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
|
package api
import (
"bytes"
"fmt"
"io"
"mime"
"os"
"os/exec"
"github.com/aptly-dev/aptly/deb"
"github.com/gin-gonic/gin"
)
// GET /api/graph.:ext?layout=[vertical|horizontal(default)]
func apiGraph(c *gin.Context) {
var (
err error
output []byte
)
ext := c.Params.ByName("ext")
layout := c.Request.URL.Query().Get("layout")
factory := context.CollectionFactory()
factory.RemoteRepoCollection().Lock()
defer factory.RemoteRepoCollection().Unlock()
factory.LocalRepoCollection().Lock()
defer factory.LocalRepoCollection().Unlock()
factory.SnapshotCollection().Lock()
defer factory.SnapshotCollection().Unlock()
factory.PublishedRepoCollection().Lock()
defer factory.PublishedRepoCollection().Unlock()
graph, err := deb.BuildGraph(factory, layout)
if err != nil {
c.JSON(500, err)
return
}
buf := bytes.NewBufferString(graph.String())
if ext == "dot" || ext == "gv" {
// If the raw dot data is requested, return it as string.
// This allows client-side rendering rather than server-side.
c.String(200, buf.String())
return
}
command := exec.Command("dot", "-T"+ext)
command.Stderr = os.Stderr
stdin, err := command.StdinPipe()
if err != nil {
c.AbortWithError(500, err)
return
}
_, err = io.Copy(stdin, buf)
if err != nil {
c.AbortWithError(500, err)
return
}
err = stdin.Close()
if err != nil {
c.AbortWithError(500, err)
return
}
output, err = command.Output()
if err != nil {
c.AbortWithError(500, fmt.Errorf("unable to execute dot: %s (is graphviz package installed?)", err))
return
}
mimeType := mime.TypeByExtension("." + ext)
if mimeType == "" {
mimeType = "application/octet-stream"
}
c.Data(200, mimeType, output)
}
|
