By Stephen A. Thomas
The 1st whole reference consultant to the fundamental internet protocol
As purposes and providers converge and internet applied sciences not just imagine HTTP yet require builders to govern it, it truly is changing into more and more the most important for community managers, net masters, and an individual operating with HTTP to appreciate the nuts and bolts of this so much accepted internet protocol. This e-book presents entire documentation and clarification of the protocol, together with complicated and experimental extensions. Readers gets middle suggestions on enforcing HTTP 1.1 of their items, together with how one can speed up HTTP in huge scale websites, tips on how to safe it, and the way to address compatibility matters with types 0.9 and 1.0. HTTP switching and invisible HTTP operations reminiscent of alternative negotiations, prestige tests, and direction tracing also are tested.
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Additional resources for HTTP essentials : protocols for secure, scaleable, Web sites
Example text
As with the client, this does not indicate that the response necessarily includes options defined by that version. 1 in its Status-Line. 0 options in its response. Otherwise it may be sending the client information that the client cannot understand. The blank line here marks the end of message headers; the message body follows. 6 (Unix) Keep-Alive: timeout=5, max=120 Connection: Keep-Alive Content-Type: text/html ... 4 ᮣ An HTTP Status-Line begins with an HTTP version indicator and includes a numerical status code and a textual description of the response.
2 SQL query 1 HTTP request Internet DBMS Client Gateway 3 SQL result 4 HTTP response While gateways act as a definite endpoint to a server chain, tunnels are exactly the opposite. 25 indicates, they are relatively transparent to the original client; the client may not even be aware that a tunnel exists. Tunnels do provide some service, however. 25, the tunnel establishes a secure connection to the actual server, adding security to the communication between client and server. 1 defines the operation of tunnels in general terms, as of this writing few practical implementations are available.
If the online broker sends the browser a cookie, how can the sporting goods site, which is on a different server, retrieve that cookie from the user? The trick, in this case, is that cookie doesn’t belong to either server. Rather, it is owned by a third party ad server that has arrangements with both the broker and sporting goods sites. 31 ᮣ A Web page may include objects from multiple servers, and each server may provide its own cookies when returning its objects. In this example the main page is from Web site 1, but the page includes an object from the ad server.