问题：通过RESTful API使用python与MOXA ioLogik1214进行接口，以将数据放入DO端口

我正在尝试编写一个PUT数据（RESTful API），为MOXA ioLogik1214设备将数字输出通道设置为1

我尝试了配置为双计数器通道的数字输入DI-00，并且能够读取和写入该通道

但是，当我尝试写入DO-00时，配置为正常输出通道，我遇到：

“发生HTTP错误：404客户端错误：未找到”（如##注释中所示）

我已检查DO-00是否为读/写数字输出通道。任何建议都将不胜感激！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

---

只是挖了同一个洞，发现艾条E1214有继电器形式的数字输出。（DO！=继电器）

因此，url应为：

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

用于控制的JSON和JSON是不同的：

    # 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"}}}}'

第三件事是线：

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

一种有效的方法：

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

do00Status_OFF是string，不需要转储字符串的json，头值需要是byte或string（我认为请求lib需求）

希望能有帮助