runtime: publish load-balanced http client#135
Merged
haasonsaas merged 3 commits intomainfrom Apr 20, 2026
Merged
Conversation
PR SummaryLow Risk Overview Introduces Reviewed by Cursor Bugbot for commit 149c846. Bugbot is set up for automated code reviews on this repo. Configure here. |
![cursor[bot]](https://avatars.githubusercontent.com/in/1210556?s=60&v=4){kind=small}
There was a problem hiding this comment.
Cursor Bugbot has reviewed your changes and found 1 potential issue.
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: Test calls t.Fatalf from HTTP handler goroutine
- Replaced the handler's goroutine-unsafe t.Fatalf call with t.Errorf so request validation still fails the test safely.
Preview (89aef70a0b)
diff --git a/go.mod b/go.mod
--- a/go.mod
+++ b/go.mod
@@ -28,6 +28,7 @@
require (
github.com/antithesishq/antithesis-sdk-go v0.6.0-default-no-op // indirect
github.com/beorn7/perks v1.0.1 // indirect
+ github.com/bufbuild/httplb v0.4.1 // indirect
github.com/cenkalti/backoff/v5 v5.0.3 // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
diff --git a/go.sum b/go.sum
--- a/go.sum
+++ b/go.sum
@@ -18,6 +18,8 @@
github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
+github.com/bufbuild/httplb v0.4.1 h1:f8dMp7tx2aJfMX2UcOId1A58QDiBag7Dv6BA1OtV/YA=
+github.com/bufbuild/httplb v0.4.1/go.mod h1:9XDjl/3UvlkOQUKthLlKn92C1/1SuZ3UCiekxZbenck=
github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
diff --git a/httpclient/httplb.go b/httpclient/httplb.go
new file mode 100644
--- /dev/null
+++ b/httpclient/httplb.go
@@ -1,0 +1,130 @@
+package httpclient
+
+import (
+ "crypto/tls"
+ "net/http"
+ "time"
+
+ "github.com/bufbuild/httplb"
+)
+
+const (
+ DefaultRequestTimeout = 30 * time.Second
+ DefaultIdleConnTimeout = 90 * time.Second
+ DefaultMaxIdleConns = 64
+ DefaultMaxIdleConnsPerHost = 16
+ DefaultMaxConnsPerHost = 32
+)
+
+// LoadBalancedOptions controls EvalOps' default outbound HTTP client.
+type LoadBalancedOptions struct {
+ RequestTimeout time.Duration
+ IdleConnTimeout time.Duration
+ MaxIdleConns int
+ MaxIdleConnsPerHost int
+ MaxConnsPerHost int
+ MaxResponseHeaderSize int
+ TLSClientConfig *tls.Config
+ TLSHandshakeTimeout time.Duration
+ DisableCompression bool
+}
+
+// LoadBalancedClient owns an httplb client and exposes its standard *http.Client.
+type LoadBalancedClient struct {
+ *http.Client
+
+ client *httplb.Client
+}
+
+var sharedDefaultClient = NewLoadBalanced(LoadBalancedOptions{})
+
+// DefaultClient returns a shared load-balanced client for nil-client fallbacks.
+func DefaultClient() *http.Client {
+ return sharedDefaultClient.Client
+}
+
+// NewLoadBalanced creates an HTTP client with DNS-backed client-side balancing.
+func NewLoadBalanced(options LoadBalancedOptions) *LoadBalancedClient {
+ options = options.withDefaults()
+ lbOptions := []httplb.ClientOption{
+ httplb.WithRequestTimeout(options.RequestTimeout),
+ httplb.WithIdleConnectionTimeout(options.IdleConnTimeout),
+ httplb.WithTransport("http", loadBalancedTransport{options: options}),
+ httplb.WithTransport("https", loadBalancedTransport{options: options}),
+ }
+ if options.TLSClientConfig != nil {
+ lbOptions = append(
+ lbOptions,
+ httplb.WithTLSConfig(options.TLSClientConfig, options.TLSHandshakeTimeout),
+ )
+ }
+ if options.MaxResponseHeaderSize > 0 {
+ lbOptions = append(lbOptions, httplb.WithMaxResponseHeaderBytes(options.MaxResponseHeaderSize))
+ }
+ if options.DisableCompression {
+ lbOptions = append(lbOptions, httplb.WithDisableCompression(true))
+ }
+
+ client := httplb.NewClient(lbOptions...)
+ return &LoadBalancedClient{
+ Client: client.Client,
+ client: client,
+ }
+}
+
+// Close releases resolver and transport resources owned by the httplb client.
+func (c *LoadBalancedClient) Close() error {
+ if c == nil || c.client == nil {
+ return nil
+ }
+ return c.client.Close()
+}
+
+func (o LoadBalancedOptions) withDefaults() LoadBalancedOptions {
+ if o.RequestTimeout <= 0 {
+ o.RequestTimeout = DefaultRequestTimeout
+ }
+ if o.IdleConnTimeout <= 0 {
+ o.IdleConnTimeout = DefaultIdleConnTimeout
+ }
+ if o.MaxIdleConns <= 0 {
+ o.MaxIdleConns = DefaultMaxIdleConns
+ }
+ if o.MaxIdleConnsPerHost <= 0 {
+ o.MaxIdleConnsPerHost = DefaultMaxIdleConnsPerHost
+ }
+ if o.MaxConnsPerHost <= 0 {
+ o.MaxConnsPerHost = DefaultMaxConnsPerHost
+ }
+ return o
+}
+
+type loadBalancedTransport struct {
+ options LoadBalancedOptions
+}
+
+func (t loadBalancedTransport) NewRoundTripper(
+ _ string,
+ _ string,
+ config httplb.TransportConfig,
+) httplb.RoundTripperResult {
+ transport := &http.Transport{
+ Proxy: config.ProxyFunc,
+ GetProxyConnectHeader: config.ProxyConnectHeadersFunc,
+ DialContext: config.DialFunc,
+ ForceAttemptHTTP2: true,
+ MaxIdleConns: t.options.MaxIdleConns,
+ MaxIdleConnsPerHost: t.options.MaxIdleConnsPerHost,
+ MaxConnsPerHost: t.options.MaxConnsPerHost,
+ IdleConnTimeout: config.IdleConnTimeout,
+ TLSHandshakeTimeout: config.TLSHandshakeTimeout,
+ TLSClientConfig: config.TLSClientConfig,
+ MaxResponseHeaderBytes: config.MaxResponseHeaderBytes,
+ ExpectContinueTimeout: time.Second,
+ DisableCompression: config.DisableCompression,
+ }
+ return httplb.RoundTripperResult{
+ RoundTripper: transport,
+ Close: transport.CloseIdleConnections,
+ }
+}
diff --git a/httpclient/httplb_test.go b/httpclient/httplb_test.go
new file mode 100644
--- /dev/null
+++ b/httpclient/httplb_test.go
@@ -1,0 +1,82 @@
+package httpclient
+
+import (
+ "fmt"
+ "net/http"
+ "net/http/httptest"
+ "testing"
+ "time"
+)
+
+func TestNewLoadBalancedUsesDefaults(t *testing.T) {
+ t.Parallel()
+
+ client := NewLoadBalanced(LoadBalancedOptions{})
+ t.Cleanup(func() {
+ if err := client.Close(); err != nil {
+ t.Fatalf("Close() error = %v", err)
+ }
+ })
+
+ if client.Client == nil {
+ t.Fatal("expected embedded http client")
+ }
+ if client.Transport == nil {
+ t.Fatal("expected httplb transport")
+ }
+ if client.Timeout != 0 {
+ t.Fatalf("Timeout = %s, want httplb request timeout only", client.Timeout)
+ }
+}
+
+func TestNewLoadBalancedHonorsCustomOptions(t *testing.T) {
+ t.Parallel()
+
+ client := NewLoadBalanced(LoadBalancedOptions{
+ RequestTimeout: 2 * time.Second,
+ IdleConnTimeout: time.Second,
+ MaxIdleConns: 8,
+ MaxIdleConnsPerHost: 4,
+ MaxConnsPerHost: 6,
+ })
+ t.Cleanup(func() {
+ if err := client.Close(); err != nil {
+ t.Fatalf("Close() error = %v", err)
+ }
+ })
+
+ if client.Timeout != 0 {
+ t.Fatalf("Timeout = %s, want httplb request timeout only", client.Timeout)
+ }
+}
+
+func TestLoadBalancedClientSendsRequests(t *testing.T) {
+ t.Parallel()
+
+ server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ if got := r.URL.Path; got != "/healthz" {
+ t.Errorf("path = %q, want /healthz", got)
+ }
+ _, _ = fmt.Fprint(w, "ok")
+ }))
+ defer server.Close()
+
+ client := NewLoadBalanced(LoadBalancedOptions{RequestTimeout: time.Second})
+ t.Cleanup(func() {
+ if err := client.Close(); err != nil {
+ t.Fatalf("Close() error = %v", err)
+ }
+ })
+
+ response, err := client.Get(server.URL + "/healthz")
+ if err != nil {
+ t.Fatalf("Get() error = %v", err)
+ }
+ defer func() {
+ _ = response.Body.Close()
+ }()
+
+ if response.StatusCode != http.StatusOK {
+ t.Fatalf("status = %d, want %d", response.StatusCode, http.StatusOK)
+ }
+}
diff --git a/vendor/github.com/bufbuild/httplb/.gitignore b/vendor/github.com/bufbuild/httplb/.gitignore
new file mode 100644
--- /dev/null
+++ b/vendor/github.com/bufbuild/httplb/.gitignore
@@ -1,0 +1,4 @@
+/.tmp/
+*.pprof
+*.svg
+cover.out
diff --git a/vendor/github.com/bufbuild/httplb/.golangci.yml b/vendor/github.com/bufbuild/httplb/.golangci.yml
new file mode 100644
--- /dev/null
+++ b/vendor/github.com/bufbuild/httplb/.golangci.yml
@@ -1,0 +1,81 @@
+linters-settings:
+ errcheck:
+ check-type-assertions: true
+ forbidigo:
+ forbid:
+ - '^fmt\.Print'
+ - '^log\.'
+ - '^print$'
+ - '^println$'
+ - '^panic$'
+ - '^clocktest\.'
+ - '^clockwork\.'
+ godox:
+ # TODO, OPT, etc. comments are fine to commit. Use FIXME comments for
+ # temporary hacks, and use godox to prevent committing them.
+ keywords: [FIXME, NOCOMMIT]
+ varnamelen:
+ ignore-decls:
+ - T any
+ - i int
+ - wg sync.WaitGroup
+ - ok bool
+ - w http.ResponseWriter
+ - r *http.Request
+linters:
+ enable-all: true
+ disable:
+ - cyclop # covered by gocyclo
+ - depguard # unnecessary for small libraries
+ - exhaustruct # not helpful, prevents idiomatic struct literals
+ - funlen # rely on code review to limit function length
+ - gocognit # dubious "cognitive overhead" quantification
+ - gofumpt # prefer standard gofmt
+ - goimports # rely on gci instead
+ - inamedparam # convention is not followed
+ - ireturn # "accept interfaces, return structs" isn't ironclad
+ - lll # don't want hard limits for line length
+ - maintidx # covered by gocyclo
+ - mnd # some unnamed constants are okay
+ - nlreturn # generous whitespace violates house style
+ - nonamedreturns # named returns are fine; it's *bare* returns that are bad
+ - tenv # deprecated in golangci v1.64.0
+ - testpackage # internal tests are fine
+ - wrapcheck # don't _always_ need to wrap errors
+ - wsl # generous whitespace violates house style
+issues:
+ exclude-dirs-use-default: false
+ exclude:
+ # Don't ban use of fmt.Errorf to create new errors, but the remaining
+ # checks from err113 are useful.
+ - "do not define dynamic errors.*"
+ # This gosec error is noisy with false positives.
+ - "G115: integer overflow conversion"
+ exclude-rules:
+ # Needlessly verbose inside of test-only code.
+ - path: (.+)_test\.go
+ linters:
+ - forcetypeassert
+ # Allow dot imports for testing.
+ - path: (.+)_test\.go
+ text: "^dot-imports: should not use dot imports"
+ linters:
+ - revive
+ # Allow clocktest within tests
+ - path: (.+)_test\.go
+ text: "^use of `clocktest\\."
+ linters:
+ - forbidigo
+ # Allow clockwork within clocktest
+ - path: internal/clocktest
+ text: "^use of `clockwork\\."
+ linters:
+ - forbidigo
+ - path: client_test\.go
+ linters:
+ # These tests examine goroutines to make sure all resources
+ # are cleaned up, which doesn't work when run in parallel.
+ - paralleltest
+ # For some reason, this linter is coming up with several
+ # false positives in this file ¯\_(ツ)_/¯
+ - bodyclose
diff --git a/vendor/github.com/bufbuild/httplb/LICENSE b/vendor/github.com/bufbuild/httplb/LICENSE
new file mode 100644
--- /dev/null
+++ b/vendor/github.com/bufbuild/httplb/LICENSE
@@ -1,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+ Copyright 2023-2025 Buf Technologies, Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
diff --git a/vendor/github.com/bufbuild/httplb/Makefile b/vendor/github.com/bufbuild/httplb/Makefile
new file mode 100644
--- /dev/null
+++ b/vendor/github.com/bufbuild/httplb/Makefile
@@ -1,0 +1,78 @@
+# See https://tech.davis-hansson.com/p/make/
+SHELL := bash
+.DELETE_ON_ERROR:
+.SHELLFLAGS := -eu -o pipefail -c
+.DEFAULT_GOAL := all
+MAKEFLAGS += --warn-undefined-variables
+MAKEFLAGS += --no-builtin-rules
+MAKEFLAGS += --no-print-directory
+BIN := .tmp/bin
+export PATH := $(BIN):$(PATH)
+export GOBIN := $(abspath $(BIN))
+COPYRIGHT_YEARS := 2023-2025
+LICENSE_IGNORE := --ignore /testdata/
+
+.PHONY: help
+help: ## Describe useful make targets
+ @grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "%-30s %s\n", $$1, $$2}'
+
+.PHONY: all
+all: ## Build, test, and lint (default)
+ $(MAKE) test
+ $(MAKE) lint
+
+.PHONY: clean
+clean: ## Delete intermediate build artifacts
+ @# -X only removes untracked files, -d recurses into directories, -f actually removes files/dirs
+ git clean -Xdf
+
+.PHONY: test
+test: build ## Run unit tests
+ go test -vet=off -race -cover ./...
+
+.PHONY: build
+build: generate ## Build all packages
+ go build ./...
+
+.PHONY: generate
+generate: $(BIN)/license-header ## Regenerate code and licenses
+ go mod tidy
+ license-header \
+ --license-type apache \
+ --copyright-holder "Buf Technologies, Inc." \
+ --year-range "$(COPYRIGHT_YEARS)" $(LICENSE_IGNORE)
+
+.PHONY: lint
+lint: $(BIN)/golangci-lint $(BIN)/checklocks ## Lint
+ go vet ./...
+ #go vet -vettool=$(BIN)/checklocks ./...
+ golangci-lint run
+
+.PHONY: lintfix
+lintfix: $(BIN)/golangci-lint ## Automatically fix some lint errors
+ golangci-lint run --fix
+
+.PHONY: install
+install: ## Install all binaries
+ go install ./...
+
+.PHONY: upgrade
+upgrade: ## Upgrade dependencies
+ go get -u -t ./... && go mod tidy -v
+
+.PHONY: checkgenerate
+checkgenerate:
+ @# Used in CI to verify that `make generate` doesn't produce a diff.
+ test -z "$$(git status --porcelain | tee /dev/stderr)"
+
+$(BIN)/license-header: Makefile
+ @mkdir -p $(@D)
+ go install github.com/bufbuild/buf/private/pkg/licenseheader/cmd/[email protected]
+
+$(BIN)/golangci-lint: Makefile
+ @mkdir -p $(@D)
+ go install github.com/golangci/golangci-lint/cmd/[email protected]
+
+$(BIN)/checklocks: Makefile
+ @mkdir -p $(@D)
+ go install gvisor.dev/gvisor/tools/checklocks/cmd/[email protected]
diff --git a/vendor/github.com/bufbuild/httplb/README.md b/vendor/github.com/bufbuild/httplb/README.md
new file mode 100644
--- /dev/null
+++ b/vendor/github.com/bufbuild/httplb/README.md
@@ -1,0 +1,100 @@
+# httplb
+
+[](https://github.com/bufbuild/httplb/actions/workflows/ci.yaml)
+[](https://goreportcard.com/report/github.com/bufbuild/httplb)
+[](https://pkg.go.dev/github.com/bufbuild/httplb)
+
+[`httplb`](https://pkg.go.dev/github.com/bufbuild/httplb)
+provides client-side load balancing for `net/http` clients. By default,
+clients are designed for server-to-server and RPC workloads:
+
+* They support HTTP/1.1, HTTP/2, and [H2C](https://en.wikipedia.org/wiki/HTTP/2#Encryption).
+* They periodically re-resolve names using DNS.
+* They use a round-robin load balancing policy.
+
+Random, fewest-pending, and power-of-two load balancing policies are also available.
+Clients with more complex needs can customize the underlying transports, name
+resolution, and load balancing. They can also add subsetting and active health
+checking.
+
+`httplb` takes care to build all this functionality underneath the standard library's
+`*http.Client`, so `httplb` is usable anywhere you're currently using `net/http`.
+
+## Example
+
+Here's a quick example of how to get started with `httplb`:
+
+```go
+package main
+
+import (
+ "log"
+ "net"
+ "time"
+
+ "github.com/bufbuild/httplb"
+ "github.com/bufbuild/httplb/picker"
+)
+
+func main() {
+ client := httplb.NewClient(
+ // Switch from the default round-robin policy to power-of-two.
+ httplb.WithPicker(picker.NewPowerOfTwo),
+ )
+ defer client.Close()
+ resp, err := client.Get("https://example.com")
+ if err != nil {
+ log.Fatalln(err)
+ }
+ defer resp.Body.Close()
+ log.Println(resp.Status)
+}
+```
+
+If you're using [Connect](https://github.com/connectrpc/connect-go), you can
+use `httplb` for your RPC clients:
+
+```go
+func main() {
+ client := httplb.NewClient()
+ defer client.Close()
+ pingClient := pingv1connect.NewPingServiceClient(
+ client,
+ "http://localhost:8080/",
+ )
+ req := connect.NewRequest(&pingv1.PingRequest{
+ Number: 42,
+ })
+ res, err := pingClient.Ping(context.Background(), req)
+ if err != nil {
+ log.Fatalln(err)
+ }
+ log.Println(res.Msg)
+}
+```
+
+If you know the server supports HTTP/2 without TLS (HTTP/2 over cleartext, or H2C for short), use
+the `h2c` scheme in your URLs instead of `http`:
+
+```go
+ pingClient := pingv1connect.NewPingServiceClient(
+ client,
+ "h2c://localhost:8080/",
+ )
+```
+
+For more information on how to use `httplb`, especially for advanced use cases, take
+a look at the [full documentation](https://pkg.go.dev/github.com/bufbuild/httplb).
+
+## Ecosystem
+
+* [connect-go](https://github.com/bufbuild/connect-go): RPC library, compatible with `httplb`.
+
+## Status: Alpha
+
+This project is currently in **alpha**. The API should be considered unstable and likely to change.
+
+## Legal
+
+Offered under the [Apache 2 license](LICENSE).
+
diff --git a/vendor/github.com/bufbuild/httplb/attribute/attribute.go b/vendor/github.com/bufbuild/httplb/attribute/attribute.go
new file mode 100644
--- /dev/null
+++ b/vendor/github.com/bufbuild/httplb/attribute/attribute.go
@@ -1,0 +1,112 @@
+// Copyright 2023-2025 Buf Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package attribute provides a type-safe container of custom attributes
+// named Values. This can be used to add custom metadata to a resolved
+// address. Custom attributes are declared using [NewKey] to create a
+// strongly-typed key. The values can then be defined using the key's
+// Value method.
+//
+// The following example declares two custom attributes, a floating point
+// "weight", and a string "geographic region". It then constructs a new
+// resolved Address that has values for each of them.
+//
+// var (
+// Weight = attribute.NewKey[float64]()
+// GeographicRegion = attribute.NewKey[string]()
+//
+// Address = resolver.Address{
+// HostPort: "111.222.123.234:5432",
+// Attributes: attribute.NewValues(
+// Weight.Value(1.25),
+// GeographicRegion.Value("us-east1"),
+// ),
+// }
+// )
+//
+// Custom [Resolver] implementations can attach any kind of metadata
+// to an address this way. This can be combined with a [custom picker]
+// that uses the metadata, which can access the properties in a type-safe way
+// using the [GetValue] function.
+//
+// Such metadata can be used to implement regional affinity or to implement
+// a weighted round-robin or random selection strategy (where a weight could
+// be used to send more traffic to an address that has more available
+// resources, such as more compute, memory, or network bandwidth).
+//
+// [Resolver]: https://pkg.go.dev/github.com/bufbuild/httplb/resolver#Resolver
+// [custom picker]: https://pkg.go.dev/github.com/bufbuild/httplb/picker#Picker
+package attribute
+
+// Values is a collection of type-safe custom metadata values.
... diff truncated: showing 800 of 5225 linesYou can send follow-ups to the cloud agent here.
Reviewed by Cursor Bugbot for commit 8f8cd48. Configure here.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
httpclientruntime package used by platform agent-mcpgithub.com/bufbuild/httplbso the repo builds with its existing vendor modeTest plan
go test ./httpclientgo test ./...git diff --check