175 lines
6.3 KiB
HTML
175 lines
6.3 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Client request for a file" />
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<meta name="abstract" content="This example enables a client to request a file from the server and to wait for the server to send the contents of that file back." />
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<meta name="description" content="This example enables a client to request a file from the server and to wait for the server to send the contents of that file back." />
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<meta name="DC.Relation" scheme="URI" content="xsendfile.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="x2sendfile" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Client request for a file</title>
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</head>
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<body id="x2sendfile"><a name="x2sendfile"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Client request for a file</h1>
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<div><p>This example enables a client to request a file from the server
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and to wait for the server to send the contents of that file back.</p>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> By using the code examples, you agree to the terms
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of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
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<pre>/*************************************************/
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/* Client example requests file data from server */
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/*************************************************/
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#define SERVER_PORT 12345
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main (int argc, char *argv[])
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{
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int rc, sockfd;
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char filename[256];
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char buffer[32 * 1024];
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struct sockaddr_in addr;
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struct hostent *host_ent;
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/*************************************************/
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/* Initialize the socket address structure */
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/*************************************************/
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(SERVER_PORT);
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/*************************************************/
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/* Determine the host name and IP address of the */
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/* machine the server is running on */
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/*************************************************/
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if (argc < 2)
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{
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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}
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else if (isdigit(*argv[1]))
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{
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addr.sin_addr.s_addr = inet_addr(argv[1]);
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}
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else
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{
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host_ent = gethostbyname(argv[1]);
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if (host_ent == NULL)
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{
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printf("Host not found!\n");
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exit(-1);
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}
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memcpy((char *)&addr.sin_addr.s_addr,
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host_ent->h_addr_list[0],
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host_ent->h_length);
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}
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/**************************************************/
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/* Check to see if the user specified a file name */
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/* on the command line */
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/**************************************************/
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if (argc == 3)
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{
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strcpy(filename, argv[2]);
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}
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else
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{
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printf("Enter the name of the file:\n");
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gets(filename);
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}
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/*************************************************/
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/* Create an AF_INET stream socket */
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/*************************************************/
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sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd < 0)
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{
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perror("socket() failed");
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exit(-1);
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}
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printf("Socket completed.\n");
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/*************************************************/
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/* Connect to the server */
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/*************************************************/
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rc = connect(sockfd,
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(struct sockaddr *)&addr,
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sizeof(struct sockaddr_in));
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if (rc < 0)
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{
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perror("connect() failed");
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close(sockfd);
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exit(-1);
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}
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printf("Connect completed.\n");
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/*************************************************/
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/* Send the request over to the server */
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/*************************************************/
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rc = send(sockfd, filename, strlen(filename) + 1, 0);
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if (rc < 0)
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{
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perror("send() failed");
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close(sockfd);
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exit(-1);
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}
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printf("Request for %s sent\n", filename);
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/*************************************************/
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/* Receive the file from the server */
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/*************************************************/
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do
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{
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rc = recv(sockfd, buffer, sizeof(buffer), 0);
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if (rc < 0)
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{
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perror("recv() failed");
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close(sockfd);
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exit(-1);
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}
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else if (rc == 0)
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{
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printf("End of file\n");
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break;
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}
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printf("%d bytes received\n", rc);
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} while (rc > 0);
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/*************************************************/
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/* Close the socket */
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/*************************************************/
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close(sockfd);
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}</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="xsendfile.htm" title="These examples enable a server to communicate with a client by using the send_file() and accept_and_recv() APIs.">Examples: Transfer file data using send_file() and accept_and_recv() APIs</a></div>
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</div>
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</div>
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</body>
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</html>
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