asp classic error resume next
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Classic Asp Error Handlingjust like you, helping each other. Join them; it only takes a minute: Sign up using “on error resume next” in classic ASP, and how to handle errors up vote 6 down vote favorite Good day all, classic asp on error resume next example I would like to ask a thing about on error resume next let's assume we have a loop to navigate through a recordset like: Do while not rs.EOF query = "UPDATE ...." conn.execute(query) rs.movenext loop i would like to be sure the UPDATE is going good, and i would like to check if there is some problems, so I have put a debugging features in the code like: Do while not rs.EOF query = asp net on error resume next "UPDATE ...." on error resume next conn.execute(query) If Err.Number <> 0 Then Response.write(Err.Number) response.write("
") response.write(Err.description) response.write("
") response.write(query) response.write("
") end if on error goto 0 rs.movenext loop the question is : during a loop, if it encounters an error, the next cycle will the error be there (and so triggers again the error block) ? or on error goto 0 will clear the Err object? in other words, will it works as a error handling? asp-classic vbscript error-handling share|improve this question edited Jul 3 '13 at 10:51 Alex K. 106k16146194 asked Jul 3 '13 at 10:43 Matteo Bononi 'peorthyr' 76451749 add a comment| 3 Answers 3 active oldest votes up vote 5 down vote accepted VBScript resets the error on goto 0: on error resume next i = 1 / 0 WScript.echo( err.number ) '' prints 11 (div by 0) on error goto 0 WScript.echo( err.number ) '' prints 0 (no error) There is also the explicit err.clear(). share|improve this answer answered Jul 3 '13 at 10:49 Alex K. 106k16146194 oh, nice to know the err.clear(), thanks ! :D –Matteo Bononi 'peorthyr' Jul 3 '13 at 10:53 add a comment| up vote 2 down vote The correct code to use is Err.Clear I have tested it with the following code <%on error resume next response.write (p(10)) Response.write(Err.Number) response.write("
") response.write(Err.description) respo
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an error occurs 'Do somethign that might cause an error If Err.number <> 0 Then ' check if any errors http://www.dotnetdawgs.com/post/ASp-Classic-How-To-Use-On-Error-Resume-Next.aspx were raised and handle them 'Handle the Error response.write(Err.Description) End If On Error GoTo 0 ' turn off resume next 5e4aaed3-49dd-4e0e-bb35-c74f4269a1da|0|.0 Tags: on error resume next, asp classic debugging https://www.owasp.org/index.php/Reviewing_Code_for_Error_Handling ASP Classic E-mail | Kick it! | DZone it! | del.icio.us Permalink | Comments (0) | Post RSS Related posts.NET State DropDown 1:
.NET 4 Error handling can be done in three ways in .NET 4.1 Classic ASP 5 Vulnerable Patterns for Error Handling 5.1 Page_Error 5.2 Global.asax 5.3 Web.config 6 Best Practices for Error Handling 6.1 Try & Catch (Java/ .NET) 6.2 Releasing resources and good housekeeping 6.3 Centralised exception handling (Struts Example) Error, Exception Handling & Logging An important aspect of secure application development is to prevent information leakage. Error messages give an attacker great insight into the inner workings of an application. The purpose of reviewing the Error Handling code is to assure the application fails safely under all possible error conditions, expected and unexpected. No sensitive information is presented to the user when an error occurs. For example SQL injection is much tougher to successfully pull off without some healthy error messages. It lessens the attack footprint and our attacker would have to resort to use “blind SQL injection” which is more difficult and time consuming. A well-planned error/exception handling strategy is important for three reasons: Good error handling does not give an attacker any information which is a means to an end, attacking the application A proper centralised error strategy is easier to maintain and reduces the chance of any uncaught errors “Bubbling up” to the front end of an application. Information leakage can lead to social engineering exploits. Some development languages provide checked exceptions which mean that the compiler shall complain if an exception for a particular API call is not caught Java and C# are good examples of this. Languages like C++ and C do not provide this safety net. Languages with checked exception handling still are prone to information leakage as not all types of error are checked for. When an exception or error is thrown we also need to log this occurrenc