ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with the file system
By default, Flash Player does not attempt to send a test upload, although you can override this default by passing a value
of true as the third parameter to the upload() method. The purpose of the test upload is to check whether the actual
file upload will be successful and that server authentication, if required, will succeed.
Note: A test upload occurs only on Windows-based Flash Players at this time.
The server script that handles the file upload should expect an HTTP POST request with the following elements:
Content-Type with a value of multipart/form-data.
Content-Disposition with a name attribute set to “Filedata” and a filename attribute set to the name of the
original file. You can specify a custom name attribute by passing a value for the uploadDataFieldName parameter
in the FileReference.upload() method.
The binary contents of the file.
Here is a sample HTTP POST request:
POST /handler.asp HTTP/1.1
Accept: text/*
Content-Type: multipart/form-data;
boundary=----------Ij5ae0ae0KM7GI3KM7ei4cH2ei4gL6
User-Agent: Shockwave Flash
Host: www.mydomain.com
Content-Length: 421
Connection: Keep-Alive
Cache-Control: no-cache
------------Ij5ae0ae0KM7GI3KM7ei4cH2ei4gL6
Content-Disposition: form-data; name="Filename"
sushi.jpg
------------Ij5ae0ae0KM7GI3KM7ei4cH2ei4gL6
Content-Disposition: form-data; name="Filedata"; filename="sushi.jpg"
Content-Type: application/octet-stream
Test File
------------Ij5ae0ae0KM7GI3KM7ei4cH2ei4gL6
Content-Disposition: form-data; name="Upload"
Submit Query
------------Ij5ae0ae0KM7GI3KM7ei4cH2ei4gL6
(actual file data,,,)
The following sample HTTP POST request sends three POST variables: api_sig, api_key, and auth_token, and uses
a custom upload data field name value of "photo":
Last updated 6/6/2012
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