ReactOS 0.4.15-dev-8119-g4fb2fdb
asyncinet.h File Reference
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Classes

struct  __AsyncInet
 

Typedefs

typedef struct __AsyncInet ASYNCINET
 
typedef struct __AsyncInetpASYNCINET
 
typedef int(* ASYNCINET_CALLBACK) (pASYNCINET AsyncInet, ASYNC_EVENT Event, WPARAM wParam, LPARAM lParam, VOID *Extension)
 

Enumerations

enum  ASYNC_EVENT { ASYNCINET_DATA , ASYNCINET_COMPLETE , ASYNCINET_CANCELLED , ASYNCINET_ERROR }
 

Functions

pASYNCINET AsyncInetDownload (LPCWSTR lpszAgent, DWORD dwAccessType, LPCWSTR lpszProxy, LPCWSTR lpszProxyBypass, LPCWSTR lpszUrl, BOOL bAllowCache, ASYNCINET_CALLBACK Callback, VOID *Extension)
 
BOOL AsyncInetCancel (pASYNCINET AsyncInet)
 
VOID AsyncInetRelease (pASYNCINET AsyncInet)
 

Typedef Documentation

◆ ASYNCINET

Definition at line 19 of file asyncinet.h.

◆ ASYNCINET_CALLBACK

typedef int(* ASYNCINET_CALLBACK) (pASYNCINET AsyncInet, ASYNC_EVENT Event, WPARAM wParam, LPARAM lParam, VOID *Extension)

Definition at line 21 of file asyncinet.h.

◆ pASYNCINET

Definition at line 19 of file asyncinet.h.

Enumeration Type Documentation

◆ ASYNC_EVENT

Enumerator
ASYNCINET_DATA 
ASYNCINET_COMPLETE 
ASYNCINET_CANCELLED 
ASYNCINET_ERROR 

Definition at line 5 of file asyncinet.h.

6{
7 ASYNCINET_DATA, // wParam is the Data retrieved from the internet, lParam is the length of Data
8
9 ASYNCINET_COMPLETE, // wParam and lParam are not used.
10 // when receiving this, AsyncInet will be free soon and should not used anymore
11
12 ASYNCINET_CANCELLED, // wParam and lParam are not used.
13 // when receiving this, AsyncInet will be free soon and should not used anymore
14
15 ASYNCINET_ERROR // wParam is not used. lParam specify the error code (if there is one).
16 // when receiving this, AsyncInet will be free soon and should not used anymore
17};
@ ASYNCINET_ERROR
Definition: asyncinet.h:15
@ ASYNCINET_COMPLETE
Definition: asyncinet.h:9
@ ASYNCINET_CANCELLED
Definition: asyncinet.h:12
@ ASYNCINET_DATA
Definition: asyncinet.h:7

Function Documentation

◆ AsyncInetCancel()

BOOL AsyncInetCancel ( pASYNCINET  AsyncInet)

Definition at line 126 of file asyncinet.cpp.

127{
128 if (AsyncInet)
129 {
130 HINTERNET hInetFile;
132 AsyncInet->bCancelled = TRUE;
133 hInetFile = AsyncInet->hInetFile;
134 AsyncInet->hInetFile = NULL;
136
137 if (hInetFile)
138 {
139 InternetCloseHandle(hInetFile);
140 return TRUE;
141 }
142 }
143
144 return FALSE;
145}
#define NULL
Definition: types.h:112
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
BOOL WINAPI InternetCloseHandle(HINTERNET hInternet)
Definition: internet.c:1414
CRITICAL_SECTION CriticalSection
Definition: asyncinet.h:38
BOOL bCancelled
Definition: asyncinet.h:43
HINTERNET hInetFile
Definition: asyncinet.h:33
void WINAPI LeaveCriticalSection(LPCRITICAL_SECTION)
void WINAPI EnterCriticalSection(LPCRITICAL_SECTION)

Referenced by CAppScrnshotPreview::PreviousDisplayCleanup().

◆ AsyncInetDownload()

pASYNCINET AsyncInetDownload ( LPCWSTR  lpszAgent,
DWORD  dwAccessType,
LPCWSTR  lpszProxy,
LPCWSTR  lpszProxyBypass,
LPCWSTR  lpszUrl,
BOOL  bAllowCache,
ASYNCINET_CALLBACK  Callback,
VOID Extension 
)

Definition at line 33 of file asyncinet.cpp.

42{
43 pASYNCINET AsyncInet = NULL;
45 DWORD InetOpenUrlFlag = 0;
46 INTERNET_STATUS_CALLBACK OldCallbackFunc;
47
49 if (!AsyncInet)
50 {
51 OutputDebugStringA("At File: " __FILE__ " HeapAlloc returned 0\n");
52 return 0;
53 }
54
55 AsyncInet->bCancelled = FALSE;
56
57 AsyncInet->hInternet = NULL;
58 AsyncInet->hInetFile = NULL;
59
60 AsyncInet->Callback = Callback;
61 AsyncInet->Extension = Extension;
62
64
66 AsyncInet->ReferenceCnt = 1; // 1 for callee itself
68
69 if (AsyncInet->hEventHandleCreated && AsyncInet->hEventHandleClose)
70 {
71 AsyncInet->hInternet = InternetOpenW(lpszAgent, dwAccessType, lpszProxy, lpszProxyBypass, INTERNET_FLAG_ASYNC);
72
73 if (AsyncInet->hInternet)
74 {
76 if (OldCallbackFunc != INTERNET_INVALID_STATUS_CALLBACK)
77 {
79 if (!bAllowCache)
80 {
82 }
83
84 AsyncInet->hInetFile = InternetOpenUrlW(AsyncInet->hInternet, lpszUrl, 0, 0, InetOpenUrlFlag, (DWORD_PTR)AsyncInet);
85
86 if (AsyncInet->hInetFile)
87 {
88 // operate complete synchronously
89 bSuccess = TRUE;
90 AsyncInetReadFileLoop(AsyncInet);
91 }
92 else
93 {
95 {
96 // everything fine. waiting for handle created
98 {
99 case WAIT_OBJECT_0:
100 if (AsyncInet->hInetFile)
101 {
102 bSuccess = TRUE;
103 }
104 }
105 }
106 }
107 }
108 }
109 }
110
111 if (!bSuccess)
112 {
113 AsyncInetFree(AsyncInet);
114 AsyncInet = NULL;
115 }
116
117 if (AsyncInet)
118 {
119 // add reference count for caller.
120 // the caller is responsible for call AsyncInetRelease when no longer using it.
121 AsyncInetAcquire(AsyncInet);
122 }
123 return AsyncInet;
124}
VOID AsyncInetFree(pASYNCINET AsyncInet)
Definition: asyncinet.cpp:425
BOOL AsyncInetAcquire(pASYNCINET AsyncInet)
Definition: asyncinet.cpp:162
VOID AsyncInetReadFileLoop(pASYNCINET AsyncInet)
Definition: asyncinet.cpp:314
VOID CALLBACK AsyncInetStatusCallback(HINTERNET hInternet, DWORD_PTR dwContext, DWORD dwInternetStatus, LPVOID lpvStatusInformation, DWORD dwStatusInformationLength)
Definition: asyncinet.cpp:220
struct __AsyncInet * pASYNCINET
Definition: asyncinet.h:19
struct __AsyncInet ASYNCINET
Definition: asyncinet.h:19
#define ERROR_IO_PENDING
Definition: dderror.h:15
#define GetProcessHeap()
Definition: compat.h:736
#define HeapAlloc
Definition: compat.h:733
#define HEAP_ZERO_MEMORY
Definition: compat.h:134
HINTERNET WINAPI InternetOpenUrlW(HINTERNET hInternet, LPCWSTR lpszUrl, LPCWSTR lpszHeaders, DWORD dwHeadersLength, DWORD dwFlags, DWORD_PTR dwContext)
Definition: internet.c:3722
INTERNET_STATUS_CALLBACK WINAPI InternetSetStatusCallbackW(HINTERNET hInternet, INTERNET_STATUS_CALLBACK lpfnIntCB)
Definition: internet.c:2075
HINTERNET WINAPI InternetOpenW(LPCWSTR lpszAgent, DWORD dwAccessType, LPCWSTR lpszProxy, LPCWSTR lpszProxyBypass, DWORD dwFlags)
Definition: internet.c:979
static BOOLEAN bSuccess
Definition: drive.cpp:433
#define INFINITE
Definition: serial.h:102
unsigned int BOOL
Definition: ntddk_ex.h:94
unsigned long DWORD
Definition: ntddk_ex.h:95
_Inout_opt_ PUNICODE_STRING Extension
Definition: fltkernel.h:1092
void WINAPI SHIM_OBJ_NAME() OutputDebugStringA(LPCSTR lpOutputString)
Definition: ignoredbgout.c:18
UINT ReferenceCnt
Definition: asyncinet.h:37
ASYNCINET_CALLBACK Callback
Definition: asyncinet.h:48
VOID * Extension
Definition: asyncinet.h:49
HANDLE hEventHandleCreated
Definition: asyncinet.h:35
HANDLE hEventHandleClose
Definition: asyncinet.h:39
HINTERNET hInternet
Definition: asyncinet.h:32
DWORD WINAPI WaitForSingleObject(IN HANDLE hHandle, IN DWORD dwMilliseconds)
Definition: synch.c:82
VOID WINAPI InitializeCriticalSection(OUT LPCRITICAL_SECTION lpCriticalSection)
Definition: synch.c:751
uint32_t DWORD_PTR
Definition: typedefs.h:65
_In_ WDFINTERRUPT _In_ PFN_WDF_INTERRUPT_SYNCHRONIZE Callback
Definition: wdfinterrupt.h:458
DWORD WINAPI GetLastError(void)
Definition: except.c:1042
#define CreateEvent
Definition: winbase.h:3748
#define WAIT_OBJECT_0
Definition: winbase.h:406
#define INTERNET_FLAG_PRAGMA_NOCACHE
Definition: wininet.h:85
#define INTERNET_FLAG_DONT_CACHE
Definition: wininet.h:67
#define INTERNET_FLAG_RELOAD
Definition: wininet.h:61
#define INTERNET_FLAG_RESYNCHRONIZE
Definition: wininet.h:82
#define INTERNET_FLAG_ASYNC
Definition: wininet.h:64
VOID(CALLBACK * INTERNET_STATUS_CALLBACK)(_In_ HINTERNET, _In_opt_ DWORD_PTR, _In_ DWORD, _In_opt_ LPVOID, _In_ DWORD)
Definition: wininet.h:859
#define INTERNET_FLAG_PASSIVE
Definition: wininet.h:65
#define INTERNET_INVALID_STATUS_CALLBACK
Definition: wininet.h:915

Referenced by CAppScrnshotPreview::DisplayImage().

◆ AsyncInetRelease()

VOID AsyncInetRelease ( pASYNCINET  AsyncInet)

Definition at line 184 of file asyncinet.cpp.

185{
186 BOOL bCleanUp = FALSE;
187 if (AsyncInet)
188 {
190
191 ATLASSERT(AsyncInet->ReferenceCnt);
192 AsyncInet->ReferenceCnt--;
193 if (AsyncInet->ReferenceCnt == 0)
194 {
195 bCleanUp = TRUE;
196 }
197
199
200 if (bCleanUp)
201 {
202 AsyncInetCleanUp(AsyncInet);
203 }
204 }
205}
#define ATLASSERT(x)
Definition: CComVariant.cpp:10
BOOL AsyncInetCleanUp(pASYNCINET AsyncInet)
Definition: asyncinet.cpp:388

Referenced by AsyncInetReadFileLoop(), AsyncInetStatusCallback(), and CAppScrnshotPreview::ProcessWindowMessage().