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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
package blob
import (
"bytes"
"errors"
"io"
"gitlab.com/gitlab-org/gitaly/v16/internal/git"
"gitlab.com/gitlab-org/gitaly/v16/internal/git/catfile"
"gitlab.com/gitlab-org/gitaly/v16/internal/gitaly/service"
"gitlab.com/gitlab-org/gitaly/v16/internal/structerr"
"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
"gitlab.com/gitlab-org/gitaly/v16/streamio"
)
var treeEntryToObjectType = map[gitalypb.TreeEntry_EntryType]gitalypb.ObjectType{
gitalypb.TreeEntry_BLOB: gitalypb.ObjectType_BLOB,
gitalypb.TreeEntry_TREE: gitalypb.ObjectType_TREE,
gitalypb.TreeEntry_COMMIT: gitalypb.ObjectType_COMMIT,
}
func sendGetBlobsResponse(
req *gitalypb.GetBlobsRequest,
stream gitalypb.BlobService_GetBlobsServer,
objectReader catfile.ObjectContentReader,
objectInfoReader catfile.ObjectInfoReader,
) error {
ctx := stream.Context()
tef := catfile.NewTreeEntryFinder(objectReader, objectInfoReader)
for _, revisionPath := range req.RevisionPaths {
revision := revisionPath.Revision
path := revisionPath.Path
if len(path) > 1 {
path = bytes.TrimRight(path, "/")
}
treeEntry, err := tef.FindByRevisionAndPath(ctx, revision, string(path))
if err != nil {
return structerr.NewInternal("find by revision and path: %w", err)
}
response := &gitalypb.GetBlobsResponse{Revision: revision, Path: path}
if treeEntry == nil || len(treeEntry.Oid) == 0 {
if err := stream.Send(response); err != nil {
return structerr.NewUnavailable("send: %w", err)
}
continue
}
response.Mode = treeEntry.Mode
response.Oid = treeEntry.Oid
if treeEntry.Type == gitalypb.TreeEntry_COMMIT {
response.IsSubmodule = true
response.Type = gitalypb.ObjectType_COMMIT
if err := stream.Send(response); err != nil {
return structerr.NewUnavailable("send: %w", err)
}
continue
}
objectInfo, err := objectInfoReader.Info(ctx, git.Revision(treeEntry.Oid))
if err != nil {
return structerr.NewInternal("read object info: %w", err)
}
response.Size = objectInfo.Size
var ok bool
response.Type, ok = treeEntryToObjectType[treeEntry.Type]
if !ok {
continue
}
if response.Type != gitalypb.ObjectType_BLOB {
if err := stream.Send(response); err != nil {
return structerr.NewUnavailable("send: %w", err)
}
continue
}
if err = sendBlobTreeEntry(response, stream, objectReader, req.GetLimit()); err != nil {
return err
}
}
return nil
}
func sendBlobTreeEntry(
response *gitalypb.GetBlobsResponse,
stream gitalypb.BlobService_GetBlobsServer,
objectReader catfile.ObjectContentReader,
limit int64,
) (returnedErr error) {
ctx := stream.Context()
var readLimit int64
if limit < 0 || limit > response.Size {
readLimit = response.Size
} else {
readLimit = limit
}
// For correctness, it does not matter, but for performance, the order is
// important: first check if readlimit == 0, if not, only then create
// blobObj.
if readLimit == 0 {
if err := stream.Send(response); err != nil {
return structerr.NewUnavailable("send: %w", err)
}
return nil
}
blobObj, err := objectReader.Object(ctx, git.Revision(response.Oid))
if err != nil {
return structerr.NewInternal("read object: %w", err)
}
defer func() {
if _, err := io.Copy(io.Discard, blobObj); err != nil && returnedErr == nil {
returnedErr = structerr.NewInternal("discarding data: %w", err)
}
}()
if blobObj.Type != "blob" {
return structerr.NewInternal("blob got unexpected type %q", blobObj.Type)
}
sw := streamio.NewWriter(func(p []byte) error {
msg := &gitalypb.GetBlobsResponse{}
if response != nil {
msg = response
response = nil
}
msg.Data = p
return stream.Send(msg)
})
_, err = io.CopyN(sw, blobObj, readLimit)
if err != nil {
return structerr.NewUnavailable("send: %w", err)
}
return nil
}
func (s *server) GetBlobs(req *gitalypb.GetBlobsRequest, stream gitalypb.BlobService_GetBlobsServer) error {
if err := validateGetBlobsRequest(req); err != nil {
return structerr.NewInvalidArgument("%w", err)
}
repo := s.localrepo(req.GetRepository())
objectReader, cancel, err := s.catfileCache.ObjectReader(stream.Context(), repo)
if err != nil {
return structerr.NewInternal("creating object reader: %w", err)
}
defer cancel()
objectInfoReader, cancel, err := s.catfileCache.ObjectInfoReader(stream.Context(), repo)
if err != nil {
return structerr.NewInternal("creating object info reader: %w", err)
}
defer cancel()
return sendGetBlobsResponse(req, stream, objectReader, objectInfoReader)
}
func validateGetBlobsRequest(req *gitalypb.GetBlobsRequest) error {
if err := service.ValidateRepository(req.GetRepository()); err != nil {
return err
}
if len(req.RevisionPaths) == 0 {
return errors.New("empty RevisionPaths")
}
for _, rp := range req.RevisionPaths {
if err := git.ValidateRevision([]byte(rp.Revision)); err != nil {
return err
}
}
return nil
}
|
