAborted() && response.GetUrl().find(urlPattern) != TString::npos) {
response.Abort();
++result;
}
}
return result;
}
private:
struct TOutageEntry
{
TString Pattern;
size_t Counter;
size_t LengthLimit;
};
private:
TOutageId NextId_ = 0;
TIntrusiveList<IAbortableHttpResponse> ResponseList_;
THashMap<TOutageId, TOutageEntry> IdToOutage_;
TMutex Lock_;
};
////////////////////////////////////////////////////////////////////////////////
TAbortableHttpResponse::TOutage::TOutage(
TString urlPattern,
TAbortableHttpResponseRegistry& registry,
const TOutageOptions& options)
: UrlPattern_(std::move(urlPattern))
, Registry_(registry)
, Id_(registry.StartOutage(UrlPattern_, options))
{ }
TAbortableHttpResponse::TOutage::~TOutage()
{
Stop();
}
void TAbortableHttpResponse::TOutage::Stop()
{
if (!Stopped_) {
Registry_.StopOutage(Id_);
Stopped_ = true;
}
}
////////////////////////////////////////////////////////////////////////////////
TAbortableHttpResponseBase::TAbortableHttpResponseBase(const TString& url)
: Url_(url)
{
TAbortableHttpResponseRegistry::Get().Add(this);
}
TAbortableHttpResponseBase::~TAbortableHttpResponseBase()
{
TAbortableHttpResponseRegistry::Get().Remove(this);
}
void TAbortableHttpResponseBase::Abort()
{
Aborted_ = true;
}
void TAbortableHttpResponseBase::SetLengthLimit(size_t limit)
{
LengthLimit_ = limit;
if (LengthLimit_ == 0) {
Abort();
}
}
const TString& TAbortableHttpResponseBase::GetUrl() const
{
return Url_;
}
bool TAbortableHttpResponseBase::IsAborted() const
{
return Aborted_;
}
////////////////////////////////////////////////////////////////////////////////
TAbortableHttpResponse::TAbortableHttpResponse(
TRequestContext context,
IInputStream* socketStream,
const TString& url)
: THttpResponse(std::move(context), socketStream)
, TAbortableHttpResponseBase(url)
{
}
size_t TAbortableHttpResponse::DoRead(void* buf, size_t len)
{
if (Aborted_) {
ythrow TAbortedForTestPurpose() << "response was aborted";
}
len = std::min(len, LengthLimit_);
auto read = THttpResponse::DoRead(buf, len);
LengthLimit_ -= read;
if (LengthLimit_ == 0) {
Abort();
}
return read;
}
size_t TAbortableHttpResponse::DoSkip(size_t len)
{
if (Aborted_) {
ythrow TAbortedForTestPurpose() << "response was aborted";
}
return THttpResponse::DoSkip(len);
}
int TAbortableHttpResponse::AbortAll(const TString& urlPattern)
{
return TAbortableHttpResponseRegistry::Get().AbortAll(urlPattern);
}
TAbortableHttpResponse::TOutage TAbortableHttpResponse::StartOutage(
const TString& urlPattern,
const TOutageOptions& options)
{
return TOutage(urlPattern, TAbortableHttpResponseRegistry::Get(), options);
}
TAbortableHttpResponse::TOutage TAbortableHttpResponse::StartOutage(
const TString& urlPattern,
size_t responseCount)
{
return StartOutage(urlPattern, TOutageOptions().ResponseCount(responseCount));
}
TAbortableCoreHttpResponse::TAbortableCoreHttpResponse(
std::unique_ptr<IInputStream> stream,
const TString& url)
: TAbortableHttpResponseBase(url)
, Stream_(std::move(stream))
{
}
size_t TAbortableCoreHttpResponse::DoRead(void* buf, size_t len)
{
if (Aborted_) {
ythrow TAbortedForTestPurpose() << "response was aborted";
}
len = std::min(len, LengthLimit_);
auto read = Stream_->Read(buf, len);
LengthLimit_ -= read;
if (LengthLimit_ == 0) {
Abort();
}
return read;
}
size_t TAbortableCoreHttpResponse::DoSkip(size_t len)
{
if (Aborted_) {
ythrow TAbortedForTestPurpose() << "response was aborted";
}
return Stream_->Skip(len);
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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