python – PyQt Webkit和html表单：获取输出和关闭窗口

2019年8月4日 276次阅读

我试图获得一个无边框
python PyQt webkit窗口来显示单个网站html表单.单击“发送”时,表单值应保存在字典中并关闭窗口.

到目前为止(在SO的帮助下)我有无边框窗口并且可以获取输入.但是,缺少两件事：

>按发送后关闭窗口.
>获取字典元素中的输入(请注意,元素的键对应于html表单名称).

(可能反过来会更好,但1似乎更难)

到目前为止我的代码是：

import sys

from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *

elements = {"like":"", "text": ""}

class MyWebPage(QWebPage):
    def acceptNavigationRequest(self, frame, req, nav_type):
        if nav_type == QWebPage.NavigationTypeFormSubmitted:
            text = "<br/>\n".join(["%s: %s" % pair for pair in req.url().queryItems()])
            print(text)
            return True
        else:
            return super(MyWebPage, self).acceptNavigationRequest(frame, req, nav_type)


class Window(QWidget):
    def __init__(self, html):
        super(Window, self).__init__()
        self.setWindowFlags(Qt.FramelessWindowHint)
        view = QWebView(self)
        layout = QVBoxLayout(self)
        layout.addWidget(view)
        view.setPage(MyWebPage())
        view.setHtml(html)


# setup the html form
html = """
<form action="" method="get">
Like it?
<input type="radio" name="like" value="yes"/> Yes
<input type="radio" name="like" value="no" /> No
<br/><input type="text" name="text" value="Hello" />
<input type="submit" name="submit" value="Send"/>
</form>
"""

def main():
    app = QApplication(sys.argv)

    window = Window(html)
    window.show()
    app.exec_()

if __name__ == "__main__":
    main()

一个完美的答案不仅会显示如何(a)保存输入和(b)关闭窗口,但(c)还删除html页面周围剩余的小灰色边框.

更新：我使用Python 2.

最佳答案 要将表单数据放入dict中,最好使用python标准库中的
unquote_plus(与QUrl不同)它可以处理加号和百分比编码.

要关闭窗口,您可以从Web页面发出formSubmitted信号,并将其连接到主窗口上的处理程序.然后,此处理程序可以在主窗口上调用close(),对表单数据执行所有处理,然后最终退出()应用程序.

要删除页面周围的边框,请将主布局的contentsMargins设置为零.

以下是您的脚本的修订版本,它实现了上述想法：

import sys
from urllib import unquote_plus

from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *

class MyWebPage(QWebPage):
    formSubmitted = pyqtSignal(QUrl)

    def acceptNavigationRequest(self, frame, req, nav_type):
        if nav_type == QWebPage.NavigationTypeFormSubmitted:
            self.formSubmitted.emit(req.url())
        return super(MyWebPage, self).acceptNavigationRequest(frame, req, nav_type)

class Window(QWidget):
    def __init__(self, html):
        super(Window, self).__init__()
        self.setWindowFlags(Qt.FramelessWindowHint)
        view = QWebView(self)
        layout = QVBoxLayout(self)
        layout.addWidget(view)
        layout.setContentsMargins(0, 0, 0, 0)
        view.setPage(MyWebPage())
        view.setHtml(html)
        view.page().formSubmitted.connect(self.handleFormSubmitted)

    def handleFormSubmitted(self, url):
        self.close()
        elements = {}
        for key, value in url.encodedQueryItems():
            key = unquote_plus(bytes(key)).decode('utf8')
            value = unquote_plus(bytes(value)).decode('utf8')
            elements[key] = value
        # do stuff with elements...
        for item in elements.iteritems():
            print '"%s" = "%s"' % item
        qApp.quit()

# setup the html form
html = """
<form action="" method="get">
Like it?
<input type="radio" name="like" value="yes"/> Yes
<input type="radio" name="like" value="no" /> No
<br/><input type="text" name="text" value="" />
<input type="submit" name="submit" value="Send"/>
</form>
"""

def main():
    app = QApplication(sys.argv)

    window = Window(html)
    window.show()
    app.exec_()

if __name__ == "__main__":
    main()
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