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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThis webpage documents different versions of the \u003ccode\u003eAuthorityOption\u003c/code\u003e for the Google Cloud C++ client library, spanning from version 2.10.1 to 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eAuthorityOption\u003c/code\u003e configures the "authority" attribute for gRPC requests, mapping to the \u003ccode\u003eauthority()\u003c/code\u003e field in \u003ccode\u003egrpc::ClientContext\u003c/code\u003e and sets the \u003ccode\u003e:authority\u003c/code\u003e pseudo-header in HTTP/2 requests.\u003c/p\u003e\n"],["\u003cp\u003eFor REST services, the \u003ccode\u003eAuthorityOption\u003c/code\u003e sets the \u003ccode\u003eHost\u003c/code\u003e header in HTTP/1.1 or HTTP/1.0 requests.\u003c/p\u003e\n"],["\u003cp\u003eSetting the \u003ccode\u003eAuthorityOption\u003c/code\u003e to an empty string will result in no headers being set, useful for environments outside of the Google production environment.\u003c/p\u003e\n"],["\u003cp\u003eThe type of \u003ccode\u003eAuthorityOption\u003c/code\u003e is an alias of \u003ccode\u003estd::string\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
