208 lines
7.4 KiB
Markdown
208 lines
7.4 KiB
Markdown
# session
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The `session` object is a property of [`webContents`](web-contents.md) which is
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a property of [`BrowserWindow`](browser-window.md). You can access it through an
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instance of `BrowserWindow`. For example:
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```javascript
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var BrowserWindow = require('browser-window');
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var win = new BrowserWindow({ width: 800, height: 600 });
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win.loadUrl("http://github.com");
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var session = win.webContents.session
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```
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## Events
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### Event: 'will-download'
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* `event` Event
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* `item` [DownloadItem](download-item.md)
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* `webContents` [WebContents](web-contents.md)
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Fired when Electron is about to download `item` in `webContents`.
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Calling `event.preventDefault()` will cancel the download.
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```javascript
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session.on('will-download', function(event, item, webContents) {
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event.preventDefault();
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require('request')(item.getUrl(), function(data) {
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require('fs').writeFileSync('/somewhere', data);
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});
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});
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```
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## Methods
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The `session` object has the following methods:
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### `session.cookies`
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The `cookies` gives you ability to query and modify cookies. For example:
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```javascript
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var BrowserWindow = require('browser-window');
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var win = new BrowserWindow({ width: 800, height: 600 });
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win.loadUrl('https://github.com');
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win.webContents.on('did-finish-load', function() {
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// Query all cookies.
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win.webContents.session.cookies.get({}, function(error, cookies) {
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if (error) throw error;
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console.log(cookies);
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});
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// Query all cookies associated with a specific url.
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win.webContents.session.cookies.get({ url : "http://www.github.com" },
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function(error, cookies) {
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if (error) throw error;
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console.log(cookies);
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});
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// Set a cookie with the given cookie data;
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// may overwrite equivalent cookies if they exist.
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win.webContents.session.cookies.set(
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{ url : "http://www.github.com", name : "dummy_name", value : "dummy"},
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function(error, cookies) {
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if (error) throw error;
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console.log(cookies);
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});
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});
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```
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### `session.cookies.get(details, callback)`
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`details` Object, properties:
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* `url` String - Retrieves cookies which are associated with `url`.
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Empty implies retrieving cookies of all urls.
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* `name` String - Filters cookies by name
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* `domain` String - Retrieves cookies whose domains match or are subdomains of
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`domains`
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* `path` String - Retrieves cookies whose path matches `path`
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* `secure` Boolean - Filters cookies by their Secure property
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* `session` Boolean - Filters out session or persistent cookies.
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* `callback` Function - function(error, cookies)
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* `error` Error
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* `cookies` Array - array of `cookie` objects, properties:
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* `name` String - The name of the cookie.
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* `value` String - The value of the cookie.
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* `domain` String - The domain of the cookie.
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* `host_only` String - Whether the cookie is a host-only cookie.
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* `path` String - The path of the cookie.
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* `secure` Boolean - Whether the cookie is marked as Secure (typically HTTPS).
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* `http_only` Boolean - Whether the cookie is marked as HttpOnly.
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* `session` Boolean - Whether the cookie is a session cookie or a persistent
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cookie with an expiration date.
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* `expirationDate` Double - (Option) The expiration date of the cookie as
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the number of seconds since the UNIX epoch. Not provided for session
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cookies.
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### `session.cookies.set(details, callback)`
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`details` Object, properties:
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* `url` String - Retrieves cookies which are associated with `url`
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* `name` String - The name of the cookie. Empty by default if omitted.
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* `value` String - The value of the cookie. Empty by default if omitted.
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* `domain` String - The domain of the cookie. Empty by default if omitted.
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* `path` String - The path of the cookie. Empty by default if omitted.
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* `secure` Boolean - Whether the cookie should be marked as Secure. Defaults to
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false.
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* `session` Boolean - Whether the cookie should be marked as HttpOnly. Defaults
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to false.
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* `expirationDate` Double - The expiration date of the cookie as the number of
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seconds since the UNIX epoch. If omitted, the cookie becomes a session cookie.
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* `callback` Function - function(error)
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* `error` Error
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### `session.cookies.remove(details, callback)`
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* `details` Object, proprties:
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* `url` String - The URL associated with the cookie
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* `name` String - The name of cookie to remove
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* `callback` Function - function(error)
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* `error` Error
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### `session.clearCache(callback)`
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* `callback` Function - Called when operation is done
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Clears the session’s HTTP cache.
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### `session.clearStorageData([options, ]callback)`
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* `options` Object (optional), proprties:
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* `origin` String - Should follow `window.location.origin`’s representation
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`scheme://host:port`.
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* `storages` Array - The types of storages to clear, can contain:
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`appcache`, `cookies`, `filesystem`, `indexdb`, `local storage`,
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`shadercache`, `websql`, `serviceworkers`
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* `quotas` Array - The types of quotas to clear, can contain:
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`temporary`, `persistent`, `syncable`.
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* `callback` Function - Called when operation is done.
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Clears the data of web storages.
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### `session.setProxy(config, callback)`
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* `config` String
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* `callback` Function - Called when operation is done.
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Parses the `config` indicating which proxies to use for the session.
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```
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config = scheme-proxies[";"<scheme-proxies>]
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scheme-proxies = [<url-scheme>"="]<proxy-uri-list>
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url-scheme = "http" | "https" | "ftp" | "socks"
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proxy-uri-list = <proxy-uri>[","<proxy-uri-list>]
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proxy-uri = [<proxy-scheme>"://"]<proxy-host>[":"<proxy-port>]
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For example:
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"http=foopy:80;ftp=foopy2" -- use HTTP proxy "foopy:80" for http://
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URLs, and HTTP proxy "foopy2:80" for
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ftp:// URLs.
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"foopy:80" -- use HTTP proxy "foopy:80" for all URLs.
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"foopy:80,bar,direct://" -- use HTTP proxy "foopy:80" for all URLs,
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failing over to "bar" if "foopy:80" is
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unavailable, and after that using no
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proxy.
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"socks4://foopy" -- use SOCKS v4 proxy "foopy:1080" for all
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URLs.
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"http=foopy,socks5://bar.com -- use HTTP proxy "foopy" for http URLs,
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and fail over to the SOCKS5 proxy
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"bar.com" if "foopy" is unavailable.
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"http=foopy,direct:// -- use HTTP proxy "foopy" for http URLs,
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and use no proxy if "foopy" is
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unavailable.
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"http=foopy;socks=foopy2 -- use HTTP proxy "foopy" for http URLs,
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and use socks4://foopy2 for all other
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URLs.
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```
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### `session.setDownloadPath(path)`
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* `path` String - The download location
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Sets download saving directory. By default, the download directory will be the
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`Downloads` under the respective app folder.
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### `session.enableNetworkEmulation(options)`
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* `options` Object
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* `offline` Boolean - Whether to emulate network outage.
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* `latency` Double - RTT in ms
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* `downloadThroughput` Double - Download rate in Bps
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* `uploadThroughput` Double - Upload rate in Bps
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Emulates network with the given configuration for the `session`.
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### `session.disableNetworkEmulation`
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Disables any network emulation already active for the `session`. Resets to
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the original network configuration.
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