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#include "codes.h"
#include "fetch_single.h"
#include "parse.h"
#include <library/cpp/string_utils/base64/base64.h>
#include <util/string/ascii.h>
#include <util/string/cast.h>
#include <library/cpp/string_utils/url/url.h>
namespace NHttpFetcher {
static sockaddr_in6 IPv6Loopback() {
sockaddr_in6 sock = {};
sock.sin6_family = AF_INET6;
sock.sin6_addr = IN6ADDR_LOOPBACK_INIT;
return sock;
}
class THeaders {
public:
inline void Build(const TRequestRef& request) {
if (!!request->Password || !!request->Login) {
TString pass;
TString login;
TString raw;
TString encoded;
if (!!request->Password) {
pass = *request->Password;
}
if (!!request->Login) {
login = *request->Login;
}
raw = TString::Join(login, ":", pass);
Base64Encode(raw, encoded);
BasicAuth_ = TString::Join("Authorization: Basic ", encoded, "\r\n");
Headers_.push_back(BasicAuth_.c_str());
}
if (request->ExtraHeaders) {
Headers_.reserve(Headers_.size() + request->ExtraHeaders.size());
for (const TString& header : request->ExtraHeaders) {
if (AsciiHasSuffixIgnoreCase(header, "\r\n")) {
Headers_.push_back(header.c_str());
} else {
Fixed_.push_back(header + "\r\n");
Headers_.push_back(Fixed_.back().c_str());
}
}
}
if (!!request->OAuthToken) {
OAuth_ = TString::Join("Authorization: OAuth ", *request->OAuthToken, "\r\n");
Headers_.push_back(OAuth_.c_str());
}
if (!!request->AcceptEncoding) {
AcceptEncoding_ = TString::Join("Accept-Encoding: ", *request->AcceptEncoding, "\r\n");
Headers_.push_back(AcceptEncoding_.c_str());
}
ContentType_ = "application/x-www-form-urlencoded";
if (!!request->PostData) {
if (!!request->ContentType) {
ContentType_ = *request->ContentType;
}
ContentLength_ = TString::Join("Content-Length: ", ToString(request->PostData->size()), "\r\n");
ContentType_ = TString::Join("Content-Type: ", ContentType_, "\r\n");
Headers_.push_back(ContentLength_.c_str());
Headers_.push_back(ContentType_.c_str());
}
Headers_.push_back((const char*)nullptr);
}
inline const char* const* Data() {
return Headers_.data();
}
private:
TVector<const char*> Headers_;
TVector<TString> Fixed_;
TString BasicAuth_;
TString OAuth_;
TString AcceptEncoding_;
TString ContentLength_;
TString ContentType_;
};
TResultRef FetchSingleImpl(TRequestRef request, TSocketPool* pool) {
Y_ASSERT(!!request->Url && "no url passed in fetch request");
TResultRef result(new TResult(request->Url));
try {
TSimpleFetcherFetcher fetcher;
THttpHeader header;
THttpURL::EKind kind = THttpURL::SchemeHTTP;
ui16 port = 80;
TString host;
ParseUrl(request->Url, kind, host, port);
TString path = ToString(GetPathAndQuery(request->Url));
bool defaultPort = (kind == THttpURL::SchemeHTTP && port == 80) ||
(kind == THttpURL::SchemeHTTPS && port == 443);
if (request->UnixSocketPath && !request->UnixSocketPath->empty()) {
TAddrList addrs;
addrs.emplace_back(new NAddr::TUnixSocketAddr{*request->UnixSocketPath});
fetcher.SetHost(host.data(), port, addrs, kind);
} else if (host == "127.0.0.1") {
// todo: correctly handle /etc/hosts records && ip-addresses
// bypass normal DNS resolving for localhost
TAddrList addrs({new NAddr::TIPv4Addr(TIpAddress(0x0100007F, port))});
fetcher.SetHost(host.data(), port, addrs, kind);
} else if (host == "localhost") {
sockaddr_in6 ipv6Addr = IPv6Loopback();
ipv6Addr.sin6_port = HostToInet(port);
TAddrList addrs({new NAddr::TIPv6Addr(ipv6Addr), new NAddr::TIPv4Addr(TIpAddress(0x0100007F, port))});
fetcher.SetHost(host.data(), port, addrs, kind);
} else {
Y_ASSERT(!!host && "no host detected in url passed");
fetcher.SetHost(host.data(), port, kind);
}
header.Init();
THeaders headers;
headers.Build(request);
TString hostHeader = (!!request->CustomHost ? *request->CustomHost : host) +
(defaultPort ? "" : ":" + ToString(port));
fetcher.SetHostHeader(hostHeader.data());
if (!!request->UserAgent) {
fetcher.SetIdentification((*request->UserAgent).data(), nullptr);
} else {
fetcher.SetIdentification("Mozilla/5.0 (compatible; YandexNews/3.0; +http://yandex.com/bots)", nullptr);
}
if (!!request->Method) {
fetcher.SetMethod(request->Method->data(), request->Method->size());
}
if (!!request->PostData) {
fetcher.SetPostData(request->PostData->data(), request->PostData->size());
}
fetcher.SetMaxBodySize(request->MaxBodySize);
fetcher.SetMaxHeaderSize(request->MaxHeaderSize);
if (request->ConnectTimeout) {
fetcher.SetConnectTimeout(*request->ConnectTimeout);
}
{
const TDuration rest = request->Deadline - Now();
fetcher.SetTimeout(request->RdWrTimeout != TDuration::Zero()
? ::Min(request->RdWrTimeout, rest)
: rest);
}
fetcher.SetNeedDataCallback(request->NeedDataCallback);
bool persistent = !request->OnlyHeaders;
void* handle = nullptr;
if (pool) {
while (auto socket = pool->GetSocket(host, port)) {
if (socket->Good()) {
handle = socket.Get();
fetcher.SetSocket(socket.Release());
fetcher.SetPersistent(true);
break;
}
}
}
int fetchResult = fetcher.Fetch(&header, path.data(), headers.Data(), persistent, request->OnlyHeaders);
if (!fetcher.Data.empty()) {
TStringInput httpIn(fetcher.Data.Str());
ParseHttpResponse(*result, httpIn, kind, host, port);
}
if (fetchResult < 0 || header.error != 0) {
result->Code = header.error;
}
if (pool && persistent && !header.error && !header.connection_closed) {
THolder<TSocketPool::TSocketHandle> socket(fetcher.PickOutSocket());
if (!!socket && socket->Good()) {
if (handle == socket.Get()) {
result->ConnectionReused = true;
}
pool->ReturnSocket(host, port, std::move(socket));
}
}
} catch (...) {
result->Code = UNKNOWN_ERROR;
}
return result;
}
}
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