我正在使用QNetworkAccessManager
下载图像。
第一次,我必须指定图像的 url。
但方式不同。
例如,我从Wikipedia Top Page Japanese的图像中获取。
有一些上传图片。
如果我复制文本和图像,然后将它们粘贴到我的编辑器中,则 html 文本包含 url。
即使我将它传递给QNetworkRequest
,我也无法下载图像。
在我挖掘 url 并到达Wikipedia Commons中的图像文件后,如果我将 url 传递到QNetworkRequest
,我可以下载图像。
我已经明白网址必须准确,但我不知道如何区分它们。
您知道如何每次都以编程方式下载图像而不会出错吗?
有没有办法提前知道确切的网址?
我对网络了解不多。
我经常接受UnknownContentError
示例代码的使用方法
Ctrl+C复制文本和图片(请包含图片。) Ctrl+V粘贴 html 并下载图片
Q直接下载图片。我只能通过这个下载。
示例代码
from PySide import QtCore, QtGui, QtNetwork
from bs4 import BeautifulSoup
import sys, os, re
class Widget(QtGui.QTextEdit):
def __init__(self, parent=None):
super(Widget, self).__init__()
def keyPressEvent(self, event):
if event.modifiers() == QtCore.Qt.KeyboardModifier.ControlModifier and event.key() == QtCore.Qt.Key_C:
tc = self.textCursor()
mimedata = self.createMimeDataFromSelection()
clipboard = QtGui.QApplication.clipboard()
clipboard.setMimeData(mimedata)
start = tc.selectionStart()
end = tc.selectionEnd()
char = tc.charFormat()
char.clearBackground()
tc.setCharFormat(char)
return
elif event.modifiers() == QtCore.Qt.KeyboardModifier.ControlModifier and event.key() == QtCore.Qt.Key_V:
clipboard = QtGui.QApplication.clipboard()
html = clipboard.mimeData().html()
pous = BeautifulSoup(html,"lxml")
image_items = pous.find_all('a', href=re.compile('(\.jpg|\.png|\.svg|\.gif)$'))
image_urls = [item.get('href') for item in image_items]
for i, url in enumerate(image_urls):
#indirect url https://ja.wikipedia.org/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Oguri_Cap_in_Yushun_Stallion_station.jpg
print(url)
request = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
self.nam = QtNetwork.QNetworkAccessManager()
self.nam.finished[QtNetwork.QNetworkReply].connect(self.doReply)
self.nam.get(request)
if event.key() == QtCore.Qt.Key_Q:
self.doRequest()
def doRequest(self):
# direct url & exact url
url = "https://upload.wikimedia.org/wikipedia/commons/c/c3/Oguri_Cap_in_Yushun_Stallion_station.jpg"
req = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
self.nam = QtNetwork.QNetworkAccessManager()
self.nam.finished[QtNetwork.QNetworkReply].connect(self.doReply)
self.nam.get(req)
def doReply(self, reply):
er = reply.error()
if er == QtNetwork.QNetworkReply.NoError:
data = reply.readAll()
self.saveImage(data)
else:
print( "Error occured: ", er)
print( reply.errorString())
def saveImage(self, data):
try:
im = QtGui.QImageWriter()
im.setFileName(os.path.join(os.getcwd(),"wiki_topimage.png"))
imd = QtGui.QImage()
imd_bool = imd.loadFromData(data.data())
im.write(imd)
except Exception as e:
print(e)
def main():
QtCore.QCoreApplication.addLibraryPath(os.path.join(os.getcwd(),"plugins"))
try:
QtGui.QApplication([])
except Exception as e:
print("error", e)
w = Widget()
w.show()
sys.exit(QtGui.QApplication.exec_())
if __name__ == "__main__":
main()