Python PycURL [miguel angel torres egea]

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= Python PycURL
/via: [[https://www.rapidseedbox.com/blog/python-curl]]
  * requests: [[info:cursos:pue:python-pcpp1:m4:1.6|]]

== setup
  * PycURL es un intefaz python para interactuar con cURL (más completa/compleja que **requests**)
  * <code bash>sudo apt install libcurl4-openssl-dev libssl-dev</code>
  * <code python>pip install pycurl</code>

== comandos básicos con requests
  * <code python># Basic Commands with Requests

import requests

get_response = requests.get('https://sampleurl.com')
print(get_response.text)
</code>
  * <code python># POST Request with Requests

import requests

payload = {'param': 'value'}
post_response = requests.post('https://sampleurl.com', data=payload)
print(post_response.text)
</code>
  * <code python>import requests

try:
get_response = requests.get('https://example.com')
get_response.raise_for_status()
print(get_response.text)

except requests.exceptions.HTTPError as http_err:
print(f'HTTP error occurred: {http_err}')

except Exception as err:
print(f'Other error occurred: {err}')
</code>

== comandos básicos con pycurl
  * <code python># GET Request with PyURL

from pycurl import Curl
from io import BytesIO

curl_obj = Curl()
response_buffer = BytesIO()
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com')
curl_obj.setopt(curl_obj.WRITEDATA, response_buffer)
curl_obj.perform()
curl_obj.close()

response_body = response_buffer.getvalue().decode('utf-8')
print(response_body)
</code>
  * <code python># POST Request with PycURL

from pycurl import Curl
from io import BytesIO
from urllib.parse import urlencode

curl_obj = Curl()
response_buffer = BytesIO()
payload = {'param': 'value'}
encoded_payload = urlencode(payload)
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com')
curl_obj.setopt(curl_obj.POSTFIELDS, encoded_payload)
curl_obj.setopt(curl_obj.WRITEDATA, response_buffer)
curl_obj.perform()
curl_obj.close()

response_body = response_buffer.getvalue().decode('utf-8')
print(response_body)
</code>
  * <code python># Handling Responses with PycURL

from pycurl import Curl
from io import BytesIO

curl_obj = Curl()
response_buffer = BytesIO()
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com')
curl_obj.setopt(curl_obj.WRITEDATA, response_buffer)
curl_obj.perform()
http_code = curl_obj.getinfo(curl_obj.RESPONSE_CODE)
curl_obj.close()

if http_code == 200:
print("Success:", response_buffer.getvalue().decode('utf-8'))
else:
print("Error:", http_code)
</code>

== comandos avanzados con requests
  * Enviando JSON:<code python>import requests

payload = {'param': 'value'}
post_response = requests.post('https://sampleurl.com', json=payload)
print(post_response.text)
</code>
  * Enviando cabeceras:<code python>import requests

headers = {
'User-Agent': 'CustomUserAgent',
'Accept': 'application/json'
}
get_response = requests.get('https://sampleurl.com', headers=headers)
print(get_response.text)
</code>
  * Enviando fichero:<code python>import requests

files = {'file': open('path/to/your/file.txt', 'rb')}
post_response = requests.post('https://sampleurl.com/upload', files=files)
print(post_response.text)
</code>
  * Recibiendo fichero:<code python>import requests

files = {'file': open('path/to/your/file.txt', 'rb')}
post_response = requests.post('https://sampleurl.com/upload', files=files)
print(post_response.text)
</code>

== comandos avanzados con pycurl
  * Enviando JSON:<code python>from pycurl import Curl
from io import BytesIO
import json

curl_obj = Curl()
response_buffer = BytesIO()
payload = {'param': 'value'}
postfields = json.dumps(payload)
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com')
curl_obj.setopt(curl_obj.POSTFIELDS, postfields)
curl_obj.setopt(curl_obj.HTTPHEADER, &#91;'Content-Type: application/json'])
curl_obj.setopt(curl_obj.WRITEDATA, response_buffer)
curl_obj.perform()
curl_obj.close()
response_body = response_buffer.getvalue().decode('utf-8')
print(response_body)
</code>
  * Enviando cabeceras:<code python>from pycurl import Curl
from io import BytesIO

curl_obj = Curl()
response_buffer = BytesIO()
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com')
curl_obj.setopt(curl_obj.HTTPHEADER, &#91;'User-Agent: CustomUserAgent', 'Accept: application/json'])
curl_obj.setopt(curl_obj.WRITEDATA, response_buffer)
curl_obj.perform()
curl_obj.close()
response_body = response_buffer.getvalue().decode('utf-8')
print(response_body)
</code>
  * Enviando fichero:<code python>from pycurl import Curl

curl_obj = Curl()
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com/upload')
curl_obj.setopt(curl_obj.HTTPPOST, &#91;('file', (curl_obj.FORM_FILE, 'path/to/your/file.txt'))])
curl_obj.perform()
curl_obj.close()
</code>
  * Recibiendo fichero:<code python>from pycurl import Curl
from io import BytesIO

curl_obj = Curl()
response_buffer = BytesIO()
curl_obj.setopt(curl_obj.URL, 'https://sampleurl.com/file.txt')
curl_obj.setopt(curl_obj.WRITEDATA, response_buffer)
curl_obj.perform()
curl_obj.close()

with open('downloaded_file.txt', 'wb') as f:
f.write(response_buffer.getvalue())
</code>

== varis
  * problemas con certificados: [[https://pypi.org/project/certifi/]]