Q Network Access manager in pyQt Python (Segmentation Fault Core Dumped)

Question

我在 python 中使用 pyQt 开发了一个应用程序，并使用网络浏览器和 table 来显示浏览器请求附带的 headers。这是我的代码：-

import sys
from PyQt4.QtGui import QApplication, QTableWidget, QTableWidgetItem
from PyQt4.QtCore import QUrl  
from PyQt4.QtWebKit import QWebView, QWebPage
from PyQt4.QtGui import QGridLayout, QLineEdit, QWidget, QHeaderView
from PyQt4.QtNetwork import QNetworkAccessManager, QNetworkRequest


class RequestsTable(QTableWidget):
    header = ["url", "status", "content-type","cookies","user_agent"]

    def __init__(self):
        super(RequestsTable, self).__init__()
        self.setColumnCount(5)
        self.setHorizontalHeaderLabels(self.header)
        header = self.horizontalHeader()
        header.setStretchLastSection(True)

    def update(self, data):
        last_row = self.rowCount()
        next_row = last_row + 1
        self.setRowCount(next_row)
        for col, dat in enumerate(data, 0):
            if not dat:
                 continue
            self.setItem(last_row, col, QTableWidgetItem(dat))

class Manager(QNetworkAccessManager):
    def __init__(self, table):
        QNetworkAccessManager.__init__(self)
        self.finished.connect(self._finished)
        self.table = table

    def _finished(self, reply):
        user_agent = str(reply.request().rawHeader("User-Agent"))
        headers = reply.rawHeaderPairs()
        headers = {str(k):str(v) for k,v in headers}
        content_type = headers.get("Content-Type")
        url = reply.url().toString()
        status =    reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)
        status, ok = status.toInt()
        cookies = headers.get("Set-Cookie")
        self.table.update([url, str(status),             content_type,cookies,user_agent])


if __name__ == "__main__":
    app = QApplication(sys.argv)

    grid = QGridLayout()
    browser = QWebView()
    browser.load(QUrl("http://www.indiatimes.com/"))
    def on_html_available():
        page = QWebPage()
        page.setNetworkAccessManager(manager)

        # problem is here
        browser.setPage(page)
        # if i dont use above line then it don't show any error but the headers don't get append in the table but if i use the above line it shows me the error segmentation fault

    browser.loadFinished.connect(on_html_available)
    requests_table = RequestsTable()
    manager = Manager(requests_table)
    grid.addWidget(browser, 3, 0)
    grid.addWidget(requests_table, 4, 0)
    main_frame = QWidget()
    main_frame.setLayout(grid)
    main_frame.show()
    sys.exit(app.exec_())

但是上面的代码显示错误

"core dumped segmentation fault"?

可能是什么问题？请帮我解决这个问题。

Answer 1

显示此错误是因为您再次设置浏览器页面 html 已完成，这是错误的，要访问网络访问管理器，您应该先获取管理器，然后使用页面设置管理器，然后设置浏览器页面。如果您不明白，请告诉我。

Q Network Access manager in pyQt Python (Segmentation Fault Core Dumped)

Q Network Access manager in pyQt Python (Segmentation Fault Core Dumped)

python

pyqt

qwebview