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nghttp2/src/shrpx_downstream.cc

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "shrpx_downstream.h"
#include <cassert>
#include "url-parser/url_parser.h"
#include "shrpx_upstream.h"
#include "shrpx_client_handler.h"
#include "shrpx_config.h"
#include "shrpx_error.h"
#include "shrpx_downstream_connection.h"
#include "shrpx_downstream_queue.h"
#include "shrpx_worker.h"
#include "shrpx_http2_session.h"
#include "shrpx_log.h"
#ifdef HAVE_MRUBY
# include "shrpx_mruby.h"
#endif // HAVE_MRUBY
#include "util.h"
#include "http2.h"
namespace shrpx {
namespace {
void upstream_timeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
auto downstream = static_cast<Downstream *>(w->data);
auto upstream = downstream->get_upstream();
auto which = revents == EV_READ ? "read" : "write";
if (LOG_ENABLED(INFO)) {
DLOG(INFO, downstream) << "upstream timeout stream_id="
<< downstream->get_stream_id() << " event=" << which;
}
downstream->disable_upstream_rtimer();
downstream->disable_upstream_wtimer();
upstream->on_timeout(downstream);
}
} // namespace
namespace {
void upstream_rtimeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
upstream_timeoutcb(loop, w, EV_READ);
}
} // namespace
namespace {
void upstream_wtimeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
upstream_timeoutcb(loop, w, EV_WRITE);
}
} // namespace
namespace {
void downstream_timeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
auto downstream = static_cast<Downstream *>(w->data);
auto which = revents == EV_READ ? "read" : "write";
if (LOG_ENABLED(INFO)) {
DLOG(INFO, downstream) << "downstream timeout stream_id="
<< downstream->get_downstream_stream_id()
<< " event=" << which;
}
downstream->disable_downstream_rtimer();
downstream->disable_downstream_wtimer();
auto dconn = downstream->get_downstream_connection();
if (dconn) {
dconn->on_timeout();
}
}
} // namespace
namespace {
void downstream_rtimeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
downstream_timeoutcb(loop, w, EV_READ);
}
} // namespace
namespace {
void downstream_wtimeoutcb(struct ev_loop *loop, ev_timer *w, int revents) {
downstream_timeoutcb(loop, w, EV_WRITE);
}
} // namespace
// upstream could be nullptr for unittests
Downstream::Downstream(Upstream *upstream, MemchunkPool *mcpool,
int32_t stream_id)
: dlnext(nullptr),
dlprev(nullptr),
response_sent_body_length(0),
balloc_(1024, 1024),
req_(balloc_),
resp_(balloc_),
request_start_time_(std::chrono::high_resolution_clock::now()),
blocked_request_buf_(mcpool),
request_buf_(mcpool),
response_buf_(mcpool),
upstream_(upstream),
blocked_link_(nullptr),
addr_(nullptr),
num_retry_(0),
stream_id_(stream_id),
assoc_stream_id_(-1),
downstream_stream_id_(-1),
response_rst_stream_error_code_(NGHTTP2_NO_ERROR),
affinity_cookie_(0),
request_state_(DownstreamState::INITIAL),
response_state_(DownstreamState::INITIAL),
dispatch_state_(DispatchState::NONE),
upgraded_(false),
chunked_request_(false),
chunked_response_(false),
expect_final_response_(false),
request_pending_(false),
request_header_sent_(false),
accesslog_written_(false),
new_affinity_cookie_(false),
blocked_request_data_eof_(false) {
auto &timeoutconf = get_config()->http2.timeout;
ev_timer_init(&upstream_rtimer_, &upstream_rtimeoutcb, 0.,
timeoutconf.stream_read);
ev_timer_init(&upstream_wtimer_, &upstream_wtimeoutcb, 0.,
timeoutconf.stream_write);
ev_timer_init(&downstream_rtimer_, &downstream_rtimeoutcb, 0.,
timeoutconf.stream_read);
ev_timer_init(&downstream_wtimer_, &downstream_wtimeoutcb, 0.,
timeoutconf.stream_write);
upstream_rtimer_.data = this;
upstream_wtimer_.data = this;
downstream_rtimer_.data = this;
downstream_wtimer_.data = this;
rcbufs_.reserve(32);
}
Downstream::~Downstream() {
if (LOG_ENABLED(INFO)) {
DLOG(INFO, this) << "Deleting";
}
// check nullptr for unittest
if (upstream_) {
auto loop = upstream_->get_client_handler()->get_loop();
ev_timer_stop(loop, &upstream_rtimer_);
ev_timer_stop(loop, &upstream_wtimer_);
ev_timer_stop(loop, &downstream_rtimer_);
ev_timer_stop(loop, &downstream_wtimer_);
#ifdef HAVE_MRUBY
auto handler = upstream_->get_client_handler();
auto worker = handler->get_worker();
auto mruby_ctx = worker->get_mruby_context();
mruby_ctx->delete_downstream(this);
#endif // HAVE_MRUBY
}
#ifdef HAVE_MRUBY
if (dconn_) {
const auto &group = dconn_->get_downstream_addr_group();
if (group) {
const auto &mruby_ctx = group->mruby_ctx;
mruby_ctx->delete_downstream(this);
}
}
#endif // HAVE_MRUBY
// DownstreamConnection may refer to this object. Delete it now
// explicitly.
dconn_.reset();
for (auto rcbuf : rcbufs_) {
nghttp2_rcbuf_decref(rcbuf);
}
if (LOG_ENABLED(INFO)) {
DLOG(INFO, this) << "Deleted";
}
}
int Downstream::attach_downstream_connection(
std::unique_ptr<DownstreamConnection> dconn) {
if (dconn->attach_downstream(this) != 0) {
return -1;
}
dconn_ = std::move(dconn);
return 0;
}
void Downstream::detach_downstream_connection() {
if (!dconn_) {
return;
}
#ifdef HAVE_MRUBY
const auto &group = dconn_->get_downstream_addr_group();
if (group) {
const auto &mruby_ctx = group->mruby_ctx;
mruby_ctx->delete_downstream(this);
}
#endif // HAVE_MRUBY
dconn_->detach_downstream(this);
auto handler = dconn_->get_client_handler();
handler->pool_downstream_connection(
std::unique_ptr<DownstreamConnection>(dconn_.release()));
}
DownstreamConnection *Downstream::get_downstream_connection() {
return dconn_.get();
}
std::unique_ptr<DownstreamConnection> Downstream::pop_downstream_connection() {
#ifdef HAVE_MRUBY
if (!dconn_) {
return nullptr;
}
const auto &group = dconn_->get_downstream_addr_group();
if (group) {
const auto &mruby_ctx = group->mruby_ctx;
mruby_ctx->delete_downstream(this);
}
#endif // HAVE_MRUBY
return std::unique_ptr<DownstreamConnection>(dconn_.release());
}
void Downstream::pause_read(IOCtrlReason reason) {
if (dconn_) {
dconn_->pause_read(reason);
}
}
int Downstream::resume_read(IOCtrlReason reason, size_t consumed) {
if (dconn_) {
return dconn_->resume_read(reason, consumed);
}
return 0;
}
void Downstream::force_resume_read() {
if (dconn_) {
dconn_->force_resume_read();
}
}
namespace {
const HeaderRefs::value_type *
search_header_linear_backwards(const HeaderRefs &headers,
const StringRef &name) {
for (auto it = headers.rbegin(); it != headers.rend(); ++it) {
auto &kv = *it;
if (kv.name == name) {
return &kv;
}
}
return nullptr;
}
} // namespace
StringRef Downstream::assemble_request_cookie() {
size_t len = 0;
for (auto &kv : req_.fs.headers()) {
if (kv.token != http2::HD_COOKIE || kv.value.empty()) {
continue;
}
len += kv.value.size() + str_size("; ");
}
auto iov = make_byte_ref(balloc_, len + 1);
auto p = iov.base;
for (auto &kv : req_.fs.headers()) {
if (kv.token != http2::HD_COOKIE || kv.value.empty()) {
continue;
}
auto end = std::end(kv.value);
for (auto it = std::begin(kv.value) + kv.value.size();
it != std::begin(kv.value); --it) {
auto c = *(it - 1);
if (c == ' ' || c == ';') {
continue;
}
end = it;
break;
}
p = std::copy(std::begin(kv.value), end, p);
p = util::copy_lit(p, "; ");
}
// cut trailing "; "
if (p - iov.base >= 2) {
p -= 2;
}
return StringRef{iov.base, p};
}
uint32_t Downstream::find_affinity_cookie(const StringRef &name) {
for (auto &kv : req_.fs.headers()) {
if (kv.token != http2::HD_COOKIE) {
continue;
}
for (auto it = std::begin(kv.value); it != std::end(kv.value);) {
if (*it == '\t' || *it == ' ' || *it == ';') {
++it;
continue;
}
auto end = std::find(it, std::end(kv.value), '=');
if (end == std::end(kv.value)) {
return 0;
}
if (!util::streq(name, StringRef{it, end})) {
it = std::find(it, std::end(kv.value), ';');
continue;
}
it = std::find(end + 1, std::end(kv.value), ';');
auto val = StringRef{end + 1, it};
if (val.size() != 8) {
return 0;
}
uint32_t h = 0;
for (auto c : val) {
auto n = util::hex_to_uint(c);
if (n == 256) {
return 0;
}
h <<= 4;
h += n;
}
affinity_cookie_ = h;
return h;
}
}
return 0;
}
size_t Downstream::count_crumble_request_cookie() {
size_t n = 0;
for (auto &kv : req_.fs.headers()) {
if (kv.token != http2::HD_COOKIE) {
continue;
}
for (auto it = std::begin(kv.value); it != std::end(kv.value);) {
if (*it == '\t' || *it == ' ' || *it == ';') {
++it;
continue;
}
it = std::find(it, std::end(kv.value), ';');
++n;
}
}
return n;
}
void Downstream::crumble_request_cookie(std::vector<nghttp2_nv> &nva) {
for (auto &kv : req_.fs.headers()) {
if (kv.token != http2::HD_COOKIE) {
continue;
}
for (auto it = std::begin(kv.value); it != std::end(kv.value);) {
if (*it == '\t' || *it == ' ' || *it == ';') {
++it;
continue;
}
auto first = it;
it = std::find(it, std::end(kv.value), ';');
nva.push_back({(uint8_t *)"cookie", (uint8_t *)first, str_size("cookie"),
(size_t)(it - first),
(uint8_t)(NGHTTP2_NV_FLAG_NO_COPY_NAME |
NGHTTP2_NV_FLAG_NO_COPY_VALUE |
(kv.no_index ? NGHTTP2_NV_FLAG_NO_INDEX : 0))});
}
}
}
namespace {
void add_header(size_t &sum, HeaderRefs &headers, const StringRef &name,
const StringRef &value, bool no_index, int32_t token) {
sum += name.size() + value.size();
headers.emplace_back(name, value, no_index, token);
}
} // namespace
namespace {
StringRef alloc_header_name(BlockAllocator &balloc, const StringRef &name) {
auto iov = make_byte_ref(balloc, name.size() + 1);
auto p = iov.base;
p = std::copy(std::begin(name), std::end(name), p);
util::inp_strlower(iov.base, p);
*p = '\0';
return StringRef{iov.base, p};
}
} // namespace
namespace {
void append_last_header_key(BlockAllocator &balloc, bool &key_prev, size_t &sum,
HeaderRefs &headers, const char *data, size_t len) {
assert(key_prev);
sum += len;
auto &item = headers.back();
auto name =
realloc_concat_string_ref(balloc, item.name, StringRef{data, len});
auto p = const_cast<uint8_t *>(name.byte());
util::inp_strlower(p + name.size() - len, p + name.size());
item.name = name;
item.token = http2::lookup_token(item.name);
}
} // namespace
namespace {
void append_last_header_value(BlockAllocator &balloc, bool &key_prev,
size_t &sum, HeaderRefs &headers,
const char *data, size_t len) {
key_prev = false;
sum += len;
auto &item = headers.back();
item.value =
realloc_concat_string_ref(balloc, item.value, StringRef{data, len});
}
} // namespace
int FieldStore::parse_content_length() {
content_length = -1;
for (auto &kv : headers_) {
if (kv.token != http2::HD_CONTENT_LENGTH) {
continue;
}
auto len = util::parse_uint(kv.value);
if (len == -1) {
return -1;
}
if (content_length != -1) {
return -1;
}
content_length = len;
}
return 0;
}
const HeaderRefs::value_type *FieldStore::header(int32_t token) const {
for (auto it = headers_.rbegin(); it != headers_.rend(); ++it) {
auto &kv = *it;
if (kv.token == token) {
return &kv;
}
}
return nullptr;
}
HeaderRefs::value_type *FieldStore::header(int32_t token) {
for (auto it = headers_.rbegin(); it != headers_.rend(); ++it) {
auto &kv = *it;
if (kv.token == token) {
return &kv;
}
}
return nullptr;
}
const HeaderRefs::value_type *FieldStore::header(const StringRef &name) const {
return search_header_linear_backwards(headers_, name);
}
void FieldStore::add_header_token(const StringRef &name, const StringRef &value,
bool no_index, int32_t token) {
shrpx::add_header(buffer_size_, headers_, name, value, no_index, token);
}
void FieldStore::alloc_add_header_name(const StringRef &name) {
auto name_ref = alloc_header_name(balloc_, name);
auto token = http2::lookup_token(name_ref);
add_header_token(name_ref, StringRef{}, false, token);
header_key_prev_ = true;
}
void FieldStore::append_last_header_key(const char *data, size_t len) {
shrpx::append_last_header_key(balloc_, header_key_prev_, buffer_size_,
headers_, data, len);
}
void FieldStore::append_last_header_value(const char *data, size_t len) {
shrpx::append_last_header_value(balloc_, header_key_prev_, buffer_size_,
headers_, data, len);
}
void FieldStore::clear_headers() {
headers_.clear();
header_key_prev_ = false;
}
void FieldStore::add_trailer_token(const StringRef &name,
const StringRef &value, bool no_index,
int32_t token) {
// Header size limit should be applied to all header and trailer
// fields combined.
shrpx::add_header(buffer_size_, trailers_, name, value, no_index, token);
}
void FieldStore::alloc_add_trailer_name(const StringRef &name) {
auto name_ref = alloc_header_name(balloc_, name);
auto token = http2::lookup_token(name_ref);
add_trailer_token(name_ref, StringRef{}, false, token);
trailer_key_prev_ = true;
}
void FieldStore::append_last_trailer_key(const char *data, size_t len) {
shrpx::append_last_header_key(balloc_, trailer_key_prev_, buffer_size_,
trailers_, data, len);
}
void FieldStore::append_last_trailer_value(const char *data, size_t len) {
shrpx::append_last_header_value(balloc_, trailer_key_prev_, buffer_size_,
trailers_, data, len);
}
void FieldStore::erase_content_length_and_transfer_encoding() {
for (auto &kv : headers_) {
switch (kv.token) {
case http2::HD_CONTENT_LENGTH:
case http2::HD_TRANSFER_ENCODING:
kv.name = StringRef{};
kv.token = -1;
break;
}
}
}
void Downstream::set_request_start_time(
std::chrono::high_resolution_clock::time_point time) {
request_start_time_ = std::move(time);
}
const std::chrono::high_resolution_clock::time_point &
Downstream::get_request_start_time() const {
return request_start_time_;
}
void Downstream::reset_upstream(Upstream *upstream) {
upstream_ = upstream;
if (dconn_) {
dconn_->on_upstream_change(upstream);
}
}
Upstream *Downstream::get_upstream() const { return upstream_; }
void Downstream::set_stream_id(int32_t stream_id) { stream_id_ = stream_id; }
int32_t Downstream::get_stream_id() const { return stream_id_; }
void Downstream::set_request_state(DownstreamState state) {
request_state_ = state;
}
DownstreamState Downstream::get_request_state() const { return request_state_; }
bool Downstream::get_chunked_request() const { return chunked_request_; }
void Downstream::set_chunked_request(bool f) { chunked_request_ = f; }
bool Downstream::request_buf_full() {
auto handler = upstream_->get_client_handler();
auto faddr = handler->get_upstream_addr();
auto worker = handler->get_worker();
// We don't check buffer size here for API endpoint.
if (faddr->alt_mode == UpstreamAltMode::API) {
return false;
}
if (dconn_) {
auto &downstreamconf = *worker->get_downstream_config();
return blocked_request_buf_.rleft() + request_buf_.rleft() >=
downstreamconf.request_buffer_size;
}
return false;
}
DefaultMemchunks *Downstream::get_request_buf() { return &request_buf_; }
// Call this function after this object is attached to
// Downstream. Otherwise, the program will crash.
int Downstream::push_request_headers() {
if (!dconn_) {
DLOG(INFO, this) << "dconn_ is NULL";
return -1;
}
return dconn_->push_request_headers();
}
int Downstream::push_upload_data_chunk(const uint8_t *data, size_t datalen) {
req_.recv_body_length += datalen;
if (!dconn_ && !request_header_sent_) {
blocked_request_buf_.append(data, datalen);
req_.unconsumed_body_length += datalen;
return 0;
}
// Assumes that request headers have already been pushed to output
// buffer using push_request_headers().
if (!dconn_) {
DLOG(INFO, this) << "dconn_ is NULL";
return -1;
}
if (dconn_->push_upload_data_chunk(data, datalen) != 0) {
return -1;
}
req_.unconsumed_body_length += datalen;
return 0;
}
int Downstream::end_upload_data() {
if (!dconn_ && !request_header_sent_) {
blocked_request_data_eof_ = true;
return 0;
}
if (!dconn_) {
DLOG(INFO, this) << "dconn_ is NULL";
return -1;
}
return dconn_->end_upload_data();
}
void Downstream::rewrite_location_response_header(
const StringRef &upstream_scheme) {
auto hd = resp_.fs.header(http2::HD_LOCATION);
if (!hd) {
return;
}
if (request_downstream_host_.empty() || req_.authority.empty()) {
return;
}
http_parser_url u{};
auto rv = http_parser_parse_url(hd->value.c_str(), hd->value.size(), 0, &u);
if (rv != 0) {
return;
}
auto new_uri = http2::rewrite_location_uri(balloc_, hd->value, u,
request_downstream_host_,
req_.authority, upstream_scheme);
if (new_uri.empty()) {
return;
}
hd->value = new_uri;
}
bool Downstream::get_chunked_response() const { return chunked_response_; }
void Downstream::set_chunked_response(bool f) { chunked_response_ = f; }
int Downstream::on_read() {
if (!dconn_) {
DLOG(INFO, this) << "dconn_ is NULL";
return -1;
}
return dconn_->on_read();
}
void Downstream::set_response_state(DownstreamState state) {
response_state_ = state;
}
DownstreamState Downstream::get_response_state() const {
return response_state_;
}
DefaultMemchunks *Downstream::get_response_buf() { return &response_buf_; }
bool Downstream::response_buf_full() {
if (dconn_) {
auto handler = upstream_->get_client_handler();
auto worker = handler->get_worker();
auto &downstreamconf = *worker->get_downstream_config();
return response_buf_.rleft() >= downstreamconf.response_buffer_size;
}
return false;
}
bool Downstream::validate_request_recv_body_length() const {
if (req_.fs.content_length == -1) {
return true;
}
if (req_.fs.content_length != req_.recv_body_length) {
if (LOG_ENABLED(INFO)) {
DLOG(INFO, this) << "request invalid bodylen: content-length="
<< req_.fs.content_length
<< ", received=" << req_.recv_body_length;
}
return false;
}
return true;
}
bool Downstream::validate_response_recv_body_length() const {
if (!expect_response_body() || resp_.fs.content_length == -1) {
return true;
}
if (resp_.fs.content_length != resp_.recv_body_length) {
if (LOG_ENABLED(INFO)) {
DLOG(INFO, this) << "response invalid bodylen: content-length="
<< resp_.fs.content_length
<< ", received=" << resp_.recv_body_length;
}
return false;
}
return true;
}
void Downstream::check_upgrade_fulfilled_http2() {
// This handles nonzero req_.connect_proto and h1 frontend requests
// WebSocket upgrade.
upgraded_ = (req_.method == HTTP_CONNECT ||
req_.connect_proto == ConnectProto::WEBSOCKET) &&
resp_.http_status / 100 == 2;
}
void Downstream::check_upgrade_fulfilled_http1() {
if (req_.method == HTTP_CONNECT) {
if (req_.connect_proto == ConnectProto::WEBSOCKET) {
if (resp_.http_status != 101) {
return;
}
// This is done for HTTP/2 frontend only.
auto accept = resp_.fs.header(http2::HD_SEC_WEBSOCKET_ACCEPT);
if (!accept) {
return;
}
std::array<uint8_t, base64::encode_length(20)> accept_buf;
auto expected =
http2::make_websocket_accept_token(accept_buf.data(), ws_key_);
upgraded_ = expected != "" && expected == accept->value;
} else {
upgraded_ = resp_.http_status / 100 == 2;
}
return;
}
if (resp_.http_status == 101) {
// TODO Do more strict checking for upgrade headers
upgraded_ = req_.upgrade_request;
return;
}
}
void Downstream::inspect_http2_request() {
if (req_.method == HTTP_CONNECT) {
req_.upgrade_request = true;
}
}
void Downstream::inspect_http1_request() {
if (req_.method == HTTP_CONNECT) {
req_.upgrade_request = true;
} else if (req_.http_minor > 0) {
auto upgrade = req_.fs.header(http2::HD_UPGRADE);
if (upgrade) {
const auto &val = upgrade->value;
// TODO Perform more strict checking for upgrade headers
if (util::streq_l(NGHTTP2_CLEARTEXT_PROTO_VERSION_ID, val.c_str(),
val.size())) {
req_.http2_upgrade_seen = true;
} else {
req_.upgrade_request = true;
// TODO Should we check Sec-WebSocket-Key, and
// Sec-WebSocket-Version as well?
if (util::strieq_l("websocket", val)) {
req_.connect_proto = ConnectProto::WEBSOCKET;
}
}
}
}
auto transfer_encoding = req_.fs.header(http2::HD_TRANSFER_ENCODING);
if (transfer_encoding) {
req_.fs.content_length = -1;
if (util::iends_with_l(transfer_encoding->value, "chunked")) {
chunked_request_ = true;
}
}
}
void Downstream::inspect_http1_response() {
auto transfer_encoding = resp_.fs.header(http2::HD_TRANSFER_ENCODING);
if (transfer_encoding) {
resp_.fs.content_length = -1;
if (util::iends_with_l(transfer_encoding->value, "chunked")) {
chunked_response_ = true;
}
}
}
void Downstream::reset_response() {
resp_.http_status = 0;
resp_.http_major = 1;
resp_.http_minor = 1;
}
bool Downstream::get_non_final_response() const {
return !upgraded_ && resp_.http_status / 100 == 1;
}
bool Downstream::supports_non_final_response() const {
return req_.http_major == 2 || (req_.http_major == 1 && req_.http_minor == 1);
}
bool Downstream::get_upgraded() const { return upgraded_; }
bool Downstream::get_http2_upgrade_request() const {
return req_.http2_upgrade_seen && req_.fs.header(http2::HD_HTTP2_SETTINGS) &&
response_state_ == DownstreamState::INITIAL;
}
StringRef Downstream::get_http2_settings() const {
auto http2_settings = req_.fs.header(http2::HD_HTTP2_SETTINGS);
if (!http2_settings) {
return StringRef{};
}
return http2_settings->value;
}
void Downstream::set_downstream_stream_id(int32_t stream_id) {
downstream_stream_id_ = stream_id;
}
int32_t Downstream::get_downstream_stream_id() const {
return downstream_stream_id_;
}
uint32_t Downstream::get_response_rst_stream_error_code() const {
return response_rst_stream_error_code_;
}
void Downstream::set_response_rst_stream_error_code(uint32_t error_code) {
response_rst_stream_error_code_ = error_code;
}
void Downstream::set_expect_final_response(bool f) {
expect_final_response_ = f;
}
bool Downstream::get_expect_final_response() const {
return expect_final_response_;
}
bool Downstream::expect_response_body() const {
return !resp_.headers_only &&
http2::expect_response_body(req_.method, resp_.http_status);
}
bool Downstream::expect_response_trailer() const {
// In HTTP/2, if final response HEADERS does not bear END_STREAM it
// is possible trailer fields might come, regardless of request
// method or status code.
return !resp_.headers_only && resp_.http_major == 2;
}
namespace {
void reset_timer(struct ev_loop *loop, ev_timer *w) { ev_timer_again(loop, w); }
} // namespace
namespace {
void try_reset_timer(struct ev_loop *loop, ev_timer *w) {
if (!ev_is_active(w)) {
return;
}
ev_timer_again(loop, w);
}
} // namespace
namespace {
void ensure_timer(struct ev_loop *loop, ev_timer *w) {
if (ev_is_active(w)) {
return;
}
ev_timer_again(loop, w);
}
} // namespace
namespace {
void disable_timer(struct ev_loop *loop, ev_timer *w) {
ev_timer_stop(loop, w);
}
} // namespace
void Downstream::reset_upstream_rtimer() {
if (get_config()->http2.timeout.stream_read == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
reset_timer(loop, &upstream_rtimer_);
}
void Downstream::reset_upstream_wtimer() {
auto loop = upstream_->get_client_handler()->get_loop();
auto &timeoutconf = get_config()->http2.timeout;
if (timeoutconf.stream_write != 0.) {
reset_timer(loop, &upstream_wtimer_);
}
if (timeoutconf.stream_read != 0.) {
try_reset_timer(loop, &upstream_rtimer_);
}
}
void Downstream::ensure_upstream_wtimer() {
if (get_config()->http2.timeout.stream_write == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
ensure_timer(loop, &upstream_wtimer_);
}
void Downstream::disable_upstream_rtimer() {
if (get_config()->http2.timeout.stream_read == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
disable_timer(loop, &upstream_rtimer_);
}
void Downstream::disable_upstream_wtimer() {
if (get_config()->http2.timeout.stream_write == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
disable_timer(loop, &upstream_wtimer_);
}
void Downstream::reset_downstream_rtimer() {
if (get_config()->http2.timeout.stream_read == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
reset_timer(loop, &downstream_rtimer_);
}
void Downstream::reset_downstream_wtimer() {
auto loop = upstream_->get_client_handler()->get_loop();
auto &timeoutconf = get_config()->http2.timeout;
if (timeoutconf.stream_write != 0.) {
reset_timer(loop, &downstream_wtimer_);
}
if (timeoutconf.stream_read != 0.) {
try_reset_timer(loop, &downstream_rtimer_);
}
}
void Downstream::ensure_downstream_wtimer() {
if (get_config()->http2.timeout.stream_write == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
ensure_timer(loop, &downstream_wtimer_);
}
void Downstream::disable_downstream_rtimer() {
if (get_config()->http2.timeout.stream_read == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
disable_timer(loop, &downstream_rtimer_);
}
void Downstream::disable_downstream_wtimer() {
if (get_config()->http2.timeout.stream_write == 0.) {
return;
}
auto loop = upstream_->get_client_handler()->get_loop();
disable_timer(loop, &downstream_wtimer_);
}
bool Downstream::accesslog_ready() const {
return !accesslog_written_ && resp_.http_status > 0;
}
void Downstream::add_retry() { ++num_retry_; }
bool Downstream::no_more_retry() const { return num_retry_ > 50; }
void Downstream::set_request_downstream_host(const StringRef &host) {
request_downstream_host_ = host;
}
void Downstream::set_request_pending(bool f) { request_pending_ = f; }
bool Downstream::get_request_pending() const { return request_pending_; }
void Downstream::set_request_header_sent(bool f) { request_header_sent_ = f; }
bool Downstream::get_request_header_sent() const {
return request_header_sent_;
}
bool Downstream::request_submission_ready() const {
return (request_state_ == DownstreamState::HEADER_COMPLETE ||
request_state_ == DownstreamState::MSG_COMPLETE) &&
(request_pending_ || !request_header_sent_) &&
response_state_ == DownstreamState::INITIAL;
}
DispatchState Downstream::get_dispatch_state() const { return dispatch_state_; }
void Downstream::set_dispatch_state(DispatchState s) { dispatch_state_ = s; }
void Downstream::attach_blocked_link(BlockedLink *l) {
assert(!blocked_link_);
l->downstream = this;
blocked_link_ = l;
}
BlockedLink *Downstream::detach_blocked_link() {
auto link = blocked_link_;
blocked_link_ = nullptr;
return link;
}
bool Downstream::can_detach_downstream_connection() const {
// We should check request and response buffer. If request buffer
// is not empty, then we might leave downstream connection in weird
// state, especially for HTTP/1.1
return dconn_ && response_state_ == DownstreamState::MSG_COMPLETE &&
request_state_ == DownstreamState::MSG_COMPLETE && !upgraded_ &&
!resp_.connection_close && request_buf_.rleft() == 0;
}
DefaultMemchunks Downstream::pop_response_buf() {
return std::move(response_buf_);
}
void Downstream::set_assoc_stream_id(int32_t stream_id) {
assoc_stream_id_ = stream_id;
}
int32_t Downstream::get_assoc_stream_id() const { return assoc_stream_id_; }
BlockAllocator &Downstream::get_block_allocator() { return balloc_; }
void Downstream::add_rcbuf(nghttp2_rcbuf *rcbuf) {
nghttp2_rcbuf_incref(rcbuf);
rcbufs_.push_back(rcbuf);
}
void Downstream::set_downstream_addr_group(
const std::shared_ptr<DownstreamAddrGroup> &group) {
group_ = group;
}
void Downstream::set_addr(const DownstreamAddr *addr) { addr_ = addr; }
const DownstreamAddr *Downstream::get_addr() const { return addr_; }
void Downstream::set_accesslog_written(bool f) { accesslog_written_ = f; }
void Downstream::renew_affinity_cookie(uint32_t h) {
affinity_cookie_ = h;
new_affinity_cookie_ = true;
}
uint32_t Downstream::get_affinity_cookie_to_send() const {
if (new_affinity_cookie_) {
return affinity_cookie_;
}
return 0;
}
DefaultMemchunks *Downstream::get_blocked_request_buf() {
return &blocked_request_buf_;
}
bool Downstream::get_blocked_request_data_eof() const {
return blocked_request_data_eof_;
}
void Downstream::set_blocked_request_data_eof(bool f) {
blocked_request_data_eof_ = f;
}
void Downstream::set_ws_key(const StringRef &key) { ws_key_ = key; }
} // namespace shrpx
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