Access Lovoo API using Python

Lovoo is using OAuth 1 protocol (https://tools.ietf.org/html/draft-hammer-oauth-10).

I have previously worked with the Lovoo API. One thing I can say is that your account will soon get limited by their BOT detection algorithms. I didn't try with different combinations of HTTP headers. Hence, that may be worth the try.

However, I have published my work on Github for others to give it a try. Below you can find the functions required to make the API calls. To see some examples of how to use these functions, have a look at the above-mentioned repo.

import urllib.parse


# MD5 hashing of an input string
def md5(data: str):
    import hashlib
    return hashlib.md5(data.encode('utf-8')).hexdigest()


def normalize_params(params: dict):
    # Comply with https://tools.ietf.org/html/draft-hammer-oauth-10
    # params must be sorted alphabetically first by keys and then values
    params = dict(sorted(params.items(), key=lambda x: (x[0], x[1]), reverse=False))
    p_encoded = '&'.join(
        ["{}={}".format(urllib.parse.quote_plus(k), urllib.parse.quote_plus(v)) for k, v in params.items() if v != ''])
    # Percent encode
    p_quoted = urllib.parse.quote_plus(p_encoded)
    return p_quoted


def generate_base_string(params: str, url: str, method: str = 'GET'):
    # Comply with https://tools.ietf.org/html/draft-hammer-oauth-10
    base_str = method + '&' + urllib.parse.quote_plus(url) + '&' + params
    return base_str


# Secret hashing used in Lovoo
def secret_hash(pwd: str) -> str:
    pwd = md5("SALTforPW" + pwd)
    return md5("SALTforSecret" + pwd)


def sign_request(client_identifier: str, client_secret: str, token: str, token_secret: str, url: str, nounce: str,
                 timestamp: str, method: str = 'GET', payload: dict = None, callback_url: str = '', oauth_version: str = '1.0'):
    from hashlib import sha1
    import hmac
    import base64

    params = {
        'oauth_callback': callback_url,
        'oauth_consumer_key': client_identifier,
        'oauth_nonce': nounce,
        'oauth_signature_method': 'HMAC-SHA1',
        'oauth_timestamp': timestamp,
        'oauth_token': token,
        'oauth_version': oauth_version
    }

    # Normalize parameters
    if payload is not None:
        params = {**params, **payload}
    np = normalize_params(params)
    # Generate base string
    base_string = generate_base_string(np, url, method)

    if token != '':
        key = (f"{client_secret}&{token_secret}").encode()
    else:
        key = (client_secret + '&').encode()

    raw = base_string.encode()

    hashed = hmac.new(key, raw, sha1)

    # The signature
    return base64.b64encode(hashed.digest()).decode().rstrip('\n')

Please note that It's been some time since I tested that code and there might be some changes to Lovoo's API. Let me know if it didn't work and I will have a look.

An alternative approach would be the use of selenium for login and further using the session with requests.

E.g.

def login(user, pw):
    chrome_options = Options()
    chrome_options.add_experimental_option("detach", True)
    driver = webdriver.Chrome(options=chrome_options)
    driver.get("https://www.lovoo.com/login_check")
    user_agent = driver.execute_script("return navigator.userAgent;")
    iframe = driver.find_element(By.ID,"gdpr-consent-notice")
    driver.switch_to.frame(iframe)
    privacybutton = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.XPATH,"//b[contains(text(),'Accept All')]"))
    )
    privacybutton.click()
    driver.switch_to.default_content()
    loginbutton = WebDriverWait(driver, 4).until(
        EC.presence_of_element_located((By.XPATH, "//button[contains(text(),'Log in')]"))
    )
    loginbutton.click()
    loginbutton2=WebDriverWait(driver, 4).until(
        EC.presence_of_element_located((By.XPATH, "//button[contains(@data-automation-id,'login-submit-button')]"))
    )
    driver.find_element(By.XPATH, '//input[@name="authEmail"]').send_keys(user)
    driver.find_element(By.XPATH, '//input[@name="authPassword"]').send_keys(pw)
    webdriver.ActionChains(driver).move_to_element(loginbutton2).click(loginbutton2).perform()
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "topmenu"))
    )
    return user_agent, driver.get_cookies()

(lat,lon)=(0.0,0.0)
with requests.Session() as session:
    user_agent, cookies = login(user, pw)
    session.cookies.update({c['name']: c['value'] for c in cookies})
    session.headers.update({'User-Agent': user_agent})
    session.get(f'https://www.lovoo.com/api_web.php/users?ageFrom=0&ageTo=2&latitude={lat}&longitude={lon}')