Initial checkin of gRPC to third_party/

third_party/grpc/test/core/security/print_google_default_creds_token.c

Index: third_party/grpc/test/core/security/print_google_default_creds_token.c
diff --git a/third_party/grpc/test/core/security/print_google_default_creds_token.c b/third_party/grpc/test/core/security/print_google_default_creds_token.c
new file mode 100644
index 0000000000000000000000000000000000000000..09673f362cfcc87bfba608688ae052c7517af734
--- /dev/null
+++ b/third_party/grpc/test/core/security/print_google_default_creds_token.c
@@ -0,0 +1,125 @@
+/*
+ *
+ * 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 <stdio.h>
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/sync.h>
+
+#include "src/core/security/credentials.h"
+#include "src/core/support/string.h"
+
+typedef struct {
+  gpr_mu *mu;
+  grpc_pollset *pollset;
+  int is_done;
+} synchronizer;
+
+static void on_metadata_response(grpc_exec_ctx *exec_ctx, void *user_data,
+                                 grpc_credentials_md *md_elems, size_t num_md,
+                                 grpc_credentials_status status) {
+  synchronizer *sync = user_data;
+  if (status == GRPC_CREDENTIALS_ERROR) {
+    fprintf(stderr, "Fetching token failed.\n");
+  } else {
+    char *token;
+    GPR_ASSERT(num_md == 1);
+    token = gpr_dump_slice(md_elems[0].value, GPR_DUMP_ASCII);
+    printf("\nGot token: %s\n\n", token);
+    gpr_free(token);
+  }
+  gpr_mu_lock(sync->mu);
+  sync->is_done = 1;
+  grpc_pollset_kick(sync->pollset, NULL);
+  gpr_mu_unlock(sync->mu);
+}
+
+int main(int argc, char **argv) {
+  int result = 0;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  synchronizer sync;
+  grpc_channel_credentials *creds = NULL;
+  char *service_url = "https://test.foo.google.com/Foo";
+  grpc_auth_metadata_context context;
+  gpr_cmdline *cl = gpr_cmdline_create("print_google_default_creds_token");
+  gpr_cmdline_add_string(cl, "service_url",
+                         "Service URL for the token request.", &service_url);
+  gpr_cmdline_parse(cl, argc, argv);
+  memset(&context, 0, sizeof(context));
+  context.service_url = service_url;
+
+  grpc_init();
+
+  creds = grpc_google_default_credentials_create();
+  if (creds == NULL) {
+    fprintf(stderr, "\nCould not find default credentials.\n\n");
+    result = 1;
+    goto end;
+  }
+
+  sync.pollset = gpr_malloc(grpc_pollset_size());
+  grpc_pollset_init(sync.pollset, &sync.mu);
+  sync.is_done = 0;
+
+  grpc_call_credentials_get_request_metadata(
+      &exec_ctx, ((grpc_composite_channel_credentials *)creds)->call_creds,
+      sync.pollset, context, on_metadata_response, &sync);
+
+  gpr_mu_lock(sync.mu);
+  while (!sync.is_done) {
+    grpc_pollset_worker *worker = NULL;
+    grpc_pollset_work(&exec_ctx, sync.pollset, &worker,
+                      gpr_now(GPR_CLOCK_MONOTONIC),
+                      gpr_inf_future(GPR_CLOCK_MONOTONIC));
+    gpr_mu_unlock(sync.mu);
+    grpc_exec_ctx_flush(&exec_ctx);
+    gpr_mu_lock(sync.mu);
+  }
+  gpr_mu_unlock(sync.mu);
+
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  grpc_channel_credentials_release(creds);
+  gpr_free(sync.pollset);
+
+end:
+  gpr_cmdline_destroy(cl);
+  grpc_shutdown();
+  return result;
+}