Can Reqwest handle multipart form data?

Reqwest is a popular HTTP client for Rust, designed to be ergonomic, lightweight, and easy to use. Reqwest does support multipart form data, which means it can be used for making HTTP requests that include multipart form data, typically used for file uploads and submitting forms that include binary data.

In Rust, you can use Reqwest to build multipart requests by creating a multipart::Form and then attaching it to your request. Here's an example of how you can use Reqwest to send a multipart/form-data POST request:

use reqwest::Client;
use reqwest::multipart;
use std::path::Path;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    // Create the path to the file you want to upload.
    let file_path = Path::new("path/to/your/file.png");

    // Create a form and add fields to it
    let form = multipart::Form::new()
        .text("key", "value") // Add text fields like this
        .file("file", file_path)?; // Add a file like this

    // Send the multipart request
    let response = client.post("http://example.com/upload")
        .multipart(form)
        .send()
        .await?;

    println!("Response: {:?}", response);
    Ok(())
}

In this example: - We use the multipart::Form::new() method to create a new multipart form. - We add a text field to the form with the text method. - We add a file to the form with the file method. This method takes the name of the form field (as expected by the server) and the path to the file you want to upload. - We send the request using the post method of the Reqwest Client, setting the URL to the endpoint that handles the upload. - We attach the form to the request with the multipart method.

Please note that you need to make sure that the server you are sending the request to is expecting multipart form data at the specified endpoint.

Also, since Reqwest is an asynchronous library, make sure to use it within the context of an async runtime like Tokio (as shown in the example with #[tokio::main]), and handle the results and errors properly. The ? operator is used to propagate errors, and you would typically handle them according to your application's error-handling strategy.