如何使用 python 阅读 API 的下一页？

Question

我需要有关如何执行循环的帮助，因此每次我发出 GET 请求时，它始终是来自 API 的新页面。

我从获得第一个响应开始。它包含一个参数到下一页next_key

{
  "result": [
    {
      ...,
      ...
    }
  ],
  "next_key": 123
 }

以下是我目前的尝试

import requests
import json

url = "https://flespi.io/gw/channels/all/messages"
headers = {"Authorization": "FlespiToken 23ggh45"}

def getFirst():
    data = {"limit_count":100, "limit_size":10000}
    params = {"data":json.dumps(data, separators=(",", ":"))}

    reqFirst = requests.get(url, params=params, headers=headers).json()
    return reqFirst["next_key"] ## this returns "123"

def getDataNext():
    data = {"limit_count":100, "limit_size":10000, "curr_key":getFirst()}
    params = {"data":json.dumps(data, separators=(",", ":"))}

    reqNext = requests.get(url, params=params, headers=headers)

    jsonData = reqNext.json()

    while True:
        if "next_key" in jsonData:
            data = {"limit_count":100, "limit_size":10000,"curr_key":jsonData["next_key"]}
            params = {"data":json.dumps(data, separators=(",", ":"))}

            req = requests.get(url, params=params, headers=headers).json()  ## this should do GET request for the third page and so on...

            print req["next_key"] # this returns "3321" which is the value for "next_key" in second page

        else:
            pass

getDataNext()

包括limit count、limit size和curr key的完整url如下https://flespi.io/gw/channels/all/messages?data=%7B%22curr_key%22%123%2C%22limit_count%22%3A100%2C%22limit_size%22%3A10000%7D

如您所见，这只返回第二页 jsonData["next_key"]。我想做的是，对于每个 GET 请求，程序都会读取 next_key 并将其放在下一个 GET 请求中。

我正在考虑在curr_key 上使用增量，但密钥是随机的，而且我不知道有多少页。

我相信必须有一个简单的解决方案，但显然我无法考虑。感谢您的帮助和建议。

Answer 1

试试这个

has_next_key = False
nextKey = ""

if "next_key" in jsonData:
    has_next_key = True
    nextKey = jsonData["next_key"]

while has_next_key:
    data = {"limit_count":100, "limit_size":10000,"curr_key":nextKey}
    params = {"data":json.dumps(data, separators=(",", ":"))}

    req = requests.get(url, params=params, headers=headers).json()  ## this should do GET request for the third page and so on...
    if "next_key" in req:
        nextKey = req["next_key"]
        print nextKey # this returns "3321" which is the value for "next_key" in second page
    else:
        has_next_key = False
        # no next_key, stop the loop