A factory function to construct an object of type ProjectsConnection that uses REST over HTTP as transport in lieu of gRPC.
REST transport should only be used for services that do not support gRPC or if the existing network configuration precludes using gRPC.
The returned connection object should not be used directly; instead it should be passed as an argument to the constructor of ProjectsClient.
The optional options argument may be used to configure aspects of the returned ProjectsConnection. Expected options are any of the types in the following option lists:
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[[["\u003cp\u003eThis webpage provides documentation for the Google Cloud Compute Projects API, specifically for C++ version 2.28.0.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate version available is 2.37.0-rc, while the page lists all versions from 2.15.1 to 2.36.0.\u003c/p\u003e\n"],["\u003cp\u003eIt details classes like \u003ccode\u003eProjectsClient\u003c/code\u003e, \u003ccode\u003eProjectsConnection\u003c/code\u003e, and various retry and policy classes, along with associated structs, all related to the projects resource.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation includes a function to create a \u003ccode\u003eProjectsConnection\u003c/code\u003e object that uses REST over HTTP, along with options for configuration.\u003c/p\u003e\n"],["\u003cp\u003eThis page also contains the function \u003ccode\u003eMakeDefaultProjectsConnectionIdempotencyPolicy\u003c/code\u003e along with information on its return type.\u003c/p\u003e\n"]]],[],null,["# Namespace google::cloud::compute_projects_v1 (2.28.0)\n\nVersion 2.28.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/compute/latest/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.41.0](/cpp/docs/reference/compute/2.41.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.40.0](/cpp/docs/reference/compute/2.40.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.39.0](/cpp/docs/reference/compute/2.39.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.38.0](/cpp/docs/reference/compute/2.38.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.37.0](/cpp/docs/reference/compute/2.37.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.36.0](/cpp/docs/reference/compute/2.36.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.35.0](/cpp/docs/reference/compute/2.35.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.34.0](/cpp/docs/reference/compute/2.34.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.33.0](/cpp/docs/reference/compute/2.33.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.32.0](/cpp/docs/reference/compute/2.32.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.31.0](/cpp/docs/reference/compute/2.31.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.30.0](/cpp/docs/reference/compute/2.30.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.29.0](/cpp/docs/reference/compute/2.29.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.28.0](/cpp/docs/reference/compute/2.28.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.27.0](/cpp/docs/reference/compute/2.27.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.26.0](/cpp/docs/reference/compute/2.26.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.25.1](/cpp/docs/reference/compute/2.25.1/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.24.0](/cpp/docs/reference/compute/2.24.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.23.0](/cpp/docs/reference/compute/2.23.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.22.1](/cpp/docs/reference/compute/2.22.1/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.21.0](/cpp/docs/reference/compute/2.21.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.20.0](/cpp/docs/reference/compute/2.20.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.19.0](/cpp/docs/reference/compute/2.19.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.18.0](/cpp/docs/reference/compute/2.18.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.17.0](/cpp/docs/reference/compute/2.17.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.16.0](/cpp/docs/reference/compute/2.16.0/namespacegoogle_1_1cloud_1_1compute__projects__v1)\n- [2.15.1](/cpp/docs/reference/compute/2.15.1/namespacegoogle_1_1cloud_1_1compute__projects__v1) \n\nClasses\n-------\n\n### [ProjectsClient](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsClient)\n\nService for the projects resource.\n\n### [ProjectsConnection](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection)\n\nThe [`ProjectsConnection`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection) object for [`ProjectsClient`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsClient).\n\n### [ProjectsConnectionIdempotencyPolicy](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnectionIdempotencyPolicy)\n\n### [ProjectsLimitedErrorCountRetryPolicy](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsLimitedErrorCountRetryPolicy)\n\nA retry policy for [`ProjectsConnection`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection) based on counting errors.\n\n### [ProjectsLimitedTimeRetryPolicy](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsLimitedTimeRetryPolicy)\n\nA retry policy for [`ProjectsConnection`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection) based on elapsed time.\n\n### [ProjectsRetryPolicy](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsRetryPolicy)\n\nThe retry policy for [`ProjectsConnection`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection).\n\nStructs\n-------\n\n### [ProjectsBackoffPolicyOption](/cpp/docs/reference/compute/2.28.0/structgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsBackoffPolicyOption)\n\nUse with [`google::cloud::Options`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Options.html) to configure the backoff policy.\n\n### [ProjectsConnectionIdempotencyPolicyOption](/cpp/docs/reference/compute/2.28.0/structgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnectionIdempotencyPolicyOption)\n\nUse with [`google::cloud::Options`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Options.html) to configure which operations are retried.\n\n### [ProjectsPollingPolicyOption](/cpp/docs/reference/compute/2.28.0/structgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsPollingPolicyOption)\n\nUse with [`google::cloud::Options`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Options.html) to configure the long-running operations polling policy.\n\n### [ProjectsRetryPolicyOption](/cpp/docs/reference/compute/2.28.0/structgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsRetryPolicyOption)\n\nUse with [`google::cloud::Options`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Options.html) to configure the retry policy.\n\nFunctions\n---------\n\n### MakeDefaultProjectsConnectionIdempotencyPolicy()\n\n### MakeProjectsConnectionRest(Options)\n\nA factory function to construct an object of type [`ProjectsConnection`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection) that uses REST over HTTP as transport in lieu of gRPC. \nREST transport should only be used for services that do not support gRPC or if the existing network configuration precludes using gRPC.\n\nThe returned connection object should not be used directly; instead it should be passed as an argument to the constructor of [ProjectsClient](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsClient).\n\nThe optional `options` argument may be used to configure aspects of the returned [`ProjectsConnection`](/cpp/docs/reference/compute/2.28.0/classgoogle_1_1cloud_1_1compute__projects__v1_1_1ProjectsConnection). Expected options are any of the types in the following option lists:\n\n- [`google::cloud::CommonOptionList`](https://cloud.google.com/cpp/docs/reference/common/latest/namespacegoogle_1_1cloud.html)\n- [`google::cloud::RestOptionList`](https://cloud.google.com/cpp/docs/reference/common/latest/namespacegoogle_1_1cloud.html)\n- [`google::cloud::UnifiedCredentialsOptionList`](https://cloud.google.com/cpp/docs/reference/common/latest/namespacegoogle_1_1cloud.html)\n- [`google::cloud::compute_projects_v1::ProjectsPolicyOptionList`](about:invalid#zCSafez)\n\n| **Note:** Unexpected options will be ignored. To log unexpected options instead, set `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` in the environment."]]
