forked from qasaur/gremgo
/
request.go
73 lines (53 loc) · 1.54 KB
/
request.go
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package gremgo
import (
"encoding/json"
"github.com/satori/go.uuid"
)
/////
type requester interface {
prepare() error
getID() string
getRequest() request
}
/////
// request is a container for all evaluation request parameters to be sent to the Gremlin Server.
type request struct {
Requestid string `json:"requestId"`
Op string `json:"op"`
Processor string `json:"processor"`
Args map[string]interface{} `json:"args"`
}
/////
// prepareRequest packages a query and binding into the format that Gremlin Server accepts
func prepareRequest(query string, bindings, rebindings map[string]string) (req request, id string) {
id = uuid.NewV4().String()
req.Requestid = id
req.Op = "eval"
req.Processor = ""
req.Args = make(map[string]interface{})
req.Args["language"] = "gremlin-groovy"
req.Args["gremlin"] = query
req.Args["bindings"] = bindings
req.Args["rebindings"] = rebindings
return
}
/////
// formatMessage takes a request type and formats it into being able to be delivered to Gremlin Server
func packageRequest(req request) (msg []byte, err error) {
j, err := json.Marshal(req) // Formats request into byte format
if err != nil {
return
}
mimetype := []byte("application/json")
mimetypelen := byte(len(mimetype))
msg = append(msg, mimetypelen)
msg = append(msg, mimetype...)
msg = append(msg, j...)
return
}
/////
// dispactchRequest sends the request for writing to the remote Gremlin Server
func (c *Client) dispatchRequest(msg []byte) {
c.requests <- msg
}
/////