cjson 使用时遇到的问题找不到库
git clone https://github.com/DaveGamble/cJSON.git
sudo cp -R cJSON/ /usr/include/
遇到的问题
好像需要编译 make make install 然后再拷贝到 下面的路径
mkdir -p /usr/lib /usr/include/cjson
cp -a cJSON.h /usr/include/cjson
cp -a libcjson.so libcjson.so.1 libcjson.so.1.7.0 /usr/lib
cp -a cJSON_Utils.h /usr/include/cjson
cp -a libcjson_utils.so libcjson_utils.so.1 libcjson_utils.so.1.7.0 /usr/lib
#include
#include
#include
#include
#include
//#define POSTURL "http://www.xiami.com/member/login"
#define POSTURL "http://192.168.169.1:10099/reg"
#define POSTFIELDS "username=dsb12&password=1"
#define FILENAME "curlposttest.log"
//解决办法 动态数组 控制buf的大小
typedef struct UserData
{
char* buf;
int len;// alloc
int used; // used length realloc:
}UserData;
struct curl_slist* headers = NULL;
UserData d;
size_t write_data(void* buffer,size_t size,size_t nmemb,void *stream)
{
memcpy(d.buf+d.len, buffer, size*nmemb);
//strcpy(d.buf+d.len, buffer, size*nmemb);
d.len += size*nmemb;
FILE *fptr = (FILE*)stream;
fwrite(buffer,size,nmemb,fptr);
return size*nmemb;
}
int main(int argc,char *argv[])
{
CURL *curl;
CURLcode res;
FILE* fptr;
struct curl_slist *http_header = NULL;
if ((fptr = fopen(FILENAME,"w")) == NULL)
{
fprintf(stderr,"fopen file error:%s\n",FILENAME);
return -1;
}
char username[1024];
fgets(username, sizeof(username), stdin);
username[strlen(username)-1]=0;
char password[1024];
fgets(password, sizeof(password), stdin);
password[strlen(password)-1] = 0;
/*
{
username: username,
password: password
}
{}
*/
cJSON* json = cJSON_CreateObject();
cJSON_AddItemToObject(json, "username", cJSON_CreateString(username));
cJSON_AddItemToObject(json, "password", cJSON_CreateString(password));
char* json_buf = cJSON_Print(json);
printf("%s\n", json_buf);
d.buf=(char*)malloc(8192);
curl = curl_easy_init();
if (!curl)
{
fprintf(stderr,"curl init failed\n");
return -1;
}
curl_easy_setopt(curl,CURLOPT_URL,POSTURL); //url地址
// curl_easy_setopt(curl,CURLOPT_POSTFIELDS,POSTFIELDS); //post参数
curl_easy_setopt(curl,CURLOPT_POSTFIELDS,json_buf); //post参数 不需要统>计长度 因为json是字符串
curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,write_data); //对返回的数据进行操作的函数地址
curl_easy_setopt(curl,CURLOPT_WRITEDATA,fptr); //这是write_data的第四个参数值
curl_easy_setopt(curl,CURLOPT_POST,1); //设置问非0表示本次操作为post
curl_easy_setopt(curl,CURLOPT_VERBOSE,1); //打印调试信息
headers=curl_slist_append(headers, "Content-Type:application/json;charset=UTF-8");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
// curl_easy_setopt(curl,CURLOPT_HEADER,1); //将响应头信息和相应体一起传给write_data
curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,1); //设置为非0,响应头信息location
//curl_easy_setopt(curl,CURLOPT_COOKIEFILE,"/Users/zhu/CProjects/curlposttest.cookie");
res = curl_easy_perform(curl);
printf("============");
printf("%d\n",res);
printf("============");
if (res != CURLE_OK)
{
switch(res)
{
case CURLE_UNSUPPORTED_PROTOCOL:
fprintf(stderr,"不支持的协议,由URL的头部指定\n");
case CURLE_COULDNT_CONNECT:
fprintf(stderr,"不能连接到remote主机或者代理\n");
case CURLE_HTTP_RETURNED_ERROR:
fprintf(stderr,"http返回错误\n");
case CURLE_READ_ERROR:
fprintf(stderr,"读本地文件错误\n");
default:
fprintf(stderr,"返回值:%d\n",res);
}
return -1;
}
curl_slist_free_all(headers); /* free the list again */
curl_easy_cleanup(curl);
printf("%s\n",d.buf);
}