【发布时间】:2020-12-23 16:06:02
【问题描述】:
我们的组织使用 Qlik Sense Enterprise,我们正在寻求自动化用于可视化的数据的下载过程(格式可以是 excel 或 csv),而不是导致以下结果的手动过程(显示截取的屏幕截图):
对于我们的用例,假设只有一个应用程序内部有一张工作表,并且该工作表有 3 个可视化。
我编写了一个当前已连接到 localhost 的 python 脚本,并且我能够使用 Qlik Engine JSON API 检索 app_id、sheet_id 和 3 个图表的 id。代码的工作方式如下:
- 获取 doc_list (app_list)
- 选择应用,因为我们只有一个应用,所以我们选择索引为 0
- 创建会话对象(我看到 Dev Hub 上的 Qlik Engine 表现出这种行为,这就是我执行此步骤的原因)
- 获取应用的布局
- 选择工作表,因为我们只有一张工作表,所以我们选择索引为 0
- 遍历可视化并打印其名称
我提供了以下代码供您参考,pastebin 链接可以访问here
import requests
import websocket, ssl
import json, csv
import os, time
from pprint import pprint
#Connecting to the server. The lines below will be replaced by the certificates and headers for enterprise usage later
ws = websocket.WebSocket()
ws.connect("ws://localhost:4848/app/")
#For getting the doc (app) list
doclist_req = {
"handle": -1,
"method": "GetDocList",
"params": [],
"outKey": -1,
"id": 1
}
ws.send(json.dumps(doclist_req))
result = ws.recv()
ws.send(json.dumps(doclist_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()
#For opening the doc (app)
app_req = {
"jsonrpc": "2.0",
"method": "OpenDoc",
"handle": -1,
"params": [
#Can iterate if multiple apps are there
#Since only one app was present we used the index 0
result_json['result']['qDocList'][0]['qDocId']
],
"outKey": -1,
"id": 2
}
#The first call seems to be for establishing the connection and second to actually send the request body
ws.send(json.dumps(app_req))
result = ws.recv()
ws.send(json.dumps(app_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()
app_req_handle = result_json['result']['qReturn']['qHandle']
#For creating the session object necessary for fetching dimensions, fields, etc.
session_req = {
"jsonrpc": "2.0",
"method": "CreateSessionObject",
"handle": app_req_handle,
"params": [
{
"qInfo": {
"qType": "SheetList"
},
"qAppObjectListDef": {
"qType": "sheet",
"qData": {
"title": "/qMetaDef/title",
"description": "/qMetaDef/description",
"thumbnail": "/thumbnail",
"cells": "/cells",
"rank": "/rank",
"columns": "/columns",
"rows": "/rows"
}
}
}
],
"outKey": -1,
"id": 3
}
ws.send(json.dumps(session_req))
result = ws.recv()
ws.send(json.dumps(session_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()
session_req_handle = result_json['result']['qReturn']['qHandle']
#For fetching the layout of the sheets
layout_req = {
"jsonrpc": "2.0",
"method": "GetLayout",
"handle": session_req_handle,
"params": [],
"outKey": -1,
"id": 4
}
ws.send(json.dumps(layout_req))
result = ws.recv()
ws.send(json.dumps(layout_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()
#Since only one sheet was present we used the index 0
list_of_charts = result_json['result']['qLayout']['qAppObjectList']['qItems'][0]['qData']['cells']
for chart in list_of_charts:
print(chart['name'])
print()
ws.close()
我已经探索了 Qlik 社区以及 SO 和 ExportData 上的很多页面,但我无法为其编写正确的 JSON 请求。作为参考,我在终端中执行 python 脚本时得到的输出如下所示。我对此很陌生,我会非常感谢你们所有人的帮助。
{'jsonrpc': '2.0', 'id': 1, 'result': {'qDocList': [{'qDocName': 'Test_2.qvf', 'qConnectedUsers': 0, 'qFileTime': 44188.190983796296 , 'qFileSize': 851968, 'qDocId': 'C:\Users\mohdm\Documents\Qlik\Sense\Apps\Test_2.qvf', 'qMeta': {'hassectionaccess': False, 'encrypted': False}, 'qLastReloadTime': '2020-12-22T19:12:22.245Z', 'qTitle': 'Test_2', 'qThumbnail': {}}]}}
{'jsonrpc': '2.0', 'id': 2, 'result': {'qReturn': {'qType': 'Doc', 'qHandle': 1, 'qGenericId': 'C:\Users\mohdm\Documents\Qlik\Sense\Apps\ Test_2.qvf'}}, 'change': 1}
{'jsonrpc': '2.0', 'id': 3, 'result': {'qReturn': {'qType': 'GenericObject','qHandle':2,'qGenericType':'SheetList','qGenericId':'4b344780-a350-48db-8b65-27bb5a2c62b2'}},'change':1}
{'jsonrpc': '2.0', 'id': 4, 'result': {'qLayout': {'qInfo': {'qId': '4b344780-a350-48db-8b65-27bb5a2c62b2', 'qType': 'SheetList'}, 'qMeta': {'privileges': ['read', 'update', 'delete', 'exportdata']}, 'qSelectionInfo': {}, 'qAppObje ctList': {'qItems': [{'qInfo': {'qId': '8a0f6a01-ef89-4d65-821f-371c26208dcf', 'qType': 'sheet'}, 'qMeta': {'privileges': [ 'read', 'update', 'delete', 'exportdata'], 'title': 'Sheet_1', 'description': ''}, 'qData': {'rank': None, 'thumbnail': {' qStaticContentUrl': {}}, 'columns': 24, 'rows': 12, 'cells': [{'name': 'kfxNpV', 'type': 'auto-chart', 'col': 0, ' row':0,'colspan':15,'rowspan':6,'bounds':{'y':0,'x':0,'width':62.5,'height':50}},{' name': 'qHzmARQ', 'type': 'qlik-barplus-chart', 'col': 0, 'row': 6, 'colspan': 21, 'rowspan': 6, 'bounds': {'y ': 50, 'x': 0, 'width': 87.5, 'height': 50}}, {'name': 'BXBQmw', 'type': 'auto-chart', 'col': 15, ' row':0,'colspan':9,'rowspan':6,'bounds':{'y':0,'x':62.5,'width':37.5,'height':50}}],'标题': 'Sheet_1', 'description': ''}}]}}}}
kfxNpV
qHzmARQ
BXBQmw
我最初也在Qlik community 发布了这个问题,但没有得到回复。
【问题讨论】:
标签: javascript python json websocket qliksense