fs.mkdtemp(prefix[, options], callback)
prefix
<string>options
<string> | <Object>encoding
<string> 默认值:'utf8'
callback
<Function>
创建唯一的临时目录。
生成六个随机字符,附加在所需的 prefix
后面以创建唯一的临时目录。
由于平台的不一致,请避免在 prefix
中尾随 X
字符。
某些平台,尤其是 BSD,可能返回六个以上的随机字符,并将 prefix
中的尾随 X
字符替换为随机字符。
创建的目录路径作为字符串传递给回调的第二个参数。
可选的 options
参数可以是指定编码的字符串,也可以是具有 encoding
属性(指定要使用的字符编码)的对象。
fs.mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, directory) => {
if (err) throw err;
console.log(directory);
// 打印: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
});
fs.mkdtemp()
方法会将六个随机选择的字符直接附加到 prefix
字符串。
例如,给定目录 /tmp
,如果要在 /tmp
内创建临时目录,则 prefix
必须以平台特定的尾随路径分隔符(require('path').sep
)结尾。
// 新临时目录的父目录
const tmpDir = os.tmpdir();
// 这个方法是*不正确的*:
fs.mkdtemp(tmpDir, (err, directory) => {
if (err) throw err;
console.log(directory);
// 将打印类似于 `/tmpabc123` 的内容。
// 在文件系统根目录创建一个新的临时目录,而不是在 /tmp 目录中。
});
// 这个方法是*正确的*:
const { sep } = require('path');
fs.mkdtemp(`${tmpDir}${sep}`, (err, directory) => {
if (err) throw err;
console.log(directory);
// 将打印类似于 `/tmp/abc123` 的内容。
// 在 /tmp 目录中创建一个新的临时目录。
});
prefix
<string>options
<string> | <Object>encoding
<string> Default:'utf8'
callback
<Function>
Creates a unique temporary directory.
Generates six random characters to be appended behind a required
prefix
to create a unique temporary directory. Due to platform
inconsistencies, avoid trailing X
characters in prefix
. Some platforms,
notably the BSDs, can return more than six random characters, and replace
trailing X
characters in prefix
with random characters.
The created directory path is passed as a string to the callback's second parameter.
The optional options
argument can be a string specifying an encoding, or an
object with an encoding
property specifying the character encoding to use.
fs.mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, directory) => {
if (err) throw err;
console.log(directory);
// Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
});
The fs.mkdtemp()
method will append the six randomly selected characters
directly to the prefix
string. For instance, given a directory /tmp
, if the
intention is to create a temporary directory within /tmp
, the prefix
must end with a trailing platform-specific path separator
(require('path').sep
).
// The parent directory for the new temporary directory
const tmpDir = os.tmpdir();
// This method is *INCORRECT*:
fs.mkdtemp(tmpDir, (err, directory) => {
if (err) throw err;
console.log(directory);
// Will print something similar to `/tmpabc123`.
// A new temporary directory is created at the file system root
// rather than *within* the /tmp directory.
});
// This method is *CORRECT*:
const { sep } = require('path');
fs.mkdtemp(`${tmpDir}${sep}`, (err, directory) => {
if (err) throw err;
console.log(directory);
// Will print something similar to `/tmp/abc123`.
// A new temporary directory is created within
// the /tmp directory.
});