Question

用socket怎么获得javaWeb返回的json

Answer 1

用socket获得javaWeb返回的json的方法：
1、编写客户端解析json的方法client.c代码如下：
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <json/json.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

int main()
{
/* all previous code until
printf("Size of string- %lu\n", sizeof(json_object_to_json_string(jobj)))*/

char temp_buff[MAX_SIZE];

if (strcpy(temp_buff, json_object_to_json_string(jobj)) == NULL)
{
perror("strcpy");
return EXIT_FAILURE;
}

if (write(fd, temp_buff, strlen(temp_buff)) == -1)
{
perror("write");
return EXIT_FAILURE;
}

printf("Written data\n");
return EXIT_SUCCESS;
}
2、服务端生成json的server.c代码：
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <json/json.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

int main()
{
/* all previous code until
printf("Reading from client\n"); */

ssize_t r;

char buff[MAX_SIZE];

for (;;)
{
r = read(connfd, buff, MAX_SIZE);

if (r == -1)
{
perror("read");
return EXIT_FAILURE;
}
if (r == 0)
break;

printf("READ: %s\n", buff);
}

return EXIT_SUCCESS;
}
其中用json_object_to_json_string把服务端返回的json对象转换成json字符串，传入解析器进行读取。

Answer 2

字符流？
InputStream is=socket.getInputStream();