- request_rec每個請求的相關資訊
- server_rec每個主機的相關資訊
- conn_rec每次連線的相關資訊
- process_rec每個程序的相關資訊
詳細程式碼如下：
struct request_rec {
/** The pool associated with the request */
apr_pool_t *pool;
/** The connection to the client */
conn_rec *connection;
/** The virtual host for this request */
server_rec *server;
/** Pointer to the redirected request if this is an external redirect */
request_rec *next;
/** Pointer to the previous request if this is an internal redirect */
request_rec *prev;
/** Pointer to the main request if this is a sub-request
* (see http_request.h) */
request_rec *main;
/* Info about the request itself... we begin with stuff that only
* protocol.c should ever touch...
*/
/** First line of request */
char *the_request;
/** HTTP/0.9, "simple" request (e.g. GET /foo\n w/no headers) */
int assbackwards;
/** A proxy request (calculated during post_read_request/translate_name)
* possible values PROXYREQ_NONE, PROXYREQ_PROXY, PROXYREQ_REVERSE,
* PROXYREQ_RESPONSE
*/
int proxyreq;
/** HEAD request, as opposed to GET */
int header_only;
/** Protocol string, as given to us, or HTTP/0.9 */
char *protocol;
/** Protocol version number of protocol; 1.1 = 1001 */
int proto_num;
/** Host, as set by full URI or Host: */
const char *hostname;
/** Time when the request started */
apr_time_t request_time;
/** Status line, if set by script */
const char *status_line;
/** Status line */
int status;
/* Request method, two ways; also, protocol, etc.. Outside of protocol.c,
* look, but don't touch.
*/
/** Request method (eg. GET, HEAD, POST, etc.) */
const char *method;
/** M_GET, M_POST, etc. */
int method_number;
/**
* 'allowed' is a bitvector of the allowed methods.
*
* A handler must ensure that the request method is one that
* it is capable of handling. Generally modules should DECLINE
* any request methods they do not handle. Prior to aborting the
* handler like this the handler should set r->allowed to the list
* of methods that it is willing to handle. This bitvector is used
* to construct the "Allow:" header required for OPTIONS requests,
* and HTTP_METHOD_NOT_ALLOWED and HTTP_NOT_IMPLEMENTED status codes.
*
* Since the default_handler deals with OPTIONS, all modules can
* usually decline to deal with OPTIONS. TRACE is always allowed,
* modules don't need to set it explicitly.
*
* Since the default_handler will always handle a GET, a
* module which does *not* implement GET should probably return
* HTTP_METHOD_NOT_ALLOWED. Unfortunately this means that a Script GET
* handler can't be installed by mod_actions.
*/
apr_int64_t allowed;
/** Array of extension methods */
apr_array_header_t *allowed_xmethods;
/** List of allowed methods */
ap_method_list_t *allowed_methods;
/** byte count in stream is for body */
apr_off_t sent_bodyct;
/** body byte count, for easy access */
apr_off_t bytes_sent;
/** Last modified time of the requested resource */
apr_time_t mtime;
/* HTTP/1.1 connection-level features */
/** sending chunked transfer-coding */
int chunked;
/** The Range: header */
const char *range;
/** The "real" content length */
apr_off_t clength;
/** Remaining bytes left to read from the request body */
apr_off_t remaining;
/** Number of bytes that have been read from the request body */
apr_off_t read_length;
/** Method for reading the request body
* (eg. REQUEST_CHUNKED_ERROR, REQUEST_NO_BODY,
* REQUEST_CHUNKED_DECHUNK, etc...) */
int read_body;
/** reading chunked transfer-coding */
int read_chunked;
/** is client waiting for a 100 response? */
unsigned expecting_100;
/* MIME header environments, in and out. Also, an array containing
* environment variables to be passed to subprocesses, so people can
* write modules to add to that environment.
*
* The difference between headers_out and err_headers_out is that the
* latter are printed even on error, and persist across internal redirects
* (so the headers printed for ErrorDocument handlers will have them).
*
* The 'notes' apr_table_t is for notes from one module to another, with no
* other set purpose in mind...
*/
/** MIME header environment from the request */
apr_table_t *headers_in;
/** MIME header environment for the response */
apr_table_t *headers_out;
/** MIME header environment for the response, printed even on errors and
* persist across internal redirects */
apr_table_t *err_headers_out;
/** Array of environment variables to be used for sub processes */
apr_table_t *subprocess_env;
/** Notes from one module to another */
apr_table_t *notes;
/* content_type, handler, content_encoding, and all content_languages
* MUST be lowercased strings. They may be pointers to static strings;
* they should not be modified in place.
*/
/** The content-type for the current request */
const char *content_type; /* Break these out --- we dispatch on 'em */
/** The handler string that we use to call a handler function */
const char *handler; /* What we *really* dispatch on */
/** How to encode the data */
const char *content_encoding;
/** Array of strings representing the content languages */
apr_array_header_t *content_languages;
/** variant list validator (if negotiated) */
char *vlist_validator;
/** If an authentication check was made, this gets set to the user name. */
char *user;
/** If an authentication check was made, this gets set to the auth type. */
char *ap_auth_type;
/** This response can not be cached */
int no_cache;
/** There is no local copy of this response */
int no_local_copy;
/* What object is being requested (either directly, or via include
* or content-negotiation mapping).
*/
/** The URI without any parsing performed */
char *unparsed_uri;
/** The path portion of the URI */
char *uri;
/** The filename on disk corresponding to this response */
char *filename;
/* XXX: What does this mean? Please define "canonicalize" -aaron */
/** The true filename, we canonicalize r->filename if these don't match */
char *canonical_filename;
/** The PATH_INFO extracted from this request */
char *path_info;
/** The QUERY_ARGS extracted from this request */
char *args;
/** finfo.protection (st_mode) set to zero if no such file */
apr_finfo_t finfo;
/** A struct containing the components of URI */
apr_uri_t parsed_uri;
/**
* Flag for the handler to accept or reject path_info on
* the current request. All modules should respect the
* AP_REQ_ACCEPT_PATH_INFO and AP_REQ_REJECT_PATH_INFO
* values, while AP_REQ_DEFAULT_PATH_INFO indicates they
* may follow existing conventions. This is set to the
* user's preference upon HOOK_VERY_FIRST of the fixups.
*/
int used_path_info;
/* Various other config info which may change with .htaccess files
* These are config vectors, with one void* pointer for each module
* (the thing pointed to being the module's business).
*/
/** Options set in config files, etc. */
struct ap_conf_vector_t *per_dir_config;
/** Notes on *this* request */
struct ap_conf_vector_t *request_config;
/**
* A linked list of the .htaccess configuration directives
* accessed by this request.
* N.B. always add to the head of the list, _never_ to the end.
* that way, a sub request's list can (temporarily) point to a parent's list
*/
const struct htaccess_result *htaccess;
/** A list of output filters to be used for this request */
struct ap_filter_t *output_filters;
/** A list of input filters to be used for this request */
struct ap_filter_t *input_filters;
/** A list of protocol level output filters to be used for this
* request */
struct ap_filter_t *proto_output_filters;
/** A list of protocol level input filters to be used for this
* request */
struct ap_filter_t *proto_input_filters;
/** A flag to determine if the eos bucket has been sent yet */
int eos_sent;
/* Things placed at the end of the record to avoid breaking binary
* compatibility. It would be nice to remember to reorder the entire
* record to improve 64bit alignment the next time we need to break
* binary compatibility for some other reason.
*/
};
struct server_rec {
/** The process this server is running in */這個伺服器正在執行的行程，也許是虛擬伺服器
process_rec *process;
/** The next server in the list */位於清單中，下一個伺服器組態
server_rec *next;
/** The name of the server */這個伺服器的名子
const char *defn_name;
/** The line of the config file that the server was defined on */組態檔httpd.conf中，定義伺服器的行號
unsigned defn_line_number;
/* Contact information */
/** The admin's contact information */管理員的聯絡資訊(電子信箱)
char *server_admin;
/** The server hostname */這個伺服器的主機名稱
char *server_hostname;
/** for redirects, etc. */用於重新導向，埠號
apr_port_t port;
/* Log files --- note that transfer log is now in the modules... */
/** The name of the error log */錯誤記錄檔的名稱
char *error_fname;
/** A file descriptor that references the error log */指標，指向錯誤記錄檔
apr_file_t *error_log;
/** The log level for this server */記錄檔記錄的層次
int loglevel;
/* Module-specific configuration for server, and defaults... */
/** true if this is the virtual server */是否是虛擬伺服器
int is_virtual;
/** Config vector containing pointers to modules' per-server config
* structures. */指向伺服器組態的向量
struct ap_conf_vector_t *module_config;
/** MIME type info, etc., before we start checking per-directory info */MIME型態資訊
struct ap_conf_vector_t *lookup_defaults;
/* Transaction handling */
/** I haven't got a clue */還不知道這是什麼！
server_addr_rec *addrs;
/** Timeout, as an apr interval, before we give up */逾時時間
apr_interval_time_t timeout;
/** The apr interval we will wait for another request */持續連線的逾時時間
apr_interval_time_t keep_alive_timeout;
/** Maximum requests per connection */每個連線的最大請求數目
int keep_alive_max;
/** Use persistent connections? */是否使用http的持續連線
int keep_alive;
/** Pathname for ServerPath */伺服器路徑的名稱
const char *path;
/** Length of path */路徑長度
int pathlen;
/** Normal names for ServerAlias servers */別名伺服器的正常名稱
apr_array_header_t *names;
/** Wildcarded names for ServerAlias servers */別名伺服器的萬用名稱
apr_array_header_t *wild_names;
/** limit on size of the HTTP request line */請求的行數限制
int limit_req_line;
/** limit on size of any request header field */請求標頭欄位大小的限制
int limit_req_fieldsize;
/** limit on number of request header fields */請求標頭欄位數目的限制
int limit_req_fields;
/** The server request scheme for redirect responses */重新導向的請求方法
const char *server_scheme;
};
struct conn_rec {
/** Pool associated with this connection */
apr_pool_t *pool;
/** Physical vhost this conn came in on */
server_rec *base_server;
/** used by http_vhost.c */
void *vhost_lookup_data;
/* Information about the connection itself */
/** local address */
apr_sockaddr_t *local_addr;
/** remote address */
apr_sockaddr_t *remote_addr;
/** Client's IP address */
char *remote_ip;
/** Client's DNS name, if known. NULL if DNS hasn't been checked,
* "" if it has and no address was found. N.B. Only access this though
* get_remote_host() */
char *remote_host;
/** Only ever set if doing rfc1413 lookups. N.B. Only access this through
* get_remote_logname() */
char *remote_logname;
/** Are we still talking? */
unsigned aborted:1;
/** Are we going to keep the connection alive for another request?
* @see ap_conn_keepalive_e */
ap_conn_keepalive_e keepalive;
/** have we done double-reverse DNS? -1 yes/failure, 0 not yet,
* 1 yes/success */
signed int double_reverse:2;
/** How many times have we used it? */
int keepalives;
/** server IP address */
char *local_ip;
/** used for ap_get_server_name when UseCanonicalName is set to DNS
* (ignores setting of HostnameLookups) */
char *local_host;
/** ID of this connection; unique at any point in time */
long id;
/** Config vector containing pointers to connections per-server
* config structures. */
struct ap_conf_vector_t *conn_config;
/** Notes on *this* connection: send note from one module to
* another. must remain valid for all requests on this conn */
apr_table_t *notes;
/** A list of input filters to be used for this connection */
struct ap_filter_t *input_filters;
/** A list of output filters to be used for this connection */
struct ap_filter_t *output_filters;
/** handle to scoreboard information for this connection */
void *sbh;
/** The bucket allocator to use for all bucket/brigade creations */
struct apr_bucket_alloc_t *bucket_alloc;
/** The current state of this connection */
conn_state_t *cs;
/** Is there data pending in the input filters? */
int data_in_input_filters;
/** Are there any filters that clogg/buffer the input stream, breaking
* the event mpm.
*/
int clogging_input_filters;
};
struct process_rec {
/** Global pool. Cleared upon normal exit */
apr_pool_t *pool;
/** Configuration pool. Cleared upon restart */
apr_pool_t *pconf;
/** Number of command line arguments passed to the program */
int argc;
/** The command line arguments */
const char * const *argv;
/** The program name used to execute the program */
const char *short_name;
};
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