feat: add option to set the cache-control header

config/dev.yml

@@ -45,6 +45,13 @@ cors_allowed_origins: ["*"]
 # Debug Cross Origin Resource Sharing requests
 cors_debug: true
 
+# Default API path prefix is /api you can change it if you like
+# api_path: "/data"
+
+# Cache-Control header can help cache queries if your CDN supports cache-control 
+# on POST requests (does not work with not mutations) 
+# cache_control: "public, max-age=300, s-maxage=600"
+
 # Postgres related environment Variables
 # SG_DATABASE_HOST
 # SG_DATABASE_PORT

core/core.go

@@ -14,6 +14,11 @@ import (
 	"github.com/valyala/fasttemplate"
 )
 
+const (
+	OpQuery int = iota
+	OpMutation
+)
+
 type extensions struct {
 	Tracing *trace `json:"tracing,omitempty"`
 }
@@ -329,7 +334,20 @@ func (c *scontext) executeRoleQuery(tx *sql.Tx) (string, error) {
 	return role, nil
 }
 
-func (r *Result) Operation() string {
+func (r *Result) Operation() int {
+	switch r.op {
+	case qcode.QTQuery:
+		return OpQuery
+
+	case qcode.QTMutation, qcode.QTInsert, qcode.QTUpdate, qcode.QTUpsert, qcode.QTDelete:
+		return OpMutation
+
+	default:
+		return -1
+	}
+}
+
+func (r *Result) OperationName() string {
 	return r.op.String()
 }
 

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/daaku/go.zipexe v1.0.1 // indirect
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/dlclark/regexp2 v1.2.0 // indirect
-	github.com/dop251/goja v0.0.0-20200414142002-77e84ffb8c65
+	github.com/dop251/goja v0.0.0-20200424152103-d0b8fda54cd0
 	github.com/fsnotify/fsnotify v1.4.9
 	github.com/garyburd/redigo v1.6.0
 	github.com/go-sourcemap/sourcemap v2.1.3+incompatible // indirect

go.sum

@@ -55,8 +55,8 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZm
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/dlclark/regexp2 v1.2.0 h1:8sAhBGEM0dRWogWqWyQeIJnxjWO6oIjl8FKqREDsGfk=
 github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
-github.com/dop251/goja v0.0.0-20200414142002-77e84ffb8c65 h1:Nud597JuGCF/MScrb6NNVDRgmuk8X7w3pFc5GvSsm5E=
+github.com/dop251/goja v0.0.0-20200424152103-d0b8fda54cd0 h1:EfFAcaAwGai/wlDCWwIObHBm3T2C2CCPX/SaS0fpOJ4=
-github.com/dop251/goja v0.0.0-20200414142002-77e84ffb8c65/go.mod h1:Mw6PkjjMXWbTj+nnj4s3QPXq1jaT0s5pC0iFD4+BOAA=
+github.com/dop251/goja v0.0.0-20200424152103-d0b8fda54cd0/go.mod h1:Mw6PkjjMXWbTj+nnj4s3QPXq1jaT0s5pC0iFD4+BOAA=
 github.com/friendsofgo/graphiql v0.2.2/go.mod h1:8Y2kZ36AoTGWs78+VRpvATyt3LJBx0SZXmay80ZTRWo=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=

internal/serv/api.go

@@ -46,6 +46,7 @@ type Serv struct {
 	AllowedOrigins []string `mapstructure:"cors_allowed_origins"`
 	DebugCORS      bool     `mapstructure:"cors_debug"`
 	APIPath        string   `mapstructure:"api_path"`
+	CacheControl   string   `mapstructure:"cache_control"`
 
 	Auth  auth.Auth
 	Auths []auth.Auth

internal/serv/http.go

@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"net/http"
 
+	"github.com/dosco/super-graph/core"
 	"github.com/dosco/super-graph/internal/serv/internal/auth"
 	"github.com/rs/cors"
 	"go.uber.org/zap"
@@ -84,15 +85,19 @@ func apiV1(w http.ResponseWriter, r *http.Request) {
 		log.Printf("DBG query %s: %s", res.QueryName(), res.SQL())
 	}
 
-	if err != nil {
+	if err == nil {
-		renderErr(w, err)
+		if len(conf.CacheControl) != 0 && res.Operation() == core.OpQuery {
-	} else {
+			w.Header().Set("Cache-Control", conf.CacheControl)
+		}
 		json.NewEncoder(w).Encode(res)
+
+	} else {
+		renderErr(w, err)
 	}
 
 	if doLog && logLevel >= LogLevelInfo {
 		zlog.Info("success",
-			zap.String("op", res.Operation()),
+			zap.String("op", res.OperationName()),
 			zap.String("name", res.QueryName()),
 			zap.String("role", res.Role()),
 		)

internal/serv/tmpl/dev.yml

@@ -46,6 +46,13 @@ cors_allowed_origins: ["*"]
 # Debug Cross Origin Resource Sharing requests
 cors_debug: false
 
+# Default API path prefix is /api you can change it if you like
+# api_path: "/data"
+
+# Cache-Control header can help cache queries if your CDN supports cache-control 
+# on POST requests (does not work with not mutations) 
+# cache_control: "public, max-age=300, s-maxage=600"
+
 # Postgres related environment Variables
 # SG_DATABASE_HOST
 # SG_DATABASE_PORT

internal/serv/tmpl/prod.yml

@@ -49,6 +49,13 @@ reload_on_config_change: false
 # Debug Cross Origin Resource Sharing requests
 # cors_debug: false
 
+# Default API path prefix is /api you can change it if you like
+# api_path: "/data"
+
+# Cache-Control header can help cache queries if your CDN supports cache-control 
+# on POST requests (does not work with not mutations) 
+# cache_control: "public, max-age=300, s-maxage=600"
+
 # Postgres related environment Variables
 # SG_DATABASE_HOST
 # SG_DATABASE_PORT