c 用戶端並發傳輸xml給伺服器端解析1

///////////////////////////////////////////////////////////////////////////////////
// multi_thread_client.c
///////////////////////////////////////////////////////////////////////////////////

//gcc -I/usr/include/libxml2 -o multi_thread_server multi_thread_server.c -lxml2 -lpthread
//-lxml2 引入xml庫

//-lpthread 引入多線程庫

//-I/usr/include/libxml2 指定路徑
//本檔案是客戶機多線程多次重複與服務互動的代碼
#include <netinet/in.h>    // for sockaddr_in
#include <sys/types.h>    // for socket
#include <sys/socket.h>    // for socket
#include <stdio.h>        // for printf
#include <stdlib.h>        // for exit
#include <string.h>        // for bzero
#include <pthread.h>
#include <sys/errno.h>    // for errno

#include <unistd.h> //define close
#define HELLO_WORLD_SERVER_PORT    6666
#define BUFFER_SIZE 1024
//#include <libxml/parser.h>
// #include <libxml/tree.h>
char * server_IP = NULL;

void * talk_to_server(void * thread_num)
{
    //設定一個socket地址結構client_addr,代表客戶機internet地址, 連接埠
    struct sockaddr_in client_addr;
    bzero(&client_addr,sizeof(client_addr)); //把一段記憶體區的內容全部設定為0
    client_addr.sin_family = AF_INET;    //internet協議族
    client_addr.sin_addr.s_addr = htons(INADDR_ANY);//INADDR_ANY表示自動擷取本機地址
    client_addr.sin_port = htons(0);    //0表示讓系統自動分配一個空閑連接埠
    //建立用於internet的流協議(TCP)socket,用client_socket代表客戶機socket

int client_socket=0;
int length=0;
    if (( client_socket = socket(AF_INET,SOCK_STREAM,0)) == -1)
    {
        printf("Create Socket Failed!\n");
        exit(1);
    }
    //把客戶機的socket和客戶機的socket地址結構聯絡起來
    if( bind(client_socket,(struct sockaddr*)&client_addr,sizeof(client_addr)))
    {
        printf("Client Bind Port Failed!\n");
        exit(1);
    }

    //設定一個socket地址結構server_addr,代表格服務器的internet地址, 連接埠
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    //inet_aton比起inet_addr來，可以通過傳回值檢測IP是否有效
    if(inet_aton(server_IP,&server_addr.sin_addr) == 0) //伺服器的IP地址來自程式的參數
    {
        printf("Server IP Address Error!\n");
        exit(1);
    }
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
    socklen_t server_addr_length = sizeof(server_addr);
    //向伺服器發起串連,串連成功後client_socket代表了客戶機和伺服器的一個socket串連
    if(connect(client_socket,(struct sockaddr*)&server_addr, server_addr_length) < 0)
    {
        printf("Can Not Connect To %s!\n",server_IP);
        exit(1);
    }

    char buffer[BUFFER_SIZE];
    bzero(buffer,BUFFER_SIZE);
    //從伺服器接收資料到buffer中
    if (( length = recv(client_socket,buffer,BUFFER_SIZE,0)) < 0)
    {
        printf("Recieve Data From Server %s Failed!\n", server_IP);
        exit(1);
    }
    printf("From Server %s :\t%s",server_IP,buffer);

    bzero(buffer,BUFFER_SIZE);
    sprintf(buffer,"Hello, World! From Client Thread NUM :\t%d\n",(int)thread_num);
    //向伺服器發送buffer中的資料
char bf[] ="<?xml version='1.0' encoding='UTF-8'?><root><yuwen>80</yuwen> <shuxue>100</shuxue></root>";
    send(client_socket,bf,BUFFER_SIZE,0);
    //關閉socket
    close(client_socket);
    pthread_exit(NULL);
}

int main(int argc, char **argv)
{
    if (argc != 2)
    {
        printf("Usage: ./%s ServerIPAddress\n",argv[0]);
        exit(1);
    }
    server_IP = argv[1];
    pthread_t child_thread;
    pthread_attr_t child_thread_attr;
    pthread_attr_init(&child_thread_attr);
    pthread_attr_setdetachstate(&child_thread_attr,PTHREAD_CREATE_DETACHED);
    int i=0;
    for(i=0; i<10000; i++)
    {
        if( pthread_create(&child_thread,&child_thread_attr,talk_to_server, (void *)i) < 0 )
            printf("pthread_create Failed : %s\n",strerror(errno));
    }

    return 0;
}