Module reqwest::blocking

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Expand description

A blocking Client API.

The blocking Client will block the current thread to execute, instead of returning futures that need to be executed on a runtime.

Conversely, the functionality in reqwest::blocking must not be executed within an async runtime, or it will panic when attempting to block. If calling directly from an async function, consider using an async reqwest::Client instead. If the immediate context is only synchronous, but a transitive caller is async, consider changing that caller to use tokio::task::spawn_blocking around the calls that need to block.


This requires the optional blocking feature to be enabled.

§Making a GET request

For a single request, you can use the get shortcut method.

let body = reqwest::blocking::get("")?

println!("body = {body:?}");

Additionally, the blocking Response struct implements Rust’s Read trait, so many useful standard library and third party crates will have convenience methods that take a Response anywhere T: Read is acceptable.

NOTE: If you plan to perform multiple requests, it is best to create a Client and reuse it, taking advantage of keep-alive connection pooling.

§Making POST requests (or setting request bodies)

There are several ways you can set the body of a request. The basic one is by using the body() method of a RequestBuilder. This lets you set the exact raw bytes of what the body should be. It accepts various types, including String, Vec<u8>, and File. If you wish to pass a custom Reader, you can use the reqwest::blocking::Body::new() constructor.

let client = reqwest::blocking::Client::new();
let res ="")
    .body("the exact body that is sent")

§And More

Most features available to the asynchronous Client are also available, on the blocking Client, see those docs for more.



  • The body of a Request.
  • A Client to make Requests with.
  • A ClientBuilder can be used to create a Client with custom configuration.
  • A request which can be executed with Client::execute().
  • A builder to construct the properties of a Request.
  • A Response to a submitted Request.


  • Shortcut method to quickly make a blocking GET request.