Connection Manager Release Notes

*** version 2.3.0 ***

* Custom Events are introduced in Connection Manager. These events -- for a

non-file upload transaction -- are:

* startEvent

* completeEvent

* successEvent

* failureEvent

* abortEvent

For transactions involving file upload with an HTML form, the events are:

* startEvent

* completeEvent

* uploadEvent

* abortEvent

* Event utility is a now Connection Manager dependency.

* abort() and isCallInProgress() are now functional for file upload

transactions.

* NOTE: The XHR implementation in Safari 2.0.4 has been confirmed to leak

memory.

* UPDATE: The XHR implementation in Safari 3.0 beta(and WebKit builds) now

appear to handle HTTP 204 responses correctly. XHR in Opera, as of 9.21, still

does not produce a valid HTTP status code with an HTTP 204 response.

*** version 2.2.2 ***

* No revisions.

*** version 2.2.1 ***

* setForm() will include the correct name-value of the HTML Submit button

clicked where multiple HTML Submit button options are present in an HTML form.

To enable this feature, include the Event utility source file as a dependency

before the Connection Manager source file.

* The XHR implementation in IE6 and IE7, Opera, and Safari do not properly

handle an HTTP 204 response. IE6/7 will instead return a Win error 1223.

handleTransactionResponse() will treat 1223 as an HTTP 204, and route the

response appropriately to the success callback. createResponseObject() will

normalize the response object's status and statusText values to 204 and "No

Content" respectively. However, no headers are returned.

Opera and Safari provide no discernable response with HTTP 204(e.g., response

object's properties are undefined). This response will trigger the failure

callback with a status of 0 and statusText of "communication failure".

*** version 2.2.0 ***

* initHeader() now accepts a third argument as a boolean. When set to true,

this specific header will automatically be sent with each transaction.

Otherwise, the header will be set and sent for the specific transaction only.

Example: initHeader('X-YUI-State','Beta', true); all transactions will send this

header.

* resetDefaultHeaders() will clear the default headers collection.

* All Connection Mananger transactions will broadcast the header: "X-Requested-

With: XMLHttpRequest".

* This can be turned off: YAHOO.util.Connect.setDefaultXhrHeader(false);

* The HTTP method argument in asyncRequest is now case-insensitive.

* uploadFile() will now correctly handle the absence of a callback object,

allowing the transaction to complete silently.

*** version 0.12.2 ***

* The Opera/Connection Manager concurrent object condition, described in version

0.12.0, no longer tests applies for Opera, version 9.10.

*** version 0.12.1 ***

* connection-debug.js corrected and synchronized with connection.js. Code

inconsistencies between the two files existed in 0.12.0.

*** version 0.12.0 ***

* When uploading files via setForm() and asyncRequest includes a POST data

argument, appendPostData() will create hidden input fields for each postData

label/value and append each field to the form object.

* setForm() returns the assembled label/value string of the parsed HTML form

fields.

* NOTE: Opera 9.02 does not allow for more than 12 concurrent Connection Manager

objects.

The following example creates 12 requests in a loop:

for(var n=0; n<=12; i++){

conn[n] = YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);

}

If n > 13, Opera 9.02 will crash. Connection manager objects count n must be <=

12 at all times. This condition was not present in Opera version 9.01.

This condition does not apply to other A-Grade browsers (

http://developer.yahoo.com/yui/articles/gbs/gbs_browser-chart.html)

*** version 0.11.3 ***

* YUI Event dependency for file uploading is now optional.

* uploadFile() now sets unique IDs for each file upload transaction to prevent

iframe collisions with parallel uploads.

* The callback object now has property responseXML to provide support for file

upload transactions that return an XML document.

* setForm() will verify if a select option value attribute is present and use

its value, including empty string, before using the text node value.

* Modified polling mechanism in handleReadyState() and

handleTransactionResponse() to prevent infinite polling if JavaScript errors

occur in the user-defined callback.

* createFrame() will now accept a boolean argument of true to set the frame

source to "javascript:false" to prevent IE from throwing security warnings in an

HTTPS environment.

* setHeader() now enumerates through the _http_header object using

hasOwnProperty() to prevent collisions with members added to Object via

prototype.

* If using setForm() and asyncRequest includes a POST data argument, the data

will be concatenated to the HTML form POST message.

*** version 0.11.2 ***

* No revisions.

*** version 0.11.1 ***

* uploadFile() now verifies the existence of callback.upload before invoking

callback, with or without object scope.

*** version 0.11.0 ***

* Each transaction can be defined with a timeout threshold, in milliseconds,

through the callback object. If the threshold is reached, and the transaction

hasn't yet completed, the transaction will call abort().

* abort() will now accept a callback object as the second argument. The

failure callback will receive a response object to indicate the transaction was

aborted.

* setForm() will now support file uploads by setting the second argument to

true (e.g., YAHOO.util.Connect.setForm(formObject, true). File upload does not

use the callback success or failure handler. Instead, it uses a new callback

object handler: upload.

* HTML form submit will no longer submit form fields without a defined name

attribute.

* The default POST header of 'Content-Type','application/x-www-form-urlencoded'

can be overridden by calling setDefaultPostHeader(false). This

will remove the default header from non-HTML form, POST submissions.

* setHeader() now enumerates through the _http_header object with

propertyIsEnumerable to prevent collisions with members added to Object via

prototype.

*** version 0.10.0 ***

* handleTransactionResponse() now treats the full HTTP 2xx range as a success

case, instead of just HTTP 200.

* To accommodate multiple field values in Mozilla/Firefox, multiple initHeader

calls with the same label will now result in the values concatenated to a

comma- delimited string value.

Example:

Setting Content-Type:'application/x-www-form-urlencoded' and Content-

Type:'text/xml' will result in Content-Type:'application/x-www-form-urlencoded,

text/xml'.

* Default polling interval lowered to 50ms.

* YAHOO.util.Connect.setPollingInterval() will allow you to set a polling

interval -- in milliseconds -- to override the default value.

* YAHOO.util.Connect.getResponseHeader[headerLabel] now supported as a response

object property to provide symmetry with the native XHR object's property.

Example:

YAHOO.util.Connect.getResponseHeader['Content-Length'] will return the value

for the Content-Length header, if the header is available.

* YAHOO.util.Connect.allResponseHeaders property renamed to

getAllResponseHeaders to provide symmetry with the native XHR object's

property.

* YAHOO.util.Connect.setForm() now supports HTTP GET as well as HTTP POST.

* YAHOO.util.Connect.setForm() now accepts an HTML form object as well as its

name attribute value.

* YAHOO.util.Connect.setForm() will not submit HTML form fields that are

disabled or do not have a name attribute value.

* [FIXED] Response exceptions result in infinite callback loop in

Mozilla/Firefox.

* [FIXED] YAHOO.util.Connect.abort() now properly clears polling interval.

* [FIXED] isCallInProgress() now verifies whether XHR instance still exists,

and returns false if the connection object is no longer available.

*** version 0.9.0 ***

* Initial release