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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const { Cu, components } = require("chrome");
const { defer } = require("../core/promise");
const { merge } = require("../util/object");
const { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm", {});
/**
* Open a channel synchronously for the URI given, with an optional charset, and
* returns a resolved promise if succeed; rejected promise otherwise.
*/
function readSync(uri, charset) {
let { promise, resolve, reject } = defer();
try {
resolve(readURISync(uri, charset));
}
catch (e) {
reject("Failed to read: '" + uri + "' (Error Code: " + e.result + ")");
}
return promise;
}
/**
* Open a channel synchronously for the URI given, with an optional charset, and
* returns a promise.
*/
function readAsync(uri, charset) {
let channel = NetUtil.newChannel(uri, charset, null);
let { promise, resolve, reject } = defer();
NetUtil.asyncFetch(channel, function (stream, result) {
if (components.isSuccessCode(result)) {
let count = stream.available();
let data = NetUtil.readInputStreamToString(stream, count, { charset : charset });
resolve(data);
} else {
reject("Failed to read: '" + uri + "' (Error Code: " + result + ")");
}
});
return promise;
}
/**
* Reads a URI and returns a promise. If the `sync` option is set to `true`, the
* promise will be resolved synchronously.
*
* @param uri {string} The URI to read
* @param [options] {object} This parameter can have any or all of the following
* fields: `sync`, `charset`. By default the `charset` is set to 'UTF-8'.
*
* @returns {promise} The promise that will be resolved with the content of the
* URL given.
*
* @example
* let promise = readURI('resource://gre/modules/NetUtil.jsm', {
* sync: true,
* charset: 'US-ASCII'
});
*/
function readURI(uri, options) {
options = merge({
charset: "UTF-8",
sync: false
}, options);
return options.sync
? readSync(uri, options.charset)
: readAsync(uri, options.charset);
}
exports.readURI = readURI;
/**
* Reads a URI synchronously.
* This function is intentionally undocumented to favorites the `readURI` usage.
*
* @param uri {string} The URI to read
* @param [charset] {string} The character set to use when read the content of
* the `uri` given. By default is set to 'UTF-8'.
*
* @returns {string} The content of the URI given.
*
* @example
* let data = readURISync('resource://gre/modules/NetUtil.jsm');
*/
function readURISync(uri, charset) {
charset = typeof charset === "string" ? charset : "UTF-8";
let channel = NetUtil.newChannel(uri, charset, null);
let stream = channel.open();
let count = stream.available();
let data = NetUtil.readInputStreamToString(stream, count, { charset : charset });
stream.close();
return data;
}
exports.readURISync = readURISync;
|
