static void plugin_md_request_metadata_ready(void *request,
const grpc_metadata *md,
size_t num_md,
grpc_status_code status,
const char *error_details) {
/* called from application code */
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INITIALIZER(
GRPC_EXEC_CTX_FLAG_IS_FINISHED | GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP,
NULL, NULL);
grpc_metadata_plugin_request *r = (grpc_metadata_plugin_request *)request;
if (status != GRPC_STATUS_OK) {
if (error_details != NULL) {
gpr_log(GPR_ERROR, "Getting metadata from plugin failed with error: %s",
error_details);
}
r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_ERROR,
error_details);
} else {
size_t i;
bool seen_illegal_header = false;
grpc_credentials_md *md_array = NULL;
for (i = 0; i < num_md; i++) {
if (!GRPC_LOG_IF_ERROR("validate_metadata_from_plugin",
grpc_validate_header_key_is_legal(md[i].key))) {
seen_illegal_header = true;
break;
} else if (!grpc_is_binary_header(md[i].key) &&
!GRPC_LOG_IF_ERROR(
"validate_metadata_from_plugin",
grpc_validate_header_nonbin_value_is_legal(md[i].value))) {
gpr_log(GPR_ERROR, "Plugin added invalid metadata value.");
seen_illegal_header = true;
break;
}
}
if (seen_illegal_header) {
r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_ERROR,
"Illegal metadata");
} else if (num_md > 0) {
md_array = gpr_malloc(num_md * sizeof(grpc_credentials_md));
for (i = 0; i < num_md; i++) {
md_array[i].key = grpc_slice_ref_internal(md[i].key);
md_array[i].value = grpc_slice_ref_internal(md[i].value);
}
r->cb(&exec_ctx, r->user_data, md_array, num_md, GRPC_CREDENTIALS_OK,
NULL);
for (i = 0; i < num_md; i++) {
grpc_slice_unref_internal(&exec_ctx, md_array[i].key);
grpc_slice_unref_internal(&exec_ctx, md_array[i].value);
}
gpr_free(md_array);
} else if (num_md == 0) {
r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_OK, NULL);
}
}
gpr_free(r);
grpc_exec_ctx_finish(&exec_ctx);
}
int grpc_header_nonbin_value_is_legal(grpc_slice slice) {
return error2int(grpc_validate_header_nonbin_value_is_legal(slice));
}
