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/**
@file httprotocol.h
@brief HTTP protocol
This file is part of harvid
@author Robin Gareus <robin@gareus.org>
@copyright
Copyright (C) 2002,2003,2008-2013 Robin Gareus <robin@gareus.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _HTTPROTOCOL_H
#define _HTTPROTOCOL_H
#include <stdlib.h>
#include <stdint.h>
#include <time.h>
#ifdef HAVE_WINDOWS
#include <windows.h>
#include <winsock.h>
#endif
#define DOCTYPE "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"\n\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"
#define HTMLOPEN "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n<head><meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\" />\n"
#define PROTOCOL "HTTP/1.0" ///< HTTP protocol version for replies
#define RFC1123FMT "%a, %d %b %Y %H:%M:%S GMT" ///< time format used in HTTP header
#ifdef HAVE_WINDOWS
#define SL_SEP(string) (strlen(string)>0?(string[strlen(string)-1]=='/' || string[strlen(string)-1]=='\\')?"":"\\":"")
#else
#define SL_SEP(string) (strlen(string)>0?(string[strlen(string)-1]=='/')?"":"/":"")
#endif
#ifndef uint8_t
#define uint8_t unsigned char
#endif
#ifndef socklen_t
#define socklen_t int
#endif
#ifndef HAVE_WINDOWS
#define CSEND(FD,MSG) write(FD, MSG, strlen(MSG))
#else
#define CSEND(FD,MSG) send(FD, MSG, strlen(MSG), 0)
#endif
/**
* @brief HTTP header
*
* interanl representation of a HTTP header to be sent with http_tx()
*/
typedef struct {
size_t length; ///< Content-Length (default: 0 - not sent)
time_t mtime; ///< Last-Modified (default: 0 - don't send this header)
char *extra; ///< any additional HTTP header "key:value" - if not NULL '\\r\\n' is appended to this string.
char *encoding; ///< Content-Encoding (default: NUll - not sent)
char *ctype; ///< Content-type (default: text/html)
char *retryafter; ///< for 503 errors: Retry-After time value in seconds (default: 5)
} httpheader;
/**
* send a HTTP error reply.
* @param fd socket file descriptor
* @param s HTTP status code
* @param title optional HTTP status-code message (may be NULL)
* @param str optional text body explaining the error (may be NULL)
*/
void httperror(int fd , int s, const char *title, const char *str);
/**
* send HTTP reply status, header and transmit data.
* @param fd socket file descriptor
* @param s HTTP status code (usually 200)
* @param h HTTP header information to send
* @param len number of bytes to send
* @param buf data to send
*/
int http_tx(int fd, int s, httpheader *h, size_t len, const uint8_t *buf);
/**
* internal, private function to send the HTTP status line
* @param fd socket file descriptor
* @param status HTTP status code
*/
const char * send_http_status_fd (int fd, int status);
/**
* internal function to format and send HTTP header
* @param fd socket file descriptor
* @param s HTTP status code
* @param h HTTP header information to send
*/
void send_http_header_fd(int fd , int s, httpheader *h);
/**
*/
char *url_unescape(const char *string, int length, int *olen);
/**
*/
char *url_escape(const char *string, int inlength);
#endif
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