A basic knowledge of reptiles

Understanding of HTTP, HTTPS

1.http: Hypertext Transfer Protocol

• Transmitted in plaintext
• More efficient, but not safe

2.https: http + ssl (Secure Sockets Layer)

• Before transmission data is first encrypted and then decrypted to obtain the content
• Low efficiency, but safety

3.get request and the difference between the post request

• get request does not request body, post there, into the get request url address data;
• Login Register commonly used in post requests confidentiality;
• post requests get request carries data than larger more commonly used when the transmission of large text.

Request 4.http Agreement

• 1. Request line

  GET /8hr/page/1/ HTTP/1.1

• 2. The request body
  • User-Agent: User-agent: the other server can know the current request by user_agent other resources is what browser
    • If we need to simulate mobile version of the browser sends a request, the corresponding need to change the user-agent mobile version
  • Cookie: the user to store user information, each request will be sent to carry the browser on the other side
    • To obtain a login to access the page
    • The other servers will be judged by our cookie is a reptile
  • Referer: the origin of the current page, usually on a url
• 3. The request body
  • Carry data
  • did not get request
  • There are post requests　　　　

In response 5.http Agreement

• 1. Response Header
  • Set-Cookie: server cookie to each other through the local field is set
• 2. Response Body
  • url addresses corresponding response