forked from northwesternmutual/grammes
/
request.go
116 lines (94 loc) · 3.58 KB
/
request.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
// Copyright (c) 2018 Northwestern Mutual.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package gremconnect
import (
"encoding/base64"
"time"
"github.com/goccy/go-json"
"github.com/google/uuid"
)
// 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"`
}
var (
// GenUUID is a monkey patched function for the Google UUIDv4 generator.
GenUUID = uuid.NewUUID
// jsonMarshal is a monkey patched function for the standard json.Marshal.
jsonMarshal = json.Marshal
)
// PrepareRequest packages a query and binding
// into the format that Gremlin Server accepts
func PrepareRequest(query string, queryTimeout *time.Duration, bindings, rebindings map[string]string, sessionId *uuid.UUID) (req Request, id string, err error) {
var guuid uuid.UUID
if guuid, err = GenUUID(); err != nil {
return
}
id = guuid.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
if queryTimeout != nil {
req.Args["evaluationTimeout"] = queryTimeout.Milliseconds()
}
if sessionId != nil {
if query == "" {
req.Op = "close"
req.Args = make(map[string]interface{}) // Empty args if we're closing a session
}
req.Args["session"] = sessionId.String()
req.Processor = "session"
}
return
}
// PackageRequest takes a request type and formats
// it into being able to be delivered to the TinkerPop server.
func PackageRequest(req Request, versionNumber string) (msg []byte, err error) {
j, err := jsonMarshal(req) // Formats request into byte format
if err != nil {
return
}
// ! is the prefix for the mimeType header.
msg = []byte("!application/vnd.gremlin-v" + versionNumber + ".0+json")
msg = append(msg, j...)
return
}
// PrepareAuthRequest creates a request for
// the dialer to send to the Gremlin-Server.
func PrepareAuthRequest(requestID string, username string, password string) (req Request, err error) {
req.RequestID = requestID
req.Op = "authentication"
req.Processor = "traversal"
simpleAuth := make([]byte, len(username)+len(password)+2)
copy(simpleAuth[1:], username)
copy(simpleAuth[len(username)+2:], password)
req.Args = make(map[string]interface{})
req.Args["sasl"] = base64.StdEncoding.EncodeToString(simpleAuth)
return
}