The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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279 lines
8.8 KiB
279 lines
8.8 KiB
/* |
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* |
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* Copyright 2015, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include "src/core/iomgr/sockaddr.h" |
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#include "src/core/httpcli/httpcli.h" |
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#include <string.h> |
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#include "src/core/iomgr/endpoint.h" |
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#include "src/core/iomgr/resolve_address.h" |
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#include "src/core/iomgr/tcp_client.h" |
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#include "src/core/httpcli/format_request.h" |
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#include "src/core/httpcli/httpcli_security_connector.h" |
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#include "src/core/httpcli/parser.h" |
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#include "src/core/security/secure_transport_setup.h" |
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#include "src/core/support/string.h" |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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typedef struct { |
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gpr_slice request_text; |
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grpc_httpcli_parser parser; |
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grpc_resolved_addresses *addresses; |
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size_t next_address; |
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grpc_endpoint *ep; |
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char *host; |
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gpr_timespec deadline; |
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int have_read_byte; |
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int use_ssl; |
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grpc_httpcli_response_cb on_response; |
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void *user_data; |
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} internal_request; |
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static grpc_httpcli_get_override g_get_override = NULL; |
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static grpc_httpcli_post_override g_post_override = NULL; |
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static void next_address(internal_request *req); |
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static void finish(internal_request *req, int success) { |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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req->on_response(req->user_data, success ? &req->parser.r : NULL); |
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grpc_httpcli_parser_destroy(&req->parser); |
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if (req->addresses != NULL) { |
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grpc_resolved_addresses_destroy(req->addresses); |
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} |
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if (req->ep != NULL) { |
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grpc_endpoint_destroy(req->ep); |
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} |
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gpr_slice_unref(req->request_text); |
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gpr_free(req->host); |
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gpr_free(req); |
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} |
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static void on_read(void *user_data, gpr_slice *slices, size_t nslices, |
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grpc_endpoint_cb_status status) { |
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internal_request *req = user_data; |
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size_t i; |
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gpr_log(GPR_DEBUG, "%s nslices=%d status=%d", __FUNCTION__, nslices, status); |
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for (i = 0; i < nslices; i++) { |
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if (GPR_SLICE_LENGTH(slices[i])) { |
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req->have_read_byte = 1; |
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if (!grpc_httpcli_parser_parse(&req->parser, slices[i])) { |
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finish(req, 0); |
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goto done; |
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} |
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} |
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} |
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switch (status) { |
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case GRPC_ENDPOINT_CB_OK: |
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grpc_endpoint_notify_on_read(req->ep, on_read, req); |
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break; |
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case GRPC_ENDPOINT_CB_EOF: |
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case GRPC_ENDPOINT_CB_ERROR: |
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case GRPC_ENDPOINT_CB_SHUTDOWN: |
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if (!req->have_read_byte) { |
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next_address(req); |
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} else { |
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finish(req, grpc_httpcli_parser_eof(&req->parser)); |
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} |
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break; |
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} |
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done: |
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for (i = 0; i < nslices; i++) { |
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gpr_slice_unref(slices[i]); |
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} |
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} |
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static void on_written(internal_request *req) { |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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grpc_endpoint_notify_on_read(req->ep, on_read, req); |
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} |
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static void done_write(void *arg, grpc_endpoint_cb_status status) { |
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internal_request *req = arg; |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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switch (status) { |
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case GRPC_ENDPOINT_CB_OK: |
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on_written(req); |
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break; |
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case GRPC_ENDPOINT_CB_EOF: |
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case GRPC_ENDPOINT_CB_SHUTDOWN: |
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case GRPC_ENDPOINT_CB_ERROR: |
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next_address(req); |
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break; |
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} |
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} |
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static void start_write(internal_request *req) { |
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gpr_slice_ref(req->request_text); |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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switch ( |
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grpc_endpoint_write(req->ep, &req->request_text, 1, done_write, req)) { |
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case GRPC_ENDPOINT_WRITE_DONE: |
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on_written(req); |
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break; |
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case GRPC_ENDPOINT_WRITE_PENDING: |
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break; |
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case GRPC_ENDPOINT_WRITE_ERROR: |
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finish(req, 0); |
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break; |
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} |
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} |
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static void on_secure_transport_setup_done(void *rp, |
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grpc_security_status status, |
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grpc_endpoint *secure_endpoint) { |
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internal_request *req = rp; |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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if (status != GRPC_SECURITY_OK) { |
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gpr_log(GPR_ERROR, "Secure transport setup failed with error %d.", status); |
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finish(req, 0); |
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} else { |
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req->ep = secure_endpoint; |
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start_write(req); |
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} |
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} |
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static void on_connected(void *arg, grpc_endpoint *tcp) { |
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internal_request *req = arg; |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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if (!tcp) { |
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next_address(req); |
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return; |
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} |
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req->ep = tcp; |
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if (req->use_ssl) { |
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grpc_channel_security_connector *sc = NULL; |
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const unsigned char *pem_root_certs = NULL; |
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size_t pem_root_certs_size = grpc_get_default_ssl_roots(&pem_root_certs); |
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if (pem_root_certs == NULL || pem_root_certs_size == 0) { |
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gpr_log(GPR_ERROR, "Could not get default pem root certs."); |
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finish(req, 0); |
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return; |
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} |
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GPR_ASSERT(grpc_httpcli_ssl_channel_security_connector_create( |
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pem_root_certs, pem_root_certs_size, req->host, &sc) == |
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GRPC_SECURITY_OK); |
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grpc_setup_secure_transport(&sc->base, tcp, on_secure_transport_setup_done, |
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req); |
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grpc_security_connector_unref(&sc->base); |
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} else { |
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start_write(req); |
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} |
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} |
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static void next_address(internal_request *req) { |
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grpc_resolved_address *addr; |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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if (req->next_address == req->addresses->naddrs) { |
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finish(req, 0); |
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return; |
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} |
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addr = &req->addresses->addrs[req->next_address++]; |
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grpc_tcp_client_connect(on_connected, req, (struct sockaddr *)&addr->addr, |
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addr->len, req->deadline); |
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} |
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static void on_resolved(void *arg, grpc_resolved_addresses *addresses) { |
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internal_request *req = arg; |
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gpr_log(GPR_DEBUG, "%s", __FUNCTION__); |
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if (!addresses) { |
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finish(req, 0); |
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return; |
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} |
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req->addresses = addresses; |
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req->next_address = 0; |
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next_address(req); |
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} |
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void grpc_httpcli_get(const grpc_httpcli_request *request, |
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gpr_timespec deadline, |
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grpc_httpcli_response_cb on_response, void *user_data) { |
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internal_request *req; |
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if (g_get_override && |
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g_get_override(request, deadline, on_response, user_data)) { |
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return; |
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} |
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req = gpr_malloc(sizeof(internal_request)); |
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memset(req, 0, sizeof(*req)); |
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req->request_text = grpc_httpcli_format_get_request(request); |
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grpc_httpcli_parser_init(&req->parser); |
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req->on_response = on_response; |
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req->user_data = user_data; |
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req->deadline = deadline; |
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req->use_ssl = request->use_ssl; |
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if (req->use_ssl) { |
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req->host = gpr_strdup(request->host); |
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} |
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grpc_resolve_address(request->host, req->use_ssl ? "https" : "http", |
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on_resolved, req); |
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} |
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void grpc_httpcli_post(const grpc_httpcli_request *request, |
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const char *body_bytes, size_t body_size, |
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gpr_timespec deadline, |
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grpc_httpcli_response_cb on_response, void *user_data) { |
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internal_request *req; |
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if (g_post_override && g_post_override(request, body_bytes, body_size, |
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deadline, on_response, user_data)) { |
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return; |
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} |
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req = gpr_malloc(sizeof(internal_request)); |
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memset(req, 0, sizeof(*req)); |
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req->request_text = |
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grpc_httpcli_format_post_request(request, body_bytes, body_size); |
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grpc_httpcli_parser_init(&req->parser); |
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req->on_response = on_response; |
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req->user_data = user_data; |
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req->deadline = deadline; |
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req->use_ssl = request->use_ssl; |
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if (req->use_ssl) { |
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req->host = gpr_strdup(request->host); |
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} |
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grpc_resolve_address(request->host, req->use_ssl ? "https" : "http", |
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on_resolved, req); |
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} |
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void grpc_httpcli_set_override(grpc_httpcli_get_override get, |
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grpc_httpcli_post_override post) { |
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g_get_override = get; |
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g_post_override = post; |
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}
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