Struct HttpLayer 

pub struct HttpLayer {
    pub index: LayerIndex,
}

Lazy, index-based view of an HTTP/1.x message inside a packet buffer.

The same type represents either a request or a response; use HttpLayer::is_request / HttpLayer::is_response to disambiguate.

Fields

index: LayerIndex

Start / end byte offsets of this HTTP message within the enclosing packet buffer.

Implementations

impl HttpLayer

pub fn new(index: LayerIndex) -> Self

Create a new HttpLayer from a LayerIndex.

pub fn is_request(&self, buf: &[u8]) -> bool

Returns true when the layer data looks like an HTTP request.

pub fn is_response(&self, buf: &[u8]) -> bool

Returns true when the layer data looks like an HTTP response.

pub fn first_line<'a>(&self, buf: &'a [u8]) -> Option<&'a [u8]>

Return the first CRLF-terminated line of the HTTP message.

pub fn headers_end(buf: &[u8], start: usize) -> Option<usize>

Find the offset (relative to start) of the first byte after the \r\n\r\n header terminator. Returns None when the terminator is not found in buf[start..].

pub fn method<'a>(&self, buf: &'a [u8]) -> Option<&'a str>

Return the HTTP method for a request (e.g. "GET", "POST").

Returns None for responses or malformed data.

pub fn uri<'a>(&self, buf: &'a [u8]) -> Option<&'a str>

Return the request-URI for a request.

Returns None for responses or malformed data.

pub fn http_version<'a>(&self, buf: &'a [u8]) -> Option<&'a str>

Return the HTTP version string (e.g. "HTTP/1.1") for either a request or a response.

pub fn status_code(&self, buf: &[u8]) -> Option<u16>

Return the numeric status code for a response (e.g. 200, 404).

Returns None for requests or malformed data.

pub fn reason<'a>(&self, buf: &'a [u8]) -> Option<&'a str>

Return the reason phrase for a response (e.g. "OK", "Not Found").

Returns None for requests or malformed data.

pub fn header_value<'a>(&self, buf: &'a [u8], name: &str) -> Option<&'a str>

Perform a case-insensitive lookup for a header by name.

Returns the trimmed header value if found.

pub fn body_offset(&self, buf: &[u8]) -> Option<usize>

Return the absolute byte offset (in buf) where the body starts, i.e. the byte immediately after \r\n\r\n.

Returns None when the header terminator is not present.

pub fn content_length(&self, buf: &[u8]) -> Option<usize>

Parse the Content-Length header and return it as a usize.

Returns None when the header is absent or cannot be parsed.

pub fn is_chunked(&self, buf: &[u8]) -> bool

Return true when Transfer-Encoding: chunked is present.

pub fn summary_str(&self, buf: &[u8]) -> String

Generate a human-readable one-line summary:

• Request : "HTTP GET /path HTTP/1.1"
• Response: "HTTP 200 OK"

pub fn http_header_len(&self, buf: &[u8]) -> usize

Return the byte length of the HTTP headers section, including the terminal \r\n\r\n, but excluding the body.

Returns 0 when the header block cannot be located.

pub fn field_names(&self) -> &'static [&'static str]

Return the static list of field names for this layer.

pub fn get_field( &self, buf: &[u8], name: &str, ) -> Option<Result<FieldValue, FieldError>>

Return a field value by name.

Field name	Type	Notes
method	FieldValue::Bytes	requests only
uri	FieldValue::Bytes	requests only
version	FieldValue::Bytes	requests + responses
status_code	FieldValue::U16	responses only
reason	FieldValue::Bytes	responses only

Returns None for unrecognised field names or when the field does not apply to the current message type.

Trait Implementations

impl Clone for HttpLayer

fn clone(&self) -> HttpLayer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HttpLayer

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

Formats the value using the given formatter.

impl From<HttpLayer> for LayerEnum

fn from(v: HttpLayer) -> LayerEnum

Converts to this type from the input type.

impl Layer for HttpLayer

fn header_len(&self, data: &[u8]) -> usize

The header length for an HTTP layer is the number of bytes from the beginning of the message up to (and including) the \r\n\r\n header terminator. The body bytes are NOT included.

fn kind(&self) -> LayerKind

Get the kind of this layer

fn summary(&self, data: &[u8]) -> String

Get a human-readable summary of this layer

fn hashret(&self, _data: &[u8]) -> Vec<u8>

Compute a hash for packet matching.

fn answers(&self, _data: &[u8], _other: &Self, _other_data: &[u8]) -> bool

Check if this packet answers another packet.

fn extract_padding<'a>(&self, data: &'a [u8]) -> (&'a [u8], &'a [u8])

Extract padding from the packet.

fn field_names(&self) -> &'static [&'static str]

Get the list of field names for this layer

impl LayerDispatch for HttpLayer

fn dispatch_kind(&self) -> LayerKind

Get the kind of this layer.

fn dispatch_index(&self) -> &LayerIndex

Get the layer index (start/end offsets).

fn dispatch_summary(&self, buf: &[u8]) -> String

Get a human-readable summary.

fn dispatch_header_len(&self, buf: &[u8]) -> usize

Get the header length in bytes.

fn dispatch_hashret(&self, buf: &[u8]) -> Vec<u8>

Compute a hash for packet matching.

fn dispatch_field_names(&self) -> &'static [&'static str]

Get field names for this layer type.

fn dispatch_get_field( &self, buf: &[u8], name: &str, ) -> Option<Result<FieldValue, FieldError>>

Get a field value by name.

fn dispatch_set_field( &self, _buf: &mut [u8], _name: &str, _value: FieldValue, ) -> Option<Result<(), FieldError>>

Set a field value by name.

fn dispatch_show_fields(&self, buf: &[u8]) -> Vec<(&'static str, String)>

Get show-fields output.

impl TryInto<HttpLayer> for LayerEnum

type Error = &'static str

The type returned in the event of a conversion error.

fn try_into(self) -> Result<HttpLayer, <Self as TryInto<HttpLayer>>::Error>

Performs the conversion.