Python QEventLoop.quit方法代码示例

# 需要导入模块: from qgis.PyQt.QtCore import QEventLoop [as 别名]
# 或者: from qgis.PyQt.QtCore.QEventLoop import quit [as 别名]

#.........这里部分代码省略.........
                        if metadata.expirationDate().isNull():
                            metadata.setExpirationDate(
                                QDateTime.currentDateTime().addSecs(self.default_cache_expiration * 60 * 60))
                            cache.updateMetaData(metadata)
                            self.log(
                                "Default expiration date has been set: %s (%d h)" % (url, self.default_cache_expiration))

                if reply.isReadable():
                    data = reply.readAll()
                    if self.redirected_urls.has_key(url):
                        url = self.redirected_urls[url]

                    self.fetchedFiles[url] = data
                else:
                    qDebug("http status code: " + str(httpStatusCode))

                # self.emit(SIGNAL('replyFinished(QString, int, int)'), url, reply.error(), isFromCache)
                self.replyFinished.emit(url, reply.error(), isFromCache)
        else:
            if self.sync and httpStatusCode == 404:
                self.fetchedFiles[url] = self.NOT_FOUND
            self.fetchErrors += 1
            if self.errorStatus == self.NO_ERROR:
                self.errorStatus = self.UNKNOWN_ERROR

        reply.deleteLater()

        if debug_mode:
            qDebug("queue: %d, requesting: %d" % (len(self.queue), len(self.requestingUrls)))

        if len(self.queue) + len(self.requestingUrls) == 0:
            # all replies have been received
            if self.sync:
                self.logT("eventLoop.quit()")
                self.eventLoop.quit()
            else:
                self.timer.stop()
        elif len(self.queue) > 0:
            # start fetching the next file
            self.fetchNext()
        self.log("replyFinishedSlot End: %s" % url)

    def fetchNext(self):
        if len(self.queue) == 0:
            return
        url = self.queue.pop(0)
        self.log("fetchNext: %s" % url)

        request = QNetworkRequest(QUrl(url))
        request.setRawHeader("User-Agent", self.userAgent)
        reply = QgsNetworkAccessManager.instance().get(request)
        reply.finished.connect(self.replyFinishedSlot)
        self.requestingUrls.append(url)
        self.replies.append(reply)
        return reply

    def fetchFiles(self, urlList, timeout_ms=0):
        self.log("fetchFiles()")
        self.sync = True
        self.queue = []
        self.redirected_urls = {} 
        self.clearCounts()
        self.errorStatus = Downloader.NO_ERROR
        self.fetchedFiles = {}

        if len(urlList) == 0:

# 需要导入模块: from qgis.PyQt.QtCore import QEventLoop [as 别名]
# 或者: from qgis.PyQt.QtCore.QEventLoop import quit [as 别名]
class Nominatim(object):
    """Manage connexion to Nominatim."""

    def __init__(self,
                 url="https://nominatim.openstreetmap.org/search?format=json"):
        """
        Constructor
        @param url:URL of Nominatim
        @type url:str
        """

        self.__url = url
        self.network = QgsNetworkAccessManager.instance()
        self.data = None
        self.network_reply = None
        self.loop = None

    def query(self, query):
        """
        Perform a nominatim query

        @param query: Query to execute
        @type query: str

        @raise NetWorkErrorException

        @return: the result of the query
        @rtype: str
        """

        url_query = QUrl(self.__url)

        # query = QUrl.toPercentEncoding(query)
        query_string = QUrlQuery()
        query_string.addQueryItem('q', query)
        query_string.addQueryItem('format', 'json')
        query_string.addQueryItem('info', 'QgisQuickOSMPlugin')
        url_query.setQuery(query_string)

        request = QNetworkRequest(url_query)
        # request.setRawHeader("User-Agent", "QuickOSM")
        self.network_reply = self.network.get(request)
        self.loop = QEventLoop()
        self.network.finished.connect(self._end_of_request)
        self.loop.exec_()

        if self.network_reply.error() == QNetworkReply.NoError:
            return json.loads(self.data)
        else:
            raise NetWorkErrorException(suffix="Nominatim API")

    def _end_of_request(self):
        self.data = self.network_reply.readAll().data().decode('utf-8')
        self.loop.quit()

    def get_first_polygon_from_query(self, query):
        """
        Get first OSM_ID of a Nominatim area

        @param query: Query to execute
        @type query: str

        @raise NominatimAreaException:

        @return: First relation's osm_id
        @rtype: str
        """
        data = self.query(query)
        for result in data:
            if result['osm_type'] == "relation":
                return result['osm_id']

        # If no result has been return
        raise NominatimAreaException

    def get_first_point_from_query(self, query):
        """
        Get first longitude, latitude of a Nominatim point

        @param query: Query to execute
        @type query: str

        @raise NominatimAreaException:

        @return: First relation's osm_id
        @rtype: str
        """
        data = self.query(query)
        for result in data:
            if result['osm_type'] == "node":
                return result['lon'], result['lat']

        # If no result has been return
        raise NominatimAreaException