Convert cURL to Rust (reqwest)

-H · Request headers

curl

curl https://api.example.com/items -H "Accept: application/json" -H "X-Request-Id: 42"

Lines it adds to the Rust reqwest code

    req = req.header("Accept", "application/json");
    req = req.header("X-Request-Id", "42");

--json · A JSON body

--json is curl shorthand for a body plus both Content-Type: application/json and Accept: application/json, so both headers appear.

curl

curl https://api.example.com/items --json '{"name":"widget","qty":2}'

Lines it adds to the Rust reqwest code

    let mut req = client.post(url);
    req = req.header("Content-Type", "application/json");
    req = req.header("Accept", "application/json");
    req = req.body("{\"name\":\"widget\",\"qty\":2}");

-d · A form body

Two -d flags join with &, any -d makes the request a POST, and curl labels the body application/x-www-form-urlencoded unless you set a Content-Type yourself.

curl

curl https://api.example.com/login -d "user=ada" -d "remember=1"

Lines it adds to the Rust reqwest code

    let mut req = client.post(url);
    req = req.header("Content-Type", "application/x-www-form-urlencoded");
    req = req.body("user=ada&remember=1");

-G · Data sent as query parameters

-G moves the data into the URL and sends a GET with no body and no Content-Type, which is what curl puts on the wire.

curl

curl -G https://api.example.com/search --data-urlencode "q=café au lait"

Lines it adds to the Rust reqwest code

    let url = "https://api.example.com/search?q=caf%C3%A9+au+lait";

-u · Basic authentication

-u becomes an Authorization: Basic header with the base64 of user:password. If the command also sets its own Authorization header, that header wins, as it does in curl.

curl

curl -u ada:s3cret https://api.example.com/me

Lines it adds to the Rust reqwest code

    req = req.header("Authorization", "Basic YWRhOnMzY3JldA==");

-b · Cookies

curl

curl -b "session=abc123; theme=dark" https://api.example.com/me

Lines it adds to the Rust reqwest code

    req = req.header("Cookie", "session=abc123; theme=dark");

-F · A multipart upload

curl

curl https://api.example.com/upload -F "title=Q3 report" -F "file=@report.pdf"

Lines it adds to the Rust reqwest code

    let mut req = client.post(url);
    // The multipart feature builds the body and its Content-Type together;
    // attaching a file from disk also needs the stream feature:
    // cargo add reqwest --features multipart,stream
    let mut form = reqwest::multipart::Form::new();
    form = form.text("title", "Q3 report");
    form = form.file("file", "report.pdf").await?;
    req = req.multipart(form);

The converter also notes: a -F upload needs Content-Type: multipart/form-data with a boundary generated per request, so the target language sets that header itself.

-X · A different method

curl

curl -X DELETE https://api.example.com/items/7

Lines it adds to the Rust reqwest code

    let mut req = client.delete(url);

-I · A HEAD request

curl

curl -I https://api.example.com/health

Lines it adds to the Rust reqwest code

    let mut req = client.head(url);