How to Upload an SQLite Database to a PHP Server Using HTTP POST Multipart/Form-Data?

Using HTTP POST Multipart/Form-Data to Upload SQLite Databases to a PHP Server

This guide details how to upload an SQLite database file to a PHP server using an HTTP POST request with the multipart/form-data content type, including a "userid" string parameter.

Steps:

First, initialize a cURL session:

<code class="language-c">CURL *curl = curl_easy_init();</code>

Next, set the request URL and specify the POST method:

<code class="language-c">curl_easy_setopt(curl, CURLOPT_URL, "http://www.myserver.com/upload.php");
curl_easy_setopt(curl, CURLOPT_POST, 1);</code>

Now, construct the multipart/form-data structure:

<code class="language-c">curl_mime *mime = curl_mime_init(curl);
curl_mimepart *part = curl_mime_addpart(mime);</code>

Set the database file data:

<code class="language-c">curl_mime_data(part, fileBytes, fileBytesLength);</code>

Specify the file name and MIME type:

<code class="language-c">curl_mime_name(part, "userfile");
curl_mime_type(part, "application/octet-stream");</code>

Include the "userid" parameter:

<code class="language-c">curl_mimepart *part2 = curl_mime_addpart(mime);
curl_mime_data(part2, "userid=SOME_ID", strlen("userid=SOME_ID"));</code>

Attach the multipart data to the cURL request:

<code class="language-c">curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);</code>

Finally, execute the request and handle the response:

<code class="language-c">CURLcode response_code = curl_easy_perform(curl);
if (response_code != CURLE_OK) {
    // Handle cURL errors
}</code>

Important Considerations:

• Your PHP server-side script (upload.php) must be configured to handle multipart/form-data POST requests.
• Robust error handling is crucial. Consult the libcurl documentation for detailed error codes and implement appropriate error handling mechanisms. Consider using a higher-level library to simplify HTTP request management.

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