mshtml: Don't crash in QueryInterface if uri is NULL.
[wine] / dlls / urlmon / file.c
1 /*
2  * Copyright 2005 Jacek Caban
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
17  */
18
19 #include <stdarg.h>
20
21 #define COBJMACROS
22
23 #include "windef.h"
24 #include "winbase.h"
25 #include "winuser.h"
26 #include "ole2.h"
27 #include "urlmon.h"
28 #include "urlmon_main.h"
29
30 #include "wine/debug.h"
31
32 WINE_DEFAULT_DEBUG_CHANNEL(urlmon);
33
34 typedef struct {
35     const IInternetProtocolVtbl  *lpInternetProtocolVtbl;
36     const IInternetPriorityVtbl  *lpInternetPriorityVtbl;
37
38     HANDLE file;
39     LONG priority;
40
41     LONG ref;
42 } FileProtocol;
43
44 #define PROTOCOL(x)  ((IInternetProtocol*)  &(x)->lpInternetProtocolVtbl)
45 #define PRIORITY(x)  ((IInternetPriority*)  &(x)->lpInternetPriorityVtbl)
46
47 #define PROTOCOL_THIS(iface) DEFINE_THIS(FileProtocol, InternetProtocol, iface)
48
49 static HRESULT WINAPI FileProtocol_QueryInterface(IInternetProtocol *iface, REFIID riid, void **ppv)
50 {
51     FileProtocol *This = PROTOCOL_THIS(iface);
52
53     *ppv = NULL;
54     if(IsEqualGUID(&IID_IUnknown, riid)) {
55         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
56         *ppv = PROTOCOL(This);
57     }else if(IsEqualGUID(&IID_IInternetProtocolRoot, riid)) {
58         TRACE("(%p)->(IID_IInternetProtocolRoot %p)\n", This, ppv);
59         *ppv = PROTOCOL(This);
60     }else if(IsEqualGUID(&IID_IInternetProtocol, riid)) {
61         TRACE("(%p)->(IID_IInternetProtocol %p)\n", This, ppv);
62         *ppv = PROTOCOL(This);
63     }else if(IsEqualGUID(&IID_IInternetPriority, riid)) {
64         TRACE("(%p)->(IID_IInternetPriority %p)\n", This, ppv);
65         *ppv = PRIORITY(This);
66     }
67
68     if(*ppv) {
69         IInternetProtocol_AddRef(iface);
70         return S_OK;
71     }
72
73     WARN("not supported interface %s\n", debugstr_guid(riid));
74     return E_NOINTERFACE;
75 }
76
77 static ULONG WINAPI FileProtocol_AddRef(IInternetProtocol *iface)
78 {
79     FileProtocol *This = PROTOCOL_THIS(iface);
80     LONG ref = InterlockedIncrement(&This->ref);
81     TRACE("(%p) ref=%ld\n", This, ref);
82     return ref;
83 }
84
85 static ULONG WINAPI FileProtocol_Release(IInternetProtocol *iface)
86 {
87     FileProtocol *This = PROTOCOL_THIS(iface);
88     LONG ref = InterlockedDecrement(&This->ref);
89
90     TRACE("(%p) ref=%ld\n", This, ref);
91
92     if(!ref) {
93         if(This->file)
94             CloseHandle(This->file);
95         HeapFree(GetProcessHeap(), 0, This);
96
97         URLMON_UnlockModule();
98     }
99
100     return ref;
101 }
102
103 static HRESULT WINAPI FileProtocol_Start(IInternetProtocol *iface, LPCWSTR szUrl,
104         IInternetProtocolSink *pOIProtSink, IInternetBindInfo *pOIBindInfo,
105         DWORD grfPI, DWORD dwReserved)
106 {
107     FileProtocol *This = PROTOCOL_THIS(iface);
108     BINDINFO bindinfo;
109     DWORD grfBINDF = 0;
110     LARGE_INTEGER size;
111     DWORD len;
112     LPWSTR url, mime = NULL;
113     LPCWSTR file_name;
114     WCHAR null_char = 0;
115     BOOL first_call = FALSE;
116     HRESULT hres;
117
118     static const WCHAR wszFile[]  = {'f','i','l','e',':'};
119
120     TRACE("(%p)->(%s %p %p %08lx %ld)\n", This, debugstr_w(szUrl), pOIProtSink,
121             pOIBindInfo, grfPI, dwReserved);
122
123     memset(&bindinfo, 0, sizeof(bindinfo));
124     bindinfo.cbSize = sizeof(BINDINFO);
125     IInternetBindInfo_GetBindInfo(pOIBindInfo, &grfBINDF, &bindinfo);
126
127     if(lstrlenW(szUrl) < sizeof(wszFile)/sizeof(WCHAR)
128             || memcmp(szUrl, wszFile, sizeof(wszFile)))
129         return MK_E_SYNTAX;
130
131     len = lstrlenW(szUrl)+16;
132     url = HeapAlloc(GetProcessHeap(), 0, len*sizeof(WCHAR));
133     hres = CoInternetParseUrl(szUrl, PARSE_ENCODE, 0, url, len, &len, 0);
134     if(FAILED(hres)) {
135         HeapFree(GetProcessHeap(), 0, url);
136         return hres;
137     }
138
139     if(!(grfBINDF & BINDF_FROMURLMON))
140         IInternetProtocolSink_ReportProgress(pOIProtSink, BINDSTATUS_DIRECTBIND, NULL);
141
142     if(!This->file) {
143         first_call = TRUE;
144
145         IInternetProtocolSink_ReportProgress(pOIProtSink, BINDSTATUS_SENDINGREQUEST, &null_char);
146
147         file_name = url+sizeof(wszFile)/sizeof(WCHAR);
148         if(file_name[0] == '/' && file_name[1] == '/')
149             file_name += 2;
150         if(*file_name == '/')
151             file_name++;
152
153         This->file = CreateFileW(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
154                                  OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
155
156         if(This->file == INVALID_HANDLE_VALUE) {
157             This->file = NULL;
158             IInternetProtocolSink_ReportResult(pOIProtSink, INET_E_RESOURCE_NOT_FOUND,
159                     GetLastError(), NULL);
160             HeapFree(GetProcessHeap(), 0, url);
161             return INET_E_RESOURCE_NOT_FOUND;
162         }
163
164         IInternetProtocolSink_ReportProgress(pOIProtSink,
165                 BINDSTATUS_CACHEFILENAMEAVAILABLE, file_name);
166
167         hres = FindMimeFromData(NULL, url, NULL, 0, NULL, 0, &mime, 0);
168         if(SUCCEEDED(hres)) {
169             IInternetProtocolSink_ReportProgress(pOIProtSink,
170                     (grfBINDF & BINDF_FROMURLMON) ?
171                     BINDSTATUS_VERIFIEDMIMETYPEAVAILABLE : BINDSTATUS_MIMETYPEAVAILABLE,
172                     mime);
173             CoTaskMemFree(mime);
174         }
175     }
176
177     HeapFree(GetProcessHeap(), 0, url);
178
179     if(GetFileSizeEx(This->file, &size))
180         IInternetProtocolSink_ReportData(pOIProtSink,
181                 BSCF_FIRSTDATANOTIFICATION|BSCF_LASTDATANOTIFICATION,
182                 size.u.LowPart, size.u.LowPart);
183
184     if(first_call)
185         IInternetProtocolSink_ReportResult(pOIProtSink, S_OK, 0, NULL);
186
187     return S_OK;
188 }
189
190 static HRESULT WINAPI FileProtocol_Continue(IInternetProtocol *iface, PROTOCOLDATA *pProtocolData)
191 {
192     FileProtocol *This = PROTOCOL_THIS(iface);
193     FIXME("(%p)->(%p)\n", This, pProtocolData);
194     return E_NOTIMPL;
195 }
196
197 static HRESULT WINAPI FileProtocol_Abort(IInternetProtocol *iface, HRESULT hrReason,
198         DWORD dwOptions)
199 {
200     FileProtocol *This = PROTOCOL_THIS(iface);
201     FIXME("(%p)->(%08lx %08lx)\n", This, hrReason, dwOptions);
202     return E_NOTIMPL;
203 }
204
205 static HRESULT WINAPI FileProtocol_Terminate(IInternetProtocol *iface, DWORD dwOptions)
206 {
207     FileProtocol *This = PROTOCOL_THIS(iface);
208
209     TRACE("(%p)->(%08lx)\n", This, dwOptions);
210
211     return S_OK;
212 }
213
214 static HRESULT WINAPI FileProtocol_Suspend(IInternetProtocol *iface)
215 {
216     FileProtocol *This = PROTOCOL_THIS(iface);
217     FIXME("(%p)\n", This);
218     return E_NOTIMPL;
219 }
220
221 static HRESULT WINAPI FileProtocol_Resume(IInternetProtocol *iface)
222 {
223     FileProtocol *This = PROTOCOL_THIS(iface);
224     FIXME("(%p)\n", This);
225     return E_NOTIMPL;
226 }
227
228 static HRESULT WINAPI FileProtocol_Read(IInternetProtocol *iface, void *pv,
229         ULONG cb, ULONG *pcbRead)
230 {
231     FileProtocol *This = PROTOCOL_THIS(iface);
232     DWORD read = 0;
233
234     TRACE("(%p)->(%p %lu %p)\n", This, pv, cb, pcbRead);
235
236     if(!This->file)
237         return INET_E_DATA_NOT_AVAILABLE;
238
239     ReadFile(This->file, pv, cb, &read, NULL);
240
241     if(pcbRead)
242         *pcbRead = read;
243     
244     return cb == read ? S_OK : S_FALSE;
245 }
246
247 static HRESULT WINAPI FileProtocol_Seek(IInternetProtocol *iface, LARGE_INTEGER dlibMove,
248         DWORD dwOrgin, ULARGE_INTEGER *plibNewPosition)
249 {
250     FileProtocol *This = PROTOCOL_THIS(iface);
251     FIXME("(%p)->(%ld %ld %p)\n", This, dlibMove.u.LowPart, dwOrgin, plibNewPosition);
252     return E_NOTIMPL;
253 }
254
255 static HRESULT WINAPI FileProtocol_LockRequest(IInternetProtocol *iface, DWORD dwOptions)
256 {
257     FileProtocol *This = PROTOCOL_THIS(iface);
258
259     TRACE("(%p)->(%08lx)\n", This, dwOptions);
260
261     return S_OK;
262 }
263
264 static HRESULT WINAPI FileProtocol_UnlockRequest(IInternetProtocol *iface)
265 {
266     FileProtocol *This = PROTOCOL_THIS(iface);
267
268     TRACE("(%p)\n", This);
269
270     return S_OK;
271 }
272
273 #undef PROTOCOL_THIS
274
275 static const IInternetProtocolVtbl FileProtocolVtbl = {
276     FileProtocol_QueryInterface,
277     FileProtocol_AddRef,
278     FileProtocol_Release,
279     FileProtocol_Start,
280     FileProtocol_Continue,
281     FileProtocol_Abort,
282     FileProtocol_Terminate,
283     FileProtocol_Suspend,
284     FileProtocol_Resume,
285     FileProtocol_Read,
286     FileProtocol_Seek,
287     FileProtocol_LockRequest,
288     FileProtocol_UnlockRequest
289 };
290
291 #define PRIORITY_THIS(iface) DEFINE_THIS(FileProtocol, InternetPriority, iface)
292
293 static HRESULT WINAPI FilePriority_QueryInterface(IInternetPriority *iface,
294                                                   REFIID riid, void **ppv)
295 {
296     FileProtocol *This = PRIORITY_THIS(iface);
297     return IInternetProtocol_QueryInterface(PROTOCOL(This), riid, ppv);
298 }
299
300 static ULONG WINAPI FilePriority_AddRef(IInternetPriority *iface)
301 {
302     FileProtocol *This = PRIORITY_THIS(iface);
303     return IInternetProtocol_AddRef(PROTOCOL(This));
304 }
305
306 static ULONG WINAPI FilePriority_Release(IInternetPriority *iface)
307 {
308     FileProtocol *This = PRIORITY_THIS(iface);
309     return IInternetProtocol_Release(PROTOCOL(This));
310 }
311
312 static HRESULT WINAPI FilePriority_SetPriority(IInternetPriority *iface, LONG nPriority)
313 {
314     FileProtocol *This = PRIORITY_THIS(iface);
315
316     TRACE("(%p)->(%ld)\n", This, nPriority);
317
318     This->priority = nPriority;
319     return S_OK;
320 }
321
322 static HRESULT WINAPI FilePriority_GetPriority(IInternetPriority *iface, LONG *pnPriority)
323 {
324     FileProtocol *This = PRIORITY_THIS(iface);
325
326     TRACE("(%p)->(%p)\n", This, pnPriority);
327
328     *pnPriority = This->priority;
329     return S_OK;
330 }
331
332 #undef PRIORITY_THIS
333
334 static const IInternetPriorityVtbl FilePriorityVtbl = {
335     FilePriority_QueryInterface,
336     FilePriority_AddRef,
337     FilePriority_Release,
338     FilePriority_SetPriority,
339     FilePriority_GetPriority
340 };
341
342 HRESULT FileProtocol_Construct(IUnknown *pUnkOuter, LPVOID *ppobj)
343 {
344     FileProtocol *ret;
345
346     TRACE("(%p %p)\n", pUnkOuter, ppobj);
347
348     URLMON_LockModule();
349
350     ret = HeapAlloc(GetProcessHeap(), 0, sizeof(FileProtocol));
351
352     ret->lpInternetProtocolVtbl = &FileProtocolVtbl;
353     ret->lpInternetPriorityVtbl = &FilePriorityVtbl;
354     ret->file = NULL;
355     ret->priority = 0;
356     ret->ref = 1;
357
358     *ppobj = PROTOCOL(ret);
359     
360     return S_OK;
361 }