IO Library

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IO Library

IO related functions.

Usage

Add the following into your build.gradle file:

dependencies {
  include 'com.enonic.xp:lib-io:${xpVersion}'
}

In your JavaScript controller, add a require statement:

var ioLib = require('/lib/xp/io');

You are now free to use the library functionality.

Functions

getMimeType

Returns the mime-type from a name or extension.

Parameters

Name Type Description

name

string

Name of file or extension

Returns

string : mime-type from a name or extension.

Example

// Returns mime-type for a file name.
var type = ioLib.getMimeType('myfile.txt');
log.info('Mime type is %s', type);

getResource

Looks up a resource.

Parameters

Name Type Description

key

string

Resource key to look up

Returns

Resource : Resource reference.

Examples

// Returns a file by name.
var res1 = ioLib.getResource('/lib/xp/examples/io/sample.txt');
var exists = res1.exists();
var size = res1.getSize();
var stream = res1.getStream();
// Returns a file by reference.
var res2 = ioLib.getResource(resolve('./sample.txt'));
if (res2.exists()) {
    log.info('Resource exists');
}

getSize

Returns the size of a stream.

Parameters

Name Type Description

stream

Stream to get size of

Returns

number : Returns the size of a stream.

Example

// Returns the size of a stream.
var size = ioLib.getSize(stream);
log.info('Stream size is %s bytes', size);

newStream

Returns a new stream from a string.

Parameters

Name Type Description

text

string

String to create a stream of

Returns

  • : A new stream.

Example

// Creates a new stream from a string.
var stream = ioLib.newStream('Hello World');

processLines

Process lines from a stream.

Parameters

Name Type Description

stream

Stream to read lines from

func

function

Callback function to be called for each line

Example

var num = 0;

// Process lines from stream.
ioLib.processLines(stream, function (line) {
    num++;
    log.info('Line %s: %s', num, line);
});

readLines

Read lines from a stream.

Parameters

Name Type Description

stream

Stream to read lines from

Returns

Array.<string> : Lines as an array.

Example

// Reads lines from stream.
var lines = ioLib.readLines(stream);
log.info('Num lines: %s', lines.length);

readText

Read text from a stream.

Parameters

Name Type Description

stream

Stream to read text from

Returns

string : The text read from stream or string.

Example

// Reads text from stream.
var text = ioLib.readText(stream);
log.info('Text: %s', text);

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