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Merge pull request #13579 from sreecha/rq-fix

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Properly shutdown endpoints in h2_http_proxy
reviewable/pr10684/r13^2
Sree Kuchibhotla 7 years ago committed by GitHub
parent f7a8eb7b22 9a434371e2
commit f3b73e524f
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1 changed files with 76 additions and 31 deletions
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  1. 107
      test/core/end2end/fixtures/http_proxy_fixture.cc

107
test/core/end2end/fixtures/http_proxy_fixture.cc
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@ -68,6 +68,9 @@ struct grpc_end2end_http_proxy {
// Connection handling
//
// proxy_connection structure is only accessed in the closures which are all
// scheduled under the same combiner lock. So there is is no need for a mutex to
// protect this structure.
typedef struct proxy_connection {
grpc_end2end_http_proxy* proxy;
@ -78,6 +81,8 @@ typedef struct proxy_connection {
grpc_pollset_set* pollset_set;
// NOTE: All the closures execute under proxy->combiner lock. Which means
// there will not be any data-races between the closures
grpc_closure on_read_request_done;
grpc_closure on_server_connect_done;
grpc_closure on_write_response_done;
@ -86,6 +91,13 @@ typedef struct proxy_connection {
grpc_closure on_server_read_done;
grpc_closure on_server_write_done;
bool client_read_failed : 1;
bool client_write_failed : 1;
bool client_shutdown : 1;
bool server_read_failed : 1;
bool server_write_failed : 1;
bool server_shutdown : 1;
grpc_slice_buffer client_read_buffer;
grpc_slice_buffer client_deferred_write_buffer;
bool client_is_writing;
@ -129,21 +141,53 @@ static void proxy_connection_unref(grpc_exec_ctx* exec_ctx,
}
}
enum failure_type {
SETUP_FAILED, // To be used before we start proxying.
CLIENT_READ_FAILED,
CLIENT_WRITE_FAILED,
SERVER_READ_FAILED,
SERVER_WRITE_FAILED,
};
// Helper function to shut down the proxy connection.
// Does NOT take ownership of a reference to error.
static void proxy_connection_failed(grpc_exec_ctx* exec_ctx,
proxy_connection* conn, bool is_client,
const char* prefix, grpc_error* error) {
const char* msg = grpc_error_string(error);
gpr_log(GPR_INFO, "%s: %s", prefix, msg);
grpc_endpoint_shutdown(exec_ctx, conn->client_endpoint,
GRPC_ERROR_REF(error));
if (conn->server_endpoint != nullptr) {
proxy_connection* conn,
failure_type failure, const char* prefix,
grpc_error* error) {
gpr_log(GPR_INFO, "%s: %s", prefix, grpc_error_string(error));
// Decide whether we should shut down the client and server.
bool shutdown_client = false;
bool shutdown_server = false;
if (failure == SETUP_FAILED) {
shutdown_client = true;
shutdown_server = true;
} else {
if ((failure == CLIENT_READ_FAILED && conn->client_write_failed) ||
(failure == CLIENT_WRITE_FAILED && conn->client_read_failed) ||
(failure == SERVER_READ_FAILED && !conn->client_is_writing)) {
shutdown_client = true;
}
if ((failure == SERVER_READ_FAILED && conn->server_write_failed) ||
(failure == SERVER_WRITE_FAILED && conn->server_read_failed) ||
(failure == CLIENT_READ_FAILED && !conn->server_is_writing)) {
shutdown_server = true;
}
}
// If we decided to shut down either one and have not yet done so, do so.
if (shutdown_client && !conn->client_shutdown) {
grpc_endpoint_shutdown(exec_ctx, conn->client_endpoint,
GRPC_ERROR_REF(error));
conn->client_shutdown = true;
}
if (shutdown_server && !conn->server_shutdown &&
(conn->server_endpoint != nullptr)) {
grpc_endpoint_shutdown(exec_ctx, conn->server_endpoint,
GRPC_ERROR_REF(error));
conn->server_shutdown = true;
}
// Unref the connection.
proxy_connection_unref(exec_ctx, conn, "conn_failed");
GRPC_ERROR_UNREF(error);
}
// Callback for writing proxy data to the client.
@ -152,8 +196,8 @@ static void on_client_write_done(grpc_exec_ctx* exec_ctx, void* arg,
proxy_connection* conn = (proxy_connection*)arg;
conn->client_is_writing = false;
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy client write", error);
proxy_connection_failed(exec_ctx, conn, CLIENT_WRITE_FAILED,
"HTTP proxy client write", GRPC_ERROR_REF(error));
return;
}
// Clear write buffer (the data we just wrote).
@ -179,8 +223,8 @@ static void on_server_write_done(grpc_exec_ctx* exec_ctx, void* arg,
proxy_connection* conn = (proxy_connection*)arg;
conn->server_is_writing = false;
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, false /* is_client */,
"HTTP proxy server write", error);
proxy_connection_failed(exec_ctx, conn, SERVER_WRITE_FAILED,
"HTTP proxy server write", GRPC_ERROR_REF(error));
return;
}
// Clear write buffer (the data we just wrote).
@ -206,8 +250,8 @@ static void on_client_read_done(grpc_exec_ctx* exec_ctx, void* arg,
grpc_error* error) {
proxy_connection* conn = (proxy_connection*)arg;
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy client read", error);
proxy_connection_failed(exec_ctx, conn, CLIENT_READ_FAILED,
"HTTP proxy client read", GRPC_ERROR_REF(error));
return;
}
// If there is already a pending write (i.e., server_write_buffer is
@ -239,8 +283,8 @@ static void on_server_read_done(grpc_exec_ctx* exec_ctx, void* arg,
grpc_error* error) {
proxy_connection* conn = (proxy_connection*)arg;
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, false /* is_client */,
"HTTP proxy server read", error);
proxy_connection_failed(exec_ctx, conn, SERVER_READ_FAILED,
"HTTP proxy server read", GRPC_ERROR_REF(error));
return;
}
// If there is already a pending write (i.e., client_write_buffer is
@ -272,8 +316,8 @@ static void on_write_response_done(grpc_exec_ctx* exec_ctx, void* arg,
proxy_connection* conn = (proxy_connection*)arg;
conn->client_is_writing = false;
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy write response", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy write response", GRPC_ERROR_REF(error));
return;
}
// Clear write buffer.
@ -301,8 +345,8 @@ static void on_server_connect_done(grpc_exec_ctx* exec_ctx, void* arg,
// connection failed. However, for the purposes of this test code,
// it's fine to pretend this is a client-side error, which will
// cause the client connection to be dropped.
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy server connect", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy server connect", GRPC_ERROR_REF(error));
return;
}
// We've established a connection, so send back a 200 response code to
@ -351,8 +395,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
gpr_log(GPR_DEBUG, "on_read_request_done: %p %s", conn,
grpc_error_string(error));
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy read request", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy read request", GRPC_ERROR_REF(error));
return;
}
// Read request and feed it to the parser.
@ -361,8 +405,9 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
error = grpc_http_parser_parse(
&conn->http_parser, conn->client_read_buffer.slices[i], nullptr);
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy request parse", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy request parse",
GRPC_ERROR_REF(error));
GRPC_ERROR_UNREF(error);
return;
}
@ -382,8 +427,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
conn->http_request.method);
error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy read request", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy read request", GRPC_ERROR_REF(error));
GRPC_ERROR_UNREF(error);
return;
}
@ -403,8 +448,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
if (!client_authenticated) {
const char* msg = "HTTP Connect could not verify authentication";
error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(msg);
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy read request", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy read request", GRPC_ERROR_REF(error));
GRPC_ERROR_UNREF(error);
return;
}
@ -414,8 +459,8 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
error = grpc_blocking_resolve_address(conn->http_request.path, "80",
&resolved_addresses);
if (error != GRPC_ERROR_NONE) {
proxy_connection_failed(exec_ctx, conn, true /* is_client */,
"HTTP proxy DNS lookup", error);
proxy_connection_failed(exec_ctx, conn, SETUP_FAILED,
"HTTP proxy DNS lookup", GRPC_ERROR_REF(error));
GRPC_ERROR_UNREF(error);
return;
}

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