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/*
* Copyright (C) NGINX, Inc.
* Copyright (C) Valentin V. Bartenev
*/
#ifndef _NXT_HTTP_PARSER_H_INCLUDED_
#define _NXT_HTTP_PARSER_H_INCLUDED_
typedef enum {
NXT_HTTP_PARSE_INVALID = 1,
NXT_HTTP_PARSE_UNSUPPORTED_VERSION,
NXT_HTTP_PARSE_TOO_LARGE_FIELD,
} nxt_http_parse_error_t;
typedef struct nxt_http_request_parse_s nxt_http_request_parse_t;
typedef struct nxt_http_field_s nxt_http_field_t;
typedef struct nxt_http_fields_hash_s nxt_http_fields_hash_t;
typedef union {
u_char str[8];
uint64_t ui64;
struct {
u_char prefix[5];
u_char major;
u_char point;
u_char minor;
} s;
} nxt_http_ver_t;
struct nxt_http_request_parse_s {
nxt_int_t (*handler)(nxt_http_request_parse_t *rp,
u_char **pos, const u_char *end);
nxt_str_t method;
u_char *target_start;
u_char *target_end;
u_char *request_line_end;
nxt_str_t path;
nxt_str_t args;
nxt_http_ver_t version;
nxt_list_t *fields;
nxt_mp_t *mem_pool;
nxt_str_t field_name;
nxt_str_t field_value;
uint32_t field_hash;
uint8_t skip_field; /* 1 bit */
uint8_t discard_unsafe_fields; /* 1 bit */
/* target with "/." */
uint8_t complex_target; /* 1 bit */
#if 0
/* target with "%" */
uint8_t quoted_target; /* 1 bit */
/* target with " " */
uint8_t space_in_target; /* 1 bit */
#endif
/* Preserve encoded '/' (%2F) and '%' (%25). */
uint8_t encoded_slashes; /* 1 bit */
};
typedef nxt_int_t (*nxt_http_field_handler_t)(void *ctx,
nxt_http_field_t *field,
uintptr_t data);
typedef struct {
nxt_str_t name;
nxt_http_field_handler_t handler;
uintptr_t data;
} nxt_http_field_proc_t;
struct nxt_http_field_s {
uint16_t hash;
uint8_t skip:1;
uint8_t hopbyhop:1;
uint8_t name_length;
uint32_t value_length;
u_char *name;
u_char *value;
};
typedef struct {
u_char *pos;
nxt_mp_t *mem_pool;
uint64_t chunk_size;
uint8_t state;
uint8_t last; /* 1 bit */
uint8_t chunk_error; /* 1 bit */
uint8_t error; /* 1 bit */
} nxt_http_chunk_parse_t;
#define NXT_HTTP_FIELD_HASH_INIT 159406U
#define nxt_http_field_hash_char(h, c) (((h) << 4) + (h) + (c))
#define nxt_http_field_hash_end(h) (((h) >> 16) ^ (h))
nxt_int_t nxt_http_parse_request_init(nxt_http_request_parse_t *rp,
nxt_mp_t *mp);
nxt_int_t nxt_http_parse_request(nxt_http_request_parse_t *rp,
nxt_buf_mem_t *b);
nxt_int_t nxt_http_parse_fields(nxt_http_request_parse_t *rp,
nxt_buf_mem_t *b);
nxt_int_t nxt_http_fields_hash(nxt_lvlhsh_t *hash,
nxt_http_field_proc_t items[], nxt_uint_t count);
nxt_uint_t nxt_http_fields_hash_collisions(nxt_lvlhsh_t *hash,
nxt_http_field_proc_t items[], nxt_uint_t count, nxt_bool_t level);
nxt_int_t nxt_http_fields_process(nxt_list_t *fields, nxt_lvlhsh_t *hash,
void *ctx);
nxt_int_t nxt_http_parse_complex_target(nxt_http_request_parse_t *rp);
nxt_buf_t *nxt_http_chunk_parse(nxt_task_t *task, nxt_http_chunk_parse_t *hcp,
nxt_buf_t *in);
extern const nxt_lvlhsh_proto_t nxt_http_fields_hash_proto;
nxt_inline nxt_int_t
nxt_http_field_process(nxt_http_field_t *field, nxt_lvlhsh_t *hash, void *ctx)
{
nxt_lvlhsh_query_t lhq;
nxt_http_field_proc_t *proc;
lhq.proto = &nxt_http_fields_hash_proto;
lhq.key_hash = field->hash;
lhq.key.length = field->name_length;
lhq.key.start = field->name;
if (nxt_lvlhsh_find(hash, &lhq) != NXT_OK) {
return NXT_OK;
}
proc = lhq.value;
return proc->handler(ctx, field, proc->data);
}
#endif /* _NXT_HTTP_PARSER_H_INCLUDED_ */
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