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lighttpd2/src/utils.c

257 lines
6.0 KiB

#include "utils.h"
#include <stdio.h>
#include <stdlib.h>
void fatal(const gchar* msg) {
fprintf(stderr, "%s\n", msg);
abort();
}
void fd_init(int fd) {
#ifdef _WIN32
int i = 1;
#endif
#ifdef FD_CLOEXEC
/* close fd on exec (cgi) */
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
#ifdef O_NONBLOCK
fcntl(fd, F_SETFL, O_NONBLOCK | O_RDWR);
#elif defined _WIN32
ioctlsocket(fd, FIONBIO, &i);
#endif
}
void ev_io_add_events(struct ev_loop *loop, ev_io *watcher, int events) {
if ((watcher->events & events) == events) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events | events);
ev_io_start(loop, watcher);
}
void ev_io_rem_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (0 == (watcher->events & events)) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events & ~events);
ev_io_start(loop, watcher);
}
void ev_io_set_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (events == (watcher->events & (EV_READ | EV_WRITE))) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, (watcher->events & ~(EV_READ | EV_WRITE)) | events);
ev_io_start(loop, watcher);
}
/* converts hex char (0-9, A-Z, a-z) to decimal.
* returns -1 on invalid input.
*/
static int hex2int(unsigned char hex) {
int res;
if (hex >= 'A') { /* 'A' < 'a': hex >= 'A' --> hex >= 'a' */
if (hex >= 'a') {
res = hex - 'a' + 10;
} else {
res = hex - 'A' + 10;
}
} else {
res = hex - '0';
}
if (res > 15)
res = -1;
return res;
}
void url_decode(GString *path) {
char *src, *dst, c;
src = dst = path->str;
for ( ; *src; src++) {
c = *src;
if (c == '%') {
if (src[1] && src[2]) {
int a = hex2int(src[1]), b = hex2int(src[2]);
if (a != -1 && b != -1) {
c = (a << 4) | b;
if (c < 32 || c == 127) c = '_';
*(dst++) = c;
}
src += 2;
} else {
/* end of string */
return;
}
} else {
if (c < 32 || c == 127) c = '_';
*(dst++) = c;
}
}
g_string_set_size(path, dst - path->str);
}
/* Remove "/../", "//", "/./" parts from path.
*
* /blah/.. gets /
* /blah/../foo gets /foo
* /abc/./xyz gets /abc/xyz
* /abc//xyz gets /abc/xyz
*
* NOTE: src and dest can point to the same buffer, in which case
* the operation is performed in-place.
*/
void path_simplify(GString *path) {
int toklen;
char c, pre1;
char *start, *slash, *walk, *out;
unsigned short pre;
if (path == NULL)
return;
walk = start = out = slash = path->str;
while (*walk == ' ') {
walk++;
}
pre1 = *(walk++);
c = *(walk++);
pre = pre1;
if (pre1 != '/') {
pre = ('/' << 8) | pre1;
*(out++) = '/';
}
*(out++) = pre1;
if (pre1 == '\0') {
g_string_set_size(path, out - start);
return;
}
while (1) {
if (c == '/' || c == '\0') {
toklen = out - slash;
if (toklen == 3 && pre == (('.' << 8) | '.')) {
out = slash;
if (out > start) {
out--;
while (out > start && *out != '/') {
out--;
}
}
if (c == '\0')
out++;
} else if (toklen == 1 || pre == (('/' << 8) | '.')) {
out = slash;
if (c == '\0')
out++;
}
slash = out;
}
if (c == '\0')
break;
pre1 = c;
pre = (pre << 8) | pre1;
c = *walk;
*out = pre1;
out++;
walk++;
}
g_string_set_size(path, out - start);
}
gchar *http_status_string(guint status_code) {
/* RFC 2616 (as well as RFC 2518, RFC 2817, RFC 2295, RFC 2774, RFC 4918) */
switch (status_code) {
/* 1XX information */
case 100: return "Continue";
case 101: return "Switching Protocols";
case 102: return "Processing";
/* 2XX successful operation */
case 200: return "OK";
case 201: return "Created";
case 202: return "Accepted";
case 203: return "Non-Authoritative Information";
case 204: return "No Content";
case 205: return "Reset Content";
case 206: return "Partial Content";
case 207: return "Multi-Status";
/* 3XX redirect */
case 300: return "Multiple Choice";
case 301: return "Moved Permanently";
case 302: return "Found";
case 303: return "See Other";
case 304: return "Not Modified";
case 305: return "Use Proxy";
case 306: return "(reserved)";
case 307: return "Temporary Redirect";
/* 4XX client error */
case 400: return "Bad Request";
case 401: return "Unauthorized";
case 402: return "Payment Required";
case 403: return "Forbidden";
case 404: return "Not Found";
case 405: return "Method Not Allowed";
case 406: return "Not Acceptable";
case 407: return "Proxy Authentication Required";
case 408: return "Request Time-out";
case 409: return "Conflict";
case 410: return "Gone";
case 411: return "Length Required";
case 412: return "Precondition Failed";
case 413: return "Request Entity Too Large";
case 414: return "Request-URI Too Long";
case 415: return "Unsupported Media Type";
case 416: return "Request range not satisfiable";
case 417: return "Expectation Failed";
case 421: return "There are too many connections from your internet address";
case 422: return "Unprocessable Entity";
case 423: return "Locked";
case 424: return "Failed Dependency";
case 425: return "Unordered Collection";
case 426: return "Upgrade Required";
/* 5XX server error */
case 500: return "Internal Server Error";
case 501: return "Not Implemented";
case 502: return "Bad Gateway";
case 503: return "Service Unavailable";
case 504: return "Gateway Time-out";
case 505: return "HTTP Version not supported";
case 506: return "Variant Also Negotiates";
case 507: return "Insufficient Storage";
case 509: return "Bandwidth Limit Exceeded";
case 510: return "Not Extended";
/* unknown */
default: return "unknown status";
}
}
gchar counter_format(guint64 *count, guint factor) {
gchar suffix = 0;
if (*count > factor) { *count /= factor; suffix = 'k';
if (*count > factor) { *count /= factor; suffix = 'm';
if (*count > factor) { *count /= factor; suffix = 'g';
if (*count > factor) { *count /= factor; suffix = 't';
if (*count > factor) { *count /= factor; suffix = 'p';
if (*count > factor) { *count /= factor; suffix = 'e'; }
}
}
}
}
}
return suffix;
}