For REST-based services using HTTP/1.1 or HTTP/1.0 this is the Host header.
Setting this option to the empty string has no effect, i.e., no headers are set. This can be useful if you are not using Google's production environment.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe latest version available is 2.37.0-rc, with numerous older versions listed back to 2.10.1.\u003c/p\u003e\n"],["\u003cp\u003eThis document provides a list of versions for \u003ccode\u003estruct google::cloud::AuthorityOption\u003c/code\u003e, detailing the available versions for reference.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eAuthorityOption\u003c/code\u003e configures the authority attribute, which is the \u003ccode\u003eauthority()\u003c/code\u003e field in \u003ccode\u003egrpc::ClientContext\u003c/code\u003e for gRPC requests and the \u003ccode\u003eHost\u003c/code\u003e header for HTTP/1.1 or HTTP/1.0 REST-based services.\u003c/p\u003e\n"],["\u003cp\u003eSetting the \u003ccode\u003eAuthorityOption\u003c/code\u003e to an empty string will result in no headers being set, which is useful outside of Google's production environment.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003estd::string\u003c/code\u003e is the type alias for this \u003ccode\u003eAuthorityOption\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
