ServiceNow REST API Integration: No JSON object could be decoded - python

I tried do some integration towards serviceNow records using python script and referring example given in this link to update the records using Http Request Patch method: Table API Python
Here is my code:
#Need to install requests package for python
#sudo easy_install requests
import requests
# Set the request parameters
url = 'https://instance.owndomain.com/api/now/table/sc_req_item/2a2851fe88709010b9120e9b506dd9a9'
user = 'username'
pwd = 'password'
# Set proper headers
headers = {"Content-Type":"application/json","Accept":"application/json"}
# Do the HTTP request
response = requests.patch(url, auth=(user, pwd), headers=headers ,data='{"u_switch_status_automation":"In Processing using Python", "u_switch_description":"The Automation currently processing this SR using Python"}')
# Check for HTTP codes other than 200
if response.status_code != 200:
print('Status:', response.status_code, 'Headers:', response.headers, 'Error Response:',response.json())
exit()
# Decode the JSON response into a dictionary and use the data
print('Status:',response.status_code,'Headers:',response.headers,'Response:',response.json())
And the result I got is as follows:
/usr/lib/python2.7/site-packages/urllib3/connectionpool.py:1004: InsecureRequestWarning: Unverified HTTPS request is being made to host 'instance.owndomain.com'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecureRequestWarning,
Traceback (most recent call last):
File "/home/automation/switchConf/updateRecord.py", line 18, in <module>
print('Status:', response.status_code, 'Headers:', response.headers, 'Error Response:',response.json())
File "/usr/lib/python2.7/site-packages/requests/models.py", line 898, in json
return complexjson.loads(self.text, **kwargs)
File "/usr/lib64/python2.7/json/__init__.py", line 338, in loads
return _default_decoder.decode(s)
File "/usr/lib64/python2.7/json/decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib64/python2.7/json/decoder.py", line 384, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

Related

github actions repository dispatch "message": "Problems parsing JSON"

I am trying to create an actions workflow that can be triggered from an external event. Upon researching, found out I can do it through repository_dispatch.
I need to trigger the actions through python but I get this error and status code 400:
{'message': 'Problems parsing JSON', 'documentation_url':
'https://docs.github.com/rest/reference/repos#create-a-repository-dispatch-event'}
I then serialized the payload dictionary to string with json.dumps() and the error changed to with code 422:
{'message': 'Invalid request.\n\nFor 'links/0/schema',
"{"event_type": "test", "client_payload": {"unit": false,
"integration": true}}" is not an object.', 'documentation_url':
'https://docs.github.com/rest/reference/repos#create-a-repository-dispatch-event'}
Here's my code snippet that I constructer from the curl example provided in the docs
import requests
import json
url = "https://api.github.com/repos/larwindcunha/<repo>/dispatches"
payload = {"event_type": "test", "client_payload": {"unit":False,"integration":True}}
header = {"Accept": "application/vnd.github+json", "Authorization": "token <my_token>"}
payload = json.dumps(payload)
resp = requests.post(url=url, headers=header, json=payload)
When I try running the curl command provided here - https://docs.github.com/en/rest/repos/repos#create-a-repository-dispatch-event, I get the same error with code 400:
{'message': 'Problems parsing JSON', 'documentation_url':
'https://docs.github.com/rest/reference/repos#create-a-repository-dispatch-event'}
curl \
-X POST \
-H "Accept: application/vnd.github+json" \
-H "Authorization: token <MY_TOKEN_HERE>" \
https://api.github.com/repos/OWNER/REPO/dispatches \
-d '{"event_type":"on-demand-test","client_payload":{"unit":false,"integration":true}}'
Does you guys know if I'm doing something wrong here? Or is repository dispatch broken? Any help would be appreciated.
Another user helped me with this answer -
payload = json.dumps(payload)
resp = requests.post(url=url, headers=header, json=payload)
json.dumps() expects a Python data structure, serializes that as JSON,
and returns it as a string. The json parameter for requests.post()
expects a Python data structure, serializes that as JSON, and sends it
as the post body. Seems familiar? The result is that you get JSON for
a string that contains JSON.
Remove the payload = json.dumps(payload) line and it should work.
I was trying to print(resp.json()) since I was getting a json response on error, but on successful post request, there was no response, and just got an JSON decoder error. This misled me as I assumed that some json data would be sent back in the response for positive case as it was for a negative one. Later when I checked my actions log, it was being triggered.
Traceback (most recent call last): File
"C:\Users\dcunh\Documents\Code\Test\env_test\lib\site-packages\requests\models.py",
line 971, in json
return complexjson.loads(self.text, **kwargs) File "C:\Users\dcunh\AppData\Local\Programs\Python\Python39\lib\json_init_.py",
line 346, in loads
return _default_decoder.decode(s) File "C:\Users\dcunh\AppData\Local\Programs\Python\Python39\lib\json\decoder.py",
line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "C:\Users\dcunh\AppData\Local\Programs\Python\Python39\lib\json\decoder.py",
line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char
0)
During handling of the above exception, another exception occurred:
Traceback (most recent call last): File
"C:\Users\dcunh\Documents\Code\Test\test.py", line 10, in
print(resp.json()) File "C:\Users\dcunh\Documents\Code\Test\env_test\lib\site-packages\requests\models.py",
line 975, in json
raise RequestsJSONDecodeError(e.msg, e.doc, e.pos) requests.exceptions.JSONDecodeError: Expecting value: line 1 column 1
(char 0)
You cannot literally offer
-H "Authorization: token <TOKEN>" \
as an element of your POST request.
The documentation is inviting you
to signup and request a personal token,
and then insert its value into that <TOKEN> placeholder.
It's a bit like seeing a form letter
that starts Dear <insert-your-name-here>: --
we anticipate that a sensible value will be substituted for the placeholder.

How to capture the response based on the Content-Type sent by the server using requests in Python?

I am pretty new to python and learning how to make HTTP request and store the response in a variable.
Below is the similar kind of code snippet that I am trying to make the POST request.
import requests
import simplejson as json
api_url = https://jsonplaceholder.typicode.com/tickets
raw_body = {"searchBy":"city","searchValue":"1","processed":9,"size":47,"filter":{"cityCode":["BA","KE","BE"],"tickets":["BLUE"]}}
raw_header = {"X-Ticket-id": "1234567", "X-Ticket-TimeStamp": "11:01:1212", "X-Ticket-MessageId": "123", 'Content-Type': 'application/json'}
result = requests.post(api_url, headers=json.loads(raw_header), data=raw_body)
#Response Header
response_header_contentType = result.headers['Content-Type'] #---> I am getting response_header_contentType as "text/html; charset=utf-8"
#Trying to get the result in json format
response = result.json() # --> I am getting error at this line. May be because the server is sending the content type as "text/html" and I am trying to capture the json response.
Error in console :
Traceback (most recent call last):
File "C:\sam\python-project\v4\makeApiRequest.py", line 45, in make_API_request
response = result.json()
File "C:\Users\userName\AppData\Local\Programs\Python\Python37\lib\site-packages\requests\models.py", line 898, in json
return complexjson.loads(self.text, **kwargs)
File "C:\Users\userName\AppData\Local\Programs\Python\Python37\lib\site-packages\simplejson\__init__.py", line 525, in loads
return _default_decoder.decode(s)
File "C:\Users\userName\AppData\Local\Programs\Python\Python37\lib\site-packages\simplejson\decoder.py", line 370, in decode
obj, end = self.raw_decode(s)
File "C:\Users\userName\AppData\Local\Programs\Python\Python37\lib\site-packages\simplejson\decoder.py", line 400, in raw_decode
return self.scan_once(s, idx=_w(s, idx).end())
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
So, how can I store the response in a variable based on the content-type sent by the server using requests.
Can somebody please help me here. I tried googling too but did not find any helpful documentation on how to capture the response based on the content-type.
as you already said your contentType is 'text/html' not 'application/json' that normally means that it can not be decoded as json.
If you look at the documentation
https://2.python-requests.org/en/master/user/quickstart/#response-content you can find that there are different ways to decode the body, if you already know you have 'text/html' it makes sense to decode it with response.text.
Hence it makes sense to distinquish based on the content type how to decode your data:
if result.headers['Content-Type'] == 'application/json':
data = result.json()
elif result.headers['Content-Type'] == 'text/html':
data = result.text
else:
data = result.raw

"HTTP Error 401: Unauthorized" when querying youtube api for playlist with python

I try to write a simple python3 script that gets some playlist informations via the youtube API. However I always get a 401 Error whereas it works perfectly when I enter the request string in a browser or making a request with w-get. I'm relatively new to python and I guess I'm missing some important point here.
This is my script. Of course I actually use a real API-Key.
from urllib.request import Request, urlopen
from urllib.parse import urlencode
api_key = "myApiKey"
playlist_id = input('Enter playlist id: ')
output_file = input('Enter name of output file (default is playlist id')
if output_file == '':
output_file = playlist_id
url = 'https://www.googleapis.com/youtube/v3/playlistItems'
params = {'part': 'snippet',
'playlistId': playlist_id,
'key': api_key,
'fields': 'items/snippet(title,description,position,resourceId/videoId),nextPageToken,pageInfo/totalResults',
'maxResults': 50,
'pageToken': '', }
data = urlencode(params)
request = Request(url, data.encode('utf-8'))
response = urlopen(request)
content = response.read()
print(content)
Unfortunately it rises a error at response = urlopen(request)
Traceback (most recent call last):
File "gpd-helper.py", line 35, in <module>
response = urlopen(request)
File "/usr/lib/python3.4/urllib/request.py", line 153, in urlopen
return opener.open(url, data, timeout)
File "/usr/lib/python3.4/urllib/request.py", line 461, in open
response = meth(req, response)
File "/usr/lib/python3.4/urllib/request.py", line 571, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python3.4/urllib/request.py", line 499, in error
return self._call_chain(*args)
File "/usr/lib/python3.4/urllib/request.py", line 433, in _call_chain
result = func(*args)
File "/usr/lib/python3.4/urllib/request.py", line 579, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 401: Unauthorized
I looked up the documentation but couldn't find any hint. According to the docs other authentication than the api key is not required for listing a public playlist.
After diving deeper into the docs of python and google I found the solution to my problem.
Pythons Request object automatically creates a POST request when the data parameter is given but the youtube api expects GET (with post params)
The Solution is to ether supply the GET argument for the method parameter in python 3.4
request = Request(url, data.encode('utf-8'), method='GET')
or concatenate the url with the urlencoded post data
request = Request(url + '?' + data)

Transcribing sound files to text in python and google speech api

I have a bunch of files in wav. I made a simple script to convert them to flac so I can use it with the google speech api. Here is the python code:
import urllib2
url = "https://www.google.com/speech-api/v1/recognize?client=chromium&lang=en-US"
audio = open('somefile.flac','rb').read()
headers={'Content-Type': 'audio/x-flac; rate=16000', 'User-Agent':'Mozilla/5.0'}
request = urllib2.Request(url, data=audio, headers=headers)
response = urllib2.urlopen(request)
print response.read()
However I am getting this error:
Traceback (most recent call last):
File "transcribe.py", line 7, in <module>
response = urllib2.urlopen(request)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 392, in open
response = self._open(req, data)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 410, in _open
'_open', req)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 370, in _call_chain
result = func(*args)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1194, in https_open
return self.do_open(httplib.HTTPSConnection, req)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1161, in do_open
raise URLError(err)
urllib2.URLError: <urlopen error [Errno 32] Broken pipe>
I thought at first that it was because the file is too big. But I recorded myself for 5 seconds and it still does the same.
I dont think google ha released the api yet so it's hard to understand why its failing.
Is there any other good speech-to-text api out there that can be used in either Python or Node?
----- Editing for my attempt with requests:
import json
import requests
url = 'https://www.google.com/speech-api/v1/recognize?client=chromium&lang=en-US'
data = {'file': open('file.flac', 'rb')}
headers = {'Content-Type': 'audio/x-flac; rate=16000', 'User-Agent':'Mozilla/5.0'}
r = requests.post(url, data=data, headers=headers)
# r = requests.post(url, files=data, headers=headers) ## does not work either
# r = requests.post(url, data=open('file.flac', 'rb').read(), headers=headers) ## does not work either
print r.text
Produced the same problem as above.
The API Accepts HTTP POST requests. You're using a HTTP GET Request here. This can be confirmed by loading the URI in your code directly into a browser:
HTTP method GET is not supported by this URL
Error 405
Also, i'd recommend using the requests python library. See http://www.python-requests.org/en/latest/user/quickstart/#post-a-multipart-encoded-file
Lastly, it seems that the API only accepts segments up to 15 seconds long. Perhaps your error is the file is too large? If you can upload an example flac file, perhaps we could diagnose further.

ValueError: No JSON object could be decoded, but positive <Response [200]>

I'm going over some URL's and I can fetch most of the data I can from an API I'm using. *Imgur API. However when it finds an image that has been posted before but was eventually removed it still shows a positive URL get response (code 200), and when I use
j1 = json.loads(r_positive.text)
I get this error:
http://imgur.com/gallery/cJPSzbu.json
<Response [200]>
Traceback (most recent call last):
File "image_poller_multiple.py", line 61, in <module>
j1 = json.loads(r_positive.text)
File "/usr/lib/python2.7/json/__init__.py", line 326, in loads
return _default_decoder.decode(s)
File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python2.7/json/decoder.py", line 384, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded
How can I "fetch" the error inside the j1 variable instead? I'd like to use a conditional structure to solve the problem and avoid my program from crashing. Something like
if j1 == ValueError:
continue
else:
do_next_procedures()
You need to use try except instead:
try:
j1 = json.loads(r_positive.text)
except ValueError:
# decoding failed
continue
else:
do_next_procedures()
See Handling Exceptions in the Python tutorial.
What really happens is that you were redirected for that URL and you got the image page instead. If you are using requests to fetch the JSON, look at the response history instead:
if r_positive.history:
# more than one request, we were redirected:
continue
else:
j1 = r_positive.json()
or you could even disallow redirections:
r = requests.post(url, allow_redirects=False)
if r.status == 200:
j1 = r.json()
The URL you listed redirects you to a HTML page. (Use curl to check things like this, he's your friend.)
The HTML page obviously cannot be parsed as JSON.
What you probably need is this:
response = fetch_the_url(url)
if response.status == 200:
try:
j1 = json.loads(response.text)
except ValueError:
# json can't be parsed
continue

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