C/C++ :: How To Send Many Images Through Socket
Jun 25, 2012
I have written a socket witch send an image 256x256 and now i want to send many images and i don't know what loop to write to make the socket after have sent the first image to send another and not to write the same program many times for every image ......
this is the part that read the binary image
if( !(fp=fopen("Anemos.bmp","rb"))) {
printf("Unable to load bin file: %s...
","Anemos.bmp");
[Code] ....
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Jun 28, 2014
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace test {
[Code] ....
I don't know if this is a bug in Winsock or the .NET Framework but i need to fix this or workaround. Recently I was working on a networking class and this error is breaking everything.
If you add Thread.Sleep(1) after Send() call then "TCP Bug detected" doesnt get executed but its not a reliable fix.
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Mar 27, 2014
I am trying to make a streambuf for a socket, which will use either WinSock or POSIX sockets depending on OS. I understand about how to send and receive data via sockets, but I don't really understand how to put that into a 'streambuf'. What functions do I need to override?
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Nov 21, 2013
send(sConnect, (userinput, key), 256, 0);
sConnect is already predefined as a socket
Key is a character array of [32]
Userinput is a character array of [256]
How can you send both of them at the same time using the send function without having to create a separate connection?
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Jul 28, 2013
when I want to use the same socket connected to the host to send() and recv() for the second time, recv() will return 0 without anything in buffer. Basically I am doing:
1. connect to the website
2. send packets
3. receive packets
4. send packets again (I think this one is working since it's not giving me SOCKET_ERROR)
5. receive packets again (this one is returning 0 so as "connection closed")
source code: [URL] ....
as you can see, I have sock2, which when I use for second send/recv it's working fine, however I will do more communication, and having sockets for all of that and connecting them.
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Dec 26, 2014
I have Build code for sending/receiving TCP Traffic over c Socket . Now I want t add HTTP Protocol to it .
After searching out on google ,one method I found which is by GET method to send a query to a server like google.com and request a page .
But ,Suppose I saved a HTML page in my directory how can I send HTTP packet via client/server in socket using this HTML page .
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Aug 6, 2014
I am trying to send yahoo mail using socket program.
Using the commands like ehlo, starttls, auth login, data,.,quit.
but starttls is error. yahoo close itself. one more thing i use this same method for gmail is working.
The problem is we must enable the ssl authentication. Like System.net mail in .net package smtp.enablessl=true. how i enable ssl authentication in starttls in c++ program
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Dec 27, 2014
I have code for sending/receiving TCP traffic over C socket. Now I want to add HTTP protocol to it. After searching the web, one method I found which is by GET method to send a query to a server like google.com and request a page.
But, suppose I saved a HTML page in my directory how can I send HTTP packet via client/server in socket using this HTML page.
Server side code:
sockfd = socket(AF_INET, SOCK_STREAM, 0);
bind(sockfd, (struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0)
listen(sockfd,5);
newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr,&clilen);
while (1)
[Code] .....
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Dec 18, 2014
I am trying to test my client-server socket program wherein the client connects to the server,client sends a message, server receives it and echo back to the client.So far, in the program server receives the message from the client, prints it BUT when it tries to send the message back to the client it shows an error.
sendto(): Invalid argument.I am new to socket programming.
Code:
//Server
#include<stdio.h> //printf
#include<string.h> //memset
#include<stdlib.h> //exit(0)
#include<netinet/in.h>
#include<sys/socket.h>
#define BUFLEN 512 //Max length of buffer
#define PORT 10003 //The port on which to listen for incoming data
}
[code]....
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Oct 6, 2013
My code is:
#include <iostream>
#include <string>
#include <cstdlib>
[Code]....
The problem is that the images don't display and the window doesn't respond.
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Jan 29, 2014
I'm attempting to write a little UDP socket library in c++ on linux so a user can just create a new instance of a UDPSocket class, specify destination ip and port, and just connect. Then the user should be able to call send() or receive() in any order they want.. and here I encounter a little problem..
Most of the tutorials for udp socket sending out there include a bind() call when you create your "server" that is supposed to receive data, but the code that send data does not need one. Because I also want my library to support unicast/broadcast/multicast, I have read that I need to set the socket option SO_REUSEADDR on my sockets (since multiple sockets will need to be connected to same destination IP/port for broadcast/multicast)
My question is.. do I need to create 2 socket handles per "UDPSocke in order to make this work? One for sending and one for receiving data? In my code when I try to work with only 1 socket, it is only able to receive stuff from itself on unicast.. Or should I just remove the SO_REUSEADDR when in unicast mode, then try to bind with both sockets, accept that the bind will only work on the 1st socket, and take it from there?
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May 18, 2014
I want to apply program to send matrix from client and server ,and return back a processed matrix ..
How I can do it using UDP ,it was easy to use tcp for that!?
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Dec 18, 2014
Verify my Method . I am not getting expected output ..
Code:
int Amount=500;
send(newSocket,Amount,4,0);
close(welcomeSocket);
recv(clientSocket,Amount,4,0);
// Amount= ntohl(Amount);
printf("Data received: %d",atoi(Amount[0]));
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May 22, 2013
I am trying to send a packet across a client/server communication. I am getting a seg fault (while running the program(It compiles fine)) when I try to read the neighbor file, You should be able to see this below the comment /***** Read neighbor file***/ :
Code:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
}
[code]....
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Feb 19, 2013
I'm having a bit of trouble learning how to multithread a socket server. I have everything working perfectly fine, but it only accepts one client (I would like multiple clients). some sort of example (I have troubles understanding some things, unless its visual).
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Dec 17, 2014
get some opinions on, or established methods on how your buffer size should be decided.
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Feb 7, 2014
I have some paper work to do about a game I should be able to play with my class mates. We should be able to send and recive a struct concerning about the 'moves' of the pieces at the game. This struct is made of 4 ints, simple as that.
I had a previous paper work to do where I'd have to send ints and that was ok, but now that I have to send a struct I'm failing to do so. This is What I've tried:
//SERVER
struct message{
int code;
int piece;
int x;
int y;
}send;
bytes_sent=write(new_socket,&send,sizeof(message));
cout<<bytes_sent;
So far so good, I see 16 as bytes_sent's value.
On the other hand:
//CLIENT
struct message{
int code;
int piece;
int x;
int y;
}recive;
bytes_recvd=read(my_socket,&recive,sizeof(message));
cout<<bytes_recvd;
I always see 0 as the bytes_recvd's value.
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Jan 29, 2015
What's the best performance library for loading images in PNG?
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Feb 21, 2013
I want to import images in my program and what function I will use.
Compiler: Turboc 3.0
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Apr 8, 2013
I don't mean how do I load a bmp, I mean how does SDL manage to do this?
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Jun 9, 2013
Since SDL doesn't have it's own function for rotating images and I'm tired of storing multiple angles of the same sprite in a file, I created my own function for doing so:
//XY Class
class XY {
public:
XY(){}
XY(float x, float y);
[Code] ....
The problem is while Spin does spin the surface correctly, some pixels are rotated to the same new position so gaps appear in the returned surface. I need a way of filling in the gaps so the returned image looks better. A link to a program I made that uses this function is below so you can see the problem that I'm talking about. [URL] ....
I currently use SDL 1.2. Could my problem be fixed if I used 2.0? For example, does SDL 2.0 have a built in function for rotating surfaces?
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Feb 16, 2014
RLE(Run Length Encoding)
using namespace std;
class Bitwriter{
private:
[Code]....
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May 3, 2013
I have a database of images and I want to store paths of all those images to a text file (lets say "images.txt"). I can then use this text file in c++ to extract images one by one by using getline() in a loop.
I don't know how to store image paths to a text file.
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Nov 24, 2014
I want to store the images in folder.... but I don't know how to do it
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Sep 10, 2013
The question is pretty simple. I'd like to integrate an image into a C++ program.
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Jul 3, 2014
I am working on application to work with images. How to open/read images, whether it is jpeg, png, bmp or tiff and get it to bitmap. Is there some universal command for this or I will need more commands, every time testing the extension or format and then to use different method to read the image? Best would be to do it automatically, but I don't know such command.
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