我们从Python开源项目中，提取了以下37个代码示例，用于说明如何使用urllib.request.has_header()。
def has_header(self, header_name): return (header_name in self.headers or header_name in self.unredirected_hdrs)
def add_cookie_header(self, request): """Add correct Cookie: header to request (urllib.request.Request object). The Cookie2 header is also added unless policy.hide_cookie2 is true. """ _debug("add_cookie_header") self._cookies_lock.acquire() try: self._policy._now = self._now = int(time.time()) cookies = self._cookies_for_request(request) attrs = self._cookie_attrs(cookies) if attrs: if not request.has_header("Cookie"): request.add_unredirected_header( "Cookie", "; ".join(attrs)) # if necessary, advertise that we know RFC 2965 if (self._policy.rfc2965 and not self._policy.hide_cookie2 and not request.has_header("Cookie2")): for cookie in cookies: if cookie.version != 1: request.add_unredirected_header("Cookie2", '$Version="1"') break finally: self._cookies_lock.release() self.clear_expired_cookies()
def test_custom_headers(self): url = "http://www.example.com" with support.transient_internet(url): opener = urllib.request.build_opener() request = urllib.request.Request(url) self.assertFalse(request.header_items()) opener.open(request) self.assertTrue(request.header_items()) self.assertTrue(request.has_header('User-agent')) request.add_header('User-Agent','Test-Agent') opener.open(request) self.assertEqual(request.get_header('User-agent'),'Test-Agent')
def do_request_(self, request): host = request.host if not host: raise URLError('no host given') if request.data is not None: # POST data = request.data if isinstance(data, str): raise TypeError("POST data should be bytes" " or an iterable of bytes. It cannot be str.") if not request.has_header('Content-type'): request.add_unredirected_header( 'Content-type', 'application/x-www-form-urlencoded') if not request.has_header('Content-length'): try: mv = memoryview(data) except TypeError: if isinstance(data, collections.Iterable): raise ValueError("Content-Length should be specified " "for iterable data of type %r %r" % (type(data), data)) else: request.add_unredirected_header( 'Content-length', '%d' % (len(mv) * mv.itemsize)) sel_host = host if request.has_proxy(): scheme, sel = splittype(request.selector) sel_host, sel_path = splithost(sel) if not request.has_header('Host'): request.add_unredirected_header('Host', sel_host) for name, value in self.parent.addheaders: name = name.capitalize() if not request.has_header(name): request.add_unredirected_header(name, value) return request
def data(self, data): if data != self._data: self._data = data # issue 16464 # if we change data we need to remove content-length header # (cause it's most probably calculated for previous value) if self.has_header("Content-length"): self.remove_header("Content-length")
def do_request_(self, request): host = request.host if not host: raise URLError('no host given') if request.data is not None: # POST data = request.data if isinstance(data, str): msg = "POST data should be bytes or an iterable of bytes. " \ "It cannot be of type str." raise TypeError(msg) if not request.has_header('Content-type'): request.add_unredirected_header( 'Content-type', 'application/x-www-form-urlencoded') if not request.has_header('Content-length'): try: mv = memoryview(data) except TypeError: if isinstance(data, collections.Iterable): raise ValueError("Content-Length should be specified " "for iterable data of type %r %r" % (type(data), data)) else: request.add_unredirected_header( 'Content-length', '%d' % (len(mv) * mv.itemsize)) sel_host = host if request.has_proxy(): scheme, sel = splittype(request.selector) sel_host, sel_path = splithost(sel) if not request.has_header('Host'): request.add_unredirected_header('Host', sel_host) for name, value in self.parent.addheaders: name = name.capitalize() if not request.has_header(name): request.add_unredirected_header(name, value) return request
def do_request_(self, request): host = request.host if not host: raise URLError('no host given') if request.data is not None: # POST data = request.data if isinstance(data, str): msg = "POST data should be bytes or an iterable of bytes. " \ "It cannot be of type str." raise TypeError(msg) if not request.has_header('Content-type'): request.add_unredirected_header( 'Content-type', 'application/x-www-form-urlencoded') if not request.has_header('Content-length'): size = None try: ### For Python-Future: if PY2 and isinstance(data, array.array): # memoryviews of arrays aren't supported # in Py2.7. (e.g. memoryview(array.array('I', # [1, 2, 3, 4])) raises a TypeError.) # So we calculate the size manually instead: size = len(data) * data.itemsize ### else: mv = memoryview(data) size = len(mv) * mv.itemsize except TypeError: if isinstance(data, collections.Iterable): raise ValueError("Content-Length should be specified " "for iterable data of type %r %r" % (type(data), data)) else: request.add_unredirected_header( 'Content-length', '%d' % size) sel_host = host if request.has_proxy(): scheme, sel = splittype(request.selector) sel_host, sel_path = splithost(sel) if not request.has_header('Host'): request.add_unredirected_header('Host', sel_host) for name, value in self.parent.addheaders: name = name.capitalize() if not request.has_header(name): request.add_unredirected_header(name, value) return request
