/
responsewriter.go
66 lines (57 loc) · 1.61 KB
/
responsewriter.go
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package client
import (
"io"
"github.com/plgd-dev/go-coap/v2/message"
"github.com/plgd-dev/go-coap/v2/message/codes"
"github.com/plgd-dev/go-coap/v2/message/noresponse"
udpMessage "github.com/plgd-dev/go-coap/v2/udp/message"
"github.com/plgd-dev/go-coap/v2/udp/message/pool"
)
// A ResponseWriter interface is used by an COAP handler to construct an COAP response.
type ResponseWriter struct {
noResponseValue *uint32
response *pool.Message
cc *ClientConn
}
func NewResponseWriter(response *pool.Message, cc *ClientConn, requestOptions message.Options) *ResponseWriter {
var noResponseValue *uint32
v, err := requestOptions.GetUint32(message.NoResponse)
if err == nil {
noResponseValue = &v
}
return &ResponseWriter{
response: response,
cc: cc,
noResponseValue: noResponseValue,
}
}
func (r *ResponseWriter) SetResponse(code codes.Code, contentFormat message.MediaType, d io.ReadSeeker, opts ...message.Option) error {
if r.noResponseValue != nil {
err := noresponse.IsNoResponseCode(code, *r.noResponseValue)
if err != nil {
return err
}
}
r.response.SetCode(code)
r.response.ResetOptionsTo(opts)
if d != nil {
r.response.SetContentFormat(contentFormat)
r.response.SetBody(d)
if !r.response.HasOption(message.ETag) {
etag, err := message.GetETag(d)
if err != nil {
return err
}
r.response.SetOptionBytes(message.ETag, etag)
}
}
return nil
}
func (r *ResponseWriter) ClientConn() *ClientConn {
return r.cc
}
func (r *ResponseWriter) SendReset() {
r.response.Reset()
r.response.SetCode(codes.Empty)
r.response.SetType(udpMessage.Reset)
}