Compatibility chart

Overview

Helicon Ape is designed to maintain maximum Apache compatibility. Although this target has been achieved at very high level, some features may not be implemented because they are too bounded to Apache or UNIX design and their implementation on IIS is senseless.

Please note that under Windows 2003 Helicon Ape runs as ASP.NET module, thus it will be only applied to requests that are passed to ASP.NET engine. On IIS6 you can map '*' file extension to ASP.NET engine to overcome this problem. Under IIS7 Helicon Ape is fully integrated into server pipeline and runs transparently to both server and client technology.

Complete compatibility chart for Helicon Ape and Apache

Color map

green - fully supported;
yellow - partially supported or planned for support in next minor version;
red - unsupported;
blue - Helicon Ape specific features.

Directives [flags, features] Vista/2008 (IIS 7)
7/2008 R2 (IIS 7.5)		 2003
(IIS 6)		 Apache
Core functions
AccessFileName + + +
AllowOverride + + +
AuthName + + +
AuthType + + +
ErrorDocument + + +
ErrorLog + + +
Include + + +
LogLevel + + +
Options + + +
Require + + +
Satisfy + + +
SetInputFilter + — +
SetOutputFilter + — +
<Directory> + + +
<DirectoryMatch> + + +
<Files> + + +
<FilesMatch> + + +
<IfModule> + + +
<Limit> + + +
<LimitExcept> + + +
<Location> + + +
<LocationMatch> + + +
<Proxy> + + +
<ProxyMatch> + + +
<VirtualHost> + + +
mod_asis
No directives + + +
mod_auth_basic
AuthBasicProvider + + +
AuthBasicAuthoritative + + +
mod_auth_digest
AuthDigestAlgorithm + + +
AuthDigestDomain + + +
AuthDigestNcCheck + + +
AuthDigestNonceFormat + + +
AuthDigestNonceLifetime + + +
AuthDigestProvider + + +
AuthDigestQop + + +
AuthDigestShmemSize + + +
mod_authn_anon
Anonymous + + +
Anonymous_LogEmail + + +
Anonymous_MustGiveEmail + + +
Anonymous_NoUserID + + +
Anonymous_VerifyEmail + + +
mod_authn_dbd
AuthDBDUserPWQuery + + +
AuthDBDUserRealmQuery + + +
mod_authn_default
AuthDefaultAuthoritative + + +
mod_authn_file
AuthUserFile + + +
mod_authz_groupfile
AuthGroupFile + + +
AuthzGroupFileAuthoritative + + +
mod_authz_host
Allow + + +
Deny + + +
Order + + +
mod_authz_user
AuthzUserAuthoritative + + +
mod_cache
CacheDefaultExpire + — +
CacheDisable + — +
CacheEnable + — +
CacheIgnoreCacheControl + — +
CacheIgnoreHeaders — — +
CacheIgnoreNoLastMod + — +
CacheLastModifiedFactor + — +
CacheMaxExpire + — +
CacheStoreNoStore + — +
CacheStorePrivate + — +
CacheVaryByParams + — —
CacheVaryByHeaders + — —
mod_dbd
DBDExptime + + +
DBDKeep + + +
DBDMax + + +
DBDMin + + +
DBDParams + + +
DBDPersist + + +
DBDPrepareSQL + + +
DBDriver + + +
mod_deflate
DeflateCompressionLevel + — +
mod_developer
No directives + — —
mod_dir
DirectoryIndex + + +
DirectorySlash + + +
mod_disk_cache
CacheDirLength + — +
CacheDirLevels + — +
CacheMaxFileSize + — +
CacheMinFileSize + — +
CacheRoot + — +
mod_env
PassEnv + — +
SetEnv + + +
UnsetEnv + + +
mod_evasive
DOSHashTableSize + + +
DOSPageCount + + +
DOSSiteCount + + +
DOSPageInterval + + +
DOSSiteInterval + + +
DOSBlockingPeriod + + +
DOSEmailNotify — — +
DOSSystemCommand + + +
DOSLogDir — — +
DOSCloseSocket + — —
mod_expires
ExpiresActive + + +
ExpiresByType + + +
mod_filter
FilterChain + — +
FilterDeclare — — +
FilterProtocol + — +
FilterProvider + — +
FilterTrace — — +
mod_gzip
mod_gzip_on + — +
mod_gzip_compression_level + — +
mod_gzip_add_header_count + — +
mod_gzip_minimum_file_size — — +
mod_gzip_maximum_file_size — — +
mod_gzip_item_include + — +
mod_gzip_item_exclude + — +
mod_gzip_handle_methods + — +
mod_gzip_send_vary + — +
mod_headers
Header + + +
RequestHeader + — +
mod_hotlink
HotlinkAllow + + —
HotlinkDeny + + —
HotlinkExpires + + —
HotlinkInvolveIP + + —
HotlinkProtect + + —
Link + — —
Redirect + + —
Referer + + —
HotlinkSignature + + —
mod_linkfreeze
LinkFreezeEngine + — —
LinkFreezePageSizeLimit + — —
LinkFreezeRule + — —
mod_log_config
BufferedLogs — — +
CookieLog — — +
CustomLog + — +
LogFormat + — +
TransferLog + — +
mod_logio
No directives + + +
mod_mem_cache
MCacheMaxObjectCount — — +
MCacheMaxObjectSize + — +
MCacheMaxStreamingBuffer — — +
MCacheMinObjectSize + — +
MCacheRemovalAlgorithm — — +
MCacheSize — — +
mod_mime
AddCharset + + +
AddEncoding + + +
AddHandler + + +
AddInputFilter + + +
AddLanguage + + +
AddOutputFilter + + +
AddType + + +
DefaultLanguage + + +
ModMimeUsePathInfo + + +
MultiviewsMatch — — +
RemoveCharset + + +
RemoveEncoding + + +
RemoveHandler — — +
RemoveInputFilter — — +
RemoveLanguage + + +
RemoveOutputFilter + + +
RemoveType + + +
TypesConfig — — +
mod_proxy
BalancerMember + + +
NoProxy + + +
ProxyBlock + + +
ProxyIOBufferSize + + +
ProxyMaxForwards + + +
ProxyPass + + +
ProxyPassMatch + + +
ProxyPassReverse + + +
ProxyPassReverseCookieDomain + + +
ProxyPassReverseCookiePath + + +
ProxyPreserveHost + + +
ProxyReceiveBufferSize + + +
ProxyRemote + + +
ProxyRemoteMatch + + +
ProxyRequests + — +
ProxyTimeout + + +
ProxyVia + + +
mod_replace
ReplaceFilterDefine + — +
ReplacePattern + — +
HeaderReplacePattern + — +
RequestHeaderPattern + + +
mod_rewrite
RewriteBase + + +
RewriteCond + + +
[NC] ignore case + + +
[OR] logical or combining + + +
-d (directory exist) + + +
-f (file exist) + + +
-s (non zero file) + + +
-l (symbolic link) — — +
-x (file with executable permissions) — — +
-F (file exist via subrequest) — — +
-U (URL exist via subrequest) — — +
RewriteEngine + + +
RewriteHeader + — —
RewriteLog + + +
RewriteLogLevel + + +
RewriteMap + + +
dbd (database mapping) + + —
int (internal functions toupper, tolower, escape, unescape) + + +
rnd (random mapping) + + +
txt (text mapping) + + +
txt_rev (reverse text mapping) + + —
dbm (hash file) — — +
prg (external program) — — +
[NC] ignore case + + —
RewriteOptions + + +
RewriteProxy + + —
RewriteRule + + +
[C] chain with next rule + + +
[CO=name:val:domain:lifetime:path] set cookie + + +
[CL] case lower + + —
[CU] case upper + + —
[E=var:val] set environment variable + + +
[F] force forbidden response + + +
[G] force gone response + + +
[H=content-handler] explicit content handler (unapplicable) — — +
[L] last rule flag + + +
[LP] loop + + —
[N] apply rules again + + +
[NC] ignore case + + +
[NE] don't escape output (useless, always on) + + +
[NS] no internal subrequest + — +
[O] normalize + + —
[P] proxy pass + + +
[PT] pass through the next handler (always on) — — +
[QSA] append query string + + +
[R=code] redirect + + +
[S=num] skip next n rules + + +
[SC=200..500] set status code + + +
[T=MIME-type] force explicit response MIME type + + +
[U] unmangle log + + —
mod_seo
No directives + — —
mod_setenvif
BrowserMatch + + +
BrowserMatchNoCase + + +
SetEnvIf + + +
SetEnvIfNoCase + + +
mod_so
LoadModule + + +
LoadFile — — +
mod_speling
CheckCaseOnly + — +
CheckSpelling + — +
CheckBaseName + — —
mod_usertrack
CookieDomain + — +
CookieExpires + — +
CookieName + — +
CookieStyle + — +
CookieTracking + — +
mod_xsendfile
XSendFile + — +
XSendFileAllowAbove + — +

Server variables compatibility chart

Server variables Vista/2008
(IIS 7)		 2003
(IIS 6)		 Apache
API_VERSION (returns IIS version) + + +
AUTH_TYPE + + +
DOCUMENT_ROOT + + +
HTTP_ACCEPT + + +
HTTP_COOKIE + + +
HTTP_FORWARDED + + +
HTTP_HOST + + +
HTTP_PROXY_CONNECTION + + +
HTTP_REFERER + + +
HTTP_USER_AGENT + + +
HTTPS + + +
IS_SUBREQ + — +
PATH_INFO + + +
QUERY_STRING + + +
REMOTE_ADDR + + +
REMOTE_HOST + + +
REMOTE_IDENT + + +
REMOTE_PORT + + +
REMOTE_USER + + +
REQUEST_FILENAME + + +
REQUEST_METHOD + + +
REQUEST_URI + + +
SCRIPT_FILENAME + + +
SERVER_ADDR + + +
SERVER_ADMIN + + +
SERVER_NAME + + +
SERVER_PORT + + +
SERVER_PROTOCOL + + +
SERVER_SOFTWARE + + +
THE_REQUEST + + +
TIME + + +
TIME_DAY + + +
TIME_HOUR + + +
TIME_MIN + + +
TIME_MON + + +
TIME_SEC + + +
TIME_WDAY + + +
TIME_YEAR + + +

Moreover, all IIS-specific server variables are also supported.