使用openid怎么拿到用户信息代码提供
时间: 2023-04-06 08:01:57 浏览: 227
您可以使用以下代码来获取用户信息:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include <json-c/json.h>
#define APPID "your_appid"
#define SECRET "your_secret"
struct MemoryStruct {
char *memory;
size_t size;
};
static size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp) {
size_t realsize = size * nmemb;
struct MemoryStruct *mem = (struct MemoryStruct *)userp;
char *ptr = realloc(mem->memory, mem->size + realsize + 1);
if(ptr == NULL) {
printf("Not enough memory (realloc returned NULL)\n");
return 0;
}
mem->memory = ptr;
memcpy(&(mem->memory[mem->size]), contents, realsize);
mem->size += realsize;
mem->memory[mem->size] = 0;
return realsize;
}
char *get_access_token() {
CURL *curl;
CURLcode res;
struct MemoryStruct chunk;
chunk.memory = malloc(1);
chunk.size = 0;
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
if(curl) {
char url[256];
sprintf(url, "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s", APPID, SECRET);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
res = curl_easy_perform(curl);
if(res != CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
else {
json_object *jobj = json_tokener_parse(chunk.memory);
json_object *access_token_obj;
json_object_object_get_ex(jobj, "access_token", &access_token_obj);
const char *access_token = json_object_get_string(access_token_obj);
char *result = strdup(access_token);
json_object_put(jobj);
free(chunk.memory);
curl_easy_cleanup(curl);
curl_global_cleanup();
return result;
}
}
free(chunk.memory);
curl_easy_cleanup(curl);
curl_global_cleanup();
return NULL;
}
char *get_user_info(const char *openid) {
CURL *curl;
CURLcode res;
struct MemoryStruct chunk;
chunk.memory = malloc(1);
chunk.size = 0;
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
if(curl) {
char url[256];
char *access_token = get_access_token();
sprintf(url, "https://api.weixin.qq.com/cgi-bin/user/info?access_token=%s&openid=%s&lang=zh_CN", access_token, openid);
free(access_token);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
res = curl_easy_perform(curl);
if(res != CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
else {
json_object *jobj = json_tokener_parse(chunk.memory);
char *result = strdup(json_object_to_json_string(jobj));
json_object_put(jobj);
free(chunk.memory);
curl_easy_cleanup(curl);
curl_global_cleanup();
return result;
}
}
free(chunk.memory);
curl_easy_cleanup(curl);
curl_global_cleanup();
return NULL;
}
int main(int argc, char **argv) {
char *openid = "your_openid";
char *user_info = get_user_info(openid);
printf("%s\n", user_info);
free(user_info);
return 0;
}
```
其中,APPID 和 SECRET 需要替换成你自己的应用ID和密钥。使用 get_access_token 函数获取访问令牌,然后使用 get_user_info 函数获取用户信息。在 get_user_info 函数中,将 openid 替换为你要获取信息的用户的openid。函数返回一个 JSON 字符串,包含用户信息。