User tracking method, server, and client

A user tracking method, comprising:

• receiving, by a client, an access response corresponding to a historical access request sent by a server, wherein the access response carries a preset identifier and a historical identifier value, and wherein the historical identifier value is a value of the preset identifier;
• and
• sending, by the client, an HTTP protocol-based access request to the server, wherein the access request comprises the preset identifier and a current identifier value corresponding to the preset identifier, and wherein the current identifier value corresponding to the preset identifier is the historical identifier value;
• wherein, after the client receives the access response and before the client sends the HTTP protocol-based access request to the server, the method further comprises:
• receiving, by the client, a program for verifying legality of the server sent by the server, wherein the program comprises:
• calculating a random number and a user seed according to a preset algorithm to obtain an identifier value corresponding to the preset identifier;
• running, by the client, the program to obtain a new identifier value of the preset identifier;
• and
• verifying, by the client, that the server is legal when determining that the new identifier value is same as the received historical identifier value.

A user tracking server, comprising:

• a receiving unit configured to receive an HTTP protocol-based access request sent by a client;
• a processing unit configured to:
• in response to determining that the access request comprises a preset identifier and that a current identifier value corresponding to the preset identifier matches with a historical identifier value in a historical identifier set stored by the server, determine a user seed from the historical identifier set according to the current identifier value, wherein the historical identifier set comprises a correspondence between historical identifier values and user seeds, and the historical identifier value is generated by the server based on a user seed corresponding to the historical identifier value and a random number, and the user seed is used to identify a same user recognized by the server based on the access request;
• and
• a tracking unit configured to track an access behavior of the user seed.

A user tracking client, comprising:

• a receiving unit configured to receive an access response corresponding to a historical access request sent by a server, wherein the access response carries a preset identifier and a historical identifier value, and the historical identifier value is a value of the preset identifier;
• and
• a sending unit configured to send an HTTP protocol-based access request to the server, wherein the access request comprises the preset identifier and a current identifier value corresponding to the preset identifier, and wherein the current identifier value corresponding to the preset identifier is the historical identifier value;
• wherein, the receiving unit is further configured to:
• receive a program for verifying legality of the server sent by the server, wherein the program comprises:
• calculating a random number and a user seed according to a preset algorithm to obtain an identifier value corresponding to the preset identifier;
• a processing unit is comprised and configured to:
• run the program to obtain a new identifier value of the preset identifier;
• and verify that the server is legal in response to determining that the new identifier value is same as the received historical identifier value.