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* Copyright 2015, Google Inc.
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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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* * 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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* * 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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* 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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#include "src/core/security/credentials.h"
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#include "src/core/support/string.h"
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#include <grpc/grpc.h>
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#include <grpc/grpc_security.h>
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#include <grpc/support/alloc.h>
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#include <grpc/support/cmdline.h>
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#include <grpc/support/log.h>
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#include <grpc/support/slice.h>
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#include <grpc/support/sync.h>
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static void on_metadata_response(void *user_data,
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grpc_credentials_md *md_elems,
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grpc_credentials_status status) {
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synchronizer *sync = user_data;
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if (status == GRPC_CREDENTIALS_ERROR) {
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fprintf(stderr, "Fetching token failed.\n");
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GPR_ASSERT(num_md == 1);
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token = gpr_dump_slice(md_elems[0].value, GPR_DUMP_ASCII);
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printf("\nGot token: %s\n\n", token);
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gpr_mu_lock(GRPC_POLLSET_MU(&sync->pollset));
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grpc_pollset_kick(&sync->pollset);
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gpr_mu_unlock(GRPC_POLLSET_MU(&sync->pollset));
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int main(int argc, char **argv) {
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grpc_credentials *creds = NULL;
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char *service_url = "https://test.foo.google.com/Foo";
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gpr_cmdline *cl = gpr_cmdline_create("print_google_default_creds_token");
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gpr_cmdline_add_string(cl, "service_url",
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"Service URL for the token request.", &service_url);
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gpr_cmdline_parse(cl, argc, argv);
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creds = grpc_google_default_credentials_create();
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fprintf(stderr, "\nCould not find default credentials.\n\n");
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grpc_pollset_init(&sync.pollset);
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grpc_credentials_get_request_metadata(creds, &sync.pollset, service_url,
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on_metadata_response, &sync);
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gpr_mu_lock(GRPC_POLLSET_MU(&sync.pollset));
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while (!sync.is_done) grpc_pollset_work(&sync.pollset, gpr_inf_future);
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gpr_mu_unlock(GRPC_POLLSET_MU(&sync.pollset));
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grpc_credentials_release(creds);
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gpr_cmdline_destroy(cl);