Send data requests http post. **SOLVED**

[livius]

@scg94
Is your board connceted to your router?
https://docs.pycom.io/pycom_esp32/pycom_esp32/tutorial/includes/wlan.html

[scg94]

@livius Hi bro,

Yes, of course, it's connected...

[livius]

@scg94

you call request without specify method - first argument e.g. 'POST'

it looks like not connected to network or host is really unavaiable - but
for test try get instead of post form some of this page - to get some content

same as first

[bucknall]

Hi @scg94,

This appears to be a problem with their use of SSL within their library, I'm having a look at this and I'm getting the same issues. Let me see if I can fix their code!

I'll let you know soon what I discover!

Thanks,

Alex

[RadioTek]

I have been trying to do the same thing using urequest, and have been getting the same error message. Hours spent trying to get to the bottom of it.

[danielm]

Hi, try this urequests.py library, I modified it recently to make it work on LoPy with SSL. Unfortunately I did not comment my changes.
https://drive.google.com/file/d/0B2mvAuXuxQ6BOW5Sa210Wm9SWkk

[scg94]

@danielm Hi,

Do you have any examples of using your library?

[danielm]

@scg94

response = urequests.post("https://<url>", auth=("user", "pass"), headers={"Content-Type": "application/xxx+json", "Accept": "application/xxx+json"}, data='{"id": "%s"}' % myID)

The response will have several properties like response.text, response.status_code, ....
As you probably know you can list them via dir(response).

It is not my library, I just modified it to make it work on my LoPy :)

[RadioTek]

Digging deeper after much time, I find that,
addr = socket.getaddrinfo('www.google.com', 80)[0][-1]
print(addr)
always returns the the same ip address "200.249.64.63"
From lookup on the web this address appears to be registered in Brazil.
Does not matter what URL I use or what DNS address I set in the WIFI
configuration. I have a connection and this is what is returned as the
looked up IP

[jmarcelino]

@RadioTek
Can you post the result of
print(WLAN().ifconfig())

Also any chance you can try it on a completely different WiFi network? or maybe check the DNS result from another computer on the same network?

[RadioTek]

@jmarcelino Hi ,
The result of print(wlan.ifconfig()) is ('10.1.1.37','255.255.255.0','10.1.1.1','8.8.4.4')
I have set the WIFI to a static address. I have tried 10.1.1.1, 8.8.8.8, 8.8.4.4, and
my providers DNS address, and all return the same result.
addr = socket.getaddrinfo('http://www.checkthat.com.au', 80)[0][-1]
print(addr) # returns ('200.249.64.63',80')
Then entering the known IP address for "www.checkthat.com.au"
addr = ('116.0.20.2',80)
print(addr) # returns ('116.0.20.2',80)
sa = socket.socket()
sa.connect(addr)
sa.send(b'GET / HTTP/1.1\r\nHost: checkthat.com.au\r\n\r\n')
data = sa.recv(1000)
sa.close()
print(data) # returns the header information of the page

I have tried this on my mobile network as well, with alternate IP address's
wlan.ifconfig(config=('192.168.43.10', '255.255.255.0', '192.168.43.1', '192.168.43.1')) and it has behaved exactly the same way.

Thanks from Alex

[jmarcelino]

@RadioTek
Thank you for posting those. Just to be sure you're running the latest firmware on the LoPy?

os.uname()

Also when you connected to the mobile network was that using a mobile phone as the WiFi AP?

[RadioTek]

@jmarcelino said in Send data requests http post.:

os.uname()

(sysname='LoPy', nodename='LoPy', release='1.6.10.b1', version='v1.8.6-556-g989d5ac9 on 2017-03-30', machine='LoPy with ESP32', lorawan='1.0.0'

Yes connection to my mobile network was via WIFI using phone as AP

My Laptop "as using now" is worked through my office WIFI network back in to ADSL2. DNS functioning of all computers on the network seems perfect.

Regards Alex

[scg94]

@bucknall @RadioTek @jmarcelino

Hello everyone,

I keep trying to send the requests but I still can not, I want you to see this that came out...

I do not know how to send requests, I even tried connecting the LoPy to the Raspberry through Tx and Rx but I also did not find positive result.

I really need help! Thank you...

[scg94]

@bucknall Hello again,

I think I'm slowly solving things, what I did was change the domain name by IP, and now it works, but I have an error again with the library, this time it speaks of: "TypeError: object with buffer protocol required"...

Do you know what it is about?

[livius]

@scg94
cast data as bytes

urequest.request("POST", url, bytes([your_data])

or create it at start as buffered

[scg94]

@livius Hi,

I tried with this and look at the result ...

>>> datos={"temperatura_rpi": 500}
>>> data=bytes([datos])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: cant convert dict to int
>>> urequest.request("POST" ,"http://50.23.124.68/api/v1.6/devices/raspxxx?token=xxxxxxxxx",{"temperatura_rpi": bytes(500)})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/flash/lib/urequest.py", line 74, in request
TypeError: object with buffer protocol required
>>>

Can you help me?? Thank u...

[livius]

@scg94 said in Send data requests http post.:
third parameter must be buffered
e.g. string or bytes
you can not send dictionary

{"temperatura_rpi": bytes(500)}

do you try to send string?
if yes then concat it

'{"temperatura_rpi": 500}'

or if you have int variable

'{"temperatura_rpi": ' + str(int_var) + '}'

[scg94]

@livius

I already tried with both, look at the error...

>>> urequest.request("POST","http://50.23.124.68/api/v1.6/devices/rasxxxxx?token=xxxxxxxxxxx",'{"temperatura_rpi":' + str(500)+'}')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/flash/lib/urequest.py", line 53, in request
OSError: 23
>>> 

And in the line 53 in library urequest.py is:

s = usocket.socket()

Thanks for your help...

[livius]

@scg94
which library do you finally use?
I supposed that from first post @bucknall - but there is not line like you show