wininet/tests: Test retrieving http requests from cache.

dlls/wininet/tests/http.c

@@ -1202,6 +1202,19 @@ static void test_http_cache(void)
     ok(file != INVALID_HANDLE_VALUE, "Could not create file: %u\n", GetLastError());
     CloseHandle(file);
 
+    /* Send the same request, requiring it to be retrieved from the cache */
+    request = HttpOpenRequest(connect, "GET", "/hello.html", NULL, NULL, NULL, INTERNET_FLAG_FROM_CACHE, 0);
+
+    ret = HttpSendRequest(request, NULL, 0, NULL, 0);
+    ok(ret, "HttpSendRequest failed\n");
+
+    size = sizeof(buf);
+    ret = InternetReadFile(request, buf, sizeof(buf), &size);
+    ok(ret, "InternetReadFile failed: %u\n", GetLastError());
+    ok(size == 100, "size = %u\n", size);
+
+    ok(InternetCloseHandle(request), "Close request handle failed\n");
+
     request = HttpOpenRequestA(connect, NULL, "/", NULL, NULL, types, INTERNET_FLAG_NO_CACHE_WRITE, 0);
     ok(request != NULL, "Failed to open request handle err %u\n", GetLastError());
 
@@ -1602,6 +1615,7 @@ static const char page1[] =
 struct server_info {
     HANDLE hEvent;
     int port;
+    int num_testH_retrievals;
 };
 
 static DWORD CALLBACK server_thread(LPVOID param)
@@ -1792,6 +1806,17 @@ static DWORD CALLBACK server_thread(LPVOID param)
         {
             send(c, page1, sizeof page1-1, 0);
         }
+        if (strstr(buffer, "GET /testH"))
+        {
+            si->num_testH_retrievals++;
+            if (!strstr(buffer, "Content-Length: 0"))
+            {
+                send(c, okmsg, sizeof okmsg-1, 0);
+                send(c, page1, sizeof page1-1, 0);
+            }
+            else
+                send(c, notokmsg, sizeof notokmsg-1, 0);
+        }
 
         shutdown(c, 2);
         closesocket(c);
@@ -2575,6 +2600,70 @@ static void test_options(int port)
     InternetCloseHandle(ses);
 }
 
+static void test_url_caching(int port, int *num_retrievals)
+{
+    HINTERNET hi, hc, hr;
+    DWORD r, count;
+    char buffer[0x100];
+
+    ok(*num_retrievals == 0, "expected 0 retrievals prior to test\n");
+
+    hi = InternetOpen(NULL, INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
+    ok(hi != NULL, "open failed\n");
+
+    hc = InternetConnect(hi, "localhost", port, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
+    ok(hc != NULL, "connect failed\n");
+
+    /* Pre-load the cache: */
+    hr = HttpOpenRequest(hc, "GET", "/testH", NULL, NULL, NULL, 0, 0);
+    ok(hr != NULL, "HttpOpenRequest failed\n");
+
+    r = HttpSendRequest(hr, NULL, 0, NULL, 0);
+    ok(r, "HttpSendRequest failed\n");
+
+    ok(*num_retrievals == 1, "expected 1 retrievals\n");
+
+    count = 0;
+    memset(buffer, 0, sizeof buffer);
+    SetLastError(0xdeadbeef);
+    r = InternetReadFile(hr, buffer, sizeof buffer, &count);
+    ok(r, "InternetReadFile failed %u\n", GetLastError());
+    ok(count == sizeof page1 - 1, "count was wrong\n");
+    ok(!memcmp(buffer, page1, sizeof page1), "http data wrong\n");
+
+    InternetCloseHandle(hr);
+
+    /* Send the same request, requiring it to be retrieved from the cache */
+    hr = HttpOpenRequest(hc, "GET", "/testH", NULL, NULL, NULL, INTERNET_FLAG_FROM_CACHE, 0);
+    ok(hr != NULL, "HttpOpenRequest failed\n");
+
+    r = HttpSendRequest(hr, NULL, 0, NULL, 0);
+    /* Older Windows versions succeed with this request, newer ones fail with
+     * ERROR_FILE_NOT_FOUND.  Accept either, as the older version allows us
+     * to verify that the server isn't contacted.
+     */
+    if (!r)
+        ok(GetLastError() == ERROR_FILE_NOT_FOUND,
+           "expected ERROR_FILE_NOT_FOUND, got %d\n", GetLastError());
+    else
+    {
+        /* The server shouldn't be contacted for this request. */
+        todo_wine
+        ok(*num_retrievals == 1, "expected 1 retrievals\n");
+
+        count = 0;
+        memset(buffer, 0, sizeof buffer);
+        SetLastError(0xdeadbeef);
+        r = InternetReadFile(hr, buffer, sizeof buffer, &count);
+        ok(r, "InternetReadFile failed %u\n", GetLastError());
+        ok(count == sizeof page1 - 1, "count was wrong\n");
+        ok(!memcmp(buffer, page1, sizeof page1), "http data wrong\n");
+    }
+
+    InternetCloseHandle(hc);
+    InternetCloseHandle(hi);
+}
+
 static void test_http_connection(void)
 {
     struct server_info si;
@@ -2583,6 +2672,7 @@ static void test_http_connection(void)
 
     si.hEvent = CreateEvent(NULL, 0, 0, NULL);
     si.port = 7531;
+    si.num_testH_retrievals = 0;
 
     hThread = CreateThread(NULL, 0, server_thread, (LPVOID) &si, 0, &id);
     ok( hThread != NULL, "create thread failed\n");
@@ -2611,6 +2701,7 @@ static void test_http_connection(void)
     test_HttpSendRequestW(si.port);
     test_last_error(si.port);
     test_options(si.port);
+    test_url_caching(si.port, &si.num_testH_retrievals);
 
     /* send the basic request again to shutdown the server thread */
     test_basic_request(si.port, "GET", "/quit");