python - requests提交的json.dumps不能被服务器解析

Question

背景：
现有一看上去是内嵌IE应用程序A，可以做一些查询等操作。

目的：
通过借助Wireshark对应用程A的通信过程分析，借助python的requests的库自行构造一个自己能掌控的程序B

状况：
在使用requests库，加载json格式的POST数据，执行特定请求时，遇到对方服务器的报错。

payload_data={"jsonstr":{
"pagesize":10,
"pageindex":1,
"start":"2017-03-01",
"end":"2017-03-13",
"keyword":"张三",
"status":"0"
}
}

r = requests.post(url, headers = headers_comm, data = json.dumps(payload_data))

Wireshark对程序A请求的侦听：

自行构造请求时的报错信息：

猜测这个请求的构造基本成功了，但对端应用程序解析我POST的数据时不能正常识别。
尝试过给json.dumps加, ensure_ascii=False的参数，但报错依旧。
如果这个猜测正确的话，POST数据应该怎样正确dumps？
如果这个猜测不正确，那么可能是哪里的原因？

Answer 1

Data does not require json.dump. You only need to use json.dump to include the following jsonstr in data. It should be like this, you can try it

Answer 2

Response Code It’s 500. It’s because the other party made an error during deserialization.
According to the exception information, the server should deserialize in the following way.

C#:

var jsonObj = (new JavaScriptSerializer()).Deserialize<IDictionary<string, string>>(jsonString);
            

Your payload_data format is wrong, it is a nested dictionary.

Change payload_data to:
Python:

payload_data={
"pagesize":10,
"pageindex":1,
"start":"2017-03-01",
"end":"2017-03-13",
"keyword":"张三",
"status":"0"
}

That’s it.