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#ifndef _NGX_HTTP_H_INCLUDED_
#define _NGX_HTTP_H_INCLUDED_


#include <ngx_config.h>

#include <ngx_types.h>
#include <ngx_string.h>
#include <ngx_table.h>
#include <ngx_hunk.h>
#include <ngx_files.h>
#include <ngx_connection.h>
#include <ngx_conf_file.h>


#define NGX_HTTP_VERSION_10       1000

#define NGX_HTTP_GET   1
#define NGX_HTTP_HEAD  2
#define NGX_HTTP_POST  3

#define NGX_HTTP_CONN_CLOSE       0
#define NGX_HTTP_CONN_KEEP_ALIVE  1


#define NGX_HTTP_PARSE_HEADER_DONE      1
#define NGX_HTTP_PARSE_INVALID_METHOD   10
#define NGX_HTTP_PARSE_INVALID_REQUEST  11
#define NGX_HTTP_PARSE_TOO_LONG_URI     12
#define NGX_HTTP_PARSE_INVALID_HEAD     13
#define NGX_HTTP_PARSE_INVALID_HEADER   14


#define NGX_HTTP_OK                     200
#define NGX_HTTP_SPECIAL_RESPONSE       300
#define NGX_HTTP_MOVED_PERMANENTLY      301
#define NGX_HTTP_MOVED_TEMPORARILY      302
#define NGX_HTTP_NOT_MODIFIED           304
#define NGX_HTTP_BAD_REQUEST            400
#define NGX_HTTP_NOT_FOUND              404
#define NGX_HTTP_REQUEST_URI_TOO_LARGE  414
#define NGX_HTTP_INTERNAL_SERVER_ERROR  500


#define NGX_HTTP_STATIC_HANDLER     0
#define NGX_HTTP_DIRECTORY_HANDLER  1



typedef struct {
    char          *doc_root;
    size_t         doc_root_len;

    size_t         connection_pool_size;
    size_t         request_pool_size;

    size_t         header_buffer_size;
    size_t         discarded_buffer_size;

    ngx_msec_t     header_timeout;
    ngx_msec_t     lingering_timeout;
    time_t         lingering_time;
} ngx_http_server_t;


typedef struct {
    int    len;
    char  *data;
    int    offset;
} ngx_http_header_t;


typedef struct {
    ngx_table_elt_t  *host;
    ngx_table_elt_t  *connection;
    ngx_table_elt_t  *if_modified_since;
    ngx_table_elt_t  *user_agent;
    ngx_table_elt_t  *accept_encoding;

    ngx_table_t      *headers;
} ngx_http_headers_in_t;


typedef struct {
    int               status;
    ngx_str_t         status_line;

    ngx_table_elt_t  *server;
    ngx_table_elt_t  *date;
    ngx_table_elt_t  *content_type;
    ngx_table_elt_t  *location;
    ngx_table_elt_t  *last_modified;

    ngx_table_t      *headers;

    off_t             content_length;
    char             *charset;
    char             *etag;
    time_t            date_time;
    time_t            last_modified_time;
} ngx_http_headers_out_t;


typedef struct ngx_http_request_s ngx_http_request_t;

struct ngx_http_request_s {
    ngx_file_t  file;

#if 0
    ngx_str_t   filename;
    ngx_file_info_t fileinfo;
    ngx_fd_t  fd;
    int    filename_len;
#endif

    void  **ctx;
    void  **srv_conf;
    void  **loc_conf;

    ngx_pool_t  *pool;
    ngx_hunk_t  *header_in;

    ngx_http_headers_in_t   headers_in;
    ngx_http_headers_out_t  headers_out;

    int  (*handler)(ngx_http_request_t *r);

    int    method;

    time_t  lingering_time;

    int    http_version;
    int    http_major;
    int    http_minor;

    ngx_str_t  request_line;
    ngx_str_t  uri;
    ngx_str_t  exten;
    ngx_http_request_t *main;

    ngx_connection_t  *connection;

    int       filter;

    ssize_t   client_content_length;
    char     *discarded_buffer;

    unsigned  keepalive:1;
    unsigned  lingering_close:1;

    unsigned  header_read:1;
    unsigned  header_timeout:1;

    unsigned  logging:1;

    unsigned  header_only:1;
    unsigned  unusual_uri:1;  /* URI is not started with '/' - "GET http://" */
    unsigned  complex_uri:1;  /* URI with "/." or with "//" (WIN32) */

    int    state;
    char  *uri_start;
    char  *uri_end;
    char  *uri_ext;
    char  *args_start;
    char  *request_end;
    char  *header_name_start;
    char  *header_name_end;
    char  *header_start;
    char  *header_end;
#ifdef NGX_EVENT
    int  (*state_handler)(ngx_http_request_t *r);
#endif
};


typedef struct {
    char  *action;
    char  *client;
    char  *url;
} ngx_http_log_ctx_t;


typedef int (*ngx_http_output_header_filter_p)(ngx_http_request_t *r);

typedef int (*ngx_http_output_body_filter_p)
                                   (ngx_http_request_t *r, ngx_chain_t *chain);



typedef struct {
    int      index;

    void  *(*create_srv_conf)(ngx_pool_t *p);
    char  *(*init_srv_conf)(ngx_pool_t *p, void *conf);
    void  *(*create_loc_conf)(ngx_pool_t *p);
    char  *(*merge_loc_conf)(ngx_pool_t *p, void *prev, void *conf);

    int    (*translate_handler)(ngx_http_request_t *r);

    int    (*output_header_filter) (ngx_http_request_t *r);
    int    (*next_output_header_filter) (ngx_http_request_t *r);

    int    (*output_body_filter) (ngx_http_request_t *r, ngx_chain_t *ch);
    int    (*next_output_body_filter) (ngx_http_request_t *r, ngx_chain_t *ch);
} ngx_http_module_t;


#define NGX_HTTP_MODULE        0x80000000

#define NGX_HTTP_MODULE_TYPE   0x50545448   /* "HTTP" */


#define ngx_http_get_module_srv_conf(r, module)  r->srv_conf[module.index]
#define ngx_http_get_module_loc_conf(r, module)  r->loc_conf[module.index]
#define ngx_http_get_module_ctx(r, module)       r->ctx[module.index]

#define ngx_http_create_ctx(r, cx, module, size)                              \
            do {                                                              \
                ngx_test_null(cx, ngx_pcalloc(r->pool, size), NGX_ERROR);     \
                r->ctx[module.index] = cx;                                    \
            } while (0)



/* STUB */
#define NGX_INDEX "index.html"


/* STUB */
int ngx_http_init(ngx_pool_t *pool, ngx_log_t *log);
/**/

int ngx_http_init_connection(ngx_connection_t *c);


int ngx_http_discard_body(ngx_http_request_t *r);


extern int  ngx_max_module;
extern ngx_array_t  ngx_http_servers;


extern int  ngx_http_post_accept_timeout;
extern int  ngx_http_connection_pool_size;
extern int  ngx_http_request_pool_size;
extern int  ngx_http_client_header_timeout;
extern int  ngx_http_client_header_buffer_size;
extern int  ngx_http_discarded_buffer_size;

extern int  ngx_http_lingering_timeout;
extern int  ngx_http_lingering_time;


extern ngx_http_module_t  *ngx_http_modules[];



#endif /* _NGX_HTTP_H_INCLUDED_ */