mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-24 03:59:43 +00:00
libavformat/http: Ignore expired cookies
Signed-off-by: Micah Galizia <micahgalizia@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Micah Galizia
Michael Niedermayer
parent
89812e423d
commit
28b2467074
@ -29,6 +29,7 @@
|
||||
#include "libavutil/avstring.h"
|
||||
#include "libavutil/opt.h"
|
||||
#include "libavutil/time.h"
|
||||
#include "libavutil/parseutils.h"
|
||||
|
||||
#include "avformat.h"
|
||||
#include "http.h"
|
||||
@ -48,6 +49,8 @@
|
||||
#define MAX_REDIRECTS 8
|
||||
#define HTTP_SINGLE 1
|
||||
#define HTTP_MUTLI 2
|
||||
#define MAX_EXPIRY 19
|
||||
#define WHITESPACES " \n\t\r"
|
||||
typedef enum {
|
||||
LOWER_PROTO,
|
||||
READ_HEADERS,
|
||||
@ -680,10 +683,112 @@ static int parse_icy(HTTPContext *s, const char *tag, const char *p)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int parse_set_cookie_expiry_time(const char *exp_str, struct tm *buf)
|
||||
{
|
||||
char exp_buf[MAX_EXPIRY];
|
||||
int i, j, exp_buf_len = MAX_EXPIRY-1;
|
||||
char *expiry;
|
||||
|
||||
// strip off any punctuation or whitespace
|
||||
for (i = 0, j = 0; exp_str[i] != '\0' && j < exp_buf_len; i++) {
|
||||
if ((exp_str[i] >= '0' && exp_str[i] <= '9') ||
|
||||
(exp_str[i] >= 'A' && exp_str[i] <= 'Z') ||
|
||||
(exp_str[i] >= 'a' && exp_str[i] <= 'z')) {
|
||||
exp_buf[j] = exp_str[i];
|
||||
j++;
|
||||
}
|
||||
}
|
||||
exp_buf[j] = '\0';
|
||||
expiry = exp_buf;
|
||||
|
||||
// move the string beyond the day of week
|
||||
while ((*expiry < '0' || *expiry > '9') && *expiry != '\0')
|
||||
expiry++;
|
||||
|
||||
return av_small_strptime(expiry, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
|
||||
}
|
||||
|
||||
static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
|
||||
{
|
||||
char *param, *next_param, *cstr, *back;
|
||||
|
||||
if (!(cstr = av_strdup(set_cookie)))
|
||||
return AVERROR(EINVAL);
|
||||
|
||||
// strip any trailing whitespace
|
||||
back = &cstr[strlen(cstr)-1];
|
||||
while (strchr(WHITESPACES, *back)) {
|
||||
*back='\0';
|
||||
back--;
|
||||
}
|
||||
|
||||
next_param = cstr;
|
||||
while ((param = av_strtok(next_param, ";", &next_param))) {
|
||||
char *name, *value;
|
||||
param += strspn(param, WHITESPACES);
|
||||
if ((name = av_strtok(param, "=", &value))) {
|
||||
if (av_dict_set(dict, name, value, 0) < 0) {
|
||||
av_free(cstr);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
av_free(cstr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
|
||||
{
|
||||
AVDictionary *new_params = NULL;
|
||||
AVDictionaryEntry *e, *cookie_entry;
|
||||
char *eql, *name;
|
||||
|
||||
// ensure the cookie is parsable
|
||||
if (parse_set_cookie(p, &new_params))
|
||||
return -1;
|
||||
|
||||
// if there is no cookie value there is nothing to parse
|
||||
cookie_entry = av_dict_get(new_params, "", NULL, AV_DICT_IGNORE_SUFFIX);
|
||||
if (!cookie_entry || !cookie_entry->value) {
|
||||
av_dict_free(&new_params);
|
||||
return -1;
|
||||
}
|
||||
|
||||
// ensure the cookie is not expired or older than an existing value
|
||||
if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
|
||||
struct tm new_tm = {0};
|
||||
if (!parse_set_cookie_expiry_time(e->value, &new_tm)) {
|
||||
AVDictionaryEntry *e2;
|
||||
|
||||
// if the cookie has already expired ignore it
|
||||
if (av_timegm(&new_tm) < av_gettime() / 1000000) {
|
||||
av_dict_free(&new_params);
|
||||
return -1;
|
||||
}
|
||||
|
||||
// only replace an older cookie with the same name
|
||||
e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
|
||||
if (e2 && e2->value) {
|
||||
AVDictionary *old_params = NULL;
|
||||
if (!parse_set_cookie(p, &old_params)) {
|
||||
e2 = av_dict_get(old_params, "expires", NULL, 0);
|
||||
if (e2 && e2->value) {
|
||||
struct tm old_tm = {0};
|
||||
if (!parse_set_cookie_expiry_time(e->value, &old_tm)) {
|
||||
if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
|
||||
av_dict_free(&new_params);
|
||||
av_dict_free(&old_params);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
av_dict_free(&old_params);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// duplicate the cookie name (dict will dupe the value)
|
||||
if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
|
||||
if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
|
||||
@ -868,7 +973,7 @@ static int get_cookies(HTTPContext *s, char **cookies, const char *path,
|
||||
// cookie strings will look like Set-Cookie header field values. Multiple
|
||||
// Set-Cookie fields will result in multiple values delimited by a newline
|
||||
int ret = 0;
|
||||
char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
|
||||
char *cookie, *set_cookies = av_strdup(s->cookies), *next = set_cookies;
|
||||
|
||||
if (!set_cookies) return AVERROR(EINVAL);
|
||||
|
||||
@ -876,87 +981,81 @@ static int get_cookies(HTTPContext *s, char **cookies, const char *path,
|
||||
av_dict_free(&s->cookie_dict);
|
||||
|
||||
*cookies = NULL;
|
||||
while ((cookie = av_strtok(set_cookies, "\n", &next))) {
|
||||
int domain_offset = 0;
|
||||
char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
|
||||
set_cookies = NULL;
|
||||
while ((cookie = av_strtok(next, "\n", &next))) {
|
||||
AVDictionary *cookie_params = NULL;
|
||||
AVDictionaryEntry *cookie_entry, *e;
|
||||
|
||||
// store the cookie in a dict in case it is updated in the response
|
||||
if (parse_cookie(s, cookie, &s->cookie_dict))
|
||||
av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
|
||||
|
||||
while ((param = av_strtok(cookie, "; ", &next_param))) {
|
||||
if (cookie) {
|
||||
// first key-value pair is the actual cookie value
|
||||
cvalue = av_strdup(param);
|
||||
cookie = NULL;
|
||||
} else if (!av_strncasecmp("path=", param, 5)) {
|
||||
av_free(cpath);
|
||||
cpath = av_strdup(¶m[5]);
|
||||
} else if (!av_strncasecmp("domain=", param, 7)) {
|
||||
// if the cookie specifies a sub-domain, skip the leading dot thereby
|
||||
// supporting URLs that point to sub-domains and the master domain
|
||||
int leading_dot = (param[7] == '.');
|
||||
av_free(cdomain);
|
||||
cdomain = av_strdup(¶m[7+leading_dot]);
|
||||
} else {
|
||||
// ignore unknown attributes
|
||||
// continue on to the next cookie if this one cannot be parsed
|
||||
if (parse_set_cookie(cookie, &cookie_params))
|
||||
continue;
|
||||
|
||||
// if the cookie has no value, skip it
|
||||
cookie_entry = av_dict_get(cookie_params, "", NULL, AV_DICT_IGNORE_SUFFIX);
|
||||
if (!cookie_entry || !cookie_entry->value) {
|
||||
av_dict_free(&cookie_params);
|
||||
continue;
|
||||
}
|
||||
|
||||
// if the cookie has expired, don't add it
|
||||
if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
|
||||
struct tm tm_buf = {0};
|
||||
if (!parse_set_cookie_expiry_time(e->value, &tm_buf)) {
|
||||
if (av_timegm(&tm_buf) < av_gettime() / 1000000) {
|
||||
av_dict_free(&cookie_params);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!cdomain)
|
||||
cdomain = av_strdup(domain);
|
||||
|
||||
// ensure all of the necessary values are valid
|
||||
if (!cdomain || !cpath || !cvalue) {
|
||||
av_log(s, AV_LOG_WARNING,
|
||||
"Invalid cookie found, no value, path or domain specified\n");
|
||||
goto done_cookie;
|
||||
// if no domain in the cookie assume it appied to this request
|
||||
if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
|
||||
// find the offset comparison is on the min domain (b.com, not a.b.com)
|
||||
int domain_offset = strlen(domain) - strlen(e->value);
|
||||
if (domain_offset < 0) {
|
||||
av_dict_free(&cookie_params);
|
||||
continue;
|
||||
}
|
||||
|
||||
// match the cookie domain
|
||||
if (av_strcasecmp(&domain[domain_offset], e->value)) {
|
||||
av_dict_free(&cookie_params);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
// check if the request path matches the cookie path
|
||||
if (av_strncasecmp(path, cpath, strlen(cpath)))
|
||||
goto done_cookie;
|
||||
|
||||
// the domain should be at least the size of our cookie domain
|
||||
domain_offset = strlen(domain) - strlen(cdomain);
|
||||
if (domain_offset < 0)
|
||||
goto done_cookie;
|
||||
|
||||
// match the cookie domain
|
||||
if (av_strcasecmp(&domain[domain_offset], cdomain))
|
||||
goto done_cookie;
|
||||
// ensure this cookie matches the path
|
||||
e = av_dict_get(cookie_params, "path", NULL, 0);
|
||||
if (!e || av_strncasecmp(path, e->value, strlen(e->value))) {
|
||||
av_dict_free(&cookie_params);
|
||||
continue;
|
||||
}
|
||||
|
||||
// cookie parameters match, so copy the value
|
||||
if (!*cookies) {
|
||||
if (!(*cookies = av_strdup(cvalue))) {
|
||||
if (!(*cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value))) {
|
||||
ret = AVERROR(ENOMEM);
|
||||
goto done_cookie;
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
char *tmp = *cookies;
|
||||
size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
|
||||
size_t str_size = strlen(cookie_entry->key) + strlen(cookie_entry->value) + strlen(*cookies) + 4;
|
||||
if (!(*cookies = av_malloc(str_size))) {
|
||||
ret = AVERROR(ENOMEM);
|
||||
goto done_cookie;
|
||||
av_free(tmp);
|
||||
break;
|
||||
}
|
||||
snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
|
||||
snprintf(*cookies, str_size, "%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
|
||||
av_free(tmp);
|
||||
}
|
||||
|
||||
done_cookie:
|
||||
av_freep(&cdomain);
|
||||
av_freep(&cpath);
|
||||
av_freep(&cvalue);
|
||||
if (ret < 0) {
|
||||
if (*cookies) av_freep(cookies);
|
||||
av_free(cset_cookies);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
av_free(cset_cookies);
|
||||
av_free(set_cookies);
|
||||
|
||||
return 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int has_header(const char *str, const char *header)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user