AsyncClient

class impit.AsyncClient(browser=None, http3=None, proxy=None, timeout=None, verify=None, default_encoding=None, follow_redirects=None, max_redirects=None, cookie_jar=None, cookies=None, headers=None, local_address=None)

Asynchronous HTTP client with browser impersonation capabilities.

Parameters:

• browser (Browser | None) –

  Browser to impersonate (“chrome” or “firefox”).

  If this is None (default), no impersonation is performed.

• http3 (bool | None) –

  If set to True, Impit will try to connect to the target servers using HTTP/3 protocol (if supported by the server).

  Note

  The HTTP/3 support is experimental and may not work with all servers. The impersonation capabilities are limited when using HTTP/3.

• proxy (str | None) –

  The proxy URL to use for all the requests made by this client.

  This can be an HTTP, HTTPS, or SOCKS proxy.

• timeout (float | None) –

  Default request timeout in seconds.

  This value can be overridden for individual requests.

• verify (bool | None) –

  If set to False, impit will not verify SSL certificates.

  This can be used to ignore TLS errors (e.g., self-signed certificates).

  True by default.

• default_encoding (str | None) –

  Default encoding for response.text field (e.g., “utf-8”, “cp1252”).

  Overrides content-type headers and bytestream prescan.

• follow_redirects (bool | None) –

  If set to True the client will automatically follow HTTP redirects (3xx responses).

  False by default.

• max_redirects (int | None) –

  Maximum number of redirects to follow if the follow_redirects option is enabled.

  Default is 20.

• cookie_jar (CookieJar | None) –

  Cookie jar to store cookies in.

  This is a http.cookiejar.CookieJar instance.

  By default, Client doesn’t store cookies between requests.

• cookies (Cookies | None) –

  httpx-compatible cookies object.

  These are the cookies to include in all requests (to the matching servers) made by this client.

• headers (dict[str, str] | None) –

  Default HTTP headers to include in requests.

  These headers will be included in all requests made by this client.

  Default is an empty dictionary.

• local_address (str | None) –

  Local address to bind the client to.

  Useful for testing purposes or when you want to bind the client to a specific network interface. Can be an IP address in the format xxx.xxx.xxx.xxx (for IPv4) or ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff (for IPv6).

async delete(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous DELETE request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async get(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous GET request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async head(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous HEAD request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async options(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous OPTIONS request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async patch(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous PATCH request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async post(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous POST request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async put(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous PUT request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response

async request(method, url, content=None, data=None, headers=None, timeout=None, force_http3=None, stream=False)

Make an asynchronous HTTP request with the specified method.

Parameters:

• method (str) – HTTP method (e.g., “get”, “post”)

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

• stream (bool) – Whether to return a streaming response (default: False)

Return type:

Response

stream(method, url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous streaming request with the specified method.

This method returns a AsyncContextManager that yields a streaming Response object.

See the following example for usage:

with Client() as client:
    with client.stream("GET", "https://example.com/largefile") as response:
        for chunk in response.iter_bytes():
            process(chunk)  # Process each chunk as it is received

Parameters:

• method (str) – HTTP method (e.g., “get”, “post”)

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

AbstractAsyncContextManager[Response]

async trace(url, content=None, data=None, headers=None, timeout=None, force_http3=None)

Make an asynchronous TRACE request.

Parameters:

• url (str) – URL to request

• content (bytes | bytearray | list[int] | None) – Raw content to send

• data (dict[str, str] | None) – Form data to send in request body

• headers (dict[str, str] | None) – HTTP headers

• timeout (float | None) – Request timeout in seconds (overrides default timeout)

• force_http3 (bool | None) – Force HTTP/3 protocol

Return type:

Response