/
fs.js
179 lines (169 loc) · 5.93 KB
/
fs.js
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
"use strict";
var fs = require("fs");
var path = require("path");
var glob = require("glob");
// Returns whether a file exists.
function existsSync(file) {
// This fs method is going to be deprecated but can be re-implemented with fs.accessSync later.
return fs.existsSync(file);
}
function pathInSandboxDir(fsPath, sandboxDir) {
if (path.relative(sandboxDir, fsPath).match(/^\.\./)) {
return false;
} else {
return true;
}
}
module.exports = function(eyeglass, sass) {
var sassUtils = require("node-sass-utils")(sass);
function inSandbox(fsPath) {
var sandbox = eyeglass.options.fsSandbox;
if (!sandbox) {
return true;
}
if (Array.isArray(sandbox)) {
for (var i = 0; i < sandbox.length; i ++) {
var sb = sandbox[i];
if (pathInSandboxDir(fsPath, sb)) {
return true;
}
}
return false;
} else {
throw new Error("unknown value for sandbox");
}
return false;
}
function globFiles(directory, globPattern, includeFiles, includeDirectories, done) {
if (inSandbox(directory)) {
var globOpts = {
root: directory,
cwd: directory,
mark: true
};
glob(globPattern, globOpts, function(error, files) {
if (error) {
done(sass.types.Error(error.message));
} else {
var filesToReturn = [];
for (var i = 0; i < files.length; i++) {
var endsWithSlash = /\/$/.test(files[i]);
if (endsWithSlash && includeDirectories) {
if (!inSandbox(path.join(directory, files[i]))) {
done(sass.types.Error("Security violation: Cannot access " + files[i]));
return;
}
filesToReturn[filesToReturn.length] = files[i].slice(-files[i].length, -1);
}
if (!endsWithSlash && includeFiles) {
if (!inSandbox(path.join(directory, files[i]))) {
done(sass.types.Error("Security violation: Cannot access " + files[i]));
return;
}
filesToReturn[filesToReturn.length] = files[i];
}
}
done(sassUtils.castToSass(filesToReturn));
}
});
} else {
done(sass.types.Error("Security violation: Cannot access " + directory));
}
}
return {
"eyeglass-fs-absolute-path($fs-registered-pathnames, $path-id, $segments...)":
function(fsRegisteredPathnames, fsPathId, fsSegments, done) {
var pathId = sassUtils.castToJs(fsPathId);
var segments = sassUtils.castToJs(fsSegments);
var registeredPathnames = sassUtils.castToJs(fsRegisteredPathnames);
var expandedPath = registeredPathnames.coerce.get(pathId);
if (expandedPath) {
segments.unshift(expandedPath);
var resolved = path.resolve.apply(path, segments);
done(sass.types.String(resolved));
} else {
done(new Error("No path is registered for " + pathId));
}
},
"eyeglass-fs-join($segments...)": function(segments, done) {
var jsSegments = sassUtils.castToJs(segments);
var joined = path.join.apply(path, jsSegments);
done(sass.types.String(joined));
},
"eyeglass-fs-exists($absolute-path)": function(fsAbsolutePath, done) {
var absolutePath = fsAbsolutePath.getValue();
if (inSandbox(absolutePath)) {
if (existsSync(absolutePath)) {
done(sass.TRUE);
} else {
done(sass.FALSE);
}
} else {
done(sass.types.Error("Security violation: Cannot access " + absolutePath));
}
},
"eyeglass-fs-path-separator()": function(done) {
done(sass.types.String(path.sep));
},
"eyeglass-fs-list-files($directory, $glob: '*')": function(directory, globPattern, done) {
globFiles(directory.getValue(), globPattern.getValue(), true, false, done);
},
"eyeglass-fs-list-directories($directory, $glob: '*')": function(directory, globPattern, done) {
globFiles(directory.getValue(), globPattern.getValue(), false, true, done);
},
"eyeglass-fs-parse-filename($filename)": function(filename, done) {
var parsedFilename = path.parse(filename.getValue());
done(
sassUtils.castToSass({
base: parsedFilename.base,
dir: parsedFilename.dir,
name: parsedFilename.name,
ext: parsedFilename.ext,
"is-absolute": path.isAbsolute(filename.getValue())
})
);
},
"eyeglass-fs-info($filename)": function(sassFilename, done) {
var filename = sassFilename.getValue();
if (inSandbox(filename)) {
fs.stat(filename, function(err, stats) {
if (err) {
done(sass.types.Error(err.message));
} else {
try {
var realpath = fs.realpathSync(filename);
done(
sassUtils.castToSass({
"modification-time": stats.mtime.getTime(),
"creation-time": stats.birthtime.getTime(),
"is-file": stats.isFile(),
"is-directory": stats.isDirectory(),
"real-path": realpath,
"size": stats.size,
})
);
} catch (e) {
done(sass.types.Error(e.message));
}
}
});
} else {
done(sass.types.Error("Security violation: Cannot access " + filename));
}
},
"eyeglass-fs-read-file($filename)": function(sassFilename, done) {
var filename = sassFilename.getValue();
if (inSandbox(filename)) {
fs.readFile(filename, function(err, contents) {
if (err) {
done(sass.types.Error(err.message));
} else {
done(sassUtils.castToSass(contents.toString()));
}
});
} else {
done(sass.types.Error("Security violation: Cannot access " + filename));
}
}
};
};