/*
* Scan, allocate, and set things according to header info.
* (This function needs the whole header to work)
*/
static void Cache_parse_header(CacheEntry_t *entry)
{
char *header = entry->Header->str;
char *Length, *Type, *location_str, *encoding;
#ifndef DISABLE_COOKIES
Dlist *Cookies;
#endif
Dlist *warnings;
void *data;
int i;
_MSG("Cache_parse_header\n");
if (entry->Header->len > 12) {
if (header[9] == '1' && header[10] == '0' && header[11] == '0') {
/* 100: Continue. The "real" header has not come yet. */
MSG("An actual 100 Continue header!\n");
entry->Flags &= ~CA_GotHeader;
dStr_free(entry->Header, 1);
entry->Header = dStr_new("");
return;
}
if (header[9] == '3' && header[10] == '0' &&
(location_str = Cache_parse_field(header, "Location"))) {
/* 30x: URL redirection */
DilloUrl *location_url = a_Url_new(location_str,URL_STR_(entry->Url));
if (prefs.filter_auto_requests == PREFS_FILTER_SAME_DOMAIN &&
!a_Url_same_organization(entry->Url, location_url)) {
/* don't redirect; just show body like usual (if any) */
MSG("Redirection not followed from %s to %s\n",
URL_HOST(entry->Url), URL_STR(location_url));
a_Url_free(location_url);
} else {
entry->Flags |= CA_Redirect;
if (header[11] == '1')
entry->Flags |= CA_ForceRedirect; /* 301 Moved Permanently */
else if (header[11] == '2')
entry->Flags |= CA_TempRedirect; /* 302 Temporary Redirect */
if (URL_FLAGS(location_url) & (URL_Post + URL_Get) &&
dStrAsciiCasecmp(URL_SCHEME(location_url), "dpi") == 0 &&
dStrAsciiCasecmp(URL_SCHEME(entry->Url), "dpi") != 0) {
/* Forbid dpi GET and POST from non dpi-generated urls */
MSG("Redirection Denied! '%s' -> '%s'\n",
URL_STR(entry->Url), URL_STR(location_url));
a_Url_free(location_url);
} else {
entry->Location = location_url;
}
}
dFree(location_str);
} else if (strncmp(header + 9, "401", 3) == 0) {
entry->Auth =
Cache_parse_multiple_fields(header, "WWW-Authenticate");
} else if (strncmp(header + 9, "404", 3) == 0) {
entry->Flags |= CA_NotFound;
}
}
if ((warnings = Cache_parse_multiple_fields(header, "Warning"))) {
for (i = 0; (data = dList_nth_data(warnings, i)); ++i) {
MSG_HTTP("%s\n", (char *)data);
dFree(data);
}
dList_free(warnings);
}
/*
* Get Transfer-Encoding and initialize decoder
*/
encoding = Cache_parse_field(header, "Transfer-Encoding");
entry->TransferDecoder = a_Decode_transfer_init(encoding);
if ((Length = Cache_parse_field(header, "Content-Length")) != NULL) {
if (encoding) {
/*
* If Transfer-Encoding is present, Content-Length must be ignored.
* If the Transfer-Encoding is non-identity, it is an error.
*/
if (dStrAsciiCasecmp(encoding, "identity"))
MSG_HTTP("Content-Length and non-identity Transfer-Encoding "
"headers both present.\n");
} else {
entry->Flags |= CA_GotLength;
entry->ExpectedSize = MAX(strtol(Length, NULL, 10), 0);
}
dFree(Length);
}
dFree(encoding); /* free Transfer-Encoding */
#ifndef DISABLE_COOKIES
if ((Cookies = Cache_parse_multiple_fields(header, "Set-Cookie"))) {
CacheClient_t *client;
for (i = 0; (client = dList_nth_data(ClientQueue, i)); ++i) {
if (client->Url == entry->Url) {
DilloWeb *web = client->Web;
if (!web->requester ||
a_Url_same_organization(entry->Url, web->requester)) {
char *server_date = Cache_parse_field(header, "Date");
a_Cookies_set(Cookies, entry->Url, server_date);
dFree(server_date);
break;
}
}
}
if (i >= dList_length(ClientQueue)) {
MSG("Cache: cookies not accepted from '%s'\n", URL_STR(entry->Url));
}
for (i = 0; (data = dList_nth_data(Cookies, i)); ++i)
dFree(data);
dList_free(Cookies);
}
#endif /* !DISABLE_COOKIES */
/*
* Get Content-Encoding and initialize decoder
*/
encoding = Cache_parse_field(header, "Content-Encoding");
entry->ContentDecoder = a_Decode_content_init(encoding);
dFree(encoding);
if (entry->ExpectedSize > 0) {
if (entry->ExpectedSize > HUGE_FILESIZE) {
entry->Flags |= CA_HugeFile;
}
/* Avoid some reallocs. With MAX_INIT_BUF we avoid a SEGFAULT
* with huge files (e.g. iso files).
* Note: the buffer grows automatically. */
dStr_free(entry->Data, 1);
entry->Data = dStr_sized_new(MIN(entry->ExpectedSize, MAX_INIT_BUF));
}
/* Get Content-Type */
if ((Type = Cache_parse_field(header, "Content-Type"))) {
/* This HTTP Content-Type is not trusted. It's checked against real data
* in Cache_process_queue(); only then CA_GotContentType becomes true. */
a_Cache_set_content_type(entry->Url, Type, "http");
_MSG("TypeHdr {%s} {%s}\n", Type, URL_STR(entry->Url));
_MSG("TypeMeta {%s}\n", entry->TypeMeta);
dFree(Type);
}
Cache_ref_data(entry);
}
/*
* Set the Content-Type for the URL.
*/
const char *a_Capi_set_content_type(const DilloUrl *url, const char *ctype,
const char *from)
{
return a_Cache_set_content_type(url, ctype, from);
}
