Telegram 机器人不发送消息

Question

#include <stdio.h>
#include <curl/curl.h>

int main(void) {
    CURL *curl;
    CURLcode response;

    char* token = "wont post my bot token here";
    char* channel_id = "2041832290";
    char* url;

    sprintf(url, "https://api.telegram.org/bot%s/sendMessage", token);
    
    char post_fields[100];
    sprintf(post_fields, "chat_id=%s&text=%s", channel_id, "Hello");

    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_fields);

        response = curl_easy_perform(curl);
        curl_easy_cleanup(curl);

        if (response != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(response));
        }
    }
    
    printf("%s", response);

    return 0;
}

机器人具有管理员权限，在我的电报频道中，我检查了channel_id是否正确300次，我没有任何错误，机器人似乎没有发送任何消息

Answer 1

我不太擅长 C/C++，但我注意到的一些关键缺失部分是：

1. char* url

   在使用前未初始化或分配内存空间。

您可以尝试以下代码吗：

#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>

int main(void)
{
    CURL *curl;
    CURLcode response;

    char *token = "BOT_TOKEN";
    char *channel_id = "CHANNEL_ID";

    // Allocate memory for url
    char *url = (char *)malloc(256);

    sprintf(url, "https://api.telegram.org/bot%s/sendMessage", token);

    char post_fields[100];
    sprintf(post_fields, "chat_id=%s&text=%s", channel_id, "Hello");

    curl = curl_easy_init();
    if (curl)
    {
        curl_easy_setopt(curl, CURLOPT_URL, url);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_fields);

        response = curl_easy_perform(curl);
        curl_easy_cleanup(curl);

        if (response != CURLE_OK)
        {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(response));
        }
    }

    // Free dynamically allocated memory
    free(url);

    return 0;
}

我是这样运行的：

gcc bot.c -o main -lcurl && ./main

希望这有帮助！