Make API calls more easier!

In v0.3, the attribute in derive macros is changed to #[api_req(...)] instead of #[api(...)] and #[payload(...)].

In v0.5, we have better error spanned in proc-macro. And use array for headers instead of tuple. Add default_headers_env_value_or_omit attribute meta.

Advantage

For example:

use api_req::Method;

#[derive(Debug, Default, Clone, Serialize, Payload)]
#[api_req(
    path = "/payments/{customer_id}", // format from struct fields
    method = Method::POST,
    ...
)]
pub struct ExamplePayload {
    #[serde(skip_serializing)]
    customer_id: String,
    amount: usize,
}

You can not only define the path, method, payload-format, pre-deserialize-action, and deserialize method, but also can format the path, headervalue with fields in the payload struct.

feature

stream - support stream response: RespStream
cookies - store cookies, which can be retrieved from COOKIE_JAR

Example

use api_req::{header, Payload, RedirectPolicy, ApiCaller, Method, ApiCaller as _};
use serde::{Serialize, Deserialize};
#[derive(Debug, Default, Clone, Serialize, Payload)]
#[api_req(
    path = "/payments/{customer_id}",
    method = Method::POST,
    headers = [(header::AUTHORIZATION, "Bearer token {bearer_token}")],
    req = form,  // use `form` to set body format instead of the default `json`
    before_deserialize = |text: String| text.strip_prefix("START: ").map(ToOwned::to_owned).ok_or(text),   // strip prefix, or original content if failed. `|String| -> Result<String, String>`
    deserialize = serde_urlencoded::from_str,   // deserialize with serde_urlencoded instead of the default serde_json
)]
pub struct ExamplePayload {
    #[serde(skip_serializing)]  // skip this field when serializing payload
    customer_id: String,
    #[serde(skip_serializing)]
    bearer_token: String,
    amount: usize,
}

#[derive(Debug, Deserialize)]
struct ExampleResponse {
    client_secret: String,
}

#[derive(ApiCaller)]
#[api_req(
    base_url = "http://example.com",
    default_headers = [(header::USER_AGENT, "...")],
    default_headers_env = [("api-key", "API_KEY")],    // get from env, panic if not presented
    default_headers_env_or_default = [("bala", "BALABALA")],   // omit if not presented
    redirect = RedirectPolicy::none()   // set redirect policy
)]
struct ExampleApi;

# async {
let payload = ExamplePayload::default();
let _resp: ExampleResponse = ExampleApi::request(payload).await.unwrap();
# };
// this will send a POST request to http://example.com/payments/{customer_id}
// with form `{"amount": 0}`

For POST request, the payload will be serialized as json body by default.

For GET request, the payload will be serialized as query parameters (urlencoded) by default.

You can set the payload format by req attribute in the #[api_req(...)] attribute, avaliable values are:

json
query
form
body (payload: Into<Body>)

One should ensure the req matches its Method.

api_req 0.5.0

Advantage

feature

Example