//
using system.runtime.interopservices;
[structlayout(layoutkind.sequential, charset
=
charset.auto)]
public
struct
internet_cache_entry_info
...
{
public
int
dwstructsize;
public
intptr lpszsourceurlname;
public
intptr lpszlocalfilename;
public
int
cacheentrytype;
public
int
dwusecount;
public
int
dwhitrate;
public
int
dwsizelow;
public
int
dwsizehigh;
public
filetime lastmodifiedtime;
public
filetime expiretime;
public
filetime lastaccesstime;
public
filetime lastsynctime;
public
intptr lpheaderinfo;
public
int
dwheaderinfosize;
public
intptr lpszfileextension;
public
int
dwexemptdelta;
}
[dllimport(
"
wininet.dll
"
, setlasterror
=
true
, charset
=
charset.auto)]
public
static
extern
intptr findfirsturlcacheentry([marshalas(unmanagedtype.lptstr)]
string
urlsearchpattern, intptr lpfirstcacheentryinfo,
ref
int
lpdwfirstcacheentryinfobuffersize);
[dllimport(
"
wininet.dll
"
, setlasterror
=
true
, charset
=
charset.auto)]
public
static
extern
bool
geturlcacheentryinfo( [marshalas(unmanagedtype.lptstr)]
string
lpszurlname, intptr lpcacheentryinfo,
ref
int
lpdwcacheentryinfobuffersize );
public
static
string
getcatchfilename(
string
url)
...
{
int
nneeded
=
0
, nbufsize;
intptr buf;
findfirsturlcacheentry(
null
, intptr.zero,
ref
nneeded );
nbufsize
=
nneeded; buf
=
marshal.allochglobal( nbufsize );
geturlcacheentryinfo(url,buf,
ref
nneeded);
internet_cache_entry_info cacheitem;
geturlcacheentryinfo(url,buf,
ref
nneeded);
cacheitem
=
(internet_cache_entry_info) marshal.ptrtostructure( buf,
typeof
(internet_cache_entry_info) );
string
res
=
marshal.ptrtostringauto(cacheitem.lpszlocalfilename);
return
(res);
}
