"数据通信与计算机网络：Socket编程实验设计与实现"

The 20171 socket programming experiment involved determining the length of a message, assuming a maximum length of 255 characters. The experiment also required the design of a specific protocol (preferably an application layer protocol) using standard Socket API programming to implement the protocol's functionality. The protocol design could be inspired by HTTP, with similar syntax and semantics. The protocol design needed to include a custom header field, ensuring comprehensive functionality. The server side had to understand various client requests and have error handling mechanisms in place. The experiment generally called for the use of Python programming unless otherwise specified, and prohibited the use of additional libraries for socket programming. In summary, the socket programming experiment aimed to develop a network program at the user level using Socket API, design a custom protocol with error handling mechanisms, and implement the protocol's functionality using Python programming. Additionally, the experiment encouraged the creation of a raw HTTP connection as a potential application scenario.