python - 通过 RESTful API 使用 python 与 MOXA ioLogik1214 进行连接，以将数据放入 DO 端口

Question

我正在尝试编写 PUT 数据(RESTful API)以将 MOXA ioLogik1214 设备的数字输出 channel 设置为 1。

我尝试将数字输入 DI-00 配置为 diCounter channel ，并且能够读取和写入该 channel 。

但是，当我尝试写入 DO-00，配置为正常输出 channel 时，我遇到了:

“发生 HTTP 错误:404 客户端错误:未找到”(如 ## 注释所示)。

我已检查 DO-00 是读/写数字输出 channel 。任何建议表示赞赏!谢谢!

我的python代码如下:

def getData(url, headers):
    try:
        response = requests.get(url, headers=headers)

        # If the response was successful, no Exception will be raised.
        response.raise_for_status()
    except HTTPError as http_err:
        print("HTTP error occurred: %s" % http_err)
        if (response.status_code == 400):
            if len(response.text) > 0:
                print("response.text:\n%s" % response.text)
    except Exception as err:
        print("Other error occurred: %s" % err)
    else:
        if len(response.text) > 0:
                print("response.text:\n%s" % response.text)
        else:
            print("Success!")

    # Print empty line.
    print


def putData(url, headers, data):
    try:
        response = requests.put(url, headers=headers, data=data)

        # If the response was successful, no Exception will be raised.
        response.raise_for_status()
    except HTTPError as http_err:
        print("HTTP error occurred: %s" % http_err)
        if (response.status_code == 400):
            if len(response.text) > 0:
                print("response.text:\n%s" % response.text)
    except Exception as err:
        print("Other error occurred: %s" % err)
    else:
        if len(response.text) > 0:
                print("response.text:\n%s" % response.text)
        else:
            print("Success!")

    # Print empty line.
    print


if __name__ == '__main__':
    # Prepare Digital Output URL.
    do00Status_URL =  "http://"+MOXA_IP+"/api/slot/0/io/do/0/doStatus"

    # Prepare GET headers.
    getHeaders = {'Content-Type': 'application/json', 'Accept': 'vdn.dac.v1'}

    # Use GET method to get DO-00 Status.
    print("1) GET DigitalOutput00_Status response...")
    getData(do00Status_URL, getHeaders)
    ## Result => HTTP error occurred: 404 Client Error: Not found

    # Prepare DO-00_ON data.
    do00Status_ON = '{"slot":0,"io":{"do":{"0":{"doStatus":1}}}}'

    # Prepare DO-00_OFF data.
    do00Status_OFF = '{"slot":0,"io":{"do":{"0":{"doStatus":0}}}}'

    # Prepare PUT headers.
    putHeaders_do00Status = getHeaders.copy()
    putHeaders_do00Status['Content-Length'] = len(json.dumps(do00Status_OFF))  # do00Status_ON/OFF is the same length.

    # PUT Counter data & print result.
    print("2a) PUT DO-00_ON response...")
    putData(do00Status_URL, putHeaders_do00Status, do00Status_ON)
    ## Result => HTTP error occurred: 404 Client Error: Not found

    # GET DO-00_Status Info data & print them.
    print("2b) GET DO-00_Status response...")
    getData(do00Status_URL, getHeaders)
    ## Result => HTTP error occurred: 404 Client Error: Not found

    time.sleep(3);

    # PUT Counter data & print result.
    print("2c) PUT DO-00_OFF response...")
    putData(do00Status_URL, putHeaders_do00Status, do00Status_OFF)
    ## Result => HTTP error occurred: 404 Client Error: Not found

    # GET DO-00_Status Info data & print them.
    print("2d) GET DO-00_Status response...")
    getData(do00Status_URL, getHeaders)
    ## Result => HTTP error occurred: 404 Client Error: Not found

Answer 1

刚刚挖了同样的洞，发现Moxa E1214有继电器形式的数字输出。 (DO!= 中继)。

因此网址应该是:

   "http://"+MOXA_IP+"/api/slot/0/io/relay/0/relayStatus".

和控制的jsons不同:

    # Prepare DO-00_ON data.
    do00Status_ON = '{"slot":"0","io":{"relay":{"0":{"relayStatus":"0"}}}}'

    # Prepare DO-00_OFF data.
    do00Status_OFF = '{"slot":"0","io":{"relay":{"0":{"relayStatus":"1"}}}}'

第三件事是行:

   putHeaders_do00Status['Content-Length'] = len(json.dumps(do00Status_OFF))

一个有效的:

   putHeaders_do00Status['Content-Length'] = str(len(do00Status_OFF))

do00Status_OFF 是字符串，不需要转储字符串的 json，并且 header 值需要是字节或字符串(我认为请求 lib 要求)。

希望有帮助。