End-to-end file transmission method and system thereof

An end-to-end file transmitting method for a file receiving and forwarding server, wherein the file receiving and forwarding server is provided in a file transmitting system coupling a plurality of network file systems including a first network file system and a second network file system, a plurality of network access servers including a first network access server and a second network access server, a plurality of client servers including a first client server and a second client server, and a plurality of backstage servers including a first backstage server and a second backstage server;

• and wherein the plurality of network file systems one-to-one correspond to the plurality of backstage servers, and the plurality of network access servers one-to-one correspond to the plurality client servers, each network access server being configured to establish a connection between the file receiving and forwarding server and the corresponding client server, the file transmitting method comprising:
• receiving, by the file receiving and forwarding server, multiple file transmitting requests from the first backstage server, wherein each of the multiple file transmitting requests indicates a file sending party, a file destination party and a file-to-be-transmitted, the first backstage server corresponds to the first network file system, the second network file system corresponds to the second backstage server, and the multiple file transmitting requests including a first file transmitting request indicating that the file sending party is the first backstage server and the file destination party is the second backstage server, and a second file transmitting request indicating that the file sending party is the first backstage server and the file destination party is the first client server;
• verifying, by the file receiving and forwarding server, legitimacy of each of the multiple file transmitting requests from the first backstage server and, after verifying that one of the multiple file transmitting requests is not legitimate, generating and returning a response prohibiting file transmitting to the first backstage server;
• after verifying that the first file transmitting request is legitimate, determining, by the file receiving and forwarding server, that the file sending party is the first backstage server, and the file destination party is the second backstage server, and completing, by the file receiving and forwarding server, end-to-end file transmitting between the first backstage server and the second backstage server by:
• reading the file-to-be-transmitted from the first network file system, and
• storing the file-to-be-transmitted in the second network file system for the second backstage server.