Gabriel Ivăncescu : mshtml: Implement overrideMimeType for XMLHttpRequest.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: cbd1ad0570f7b5b3f2c267306ce533268eb9312c
URL:    https://gitlab.winehq.org/wine/wine/-/commit/cbd1ad0570f7b5b3f2c267306ce5332...

Author: Gabriel Ivăncescu 
Date:   Wed Jul 13 20:07:32 2022 +0300

mshtml: Implement overrideMimeType for XMLHttpRequest.

We have to special case empty string since Gecko special cases them, but
IE does not.

Signed-off-by: Gabriel Ivăncescu

---

dlls/mshtml/tests/xhr.js     | 16 ++++++++++++++--
 dlls/mshtml/xmlhttprequest.c | 23 +++++++++++++++++++++--
 2 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/dlls/mshtml/tests/xhr.js b/dlls/mshtml/tests/xhr.js
index 303c4add7b4..8d9af26a943 100644
--- a/dlls/mshtml/tests/xhr.js
+++ b/dlls/mshtml/tests/xhr.js
@@ -71,7 +71,7 @@ function test_xhr() {
 }

function test_content_types() {
-    var xhr = new XMLHttpRequest(), types, i = 0;
+    var xhr = new XMLHttpRequest(), types, i = 0, override = false;
     var v = document.documentMode;

var types = [
@@ -95,7 +95,19 @@ function test_content_types() {
         if(v < 10 || types === xml_types)
             ok(xhr.responseXML !== null, "unexpected null responseXML for " + types[i]);
         else
-            ok(xhr.responseXML === null, "unexpected non-null responseXML for " + types[i]);
+            ok(xhr.responseXML === null, "unexpected non-null responseXML for " + (override ? "overriden " : "") + types[i]);
+
+        if(("overrideMimeType" in xhr) && !override) {
+            override = true;
+            xhr = new XMLHttpRequest();
+            xhr.onload = onload;
+            xhr.open("POST", "echo.php", true);
+            xhr.setRequestHeader("X-Test", "True");
+            xhr.overrideMimeType(types[i]);
+            xhr.send(xml);
+            return;
+        }
+        override = false;

if(++i >= types.length) {
             if(types === xml_types) {
diff --git a/dlls/mshtml/xmlhttprequest.c b/dlls/mshtml/xmlhttprequest.c
index c165218bdef..f21114abcac 100644
--- a/dlls/mshtml/xmlhttprequest.c
+++ b/dlls/mshtml/xmlhttprequest.c
@@ -978,10 +978,29 @@ static HRESULT WINAPI HTMLXMLHttpRequest_private_get_withCredentials(IWineXMLHtt
 static HRESULT WINAPI HTMLXMLHttpRequest_private_overrideMimeType(IWineXMLHttpRequestPrivate *iface, BSTR mimeType)
 {
     HTMLXMLHttpRequest *This = impl_from_IWineXMLHttpRequestPrivate(iface);
+    static const WCHAR generic_type[] = L"application/octet-stream";
+    const WCHAR *type = NULL;
+    WCHAR *lowercase = NULL;
+    nsAString nsstr;
+    nsresult nsres;

-    FIXME("(%p)->(%s)\n", This, debugstr_w(mimeType));
+    TRACE("(%p)->(%s)\n", This, debugstr_w(mimeType));

-    return E_NOTIMPL;
+    if(mimeType) {
+        if(mimeType[0]) {
+            if(!(lowercase = heap_strdupW(mimeType)))
+                return E_OUTOFMEMORY;
+            _wcslwr(lowercase);
+            type = lowercase;
+        }else
+            type = generic_type;
+    }
+
+    nsAString_InitDepend(&nsstr, type);
+    nsres = nsIXMLHttpRequest_SlowOverrideMimeType(This->nsxhr, &nsstr);
+    nsAString_Finish(&nsstr);
+    heap_free(lowercase);
+    return map_nsresult(nsres);
 }

static HRESULT WINAPI HTMLXMLHttpRequest_private_put_onerror(IWineXMLHttpRequestPrivate *iface, VARIANT v)