support parsing request body

README.md

@@ -229,3 +229,4 @@ Logo is created by [Mahmoud Sayed](https://www.facebook.com/mahmoudsayedae) and
 
 #### Third-party library licenses
 - [FastHTTP](https://github.com/valyala/fasthttp/blob/master/LICENSE)
+- [json-iterator](https://github.com/json-iterator/go/blob/master/LICENSE)

context.go

@@ -1,20 +1,32 @@
 package gearbox
 
 import (
+	"fmt"
+	"strings"
+
+	jsoniter "github.com/json-iterator/go"
 	"github.com/valyala/fasthttp"
 )
 
+// MIME types
+const (
+	MIMEApplicationJSON = "application/json"
+)
+
 // Context interface
 type Context interface {
 	Next()
 	Context() *fasthttp.RequestCtx
 	Param(key string) string
 	Query(key string) string
+	SendBytes(value []byte) Context
 	SendString(value string) Context
+	SendJSON(in interface{}) error
 	Status(status int) Context
 	Set(key string, value string)
 	Get(key string) string
 	Body() string
+	ParseBody(out interface{}) error
 }
 
 // handlerFunc defines the handler used by middleware as return value.
@@ -50,12 +62,35 @@ func (ctx *context) Context() *fasthttp.RequestCtx {
 	return ctx.requestCtx
 }
 
-// SendString sets body of response as a string
+// SendBytes sets body of response for []byte type
+func (ctx *context) SendBytes(value []byte) Context {
+	ctx.requestCtx.Response.SetBodyRaw(value)
+	return ctx
+}
+
+// SendString sets body of response for string type
 func (ctx *context) SendString(value string) Context {
 	ctx.requestCtx.SetBodyString(value)
 	return ctx
 }
 
+// SendJSON converts any interface to json, sets it to the body of response
+// and sets content type header to application/json.
+func (ctx *context) SendJSON(in interface{}) error {
+	json := jsoniter.ConfigCompatibleWithStandardLibrary
+	raw, err := json.Marshal(in)
+	// Check for errors
+	if err != nil {
+		return err
+	}
+
+	// Set http headers
+	ctx.requestCtx.Response.Header.SetContentType(MIMEApplicationJSON)
+	ctx.requestCtx.Response.SetBodyRaw(raw)
+
+	return nil
+}
+
 // Status sets the HTTP status code
 func (ctx *context) Status(status int) Context {
 	ctx.requestCtx.Response.SetStatusCode(status)
@@ -81,3 +116,18 @@ func (ctx *context) Query(key string) string {
 func (ctx *context) Body() string {
 	return GetString(ctx.requestCtx.Request.Body())
 }
+
+// ParseBody parses request body into provided struct
+// Supports decoding theses types: application/json
+func (ctx *context) ParseBody(out interface{}) error {
+	contentType := GetString(ctx.requestCtx.Request.Header.ContentType())
+	if strings.HasPrefix(contentType, MIMEApplicationJSON) {
+		json := jsoniter.ConfigCompatibleWithStandardLibrary
+		return json.Unmarshal(ctx.requestCtx.Request.Body(), out)
+	}
+
+	return fmt.Errorf("content type '%s' is not supported, "+
+		"please open a request to support it "+
+		"(https://github.com/gogearbox/gearbox/issues/new?template=feature_request.md)",
+		contentType)
+}

gearbox.go

@@ -15,7 +15,7 @@ import (
 
 // Exported constants
 const (
-	Version = "1.1.0"   // Version of gearbox
+	Version = "1.1.1"   // Version of gearbox
 	Name    = "Gearbox" // Name of gearbox
 	// http://patorjk.com/software/taag/#p=display&f=Big%20Money-ne&t=Gearbox
 	banner = `

go.mod

@@ -2,4 +2,7 @@ module github.com/gogearbox/gearbox
 
 go 1.14
 
-require github.com/valyala/fasthttp v1.15.1
+require (
+	github.com/json-iterator/go v1.1.10
+	github.com/valyala/fasthttp v1.15.1
+)

go.sum

@@ -1,7 +1,19 @@
 github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDafo4=
 github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr68=
+github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/klauspost/compress v1.10.7 h1:7rix8v8GpI3ZBb0nSozFRgbtXKv+hOe+qfEpZqybrAg=
 github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLDQ0W1YjYsBW+p8U2u7vzgW2SQVmlNazg=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.15.1 h1:eRb5jzWhbCn/cGu3gNJMcOfPUfXgXCcQIOHjh9ajAS8=