基于WebRTC和TCP的文件传输系统的研究与实现

With the rapid development of Internet technologies, the capabilities of web browsers are becoming more powerful, which enable that users using various rich media applications such as audio and video communication and visual animations. The HTML5 standard as the next-generation HTML is currently supported by most modern browsers. WebRTC (Web Real-Time Communication) consists of a set of standards, protocols, and JavaScript APIs for implementing browsers ( end-to-end audio, video and data sharing, no need to download and install any plugins. This paper studies and designs a file transmission system compatible with unicom and non-unicom network segments. The peer-to-peer direct transmission based on WebRTC technology is used in the same network segment to avoid waste of network resources caused by central server transit. The transmission of cross-network segments adopts socket transmission based on TCP protocol in order to ensure the availability and efficiency of transmission.At the end of the paper, the transmission efficiency of the system is tested and verified, and the unicom and non-unicom domain conditions are compared and analyzed.