（四）使用watir对来对JavaScript Pop Ups进行处理
一直都是在半知半解的状态下使用autoit来对Javascript pop ups进行处理，虽然可以处理成功，但是还是不太明确为什么要这样做才可以点击到“确定”按钮等。前阵子为了使脚本能够在不干扰本机用户的使用情况下正常运行，搜索资料查找到一个非常有用的方法。
（我想如果你仔细读懂了这 个链接中所给出的内容，你处理弹出对话框的问题应该也没有太多的问题了。http://wiki.openqa.org/display/WTR/JavaScript+Pop+Ups）
该方法可以方便的让你的脚本正常运行，并且不影响本机用户的正常运行。并且这个方法不需要依靠autoit来运行脚本，仅仅使用win32ole方法来对弹出的对话框进行出来。
步骤为：
（1） 首先向库文件ie-class.rb添加如下代码，(库文件所在位置C:\ruby\lib\ruby\gems\1.8\gems\watir-1.6.2\lib\watir\ie-class.rb)
#/////////////////////////////////////////////////////////////////////////////
#Name: clickprompt
#Description: Waits for the popup to appear and then clicks the ok or cancel button
#
#Arguments: button: The button to be pressed – “OK” or “CANCEL”
# txt: Text to be passed into the prompt dialog box
# waitTime: the waiting time caluclated as waitingtime/0.2 currently set to 50 seconds
#Returns: This returns the popup text if popup is found or ” if no popup is found
#/////////////////////////////////////////////////////////////////////////////
def clickprompt(but=”OK”,txt =”", waitTime = 10)
tim = 0
poptxt= ”
while tim < waitTime
sleep 0.2
pophwnd = Win32API.new(”user32″, “GetWindow”, ‘Li’, ‘L’).Call(@ie.hwnd.to_i, 6)
# the above returns any popup windows that are present for the specific window
tim += 0.2
tim += waitTime if pophwnd != 0
end
return ” if pophwnd == 0
button = but.upcase
outval = ‘ ‘ * 30
Win32API.new(”user32″, “GetWindowText”, ‘Lpi’, ‘L’).Call(pophwnd,outval,30)
popwndtitle = outval.rstrip.chomp(”00″) # window title stored here
outval = nil
#poptype = 0
#alert and confirm have ie6 – Microsoft Internet Explorer
#ie7 – Windows Internet Explorer
#ie8 – Message from webpage
if popwndtitle.include?(”Microsoft Internet Explorer”) ||
popwndtitle.include?(”Windows Internet Explorer”) ||
popwndtitle.include?(”Message from webpage”)
#confirm and alerts have the above 3 window titles
# poptype =1 means this is a javascript alert tag
#poptype = 1
poptxt = handlepopup1(pophwnd,button)
elsif popwndtitle.include?(”Explorer User Prompt”)
#prompts have the above window title
#poptype = 2
poptxt = handlepopup2(pophwnd,button, txt)
elsif popwndtitle.include?(”Connect to”)
#authentication dialog
#also make sure the username and password text fields are present – if present we got the auth dialog
cntrlhwnd = 0
cntrlhwnd = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 1002)
#poptype = 3 if cntrlhwnd != 0 #verified the 2 textboxes are present to enter the values
return ” if cntrlhwnd == 0
poptxt = handlepopup3(pophwnd,button, prompt)
end
return poptxt
end
def handlepopup1(pophwnd, button)
# handles the alerts and confirm dialogs
#Yes there is a popupwindow… hence get the controlhandle for the text control – 65535
cntrlhwnd = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 65535)
#now get the text from the popup
outval = ‘ ‘ * 900
Win32API.new(”user32″, “GetWindowText”, ‘Lpi’, ‘L’).Call(cntrlhwnd,outval, 900)
poptext = outval.rstrip.chomp(”00″)
outval = nil
#confirm ok-1 and cancel-2, alert ok-2
cntrlhwndOK = 0
cntrlhwndCANCEL = 0
cntrlhwndOK = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 1)
if cntrlhwndOK == 0 # only 1 button alert
cntrlhwndOK = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 2)
clickWin32Button(cntrlhwndOK) # done clicking javascript ok button
return poptext
else # this is a confirm with 2 buttons
cntrlhwndCANCEL = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 2)
end
button.include?(”OK”) ? clickWin32Button(cntrlhwndOK) : clickWin32Button(cntrlhwndCANCEL)
#clickWin32Button(cntrlhwndCANCEL)
return poptext
end
private :handlepopup1
def handlepopup2(pophwnd, button, prompt)
#handles prompt boxes which takes a value as input
cntrlhwndOK = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 1)
cntrlhwndCANCEL = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 2)
# get handle to the text control from the prompt box
cntrlpromptText = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 8132)
#now get the text from the popup
outval = ‘ ‘ * 200
Win32API.new(”user32″, “GetWindowText”, ‘Lpi’, ‘L’).Call(cntrlpromptText,outval, 200)
poptext = outval.rstrip.chomp(”00″)
outval = nil
cntrltextarea = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 8133)
if prompt.size != 0
sendmessage = Win32API.new(”user32″, “SendMessage”, ‘LLpp’, ‘L’)
sendmessage.Call(cntrltextarea, 0×000C, ”, prompt) # calling sendmessage with WM_SETTEXT
end
button.include?(”OK”) ? clickWin32Button(cntrlhwndOK) : clickWin32Button(cntrlhwndCANCEL)
return poptext
end
private :handlepopup2
def handlepopup3(pophwnd, button, prompt)
# handles the auth dialog box , 3 tries then the 401 page is shown
cntrlhwnd = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 1002)
cntrlusername = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(cntrlhwnd, 1003)
cntrlpassword = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(cntrlhwnd, 1005)
if prompt.size == 2
sendmessage = Win32API.new(”user32″, “SendMessage”, ‘LLpp’, ‘L’)
sendmessage.Call(cntrlusername, 0×000C, ”, prompt[0]) # calling sendmessage with WM_SETTEXT
sendmessage.Call(cntrlpassword, 0×000C, ”, prompt[1]) # calling sendmessage with WM_SETTEXT
end
cntrlhwndOK = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 1)
cntrlhwndCANCEL = Win32API.new(”user32″, “GetDlgItem”, ‘Li’, ‘L’).Call(pophwnd, 2)
button.include?(”OK”) ? clickWin32Button(cntrlhwndOK) : clickWin32Button(cntrlhwndCANCEL)
end
private :handlepopup3
def clickWin32Button(cntrlhwnd)
Win32API.new(”user32″, “SendMessage”,’LLLL’,'L’).Call(cntrlhwnd, 0×0006, 1,0)
Win32API.new(”user32″, “SendMessage”,’LLLL’,'L’).Call(cntrlhwnd, 0×00F5, 0,0)
end
private :clickWin32Button
（2）对于系统语言的不同，浏览器弹出来的对话框及对话框中的一些按钮也是不尽相同的，所以可能需要像你修改下刚刚所添加进来的clickprompt方法。
比如在中文vista操作系统下的ie7浏览器，弹出来的对话框的title值为中文，所以需要修改下 clickprompt方法下的if语句
if popwndtitle.include?(”Microsoft Internet Explorer”) ||
popwndtitle.include?(”Windows Internet Explorer”) ||
popwndtitle.include?(”Message from webpage”) ||popupwndtitle.include?(”来自网页的消息”)
