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ListenBacklog LockFile MaxClients MaxMemFree MaxRequestsPerChild MaxSpareThreads MinSpareThreads PidFile ReceiveBufferSize ScoreBoardFile SendBufferSize ServerLimit StartServers ThreadLimit ThreadsPerChild ThreadStackSize User Apache Module mod_actions Action指令 Script指令 Apache Module mod_alias 处理顺序 Alias AliasMatch Redirect RedirectMatch RedirectPermanent RedirectTemp ScriptAlias ScriptAliasMatch Apache Module mod_asis 用法 Apache Module mod_auth_basic AuthBasicAuthoritative AuthBasicProvider Apache Module mod_auth_digest 使用摘要认证 配合 MS Internet Explorer 6 工作 AuthDigestAlgorithm AuthDigestDomain AuthDigestNcCheck AuthDigestNonceFormat AuthDigestNonceLifetime AuthDigestProvider AuthDigestQop AuthDigestShmemSize Apache Module mod_authn_alias 示例 <AuthnProviderAlias> Apache Module mod_authn_anon 示例 Anonymous Anonymous_LogEmail Anonymous_MustGiveEmail Anonymous_NoUserID Anonymous_VerifyEmail Apache Module mod_authn_dbd 配置示例 AuthDBDUserPWQuery AuthDBDUserRealmQuery Apache Module mod_authn_dbm 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AddIconByType DefaultIcon HeaderName IndexIgnore IndexOptions IndexOrderDefault IndexStyleSheet ReadmeName Apache Module mod_cache Related Modules and Directives 配置示例 CacheDefaultExpire CacheDisable CacheEnable CacheIgnoreCacheControl CacheIgnoreHeaders CacheIgnoreNoLastMod CacheLastModifiedFactor CacheMaxExpire CacheStoreNoStore CacheStorePrivate Apache Module mod_cern_meta MetaDir MetaFiles MetaSuffix Apache Module mod_cgi CGI 环境变量 CGI 脚本的调试 ScriptLog ScriptLogBuffer ScriptLogLength Apache Module mod_cgid ScriptSock ScriptLog ScriptLogBuffer ScriptLogLength Apache Module mod_charset_lite Common Problems CharsetDefault CharsetOptions CharsetSourceEnc Apache Module mod_dav Enabling WebDAV Security Issues Complex Configurations Dav DavDepthInfinity DavMinTimeout Apache Module mod_dav_fs DavLockDB Apache Module mod_dav_lock DavGenericLockDB Apache Module mod_dbd Connection Pooling Apache DBD API SQL Prepared Statements DBDExptime DBDKeep DBDMax DBDMin DBDParams DBDPersist DBDPrepareSQL 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mod_ident IdentityCheck IdentityCheckTimeout Apache Module mod_imagemap New Features Imagemap File Example Mapfile Referencing your mapfile ImapBase ImapDefault ImapMenu Apache Module mod_include Enabling Server-Side Includes PATH_INFO with Server Side Includes Basic Elements Include Variables Variable Substitution Flow Control Elements SSIEndTag SSIErrorMsg SSIStartTag SSITimeFormat SSIUndefinedEcho XBitHack Apache Module mod_info 安全问题 选择哪些信息可以被显示 已知的局限 AddModuleInfo Apache Module mod_isapi 用法 附加注释 程序员注记 ISAPIAppendLogToErrors ISAPIAppendLogToQuery ISAPICacheFile ISAPIFakeAsync ISAPILogNotSupported ISAPIReadAheadBuffer Apache Module mod_ldap 示例配置 LDAP 连接池 LDAP 缓冲 使用SSL/TLS SSL/TLS 证书 LDAPCacheEntries LDAPCacheTTL LDAPConnectionTimeout LDAPOpCacheEntries LDAPOpCacheTTL LDAPSharedCacheFile LDAPSharedCacheSize LDAPTrustedClientCert LDAPTrustedGlobalCert LDAPTrustedMode LDAPVerifyServerCert Apache Module mod_log_config 定制日志文件格式 安全考虑 BufferedLogs CookieLog CustomLog LogFormat TransferLog Apache Module mod_log_forensic 定制日志文件格式 安全考虑 ForensicLog Apache Module mod_logio 定制日志文件格式 Apache Module mod_mem_cache MCacheMaxObjectCount MCacheMaxObjectSize MCacheMaxStreamingBuffer MCacheMinObjectSize MCacheRemovalAlgorithm MCacheSize Apache Module mod_mime 带多扩展名的文件 内容编码 字符集和语言 AddCharset AddEncoding AddHandler AddInputFilter AddLanguage AddOutputFilter AddType DefaultLanguage ModMimeUsePathInfo MultiviewsMatch RemoveCharset RemoveEncoding RemoveHandler RemoveInputFilter RemoveLanguage RemoveOutputFilter RemoveType TypesConfig Apache Module mod_mime_magic "Magic文件"的格式 性能问题 注意 MimeMagicFile Apache Module mod_negotiation 类型表 MultiViews CacheNegotiatedDocs ForceLanguagePriority LanguagePriority Apache Module mod_nw_ssl NWSSLTrustedCerts NWSSLUpgradeable SecureListen Apache Module mod_proxy 正向和反向代理 简单示例 控制对代理服务器的访问 缓慢启动 局域网代理 协议调整 请求体 AllowCONNECT NoProxy <Proxy> ProxyBadHeader ProxyBlock ProxyDomain ProxyErrorOverride ProxyIOBufferSize <ProxyMatch> ProxyMaxForwards ProxyPass ProxyPassReverse ProxyPassReverseCookieDomain ProxyPassReverseCookiePath ProxyPreserveHost ProxyReceiveBufferSize ProxyRemote ProxyRemoteMatch ProxyRequests ProxyTimeout ProxyVia Apache Module mod_proxy_ajp Overview of the protocol Basic Packet Structure Request Packet Structure Response Packet Structure Apache Module mod_proxy_balancer Load balancer scheduler algorithm Request Counting Algorithm Weighted Traffic Counting Algorithm Enabling Balancer Manager Support Apache Module mod_proxy_connect Apache Module mod_proxy_ftp 为什么xxx类型的文件不能从FTP下载？ 如何强制文件xxx使用FTP的ASCII形式下载？ 我如何使用FTP上传？ 我如何能访问我自己home目录以外的FTP文件？ 我如何才能在浏览器的URL框中隐藏FTP的明文密码？ Apache Module mod_proxy_http Apache Module mod_rewrite 特殊字符的引用 环境变量 实用方案 RewriteBase RewriteCond RewriteEngine RewriteLock RewriteLog RewriteLogLevel RewriteMap RewriteOptions RewriteRule Apache Module mod_setenvif BrowserMatch BrowserMatchNoCase SetEnvIf SetEnvIfNoCase Apache Module mod_so 为Windows创建可加载模块 LoadFile LoadModule Apache Module mod_speling CheckSpelling Apache Module mod_ssl 环境变量 Custom Log Formats SSLCACertificateFile SSLCACertificatePath SSLCADNRequestFile SSLCADNRequestPath SSLCARevocationFile SSLCARevocationPath SSLCertificateChainFile SSLCertificateFile SSLCertificateKeyFile SSLCipherSuite SSLCryptoDevice SSLEngine SSLHonorCipherOrder SSLMutex SSLOptions SSLPassPhraseDialog SSLProtocol SSLProxyCACertificateFile SSLProxyCACertificatePath SSLProxyCARevocationFile SSLProxyCARevocationPath SSLProxyCipherSuite SSLProxyEngine SSLProxyMachineCertificateFile SSLProxyMachineCertificatePath SSLProxyProtocol SSLProxyVerify SSLProxyVerifyDepth SSLRandomSeed SSLRequire SSLRequireSSL SSLSessionCache SSLSessionCacheTimeout SSLUserName SSLVerifyClient SSLVerifyDepth Apache Module mod_status Enabling Status Support 自动更新 Machine Readable Status File ExtendedStatus Apache Module mod_suexec SuexecUserGroup Apache Module mod_unique_id Theory Apache Module mod_userdir UserDir Apache Module mod_usertrack Logging 2-digit or 4-digit dates for cookies? CookieDomain CookieExpires CookieName CookieStyle CookieTracking Apache Module mod_version <IfVersion> Apache Module mod_vhost_alias 目录名称的转换 示例 VirtualDocumentRoot VirtualDocumentRootIP VirtualScriptAlias VirtualScriptAliasIP 开发者文档 Overview Topics External Resources Apache API notes Basic concepts How handlers work Resource allocation and resource pools Configuration Debugging Memory Allocation in APR Available debugging options Allowable Combinations Activating Debugging Options Documenting Apache 2.0 Apache 2.0 Hook Functions Creating a hook function Hooking the hook Converting Modules from Apache 1.3 to Apache 2.0 The easier changes ... The messier changes... Request Processing in Apache 2.0 The Request Processing Cycle The Request Parsing Phase The Security Phase The Preparation Phase The Handler Phase How Filters Work in Apache 2.0 Filter Types How are filters inserted? Asis Explanations 词汇和索引 词汇表 模块索引 指令索引 指令速查 译者声明

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Converting Modules from Apache 1.3 to Apache 2.0

This is a first attempt at writing the lessons I learned when trying to convert the mod_mmap_static module to Apache 2.0. It's by no means definitive and probably won't even be correct in some ways, but it's a start.

The easier changes ...

Cleanup Routines

These now need to be of type apr_status_t and return a value of that type. Normally the return value will be APR_SUCCESS unless there is some need to signal an error in the cleanup. Be aware that even though you signal an error not all code yet checks and acts upon the error.

Initialisation Routines

These should now be renamed to better signify where they sit in the overall process. So the name gets a small change from mmap_init to mmap_post_config. The arguments passed have undergone a radical change and now look like

  • apr_pool_t *p
  • apr_pool_t *plog
  • apr_pool_t *ptemp
  • server_rec *s

Data Types

A lot of the data types have been moved into the APR. This means that some have had a name change, such as the one shown above. The following is a brief list of some of the changes that you are likely to have to make.

  • pool becomes apr_pool_t
  • table becomes apr_table_t

The messier changes...

Register Hooks

The new architecture uses a series of hooks to provide for calling your functions. These you'll need to add to your module by way of a new function, static void register_hooks(void). The function is really reasonably straightforward once you understand what needs to be done. Each function that needs calling at some stage in the processing of a request needs to be registered, handlers do not. There are a number of phases where functions can be added, and for each you can specify with a high degree of control the relative order that the function will be called in.

This is the code that was added to mod_mmap_static:

static void register_hooks(void)
{
    static const char * const aszPre[]={ "http_core.c",NULL };
    ap_hook_post_config(mmap_post_config,NULL,NULL,HOOK_MIDDLE);
    ap_hook_translate_name(mmap_static_xlat,aszPre,NULL,HOOK_LAST);
};

This registers 2 functions that need to be called, one in the post_config stage (virtually every module will need this one) and one for the translate_name phase. note that while there are different function names the format of each is identical. So what is the format?

ap_hook_phase_name(function_name, predecessors, successors, position);

There are 3 hook positions defined...

  • HOOK_FIRST
  • HOOK_MIDDLE
  • HOOK_LAST

To define the position you use the position and then modify it with the predecessors and successors. Each of the modifiers can be a list of functions that should be called, either before the function is run (predecessors) or after the function has run (successors).

In the mod_mmap_static case I didn't care about the post_config stage, but the mmap_static_xlat must be called after the core module had done it's name translation, hence the use of the aszPre to define a modifier to the position HOOK_LAST.

Module Definition

There are now a lot fewer stages to worry about when creating your module definition. The old defintion looked like

module MODULE_VAR_EXPORT module_name_module =
{
    STANDARD_MODULE_STUFF,
    /* initializer */
    /* dir config creater */
    /* dir merger --- default is to override */
    /* server config */
    /* merge server config */
    /* command handlers */
    /* handlers */
    /* filename translation */
    /* check_user_id */
    /* check auth */
    /* check access */
    /* type_checker */
    /* fixups */
    /* logger */
    /* header parser */
    /* child_init */
    /* child_exit */
    /* post read-request */
};

The new structure is a great deal simpler...

module MODULE_VAR_EXPORT module_name_module =
{
    STANDARD20_MODULE_STUFF,
    /* create per-directory config structures */
    /* merge per-directory config structures  */
    /* create per-server config structures    */
    /* merge per-server config structures     */
    /* command handlers */
    /* handlers */
    /* register hooks */
};

Some of these read directly across, some don't. I'll try to summarise what should be done below.

The stages that read directly across :

/* dir config creater */
/* create per-directory config structures */
/* server config */
/* create per-server config structures */
/* dir merger */
/* merge per-directory config structures */
/* merge server config */
/* merge per-server config structures */
/* command table */
/* command apr_table_t */
/* handlers */
/* handlers */

The remainder of the old functions should be registered as hooks. There are the following hook stages defined so far...

ap_hook_post_config
this is where the old _init routines get registered
ap_hook_http_method
retrieve the http method from a request. (legacy)
ap_hook_open_logs
open any specified logs
ap_hook_auth_checker
check if the resource requires authorization
ap_hook_access_checker
check for module-specific restrictions
ap_hook_check_user_id
check the user-id and password
ap_hook_default_port
retrieve the default port for the server
ap_hook_pre_connection
do any setup required just before processing, but after accepting
ap_hook_process_connection
run the correct protocol
ap_hook_child_init
call as soon as the child is started
ap_hook_create_request
??
ap_hook_fixups
last chance to modify things before generating content
ap_hook_handler
generate the content
ap_hook_header_parser
lets modules look at the headers, not used by most modules, because they use post_read_request for this
ap_hook_insert_filter
to insert filters into the filter chain
ap_hook_log_transaction
log information about the request
ap_hook_optional_fn_retrieve
retrieve any functions registered as optional
ap_hook_post_read_request
called after reading the request, before any other phase
ap_hook_quick_handler
called before any request processing, used by cache modules.
ap_hook_translate_name
translate the URI into a filename
ap_hook_type_checker
determine and/or set the doc type
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