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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 other versions, such as 2.36.0, 2.35.0, and so on, all the way down to 2.10.1, each offering documentation for the \u003ccode\u003egoogle::cloud::AuthorityOption\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThis page details the configuration of the "authority" attribute, which corresponds to the \u003ccode\u003eauthority()\u003c/code\u003e field in \u003ccode\u003egrpc::ClientContext\u003c/code\u003e for gRPC requests, setting the :authority pseudo-header in HTTP/2 requests.\u003c/p\u003e\n"],["\u003cp\u003eFor REST-based services using HTTP/1.1 or HTTP/1.0, the "authority" attribute is configured as the \u003ccode\u003eHost\u003c/code\u003e header.\u003c/p\u003e\n"],["\u003cp\u003eSetting the \u003ccode\u003eAuthorityOption\u003c/code\u003e to an empty string will not set any headers, which may be useful when not using Google's production environment.\u003c/p\u003e\n"]]],[],null,[]]
