diff options
Diffstat (limited to 'src/core/lib/channel/http_client_filter.c')
| -rw-r--r-- | src/core/lib/channel/http_client_filter.c | 96 |
1 files changed, 70 insertions, 26 deletions
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c index 1dc05fb20d..1a2d08dda5 100644 --- a/src/core/lib/channel/http_client_filter.c +++ b/src/core/lib/channel/http_client_filter.c @@ -36,6 +36,7 @@ #include <grpc/support/string_util.h> #include <string.h> #include "src/core/lib/profiling/timers.h" +#include "src/core/lib/slice/percent_encoding.h" #include "src/core/lib/support/string.h" #include "src/core/lib/transport/static_metadata.h" #include "src/core/lib/transport/transport_impl.h" @@ -56,27 +57,30 @@ typedef struct call_data { grpc_linked_mdelem payload_bin; grpc_metadata_batch *recv_initial_metadata; + grpc_metadata_batch *recv_trailing_metadata; uint8_t *payload_bytes; /* Vars to read data off of send_message */ grpc_transport_stream_op send_op; uint32_t send_length; uint32_t send_flags; - gpr_slice incoming_slice; + grpc_slice incoming_slice; grpc_slice_buffer_stream replacement_stream; - gpr_slice_buffer slices; + grpc_slice_buffer slices; /* flag that indicates that all slices of send_messages aren't availble */ bool send_message_blocked; /** Closure to call when finished with the hc_on_recv hook */ - grpc_closure *on_done_recv; + grpc_closure *on_done_recv_initial_metadata; + grpc_closure *on_done_recv_trailing_metadata; grpc_closure *on_complete; grpc_closure *post_send; /** 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 hc_on_recv; + grpc_closure hc_on_recv_initial_metadata; + grpc_closure hc_on_recv_trailing_metadata; grpc_closure hc_on_complete; grpc_closure got_slice; grpc_closure send_done; @@ -101,11 +105,21 @@ static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) { char *message_string; gpr_asprintf(&message_string, "Received http2 header with status: %s", grpc_mdstr_as_c_string(md->value)); - gpr_slice message = gpr_slice_from_copied_string(message_string); + grpc_slice message = grpc_slice_from_copied_string(message_string); gpr_free(message_string); grpc_call_element_send_close_with_message(a->exec_ctx, a->elem, GRPC_STATUS_CANCELLED, &message); return NULL; + } else if (md->key == GRPC_MDSTR_GRPC_MESSAGE) { + grpc_slice pct_decoded_msg = + grpc_permissive_percent_decode_slice(md->value->slice); + if (grpc_slice_is_equivalent(pct_decoded_msg, md->value->slice)) { + grpc_slice_unref(pct_decoded_msg); + return md; + } else { + return grpc_mdelem_from_metadata_strings( + GRPC_MDSTR_GRPC_MESSAGE, grpc_mdstr_from_slice(pct_decoded_msg)); + } } else if (md == GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC) { return NULL; } else if (md->key == GRPC_MDSTR_CONTENT_TYPE) { @@ -129,8 +143,8 @@ static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) { return md; } -static void hc_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, - grpc_error *error) { +static void hc_on_recv_initial_metadata(grpc_exec_ctx *exec_ctx, + void *user_data, grpc_error *error) { grpc_call_element *elem = user_data; call_data *calld = elem->call_data; client_recv_filter_args a; @@ -138,7 +152,21 @@ static void hc_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, a.exec_ctx = exec_ctx; grpc_metadata_batch_filter(calld->recv_initial_metadata, client_recv_filter, &a); - calld->on_done_recv->cb(exec_ctx, calld->on_done_recv->cb_arg, error); + grpc_closure_run(exec_ctx, calld->on_done_recv_initial_metadata, + GRPC_ERROR_REF(error)); +} + +static void hc_on_recv_trailing_metadata(grpc_exec_ctx *exec_ctx, + void *user_data, grpc_error *error) { + grpc_call_element *elem = user_data; + call_data *calld = elem->call_data; + client_recv_filter_args a; + a.elem = elem; + a.exec_ctx = exec_ctx; + grpc_metadata_batch_filter(calld->recv_trailing_metadata, client_recv_filter, + &a); + grpc_closure_run(exec_ctx, calld->on_done_recv_trailing_metadata, + GRPC_ERROR_REF(error)); } static void hc_on_complete(grpc_exec_ctx *exec_ctx, void *user_data, @@ -155,7 +183,7 @@ static void hc_on_complete(grpc_exec_ctx *exec_ctx, void *user_data, static void send_done(grpc_exec_ctx *exec_ctx, void *elemp, grpc_error *error) { grpc_call_element *elem = elemp; call_data *calld = elem->call_data; - gpr_slice_buffer_reset_and_unref(&calld->slices); + grpc_slice_buffer_reset_and_unref(&calld->slices); calld->post_send->cb(exec_ctx, calld->post_send->cb_arg, error); } @@ -176,10 +204,10 @@ static void continue_send_message(grpc_exec_ctx *exec_ctx, while (grpc_byte_stream_next(exec_ctx, calld->send_op.send_message, &calld->incoming_slice, ~(size_t)0, &calld->got_slice)) { - memcpy(wrptr, GPR_SLICE_START_PTR(calld->incoming_slice), - GPR_SLICE_LENGTH(calld->incoming_slice)); - wrptr += GPR_SLICE_LENGTH(calld->incoming_slice); - gpr_slice_buffer_add(&calld->slices, calld->incoming_slice); + memcpy(wrptr, GRPC_SLICE_START_PTR(calld->incoming_slice), + GRPC_SLICE_LENGTH(calld->incoming_slice)); + wrptr += GRPC_SLICE_LENGTH(calld->incoming_slice); + grpc_slice_buffer_add(&calld->slices, calld->incoming_slice); if (calld->send_length == calld->slices.length) { calld->send_message_blocked = false; break; @@ -191,7 +219,7 @@ static void got_slice(grpc_exec_ctx *exec_ctx, void *elemp, grpc_error *error) { grpc_call_element *elem = elemp; call_data *calld = elem->call_data; calld->send_message_blocked = false; - gpr_slice_buffer_add(&calld->slices, calld->incoming_slice); + grpc_slice_buffer_add(&calld->slices, calld->incoming_slice); if (calld->send_length == calld->slices.length) { /* Pass down the original send_message op that was blocked.*/ grpc_slice_buffer_stream_init(&calld->replacement_stream, &calld->slices, @@ -217,12 +245,15 @@ static void hc_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, message, and the payload is below the size threshold, and all the data for this request is immediately available. */ grpc_mdelem *method = GRPC_MDELEM_METHOD_POST; - calld->send_message_blocked = false; if ((op->send_initial_metadata_flags & GRPC_INITIAL_METADATA_CACHEABLE_REQUEST) && op->send_message != NULL && op->send_message->length < channeld->max_payload_size_for_get) { method = GRPC_MDELEM_METHOD_GET; + /* The following write to calld->send_message_blocked isn't racy with + reads in hc_start_transport_op (which deals with SEND_MESSAGE ops) because + being here means ops->send_message is not NULL, which is primarily + guarding the read there. */ calld->send_message_blocked = true; } else if (op->send_initial_metadata_flags & GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) { @@ -281,8 +312,15 @@ static void hc_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, if (op->recv_initial_metadata != NULL) { /* substitute our callback for the higher callback */ calld->recv_initial_metadata = op->recv_initial_metadata; - calld->on_done_recv = op->recv_initial_metadata_ready; - op->recv_initial_metadata_ready = &calld->hc_on_recv; + calld->on_done_recv_initial_metadata = op->recv_initial_metadata_ready; + op->recv_initial_metadata_ready = &calld->hc_on_recv_initial_metadata; + } + + if (op->recv_trailing_metadata != NULL) { + /* substitute our callback for the higher callback */ + calld->recv_trailing_metadata = op->recv_trailing_metadata; + calld->on_done_recv_trailing_metadata = op->on_complete; + op->on_complete = &calld->hc_on_recv_trailing_metadata; } } @@ -296,8 +334,7 @@ static void hc_start_transport_op(grpc_exec_ctx *exec_ctx, call_data *calld = elem->call_data; if (op->send_message != NULL && calld->send_message_blocked) { /* Don't forward the op. send_message contains slices that aren't ready - yet. The call will be forwarded by the op_complete of slice read call. - */ + yet. The call will be forwarded by the op_complete of slice read call. */ } else { grpc_call_next_op(exec_ctx, elem, op); } @@ -308,11 +345,16 @@ static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_call_element_args *args) { call_data *calld = elem->call_data; - calld->on_done_recv = NULL; + calld->on_done_recv_initial_metadata = NULL; + calld->on_done_recv_trailing_metadata = NULL; calld->on_complete = NULL; calld->payload_bytes = NULL; - gpr_slice_buffer_init(&calld->slices); - grpc_closure_init(&calld->hc_on_recv, hc_on_recv, elem); + calld->send_message_blocked = false; + grpc_slice_buffer_init(&calld->slices); + grpc_closure_init(&calld->hc_on_recv_initial_metadata, + hc_on_recv_initial_metadata, elem); + grpc_closure_init(&calld->hc_on_recv_trailing_metadata, + hc_on_recv_trailing_metadata, elem); grpc_closure_init(&calld->hc_on_complete, hc_on_complete, elem); grpc_closure_init(&calld->got_slice, got_slice, elem); grpc_closure_init(&calld->send_done, send_done, elem); @@ -324,7 +366,7 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, const grpc_call_final_info *final_info, void *ignored) { call_data *calld = elem->call_data; - gpr_slice_buffer_destroy(&calld->slices); + grpc_slice_buffer_destroy(&calld->slices); } static grpc_mdelem *scheme_from_args(const grpc_channel_args *args) { @@ -415,9 +457,9 @@ static grpc_mdstr *user_agent_from_args(const grpc_channel_args *args, } /* Constructor for channel_data */ -static void init_channel_elem(grpc_exec_ctx *exec_ctx, - grpc_channel_element *elem, - grpc_channel_element_args *args) { +static grpc_error *init_channel_elem(grpc_exec_ctx *exec_ctx, + grpc_channel_element *elem, + grpc_channel_element_args *args) { channel_data *chand = elem->channel_data; GPR_ASSERT(!args->is_last); GPR_ASSERT(args->optional_transport != NULL); @@ -428,6 +470,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx, GRPC_MDSTR_USER_AGENT, user_agent_from_args(args->channel_args, args->optional_transport->vtable->name)); + return GRPC_ERROR_NONE; } /* Destructor for channel data */ @@ -448,4 +491,5 @@ const grpc_channel_filter grpc_http_client_filter = { init_channel_elem, destroy_channel_elem, grpc_call_next_get_peer, + grpc_channel_next_get_info, "http-client"}; |