我正在尝试使用TCP将客户端的jpg文件发送到服务器。当图片到达服务器端时,我无法打开它,除了收到的图片大小高于发送的图片(发送= 880字节,收到= 894字节)。你们中的任何一个人都知道如何解决这个问题?这里是我的代码:通过TCP发送图片
客户端代码:
static int send_server_image(SOCKET sock){
int n = 0;
int siz = 0;
FILE *picture;
char buf[50];
char *s="";
cout << "Getting image size" << endl;
picture = fopen("C:\\Users\\n.b\\Desktop\\c++\\TCP\\tcp_client_image_pp\\test.jpg", "r");
fseek(picture, 0, SEEK_END);
siz = ftell(picture);
cout << siz << endl; // Output 880
cout << "Sending picture size to the server" << endl;
sprintf(buf, "%d", siz);
if((n = send(sock, buf, sizeof(buf), 0)) < 0)
{
perror("send_size()");
exit(errno);
}
char Sbuf[siz];
cout << "Sending the picture as byte array" << endl;
fseek(picture, 0, SEEK_END);
siz = ftell(picture);
fseek(picture, 0, SEEK_SET); //Going to the beginning of the file
while(!feof(picture)){
fread(Sbuf, sizeof(char), sizeof(Sbuf), picture);
if((n = send(sock, Sbuf, sizeof(Sbuf), 0)) < 0)
{
perror("send_size()");
exit(errno);
}
memset(Sbuf, 0, sizeof(Sbuf));
}
}
服务器代码:
static int recv_client_image(SOCKET sock){
int n = 0;
cout << "Reading image size" << endl;
char buf[50];
int siz = 0;
if ((n = recv(sock, buf, sizeof(buf), 0) <0)){
perror("recv_size()");
exit(errno);
}
siz = atoi(buf);
cout << siz << endl; // 880 output
char Rbuffer[siz];
cout << "Reading image byte array" << endl;
n = 0;
if ((n = recv(sock, Rbuffer, sizeof(Rbuffer), 0)) < 0){
perror("recv_size()");
exit(errno);
}
cout << "Converting byte array to image" << endl;
FILE *image;
image = fopen("recu.jpg", "w");
fwrite(Rbuffer, sizeof(char), sizeof(Rbuffer), image);
fclose(image);
cout << "done" << endl;
}
谢谢。
两个系统(发送者/接收者)是否具有相同的字节序?哪个排序?第一个recv呼叫接收了多少个字节?小于sizeof(buf)?添加更多调试输出或在调试器中运行并提供更多信息。 –