/*
 * Copyright (C) NGINX, Inc.
 * Copyright (C) Valentin V. Bartenev
 */

#ifndef _NXT_HTTP_PARSER_H_INCLUDED_
#define _NXT_HTTP_PARSER_H_INCLUDED_


typedef struct nxt_http_request_parse_s  nxt_http_request_parse_t;
typedef struct nxt_http_fields_hash_s    nxt_http_fields_hash_t;


typedef union {
   u_char             str[8];
   uint64_t           ui64;
} nxt_http_ver_t;


typedef struct {
    union {
        uint8_t       str[32];
        uint64_t      ui64[4];
    } key;

    nxt_str_t         name;
    nxt_str_t         value;
} nxt_http_field_t;


struct nxt_http_request_parse_s {
    nxt_int_t         (*handler)(nxt_http_request_parse_t *rp,
                                 u_char **pos, u_char *end);

    size_t            offset;

    nxt_str_t         method;

    u_char            *target_start;
    u_char            *target_end;
    u_char            *exten_start;
    u_char            *args_start;

    nxt_http_ver_t    version;

    nxt_http_field_t  field;
    nxt_list_t        *fields;

    /* target with "/." */
    unsigned          complex_target:1;
    /* target with "%" */
    unsigned          quoted_target:1;
    /* target with " " */
    unsigned          space_in_target:1;
    /* target with "+" */
    unsigned          plus_in_target:1;
};


typedef nxt_int_t (*nxt_http_field_handler_t)(void *ctx,
                                              nxt_http_field_t *field,
                                              uintptr_t data, nxt_log_t *log);


typedef struct {
    nxt_str_t                 name;
    nxt_http_field_handler_t  handler;
    uintptr_t                 data;
} nxt_http_fields_hash_entry_t;


nxt_inline nxt_int_t
nxt_http_parse_request_init(nxt_http_request_parse_t *rp, nxt_mem_pool_t *mp)
{
    rp->fields = nxt_list_create(mp, 8, sizeof(nxt_http_field_t));
    if (nxt_slow_path(rp->fields == NULL)){
        return NXT_ERROR;
    }

    return NXT_OK;
}


nxt_int_t nxt_http_parse_request(nxt_http_request_parse_t *rp,
    nxt_buf_mem_t *b);

nxt_http_fields_hash_t *nxt_http_fields_hash_create(
    nxt_http_fields_hash_entry_t *entries, nxt_mem_pool_t *mp);
nxt_http_fields_hash_entry_t *nxt_http_fields_hash_lookup(
    nxt_http_fields_hash_t *hash, nxt_http_field_t *field);

nxt_int_t nxt_http_fields_process(nxt_list_t *fields,
    nxt_http_fields_hash_t *hash, void *ctx, nxt_log_t *log);


#endif /* _NXT_HTTP_PARSER_H_INCLUDED_ */