如何将JSON数据发送到REST API？

Question

我在C++中使用libcurl和WooCommerce REST API安装了WooCommerce插件，并将数据发送到Wordpress站点。数据似乎已经发送，但网站上没有显示预期的结果。它的目的是更新(修改)产品。我的代码基于here的WooCommerce文档。

我已经设法从程序中获得了一个单独的txt文件中的CURLOPT_VERBOSE文本。

下面是我使用cURL编写的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
    }

我真的把在互联网上找到的每一个头文件都放在我的代码中，看起来与我想要完成的内容相关。以下是返回的调试文本：

* 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

我从原文中去掉了一些多余的部分，并保留了我认为是主要信息的部分。似乎我的JSON数据实际上被发送到了服务器，但是预期的结果并没有显示在我的网站上(一个产品应该被修改，但实际上没有)。这段代码有没有可能是错误的？或者问题出在服务器端？因为我很少使用官方文档中提到的东西。

Answer 1

看起来你的有效载荷已经关闭了。id部分是多余的，因为您已经通过URL指定了要更新的产品，所以您可以删除它。此外，您正在尝试错误地设置价格。根据REST文档，您需要使用regular_price属性而不是price (price是只读的)。正确的有效负载应如下所示：

{
    name: 'My product name',
    description: 'my product description',
    regular_price' : '3.50',
}