RobotFramework_Python_API: 对于POST请求出现“异常”： “com.fasterxml.jackson.core.JsonParseException”

Question

我正在尝试在Pycharm中使用Python的RobotFramework发送一个Post请求。每次执行时，我都会遇到一个“异常”：

com.fasterxml.jackson.core.JsonParseException。

正在执行的代码

TC2: Testing_createDict
    ${auth}=    Create List     Bxxxxxx     xxxxxxxxxxxx
    Create Session    mysession    ${base_url}  auth=${auth}
    ${entry}=   Create Dictionary   Lot Status Code=C   Item Number=95544403  Lot Expiration Date=09222021    Branch Plant=QIO    Lot Description=BSIC-2022-001   Lot Number=185
    ${lot master}=  Create List     ${entry}
    ${body}=    Create Dictionary   Item Lot Check (Y/N)=N      Lot Master=${lot master}
    ${header}=  Create Dictionary   Content-Type=application/json
    ${response}=    POST On Session    mysession    /jderest/orchestrator/58_XXXXX_XXXX_ORCH  data=${body}    headers=${header}
    Log To Console    ${response.status_code}

输出结果：

[info (+0.25s)] POST Request : url=https://xxxxx//xxx
 headers={'User-Agent': 'python-requests/2.28.1', 'Accept-Encoding': 'gzip, deflate', 'Accept': '*/*', 'Connection': 'keep-alive', 'Content-Type': 'application/json', 'Content-Length': '182', 'Authorization': 'Basic xxxxxxxxxxxx'} 
 body=Item+Lot+Check+%28Y%2FN%29=N&Lot+Master=Lot+Status+Code&Lot+Master=Item+Number&Lot+Master=Lot+Expiration+Date&Lot+Master=Branch+Plant&Lot+Master=Lot+Description&Lot+Master=Lot+Number 
 
[info] POST Response : url=https://xxxxxxxxx
 status=500, reason=Internal Server Error 
 headers={'Date': 'Wed, 06 Mar 2024 15:09:46 GMT', 'Content-Type': 'application/json; charset=UTF-8', 'Content-Length': '425', 'Connection': 'keep-alive', 'Set-Cookie': 'XXXXX; Expires=Wed, 13 Mar 2024 15:09:46 GMT; Path=/, AWSALBCORS=XXXXXXXXX; Expires=Wed, 13 Mar 2024 15:09:46 GMT; Path=/; SameSite=None; Secure', 'X-ORACLE-DMS-ECID': 'xxx--xx-xxxx-xxxxx', 'X-ORACLE-DMS-RID': '0', 'Access-Control-Allow-Methods': 'GET, POST, OPTIONS', 'Access-Control-Allow-Origin': '*'} 
 body={
  "message" : "Unrecognized token 'Item': was expecting 'null', 'true', 'false' or NaN\n at [Source: (String)\"Item+Lot+Check+%28Y%2FN%29=N&Lot+Master=Lot+Status+Code&Lot+Master=Item+Number&Lot+Master=Lot+Expiration+Date&Lot+Master=Branch+Plant&Lot+Master=Lot+Description&Lot+Master=Lot+Number\"; line: 1, column: 5]",
  "exception" : "com.fasterxml.jackson.core.JsonParseException",
  "timeStamp" : "2024-03-06:23.09.46"
} 

Answer 1

根据请求库的文档，这里有个链接：https://requests.readthedocs.io/en/latest/user/quickstart/#more-complicated-post-requests

如果你需要设置那个头信息，并且不想自己去编码字典，你可以直接使用 json 参数（这个功能在 2.4.2 版本中加入），这样它会自动编码：

这里提到的是设置内容类型的头信息 并且 将字典编码成 json 格式。

在你的示例代码中，你传递的是纯字典 而没有 将其编码成 json，也没有手动设置内容类型。这很可能导致实际发送的数据使用了单引号，而远程解析器会因为 json 标准要求使用双引号而失败。

所以，你的代码

${response}=    POST On Session    mysession    /jderest/orchestrator/58_XXXXX_XXXX_ORCH  data=${body}    headers=${header}

应该改成：

${response}=    POST On Session    mysession    /jderest/orchestrator/58_XXXXX_XXXX_ORCH  json=${body}

或者

${encoded_body}  Evaluate  json.dumps(${body})  modules=json
${response}=    POST On Session    mysession    /jderest/orchestrator/58_XXXXX_XXXX_ORCH  data=${body}    headers=${header}