Créer une connexion de socket à l'aide de Go
Restez organisé à l'aide des collections
Enregistrez et classez les contenus selon vos préférences.
Cet exemple de code montre comment ouvrir une connexion TCP à Cloud SQL pour PostgreSQL à l'aide du package database/sql de Go.
En savoir plus
Pour obtenir une documentation détaillée incluant cet exemple de code, consultez la page suivante :
Exemple de code
Sauf indication contraire, le contenu de cette page est régi par une licence Creative Commons Attribution 4.0, et les échantillons de code sont régis par une licence Apache 2.0. Pour en savoir plus, consultez les Règles du site Google Developers. Java est une marque déposée d'Oracle et/ou de ses sociétés affiliées.
[[["Facile à comprendre","easyToUnderstand","thumb-up"],["J'ai pu résoudre mon problème","solvedMyProblem","thumb-up"],["Autre","otherUp","thumb-up"]],[["Difficile à comprendre","hardToUnderstand","thumb-down"],["Informations ou exemple de code incorrects","incorrectInformationOrSampleCode","thumb-down"],["Il n'y a pas l'information/les exemples dont j'ai besoin","missingTheInformationSamplesINeed","thumb-down"],["Problème de traduction","translationIssue","thumb-down"],["Autre","otherDown","thumb-down"]],[],[],[],null,["# Create a TCP connection by using Go\n\nOpen a TCP 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 // connectTCPSocket initializes a TCP connection pool for a Cloud SQL\n // instance of Postgres.\n func connectTCPSocket() (*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_tcp.go: %s environment variable not set.\", 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\tdbTCPHost = mustGetenv(\"INSTANCE_HOST\") // e.g. '127.0.0.1' ('172.17.0.1' if deployed to GAE Flex)\n \t\tdbPort = mustGetenv(\"DB_PORT\") // e.g. '5432'\n \t\tdbName = mustGetenv(\"DB_NAME\") // e.g. 'my-database'\n \t)\n\n \tdbURI := fmt.Sprintf(\"host=%s user=%s password=%s port=%s database=%s\",\n \t\tdbTCPHost, dbUser, dbPwd, dbPort, dbName)\n\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)."]]