如何将 JSON 数据发送到 REST API?

我正在使用C++中的libcurl和WooCommerce REST API安装WooCommerce插件将数据发送到Wordpress站点。数据似乎已发送，但预期结果未显示在网站上。其目的是更新(修改)产品。我的代码基于WooCommerce文档，可在此处找到。

我已经设法在单独的txt文件中从程序中获取CURLOPT_VERBOSE文本。

这是我使用 cURL 的C++代码：

std::string URL = main_domain + "wp-json/wc/v3/products/" + product_id + "?consumer_key=" + consumer_key + "&consumer_secret=" + consumer_secret;
curl_slist* headers = NULL;
headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
headers = curl_slist_append(headers, "Accept:application/json");
headers = curl_slist_append(headers, "Content-Type:application/json");
headers = curl_slist_append(headers, "charsets: utf-8");
// log file
FILE* filep = fopen("logfichier.txt", "w");
std::string toUpdate = "{"id":"" + product_id + ","name":"" + product_name + "","description":"" + product_description + "","price":"" + product_price + ""}";
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
if (curl) {
readBuffer = "";
curl_easy_setopt(curl, CURLOPT_URL, URL.c_str());
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT"); 
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, toUpdate.c_str());
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, toUpdate.length());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
curl_easy_setopt(curl, CURLOPT_STDERR, filep);
res = curl_easy_perform(curl);
// Check for errors
if (res != CURLE_OK) {
// error handling and cleanup           
}
else {
// code and cleanup
}
}
else {
// error handling and cleanup
}

我从字面上放了互联网上找到的每个标题，这些标题似乎与我试图在我的代码中完成的内容相关。 这是返回的调试文本：

* STATE: INIT => CONNECT handle 0x10870278; line 1428 (connection #-5000)
* Added connection 0. The cache now contains 1 members
* STATE: CONNECT => WAITRESOLVE handle 0x10870278; line 1464 (connection #0)
*   Trying 192.XX.XX.XX...
* TCP_NODELAY set
* STATE: WAITRESOLVE => WAITCONNECT handle 0x10870278; line 1545 (connection #0)
* Connected to mywebsite.com (192.XX.XX.XX) port 443 (#0)
* STATE: WAITCONNECT => SENDPROTOCONNECT handle 0x10870278; line 1599 (connection #0)
* Marked for [keep alive]: HTTP default
* schannel: SSL/TLS connection with mywebsite.com port 443 (step 1/3)
* schannel: checking server certificate revocation
* schannel: sending initial handshake data: sending 176 bytes...
// (here was just a bunch of connexion attemps log text...)
* schannel: SSL/TLS handshake complete
* schannel: SSL/TLS connection with mywebsite.com port 443 (step 3/3)
* schannel: stored credential handle in session cache
* STATE: PROTOCONNECT => DO handle 0x10870278; line 1634 (connection #0)
> PUT /wp-json/wc/v3/products/111867?consumer_key=(the actual key)&consumer_secret=(the actual secret) HTTP/1.1
Host: mywebsite.com
Transfer-Encoding: chunked
Accept:application/json
Content-Type:application/json
charsets: utf-8

4b
* upload completely sent off: 82 out of 75 bytes
* STATE: DO => DO_DONE handle 0x10870278; line 1696 (connection #0)
* STATE: DO_DONE => WAITPERFORM handle 0x10870278; line 1823 (connection #0)
* STATE: WAITPERFORM => PERFORM handle 0x10870278; line 1838 (connection #0)
* schannel: client wants to read 16384 bytes
* schannel: encdata_buffer resized 17408
* schannel: encrypted data buffer: offset 0 length 17408
// (a few decrypting data attempts...)
* schannel: decrypted data returned 536
* schannel: decrypted data buffer: offset 0 length 16384
* HTTP 1.1 or later with persistent connection, pipelining supported
< HTTP/1.1 200 OK
< Date: Tue, 18 Jun 2019 15:27:42 GMT
* Server Apache is not blacklisted
< Server: Apache
< X-Robots-Tag: noindex
< Link: <https://mywebsite.com/wp-json/>; rel="https://api.w.org/"
< X-Content-Type-Options: nosniff
< Access-Control-Expose-Headers: X-WP-Total, X-WP-TotalPages
< Access-Control-Allow-Headers: Authorization, Content-Type
< Expires: Wed, 11 Jan 1984 05:00:00 GMT
< Cache-Control: no-transform, no-cache, must-revalidate, max-age=0
< Allow: GET, POST, PUT, PATCH, DELETE
< Transfer-Encoding: chunked
< Content-Type: application/json; charset=UTF-8
< 
* schannel: client wants to read 16384 bytes
* schannel: encrypted data buffer: offset 835 length 17408
// (a few decrypting data attempts...)
* schannel: decrypted data returned 1986
* schannel: decrypted data buffer: offset 0 length 16384
* STATE: PERFORM => DONE handle 0x10870278; line 2011 (connection #0)
* multi_done
* Connection #0 to host axanti.info left intact

我从原文中删除了一些多余的部分，并保留了我认为是主要信息的内容。似乎我的 JSON 数据实际上已发送到服务器，但预期结果没有显示在我的网站上(产品应该修改，但实际上没有)。 这段代码有什么可能错的吗？还是问题出在服务器端？因为我经常应用官方文档中提到的相同内容。