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/*
* HTTP Cookies
* Reads Netscape and Mozilla cookies.txt files
*
* by Dave Lambley <mplayer@davel.me.uk>
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <inttypes.h>
#include <limits.h>
#include "cookies.h"
#include "http.h"
#include "mp_msg.h"
#define MAX_COOKIES 20
char *cookies_file = NULL;
typedef struct cookie_list_type {
char *name;
char *value;
char *domain;
char *path;
int secure;
struct cookie_list_type *next;
} cookie_list_t;
/* Pointer to the linked list of cookies */
static struct cookie_list_type *cookie_list = NULL;
/* Like strdup, but stops at anything <31. */
static char *col_dup(const char *src)
{
char *dst;
int length = 0;
while (src[length] > 31)
length++;
dst = malloc(length + 1);
strncpy(dst, src, length);
dst[length] = 0;
return dst;
}
static int right_hand_strcmp(const char *cookie_domain, const char *url_domain)
{
int c_l;
int u_l;
c_l = strlen(cookie_domain);
u_l = strlen(url_domain);
if (c_l > u_l)
return -1;
return strcmp(cookie_domain, url_domain + u_l - c_l);
}
static int left_hand_strcmp(const char *cookie_path, const char *url_path)
{
return strncmp(cookie_path, url_path, strlen(cookie_path));
}
/* Finds the start of all the columns */
static int parse_line(char **ptr, char *cols[6])
{
int col;
cols[0] = *ptr;
for (col = 1; col < 7; col++) {
for (; (**ptr) > 31; (*ptr)++);
if (**ptr == 0)
return 0;
(*ptr)++;
if ((*ptr)[-1] != 9)
return 0;
cols[col] = (*ptr);
}
return 1;
}
/* Loads a file into RAM */
static char *load_file(const char *filename, off_t * length)
{
int fd;
char *buffer;
mp_msg(MSGT_NETWORK, MSGL_V, "Loading cookie file: %s\n", filename);
fd = open(filename, O_RDONLY);
if (fd < 0) {
mp_msg(MSGT_NETWORK, MSGL_V, "Could not open");
return NULL;
}
*length = lseek(fd, 0, SEEK_END);
if (*length < 0) {
mp_msg(MSGT_NETWORK, MSGL_V, "Could not find EOF");
return NULL;
}
if (*length > SIZE_MAX - 1) {
mp_msg(MSGT_NETWORK, MSGL_V, "File too big, could not malloc.");
return NULL;
}
lseek(fd, SEEK_SET, 0);
if (!(buffer = malloc(*length + 1))) {
mp_msg(MSGT_NETWORK, MSGL_V, "Could not malloc.");
return NULL;
}
if (read(fd, buffer, *length) != *length) {
mp_msg(MSGT_NETWORK, MSGL_V, "Read is behaving funny.");
return NULL;
}
close(fd);
buffer[*length] = 0;
return buffer;
}
/* Loads a cookies.txt file into a linked list. */
static struct cookie_list_type *load_cookies_from(const char *filename,
struct cookie_list_type
*list)
{
char *ptr;
off_t length;
mp_msg(MSGT_NETWORK, MSGL_V, "Loading cookie file: %s\n", filename);
ptr = load_file(filename, &length);
if (!ptr)
return list;
while (*ptr > 0) {
char *cols[7];
if (parse_line(&ptr, cols)) {
struct cookie_list_type *new;
new = malloc(sizeof(cookie_list_t));
new->name = col_dup(cols[5]);
new->value = col_dup(cols[6]);
new->path = col_dup(cols[2]);
new->domain = col_dup(cols[0]);
new->secure = (*(cols[3]) == 't') || (*(cols[3]) == 'T');
new->next = list;
list = new;
}
}
return list;
}
/* Attempt to load cookies.txt from various locations. Returns a pointer to the linked list contain the cookies. */
static struct cookie_list_type *load_cookies(void)
{
DIR *dir;
struct dirent *ent;
struct cookie_list_type *list = NULL;
char *buf;
char *homedir;
if (cookies_file)
return load_cookies_from(cookies_file, list);
homedir = getenv("HOME");
if (!homedir)
return list;
buf = malloc(strlen(homedir) + sizeof("/.mozilla/default") + 1);
sprintf(buf, "%s/.mozilla/default", homedir);
dir = opendir(buf);
free(buf);
if (dir) {
while ((ent = readdir(dir)) != NULL) {
if ((ent->d_name)[0] != '.') {
buf = malloc(strlen(getenv("HOME")) +
sizeof("/.mozilla/default/") +
strlen(ent->d_name) + sizeof("cookies.txt") + 1);
sprintf(buf, "%s/.mozilla/default/%s/cookies.txt",
getenv("HOME"), ent->d_name);
list = load_cookies_from(buf, list);
free(buf);
}
}
closedir(dir);
}
buf = malloc(strlen(homedir) + sizeof("/.netscape/cookies.txt") + 1);
sprintf(buf, "%s/.netscape/cookies.txt", homedir);
list = load_cookies_from(buf, list);
free(buf);
return list;
}
/* Take an HTTP_header_t, and insert the correct headers. The cookie files are read if necessary. */
void
cookies_set(HTTP_header_t * http_hdr, const char *domain, const char *url)
{
int found_cookies = 0;
struct cookie_list_type *cookies[MAX_COOKIES];
struct cookie_list_type *list, *start;
int i;
char *path;
char *buf;
path = strchr(url, '/');
if (!path)
path = "";
if (!cookie_list)
cookie_list = load_cookies();
list = start = cookie_list;
/* Find which cookies we want, removing duplicates. Cookies with the longest domain, then longest path take priority */
while (list) {
/* Check the cookie domain and path. Also, we never send "secure" cookies. These should only be sent over HTTPS. */
if ((right_hand_strcmp(list->domain, domain) == 0)
&& (left_hand_strcmp(list->path, path) == 0) && !list->secure) {
int replacing = 0;
for (i = 0; i < found_cookies; i++) {
if (strcmp(list->name, cookies[i]->name) == 0) {
replacing = 0;
if (strlen(list->domain) <= strlen(cookies[i]->domain)) {
cookies[i] = list;
} else if (strlen(list->path) <= strlen(cookies[i]->path)) {
cookies[i] = list;
}
}
}
if (found_cookies > MAX_COOKIES) {
/* Cookie jar overflow! */
break;
}
if (!replacing)
cookies[found_cookies++] = list;
}
list = list->next;
}
buf = strdup("Cookie:");
for (i = 0; i < found_cookies; i++) {
char *nbuf;
nbuf = malloc(strlen(buf) + strlen(" ") + strlen(cookies[i]->name) +
strlen("=") + strlen(cookies[i]->value) + strlen(";") + 1);
sprintf(nbuf, "%s %s=%s;", buf, cookies[i]->name,
cookies[i]->value);
free(buf);
buf = nbuf;
}
if (found_cookies)
http_set_field(http_hdr, buf);
else
free(buf);
}
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