69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
var AWS = require('../core');
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/**
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* Represents credentials from a JSON file on disk.
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* If the credentials expire, the SDK can {refresh} the credentials
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* from the file.
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*
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* The format of the file should be similar to the options passed to
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* {AWS.Config}:
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*
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* ```javascript
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* {accessKeyId: 'akid', secretAccessKey: 'secret', sessionToken: 'optional'}
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* ```
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*
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* @example Loading credentials from disk
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* var creds = new AWS.FileSystemCredentials('./configuration.json');
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* creds.accessKeyId == 'AKID'
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*
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* @!attribute filename
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* @readonly
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* @return [String] the path to the JSON file on disk containing the
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* credentials.
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* @!macro nobrowser
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*/
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AWS.FileSystemCredentials = AWS.util.inherit(AWS.Credentials, {
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/**
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* @overload AWS.FileSystemCredentials(filename)
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* Creates a new FileSystemCredentials object from a filename
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*
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* @param filename [String] the path on disk to the JSON file to load.
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*/
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constructor: function FileSystemCredentials(filename) {
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AWS.Credentials.call(this);
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this.filename = filename;
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this.get(function() {});
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},
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/**
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* Loads the credentials from the {filename} on disk.
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*
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* @callback callback function(err)
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* Called after the JSON file on disk is read and parsed. When this callback
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* is called with no error, it means that the credentials information
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* has been loaded into the object (as the `accessKeyId`, `secretAccessKey`,
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* and `sessionToken` properties).
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* @param err [Error] if an error occurred, this value will be filled
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* @see get
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*/
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refresh: function refresh(callback) {
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if (!callback) callback = AWS.util.fn.callback;
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try {
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var creds = JSON.parse(AWS.util.readFileSync(this.filename));
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AWS.Credentials.call(this, creds);
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if (!this.accessKeyId || !this.secretAccessKey) {
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throw AWS.util.error(
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new Error('Credentials not set in ' + this.filename),
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{ code: 'FileSystemCredentialsProviderFailure' }
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);
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}
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this.expired = false;
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callback();
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} catch (err) {
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callback(err);
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}
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}
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});
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