What is an ASA file?

An ASA file is configuration file, created for ASP/ASP.NET projects. It contains declarations of variables, contains and functions that are meant to be accessible on Global level in the application. All the pages in the project can access these variables and functions, thus avoiding the requirement of rewriting these. One such example is the Global.asa page that is stored in the root directory to be accessible by other ASP website pages. Global.asa files are optional, but if used, each application can have only one Global.asa file.

ASA File Format - More Information

ASA files are plain text files with the following information.

  • Application events
  • Session events
  • <object> declarations
  • TypeLibrary declarations
  • the #include directive

ASA File Example

A Global.asa file could look something like this.

<script language="vbscript" runat="server">

sub Application_OnStart
'some code
end sub

sub Application_OnEnd
'some code
end sub

sub Session_OnStart
'some code
end sub

sub Session_OnEnd
'some code
end sub

</script>

Key Characteristics of the ASA File Format

CharacteristicDescription
File Extension.asa
Context-Dependent InterpretationThe meaning and structure of an ASA file are entirely determined by the software that created it. A web server interprets it as configuration, while 3D software sees it as model data.
Plain Text or Binary StructureWeb development ASA files are plain text, while 3D model ASA files are typically binary formats requiring specialized software.
Software-Specific RequirementsCannot be opened universally; requires the appropriate creating application or compatible software for proper access.
Critical FunctionalityIn web applications, Global.asa is essential for session management and application initialization.
Declining UsageAs ASP classic has been largely superseded by ASP.NET, the web configuration use of ASA files has diminished but remains important for legacy system maintenance.

FAQ

Q1: What program opens an ASA file?

A: It depends on the file type—use a text editor for web configuration files or Astronomical SARA software for 3D models.

Q2: Is Global.asa still used in modern web development?

A: Primarily in maintaining legacy ASP classic applications; most modern development uses ASP.NET’s Global.asax.

Q3: Can I convert an ASA 3D model to another format?

A: Yes, using 3D conversion tools or software that supports both ASA and your target format (like OBJ or FBX).

Q4: Why can’t I open my ASA file in a text editor?

A: Your file is likely a binary 3D model format, not a text-based configuration file.

Q5: Are ASA files dangerous or malicious?

A: The format itself isn’t dangerous, but like any file, it could be malicious if created by harmful software—only open files from trusted sources.

References

See Also