Struct Http2Settings 

pub struct Http2Settings {
    pub header_table_size: u32,
    pub enable_push: bool,
    pub max_concurrent_streams: u32,
    pub initial_window_size: u32,
    pub max_frame_size: u32,
    pub max_header_list_size: u32,
    pub initial_window_update: u32,
    pub send_all_settings: bool,
    pub priority_tree: Option<PriorityTree>,
    pub ping_interval: Option<Duration>,
    pub handshake_timeout: Option<Duration>,
}

HTTP/2 SETTINGS for fingerprinting.

Fields

header_table_size: u32

enable_push: bool

max_concurrent_streams: u32

initial_window_size: u32

max_frame_size: u32

max_header_list_size: u32

initial_window_update: u32

Initial connection-level WINDOW_UPDATE value sent after SETTINGS. Chrome: 15663105 (15MB), Firefox: 12517377 (12MB)

send_all_settings: bool

Whether to send all 6 SETTINGS parameters (Chrome) or only selective ones (Firefox). Firefox only sends: HEADER_TABLE_SIZE (1), INITIAL_WINDOW_SIZE (4), MAX_FRAME_SIZE (5)

priority_tree: Option<PriorityTree>

PRIORITY frame pattern to send during connection setup. Chrome sends PRIORITY frames for streams 3,5,7,9,11. Firefox sends different PRIORITY patterns.

ping_interval: Option<Duration>

PING frame interval for connection keep-alive. Chrome sends PING frames approximately every 45 seconds. Set to None to disable automatic PING frames.

handshake_timeout: Option<Duration>

Handshake timeout for waiting for server SETTINGS frame. Default: 10 seconds (matches h2 crate behavior). Set to None for no timeout (not recommended for production).

Implementations

impl Http2Settings

pub fn firefox() -> Self

Create Firefox 133 HTTP/2 settings.

Firefox differs from Chrome:

• HEADER_TABLE_SIZE: 65536 (same)
• ENABLE_PUSH: not sent (omitted from SETTINGS frame)
• MAX_CONCURRENT_STREAMS: not sent (omitted, defaults to unlimited)
• INITIAL_WINDOW_SIZE: 131072 (128KB, vs Chrome’s 6MB)
• MAX_FRAME_SIZE: 16384 (same)
• MAX_HEADER_LIST_SIZE: not sent (omitted)

Expected Firefox Akamai SETTINGS: 1:65536;4:131072;5:16384 Expected Firefox WINDOW_UPDATE: 12517377 (vs Chrome’s 15663105)

Trait Implementations

impl Clone for Http2Settings

fn clone(&self) -> Http2Settings

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Http2Settings

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Http2Settings

fn default() -> Self

Returns the “default value” for a type.