通过RESTful API通过python发布与MOXA ioLogik1214的接口，以便将数据PUT到DO端口

Question

我正在尝试编写一个PUT数据(RESTful API(，以将MOXA ioLogik1214设备的数字输出通道设置为1。

我尝试了配置为diCounter通道的数字输入DI-00，并且能够读取&写入此频道。

然而，当我试图写入DO-00，配置为正常输出通道时，我遇到了：

"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。欢迎提出任何建议！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

刚刚挖了同一个洞，发现Moxa E1214有继电器形式的数字输出。(DO！=继电器(。

因此url应该是：

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

和用于控制的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，头值需要是字节或字符串(我认为请求lib要求(。

希望能有所帮助。