// getResponse decodes a http.Response to create a cmds.Response
func getResponse(httpRes *http.Response, req cmds.Request) (cmds.Response, error) {
var err error
res := cmds.NewResponse(req)
contentType := httpRes.Header.Get(contentTypeHeader)
contentType = strings.Split(contentType, ";")[0]
lengthHeader := httpRes.Header.Get(extraContentLengthHeader)
if len(lengthHeader) > 0 {
length, err := strconv.ParseUint(lengthHeader, 10, 64)
if err != nil {
return nil, err
}
res.SetLength(length)
}
rr := &httpResponseReader{httpRes}
res.SetCloser(rr)
if contentType != applicationJson {
// for all non json output types, just stream back the output
res.SetOutput(rr)
return res, nil
} else if len(httpRes.Header.Get(channelHeader)) > 0 {
// if output is coming from a channel, decode each chunk
outChan := make(chan interface{})
go readStreamedJson(req, rr, outChan)
res.SetOutput((<-chan interface{})(outChan))
return res, nil
}
dec := json.NewDecoder(rr)
// If we ran into an error
if httpRes.StatusCode >= http.StatusBadRequest {
e := cmds.Error{}
switch {
case httpRes.StatusCode == http.StatusNotFound:
// handle 404s
e.Message = "Command not found."
e.Code = cmds.ErrClient
case contentType == plainText:
// handle non-marshalled errors
mes, err := ioutil.ReadAll(rr)
if err != nil {
return nil, err
}
e.Message = string(mes)
e.Code = cmds.ErrNormal
default:
// handle marshalled errors
err = dec.Decode(&e)
if err != nil {
return nil, err
}
}
res.SetError(e, e.Code)
return res, nil
}
outputType := reflect.TypeOf(req.Command().Type)
v, err := decodeTypedVal(outputType, dec)
if err != nil && err != io.EOF {
return nil, err
}
res.SetOutput(v)
return res, nil
}
// getResponse decodes a http.Response to create a cmds.Response
func getResponse(httpRes *http.Response, req cmds.Request) (cmds.Response, error) {
var err error
res := cmds.NewResponse(req)
contentType := httpRes.Header.Get(contentTypeHeader)
contentType = strings.Split(contentType, ";")[0]
lengthHeader := httpRes.Header.Get(contentLengthHeader)
if len(lengthHeader) > 0 {
length, err := strconv.ParseUint(lengthHeader, 10, 64)
if err != nil {
return nil, err
}
res.SetLength(length)
}
if len(httpRes.Header.Get(streamHeader)) > 0 {
// if output is a stream, we can just use the body reader
res.SetOutput(httpRes.Body)
return res, nil
} else if len(httpRes.Header.Get(channelHeader)) > 0 {
// if output is coming from a channel, decode each chunk
outChan := make(chan interface{})
go func() {
dec := json.NewDecoder(httpRes.Body)
outputType := reflect.TypeOf(req.Command().Type)
ctx := req.Context().Context
for {
var v interface{}
var err error
if outputType != nil {
v = reflect.New(outputType).Interface()
err = dec.Decode(v)
} else {
err = dec.Decode(&v)
}
if err != nil && err != io.EOF {
fmt.Println(err.Error())
return
}
select {
case <-ctx.Done():
close(outChan)
return
default:
}
if err == io.EOF {
close(outChan)
return
}
outChan <- v
}
}()
res.SetOutput((<-chan interface{})(outChan))
return res, nil
}
dec := json.NewDecoder(httpRes.Body)
if httpRes.StatusCode >= http.StatusBadRequest {
e := cmds.Error{}
if httpRes.StatusCode == http.StatusNotFound {
// handle 404s
e.Message = "Command not found."
e.Code = cmds.ErrClient
} else if contentType == "text/plain" {
// handle non-marshalled errors
buf := bytes.NewBuffer(nil)
io.Copy(buf, httpRes.Body)
e.Message = string(buf.Bytes())
e.Code = cmds.ErrNormal
} else {
// handle marshalled errors
err = dec.Decode(&e)
if err != nil {
return nil, err
}
}
res.SetError(e, e.Code)
} else {
outputType := reflect.TypeOf(req.Command().Type)
var v interface{}
if outputType != nil {
v = reflect.New(outputType).Interface()
err = dec.Decode(v)
} else {
err = dec.Decode(&v)
}
if err != nil && err != io.EOF {
return nil, err
}
if v != nil {
res.SetOutput(v)
}
}
return res, nil
}
