Question

所以我用C编写的基本服务器遇到了问题。每次我尝试向客户端发送少于6个字节时，客户端都不会显示我发送的字节。 send（）调用没有失败。我已经在CURL和Postman上对此进行了测试，但都无法得到答复。

我将程序缩减为相关的位，因此您看到的结构在这里没有任何作用。

#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

void exit_with_error(const char *err);
#define MSG_SIZE            1028

typedef struct list_s
{
    struct list_s *next;
    char *title;
    char *description;
    int id;
} list_t;

int main(void)
{
    char *client_name, msg[MSG_SIZE];
    int server_socket, client_socket, r, id_count = 0, v = 1;
    short server_port = 8080;
    struct sockaddr_in server_addr, client_addr;
    socklen_t client_addr_len;
    list_t *todo_list = NULL;

    server_socket = socket(PF_INET, SOCK_STREAM, 0);
    if (server_socket < 0)
        exit_with_error("socket() failed");
    if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v)) < 0)
        exit_with_error("setsockopt() failed");
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(server_port);
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    if (bind(server_socket, (struct sockaddr *)&server_addr,
        sizeof(server_addr)) < 0)
        exit_with_error("bind() failed");

    if (listen(server_socket, 64) < 0)
        exit_with_error("listen() failed");
    printf("Server listening on port %d\n", server_port);
    fflush(NULL);
    while (1)
    {
        client_addr_len = sizeof(client_addr);
        client_socket = accept(server_socket, (struct sockaddr     *)&client_addr,
            &client_addr_len);
        if (client_socket < 0)
            exit_with_error("accept() failed");
        client_name = inet_ntoa(client_addr.sin_addr);
        printf("%s ", client_name);

        if (send(client_socket, "[", strlen("["), 0) < 0)
            exit_with_error("send() failed");
        close(client_socket);
    }

    close(server_socket);
    return (0);
}

void exit_with_error(const char *err)
{
    fprintf(stderr, "%s\n", err);
    exit(1);
}

Answer 1

我知道了-@DanielStenberg是正确的。显然，一旦我发送了一条带有正确的状态行和内容长度标头的消息，就可以在另一个send（）调用中发送正文数据。

C：如果我一次发送少于6个字节，那么Curl无法接收字节

1 个答案: