Creazione di una connessione socket quando si utilizza Go
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Apri una connessione socket Unix a Cloud SQL per PostgreSQL utilizzando il pacchetto database/sql di Go.
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Per la documentazione dettagliata che include questo esempio di codice, vedi quanto segue:
Esempio di codice
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[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],[],[],[],null,["# Create a socket connection when using Go\n\nOpen a Unix socket connection to Cloud SQL for PostgreSQL by using Go's database/sql package.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Connect from App Engine flexible environment](/sql/docs/postgres/connect-app-engine-flexible)\n- [Connect from App Engine standard environment](/sql/docs/postgres/connect-app-engine-standard)\n- [Connect from Cloud Build](/sql/docs/postgres/connect-build)\n- [Connect from Cloud Run](/sql/docs/postgres/connect-run)\n- [Connect from Cloud Run functions](/sql/docs/postgres/connect-functions)\n- [Connect using the Cloud SQL Auth Proxy](/sql/docs/postgres/connect-auth-proxy)\n- [Manage database connections](/sql/docs/postgres/manage-connections)\n\nCode sample\n-----------\n\n### Go\n\n\nTo authenticate to Cloud SQL for PostgreSQL, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n package cloudsql\n\n import (\n \t\"database/sql\"\n \t\"fmt\"\n \t\"log\"\n \t\"os\"\n\n \t// Note: If connecting using the App Engine Flex Go runtime, use\n \t// \"github.com/jackc/pgx/stdlib\" instead, since v5 requires\n \t// Go modules which are not supported by App Engine Flex.\n \t_ \"github.com/jackc/pgx/v5/stdlib\"\n )\n\n // connectUnixSocket initializes a Unix socket connection pool for\n // a Cloud SQL instance of Postgres.\n func connectUnixSocket() (*sql.DB, error) {\n \tmustGetenv := func(k string) string {\n \t\tv := os.Getenv(k)\n \t\tif v == \"\" {\n \t\t\tlog.Fatalf(\"Fatal Error in connect_unix.go: %s environment variable not set.\\n\", k)\n \t\t}\n \t\treturn v\n \t}\n \t// Note: Saving credentials in environment variables is convenient, but not\n \t// secure - consider a more secure solution such as\n \t// Cloud Secret Manager (https://cloud.google.com/secret-manager) to help\n \t// keep secrets safe.\n \tvar (\n \t\tdbUser = mustGetenv(\"DB_USER\") // e.g. 'my-db-user'\n \t\tdbPwd = mustGetenv(\"DB_PASS\") // e.g. 'my-db-password'\n \t\tunixSocketPath = mustGetenv(\"INSTANCE_UNIX_SOCKET\") // e.g. '/cloudsql/project:region:instance'\n \t\tdbName = mustGetenv(\"DB_NAME\") // e.g. 'my-database'\n \t)\n\n \tdbURI := fmt.Sprintf(\"user=%s password=%s database=%s host=%s\",\n \t\tdbUser, dbPwd, dbName, unixSocketPath)\n\n \t// dbPool is the pool of database connections.\n \tdbPool, err := sql.Open(\"pgx\", dbURI)\n \tif err != nil {\n \t\treturn nil, fmt.Errorf(\"sql.Open: %w\", err)\n \t}\n\n \t// ...\n\n \treturn dbPool, nil\n }\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=cloud_sql_postgres)."]]