120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
#ifndef LNM_HTTP_RES
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#define LNM_HTTP_RES
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#include <stdbool.h>
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#include <stdio.h>
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#include "lnm/common.h"
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#include "lnm/http/consts.h"
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typedef lnm_err (*data_fn)(uint64_t *written, char *buf, lnm_http_conn *conn,
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uint64_t offset, uint64_t len);
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/**
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* Linked list elements used to store the response headers
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*/
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typedef struct lnm_http_res_header {
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struct {
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char *s;
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size_t len;
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bool owned;
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} name;
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struct {
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char *s;
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size_t len;
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bool owned;
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} value;
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struct lnm_http_res_header *next;
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} lnm_http_res_header;
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typedef enum lnm_http_res_body_type {
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lnm_http_res_body_type_file = 0,
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lnm_http_res_body_type_buf,
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lnm_http_res_body_type_fn,
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} lnm_http_res_body_type;
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typedef struct lnm_http_res {
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lnm_http_status status;
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struct {
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lnm_http_res_header *head;
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lnm_http_res_header *current;
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} headers;
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struct {
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struct {
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char *buf;
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FILE *f;
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data_fn fn;
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} data;
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uint64_t len;
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bool owned;
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lnm_http_res_body_type type;
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} body;
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// General-purpose; meaning depends on the current state
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uint64_t written;
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} lnm_http_res;
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/**
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* Add a new header of a known type to the response
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*
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* @param type type of header
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* @param value null-terminated string containing the value of the header
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* @param value_owned whether to take ownership of the value pointer; if false,
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* free'ing the buffer is the caller's responsibility
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*/
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lnm_err lnm_http_res_add_header(lnm_http_res *res, lnm_http_header type,
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char *value, bool value_owned);
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/**
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* Add a new header of a known type to the response with a given value length.
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*
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* @param type type of header
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* @param value string of length `value_len` containing the value of the header
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* @param value_len length of value
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* @param value_owned whether to take ownership of the value pointer; if false,
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* free'ing the buffer is the caller's responsibility
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*/
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lnm_err lnm_http_res_add_header_len(lnm_http_res *res, lnm_http_header type,
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char *value, size_t value_len,
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bool value_owned);
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/**
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* Set the request body to the given file pointer.
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*
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* @param res response to modify
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* @param f file pointer to use as data
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* @param len expected length of the file
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* @param owned whether to take ownership of the file pointer
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*/
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void lnm_http_res_body_set_file(lnm_http_res *res, FILE *f, size_t len,
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bool owned);
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/**
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* Set the request body to the given buffer.
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*
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* @param res response to modify
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* @param buf buffer to use as data
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* @param len length of the buffer
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* @param owned whether to take ownership of the file pointer
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*/
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void lnm_http_res_body_set_buf(lnm_http_res *res, char *buf, size_t len,
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bool owned);
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/**
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* Set the request body to be read from the given data function.
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*
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* @param res response to modify
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* @param fn data reader function
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* @param len expected length of the response
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*/
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void lnm_http_res_body_set_fn(lnm_http_res *res, data_fn fn, size_t len);
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/**
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* Reset the given response object, properly free'ing any allocated buffers,
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* allowing it to be reused for later connections.
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*
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* @param res res to reset
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*/
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void lnm_http_res_reset(lnm_http_res *res);
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#endif
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