wine-gecko does actually support synchronous XMLHttpRequests, even if they are deprecated, but unfortunately it is very broken compared to IE or all the other major browsers (more details [here](https://bugzilla.mozilla.org/show_bug.cgi?id=697151)). Thankfully, it still provides us with the event message loop, which is enough to fix it on mshtml side and act like IE.
For sync XHRs, send() is supposed to block all script code, except for notifications sent to the sync XHR. This is because when send() blocks, no other piece of code in the script should execute other than the sync XHR handlers. Unfortunately, that's not the case in Gecko's broken implementation, which can execute handlers as if they were APCs while it's "blocked" in send().
Note that it doesn't actually block, though, because we still process the message loop (non-event related tasks such as navigation, paints, and other stuff), and that's normal. Gecko doesn't block everything related to script events, only some things on the document and timers, but that's far from enough and not even enough for our purposes since we use our own timer tasks. And not even message events are blocked, even though we *also* use our own message event dispatchers (but it doesn't block Gecko ones either).
So what we have to do is we need to track all the timers and events dispatched that result in script handlers being executed, while "blocking" inside of a sync XHR send(), and queue them up to defer them to be dispatched later, after send() unblocks. But this is easier said that done. There are many corner cases to consider here, for example:
* Events dispatched *synchronously* from within a sync XHR handler or other piece of code called from it. * Nested sync XHR send() calls (called during handler of another sync XHR). * Async XHRs having their events dispatched during a blocking sync XHR send() are complicated. `readyStateChange` for example needs to have the async XHR's readyState at the time it was sent, **not** at the time it was actually dispatched, since we're going to delay it and dispatch it later. It's similar with other XHR states, such as responseText (which can be partial). * Aborts of async XHRs during such handlers.
These patches hopefully should address all the issues and, on a high level, work like this:
* Track the `readyState` and `responseText` length manually, so we can override / force them to specific values. * "Snapshot" the async XHR at the time we encounter an event for it, and queue this event with such information. When later dispatching this event (after being deferred), we temporarily set the state of the async XHR to the snapshot. * To deal with nested event dispatches, keep track of a "dispatch depth" (everytime we dispatch an event we increase the depth, and when it returns we decrease it). * For sync XHRs, we note the depth when send() is called, and defer events at that depth, since they're dispatched during the "blocked" message loop and need to be delayed (except for sync XHR events, which is a special case since it must be dispatched synchronously). When it returns, we restore the previous blocking depth.
From: Gabriel Ivăncescu gabrielopcode@gmail.com
Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com --- dlls/mshtml/xmlhttprequest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/dlls/mshtml/xmlhttprequest.c b/dlls/mshtml/xmlhttprequest.c index b4269bbe8d1..04ee66af6d9 100644 --- a/dlls/mshtml/xmlhttprequest.c +++ b/dlls/mshtml/xmlhttprequest.c @@ -594,8 +594,8 @@ static HRESULT WINAPI HTMLXMLHttpRequest_open(IHTMLXMLHttpRequest *iface, BSTR b return hres; }
- nsres = nsIXMLHttpRequest_Open(This->nsxhr, &method, &url, TRUE, - &user, &password, 0); + nsres = nsIXMLHttpRequest_Open(This->nsxhr, &method, &url, !!V_BOOL(&varAsync), + &user, &password, 1 + (V_VT(&varPassword) != VT_EMPTY ? 2 : V_VT(&varUser) != VT_EMPTY));
nsACString_Finish(&method); nsACString_Finish(&url);
From: Gabriel Ivăncescu gabrielopcode@gmail.com
So it can be forced to specific values during synchronous XHRs.
Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com --- dlls/mshtml/xmlhttprequest.c | 75 +++++++++++++++++------------------- 1 file changed, 35 insertions(+), 40 deletions(-)
diff --git a/dlls/mshtml/xmlhttprequest.c b/dlls/mshtml/xmlhttprequest.c index 04ee66af6d9..0efe4c3ac85 100644 --- a/dlls/mshtml/xmlhttprequest.c +++ b/dlls/mshtml/xmlhttprequest.c @@ -138,6 +138,7 @@ struct HTMLXMLHttpRequest { IWineXMLHttpRequestPrivate IWineXMLHttpRequestPrivate_iface; IProvideClassInfo2 IProvideClassInfo2_iface; LONG ref; + LONG readyState; response_type_t response_type; nsIXMLHttpRequest *nsxhr; XMLHttpReqEventListener *event_listener; @@ -224,6 +225,7 @@ static nsrefcnt NSAPI XMLHttpReqEventListener_Release(nsIDOMEventListener *iface static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *iface, nsIDOMEvent *nsevent) { XMLHttpReqEventListener *This = impl_from_nsIDOMEventListener(iface); + UINT16 readyState; DOMEvent *event; HRESULT hres;
@@ -232,6 +234,9 @@ static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *i if(!This->xhr) return NS_OK;
+ if(NS_SUCCEEDED(nsIXMLHttpRequest_GetReadyState(This->xhr->nsxhr, &readyState))) + This->xhr->readyState = readyState; + hres = create_event_from_nsevent(nsevent, dispex_compat_mode(&This->xhr->event_target.dispex), &event); if(SUCCEEDED(hres) ){ dispatch_event(&This->xhr->event_target, event); @@ -344,19 +349,12 @@ static HRESULT WINAPI HTMLXMLHttpRequest_Invoke(IHTMLXMLHttpRequest *iface, DISP static HRESULT WINAPI HTMLXMLHttpRequest_get_readyState(IHTMLXMLHttpRequest *iface, LONG *p) { HTMLXMLHttpRequest *This = impl_from_IHTMLXMLHttpRequest(iface); - UINT16 val; - nsresult nsres;
TRACE("(%p)->(%p)\n", This, p);
if(!p) return E_POINTER; - nsres = nsIXMLHttpRequest_GetReadyState(This->nsxhr, &val); - if(NS_FAILED(nsres)) { - ERR("nsIXMLHttpRequest_GetReadyState failed: %08lx\n", nsres); - return E_FAIL; - } - *p = val; + *p = This->readyState; return S_OK; }
@@ -378,6 +376,11 @@ static HRESULT WINAPI HTMLXMLHttpRequest_get_responseText(IHTMLXMLHttpRequest *i if(!p) return E_POINTER;
+ if(This->readyState < 3) { + *p = NULL; + return S_OK; + } + nsAString_Init(&nsstr, NULL); nsres = nsIXMLHttpRequest_GetResponseText(This->nsxhr, &nsstr); return return_nsstr(nsres, &nsstr, p); @@ -394,6 +397,11 @@ static HRESULT WINAPI HTMLXMLHttpRequest_get_responseXML(IHTMLXMLHttpRequest *if
TRACE("(%p)->(%p)\n", This, p);
+ if(This->readyState < 4) { + *p = NULL; + return S_OK; + } + if(dispex_compat_mode(&This->event_target.dispex) >= COMPAT_MODE_IE10) { nsIDOMDocument *nsdoc; nsresult nsres; @@ -448,6 +456,11 @@ static HRESULT WINAPI HTMLXMLHttpRequest_get_status(IHTMLXMLHttpRequest *iface, if(!p) return E_POINTER;
+ if(This->readyState < 2) { + *p = 0; + return E_FAIL; + } + nsres = nsIXMLHttpRequest_GetStatus(This->nsxhr, &val); if(NS_FAILED(nsres)) { ERR("nsIXMLHttpRequest_GetStatus failed: %08lx\n", nsres); @@ -465,19 +478,13 @@ static HRESULT WINAPI HTMLXMLHttpRequest_get_statusText(IHTMLXMLHttpRequest *ifa HTMLXMLHttpRequest *This = impl_from_IHTMLXMLHttpRequest(iface); nsACString nscstr; nsresult nsres; - HRESULT hres; - LONG state;
TRACE("(%p)->(%p)\n", This, p);
if(!p) return E_POINTER;
- hres = IHTMLXMLHttpRequest_get_readyState(iface, &state); - if(FAILED(hres)) - return hres; - - if(state < 2) { + if(This->readyState < 2) { *p = NULL; return E_FAIL; } @@ -518,6 +525,8 @@ static HRESULT WINAPI HTMLXMLHttpRequest_abort(IHTMLXMLHttpRequest *iface) return E_FAIL; }
+ /* This state change is not broadcast by Gecko, so set it manually */ + This->readyState = 0; return S_OK; }
@@ -657,19 +666,13 @@ static HRESULT WINAPI HTMLXMLHttpRequest_getAllResponseHeaders(IHTMLXMLHttpReque HTMLXMLHttpRequest *This = impl_from_IHTMLXMLHttpRequest(iface); nsACString nscstr; nsresult nsres; - HRESULT hres; - LONG state;
TRACE("(%p)->(%p)\n", This, p);
if(!p) return E_POINTER;
- hres = IHTMLXMLHttpRequest_get_readyState(iface, &state); - if(FAILED(hres)) - return hres; - - if(state < 2) { + if(This->readyState < 2) { *p = NULL; return E_FAIL; } @@ -685,8 +688,6 @@ static HRESULT WINAPI HTMLXMLHttpRequest_getResponseHeader(IHTMLXMLHttpRequest * nsACString header, ret; char *cstr; nsresult nsres; - HRESULT hres; - LONG state; TRACE("(%p)->(%s %p)\n", This, debugstr_w(bstrHeader), p);
if(!p) @@ -694,11 +695,7 @@ static HRESULT WINAPI HTMLXMLHttpRequest_getResponseHeader(IHTMLXMLHttpRequest * if(!bstrHeader) return E_INVALIDARG;
- hres = IHTMLXMLHttpRequest_get_readyState(iface, &state); - if(FAILED(hres)) - return hres; - - if(state < 2) { + if(This->readyState < 2) { *p = NULL; return E_FAIL; } @@ -939,8 +936,6 @@ static HRESULT WINAPI HTMLXMLHttpRequest_private_get_response(IWineXMLHttpReques { HTMLXMLHttpRequest *This = impl_from_IWineXMLHttpRequestPrivate(iface); HRESULT hres = S_OK; - nsresult nsres; - UINT16 state;
TRACE("(%p)->(%p)\n", This, p);
@@ -958,8 +953,7 @@ static HRESULT WINAPI HTMLXMLHttpRequest_private_get_response(IWineXMLHttpReques
case response_type_arraybuf: case response_type_blob: - nsres = nsIXMLHttpRequest_GetReadyState(This->nsxhr, &state); - if(NS_FAILED(nsres) || state < 4) { + if(This->readyState < 4) { V_VT(p) = VT_EMPTY; break; } @@ -986,17 +980,11 @@ static HRESULT WINAPI HTMLXMLHttpRequest_private_put_responseType(IWineXMLHttpRe HTMLXMLHttpRequest *This = impl_from_IWineXMLHttpRequestPrivate(iface); nsAString nsstr; nsresult nsres; - HRESULT hres; unsigned i; - LONG state;
TRACE("(%p)->(%s)\n", This, debugstr_w(v));
- hres = IHTMLXMLHttpRequest_get_readyState(&This->IHTMLXMLHttpRequest_iface, &state); - if(FAILED(hres)) - return hres; - - if(state < 1 || state > 2) { + if(This->readyState < 1 || This->readyState > 2) { /* FIXME: Return InvalidStateError */ return E_FAIL; } @@ -1309,6 +1297,9 @@ static void HTMLXMLHttpRequest_bind_event(DispatchEx *dispex, eventid_t eid) This->event_listener->events_mask = 0; }
+ if(This->event_listener->events_mask & (1 << i)) + return; + nsres = nsIXMLHttpRequest_QueryInterface(This->nsxhr, &IID_nsIDOMEventTarget, (void**)&nstarget); assert(nsres == NS_OK);
@@ -1489,6 +1480,10 @@ static HRESULT WINAPI HTMLXMLHttpRequestFactory_create(IHTMLXMLHttpRequestFactor &HTMLXMLHttpRequest_dispex, This->window->doc->document_mode); ret->ref = 1;
+ /* Always register these handlers because we need them to track state */ + HTMLXMLHttpRequest_bind_event(&ret->event_target.dispex, EVENTID_READYSTATECHANGE); + HTMLXMLHttpRequest_bind_event(&ret->event_target.dispex, EVENTID_PROGRESS); + *p = &ret->IHTMLXMLHttpRequest_iface; return S_OK; }
From: Gabriel Ivăncescu gabrielopcode@gmail.com
Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com --- dlls/mshtml/xmlhttprequest.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-)
diff --git a/dlls/mshtml/xmlhttprequest.c b/dlls/mshtml/xmlhttprequest.c index 0efe4c3ac85..f4082bc8e3d 100644 --- a/dlls/mshtml/xmlhttprequest.c +++ b/dlls/mshtml/xmlhttprequest.c @@ -139,6 +139,7 @@ struct HTMLXMLHttpRequest { IProvideClassInfo2 IProvideClassInfo2_iface; LONG ref; LONG readyState; + size_t responseText_length; response_type_t response_type; nsIXMLHttpRequest *nsxhr; XMLHttpReqEventListener *event_listener; @@ -225,7 +226,9 @@ static nsrefcnt NSAPI XMLHttpReqEventListener_Release(nsIDOMEventListener *iface static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *iface, nsIDOMEvent *nsevent) { XMLHttpReqEventListener *This = impl_from_nsIDOMEventListener(iface); + const PRUnichar *text; UINT16 readyState; + nsAString nsstr; DOMEvent *event; HRESULT hres;
@@ -234,9 +237,21 @@ static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *i if(!This->xhr) return NS_OK;
- if(NS_SUCCEEDED(nsIXMLHttpRequest_GetReadyState(This->xhr->nsxhr, &readyState))) + if(NS_SUCCEEDED(nsIXMLHttpRequest_GetReadyState(This->xhr->nsxhr, &readyState))) { This->xhr->readyState = readyState;
+ if(This->xhr->readyState >= 3) { + nsAString_Init(&nsstr, NULL); + if(NS_SUCCEEDED(nsIXMLHttpRequest_GetResponseText(This->xhr->nsxhr, &nsstr))) { + /* Avoid recalculating from the beginning, since it can't be shorter */ + nsAString_GetData(&nsstr, &text); + if(text && text[0]) + This->xhr->responseText_length += wcslen(text + This->xhr->responseText_length); + nsAString_Finish(&nsstr); + } + } + } + hres = create_event_from_nsevent(nsevent, dispex_compat_mode(&This->xhr->event_target.dispex), &event); if(SUCCEEDED(hres) ){ dispatch_event(&This->xhr->event_target, event); @@ -368,6 +383,8 @@ static HRESULT WINAPI HTMLXMLHttpRequest_get_responseBody(IHTMLXMLHttpRequest *i static HRESULT WINAPI HTMLXMLHttpRequest_get_responseText(IHTMLXMLHttpRequest *iface, BSTR *p) { HTMLXMLHttpRequest *This = impl_from_IHTMLXMLHttpRequest(iface); + const PRUnichar *text; + HRESULT hres = S_OK; nsAString nsstr; nsresult nsres;
@@ -383,7 +400,17 @@ static HRESULT WINAPI HTMLXMLHttpRequest_get_responseText(IHTMLXMLHttpRequest *i
nsAString_Init(&nsstr, NULL); nsres = nsIXMLHttpRequest_GetResponseText(This->nsxhr, &nsstr); - return return_nsstr(nsres, &nsstr, p); + if(NS_FAILED(nsres)) + hres = map_nsresult(nsres); + else { + nsAString_GetData(&nsstr, &text); + if(!text || !text[0]) + *p = NULL; + else if(!(*p = SysAllocStringLen(text, This->responseText_length))) + hres = E_OUTOFMEMORY; + nsAString_Finish(&nsstr); + } + return hres; }
static HRESULT WINAPI HTMLXMLHttpRequest_get_responseXML(IHTMLXMLHttpRequest *iface, IDispatch **p)
From: Gabriel Ivăncescu gabrielopcode@gmail.com
Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com ---
The todo_wine that are added are not new failures, they were just never checked before (it bailed out early since open() failed). --- dlls/mshtml/htmlevent.c | 25 ++++++ dlls/mshtml/htmlevent.h | 6 ++ dlls/mshtml/mshtml_private.h | 8 ++ dlls/mshtml/task.c | 57 ++++++++++++- dlls/mshtml/tests/script.c | 24 +++++- dlls/mshtml/tests/xhr.js | 92 ++++++++++++++++++++ dlls/mshtml/tests/xmlhttprequest.c | 18 ++-- dlls/mshtml/xmlhttprequest.c | 129 +++++++++++++++++++++++++---- 8 files changed, 325 insertions(+), 34 deletions(-)
diff --git a/dlls/mshtml/htmlevent.c b/dlls/mshtml/htmlevent.c index bcde9f38bba..18c4bccdcdb 100644 --- a/dlls/mshtml/htmlevent.c +++ b/dlls/mshtml/htmlevent.c @@ -3603,6 +3603,7 @@ static HRESULT dispatch_event_object(EventTarget *event_target, DOMEvent *event, const event_target_vtbl_t *vtbl, *target_vtbl; HTMLEventObj *event_obj_ref = NULL; IHTMLEventObj *prev_event = NULL; + thread_data_t *thread_data; EventTarget *iter; HRESULT hres;
@@ -3618,6 +3619,29 @@ static HRESULT dispatch_event_object(EventTarget *event_target, DOMEvent *event, return E_FAIL; }
+ if(!(thread_data = get_thread_data(TRUE))) { + ERR("no memory to get thread data\n"); + return E_OUTOFMEMORY; + } + + if(thread_data->event_dispatch_depth == thread_data->blocking_event_dispatch_depth) { + struct queued_event *queued_event = malloc(sizeof(*queued_event)); + + if(!queued_event) { + ERR("no memory to queue event\n"); + return E_OUTOFMEMORY; + } + + queued_event->event = event; + queued_event->event_target = event_target; + IDOMEvent_AddRef(&event->IDOMEvent_iface); + IEventTarget_AddRef(&event_target->IEventTarget_iface); + + list_add_tail(&thread_data->queued_events_list, &queued_event->entry); + return S_OK; + } + thread_data->event_dispatch_depth++; + iter = event_target; IEventTarget_AddRef(&event_target->IEventTarget_iface);
@@ -3717,6 +3741,7 @@ static HRESULT dispatch_event_object(EventTarget *event_target, DOMEvent *event, if(target_chain != target_chain_buf) free(target_chain);
+ thread_data->event_dispatch_depth--; return S_OK; }
diff --git a/dlls/mshtml/htmlevent.h b/dlls/mshtml/htmlevent.h index 54cc5b5932a..c903e965906 100644 --- a/dlls/mshtml/htmlevent.h +++ b/dlls/mshtml/htmlevent.h @@ -99,6 +99,12 @@ typedef struct DOMEvent { BOOL no_event_obj; } DOMEvent;
+struct queued_event { + struct list entry; + EventTarget *event_target; + DOMEvent *event; +}; + const WCHAR *get_event_name(eventid_t) DECLSPEC_HIDDEN; void check_event_attr(HTMLDocumentNode*,nsIDOMElement*) DECLSPEC_HIDDEN; void release_event_target(EventTarget*) DECLSPEC_HIDDEN; diff --git a/dlls/mshtml/mshtml_private.h b/dlls/mshtml/mshtml_private.h index bec982a75fc..59afd6d99ca 100644 --- a/dlls/mshtml/mshtml_private.h +++ b/dlls/mshtml/mshtml_private.h @@ -1293,12 +1293,20 @@ typedef struct { struct list task_list; struct list timer_list; struct wine_rb_tree session_storage_map; + + /* See sync_xhr_send() */ + unsigned int event_dispatch_depth; + unsigned int blocking_event_dispatch_depth; + struct list queued_events_list; + struct list queued_xhr_events_list; } thread_data_t;
thread_data_t *get_thread_data(BOOL) DECLSPEC_HIDDEN; HWND get_thread_hwnd(void) DECLSPEC_HIDDEN; int session_storage_map_cmp(const void*,const struct wine_rb_entry*) DECLSPEC_HIDDEN; void destroy_session_storage(thread_data_t*) DECLSPEC_HIDDEN; +void process_queued_events(void) DECLSPEC_HIDDEN; +nsresult sync_xhr_send(nsIXMLHttpRequest*,nsIVariant*) DECLSPEC_HIDDEN;
LONG get_task_target_magic(void) DECLSPEC_HIDDEN; HRESULT push_task(task_t*,task_proc_t,task_proc_t,LONG) DECLSPEC_HIDDEN; diff --git a/dlls/mshtml/task.c b/dlls/mshtml/task.c index 2987b4bf19d..e4ca02a34b4 100644 --- a/dlls/mshtml/task.c +++ b/dlls/mshtml/task.c @@ -289,7 +289,7 @@ static LRESULT process_timer(void) thread_data = get_thread_data(FALSE); assert(thread_data != NULL);
- if(list_empty(&thread_data->timer_list)) { + if(list_empty(&thread_data->timer_list) || thread_data->blocking_event_dispatch_depth != ~0) { KillTimer(thread_data->thread_hwnd, TIMER_ID); return 0; } @@ -324,7 +324,7 @@ static LRESULT process_timer(void) call_timer_disp(disp, timer_type);
IDispatch_Release(disp); - }while(!list_empty(&thread_data->timer_list)); + }while(!list_empty(&thread_data->timer_list) && thread_data->blocking_event_dispatch_depth == ~0);
KillTimer(thread_data->thread_hwnd, TIMER_ID); return 0; @@ -334,6 +334,8 @@ static LRESULT WINAPI hidden_proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPa { switch(msg) { case WM_PROCESSTASK: + process_queued_events(); + while(1) { task_t *task = pop_task(); if(!task) @@ -417,6 +419,9 @@ thread_data_t *get_thread_data(BOOL create) list_init(&thread_data->task_list); list_init(&thread_data->timer_list); wine_rb_init(&thread_data->session_storage_map, session_storage_map_cmp); + thread_data->blocking_event_dispatch_depth = ~0; + list_init(&thread_data->queued_events_list); + list_init(&thread_data->queued_xhr_events_list); }
return thread_data; @@ -432,3 +437,51 @@ ULONGLONG get_time_stamp(void) GetSystemTimeAsFileTime(&time); return (((ULONGLONG)time.dwHighDateTime << 32) + time.dwLowDateTime) / 10000 - time_epoch; } + +nsresult sync_xhr_send(nsIXMLHttpRequest *nsxhr, nsIVariant *nsbody) +{ + thread_data_t *thread_data = get_thread_data(TRUE); + unsigned int prev_blocking_depth; + nsresult nsres; + + if(!thread_data) + return NS_ERROR_OUT_OF_MEMORY; + + /* Note: Starting with Gecko 30.0 (Firefox 30.0 / Thunderbird 30.0 / SeaMonkey 2.27), + * synchronous requests on the main thread have been deprecated due to the negative + * effects to the user experience. However, they still work. The larger issue is that + * it is broken because it still dispatches async XHR and some other events, while all + * other major browsers don't, including IE, so we have to filter them out during Send. + * + * They will need to be queued and dispatched later, after Send returns, otherwise it + * breaks JavaScript single-threaded expectations (js code will switch from blocking in + * Send to executing some event handler, then returning back to Send, messing its state). + * + * Of course we can't just delay dispatching the events, because the state won't match + * for each event later on to what it's supposed to be (most notably, XHR's readyState). + * So unfortunately we have to hardcode and snapshot the XHR state for async events... + * + * For details (and bunch of problems to consider) see: https://bugzil.la/697151 + */ + prev_blocking_depth = thread_data->blocking_event_dispatch_depth; + thread_data->blocking_event_dispatch_depth = thread_data->event_dispatch_depth; + + nsres = nsIXMLHttpRequest_Send(nsxhr, nsbody); + + thread_data->blocking_event_dispatch_depth = prev_blocking_depth; + + if(prev_blocking_depth != ~0) + return nsres; + + /* Make sure blocked events and timers are processed */ + if(!list_empty(&thread_data->queued_events_list)) + PostMessageW(thread_data->thread_hwnd, WM_PROCESSTASK, 0, 0); + + if(!list_empty(&thread_data->timer_list)) { + task_timer_t *timer = LIST_ENTRY(list_head(&thread_data->timer_list), task_timer_t, entry); + DWORD tc = GetTickCount(); + + SetTimer(thread_data->thread_hwnd, TIMER_ID, timer->time > tc ? timer->time - tc : 0, NULL); + } + return nsres; +} diff --git a/dlls/mshtml/tests/script.c b/dlls/mshtml/tests/script.c index 2bcd588f51f..4f475885ad5 100644 --- a/dlls/mshtml/tests/script.c +++ b/dlls/mshtml/tests/script.c @@ -3675,6 +3675,7 @@ typedef struct { IInternetProtocolSink *sink; BINDINFO bind_info;
+ HANDLE delay_event; BSTR content_type; IStream *stream; char *data; @@ -3685,12 +3686,17 @@ typedef struct { IUri *uri; } ProtocolHandler;
+static ProtocolHandler *delay_with_signal_handler; + static DWORD WINAPI delay_proc(void *arg) { PROTOCOLDATA protocol_data = {PI_FORCE_ASYNC}; ProtocolHandler *protocol_handler = arg;
- Sleep(protocol_handler->delay); + if(protocol_handler->delay_event) + WaitForSingleObject(protocol_handler->delay_event, INFINITE); + else + Sleep(protocol_handler->delay); protocol_handler->delay = -1; IInternetProtocolSink_Switch(protocol_handler->sink, &protocol_data); return 0; @@ -3735,7 +3741,7 @@ static void report_data(ProtocolHandler *This)
IHttpNegotiate_Release(http_negotiate);
- if(This->delay) { + if(This->delay || This->delay_event) { IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface); QueueUserWorkItem(delay_proc, This, 0); return; @@ -4061,8 +4067,20 @@ static HRESULT WINAPI ProtocolEx_StartEx(IInternetProtocolEx *iface, IUri *uri,
hres = IUri_GetQuery(uri, &query); if(SUCCEEDED(hres)) { - if(!lstrcmpW(query, L"?delay")) + if(!wcscmp(query, L"?delay")) This->delay = 1000; + else if(!wcscmp(query, L"?delay_with_signal")) { + if(delay_with_signal_handler) { + ProtocolHandler *delayed = delay_with_signal_handler; + delay_with_signal_handler = NULL; + SetEvent(delayed->delay_event); + This->delay = 30; + }else { + delay_with_signal_handler = This; + This->delay_event = CreateEventW(NULL, FALSE, FALSE, NULL); + ok(This->delay_event != NULL, "CreateEvent failed: %08lx\n", GetLastError()); + } + } else if(!wcsncmp(query, L"?content-type=", sizeof("?content-type=")-1)) This->content_type = SysAllocString(query + sizeof("?content-type=")-1); SysFreeString(query); diff --git a/dlls/mshtml/tests/xhr.js b/dlls/mshtml/tests/xhr.js index 2b07ee2f188..c6d8b400af0 100644 --- a/dlls/mshtml/tests/xhr.js +++ b/dlls/mshtml/tests/xhr.js @@ -76,6 +76,97 @@ function test_xhr() { xhr.send(xml); }
+function test_sync_xhr() { + var async_xhr, async_xhr2, sync_xhr, sync_xhr_in_async, sync_xhr_nested, a = [ 0 ]; + + document.ondblclick = function() { a.push("dblclick"); }; + window.addEventListener("message", function(e) { a.push("msg" + e.data); }); + window.postMessage("1", "*"); + window.setTimeout(function() { a.push("timeout"); }, 0); + window.postMessage("2", "*"); + a.push(1); + + async_xhr = new XMLHttpRequest(); + async_xhr.open("POST", "echo.php", true); + async_xhr.onreadystatechange = function() { + if(async_xhr.readyState < 3) + return; + a.push("async_xhr(" + async_xhr.readyState + ")"); + ok(async_xhr2.readyState === 1, "async_xhr2.readyState = " + async_xhr2.readyState); + if(async_xhr.readyState == 4) { + window.setTimeout(function() { a.push("timeout_async"); }, 0); + window.postMessage("_async", "*"); + + sync_xhr_in_async = new XMLHttpRequest(); + sync_xhr_in_async.open("POST", "echo.php", false); + sync_xhr_in_async.onreadystatechange = function() { if(sync_xhr_in_async.readyState == 4) a.push("sync_xhr_in_async"); }; + sync_xhr_in_async.setRequestHeader("X-Test", "True"); + sync_xhr_in_async.send("sync_in_async"); + } + }; + async_xhr.addEventListener("click", function() { a.push("click"); }); + async_xhr.setRequestHeader("X-Test", "True"); + async_xhr.send("1234"); + a.push(2); + + async_xhr2 = new XMLHttpRequest(); + async_xhr2.open("POST", "echo.php?delay_with_signal", true); + async_xhr2.onreadystatechange = function() { + if(async_xhr2.readyState < 3) + return; + a.push("async_xhr2(" + async_xhr2.readyState + ")"); + ok(async_xhr.readyState === 4, "async_xhr.readyState = " + async_xhr.readyState); + }; + async_xhr2.setRequestHeader("X-Test", "True"); + async_xhr2.send("foobar"); + a.push(3); + + sync_xhr = new XMLHttpRequest(); + sync_xhr.open("POST", "echo.php?delay_with_signal", false); + sync_xhr.onreadystatechange = function() { + a.push("sync_xhr(" + sync_xhr.readyState + ")"); + ok(async_xhr.readyState === 1, "async_xhr.readyState in sync_xhr handler = " + async_xhr.readyState); + ok(async_xhr2.readyState === 1, "async_xhr2.readyState in sync_xhr handler = " + async_xhr2.readyState); + if(sync_xhr.readyState < 4) + return; + window.setTimeout(function() { a.push("timeout_sync"); }, 0); + window.postMessage("_sync", "*"); + + sync_xhr_nested = new XMLHttpRequest(); + sync_xhr_nested.open("POST", "echo.php", false); + sync_xhr_nested.onreadystatechange = function() { + a.push("nested(" + sync_xhr_nested.readyState + ")"); + if(sync_xhr_nested.readyState == 4) { + window.setTimeout(function() { a.push("timeout_nested"); }, 0); + window.postMessage("_nested", "*"); + + var e = document.createEvent("Event"); + e.initEvent("click", true, false); + async_xhr.dispatchEvent(e); + document.fireEvent("ondblclick", document.createEventObject()); + } + }; + sync_xhr_nested.setRequestHeader("X-Test", "True"); + sync_xhr_nested.send("nested"); + }; + sync_xhr.setRequestHeader("X-Test", "True"); + sync_xhr.send("abcd"); + a.push(4); + + window.setTimeout(function() { + var r = a.join(","); + todo_wine_if(document.documentMode < 10 || document.documentMode >= 11). + ok(r === "0,1,2,3," + (document.documentMode < 10 ? "sync_xhr(1),sync_xhr(2),sync_xhr(3)," : "") + + "sync_xhr(4)," + (document.documentMode < 10 ? "nested(1),nested(2),nested(3)," : "") + + "nested(4),click," + (document.documentMode < 11 ? "dblclick," : "") + + "4,async_xhr(3),async_xhr(4),sync_xhr_in_async,async_xhr2(3),async_xhr2(4)," + + "msg1,msg2,msg_sync,msg_nested,msg_async,timeout,timeout_sync,timeout_nested", + "unexpected order: " + r); + document.ondblclick = null; + next_test(); + }); +} + function test_content_types() { var xhr = new XMLHttpRequest(), types, i = 0, override = false; var v = document.documentMode; @@ -291,6 +382,7 @@ function test_response() {
var tests = [ test_xhr, + test_sync_xhr, test_content_types, test_abort, test_timeout, diff --git a/dlls/mshtml/tests/xmlhttprequest.c b/dlls/mshtml/tests/xmlhttprequest.c index a3ec54ffef6..2415ac8eb0f 100644 --- a/dlls/mshtml/tests/xmlhttprequest.c +++ b/dlls/mshtml/tests/xmlhttprequest.c @@ -673,18 +673,12 @@ static void test_sync_xhr(IHTMLDocument2 *doc, const WCHAR *xml_url, const WCHAR
SET_EXPECT(xmlhttprequest_onreadystatechange_opened); hres = IHTMLXMLHttpRequest_open(xhr, method, url, vbool, vempty, vempty); - todo_wine ok(hres == S_OK, "open failed: %08lx\n", hres); /* Gecko 30+ only supports async */ - todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_opened); + ok(hres == S_OK, "open failed: %08lx\n", hres); + CHECK_CALLED(xmlhttprequest_onreadystatechange_opened);
SysFreeString(method); SysFreeString(url);
- if(FAILED(hres)) { - IHTMLXMLHttpRequest_Release(xhr); - xhr = NULL; - return; - } - text = (BSTR)0xdeadbeef; hres = IHTMLXMLHttpRequest_getAllResponseHeaders(xhr, &text); ok(hres == E_FAIL, "got %08lx\n", hres); @@ -718,11 +712,11 @@ static void test_sync_xhr(IHTMLDocument2 *doc, const WCHAR *xml_url, const WCHAR loading_cnt = 0; hres = IHTMLXMLHttpRequest_send(xhr, vempty); ok(hres == S_OK, "send failed: %08lx\n", hres); - CHECK_CALLED(xmlhttprequest_onreadystatechange_opened); - CHECK_CALLED(xmlhttprequest_onreadystatechange_headers_received); - CHECK_CALLED(xmlhttprequest_onreadystatechange_loading); + todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_opened); + todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_headers_received); + todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_loading); CHECK_CALLED(xmlhttprequest_onreadystatechange_done); - ok(loading_cnt == 1, "loading_cnt = %d\n", loading_cnt); + todo_wine ok(loading_cnt == 1, "loading_cnt = %d\n", loading_cnt);
text = NULL; hres = IHTMLXMLHttpRequest_getResponseHeader(xhr, content_type, &text); diff --git a/dlls/mshtml/xmlhttprequest.c b/dlls/mshtml/xmlhttprequest.c index f4082bc8e3d..b932e9df0a7 100644 --- a/dlls/mshtml/xmlhttprequest.c +++ b/dlls/mshtml/xmlhttprequest.c @@ -141,10 +141,56 @@ struct HTMLXMLHttpRequest { LONG readyState; size_t responseText_length; response_type_t response_type; + BOOL synchronous; nsIXMLHttpRequest *nsxhr; XMLHttpReqEventListener *event_listener; };
+struct queued_xhr_event { + struct queued_event header; + size_t responseText_length; + LONG readyState; +}; + +void process_queued_events(void) +{ + thread_data_t *thread_data = get_thread_data(FALSE); + struct queued_event *queued_event; + struct list *head; + + /* Another sync XHR send() can be called during a handler, so re-check the head after + every dispatch, while making sure async XHR events are always dispatched first */ + while(thread_data->blocking_event_dispatch_depth == ~0) { + BOOL skip_dispatch = FALSE; + + if(!(head = list_head(&thread_data->queued_xhr_events_list))) { + if(!(head = list_head(&thread_data->queued_events_list))) + break; + } else { + struct queued_xhr_event *xhr_event = LIST_ENTRY(head, struct queued_xhr_event, header.entry); + HTMLXMLHttpRequest *xhr = CONTAINING_RECORD(xhr_event->header.event_target, HTMLXMLHttpRequest, event_target); + + /* Skip aborted XHRs */ + if(xhr->readyState == 0 && xhr_event->readyState != 1) + skip_dispatch = TRUE; + else { + xhr->readyState = xhr_event->readyState; + xhr->responseText_length = xhr_event->responseText_length; + } + } + + queued_event = LIST_ENTRY(head, struct queued_event, entry); + list_remove(head); + + if(!skip_dispatch) + dispatch_event(queued_event->event_target, queued_event->event); + + IEventTarget_Release(&queued_event->event_target->IEventTarget_iface); + IDOMEvent_Release(&queued_event->event->IDOMEvent_iface); + free(queued_event); + } +} + static void detach_xhr_event_listener(XMLHttpReqEventListener *event_listener) { nsIDOMEventTarget *event_target; @@ -226,27 +272,33 @@ static nsrefcnt NSAPI XMLHttpReqEventListener_Release(nsIDOMEventListener *iface static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *iface, nsIDOMEvent *nsevent) { XMLHttpReqEventListener *This = impl_from_nsIDOMEventListener(iface); + thread_data_t *thread_data; + size_t responseText_length; const PRUnichar *text; - UINT16 readyState; nsAString nsstr; DOMEvent *event; + LONG readyState; HRESULT hres; + UINT16 val;
TRACE("(%p)\n", This);
if(!This->xhr) return NS_OK;
- if(NS_SUCCEEDED(nsIXMLHttpRequest_GetReadyState(This->xhr->nsxhr, &readyState))) { - This->xhr->readyState = readyState; + readyState = This->xhr->readyState; + responseText_length = This->xhr->responseText_length;
- if(This->xhr->readyState >= 3) { + if(NS_SUCCEEDED(nsIXMLHttpRequest_GetReadyState(This->xhr->nsxhr, &val))) { + readyState = val; + + if(readyState >= 3) { nsAString_Init(&nsstr, NULL); if(NS_SUCCEEDED(nsIXMLHttpRequest_GetResponseText(This->xhr->nsxhr, &nsstr))) { /* Avoid recalculating from the beginning, since it can't be shorter */ nsAString_GetData(&nsstr, &text); if(text && text[0]) - This->xhr->responseText_length += wcslen(text + This->xhr->responseText_length); + responseText_length += wcslen(text + responseText_length); nsAString_Finish(&nsstr); } } @@ -254,9 +306,52 @@ static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *i
hres = create_event_from_nsevent(nsevent, dispex_compat_mode(&This->xhr->event_target.dispex), &event); if(SUCCEEDED(hres) ){ + if(!(thread_data = get_thread_data(FALSE)) || thread_data->blocking_event_dispatch_depth == ~0) + thread_data = NULL; + else { + if(!This->xhr->synchronous) { + struct queued_xhr_event *queued_event = malloc(sizeof(*queued_event)); + + if(!queued_event) + return NS_ERROR_OUT_OF_MEMORY; + + queued_event->header.event = event; + queued_event->header.event_target = &This->xhr->event_target; + IHTMLXMLHttpRequest_AddRef(&This->xhr->IHTMLXMLHttpRequest_iface); + + /* Save snapshot of XHR state (see sync_xhr_send() comments) */ + queued_event->readyState = readyState; + queued_event->responseText_length = responseText_length; + + list_add_tail(&thread_data->queued_xhr_events_list, &queued_event->header.entry); + return NS_OK; + } + + /* Workaround weird Gecko behavior with nested sync XHRs, where it sends readyState changes + for OPENED (or possibly other states than DONE), unlike IE10+ and non-nested sync XHRs... */ + if(readyState < 4 && event->event_id == EVENTID_READYSTATECHANGE) { + IDOMEvent_Release(&event->IDOMEvent_iface); + goto update_state; + } + + /* Temporarily increase the dispatch depth to allow this event to be dispatched */ + thread_data->event_dispatch_depth++; + } + + This->xhr->readyState = readyState; + This->xhr->responseText_length = responseText_length; + dispatch_event(&This->xhr->event_target, event); IDOMEvent_Release(&event->IDOMEvent_iface); + if(thread_data) + thread_data->event_dispatch_depth--; + + return NS_OK; } + +update_state: + This->xhr->readyState = readyState; + This->xhr->responseText_length = responseText_length; return NS_OK; }
@@ -598,15 +693,6 @@ static HRESULT WINAPI HTMLXMLHttpRequest_open(IHTMLXMLHttpRequest *iface, BSTR b } }
- /* Note: Starting with Gecko 30.0 (Firefox 30.0 / Thunderbird 30.0 / SeaMonkey 2.27), - * synchronous requests on the main thread have been deprecated due to the negative - * effects to the user experience. - */ - if(!V_BOOL(&varAsync)) { - FIXME("Synchronous request is not supported yet\n"); - return E_FAIL; - } - hres = variant_to_nsastr(varUser, &user); if(FAILED(hres)) return hres; @@ -630,6 +716,9 @@ static HRESULT WINAPI HTMLXMLHttpRequest_open(IHTMLXMLHttpRequest *iface, BSTR b return hres; }
+ /* Set this here, Gecko dispatches nested sync XHR readyState changes for OPENED (see HandleEvent) */ + This->synchronous = !V_BOOL(&varAsync); + nsres = nsIXMLHttpRequest_Open(This->nsxhr, &method, &url, !!V_BOOL(&varAsync), &user, &password, 1 + (V_VT(&varPassword) != VT_EMPTY ? 2 : V_VT(&varUser) != VT_EMPTY));
@@ -640,6 +729,7 @@ static HRESULT WINAPI HTMLXMLHttpRequest_open(IHTMLXMLHttpRequest *iface, BSTR b
if(NS_FAILED(nsres)) { ERR("nsIXMLHttpRequest_Open failed: %08lx\n", nsres); + This->synchronous = FALSE; return E_FAIL; }
@@ -676,13 +766,18 @@ static HRESULT WINAPI HTMLXMLHttpRequest_send(IHTMLXMLHttpRequest *iface, VARIAN return E_NOTIMPL; }
- if(NS_SUCCEEDED(nsres)) - nsres = nsIXMLHttpRequest_Send(This->nsxhr, (nsIVariant*)nsbody); + if(NS_SUCCEEDED(nsres)) { + if(This->synchronous) + nsres = sync_xhr_send(This->nsxhr, (nsIVariant*)nsbody); + else + nsres = nsIXMLHttpRequest_Send(This->nsxhr, (nsIVariant*)nsbody); + } + if(nsbody) nsIWritableVariant_Release(nsbody); if(NS_FAILED(nsres)) { ERR("nsIXMLHttpRequest_Send failed: %08lx\n", nsres); - return E_FAIL; + return map_nsresult(nsres); }
return S_OK;
From: Gabriel Ivăncescu gabrielopcode@gmail.com
Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com --- dlls/mshtml/tests/xhr.js | 2 +- dlls/mshtml/tests/xmlhttprequest.c | 8 ++++---- dlls/mshtml/xmlhttprequest.c | 32 +++++++++++++++++++++++++++++- 3 files changed, 36 insertions(+), 6 deletions(-)
diff --git a/dlls/mshtml/tests/xhr.js b/dlls/mshtml/tests/xhr.js index c6d8b400af0..7799480e14a 100644 --- a/dlls/mshtml/tests/xhr.js +++ b/dlls/mshtml/tests/xhr.js @@ -155,7 +155,7 @@ function test_sync_xhr() {
window.setTimeout(function() { var r = a.join(","); - todo_wine_if(document.documentMode < 10 || document.documentMode >= 11). + todo_wine_if(document.documentMode >= 11). ok(r === "0,1,2,3," + (document.documentMode < 10 ? "sync_xhr(1),sync_xhr(2),sync_xhr(3)," : "") + "sync_xhr(4)," + (document.documentMode < 10 ? "nested(1),nested(2),nested(3)," : "") + "nested(4),click," + (document.documentMode < 11 ? "dblclick," : "") + diff --git a/dlls/mshtml/tests/xmlhttprequest.c b/dlls/mshtml/tests/xmlhttprequest.c index 2415ac8eb0f..6226461a502 100644 --- a/dlls/mshtml/tests/xmlhttprequest.c +++ b/dlls/mshtml/tests/xmlhttprequest.c @@ -712,11 +712,11 @@ static void test_sync_xhr(IHTMLDocument2 *doc, const WCHAR *xml_url, const WCHAR loading_cnt = 0; hres = IHTMLXMLHttpRequest_send(xhr, vempty); ok(hres == S_OK, "send failed: %08lx\n", hres); - todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_opened); - todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_headers_received); - todo_wine CHECK_CALLED(xmlhttprequest_onreadystatechange_loading); + CHECK_CALLED(xmlhttprequest_onreadystatechange_opened); + CHECK_CALLED(xmlhttprequest_onreadystatechange_headers_received); + CHECK_CALLED(xmlhttprequest_onreadystatechange_loading); CHECK_CALLED(xmlhttprequest_onreadystatechange_done); - todo_wine ok(loading_cnt == 1, "loading_cnt = %d\n", loading_cnt); + ok(loading_cnt == 1, "loading_cnt = %d\n", loading_cnt);
text = NULL; hres = IHTMLXMLHttpRequest_getResponseHeader(xhr, content_type, &text); diff --git a/dlls/mshtml/xmlhttprequest.c b/dlls/mshtml/xmlhttprequest.c index b932e9df0a7..dc33fdce57e 100644 --- a/dlls/mshtml/xmlhttprequest.c +++ b/dlls/mshtml/xmlhttprequest.c @@ -142,6 +142,7 @@ struct HTMLXMLHttpRequest { size_t responseText_length; response_type_t response_type; BOOL synchronous; + HTMLInnerWindow *window; nsIXMLHttpRequest *nsxhr; XMLHttpReqEventListener *event_listener; }; @@ -274,6 +275,7 @@ static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *i XMLHttpReqEventListener *This = impl_from_nsIDOMEventListener(iface); thread_data_t *thread_data; size_t responseText_length; + compat_mode_t compat_mode; const PRUnichar *text; nsAString nsstr; DOMEvent *event; @@ -304,7 +306,8 @@ static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *i } }
- hres = create_event_from_nsevent(nsevent, dispex_compat_mode(&This->xhr->event_target.dispex), &event); + compat_mode = dispex_compat_mode(&This->xhr->event_target.dispex); + hres = create_event_from_nsevent(nsevent, compat_mode, &event); if(SUCCEEDED(hres) ){ if(!(thread_data = get_thread_data(FALSE)) || thread_data->blocking_event_dispatch_depth == ~0) thread_data = NULL; @@ -336,6 +339,30 @@ static nsresult NSAPI XMLHttpReqEventListener_HandleEvent(nsIDOMEventListener *i
/* Temporarily increase the dispatch depth to allow this event to be dispatched */ thread_data->event_dispatch_depth++; + + /* IE10+ only send readystatechange event when it is DONE for sync XHRs, but older modes + send all the others here, including OPENED state change (even if it was opened earlier). */ + if(compat_mode < COMPAT_MODE_IE10 && event->event_id == EVENTID_READYSTATECHANGE) { + DOMEvent *readystatechange_event; + unsigned i; + + for(i = 1; i < 4; i++) { + hres = create_document_event(This->xhr->window->doc, EVENTID_READYSTATECHANGE, &readystatechange_event); + if(FAILED(hres)) + break; + + This->xhr->readyState = i; + dispatch_event(&This->xhr->event_target, readystatechange_event); + IDOMEvent_Release(&readystatechange_event->IDOMEvent_iface); + + /* Check if it was aborted (or somehow changed) in the handler */ + if(This->xhr->readyState != i) { + IDOMEvent_Release(&event->IDOMEvent_iface); + thread_data->event_dispatch_depth--; + return NS_OK; + } + } + } }
This->xhr->readyState = readyState; @@ -415,6 +442,7 @@ static ULONG WINAPI HTMLXMLHttpRequest_Release(IHTMLXMLHttpRequest *iface) if(!ref) { if(This->event_listener) detach_xhr_event_listener(This->event_listener); + IHTMLWindow2_Release(&This->window->base.IHTMLWindow2_iface); release_event_target(&This->event_target); release_dispex(&This->event_target.dispex); nsIXMLHttpRequest_Release(This->nsxhr); @@ -1593,6 +1621,8 @@ static HRESULT WINAPI HTMLXMLHttpRequestFactory_create(IHTMLXMLHttpRequestFactor return E_OUTOFMEMORY; } ret->nsxhr = nsxhr; + ret->window = This->window; + IHTMLWindow2_AddRef(&This->window->base.IHTMLWindow2_iface);
ret->IHTMLXMLHttpRequest_iface.lpVtbl = &HTMLXMLHttpRequestVtbl; ret->IHTMLXMLHttpRequest2_iface.lpVtbl = &HTMLXMLHttpRequest2Vtbl;
Jacek Caban (@jacek) commented about dlls/mshtml/htmlevent.c:
- if(thread_data->event_dispatch_depth == thread_data->blocking_event_dispatch_depth) {
struct queued_event *queued_event = malloc(sizeof(*queued_event));if(!queued_event) {ERR("no memory to queue event\n");return E_OUTOFMEMORY;}queued_event->event = event;queued_event->event_target = event_target;IDOMEvent_AddRef(&event->IDOMEvent_iface);IEventTarget_AddRef(&event_target->IEventTarget_iface);list_add_tail(&thread_data->queued_events_list, &queued_event->entry);return S_OK;- }
Things like `preventDefault()` will not work for dispatches delayed like that. Can we somehow assume that those will be delayed by Gecko?
On Mon Feb 6 16:43:23 2023 +0000, Jacek Caban wrote:
Things like `preventDefault()` will not work for dispatches delayed like that. Can we somehow assume that those will be delayed by Gecko?
Not entirely sure. I don't think it does something special in regards to defaults, but in nsXMLHttpRequest::Send (dom/base/nsXMLHttpRequest.cpp) in the sync spin loop, it does suspend all events that end up on the document during capture (suspendedDoc->SuppressEventHandling), as well as timeouts (which we don't care about), which means all the element events.
Now the question is if there's any events that are not suspended by that in Gecko which have a default… Async XHR events for example, don't have a default, I believe, so those should be safe to be queued? Message events aren't blocked, but we don't use Gecko's message events, so they're irrelevant. Same with storage events.
Maybe the question should be, can you think of an event that does? I hope not, because I've no idea how to fix it if there is… :)
Regardless, I should add a comment to that effect when queuing the event, to say why it should work unless we find an event that doesn't, because it's not obvious.
I also found some other small issues that I will fix (`sync_xhr_send` should also check the queued_xhr_events_list when posting the msg; and I think for sync XHRs <= IE9 we should send all the readystatechange events prior to any progress events also, if any, if we haven't yet, but unfortunately this is hard to test, so it's just safer to fix it).
-
Gabriel Ivăncescu -
Gabriel Ivăncescu (＠insn)
-
Jacek Caban (＠jacek)