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// Copyright (c) 1996 James Clark
// See the file COPYING for copying permission.
#include "splib.h"
#ifdef SP_WININET
#include "WinInetStorage.h"
#include "WinInetStorageMessages.h"
#include "RewindStorageObject.h"
#include "UnivCharsetDesc.h"
#include "MessageArg.h"
#include "MessageBuilder.h"
#include "macros.h"
#define STRICT
#include <windows.h>
#include <wininet.h>
#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif
static UnivCharsetDesc::Range range = { 0, 128, 0 };
static CharsetInfo iso646Charset(UnivCharsetDesc(&range, 1));
String<char> toAscii(const StringC &buf)
{
String<char> s;
for (size_t i = 0; i < buf.size(); i++)
s += buf[i];
s += '\0';
return s;
}
class Win32MessageArg : public MessageArg {
public:
Win32MessageArg(DWORD n) : n_(n) { }
MessageArg *copy() const { return new Win32MessageArg(*this); }
void append(MessageBuilder &) const;
private:
DWORD n_;
};
void Win32MessageArg::append(MessageBuilder &builder) const
{
void *msg;
if (!FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM
|FORMAT_MESSAGE_ALLOCATE_BUFFER,
0,
n_,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR)&msg,
0,
0)) {
// FIXME interpret common internet messages here
builder.appendNumber(n_);
return;
}
String<Char> s;
for (char *tem = (char *)msg; *tem; tem++)
s += *tem;
LocalFree(msg);
builder.appendChars(s.data(), s.size());
}
class WinInetStorageObject : public RewindStorageObject {
public:
WinInetStorageObject(HINTERNET fd, Boolean mayRewind, const StringC &url);
~WinInetStorageObject();
Boolean read(char *buf, size_t bufSize, Messenger &mgr, size_t &nread);
Boolean seekToStart(Messenger &);
private:
WinInetStorageObject(const WinInetStorageObject &); // undefined
void operator=(const WinInetStorageObject &); // undefined
Boolean eof_;
HINTERNET fd_;
StringC url_;
};
WinInetStorageManager::WinInetStorageManager(const char *type)
: type_(type), IdStorageManager(&iso646Charset), session_(0)
{
}
WinInetStorageManager::~WinInetStorageManager()
{
if (session_) {
InternetCloseHandle(session_);
session_ = 0;
}
}
const char *WinInetStorageManager::type() const
{
return type_;
}
Boolean WinInetStorageManager::initSession()
{
if (!session_) {
session_ = InternetOpenA("SP",
INTERNET_OPEN_TYPE_PRECONFIG,
0,
0,
0);
}
return 1;
}
Boolean WinInetStorageManager::guessIsId(const StringC &id,
const CharsetInfo &charset) const
{
if (id.size() < 8)
return 0;
size_t i = 0;
// guess other schemes supported by download protocols
for (const char *s = "http://"; *s; s++, i++)
if (id[i] != charset.execToDesc(*s)
&& (!islower(*s) || id[i] != charset.execToDesc(toupper(*s))))
return 0;
return 1;
}
StorageObject *WinInetStorageManager::makeStorageObject(const StringC &specId,
const StringC &baseId,
Boolean,
Boolean mayRewind,
Messenger &mgr,
StringC &id)
{
if (!initSession())
return 0;
id = specId;
resolveRelative(baseId, id, 0);
String<char> tem(toAscii(id));
HINTERNET fd = InternetOpenUrlA(session_, tem.data(), 0, 0, 0, 0);
if (!fd) {
DWORD err = GetLastError();
mgr.message(WinInetStorageMessages::cannotOpen,
StringMessageArg(id),
Win32MessageArg(err));
return 0;
}
// FIXME report an error
return new WinInetStorageObject(fd, mayRewind, id);
}
Boolean WinInetStorageManager::resolveRelative(const StringC &baseId,
StringC &id,
Boolean) const
{
DWORD bufSize = baseId.size() + id.size() + 1;
char *buf = new char[bufSize];
String<char> baseIdA (toAscii(baseId));
String<char> idA(toAscii(id));
if (InternetCombineUrlA(baseIdA.data(),
idA.data(),
buf,
&bufSize,
0)) {
id.resize(0);
for (size_t i = 0; i < bufSize; i++)
id += buf[i];
delete [] buf;
return 1;
}
delete [] buf;
return 0;
}
Boolean WinInetStorageManager::transformNeutral(StringC &str, Boolean fold,
Messenger &) const
{
if (fold)
for (size_t i = 0; i < str.size(); i++) {
Char c = str[i];
if (c <= (unsigned char)-1)
str[i] = tolower(str[i]);
}
return 1;
}
WinInetStorageObject::WinInetStorageObject(HINTERNET fd,
Boolean mayRewind,
const StringC &url)
: RewindStorageObject(mayRewind, 0), fd_(fd), url_(url), eof_(0)
{
}
WinInetStorageObject::~WinInetStorageObject()
{
if (fd_ != 0) {
(void)InternetCloseHandle(fd_);
fd_ = 0;
}
}
Boolean WinInetStorageObject::read(char *buf, size_t bufSize, Messenger &mgr,
size_t &nread)
{
if (readSaved(buf, bufSize, nread))
return 1;
if (fd_ == 0 || eof_)
return 0;
DWORD n;
if (!InternetReadFile(fd_, buf, bufSize, &n)) {
DWORD err = GetLastError();
mgr.message(WinInetStorageMessages::readFailed,
StringMessageArg(url_),
Win32MessageArg(err));
return 0;
}
if (n) {
nread = n;
return 1;
}
eof_ = 1;
InternetCloseHandle(fd_);
fd_ = 0;
return 0;
}
Boolean WinInetStorageObject::seekToStart(Messenger &)
{
CANNOT_HAPPEN();
return 0;
}
#ifdef SP_NAMESPACE
}
#endif
#endif /* SP_WININET */
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