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
|
package disk
import (
"context"
"fmt"
"io"
"net/http"
"strconv"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
"gitlab.com/gitlab-org/gitlab-pages/internal/serving"
"gitlab.com/gitlab-org/gitlab-pages/internal/serving/disk/symlink"
"gitlab.com/gitlab-org/gitlab-pages/internal/vfs"
)
// Reader is a disk access driver
type Reader struct {
fileSizeMetric prometheus.Histogram
vfs vfs.VFS
}
func (reader *Reader) tryFile(h serving.Handler) error {
ctx := h.Request.Context()
root, fullPath, err := reader.resolvePath(ctx, h.LookupPath, h.SubPath)
request := h.Request
host := request.Host
urlPath := request.URL.Path
if locationError, _ := err.(*locationDirectoryError); locationError != nil {
if endsWithSlash(urlPath) {
root, fullPath, err = reader.resolvePath(ctx, h.LookupPath, h.SubPath, "index.html")
} else {
// TODO why are we doing that? In tests it redirects to HTTPS. This seems wrong,
// issue about this: https://gitlab.com/gitlab-org/gitlab-pages/issues/273
// Concat Host with URL.Path
redirectPath := "//" + host + "/"
redirectPath += strings.TrimPrefix(urlPath, "/")
// Ensure that there's always "/" at end
redirectPath = strings.TrimSuffix(redirectPath, "/") + "/"
http.Redirect(h.Writer, h.Request, redirectPath, 302)
return nil
}
}
if locationError, _ := err.(*locationFileNoExtensionError); locationError != nil {
root, fullPath, err = reader.resolvePath(ctx, h.LookupPath, strings.TrimSuffix(h.SubPath, "/")+".html")
}
if err != nil {
return err
}
return reader.serveFile(ctx, h.Writer, h.Request, root, fullPath, h.LookupPath.HasAccessControl)
}
func (reader *Reader) tryNotFound(h serving.Handler) error {
ctx := h.Request.Context()
root, page404, err := reader.resolvePath(ctx, h.LookupPath, "404.html")
if err != nil {
return err
}
err = reader.serveCustomFile(ctx, h.Writer, h.Request, http.StatusNotFound, root, page404)
if err != nil {
return err
}
return nil
}
// Resolve the HTTP request to a path on disk, converting requests for
// directories to requests for index.html inside the directory if appropriate.
func (reader *Reader) resolvePath(ctx context.Context, lookupPath *serving.LookupPath, subPath ...string) (vfs.Root, string, error) {
root, err := reader.vfs.Root(ctx, lookupPath.Path)
if err != nil {
return nil, "", err
}
// Don't use filepath.Join as cleans the path,
// where we want to traverse full path as supplied by user
// (including ..)
testPath := strings.Join(subPath, "/")
fullPath, err := symlink.EvalSymlinks(ctx, root, testPath)
if err != nil {
if endsWithoutHTMLExtension(testPath) {
return nil, "", &locationFileNoExtensionError{
FullPath: fullPath,
}
}
return nil, "", err
}
fi, err := root.Lstat(ctx, fullPath)
if err != nil {
return nil, "", err
}
// The requested path is a directory, so try index.html via recursion
if fi.IsDir() {
return nil, "", &locationDirectoryError{
FullPath: fullPath,
RelativePath: testPath,
}
}
// The file exists, but is not a supported type to serve. Perhaps a block
// special device or something else that may be a security risk.
if !fi.Mode().IsRegular() {
return nil, "", fmt.Errorf("%s: is not a regular file", fullPath)
}
return root, fullPath, nil
}
func (reader *Reader) serveFile(ctx context.Context, w http.ResponseWriter, r *http.Request, root vfs.Root, origPath string, accessControl bool) error {
fullPath := reader.handleGZip(ctx, w, r, root, origPath)
file, err := root.Open(ctx, fullPath)
if err != nil {
return err
}
defer file.Close()
fi, err := root.Lstat(ctx, fullPath)
if err != nil {
return err
}
if !accessControl {
// Set caching headers
w.Header().Set("Cache-Control", "max-age=600")
w.Header().Set("Expires", time.Now().Add(10*time.Minute).Format(time.RFC1123))
}
contentType, err := reader.detectContentType(ctx, root, origPath)
if err != nil {
return err
}
reader.fileSizeMetric.Observe(float64(fi.Size()))
w.Header().Set("Content-Type", contentType)
http.ServeContent(w, r, origPath, fi.ModTime(), file)
return nil
}
func (reader *Reader) serveCustomFile(ctx context.Context, w http.ResponseWriter, r *http.Request, code int, root vfs.Root, origPath string) error {
fullPath := reader.handleGZip(ctx, w, r, root, origPath)
// Open and serve content of file
file, err := root.Open(ctx, fullPath)
if err != nil {
return err
}
defer file.Close()
fi, err := root.Lstat(ctx, fullPath)
if err != nil {
return err
}
contentType, err := reader.detectContentType(ctx, root, origPath)
if err != nil {
return err
}
reader.fileSizeMetric.Observe(float64(fi.Size()))
w.Header().Set("Content-Type", contentType)
w.Header().Set("Content-Length", strconv.FormatInt(fi.Size(), 10))
w.WriteHeader(code)
if r.Method != "HEAD" {
_, err := io.CopyN(w, file, fi.Size())
return err
}
return nil
}
|
