diff options
Diffstat (limited to 'src/core/lib/channel/http_server_filter.c')
| -rw-r--r-- | src/core/lib/channel/http_server_filter.c | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/src/core/lib/channel/http_server_filter.c b/src/core/lib/channel/http_server_filter.c index 5ce51f9016..0f2bf97824 100644 --- a/src/core/lib/channel/http_server_filter.c +++ b/src/core/lib/channel/http_server_filter.c @@ -49,17 +49,32 @@ typedef struct call_data { uint8_t seen_scheme; uint8_t seen_te_trailers; uint8_t seen_authority; + uint8_t seen_payload_bin; grpc_linked_mdelem status; grpc_linked_mdelem content_type; + /* flag to ensure payload_bin is delivered only once */ + uint8_t payload_bin_delivered; + grpc_metadata_batch *recv_initial_metadata; bool *recv_idempotent_request; + bool *recv_cacheable_request; /** Closure to call when finished with the hs_on_recv hook */ grpc_closure *on_done_recv; + /** Closure to call when we retrieve read message from the payload-bin header + */ + grpc_closure *recv_message_ready; + grpc_closure *on_complete; + grpc_byte_stream **pp_recv_message; + gpr_slice_buffer read_slice_buffer; + grpc_slice_buffer_stream read_stream; + /** Receive closures are chained: we inject this closure as the on_done_recv up-call on transport_op, and remember to call our on_done_recv member after handling it. */ grpc_closure hs_on_recv; + grpc_closure hs_on_complete; + grpc_closure hs_recv_message_ready; } call_data; typedef struct channel_data { uint8_t unused; } channel_data; @@ -76,16 +91,20 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) { /* Check if it is one of the headers we care about. */ if (md == GRPC_MDELEM_TE_TRAILERS || md == GRPC_MDELEM_METHOD_POST || - md == GRPC_MDELEM_METHOD_PUT || md == GRPC_MDELEM_SCHEME_HTTP || - md == GRPC_MDELEM_SCHEME_HTTPS || + md == GRPC_MDELEM_METHOD_PUT || md == GRPC_MDELEM_METHOD_GET || + md == GRPC_MDELEM_SCHEME_HTTP || md == GRPC_MDELEM_SCHEME_HTTPS || md == GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC) { /* swallow it */ if (md == GRPC_MDELEM_METHOD_POST) { calld->seen_method = 1; *calld->recv_idempotent_request = false; + *calld->recv_cacheable_request = false; } else if (md == GRPC_MDELEM_METHOD_PUT) { calld->seen_method = 1; *calld->recv_idempotent_request = true; + } else if (md == GRPC_MDELEM_METHOD_GET) { + calld->seen_method = 1; + *calld->recv_cacheable_request = true; } else if (md->key == GRPC_MDSTR_SCHEME) { calld->seen_scheme = 1; } else if (md == GRPC_MDELEM_TE_TRAILERS) { @@ -137,6 +156,16 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) { GRPC_MDSTR_AUTHORITY, GRPC_MDSTR_REF(md->value)); calld->seen_authority = 1; return authority; + } else if (md->key == GRPC_MDSTR_GRPC_PAYLOAD_BIN) { + /* Retrieve the payload from the value of the 'grpc-internal-payload-bin' + header field */ + calld->seen_payload_bin = 1; + gpr_slice_buffer_init(&calld->read_slice_buffer); + gpr_slice_buffer_add(&calld->read_slice_buffer, + gpr_slice_ref(md->value->slice)); + grpc_slice_buffer_stream_init(&calld->read_stream, + &calld->read_slice_buffer, 0); + return NULL; } else { return md; } @@ -189,6 +218,36 @@ static void hs_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, GRPC_ERROR_UNREF(err); } +static void hs_on_complete(grpc_exec_ctx *exec_ctx, void *user_data, + grpc_error *err) { + grpc_call_element *elem = user_data; + call_data *calld = elem->call_data; + /* Call recv_message_ready if we got the payload via the header field */ + if (calld->seen_payload_bin && calld->recv_message_ready != NULL) { + *calld->pp_recv_message = calld->payload_bin_delivered + ? NULL + : (grpc_byte_stream *)&calld->read_stream; + calld->recv_message_ready->cb(exec_ctx, calld->recv_message_ready->cb_arg, + err); + calld->recv_message_ready = NULL; + calld->payload_bin_delivered = true; + } + calld->on_complete->cb(exec_ctx, calld->on_complete->cb_arg, err); +} + +static void hs_recv_message_ready(grpc_exec_ctx *exec_ctx, void *user_data, + grpc_error *err) { + grpc_call_element *elem = user_data; + call_data *calld = elem->call_data; + if (calld->seen_payload_bin) { + /* do nothing. This is probably a GET request, and payload will be returned + in hs_on_complete callback. */ + } else { + calld->recv_message_ready->cb(exec_ctx, calld->recv_message_ready->cb_arg, + err); + } +} + static void hs_mutate_op(grpc_call_element *elem, grpc_transport_stream_op *op) { /* grab pointers to our data from the call element */ @@ -206,11 +265,25 @@ static void hs_mutate_op(grpc_call_element *elem, if (op->recv_initial_metadata) { /* substitute our callback for the higher callback */ GPR_ASSERT(op->recv_idempotent_request != NULL); + GPR_ASSERT(op->recv_cacheable_request != NULL); calld->recv_initial_metadata = op->recv_initial_metadata; calld->recv_idempotent_request = op->recv_idempotent_request; + calld->recv_cacheable_request = op->recv_cacheable_request; calld->on_done_recv = op->recv_initial_metadata_ready; op->recv_initial_metadata_ready = &calld->hs_on_recv; } + + if (op->recv_message) { + calld->recv_message_ready = op->recv_message_ready; + calld->pp_recv_message = op->recv_message; + if (op->recv_message_ready) { + op->recv_message_ready = &calld->hs_recv_message_ready; + } + if (op->on_complete) { + calld->on_complete = op->on_complete; + op->on_complete = &calld->hs_on_complete; + } + } } static void hs_start_transport_op(grpc_exec_ctx *exec_ctx, @@ -232,6 +305,8 @@ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx, /* initialize members */ memset(calld, 0, sizeof(*calld)); grpc_closure_init(&calld->hs_on_recv, hs_on_recv, elem); + grpc_closure_init(&calld->hs_on_complete, hs_on_complete, elem); + grpc_closure_init(&calld->hs_recv_message_ready, hs_recv_message_ready, elem); return GRPC_ERROR_NONE; } |