response.go

package atreugo

import (
	jsoniter "github.com/json-iterator/go"
	"github.com/valyala/bytebufferpool"
	"github.com/valyala/fasthttp"
)

func (ctx *RequestCtx) newResponse(contentType string, statusCode ...int) {
	ctx.SetContentType(contentType)

	if len(statusCode) > 0 {
		ctx.SetStatusCode(statusCode[0])
	} else {
		ctx.SetStatusCode(fasthttp.StatusOK)
	}
}

// JSONResponse return response with body in json format
func (ctx *RequestCtx) JSONResponse(body interface{}, statusCode ...int) error {
	ctx.newResponse("application/json", statusCode...)

	data, err := jsoniter.Marshal(body)
	if err != nil {
		return err
	}
	ctx.SetBody(data)

	return nil
}

// HTTPResponse return response with body in html format
func (ctx *RequestCtx) HTTPResponse(body string, statusCode ...int) error {
	ctx.newResponse("text/html; charset=utf-8", statusCode...)
	ctx.SetBodyString(body)

	return nil
}

// HTTPResponseBytes return response with body in html format
func (ctx *RequestCtx) HTTPResponseBytes(body []byte, statusCode ...int) error {
	ctx.newResponse("text/html; charset=utf-8", statusCode...)
	ctx.SetBody(body)

	return nil
}

// TextResponse return response with body in text format
func (ctx *RequestCtx) TextResponse(body string, statusCode ...int) error {
	ctx.newResponse("text/plain; charset=utf-8", statusCode...)
	ctx.SetBodyString(body)

	return nil
}

// TextResponseBytes return response with body in text format
func (ctx *RequestCtx) TextResponseBytes(body []byte, statusCode ...int) error {
	ctx.newResponse("text/plain; charset=utf-8", statusCode...)
	ctx.SetBody(body)

	return nil
}

// RawResponse returns response without encoding the body.
func (ctx *RequestCtx) RawResponse(body string, statusCode ...int) error {
	ctx.newResponse("application/octet-stream", statusCode...)
	ctx.SetBodyString(body)

	return nil
}

// RawResponseBytes returns response without encoding the body.
func (ctx *RequestCtx) RawResponseBytes(body []byte, statusCode ...int) error {
	ctx.newResponse("application/octet-stream", statusCode...)
	ctx.SetBody(body)

	return nil
}

// FileResponse return a streaming response with file data.
func (ctx *RequestCtx) FileResponse(fileName, filePath, mimeType string) error {
	fasthttp.ServeFile(ctx.RequestCtx, filePath)

	buff := bytebufferpool.Get()
	buff.SetString("attachment; filename=")
	buff.WriteString(fileName)

	ctx.Response.Header.Set("Content-Disposition", buff.String())
	ctx.SetContentType(mimeType)

	bytebufferpool.Put(buff)

	return nil
}

// RedirectResponse redirect request to an especific url
func (ctx *RequestCtx) RedirectResponse(url string, statusCode int) error {
	ctx.Redirect(url, statusCode)

	return nil
}

// ErrorResponse returns an error response.
func (ctx *RequestCtx) ErrorResponse(err error, statusCode ...int) error {
	if len(statusCode) > 0 {
		ctx.SetStatusCode(statusCode[0])
	} else {
		ctx.SetStatusCode(fasthttp.StatusInternalServerError)
	}

	return err
}