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render.go
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render.go
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package gors
import (
"context"
"google.golang.org/protobuf/encoding/protojson"
// "errors"
"fmt"
"io"
"strings"
"github.com/gin-gonic/gin/render"
internalrender "github.com/go-leo/gors/internal/pkg/render"
"github.com/go-leo/gox/iox"
"google.golang.org/grpc/metadata"
)
func ErrorRender(
ctx context.Context,
err error,
handler func(ctx context.Context, err error) error,
wrapper func(resp any) any,
) {
_ = FromContext(ctx).Error(err)
if handler != nil {
err = handler(ctx, err)
if err == nil {
return
}
}
gorserr := FromError(err)
ResponseRender(ctx, gorserr.StatusCode, gorserr.Status(), "", JSONRender, wrapper)
}
func ResponseRender(
ctx context.Context,
code int,
resp any,
contentType string,
render func(ctx context.Context, code int, resp any, contentType string),
wrapper func(resp any) any,
) {
addHeaders(ctx)
addTrailersHeader(ctx)
// wrapper response
if wrapper != nil {
resp = wrapper(resp)
}
// render
render(ctx, code, resp, contentType)
addTrailers(ctx)
}
func addHeaders(ctx context.Context) {
c := FromContext(ctx)
header := Header(ctx)
for key, values := range header {
for _, value := range values {
c.Writer.Header().Add(key, value)
}
}
}
func addTrailersHeader(ctx context.Context) {
c := FromContext(ctx)
doForwardTrailers := strings.Contains(strings.ToLower(c.GetHeader("TE")), "trailers")
if !doForwardTrailers {
return
}
trailer := Trailer(ctx)
if len(trailer) <= 0 {
return
}
for k := range trailer {
c.Writer.Header().Add("Trailer", k)
}
c.Writer.Header().Set("Transfer-Encoding", "chunked")
}
func addTrailers(ctx context.Context) {
c := FromContext(ctx)
doForwardTrailers := strings.Contains(strings.ToLower(c.GetHeader("TE")), "trailers")
if !doForwardTrailers {
return
}
trailer := Trailer(ctx)
if len(trailer) <= 0 {
return
}
for key, values := range trailer {
for _, value := range values {
c.Writer.Header().Add(key, value)
}
}
}
func BytesRender(ctx context.Context, code int, resp any, contentType string) {
FromContext(ctx).Render(code, render.Data{ContentType: contentType, Data: resp.([]byte)})
}
func StringRender(ctx context.Context, code int, resp any, contentType string) {
FromContext(ctx).Render(code, render.Data{ContentType: contentType, Data: []byte(resp.(string))})
}
func TextRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).String(code, resp.(string))
}
func HTMLRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).Render(code, render.Data{ContentType: "text/html; charset=utf-8", Data: []byte(resp.(string))})
}
func RedirectRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).Redirect(code, resp.(string))
}
func ReaderRender(ctx context.Context, code int, resp any, contentType string) {
r := resp.(io.Reader)
length := int64(-1)
l, ok := iox.Len(r)
if ok {
length = int64(l)
}
FromContext(ctx).Render(code, render.Reader{ContentType: contentType, ContentLength: length, Reader: r})
}
func JSONRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).JSON(code, resp)
}
func IndentedJSONRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).IndentedJSON(code, resp)
}
func SecureJSONRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).SecureJSON(code, resp)
}
func JSONPJSONRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).JSONP(code, resp)
}
func PureJSONRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).PureJSON(code, resp)
}
func AsciiJSONRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).AsciiJSON(code, resp)
}
func ProtoJSONRender(mo protojson.MarshalOptions) func(ctx context.Context, code int, resp any, _ string) {
return func(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).Render(code, internalrender.ProtoJSON{Data: resp, MarshalOptions: mo})
}
}
func XMLRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).XML(code, resp)
}
func YAMLRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).YAML(code, resp)
}
func ProtoBufRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).ProtoBuf(code, resp)
}
func MsgPackRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).Render(code, render.MsgPack{Data: resp})
}
func TOMLRender(ctx context.Context, code int, resp any, _ string) {
FromContext(ctx).TOML(code, resp)
}
func CustomRender(ctx context.Context, code int, resp any, _ string) {
customRender, ok := resp.(Render)
if !ok {
return
}
customRender.Render(ctx)
}
func AddGRPCMetadata(
ctx context.Context,
headerMD, trailerMD metadata.MD,
headerMatcher func(key string) (string, bool),
) {
if headerMatcher == nil {
headerMatcher = defaultOutgoingHeaderMatcher
}
header := Header(ctx)
for key, values := range headerMD {
if h, ok := headerMatcher(key); ok {
for _, v := range values {
header.Add(h, v)
}
}
}
trailer := Trailer(ctx)
for key, values := range trailerMD {
key = fmt.Sprintf("%s%s", MetadataTrailerPrefix, key)
for _, v := range values {
trailer.Add(key, v)
}
}
}
func defaultOutgoingHeaderMatcher(key string) (string, bool) {
return fmt.Sprintf("%s%s", MetadataHeaderPrefix, key), true
}
var DefaultMarshalOptions = protojson.MarshalOptions{}