that is used to embed File Downloader to the HTML page. This
topic describes how to use this script.
In this topic:
inserting ActiveX controls? The main reason is that this approach lets you avoid the problem caused
by the Internet Explorer security update
912945. This update causes all ActiveX controls inserted via the OBJECT tag to be "activated" by
the user (with a mouse click or by pressing a key). This noticeably reduces usability. However,
iuembed.js implements a workaround that allows avoiding
This script is used in the following way:
iuembed.jsfile to your HTML page.
You can find
iuembed.js in the root folder of the
File Downloader SDK installation folder.
iuembed.jsto the Page
To be able to use
iuembed.js, it is necessary to link
using the SCRIPT tag with the src attribute set to the URL of
To embed File Downloader into a Web page, you need to do at least the following:
Here is a short example of adding File Downloader to a Web page:
Do not confuse the FileDownloaderWriter class from
iuembed.js with the FileDownloader control. Do not try to call any methods or properties of FileDownloader from FileDownloaderWriter
and vice versa.
The FileDownloaderWriter constructor has three arguments: an ID of the control, a width, and a height. You can change these values later using appropriate properties.
Full list of FileDownloaderWriter members can be found at the end of this topic.
To initialize parameters of File Downloader you should use the addParam method of the FileDownloaderWriter class instance before calling writeHtml.
The addParam method takes two arguments: a name of the property and its value.
The following example should make it clear:
It takes a while to download and install File Downloader. After download completes, the browser requires the user to click a button on the security dialog. Furthermore, if File Downloader is installed on Windows XP with Service Pack 2, the user should also click an information bar before the security dialog appears.
It may be quite confusing for the user. They may misunderstand installation instructions and reject installation when security dialog pops up.
In this case, displaying installation instructions is a good idea.
iuembed.js exposes a number of properties that enable this.
The instructionsEnabled property specifies whether to display instructions or not. Set it to true to make instructions appear. The instructionsCommon property specifies an HTML code for those instructions which are common for all client platforms. The instructionsWinXPSP2 and instructionsNotWinXPSP2 values are appended to the common instructions depending on the client platform (Windows XP with Service Pack 2 or other platforms respectively).
This code snippet demonstrates how to use these properties:
fd.instructionsEnabled=true; fd.instructionsCommon="File Downloader ActiveX control is necessary to " + "download files quickly and easily. You will be able to select required " + "files in a user-friendly interface and simply click the \"Download\" " + "button. Installation will take up to few minutes, please be patient. To " + "install File Downloader, "; fd.instructionsNotWinXPSP2="please reload the page and click the \"Yes\" " + "button when you see the control installation dialog." fd.instructionsWinXPSP2="please click the Information Bar. After page reloads " + "click \"Yes\" when you see the control installation dialog.";
File Downloader provides a number of useful events which you can handle. To add event listeners do the following:
This example demonstrates how this should look like:
You must pass the name of the function, not the reference to it. In other
words, do not forget to enclose the name in quotation marks. So
is incorrect, but
See the full list of all FileDownloader events in the FileDownloader Events reference section.
iuembed.js script contains a special
function - getFileDownloader. It takes a single argument - the
ID of the control, which you want to reference (for example, specified when creating an instance of
FileDownloaderWriter), and returns a reference to the control.
Here is an example of obtaining a referenece:
var downloader = getFileDownloader("FileDownloader1");
Sometimes you need to modify File Downloader properties after initialization. The typical situation is when you need to change the file list in response to some user actions.
To do that, you should get a reference to the FileDownloader control as described above and modify the value of a required property.
The syntax of runtime property modification is the following:
object.setPropertyName(value), where PropertyName is
a name of the property as specified in the FileDownloader Properties reference.
To read a property value, use
The code snippet below shows how to work with properties after initialization:
var downloader = getFileDownloader("FileDownloader1"); downloader.setFileList(downloader.getFileList());
To call methods of FileDownloader, use the same approach as you use for properties: get a reference to the FileDownloader instance and call methods:
object.MethodName(argument1, argument2, ...), where
MethodName is a name of the method as specified in the FileDownloader Methods reference.
Here is a code example:
var downloader = getFileDownloader("FileDownloader1"); downloader.DownloadFileList();
Quite often it is necessary to work with the File Downloader control when you are sure that the page has been fully loaded and the control itself has been completely created and initialized.
That is why
iuembed.js exposes a special event, which
is raised when the page is loaded, and the control is completely ready to be used. This event
handler can be assigned to the fullPageLoadListenerName property of
FileDownloaderWriter as follows:
iuembed.js exposes only one class, FileDownloaderWriter, which corresponds to the only class of File Downloader, FileDownloader.
Adds a parameter with the specified name and value. The settings take effect when the writeHtml or getHtml method is run.
You should specify the name of the function, not the reference to this function.
Verifies whether ActiveX control is installed. If yes, it returns true; otherwise it returns false.
Generates the HTML code which will embed File Downloader and returns it as a string. It will write all parameters added with the addParam method and append all event handlers specified by the addEventListener method.
Generates the HTML code, which will embed File Downloader, and writes this code directly into the page. It will write all parameters added with the addParam method and append all event handlers specified by the addEventListener method.
The URL that specifies where to download the ActiveX version of File Downloader from. It is an analogue of the
The URL that specifies where to download the 64-bit ActiveX version of File Downloader from. It is an analogue of the
Switch that specifies whether to use the ActiveX version of File Downloader.
The minimum required version of the ActiveX version of File Downloader.
The subversions should be separated only by commas (unlike the Java version). For example,
The URL that specifies the folder where to download the Java version of File Downloader from.
Name of the
Switch that specifies whether to use the Java version of File Downloader.
The minimum required version of the Java version of File Downloader.
The subversions should be separated only by dots (unlike ActiveX version). For example,
|height||N/A (provided in the constructor)||
Height of the control. You should provide an integer number. Syntax like
|id||N/A (provided in the constructor)||
ID of the control that is used to get a reference with the help of the getFileDownloader function.
Value that specifies whether to display instructionsCommon, instructionsNotWinXPSP2, and instructionsWinXPSP2 when File Downloader fails to be installed.
|instructionsCommon||See code snippet above||
Common part of instructions displayed during download failure (regardless of the Windows version). Can contain any HTML code.
|instructionsNotWinXPSP2||See code snippet above||
Part of instructions which is displayed if the current Windows is not Windows XP with Service Pack 2. Appended to the instructionsCommon string. Can contain any HTML code.
|instructionsWinXPSP2||See code snippet above||
Part of instructions which is displayed if the current Windows is Windows XP with Service Pack 2. Appended to the instructionsCommon string. Can contain any HTML code.
|noFileSystemAccessInSafari||<p>The browser does not allow File Downloader to access the local file system. To enable the access perform the following steps:</p><ul><li style='margin-top:10px'>Go to <b>Safari</b>→<b>Preferences</b>, choose the <b>Security</b> tab, and click <b>Manage Website Settings</b>.</li><li style='margin-top:10px'>Select <b>Java</b> in the left column, click on the dropdown box next to the <b>[name]</b> website, and choose <b>Run in Unsafe Mode</b>.</li></ul>||
The message which states that File Downloader cannot access the local file system due to Safari security settings. It can contain the following placeholder:
|width||N/A (provided in the constructor)||
Width of the control. You should provide an integer number. Syntax like
Returns a reference to the control with the specified ID.
When private-label version is used, you need to customize the following properties (that should not be changed in the standard version):
|activeXControlCodeBase||Name of the
|activeXControlCodeBase64||Name of the x64
|activeXClassId||CLSID of the ActiveX control.|
|activeXProgId||PROGID of the ActiveX control.|
|javaAppletJarFileName||Name of the
|javaAppletClassName||Java applet class name.|
The following code snippet demonstrates how to use these properties: