func getQuery(req cmds.Request) (string, error) {
query := url.Values{}
for k, v := range req.Options() {
str := fmt.Sprintf("%v", v)
query.Set(k, str)
}
args := req.Arguments()
argDefs := req.Command().Arguments
argDefIndex := 0
for _, arg := range args {
argDef := argDefs[argDefIndex]
// skip ArgFiles
for argDef.Type == cmds.ArgFile {
argDefIndex++
argDef = argDefs[argDefIndex]
}
query.Add("arg", arg)
if len(argDefs) > argDefIndex+1 {
argDefIndex++
}
}
return query.Encode(), nil
}
// commandShouldRunOnDaemon determines, from commmand details, whether a
// command ought to be executed on an IPFS daemon.
//
// It returns a client if the command should be executed on a daemon and nil if
// it should be executed on a client. It returns an error if the command must
// NOT be executed on either.
func commandShouldRunOnDaemon(details cmdDetails, req cmds.Request, root *cmds.Command) (cmdsHttp.Client, error) {
path := req.Path()
// root command.
if len(path) < 1 {
return nil, nil
}
if details.cannotRunOnClient && details.cannotRunOnDaemon {
return nil, fmt.Errorf("command disabled: %s", path[0])
}
if details.doesNotUseRepo && details.canRunOnClient() {
return nil, nil
}
// at this point need to know whether api is running. we defer
// to this point so that we dont check unnecessarily
// did user specify an api to use for this command?
apiAddrStr, _, err := req.Option(coreCmds.ApiOption).String()
if err != nil {
return nil, err
}
client, err := getApiClient(req.InvocContext().ConfigRoot, apiAddrStr)
if err == repo.ErrApiNotRunning {
if apiAddrStr != "" && req.Command() != daemonCmd {
// if user SPECIFIED an api, and this cmd is not daemon
// we MUST use it. so error out.
return nil, err
}
// ok for api not to be running
} else if err != nil { // some other api error
return nil, err
}
if client != nil { // daemon is running
if details.cannotRunOnDaemon {
e := "cannot use API with this command."
// check if daemon locked. legacy error text, for now.
daemonLocked, _ := fsrepo.LockedByOtherProcess(req.InvocContext().ConfigRoot)
if daemonLocked {
e = "ipfs daemon is running. please stop it to run this command"
}
return nil, cmds.ClientError(e)
}
return client, nil
}
if details.cannotRunOnClient {
return nil, cmds.ClientError("must run on the ipfs daemon")
}
return nil, nil
}
// read json objects off of the given stream, and write the objects out to
// the 'out' channel
func readStreamedJson(req cmds.Request, rr io.Reader, out chan<- interface{}) {
defer close(out)
dec := json.NewDecoder(rr)
outputType := reflect.TypeOf(req.Command().Type)
ctx := req.Context()
for {
v, err := decodeTypedVal(outputType, dec)
if err != nil {
if err != io.EOF {
log.Error(err)
}
return
}
select {
case <-ctx.Done():
return
case out <- v:
}
}
}
// 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)
}
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
}