diff options
Diffstat (limited to 'src/core/lib/http/httpcli.c')
| -rw-r--r-- | src/core/lib/http/httpcli.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/src/core/lib/http/httpcli.c b/src/core/lib/http/httpcli.c new file mode 100644 index 0000000000..aab28ad8b6 --- /dev/null +++ b/src/core/lib/http/httpcli.c @@ -0,0 +1,293 @@ +/* + * + * Copyright 2015-2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "src/core/lib/http/httpcli.h" +#include "src/core/lib/iomgr/sockaddr.h" + +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> +#include <grpc/support/string_util.h> + +#include "src/core/lib/http/format_request.h" +#include "src/core/lib/http/parser.h" +#include "src/core/lib/iomgr/endpoint.h" +#include "src/core/lib/iomgr/iomgr_internal.h" +#include "src/core/lib/iomgr/resolve_address.h" +#include "src/core/lib/iomgr/tcp_client.h" +#include "src/core/lib/support/string.h" + +typedef struct { + gpr_slice request_text; + grpc_http_parser parser; + grpc_resolved_addresses *addresses; + size_t next_address; + grpc_endpoint *ep; + char *host; + char *ssl_host_override; + gpr_timespec deadline; + int have_read_byte; + const grpc_httpcli_handshaker *handshaker; + grpc_httpcli_response_cb on_response; + void *user_data; + grpc_httpcli_context *context; + grpc_pollset *pollset; + grpc_iomgr_object iomgr_obj; + gpr_slice_buffer incoming; + gpr_slice_buffer outgoing; + grpc_closure on_read; + grpc_closure done_write; + grpc_closure connected; +} internal_request; + +static grpc_httpcli_get_override g_get_override = NULL; +static grpc_httpcli_post_override g_post_override = NULL; + +static void plaintext_handshake(grpc_exec_ctx *exec_ctx, void *arg, + grpc_endpoint *endpoint, const char *host, + void (*on_done)(grpc_exec_ctx *exec_ctx, + void *arg, + grpc_endpoint *endpoint)) { + on_done(exec_ctx, arg, endpoint); +} + +const grpc_httpcli_handshaker grpc_httpcli_plaintext = {"http", + plaintext_handshake}; + +void grpc_httpcli_context_init(grpc_httpcli_context *context) { + context->pollset_set = grpc_pollset_set_create(); +} + +void grpc_httpcli_context_destroy(grpc_httpcli_context *context) { + grpc_pollset_set_destroy(context->pollset_set); +} + +static void next_address(grpc_exec_ctx *exec_ctx, internal_request *req); + +static void finish(grpc_exec_ctx *exec_ctx, internal_request *req, + int success) { + grpc_pollset_set_del_pollset(exec_ctx, req->context->pollset_set, + req->pollset); + req->on_response(exec_ctx, req->user_data, + success ? &req->parser.http.response : NULL); + grpc_http_parser_destroy(&req->parser); + if (req->addresses != NULL) { + grpc_resolved_addresses_destroy(req->addresses); + } + if (req->ep != NULL) { + grpc_endpoint_destroy(exec_ctx, req->ep); + } + gpr_slice_unref(req->request_text); + gpr_free(req->host); + gpr_free(req->ssl_host_override); + grpc_iomgr_unregister_object(&req->iomgr_obj); + gpr_slice_buffer_destroy(&req->incoming); + gpr_slice_buffer_destroy(&req->outgoing); + gpr_free(req); +} + +static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success); + +static void do_read(grpc_exec_ctx *exec_ctx, internal_request *req) { + grpc_endpoint_read(exec_ctx, req->ep, &req->incoming, &req->on_read); +} + +static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success) { + internal_request *req = user_data; + size_t i; + + for (i = 0; i < req->incoming.count; i++) { + if (GPR_SLICE_LENGTH(req->incoming.slices[i])) { + req->have_read_byte = 1; + if (!grpc_http_parser_parse(&req->parser, req->incoming.slices[i])) { + finish(exec_ctx, req, 0); + return; + } + } + } + + if (success) { + do_read(exec_ctx, req); + } else if (!req->have_read_byte) { + next_address(exec_ctx, req); + } else { + int parse_success = grpc_http_parser_eof(&req->parser); + if (parse_success && (req->parser.type != GRPC_HTTP_RESPONSE)) { + parse_success = 0; + } + finish(exec_ctx, req, parse_success); + } +} + +static void on_written(grpc_exec_ctx *exec_ctx, internal_request *req) { + do_read(exec_ctx, req); +} + +static void done_write(grpc_exec_ctx *exec_ctx, void *arg, bool success) { + internal_request *req = arg; + if (success) { + on_written(exec_ctx, req); + } else { + next_address(exec_ctx, req); + } +} + +static void start_write(grpc_exec_ctx *exec_ctx, internal_request *req) { + gpr_slice_ref(req->request_text); + gpr_slice_buffer_add(&req->outgoing, req->request_text); + grpc_endpoint_write(exec_ctx, req->ep, &req->outgoing, &req->done_write); +} + +static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg, + grpc_endpoint *ep) { + internal_request *req = arg; + + if (!ep) { + next_address(exec_ctx, req); + return; + } + + req->ep = ep; + start_write(exec_ctx, req); +} + +static void on_connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) { + internal_request *req = arg; + + if (!req->ep) { + next_address(exec_ctx, req); + return; + } + req->handshaker->handshake( + exec_ctx, req, req->ep, + req->ssl_host_override ? req->ssl_host_override : req->host, + on_handshake_done); +} + +static void next_address(grpc_exec_ctx *exec_ctx, internal_request *req) { + grpc_resolved_address *addr; + if (req->next_address == req->addresses->naddrs) { + finish(exec_ctx, req, 0); + return; + } + addr = &req->addresses->addrs[req->next_address++]; + grpc_closure_init(&req->connected, on_connected, req); + grpc_tcp_client_connect( + exec_ctx, &req->connected, &req->ep, req->context->pollset_set, + (struct sockaddr *)&addr->addr, addr->len, req->deadline); +} + +static void on_resolved(grpc_exec_ctx *exec_ctx, void *arg, + grpc_resolved_addresses *addresses) { + internal_request *req = arg; + if (!addresses) { + finish(exec_ctx, req, 0); + return; + } + req->addresses = addresses; + req->next_address = 0; + next_address(exec_ctx, req); +} + +static void internal_request_begin( + grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context, + grpc_pollset *pollset, const grpc_httpcli_request *request, + gpr_timespec deadline, grpc_httpcli_response_cb on_response, + void *user_data, const char *name, gpr_slice request_text) { + internal_request *req = gpr_malloc(sizeof(internal_request)); + memset(req, 0, sizeof(*req)); + req->request_text = request_text; + grpc_http_parser_init(&req->parser); + req->on_response = on_response; + req->user_data = user_data; + req->deadline = deadline; + req->handshaker = + request->handshaker ? request->handshaker : &grpc_httpcli_plaintext; + req->context = context; + req->pollset = pollset; + grpc_closure_init(&req->on_read, on_read, req); + grpc_closure_init(&req->done_write, done_write, req); + gpr_slice_buffer_init(&req->incoming); + gpr_slice_buffer_init(&req->outgoing); + grpc_iomgr_register_object(&req->iomgr_obj, name); + req->host = gpr_strdup(request->host); + req->ssl_host_override = gpr_strdup(request->ssl_host_override); + + grpc_pollset_set_add_pollset(exec_ctx, req->context->pollset_set, + req->pollset); + grpc_resolve_address(request->host, req->handshaker->default_port, + on_resolved, req); +} + +void grpc_httpcli_get(grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context, + grpc_pollset *pollset, + const grpc_httpcli_request *request, + gpr_timespec deadline, + grpc_httpcli_response_cb on_response, void *user_data) { + char *name; + if (g_get_override && + g_get_override(exec_ctx, request, deadline, on_response, user_data)) { + return; + } + gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->http.path); + internal_request_begin(exec_ctx, context, pollset, request, deadline, + on_response, user_data, name, + grpc_httpcli_format_get_request(request)); + gpr_free(name); +} + +void grpc_httpcli_post(grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context, + grpc_pollset *pollset, + const grpc_httpcli_request *request, + const char *body_bytes, size_t body_size, + gpr_timespec deadline, + grpc_httpcli_response_cb on_response, void *user_data) { + char *name; + if (g_post_override && + g_post_override(exec_ctx, request, body_bytes, body_size, deadline, + on_response, user_data)) { + return; + } + gpr_asprintf(&name, "HTTP:POST:%s:%s", request->host, request->http.path); + internal_request_begin( + exec_ctx, context, pollset, request, deadline, on_response, user_data, + name, grpc_httpcli_format_post_request(request, body_bytes, body_size)); + gpr_free(name); +} + +void grpc_httpcli_set_override(grpc_httpcli_get_override get, + grpc_httpcli_post_override post) { + g_get_override = get; + g_post_override = post; +} |