1 files changed, 164 insertions, 0 deletions
diff --git a/telepot/api.py b/telepot/api.py
new file mode 100644
index 0000000..3ffa788
--- /dev/null
+++ b/telepot/api.py
@@ -0,0 +1,164 @@
+import urllib3
+import logging
+import json
+import re
+import os
+
+from . import exception, _isstring
+
+# Suppress InsecurePlatformWarning
+urllib3.disable_warnings()
+
+
+_default_pool_params = dict(num_pools=3, maxsize=10, retries=3, timeout=30)
+_onetime_pool_params = dict(num_pools=1, maxsize=1, retries=3, timeout=30)
+
+_pools = {
+    'default': urllib3.PoolManager(**_default_pool_params),
+}
+
+_onetime_pool_spec = (urllib3.PoolManager, _onetime_pool_params)
+
+
+def set_proxy(url, basic_auth=None):
+    """
+    Access Bot API through a proxy.
+
+    :param url: proxy URL
+    :param basic_auth: 2-tuple ``('username', 'password')``
+    """
+    global _pools, _onetime_pool_spec
+    if not url:
+        _pools['default'] = urllib3.PoolManager(**_default_pool_params)
+        _onetime_pool_spec = (urllib3.PoolManager, _onetime_pool_params)
+    elif basic_auth:
+        h = urllib3.make_headers(proxy_basic_auth=':'.join(basic_auth))
+        _pools['default'] = urllib3.ProxyManager(url, proxy_headers=h, **_default_pool_params)
+        _onetime_pool_spec = (urllib3.ProxyManager, dict(proxy_url=url, proxy_headers=h, **_onetime_pool_params))
+    else:
+        _pools['default'] = urllib3.ProxyManager(url, **_default_pool_params)
+        _onetime_pool_spec = (urllib3.ProxyManager, dict(proxy_url=url, **_onetime_pool_params))
+
+def _create_onetime_pool():
+    cls, kw = _onetime_pool_spec
+    return cls(**kw)
+
+def _methodurl(req, **user_kw):
+    token, method, params, files = req
+    return 'https://api.telegram.org/bot%s/%s' % (token, method)
+
+def _which_pool(req, **user_kw):
+    token, method, params, files = req
+    return None if files else 'default'
+
+def _guess_filename(obj):
+    name = getattr(obj, 'name', None)
+    if name and _isstring(name) and name[0] != '<' and name[-1] != '>':
+        return os.path.basename(name)
+
+def _filetuple(key, f):
+    if not isinstance(f, tuple):
+        return (_guess_filename(f) or key, f.read())
+    elif len(f) == 1:
+        return (_guess_filename(f[0]) or key, f[0].read())
+    elif len(f) == 2:
+        return (f[0], f[1].read())
+    elif len(f) == 3:
+        return (f[0], f[1].read(), f[2])
+    else:
+        raise ValueError()
+
+import sys
+PY_3 = sys.version_info.major >= 3
+def _fix_type(v):
+    if isinstance(v, float if PY_3 else (long, float)):
+        return str(v)
+    else:
+        return v
+
+def _compose_fields(req, **user_kw):
+    token, method, params, files = req
+
+    fields = {k:_fix_type(v) for k,v in params.items()} if params is not None else {}
+    if files:
+        fields.update({k:_filetuple(k,v) for k,v in files.items()})
+
+    return fields
+
+def _default_timeout(req, **user_kw):
+    name = _which_pool(req, **user_kw)
+    if name is None:
+        return _onetime_pool_spec[1]['timeout']
+    else:
+        return _pools[name].connection_pool_kw['timeout']
+
+def _compose_kwargs(req, **user_kw):
+    token, method, params, files = req
+    kw = {}
+
+    if not params and not files:
+        kw['encode_multipart'] = False
+
+    if method == 'getUpdates' and params and 'timeout' in params:
+        # Ensure HTTP timeout is longer than getUpdates timeout
+        kw['timeout'] = params['timeout'] + _default_timeout(req, **user_kw)
+    elif files:
+        # Disable timeout if uploading files. For some reason, the larger the file,
+        # the longer it takes for the server to respond (after upload is finished).
+        # It is unclear how long timeout should be.
+        kw['timeout'] = None
+
+    # Let user-supplied arguments override
+    kw.update(user_kw)
+    return kw
+
+def _transform(req, **user_kw):
+    kwargs = _compose_kwargs(req, **user_kw)
+
+    fields = _compose_fields(req, **user_kw)
+
+    url = _methodurl(req, **user_kw)
+
+    name = _which_pool(req, **user_kw)
+
+    if name is None:
+        pool = _create_onetime_pool()
+    else:
+        pool = _pools[name]
+
+    return pool.request_encode_body, ('POST', url, fields), kwargs
+
+def _parse(response):
+    try:
+        text = response.data.decode('utf-8')
+        data = json.loads(text)
+    except ValueError:  # No JSON object could be decoded
+        raise exception.BadHTTPResponse(response.status, text, response)
+
+    if data['ok']:
+        return data['result']
+    else:
+        description, error_code = data['description'], data['error_code']
+
+        # Look for specific error ...
+        for e in exception.TelegramError.__subclasses__():
+            n = len(e.DESCRIPTION_PATTERNS)
+            if any(map(re.search, e.DESCRIPTION_PATTERNS, n*[description], n*[re.IGNORECASE])):
+                raise e(description, error_code, data)
+
+        # ... or raise generic error
+        raise exception.TelegramError(description, error_code, data)
+
+def request(req, **user_kw):
+    fn, args, kwargs = _transform(req, **user_kw)
+    r = fn(*args, **kwargs)  # `fn` must be thread-safe
+    return _parse(r)
+
+def _fileurl(req):
+    token, path = req
+    return 'https://api.telegram.org/file/bot%s/%s' % (token, path)
+
+def download(req, **user_kw):
+    pool = _create_onetime_pool()
+    r = pool.request('GET', _fileurl(req), **user_kw)
+    return r