SpamFilter (stSoftware API)

java.lang.Object
- com.ecyrd.jspwiki.filters.BasicPageFilter
- - com.ecyrd.jspwiki.filters.SpamFilter

All Implemented Interfaces:

PageFilter
```
public class SpamFilter
extends BasicPageFilter
```
This is Herb, the JSPWiki spamfilter that can also do choke modifications. Parameters:
- wordlist - Page name where the regexps are found. Use [{SET spamwords='regexp list separated with spaces'}] on that page. Default is "SpamFilterWordList".
- blacklist - The name of an attachment containing the list of spam patterns, one per line. Default is "SpamFilterWordList/blacklist.txt"
- errorpage - The page to which the user is redirected. Has a special variable $msg which states the reason. Default is "RejectedMessage".
- pagechangesinminute - How many page changes are allowed/minute. Default is 5.
- similarchanges - How many similar page changes are allowed before the host is banned. Default is 2. (since 2.4.72)
- bantime - How long an IP address stays on the temporary ban list (default is 60 for 60 minutes).
- maxurls - How many URLs can be added to the page before it is considered spam (default is 5)
- akismet-apikey - The Akismet API key (see akismet.org)
- ignoreauthenticated - If set to "true", all authenticated users are ignored and never caught in SpamFilter
- captcha - Sets the captcha technology to use. Current allowed values are "none" and "asirra".
- strategy - Sets the filtering strategy to use. If set to "eager", will stop at the first probable match, and won't consider any other tests. This is the default, as it's considerably lighter. If set to "score", will go through all of the tests and calculates a score for the spam, which is then compared to a filter level value.
Please see the default editors/plain.jsp for examples on how the SpamFilter integrates with the editor system.

Changes by admin users are ignored in any case.
Since:

2.1.112

Field Summary

Fields
Modifier and Type	Field and Description
`static java.lang.String`	`PROP_AKISMET_API_KEY` The filter property name for specifying the Akismet API-key.
`static java.lang.String`	`PROP_BANTIME` The filter property name for specifying how long a host is banned.
`static java.lang.String`	`PROP_BLACKLIST` The filter property name for the attachment containing the blacklist.
`static java.lang.String`	`PROP_CAPTCHA` The filter property name for specifying which captcha technology should be used.
`static java.lang.String`	`PROP_ERRORPAGE` The filter property name for the page to which you are directed if Herb rejects your edit.
`static java.lang.String`	`PROP_FILTERSTRATEGY` The filter property name for specifying which filter strategy should be used.
`static java.lang.String`	`PROP_IGNORE_AUTHENTICATED` The filter property name for specifying whether authenticated users should be ignored.
`static java.lang.String`	`PROP_MAXURLS` The filter property name for specifying how many URLs can any given edit contain.
`static java.lang.String`	`PROP_PAGECHANGES` The filter property name for specifying how many changes is any given IP address allowed to do per minute.
`static java.lang.String`	`PROP_SIMILARCHANGES` The filter property name for specifying how many similar changes are allowed before a host is banned.
`static java.lang.String`	`PROP_WORDLIST` The filter property name for specifying the page which contains the list of spamwords.
`static java.lang.String`	`STRATEGY_EAGER` The string specifying the "eager" strategy.
`static java.lang.String`	`STRATEGY_SCORE` The string specifying the "score" strategy.

Fields inherited from class com.ecyrd.jspwiki.filters.BasicPageFilter
m_engine

Constructor Summary

Constructors
Constructor and Description

SpamFilter()

Constructors
Constructor and Description
`SpamFilter()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static boolean`	`checkHash(WikiContext context, PageContext pageContext)` This method checks if the hash value is still valid, i.e.
`static java.lang.String`	`getBotFieldName()` Returns a static string which can be used to detect spambots which just wildly fill in all the fields.
`static java.lang.String`	`getHashFieldName(HttpServletRequest request)` Returns the name of the hash field to be used in this request.
`static java.lang.String`	`getSpamHash(WikiPage page, HttpServletRequest request)` This method is used to calculate an unique code when submitting the page to detect edit conflicts.
`void`	`initialize(WikiEngine engine, java.util.Properties properties)` If you override this, you should call super.initialize() first.
`static java.lang.String`	`insertInputFields(PageContext pageContext)` This helper method adds all the input fields to your editor that the SpamFilter requires to check for spam.
`boolean`	`isValidUserProfile(WikiContext context, UserProfile profile)` Checks whether the UserProfile matches certain checks.
`java.lang.String`	`preSave(WikiContext context, java.lang.String content)` This method is called before the page has been saved to the PageProvider.

Methods inherited from class com.ecyrd.jspwiki.filters.BasicPageFilter
destroy, postSave, postTranslate, preTranslate

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - PROP_WORDLIST
```
public static final java.lang.String PROP_WORDLIST
```
    The filter property name for specifying the page which contains the list of spamwords. Value is "wordlist".
    
    See Also:
    
    Constant Field Values
  - PROP_ERRORPAGE
```
public static final java.lang.String PROP_ERRORPAGE
```
    The filter property name for the page to which you are directed if Herb rejects your edit. Value is "errorpage".
    
    See Also:
    
    Constant Field Values
  - PROP_PAGECHANGES
```
public static final java.lang.String PROP_PAGECHANGES
```
    The filter property name for specifying how many changes is any given IP address allowed to do per minute. Value is "pagechangesinminute".
    
    See Also:
    
    Constant Field Values
  - PROP_SIMILARCHANGES
```
public static final java.lang.String PROP_SIMILARCHANGES
```
    The filter property name for specifying how many similar changes are allowed before a host is banned. Value is "similarchanges".
    
    See Also:
    
    Constant Field Values
  - PROP_BANTIME
```
public static final java.lang.String PROP_BANTIME
```
    The filter property name for specifying how long a host is banned. Value is "bantime".
    
    See Also:
    
    Constant Field Values
  - PROP_BLACKLIST
```
public static final java.lang.String PROP_BLACKLIST
```
    The filter property name for the attachment containing the blacklist. Value is "blacklist".
    
    See Also:
    
    Constant Field Values
  - PROP_MAXURLS
```
public static final java.lang.String PROP_MAXURLS
```
    The filter property name for specifying how many URLs can any given edit contain. Value is "maxurls"
    
    See Also:
    
    Constant Field Values
  - PROP_AKISMET_API_KEY
```
public static final java.lang.String PROP_AKISMET_API_KEY
```
    The filter property name for specifying the Akismet API-key. Value is "akismet-apikey".
    
    See Also:
    
    Constant Field Values
  - PROP_IGNORE_AUTHENTICATED
```
public static final java.lang.String PROP_IGNORE_AUTHENTICATED
```
    The filter property name for specifying whether authenticated users should be ignored. Value is "ignoreauthenticated".
    
    See Also:
    
    Constant Field Values
  - PROP_CAPTCHA
```
public static final java.lang.String PROP_CAPTCHA
```
    The filter property name for specifying which captcha technology should be used. Value is "captcha".
    
    See Also:
    
    Constant Field Values
  - PROP_FILTERSTRATEGY
```
public static final java.lang.String PROP_FILTERSTRATEGY
```
    The filter property name for specifying which filter strategy should be used. Value is "strategy".
    
    See Also:
    
    Constant Field Values
  - STRATEGY_EAGER
```
public static final java.lang.String STRATEGY_EAGER
```
    The string specifying the "eager" strategy. Value is "eager".
    
    See Also:
    
    Constant Field Values
  - STRATEGY_SCORE
```
public static final java.lang.String STRATEGY_SCORE
```
    The string specifying the "score" strategy. Value is "score".
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SpamFilter
```
public SpamFilter()
```
- Method Detail
  - initialize
```
public void initialize(WikiEngine engine,
                       java.util.Properties properties)
```
    If you override this, you should call super.initialize() first. Is called whenever the a new PageFilter is instantiated and reset.
    
    Specified by:
    
    initialize in interface PageFilter
    
    Overrides:
    
    initialize in class BasicPageFilter
    
    Parameters:
    
    engine - The WikiEngine whic owns this PageFilter
    
    properties - The properties ripped from filters.xml.
  - preSave
```
public java.lang.String preSave(WikiContext context,
                                java.lang.String content)
                         throws RedirectException
```
    This method is called before the page has been saved to the PageProvider.
    
    Specified by:
    
    preSave in interface PageFilter
    
    Overrides:
    
    preSave in class BasicPageFilter
    
    Parameters:
    
    context - The WikiContext
    
    content - The wikimarkup that the user just wanted to save.
    
    Returns:
    
    The modified wikimarkup
    
    Throws:
    
    RedirectException
  - getBotFieldName
```
public static java.lang.String getBotFieldName()
```
    Returns a static string which can be used to detect spambots which just wildly fill in all the fields.
    
    Returns:
    
    A string
  - isValidUserProfile
```
public boolean isValidUserProfile(WikiContext context,
                                  UserProfile profile)
```
    Checks whether the UserProfile matches certain checks.
    
    Parameters:
    
    profile - The profile to check
    
    context - The WikiContext
    
    Returns:
    
    False, if this userprofile is suspect and should not be allowed to be added.
    
    Since:
    
    2.6.1
  - getSpamHash
```
public static final java.lang.String getSpamHash(WikiPage page,
                                                 HttpServletRequest request)
```
    This method is used to calculate an unique code when submitting the page to detect edit conflicts. It currently incorporates the last-modified date of the page, and the IP address of the submitter.
    
    Parameters:
    
    page - The WikiPage under edit
    
    request - The HTTP Request
    
    Returns:
    
    A hash value for this page and session
    
    Since:
    
    2.6
  - getHashFieldName
```
public static final java.lang.String getHashFieldName(HttpServletRequest request)
```
    Returns the name of the hash field to be used in this request. The value is unique per session, and once the session has expired, you cannot edit anymore.
    
    Parameters:
    
    request - The page request
    
    Returns:
    
    The name to be used in the hash field
    
    Since:
    
    2.6
  - checkHash
```
public static final boolean checkHash(WikiContext context,
                                      PageContext pageContext)
                               throws java.io.IOException
```
    This method checks if the hash value is still valid, i.e. if it exists at all. This can occur in two cases: either this is a spam bot which is not adaptive, or it is someone who has been editing one page for too long, and their session has expired.
    This method puts a redirect to the http response field to page "SessionExpired" and logs the incident in the spam log (it may or may not be spam, but it's rather likely that it is).
    
    Parameters:
    
    context - The WikiContext
    
    pageContext - The JSP PageContext.
    
    Returns:
    
    True, if hash is okay. False, if hash is not okay, and you need to redirect.
    
    Throws:
    
    java.io.IOException - If redirection fails
    
    Since:
    
    2.6
  - insertInputFields
```
public static final java.lang.String insertInputFields(PageContext pageContext)
```
    This helper method adds all the input fields to your editor that the SpamFilter requires to check for spam. This must be in your editor form if you intend to use the SpamFilter.
    
    Parameters:
    
    pageContext - The PageContext
    
    Returns:
    
    A HTML string which contains input fields for the SpamFilter.

Class SpamFilter

Field Summary

Fields inherited from class com.ecyrd.jspwiki.filters.BasicPageFilter

Constructor Summary

Method Summary

Methods inherited from class com.ecyrd.jspwiki.filters.BasicPageFilter

Methods inherited from class java.lang.Object

Field Detail

PROP_WORDLIST

PROP_ERRORPAGE

PROP_PAGECHANGES

PROP_SIMILARCHANGES

PROP_BANTIME

PROP_BLACKLIST

PROP_MAXURLS

PROP_AKISMET_API_KEY

PROP_IGNORE_AUTHENTICATED

PROP_CAPTCHA

PROP_FILTERSTRATEGY

STRATEGY_EAGER

STRATEGY_SCORE

Constructor Detail

SpamFilter

Method Detail

initialize

preSave

getBotFieldName

isValidUserProfile

getSpamHash

getHashFieldName

checkHash

insertInputFields