| /* |
| * |
| * Copyright 2015, 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/client_config/resolver_registry.h" |
| |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| #define MAX_RESOLVERS 10 |
| |
| static grpc_resolver_factory *g_all_of_the_resolvers[MAX_RESOLVERS]; |
| static int g_number_of_resolvers = 0; |
| |
| static char *g_default_resolver_prefix; |
| |
| void grpc_resolver_registry_init(const char *default_resolver_prefix) { |
| g_number_of_resolvers = 0; |
| g_default_resolver_prefix = gpr_strdup(default_resolver_prefix); |
| } |
| |
| void grpc_resolver_registry_shutdown(void) { |
| int i; |
| for (i = 0; i < g_number_of_resolvers; i++) { |
| grpc_resolver_factory_unref(g_all_of_the_resolvers[i]); |
| } |
| gpr_free(g_default_resolver_prefix); |
| } |
| |
| void grpc_register_resolver_type(grpc_resolver_factory *factory) { |
| int i; |
| for (i = 0; i < g_number_of_resolvers; i++) { |
| GPR_ASSERT(0 != strcmp(factory->vtable->scheme, |
| g_all_of_the_resolvers[i]->vtable->scheme)); |
| } |
| GPR_ASSERT(g_number_of_resolvers != MAX_RESOLVERS); |
| grpc_resolver_factory_ref(factory); |
| g_all_of_the_resolvers[g_number_of_resolvers++] = factory; |
| } |
| |
| static grpc_resolver_factory *lookup_factory(grpc_uri *uri) { |
| int i; |
| |
| /* handling NULL uri's here simplifies grpc_resolver_create */ |
| if (!uri) return NULL; |
| |
| for (i = 0; i < g_number_of_resolvers; i++) { |
| if (0 == strcmp(uri->scheme, g_all_of_the_resolvers[i]->vtable->scheme)) { |
| return g_all_of_the_resolvers[i]; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static grpc_resolver_factory *resolve_factory(const char *target, |
| grpc_uri **uri) { |
| char *tmp; |
| grpc_resolver_factory *factory = NULL; |
| |
| *uri = grpc_uri_parse(target, 1); |
| factory = lookup_factory(*uri); |
| if (factory == NULL && g_default_resolver_prefix != NULL) { |
| grpc_uri_destroy(*uri); |
| gpr_asprintf(&tmp, "%s%s", g_default_resolver_prefix, target); |
| *uri = grpc_uri_parse(tmp, 1); |
| factory = lookup_factory(*uri); |
| if (factory == NULL) { |
| grpc_uri_destroy(grpc_uri_parse(target, 0)); |
| grpc_uri_destroy(grpc_uri_parse(tmp, 0)); |
| gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target, tmp); |
| } |
| gpr_free(tmp); |
| } else if (factory == NULL) { |
| grpc_uri_destroy(grpc_uri_parse(target, 0)); |
| gpr_log(GPR_ERROR, "don't know how to resolve '%s'", target); |
| } |
| return factory; |
| } |
| |
| grpc_resolver *grpc_resolver_create( |
| const char *target, grpc_subchannel_factory *subchannel_factory) { |
| grpc_uri *uri = NULL; |
| grpc_resolver_factory *factory = resolve_factory(target, &uri); |
| grpc_resolver *resolver = |
| grpc_resolver_factory_create_resolver(factory, uri, subchannel_factory); |
| grpc_uri_destroy(uri); |
| return resolver; |
| } |
| |
| char *grpc_get_default_authority(const char *target) { |
| grpc_uri *uri = NULL; |
| grpc_resolver_factory *factory = resolve_factory(target, &uri); |
| char *authority = grpc_resolver_factory_get_default_authority(factory, uri); |
| grpc_uri_destroy(uri); |
| return authority; |
| } |