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參考文章：Python實(shí)用腳本清單

http不只有get方法（請(qǐng)求頭部+正文），還有head方法，只請(qǐng)求頭部。

import httplib

def get_status_code(host, path="/"):
    """ This function retreives the status code of a website by requesting
        HEAD data from the host. This means that it only requests the headers.
        If the host cannot be reached or something else goes wrong, it returns
        None instead.
    """
    try:
        conn = httplib.HTTPConnection(host)
        conn.request("HEAD", path)
        return conn.getresponse().status
    except StandardError:
        return None
        
print get_status_code("segmentfault.com") # prints 200
print get_status_code("segmentfault.com", "/nonexistant") # prints 404

你用get請(qǐng)求就會(huì)請(qǐng)求整個(gè)頭部+正文, 可以試下head方法, 直接訪問(wèn)頭部!

import requests
html = requests.head('http://segmentfault.com')    # 用head方法去請(qǐng)求資源頭部
print html.status_code  # 狀態(tài)碼

html = requests.head('/nonexistant')   # 用head方法去請(qǐng)求資源頭部
print html.status_code   # 狀態(tài)碼

# 輸出:
200
404