I'm using node-rest-client library to call my rest API running a python flask app in a test server. The Node setup and request code is below.
If I add a user token to the request header it words fine, but in the call to obtain the user token using basic auth my python system is successfully authenticating and returning the token with a 200 status, but the flask server is then changing this to a 400 Bad Request. It works fine making the call using Postman.
Is there something missing from my two config objects for node-rest-client?
Cheers.
var options_auth = {
user: "bob",
password: "password",
mimetypes: {
json: ["application/json", "application/json;charset=utf-8"]
}
};
var Client = require('node-rest-client').Client;
var client = new Client(options_auth);
var method = "/authtoken";
var args = {
headers: {
"Content-Type": "application/json",
"api-key": "asf89a7assa98d7sd98d98ds",
//"token": "dsf98s7dsf98dsf7sd98f7dsf",
"Accept": "application/json"
},
responseConfig: {
timeout: 1000 //response timeout
}
};
client.get(Api.url+method, args, function (data, response) {
// parsed response body as js object
// raw response
//console.log(response);
if(Buffer.isBuffer(data)){
data = data.toString('utf8');
}
console.log(data);
var stringData = data.toString('utf8');
console.log("String data = "+stringData);
}).on('error', function (err) {
console.error('Something went wrong with the http client', err);
});
Also, spotted these differences between the request headers received by the server:
// Node Request fails: 400
'headers': EnvironHeaders([
('Authorization', u'Basic XXXXXXXXXXXXXX=='),
('Vga-Api-Key', u'xxxxxxxxxxxxxxxxxxxxxxxx'),
('Content-Length', u'0'),
('Connection', u'close'),
('Host', u'127.0.0.1:8080'),
('Accept', u'*/*'),
('Content-Type', u'application/json')]),
// Postman Request works: 200
'headers': EnvironHeaders([
('Authorization', u'Basic XXXXXXXXXXXXXX=='),
('Vga-Api-Key', u'xxxxxxxxxxxxxxxxxxxxxxxx'),
* ('Content-Length', u''),
* ('Connection', u'keep-alive'),
('Host', u'127.0.0.1:8080'),
* ('Cache-Control', u'no-cache'),
('Accept', u'*/*'),
('Content-Type', u''),
* ('Accept-Encoding', u'gzip, deflate')]),
The problem is your setting of the header Content-Type: application/json and the probable calling in the server of request.get_json() directly, or indirectly via the (deprecated) request.json property.
When get_json() is called Flask will check to see that a JSON payload has been sent in the body of the request and then parse it if present. That's OK if the request actually contains JSON in the body, but, being a GET request, yours doesn't. In this case, its JSON expectation being unfulfilled, the server raises a BadRequest error and returns a HTTP 400 error response.
From what you've shown your request doesn't need to be JSON because the authorisation username and password are passed in the Authorization: Basic xxxxxxxx header.
The easiest and best way to fix the problem is to simply omit the content type header.
Alternatively you can tell Flask not to complain if there is no JSON data to parse by passing silent=True to get_json, but this just papers over the problem and is not a good idea.
Related
I am trying to make a POST request for Indexnow protocol, which allows the user to send link massive to search engine (BING) for instant indexing. As I read all documentation, I found that this protocol suggests such JSON request construction:
POST /indexnow HTTP/1.1
Content-Type: application/json; charset=utf-8
Host: <searchengine>
{
"host": "www.example.com",
"key": "265f7fb3bd6c41118f6bf05568d9c825",
"urlList": [
"https://www.example.com/url1",
"https://www.example.com/folder/url2",
"https://www.example.com/url3"
]
}
I chose to use Python, and here is my code for this POST request:
import advertools as adv
import pandas as pd
import requests
import json
import time
def submit_url_set(set_:list, key, location, host="https://www.bing.com", headers={"Content-type":"application/json", "charset":"utf-8"}):
key = "91ca7c564b334f38b0b1ed90eec8g8b2"
data = {
"host": "www.bing.com",
"key": key,
"keyLocation": "https://uchet.kz/91ca7c564b334f38b0b1ed90eec8g8b2.txt",
"urlList": [
'https://uchet.kz/news/formirovanie-obshchestva-chistogo-ot-korruptsii-dobivaetsya-tokaev/',
'https://uchet.kz/news/pravila-polucheniya-iin-inostrantsu-v-rk-izmeneny/',
'https://uchet.kz/news/zabolevaemost-koronavirusom-sredi-shkolnikov-vyrosla-v-13-raza/',
'https://uchet.kz/news/izmeneny-pravila-provedeniya-tamozhennoy-ekspertizy/'
]
}
r = requests.post(host, data=data, headers=headers)
return r.status_code
After script runs, nothing returns.
I expected the script to return server response code HTTP-code 200 OK
What was I really expected
Getting the server response code for each indexing url.
I am the author of the code.
IndexNow API doesn't return a response, if you don't take an error message it means that the request has been taken.
You can check your log files to validate that.
Also, https://www.searchenginejournal.com/indexnow-api-python/429726/ in the article, this is stated.
Go to the Post Requests Online
Type your search engine URL
Put your code in the window below in this format:
{
"host": "your_site",
"key": "your_key",
"urlList": [
"https://your_site/1",
"https://your_site/2",
"https://your_site/3"
]
}
Press SEND.
Done
SCREENSHOT
here is the line of code returning the error message from flask api
return jsonify(message='wrong username or password'),400
reading it from here in react js
axios
.post("http://127.0.0.1:5000/authentication/login", body)
.then((res) => {
console.log(res)
})
.catch((error) => {
console.log(error);
});
and this is what i see in the console
{"message":"Request failed with status code 400","name":"Error","stack":"Error: Request failed with status code 400\n at createError (http://localhost:3000/static/js/1.chunk.js:854:15)\n at settle (http://localhost:3000/static/js/1.chunk.js:1075:12)\n at XMLHttpRequest.handleLoad (http://localhost:3000/static/js/1.chunk.js:329:7)","config":{"url":"http://127.0.0.1:5000/auth/login","method":"post","data":"{\"phone\":\"\",\"password\":\"\"}","headers":{"Accept":"application/json, text/plain, */*","Content-Type":"application/json"},"transformRequest":[null],"transformResponse":[null],"timeout":0,"xsrfCookieName":"XSRF-TOKEN","xsrfHeaderName":"X-XSRF-TOKEN","maxContentLength":-1}}
The results doesn't not contain the custom message 'wrong username or password'
have actually gotten the solution, something simple
the error data can be accessed from
console.log(error.response.data);
flask by default returns html page instead of json when error is thrown. to make run return normal json as with 200's responses write this in your flask app:
from werkzeug.exceptions import HTTPException
#app.errorhandler(HTTPException)
def handle_exception(e):
"""Return JSON instead of HTML for HTTP errors."""
print(e)
# start with the correct headers and status code from the error
response = e.get_response()
# replace the body with JSON
response.data = json.dumps({
"code": e.code,
"name": e.name,
"description": e.description,
})
response.content_type = "application/json"
return response
then for example for such return in flask
...
return json.dumps(str(e)), 409
and then you can catch in your js:
...
}).then(function(response) {
...
}).catch((error) => {
console.log(error.response.data); // will log your error as string
})
I am trying to test a very simple Express App. I have my Express set up in a typescript file as follows to respond with the body of the request that it receives:
app.listen(3000, () => console.log('Server running on port 3000'))
app.use(bodyParser.urlencoded({
extended: true
}))
app.use(bodyParser.json())
app.get('/test', (req, res) => {
res.send(req.body)
});
I am trying to call this endpoint in a python file as follows
testUrl = 'http://localhost:3000'
path = '/test'
header = {
'Content-Type': 'application/json',
}
body = {
'artistName': 'test',
}
response = requests.request(
method="GET",
url = testUrl + path,
params=header,
data=body,
)
print(response._content)
When I run the python file, all it prints out is a set of empty brackets, telling me that the body of the request it is receiving is empty. Why is the body empty if I am setting the data parameter to a populated json object? Am I using the wrong parameters? Thanks for the help!
I don't know what you mean to do with res.send(req.body) in your Express code, but req.body is not used for a GET request in Express. That's used for a POST or PUT.
Parameters for a GET request are put in the URL as part of the queryString and will appear in the req.query object in Express.
I think your mistake is in the request,
Because you are sending your header as params
I'm trying to get the FB messenger API working using Python's Flask, adapting the following instructions: https://developers.facebook.com/docs/messenger-platform/quickstart
So far, things have been going pretty well. I have verified my callback and am able to receive the messages I send using Messenger on my page, as in the logs in my heroku server indicate the appropriate packets of data are being received by my server. Right now I'm struggling a bit to send responses to the client messenging my app. In particular, I am not sure how to perform the following segment from the tutorial in Flask:
var token = "<page_access_token>";
function sendTextMessage(sender, text) {
messageData = {
text:text
}
request({
url: 'https://graph.facebook.com/v2.6/me/messages',
qs: {access_token:token},
method: 'POST',
json: {
recipient: {id:sender},
message: messageData,
}
}, function(error, response, body) {
if (error) {
console.log('Error sending message: ', error);
} else if (response.body.error) {
console.log('Error: ', response.body.error);
}
});
}
So far, I have this bit in my server-side Flask module:
#app.route('/', methods=["GET", "POST"])
def chatbot_response():
data = json.loads(req_data)
sender_id = data["entry"][0]["messaging"][0]["sender"]["id"]
url = "https://graph.facebook.com/v2.6/me/messages"
qs_value = {"access_token": TOKEN_OMITTED}
json_response = {"recipient": {"id": sender_id}, "message": "this is a test response message"}
response = ("my response text", 200, {"url": url, "qs": qs_value, "method": "POST", "json": json_response})
return response
However, running this, I find that while I can process what someone send my Page, it does not send a response back (i.e. nothing shows up in the messenger chat box). I'm new to Flask so any help would be greatly appreciated in doing the equivalent of the Javascript bit above in Flask.
Thanks!
This is the code that works for me:
data = json.loads(request.data)['entry'][0]['messaging']
for m in data:
resp_id = m['sender']['id']
resp_mess = {
'recipient': {
'id': resp_id,
},
'message': {
'text': m['message']['text'],
}
}
fb_response = requests.post(FB_MESSAGES_ENDPOINT,
params={"access_token": FB_TOKEN},
data=json.dumps(resp_mess),
headers = {'content-type': 'application/json'})
key differences:
message needs a text key for the actual response message, and you need to add the application/json content-type header.
Without the content-type header you get the The parameter recipient is required error response, and without the text key under message you get the param message must be non-empty error response.
This is the Flask example using fbmq library that works for me:
echo example :
from flask import Flask, request
from fbmq import Page
page = fbmq.Page(PAGE_ACCESS_TOKEN)
#app.route('/webhook', methods=['POST'])
def webhook():
page.handle_webhook(request.get_data(as_text=True))
return "ok"
#page.handle_message
def message_handler(event):
page.send(event.sender_id, event.message_text)
In that scenario in your tutorial, the node.js application is sending an HTTP POST request back to Facebook's servers, which then forwards the content on to the client.
So far, sounds like your Flask app is only receiving (AKA serving) HTTP requests. The reason is that that's what the Flask library is all about, and it's the only thing that Flask does.
To send an HTTP request back to Facebook, you can use any Python HTTP client library you like. There is one called urllib in the standard library, but it's a bit clunky to use... try the Requests library.
Since your request handler is delegating to an outgoing HTTP call, you need to look at the response to this sub-request also, to make sure everything went as planned.
Your handler may end up looking something like
import json
import os
from flask import app, request
# confusingly similar name, keep these straight in your head
import requests
FB_MESSAGES_ENDPOINT = "https://graph.facebook.com/v2.6/me/messages"
# good practice: don't keep secrets in files, one day you'll accidentally
# commit it and push it to github and then you'll be sad. in bash:
# $ export FB_ACCESS_TOKEN=my-secret-fb-token
FB_TOKEN = os.environ['FB_ACCESS_TOKEN']
#app.route('/', method="POST")
def chatbot_response():
data = request.json() # flasks's request object
sender_id = data["entry"][0]["messaging"][0]["sender"]["id"]
send_back_to_fb = {
"recipient": {
"id": sender_id,
},
"message": "this is a test response message"
}
# the big change: use another library to send an HTTP request back to FB
fb_response = requests.post(FB_MESSAGES_ENDPOINT,
params={"access_token": FB_TOKEN},
data=json.dumps(send_back_to_fb))
# handle the response to the subrequest you made
if not fb_response.ok:
# log some useful info for yourself, for debugging
print 'jeepers. %s: %s' % (fb_response.status_code, fb_response.text)
# always return 200 to Facebook's original POST request so they know you
# handled their request
return "OK", 200
When doing responses in Flask, you have to be careful. Simply doing a return statement won't return anything to the requester.
In your case, you might want to look at jsonify(). It will take a Python dictionary and return it to your browser as a JSON object.
from flask import jsonify
return jsonify({"url": url, "qs": qs_value, "method": "POST", "json": json_response})
If you want more control over the responses, like setting codes, take a look at make_response()
I am sending an http request to a server, and it keeps throwing a 400 http error
with an error message of Non Canonical Serialization. I am trying to get my head around what this message means from what i've read up so far it sounds like it has something to do with my object keys not being sorted when I serialize it to JSON meaning the server doesn't get the same result each time I send the request I just wanted to know if this is along the right lines? Or is it something else totally?
Here is my code sending the request to the server:
def submit(mutation, pubkey, signature):
headers = {'content-type' : 'application/json'}
url = "http://192.168.99.100:8080/submit/"
data = {
"mutation": mutation,
"signatures": [
{
"pub_key": pubkey,
"signature": signature
}
]
}
response = urllib2.Request(url, headers = { "Content-Type": "application/json"}, data=json.dumps(data))
f = urllib2.urlopen(response)
print f