Initial commit

Author: landrade

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Leonardo Andrade
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,66 @@
+# Cache control plugin for GQLGEN
+
+### Installation
+
+Install Go module:
+
+```bash
+$ go get github.com/landrade/gqlgen-cache-control-plugin
+```
+
+### Configuring the plugin
+
+```go
+package main
+import (
+	"github.com/landrade/gqlgen-cache-control-plugin/cache"
+	"github.com/99designs/gqlgen/graphql/handler"
+)
+func main() {
+	// Building your server
+	cfg := generated.Config{Resolvers: &graph.Resolver{}}
+	srv := handler.NewDefaultServer(generated.NewExecutableSchema(cfg))
+	// Enable cache extensions
+	srv.Use(cache.Extension{}) // <----
+	//...
+}
+```
+
+### Set cache hints
+
+After you enable `cache.Extension`, you can set cache hints using `cache.SetHint` function in your resolvers.
+
+```go
+import (
+	"github.com/landrade/gqlgen-cache-control-plugin/cache"
+	// ...
+)
+func (r *commentResolver) Post(ctx context.Context, obj *model.Comment) (*model.Post, error) {
+    post, err := // getting post by comment
+    if err != nil {
+        return nil, err
+	}
+	// Set a CacheHint
+	cache.SetHint(ctx, cache.ScopePublic, 10*time.Second)
+	return post, nil
+}
+```
+
+### CDN Caching
+
+It's possible to enable the Gqlgen to provide a `Cache-Control` header based on your cache hints in `GET` or `POST` requests.
+To do it you need wrap your server using `cache.Middleware` function. It will add `Cache-Control` header to all responses.
+
+````go
+
+```go
+func main() {
+	// ... setup server
+	srv = cache.Middleware(srv)
+	// ... do more things
+}
+````
+
+Doing it, Gqlgen write the lowest max-age defined in cacheControl extensions.
+
+For more informations, see `_example` folder.

_example/go.mod

@@ -0,0 +1,31 @@
+module github.com/landrade/gqlgen-cache-control-plugin/_example
+
+go 1.18
+
+replace github.com/landrade/gqlgen-cache-control-plugin => ../
+
+require (
+	github.com/99designs/gqlgen v0.17.5
+	github.com/landrade/gqlgen-cache-control-plugin v1.0.0
+	github.com/stretchr/testify v1.7.1
+	github.com/vektah/gqlparser/v2 v2.4.2
+)
+
+require (
+	github.com/agnivade/levenshtein v1.1.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
+	github.com/matryer/moq v0.2.7 // indirect
+	github.com/mitchellh/mapstructure v1.3.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/urfave/cli/v2 v2.4.0 // indirect
+	golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3 // indirect
+	golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 // indirect
+	golang.org/x/tools v0.1.10 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+)

_example/go.sum

@@ -0,0 +1,99 @@
+github.com/99designs/gqlgen v0.17.5 h1:bTgv7FQz3+NROg6ooHtlkaJ82Uqrp6e5sAziXTBo1hc=
+github.com/99designs/gqlgen v0.17.5/go.mod h1:SNpLVzaF37rRLSAXtu8FKVp5I4zycneMmFX6NT4XGSU=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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_example/gqlgen.yml

@@ -0,0 +1,56 @@
+# Where are all the schema files located? globs are supported eg  src/**/*.graphqls
+schema:
+  - graph/*.graphqls
+
+# Where should the generated server code go?
+exec:
+  filename: graph/generated/generated.go
+  package: generated
+
+# Uncomment to enable federation
+# federation:
+#   filename: graph/generated/federation.go
+#   package: generated
+
+# Where should any generated models go?
+model:
+  filename: graph/model/models_gen.go
+  package: model
+
+# Where should the resolver implementations go?
+resolver:
+  layout: follow-schema
+  dir: graph
+  package: graph
+
+# Optional: turn on use ` + "`" + `gqlgen:"fieldName"` + "`" + ` tags in your models
+# struct_tag: json
+
+# Optional: turn on to use []Thing instead of []*Thing
+# omit_slice_element_pointers: false
+
+# Optional: set to speed up generation time by not performing a final validation pass.
+# skip_validation: true
+
+# gqlgen will search for any type names in the schema in these go packages
+# if they match it will use them, otherwise it will generate them.
+autobind:
+#  - "_example/graph/model"
+
+# This section declares type mapping between the GraphQL and go type systems
+#
+# The first line in each type will be used as defaults for resolver arguments and
+# modelgen, the others will be allowed when binding to fields. Configure them to
+# your liking
+models:
+  ID:
+    model:
+      - github.com/99designs/gqlgen/graphql.ID
+      - github.com/99designs/gqlgen/graphql.Int
+      - github.com/99designs/gqlgen/graphql.Int64
+      - github.com/99designs/gqlgen/graphql.Int32
+  Int:
+    model:
+      - github.com/99designs/gqlgen/graphql.Int
+      - github.com/99designs/gqlgen/graphql.Int64
+      - github.com/99designs/gqlgen/graphql.Int32