lander/include/http.h

#ifndef HTTP
#define HTTP

#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>

#include "picohttpparser.h"

#define HTTP_MAX_ALLOWED_HEADERS 16
#define HTTP_MAX_REGEX_GROUPS 4

extern const char *http_response_type_names[5][32];
extern const char *http_header_names[];

typedef enum http_request_method {
  http_get = 0,
  http_post = 1,
  http_put = 2,
  http_patch = 3,
  http_delete = 4
} http_request_method;

extern const char *request_method_names[];
extern const size_t request_method_names_len;

typedef enum http_body_type {
  http_body_buf = 0,
  http_body_file = 1
} http_body_type;

/*
 * Struct representing the specific type of request
 */
typedef struct http_request {
  size_t len;
  int minor_version;
  http_request_method method;
  const char *path;
  size_t path_len;
  const char *query;
  size_t query_len;
  http_body_type body_type;
  union {
    char *buf;
    FILE *file;
  } body;
  size_t body_len;
  size_t body_received;
  regmatch_t regex_groups[HTTP_MAX_REGEX_GROUPS];
  struct phr_header headers[HTTP_MAX_ALLOWED_HEADERS];
  size_t num_headers;
} http_request;

typedef enum http_parse_error {
  http_parse_error_ok = 0,
  http_parse_error_incomplete = 1,
  http_parse_error_invalid = 2,
  http_parse_error_unknown_method = 3
} http_parse_error;

/* void http_route(event_loop_conn *conn); */

typedef enum http_response_type {
  // 1xx
  http_continue = 100,
  http_switching_protocols = 101,
  http_processing = 102,
  http_early_hints = 103,
  // 2xx
  http_ok = 200,
  http_created = 201,
  http_accepted = 202,
  http_non_authoritative_information = 203,
  http_no_content = 204,
  http_reset_content = 205,
  http_partial_content = 206,
  http_multi_status = 207,
  http_already_reported = 208,
  // 3xx
  http_multiple_choices = 300,
  http_moved_permanently = 301,
  http_found = 302,
  http_see_other = 303,
  http_not_modified = 304,
  http_temporary_redirect = 307,
  http_permanent_redirect = 308,
  // 4xx
  http_bad_request = 400,
  http_unauthorized = 401,
  http_payment_required = 402,
  http_forbidden = 403,
  http_not_found = 404,
  http_method_not_allowed = 405,
  http_not_acceptable = 406,
  http_proxy_authentication_required = 407,
  http_request_timeout = 408,
  http_conflict = 409,
  http_gone = 410,
  http_length_required = 411,
  http_precondition_failed = 412,
  http_content_too_large = 413,
  http_uri_too_long = 414,
  http_unsupported_media_type = 415,
  http_range_not_satisfiable = 416,
  http_expection_failed = 417,
  http_im_a_teapot = 418,
  http_misdirected_request = 421,
  http_unprocessable_content = 422,
  http_locked = 423,
  http_failed_dependency = 424,
  http_too_early = 425,
  http_upgrade_required = 426,
  http_precondition_required = 428,
  http_too_many_requests = 429,
  http_request_header_fields_too_large = 431,
  // 5xx
  http_internal_server_error = 500,
  http_method_not_implemented = 501,
  http_bad_gateway = 502,
  http_service_unavailable = 503,
  http_gateway_timeout = 504,
  http_http_version_not_supported = 505,
  http_variant_also_negotiates = 506,
  http_insufficient_storage = 507,
  http_loop_detected = 508,
  http_not_extended = 510,
  http_network_authentication_required = 511
} http_response_type;

typedef enum http_header {
  http_header_connection = 0,
  http_header_location = 1
} http_header;

typedef struct http_response_header {
  http_header type;
  const char *value;
  bool owned;
} http_response_header;

typedef struct http_response {
  http_response_type status;
  const char *head;
  size_t head_len;
  size_t head_written;
  http_body_type body_type;
  union {
    char *buf;
    FILE *file;
  } body;
  size_t body_len;
  size_t body_written;
  // If false, the body won't be freed
  bool owns_body;
  http_response_header headers[4];
  size_t header_count;
} http_response;

#endif