blob: 25faf4428b7529e39b6960135d76188aae039edc [file] [log] [blame] [raw]
/*
copyright: Boaz segev, 2016-2017
license: MIT
Feel free to copy, use and enjoy according to the license provided.
*/
#define _GNU_SOURCE
#include "http.h"
#include "http1.h"
#include <signal.h>
#include <string.h>
#include <strings.h>
#include <time.h>
/* *****************************************************************************
The global HTTP protocol
***************************************************************************** */
/**
Return the callback used for creating the correct `settings` HTTP protocol.
*/
http_on_open_func http_get_on_open_func(http_settings_s *settings) {
static void *route[2] = {(void *)http1_on_open};
return (http_on_open_func)route[settings->version];
}
/**
Return the callback used for freeing the HTTP protocol in the `settings`.
*/
http_on_finish_func http_get_on_finish_func(http_settings_s *settings) {
static void *route[2] = {NULL};
return (http_on_finish_func)route[settings->version];
}
void http_on_finish(intptr_t uuid, void *set) {
http_settings_s *settings = set;
if (http_get_on_finish_func(set))
http_get_on_finish_func(set)(set);
if (settings->on_finish)
settings->on_finish(uuid, settings->udata);
if (settings->private_metaflags & 2) {
free((void *)settings->public_folder);
free(settings);
}
(void)uuid;
}
/**
Listens for incoming HTTP connections on the specified posrt and address,
implementing the requested settings.
Since facil.io doesn't support native TLS/SLL
*/
#undef http_listen
int http_listen(const char *port, const char *address,
http_settings_s arg_settings) {
if (arg_settings.on_request == NULL) {
fprintf(
stderr,
"ERROR: http_listen requires the .on_request parameter to be set\n");
kill(0, SIGINT), exit(11);
}
http_on_open_func on_open_callback = http_get_on_open_func(&arg_settings);
if (!on_open_callback) {
fprintf(stderr, "ERROR: The requested HTTP protocol version isn't "
"supported at the moment.\n");
kill(0, SIGINT), exit(11);
}
http_settings_s *settings = malloc(sizeof(*settings));
*settings = arg_settings;
settings->private_metaflags = 2;
if (!settings->max_body_size)
settings->max_body_size = HTTP_DEFAULT_BODY_LIMIT;
if (!settings->timeout)
settings->timeout = 5;
if (settings->public_folder) {
settings->public_folder_length = strlen(settings->public_folder);
if (settings->public_folder[0] == '~' &&
settings->public_folder[1] == '/' && getenv("HOME")) {
char *home = getenv("HOME");
size_t home_len = strlen(home);
char *tmp = malloc(settings->public_folder_length + home_len + 1);
memcpy(tmp, home, home_len);
if (home[home_len - 1] == '/')
--home_len;
memcpy(tmp + home_len, settings->public_folder + 1,
settings->public_folder_length); // copy also the NULL
settings->public_folder = tmp;
settings->public_folder_length = strlen(settings->public_folder);
} else {
settings->public_folder = malloc(settings->public_folder_length + 1);
memcpy((void *)settings->public_folder, arg_settings.public_folder,
settings->public_folder_length);
((uint8_t *)settings->public_folder)[settings->public_folder_length] = 0;
}
}
return facil_listen(.port = port, .address = address,
.set_rw_hooks = arg_settings.set_rw_hooks,
.rw_udata = arg_settings.rw_udata,
.on_finish_rw = arg_settings.on_finish_rw,
.on_finish = http_on_finish, .on_open = on_open_callback,
.udata = settings);
}
/* *****************************************************************************
HTTP helpers.
***************************************************************************** */
/**
A faster (yet less localized) alternative to `gmtime_r`.
See the libc `gmtime_r` documentation for details.
Falls back to `gmtime_r` for dates before epoch.
*/
struct tm *http_gmtime(const time_t *timer, struct tm *tmbuf) {
// static char* DAYS[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
// static char * Months = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
// "Jul",
// "Aug", "Sep", "Oct", "Nov", "Dec"};
static uint8_t month_len[] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, // nonleap year
31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 // leap year
};
if (*timer < 0)
return gmtime_r(timer, tmbuf);
ssize_t tmp;
tmbuf->tm_gmtoff = 0;
tmbuf->tm_zone = "UTC";
tmbuf->tm_isdst = 0;
tmbuf->tm_year = 70; // tm_year == The number of years since 1900
tmbuf->tm_mon = 0;
// for seconds up to weekdays, we build up, as small values clean up larger
// values.
tmp = ((ssize_t)*timer);
tmbuf->tm_sec = tmp % 60;
tmp = tmp / 60;
tmbuf->tm_min = tmp % 60;
tmp = tmp / 60;
tmbuf->tm_hour = tmp % 24;
tmp = tmp / 24;
// day of epoch was a thursday. Add + 3 so sunday == 0...
tmbuf->tm_wday = (tmp + 3) % 7;
// tmp == number of days since epoch
#define DAYS_PER_400_YEARS ((400 * 365) + 97)
while (tmp >= DAYS_PER_400_YEARS) {
tmbuf->tm_year += 400;
tmp -= DAYS_PER_400_YEARS;
}
#undef DAYS_PER_400_YEARS
#define DAYS_PER_100_YEARS ((100 * 365) + 24)
while (tmp >= DAYS_PER_100_YEARS) {
tmbuf->tm_year += 100;
tmp -= DAYS_PER_100_YEARS;
if (((tmbuf->tm_year / 100) & 3) ==
0) // leap century divisable by 400 => add leap
--tmp;
}
#undef DAYS_PER_100_YEARS
#define DAYS_PER_32_YEARS ((32 * 365) + 8)
while (tmp >= DAYS_PER_32_YEARS) {
tmbuf->tm_year += 32;
tmp -= DAYS_PER_32_YEARS;
}
#undef DAYS_PER_32_YEARS
#define DAYS_PER_8_YEARS ((8 * 365) + 2)
while (tmp >= DAYS_PER_8_YEARS) {
tmbuf->tm_year += 8;
tmp -= DAYS_PER_8_YEARS;
}
#undef DAYS_PER_8_YEARS
#define DAYS_PER_4_YEARS ((4 * 365) + 1)
while (tmp >= DAYS_PER_4_YEARS) {
tmbuf->tm_year += 4;
tmp -= DAYS_PER_4_YEARS;
}
#undef DAYS_PER_4_YEARS
while (tmp >= 365) {
tmbuf->tm_year += 1;
tmp -= 365;
if ((tmbuf->tm_year & 3) == 0) { // leap year
if (tmp > 0) {
--tmp;
continue;
} else {
tmp += 365;
--tmbuf->tm_year;
break;
}
}
}
tmbuf->tm_yday = tmp;
if ((tmbuf->tm_year & 3) == 1) {
// regular year
for (size_t i = 0; i < 12; i++) {
if (tmp < month_len[i])
break;
tmp -= month_len[i];
++tmbuf->tm_mon;
}
} else {
// leap year
for (size_t i = 12; i < 24; i++) {
if (tmp < month_len[i])
break;
tmp -= month_len[i];
++tmbuf->tm_mon;
}
}
tmbuf->tm_mday = tmp;
return tmbuf;
}
static char *DAY_NAMES[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
static char *MONTH_NAMES[] = {"Jan ", "Feb ", "Mar ", "Apr ", "May ", "Jun ",
"Jul ", "Aug ", "Sep ", "Oct ", "Nov ", "Dec "};
static const char *GMT_STR = "GMT";
size_t http_date2str(char *target, struct tm *tmbuf) {
char *pos = target;
uint16_t tmp;
*(uint32_t *)pos = *((uint32_t *)DAY_NAMES[tmbuf->tm_wday]);
pos[3] = ',';
pos[4] = ' ';
pos += 5;
if (tmbuf->tm_mday < 10) {
*pos = '0' + tmbuf->tm_mday;
++pos;
} else {
tmp = tmbuf->tm_mday / 10;
pos[0] = '0' + tmp;
pos[1] = '0' + (tmbuf->tm_mday - (tmp * 10));
pos += 2;
}
*(pos++) = ' ';
*(uint32_t *)pos = *((uint32_t *)MONTH_NAMES[tmbuf->tm_mon]);
pos += 4;
// write year.
pos += http_ul2a(pos, tmbuf->tm_year + 1900);
*(pos++) = ' ';
tmp = tmbuf->tm_hour / 10;
pos[0] = '0' + tmp;
pos[1] = '0' + (tmbuf->tm_hour - (tmp * 10));
pos[2] = ':';
tmp = tmbuf->tm_min / 10;
pos[3] = '0' + tmp;
pos[4] = '0' + (tmbuf->tm_min - (tmp * 10));
pos[5] = ':';
tmp = tmbuf->tm_sec / 10;
pos[6] = '0' + tmp;
pos[7] = '0' + (tmbuf->tm_sec - (tmp * 10));
pos += 8;
pos[0] = ' ';
*((uint32_t *)(pos + 1)) = *((uint32_t *)GMT_STR);
pos += 4;
return pos - target;
}
/* Credit to Jonathan Leffler for the idea of a unified conditional */
#define hex_val(c) \
(((c) >= '0' && (c) <= '9') \
? ((c)-48) \
: (((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F')) \
? (((c) | 32) - 87) \
: ({ \
return -1; \
0; \
}))
static inline int hex2byte(uint8_t *dest, const uint8_t *source) {
if (source[0] >= '0' && source[0] <= '9')
*dest = (source[0] - '0');
else if ((source[0] >= 'a' && source[0] <= 'f') ||
(source[0] >= 'A' && source[0] <= 'F'))
*dest = (source[0] | 32) - 87;
else
return -1;
*dest <<= 4;
if (source[1] >= '0' && source[1] <= '9')
*dest |= (source[1] - '0');
else if ((source[1] >= 'a' && source[1] <= 'f') ||
(source[1] >= 'A' && source[1] <= 'F'))
*dest |= (source[1] | 32) - 87;
else
return -1;
return 0;
}
ssize_t http_decode_url(char *dest, const char *url_data, size_t length) {
char *pos = dest;
const char *end = url_data + length;
while (url_data < end) {
if (*url_data == '+') {
// decode space
*(pos++) = ' ';
++url_data;
} else if (*url_data == '%') {
// decode hex value
// this is a percent encoded value.
if (hex2byte((uint8_t *)pos, (uint8_t *)&url_data[1]))
return -1;
pos++;
url_data += 3;
} else
*(pos++) = *(url_data++);
}
*pos = 0;
return pos - dest;
}
ssize_t http_decode_url_unsafe(char *dest, const char *url_data) {
char *pos = dest;
while (*url_data) {
if (*url_data == '+') {
// decode space
*(pos++) = ' ';
++url_data;
} else if (*url_data == '%') {
// decode hex value
// this is a percent encoded value.
if (hex2byte((uint8_t *)pos, (uint8_t *)&url_data[1]))
return -1;
pos++;
url_data += 3;
} else
*(pos++) = *(url_data++);
}
*pos = 0;
return pos - dest;
}
ssize_t http_decode_path(char *dest, const char *url_data, size_t length) {
char *pos = dest;
const char *end = url_data + length;
while (url_data < end) {
if (*url_data == '%') {
// decode hex value
// this is a percent encoded value.
if (hex2byte((uint8_t *)pos, (uint8_t *)&url_data[1]))
return -1;
pos++;
url_data += 3;
} else
*(pos++) = *(url_data++);
}
*pos = 0;
return pos - dest;
}
ssize_t http_decode_path_unsafe(char *dest, const char *url_data) {
char *pos = dest;
while (*url_data) {
if (*url_data == '%') {
// decode hex value
// this is a percent encoded value.
if (hex2byte((uint8_t *)pos, (uint8_t *)&url_data[1]))
return -1;
pos++;
url_data += 3;
} else
*(pos++) = *(url_data++);
}
*pos = 0;
return pos - dest;
}
#undef hex_val