client-server

I want to program an application to send a file with sockets: Here my Server: void str_server(int sock) { char buf[1025]; const char* filename="test.text"; FILE *file = fopen(filename, "rb"); err_abort("Test"); while (!feof(file)) { int rval = fread(buf, 1, sizeof(buf), file); send(sock, buf, rval, 0); } } and here my client: void RecvFile(int sock, const char* filename) { int rval; char buf[0x1000]; FILE *file = fopen(filename, "wb"); while ((rval = recv(sock, buf, sizeof(buf), 0)) > 0) { fwrite(buf, 1, rval, file); } close(sock); } My problem is that my client create a file....but dont write

i will provide you with my question clearly so you can answer me I have a client-server (socket) connection that i secured using SslStream and as i know using ssl makes me sure that my client will only connect to my server And to do that i must add a function to my client to validate the server certification and make sure that the server is the real one (my server) but i really don't get how could i validate my self-signed certification and want your help Regards, and my thanks in advance Imagine if the certificate were not self signed - it is signed by a trusted certificate authority. The

I have a simple question which I can not find a simple answer to, probably I am missing something or I don t know about how some networking concept works. And I want to know what I don t know. Simply, the question is while eavesdropping is possible, how can server know the request is coming from client, not the eavesdropping hacker. Scenario : Whatever the security policy I am having, I should send something to client. It might be a asymmetric encrypted token or sth. Client has no private key, so that whatever client is able to do, send etc, a hacker can do, send too. What might be the logic

I have built some server-side APIs work through HTTP, for my client-side applications only. So, is it possible to authenticate applications between client-side and server-side; and how to? There are two options: Sessions HTTP authentication The idea behind session is that the server sends a hard to guess value to the client and the client subsequently passes that value back to the server on each request. That way, the server knows from which client the request likely comes from and can keep track of whether the client has authenticated itself with the server (e.g. by having provided username

I wish to make an Air 2 Server via ServerSocket class (you will find below code an example about it). Constraints : Server must be in Air Client must be displayed through web browser Clients are displayed with an Web browser so when a client want to establish a connection to Air server, Flash sends a crossdomain request through socket and server sends it back but nothing hapen then. The As3Doc specifies that when flash sends crossdomain request, server must to send it back, then Flash closes connection and open a new connection if crossdomain is ok. I've tried different settings but nothing

I have a webpage (built using HTML & jQuery) which displays the data from a MySQL database. I am using Flask to connect HTML with my database. However, my database gets updated every 15 minutes (using a separate Python Script). Currently, I stop the flask server, update the database and restart the Flask to update the webpage. My question is the following: Is there a way to update the MySQL database in the background without having to stop the flask server? I read about concepts of AJAX and CRON, however i am not able to understand how to use them with flask asynchronously. Note: I am a newbie