这个是我写的实现传送图片的的过程，header成功传递，浏览器能读出文件大小，可是无法访问图片，是读写的过程出了问题吗？
void sendJPG(int *sock, char *filename) {
int client_sock = *sock;
char buffer[buffer_size];
FILE *fp;
FILE *fw;
fp = fopen(filename, "rb");
fseek(fp, 0L, SEEK_END);
int len = ftell(fp);
string status = "HTTP/1.1 200 OK\r\n";
string header = "Server: A Simple Web Server\r\nContent-Type: image/jpeg\r\n";
header += "Content-Range: bytes ";
header += to_string(0);
header += "-";
header += to_string(len - 1);
header += "/";
header += to_string(len);
header += "\r\n";
header += "Content-Length: ";
header += to_string(len);
header += "\r\n\r\n";
write(client_sock, status.c_str(), status.length());
write(client_sock, header.c_str(), header.length());
if (NULL == fp) {
sendError(sock);
close(client_sock);
handleError("open file failed");
return;
}
printf("Sending img\n");
fw = fdopen(client_sock, "w");
fread(buffer, sizeof(char), sizeof(buffer), fp);
while (!feof(fp)) {
fwrite(buffer, sizeof(char), sizeof(buffer), fw);
fread(buffer, sizeof(char), sizeof(buffer), fp);
}
printf("Finish sending\n");
fclose(fw);
fclose(fp);
close(client_sock);
}