ASP Document Object Model
- The Request object supplies information from a client visitor
(Form, QueryString, ServerVariables, Cookies, ClientCertificate).
Its TotalBytes property provides how much data is transferred each time.
- The Response object contains methods for building a response to the client
(End, Redirect, AddHeader, Write, BinaryWrite, Clear, Flush) and the Cookies collection.
Its properties are Buffer, Charset, Expires, ExpiresAbsolute, CacheControl, ContentType, Pics rating, Status line text.
IIS5 added AppendToLog.
- ObjectContext method SetAbort triggers the OnTransactionAbort event.
SetComplete transactions triggers the OnTransactionCommit event.
- The ASPError object (new since IIS5) exposes properties of the last error
when Server.GetLastError is called, such as the Category and shorter Description or
longer ASPDescription of the error Source and
which Line and Column in the File causing the error.
- The Server object also has methods to do HTMLEncode, URLEncode, and MapPath.
Its ScriptTimeout property manages its lifetime.
- Application methods Lock and UnLock control availability of objects in
its Contents and StaticObjects collections.
Variables available to all users are defined with Application_OnStart and _OnEnd events.
- The Session object holds the CodePage, LCID, SessionId, and Timeout properties pertaining to a particular visitor.
Like the Application object, Contents and StaticObjects collections for each user session
are managed with Abandon and Contents.Remove methods.
Variables available to each session is defined with Session_OnStart and _OnEnd events.
objRecordset.Fields("DATE") = Now()
objRecordset.Fields("HTTP_USER_AGENT") = Request.ServerVariables("HTTP_USER_AGENT")
objRecordset.Fields("HTTP_REFERER") = Request.ServerVariables("HTTP_REFERER")
objRecordset.Fields("QUERY_STRING") = Request.ServerVariables("QUERY_STRING")
objRecordset.Fields("REMOTE_ADDR") = Request.ServerVariables("REMOTE_ADDR")
objRecordset.Fields("REMOTE_HOST") = Request.ServerVariables("REMOTE_HOST")
objRecordset.Fields("SERVER_PORT") = Request.ServerVariables("SERVER_PORT")
objRecordset.Fields("URL") = Request.ServerVariables("URL")
CGI coding
print "QUERY_STRING ", $ENV{'REMOTE_ADDR'}, "\n";
DOM
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Active Server Pages Development Tools
To improve String Handling Performance in ASP James Musson in this March 2003 article
compares the performance of issuing several Response.Writes (the quickest) versus
string concantenation (the slowest). He also proposes an efficient StringBuilder method.
Unlike .htm files, the full http:// reference must be used to invoke ASP files
through a web application server because the whole point of using ASP files is to dynamically generate
ASP Server Variables for this machine/session
While Loop Programming
