Function esp_idf_svc::sys::esp_http_client_read

pub unsafe extern "C" fn esp_http_client_read(
    client: *mut esp_http_client,
    buffer: *mut i8,
    len: i32,
) -> i32

@brief Read data from http stream

@param[in] client The esp_http_client handle @param buffer The buffer @param[in] len The length

@return - (-1) if any errors - Length of data was read

@note (-ESP_ERR_HTTP_EAGAIN = -0x7007) is returned when call is timed-out before any data was ready