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wine-wine/dlls/winhttp/url.c

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/*
* Copyright 2008 Hans Leidekker for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <wchar.h>
#include "windef.h"
#include "winbase.h"
#include "ws2tcpip.h"
#include "winreg.h"
#include "winhttp.h"
#include "shlwapi.h"
#include "wine/debug.h"
#include "winhttp_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(winhttp);
struct url_component
{
WCHAR **str;
DWORD *len;
};
static DWORD set_component( struct url_component *comp, WCHAR *value, DWORD len, DWORD flags, BOOL *overflow )
{
if (*comp->str && !*comp->len) return ERROR_INVALID_PARAMETER;
if (!*comp->len) return ERROR_SUCCESS;
if (!*comp->str)
{
if (len && *comp->len && (flags & (ICU_DECODE|ICU_ESCAPE))) return ERROR_INVALID_PARAMETER;
*comp->str = value;
*comp->len = len;
}
else
{
if (len >= *comp->len)
{
*comp->len = len + 1;
*overflow = TRUE;
return ERROR_SUCCESS;
}
memcpy( *comp->str, value, len * sizeof(WCHAR) );
(*comp->str)[len] = 0;
*comp->len = len;
}
return ERROR_SUCCESS;
}
static WCHAR *decode_url( LPCWSTR url, DWORD *len )
{
const WCHAR *p = url;
WCHAR hex[3], *q, *ret;
if (!(ret = heap_alloc( *len * sizeof(WCHAR) ))) return NULL;
q = ret;
while (*len > 0)
{
if (p[0] == '%' && iswxdigit( p[1] ) && iswxdigit( p[2] ))
{
hex[0] = p[1];
hex[1] = p[2];
hex[2] = 0;
*q++ = wcstol( hex, NULL, 16 );
p += 3;
*len -= 3;
}
else
{
*q++ = *p++;
*len -= 1;
}
}
*len = q - ret;
return ret;
}
static inline BOOL need_escape( WCHAR ch )
{
const WCHAR *p = L" \"#%<>[\\]^`{|}~";
if (ch <= 31 || ch >= 127) return TRUE;
while (*p)
{
if (ch == *p++) return TRUE;
}
return FALSE;
}
static BOOL escape_string( const WCHAR *src, DWORD src_len, WCHAR *dst, DWORD *dst_len )
{
static const WCHAR hex[] = L"0123456789ABCDEF";
WCHAR *p = dst;
DWORD i;
*dst_len = src_len;
for (i = 0; i < src_len; i++)
{
if (src[i] > 0xff) return FALSE;
if (need_escape( src[i] ))
{
if (dst)
{
p[0] = '%';
p[1] = hex[(src[i] >> 4) & 0xf];
p[2] = hex[src[i] & 0xf];
p += 3;
}
*dst_len += 2;
}
else if (dst) *p++ = src[i];
}
if (dst) dst[*dst_len] = 0;
return TRUE;
}
static DWORD escape_url( const WCHAR *url, DWORD *len, WCHAR **ret )
{
const WCHAR *p;
DWORD len_base, len_path;
if ((p = wcsrchr( url, '/' )))
{
len_base = p - url;
if (!escape_string( p, *len - len_base, NULL, &len_path )) return ERROR_INVALID_PARAMETER;
}
else
{
len_base = *len;
len_path = 0;
}
if (!(*ret = heap_alloc( (len_base + len_path + 1) * sizeof(WCHAR) ))) return ERROR_OUTOFMEMORY;
memcpy( *ret, url, len_base * sizeof(WCHAR) );
if (p) escape_string( p, *len - (p - url), *ret + len_base, &len_path );
(*ret)[len_base + len_path] = 0;
*len = len_base + len_path;
return ERROR_SUCCESS;
}
static DWORD parse_port( const WCHAR *str, DWORD len, INTERNET_PORT *ret )
{
const WCHAR *p = str;
DWORD port = 0;
while (len && '0' <= *p && *p <= '9')
{
if ((port = port * 10 + *p - '0') > 65535) return ERROR_WINHTTP_INVALID_URL;
p++; len--;
}
*ret = port;
return ERROR_SUCCESS;
}
/***********************************************************************
* WinHttpCrackUrl (winhttp.@)
*/
BOOL WINAPI WinHttpCrackUrl( LPCWSTR url, DWORD len, DWORD flags, LPURL_COMPONENTSW uc )
{
WCHAR *p, *q, *r, *url_decoded = NULL, *url_escaped = NULL;
INTERNET_SCHEME scheme_number = 0;
struct url_component scheme, username, password, hostname, path, extra;
BOOL overflow = FALSE;
DWORD err;
TRACE("%s, %d, %x, %p\n", debugstr_wn(url, len), len, flags, uc);
if (!url || !uc || uc->dwStructSize != sizeof(*uc))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
if (!len) len = lstrlenW( url );
if (flags & ICU_ESCAPE)
{
if ((err = escape_url( url, &len, &url_escaped )))
{
SetLastError( err );
return FALSE;
}
url = url_escaped;
}
else if (flags & ICU_DECODE)
{
if (!(url_decoded = decode_url( url, &len )))
{
SetLastError( ERROR_OUTOFMEMORY );
return FALSE;
}
url = url_decoded;
}
if (!(p = wcschr( url, ':' )))
{
SetLastError( ERROR_WINHTTP_UNRECOGNIZED_SCHEME );
return FALSE;
}
if (p - url == 4 && !wcsnicmp( url, L"http", 4 )) scheme_number = INTERNET_SCHEME_HTTP;
else if (p - url == 5 && !wcsnicmp( url, L"https", 5 )) scheme_number = INTERNET_SCHEME_HTTPS;
else
{
err = ERROR_WINHTTP_UNRECOGNIZED_SCHEME;
goto exit;
}
scheme.str = &uc->lpszScheme;
scheme.len = &uc->dwSchemeLength;
if ((err = set_component( &scheme, (WCHAR *)url, p - url, flags, &overflow ))) goto exit;
p++; /* skip ':' */
if (!p[0] || p[0] != '/' || p[1] != '/')
{
err = ERROR_WINHTTP_INVALID_URL;
goto exit;
}
p += 2;
if (!p[0])
{
err = ERROR_WINHTTP_INVALID_URL;
goto exit;
}
username.str = &uc->lpszUserName;
username.len = &uc->dwUserNameLength;
password.str = &uc->lpszPassword;
password.len = &uc->dwPasswordLength;
if ((q = wmemchr( p, '@', len - (p - url) )) && !(wmemchr( p, '/', q - p )))
{
if ((r = wmemchr( p, ':', q - p )))
{
if ((err = set_component( &username, p, r - p, flags, &overflow ))) goto exit;
r++;
if ((err = set_component( &password, r, q - r, flags, &overflow ))) goto exit;
}
else
{
if ((err = set_component( &username, p, q - p, flags, &overflow ))) goto exit;
if ((err = set_component( &password, NULL, 0, flags, &overflow ))) goto exit;
}
p = q + 1;
}
else
{
if ((err = set_component( &username, NULL, 0, flags, &overflow ))) goto exit;
if ((err = set_component( &password, NULL, 0, flags, &overflow ))) goto exit;
}
hostname.str = &uc->lpszHostName;
hostname.len = &uc->dwHostNameLength;
path.str = &uc->lpszUrlPath;
path.len = &uc->dwUrlPathLength;
extra.str = &uc->lpszExtraInfo;
extra.len = &uc->dwExtraInfoLength;
if ((q = wmemchr( p, '/', len - (p - url) )))
{
if ((r = wmemchr( p, ':', q - p )))
{
if ((err = set_component( &hostname, p, r - p, flags, &overflow ))) goto exit;
r++;
if ((err = parse_port( r, q - r, &uc->nPort ))) goto exit;
}
else
{
if ((err = set_component( &hostname, p, q - p, flags, &overflow ))) goto exit;
if (scheme_number == INTERNET_SCHEME_HTTP) uc->nPort = INTERNET_DEFAULT_HTTP_PORT;
if (scheme_number == INTERNET_SCHEME_HTTPS) uc->nPort = INTERNET_DEFAULT_HTTPS_PORT;
}
if ((r = wmemchr( q, '?', len - (q - url) )))
{
if (*extra.len)
{
if ((err = set_component( &path, q, r - q, flags, &overflow ))) goto exit;
if ((err = set_component( &extra, r, len - (r - url), flags, &overflow ))) goto exit;
}
else if ((err = set_component( &path, q, len - (q - url), flags, &overflow ))) goto exit;
}
else
{
if ((err = set_component( &path, q, len - (q - url), flags, &overflow ))) goto exit;
if ((err = set_component( &extra, (WCHAR *)url + len, 0, flags, &overflow ))) goto exit;
}
}
else
{
if ((r = wmemchr( p, ':', len - (p - url) )))
{
if ((err = set_component( &hostname, p, r - p, flags, &overflow ))) goto exit;
r++;
if ((err = parse_port( r, len - (r - url), &uc->nPort ))) goto exit;
}
else
{
if ((err = set_component( &hostname, p, len - (p - url), flags, &overflow ))) goto exit;
if (scheme_number == INTERNET_SCHEME_HTTP) uc->nPort = INTERNET_DEFAULT_HTTP_PORT;
if (scheme_number == INTERNET_SCHEME_HTTPS) uc->nPort = INTERNET_DEFAULT_HTTPS_PORT;
}
if ((err = set_component( &path, (WCHAR *)url + len, 0, flags, &overflow ))) goto exit;
if ((err = set_component( &extra, (WCHAR *)url + len, 0, flags, &overflow ))) goto exit;
}
TRACE("scheme(%s) host(%s) port(%d) path(%s) extra(%s)\n", debugstr_wn(*scheme.str, *scheme.len),
debugstr_wn(*hostname.str, *hostname.len ), uc->nPort, debugstr_wn(*path.str, *path.len),
debugstr_wn(*extra.str, *extra.len));
exit:
if (!err)
{
if (overflow) err = ERROR_INSUFFICIENT_BUFFER;
uc->nScheme = scheme_number;
}
heap_free( url_decoded );
heap_free( url_escaped );
SetLastError( err );
return !err;
}
static INTERNET_SCHEME get_scheme( const WCHAR *scheme, DWORD len )
{
if (!wcsncmp( scheme, L"http", len )) return INTERNET_SCHEME_HTTP;
if (!wcsncmp( scheme, L"https", len )) return INTERNET_SCHEME_HTTPS;
return 0;
}
static const WCHAR *get_scheme_string( INTERNET_SCHEME scheme )
{
if (scheme == INTERNET_SCHEME_HTTP) return L"http";
if (scheme == INTERNET_SCHEME_HTTPS) return L"https";
return NULL;
}
static BOOL uses_default_port( INTERNET_SCHEME scheme, INTERNET_PORT port )
{
if ((scheme == INTERNET_SCHEME_HTTP) && (port == INTERNET_DEFAULT_HTTP_PORT)) return TRUE;
if ((scheme == INTERNET_SCHEME_HTTPS) && (port == INTERNET_DEFAULT_HTTPS_PORT)) return TRUE;
return FALSE;
}
static DWORD get_comp_length( DWORD len, DWORD flags, WCHAR *comp )
{
DWORD ret;
unsigned int i;
ret = len ? len : lstrlenW( comp );
if (!(flags & ICU_ESCAPE)) return ret;
for (i = 0; i < len; i++) if (need_escape( comp[i] )) ret += 2;
return ret;
}
static BOOL get_url_length( URL_COMPONENTS *uc, DWORD flags, DWORD *len )
{
INTERNET_SCHEME scheme;
*len = 0;
if (uc->lpszScheme)
{
DWORD scheme_len = get_comp_length( uc->dwSchemeLength, 0, uc->lpszScheme );
*len += scheme_len;
scheme = get_scheme( uc->lpszScheme, scheme_len );
}
else
{
scheme = uc->nScheme;
if (!scheme) scheme = INTERNET_SCHEME_HTTP;
*len += lstrlenW( get_scheme_string( scheme ) );
}
*len += 3; /* "://" */
if (uc->lpszUserName)
{
*len += get_comp_length( uc->dwUserNameLength, 0, uc->lpszUserName );
*len += 1; /* "@" */
}
else
{
if (uc->lpszPassword)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
}
if (uc->lpszPassword)
{
*len += 1; /* ":" */
*len += get_comp_length( uc->dwPasswordLength, 0, uc->lpszPassword );
}
if (uc->lpszHostName)
{
*len += get_comp_length( uc->dwHostNameLength, 0, uc->lpszHostName );
if (!uses_default_port( scheme, uc->nPort ))
{
WCHAR port[sizeof("65535")];
*len += swprintf( port, ARRAY_SIZE(port), L"%u", uc->nPort );
*len += 1; /* ":" */
}
if (uc->lpszUrlPath && *uc->lpszUrlPath != '/') *len += 1; /* '/' */
}
if (uc->lpszUrlPath) *len += get_comp_length( uc->dwUrlPathLength, flags, uc->lpszUrlPath );
if (uc->lpszExtraInfo) *len += get_comp_length( uc->dwExtraInfoLength, flags, uc->lpszExtraInfo );
return TRUE;
}
/***********************************************************************
* WinHttpCreateUrl (winhttp.@)
*/
BOOL WINAPI WinHttpCreateUrl( LPURL_COMPONENTS uc, DWORD flags, LPWSTR url, LPDWORD required )
{
DWORD len, len_escaped;
INTERNET_SCHEME scheme;
TRACE("%p, 0x%08x, %p, %p\n", uc, flags, url, required);
if (!uc || uc->dwStructSize != sizeof(URL_COMPONENTS) || !required)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
if (!get_url_length( uc, flags, &len )) return FALSE;
if (*required < len)
{
*required = len + 1;
SetLastError( ERROR_INSUFFICIENT_BUFFER );
return FALSE;
}
if (!url)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
url[0] = 0;
*required = len;
if (uc->lpszScheme)
{
len = get_comp_length( uc->dwSchemeLength, 0, uc->lpszScheme );
memcpy( url, uc->lpszScheme, len * sizeof(WCHAR) );
url += len;
scheme = get_scheme( uc->lpszScheme, len );
}
else
{
const WCHAR *schemeW;
scheme = uc->nScheme;
if (!scheme) scheme = INTERNET_SCHEME_HTTP;
schemeW = get_scheme_string( scheme );
len = lstrlenW( schemeW );
memcpy( url, schemeW, len * sizeof(WCHAR) );
url += len;
}
*url++ = ':';
*url++ = '/';
*url++ = '/';
if (uc->lpszUserName)
{
len = get_comp_length( uc->dwUserNameLength, 0, uc->lpszUserName );
memcpy( url, uc->lpszUserName, len * sizeof(WCHAR) );
url += len;
if (uc->lpszPassword)
{
*url++ = ':';
len = get_comp_length( uc->dwPasswordLength, 0, uc->lpszPassword );
memcpy( url, uc->lpszPassword, len * sizeof(WCHAR) );
url += len;
}
*url++ = '@';
}
if (uc->lpszHostName)
{
len = get_comp_length( uc->dwHostNameLength, 0, uc->lpszHostName );
memcpy( url, uc->lpszHostName, len * sizeof(WCHAR) );
url += len;
if (!uses_default_port( scheme, uc->nPort ))
{
*url++ = ':';
url += swprintf( url, sizeof("65535"), L"%u", uc->nPort );
}
/* add slash between hostname and path if necessary */
if (uc->lpszUrlPath && *uc->lpszUrlPath != '/')
{
*url++ = '/';
}
}
if (uc->lpszUrlPath)
{
len = get_comp_length( uc->dwUrlPathLength, 0, uc->lpszUrlPath );
if (flags & ICU_ESCAPE)
{
if (!escape_string( uc->lpszUrlPath, len, url, &len_escaped ))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
url += len_escaped;
}
else
{
memcpy( url, uc->lpszUrlPath, len * sizeof(WCHAR) );
url += len;
}
}
if (uc->lpszExtraInfo)
{
len = get_comp_length( uc->dwExtraInfoLength, 0, uc->lpszExtraInfo );
if (flags & ICU_ESCAPE)
{
if (!escape_string( uc->lpszExtraInfo, len, url, &len_escaped ))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
url += len_escaped;
}
else
{
memcpy( url, uc->lpszExtraInfo, len * sizeof(WCHAR) );
url += len;
}
}
*url = 0;
SetLastError( ERROR_SUCCESS );
return TRUE;
}
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