[C ++ cUrl通过api将图像爱好者发送到电报机器人

问题描述 投票：0回答：1

我正在尝试使用c ++将带有cUrl的图像buff发送到电报API。只是知道我在Windows 10上进行开发。

这是我所做的全部。

首先，我使用以下命令从终端使用curl从硬盘驱动器发送照片：

curl -s -X POST "https://api.telegram.org/bottoken/sendPhoto" -F chat_id=id -F photo="@D:/a.jpg"

在电报聊天中，我同时收到带有此命令的照片，而在我发出cUrl请求的控制台上，我有这样的响应：

{"ok":true,"result":{"message_id":2398,"from":{"id":id,"is_bot":true,"first_name":"botname","username":"stuff"},"chat":{"id":chatid,"first_name":"userdata","username":"userdata","type":"private"},"date":1588929212,"photo":[{"file_id":"reallylongfileid","file_unique_id":"shorterid","file_size":26307,"width":240,"height":320}]}}

如果我使用“导入”选项卡导入该请求并在Postman中选择原始文本并执行，我将收到以下响应：

{
    "ok": false,
    "error_code": 400,
    "description": "Bad Request: wrong HTTP URL specified"
}

如果我尝试使用邮递员生成的代码：

CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
  // I added CURLOPT_VERBOSE 
  curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
  curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
  curl_easy_setopt(curl, CURLOPT_URL, "https://api.telegram.org/bottoken/sendPhoto");
  curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
  curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
  struct curl_slist *headers = NULL;
  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
  curl_mime *mime;
  curl_mimepart *part;
  mime = curl_mime_init(curl);
  part = curl_mime_addpart(mime);
  curl_mime_name(part, "chat_id");
  curl_mime_data(part, "mychatid", CURL_ZERO_TERMINATED);
  part = curl_mime_addpart(mime);
  curl_mime_name(part, "photo");
  curl_mime_data(part, "@D:/a.jpg", CURL_ZERO_TERMINATED);
  curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
  res = curl_easy_perform(curl);
  curl_mime_free(mime);
}
curl_easy_cleanup(curl);

我在控制台上收到此回复：

*   Trying 149.154.167.220...
* TCP_NODELAY set
* Connected to api.telegram.org (149.154.167.220) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* SSL certificate problem: self signed certificate in certificate chain
* Closing connection 0

所以我将此选项添加到了我之前编写的代码中：

curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);

新的响应是：

*   Trying 149.154.167.220...
* TCP_NODELAY set
* Connected to api.telegram.org (149.154.167.220) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: OU=Domain Control Validated; CN=api.telegram.org
*  start date: Mar 24 13:48:17 2020 GMT
*  expire date: May 23 16:17:38 2022 GMT
*  subjectAltName: host "api.telegram.org" matched cert's "api.telegram.org"
*  issuer: C=US; ST=Arizona; L=Scottsdale; O=GoDaddy.com, Inc.; OU=http://certs.godaddy.com/repository/; CN=Go Daddy Secure Certificate Authority - G2
*  SSL certificate verify result: self signed certificate in certificate chain (19), continuing anyway.
> POST /botmybottoken/sendPhoto HTTP/1.1
Host: api.telegram.org
Accept: */*
Content-Length: 254
Content-Type: multipart/form-data; boundary=------------------------9b6fc10336ea9470

* We are completely uploaded and fine
* old SSL session ID is stale, removing
< HTTP/1.1 400 Bad Request
< Server: nginx/1.16.1
< Date: Fri, 08 May 2020 09:25:10 GMT
< Content-Type: application/json
< Content-Length: 83
< Connection: keep-alive
< Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
< Access-Control-Allow-Origin: *
< Access-Control-Expose-Headers: Content-Length,Content-Type,Date,Server,Connection
<
{"ok":false,"error_code":400,"description":"Bad Request: wrong HTTP URL specified"}* Connection #0 to host api.telegram.org left intact
* Closing connection 0

如果我尝试发送此图像缓冲区：

    cv::Mat img(260, 301, CV_8UC3, cv::Scalar(0, 0, 0));
    std::vector<uchar> buff;
    std::vector<int> param(2);
    param[0] = cv::IMWRITE_JPEG_QUALITY;
    param[1] = 80;

    cv::imencode(".jpg", img, buff, param);
    std::string strImg((char*)buff.data(), buff.size());

并且如果我仅从此修改请求代码：

  curl_mime_data(part, "@D:/a.jpg", CURL_ZERO_TERMINATED);

为此：

  curl_mime_data(part, strImg.data(), strImg.size());

我在控制台中收到此响应：

*   Trying 149.154.167.220...
* TCP_NODELAY set
* Connected to api.telegram.org (149.154.167.220) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: OU=Domain Control Validated; CN=api.telegram.org
*  start date: Mar 24 13:48:17 2020 GMT
*  expire date: May 23 16:17:38 2022 GMT
*  subjectAltName: host "api.telegram.org" matched cert's "api.telegram.org"
*  issuer: C=US; ST=Arizona; L=Scottsdale; O=GoDaddy.com, Inc.; OU=http://certs.godaddy.com/repository/; CN=Go Daddy Secure Certificate Authority - G2
*  SSL certificate verify result: self signed certificate in certificate chain (19), continuing anyway.
> POST /botmybottoken/sendPhoto HTTP/1.1
Host: api.telegram.org
Accept: */*
Content-Length: 2164
Content-Type: multipart/form-data; boundary=------------------------f5bde0e2e0ef8114
Expect: 100-continue

* old SSL session ID is stale, removing
< HTTP/1.1 100 Continue
* We are completely uploaded and fine
< HTTP/1.1 400 Bad Request
< Server: nginx/1.16.1
< Date: Fri, 08 May 2020 09:30:34 GMT
< Content-Type: application/json
< Content-Length: 128
< Connection: keep-alive
< Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
< Access-Control-Allow-Origin: *
< Access-Control-Expose-Headers: Content-Length,Content-Type,Date,Server,Connection
<
{"ok":false,"error_code":400,"description":"Bad Request: wrong remote file identifier specified: Wrong character in the string"}* Connection #0 to host api.telegram.org left intact
* Closing connection 0

我不想使用任何c ++电报bot库，因为我只需要发送一条消息或一张照片。我可以发送包含cUrl代码的消息。有了照片，我遇到了一些问题。因为我必须执行这两个简单的操作，所以我更喜欢仅使用cUrl，而不使用其他任何内容。我需要帮助，因为我不明白怎么了。我知道我写了很多书，但我希望这可以帮助您更好，更快地理解所有内容。

谢谢！

c++ http curl post telegram
1个回答
0
投票
int sendTelegramPhoto(string chat_id, string path_to_photo, string caption = NULL){
    CURL *curl;
    CURLcode response;
    curl_global_init(CURL_GLOBAL_ALL);
    curl = curl_easy_init();
    if (curl)
    {
        curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
        curl_easy_setopt(curl, CURLOPT_POST, 1);
        curl_easy_setopt(curl, CURLOPT_URL,     "https://api.telegram.org/bottoken/sendPhoto");
        curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
        struct curl_slist *headers = NULL;
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        curl_slist_append(headers, "Content-Type: multipart/form-data");
        curl_slist_append(headers, "charset=utf-8");
        curl_mime *mime;
        curl_mimepart *part;
        mime = curl_mime_init(curl);
        part = curl_mime_addpart(mime);
        curl_mime_name(part, "chat_id");
        curl_mime_data(part, chat_id.c_str(), CURL_ZERO_TERMINATED);
        part = curl_mime_addpart(mime);
        curl_mime_name(part, "photo");
        curl_mime_filedata(part, path_to_photo.c_str());
        curl_mime_type(part, "image/jpeg");
        part = curl_mime_addpart(mime);
        curl_mime_name(part, "caption");
        curl_mime_data(part, caption.c_str().c_str(), CURL_ZERO_TERMINATED);
        curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
        response = curl_easy_perform(curl);
        curl_mime_free(mime);
        curl_slist_free_all(headers);
    }
    curl_easy_cleanup(curl);
    return 0;
}
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