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//! HTTP requests.
use self::handle::{ContentEncodings, RequestHandle};
use super::body::{self, Body, StreamingBody};
use super::response::{
assert_single_downstream_response_is_sent, handles_to_response, FastlyResponseMetadata,
Response,
};
use super::{
INITIAL_HEADER_NAME_BUF_SIZE, INITIAL_HEADER_VALUE_BUF_SIZE, INITIAL_METHOD_BUF_SIZE,
INITIAL_URL_BUF_SIZE,
};
use crate::convert::{Borrowable, ToBackend, ToHeaderName, ToHeaderValue, ToMethod, ToUrl};
use crate::experimental::BodyExt;
use crate::handle::BodyHandle;
use fastly_shared::{CacheOverride, ClientCertVerifyResult, FastlyStatus, FramingHeadersMode};
use fastly_sys::fastly_http_req::SendErrorDetail;
use http::header::{HeaderName, HeaderValue};
use http::{HeaderMap, Method, Version};
use mime::Mime;
use serde::de::DeserializeOwned;
use serde::Serialize;
use std::borrow::Cow;
use std::io::{BufRead, Write};
use std::net::IpAddr;
use std::sync::Arc;
use thiserror::Error;
use url::Url;
pub use pending::{select, PendingRequest, PollResult};
#[macro_use]
mod macros;
pub(crate) mod handle;
pub(crate) mod pending;
/// An HTTP request, including body, headers, method, and URL.
///
/// # Getting the client request
///
/// Call [`Request::from_client()`] to get the client request being handled by this execution of the
/// Compute program.
///
/// # Creation and conversion
///
/// New requests can be created programmatically with [`Request::new()`]. In addition, there are
/// convenience constructors like [`Request::get()`] which automatically select the appropriate
/// method.
///
/// For interoperability with other Rust libraries, [`Request`] can be converted to and from the
/// [`http`] crate's [`http::Request`] type using the [`From`][`Self::from()`] and
/// [`Into`][`Self::into()`] traits.
///
/// # Sending backend requests
///
/// Requests can be sent to a backend in blocking or asynchronous fashion using
/// [`send()`][`Self::send()`], [`send_async()`][`Self::send_async()`], or
/// [`send_async_streaming()`][`Self::send_async_streaming()`].
///
/// # Builder-style methods
///
/// [`Request`] can be used as a
/// [builder](https://doc.rust-lang.org/1.0.0/style/ownership/builders.html), allowing requests to
/// be constructed and used through method chaining. Methods with the `with_` name prefix, such as
/// [`with_header()`][`Self::with_header()`], return `Self` to allow chaining. The builder style is
/// typically most useful when constructing and using a request in a single expression. For example:
///
/// ```no_run
/// # use fastly::{Error, Request};
/// # fn f() -> Result<(), Error> {
/// Request::get("https://example.com")
/// .with_header("my-header", "hello!")
/// .with_header("my-other-header", "Здравствуйте!")
/// .send("example_backend")?;
/// # Ok(()) }
/// ```
///
/// # Setter methods
///
/// Setter methods, such as [`set_header()`][`Self::set_header()`], are prefixed by `set_`, and can
/// be used interchangeably with the builder-style methods, allowing you to mix and match styles
/// based on what is most convenient for your program. Setter methods tend to work better than
/// builder-style methods when constructing a request involves conditional branches or loops. For
/// example:
///
/// ```no_run
/// # use fastly::{Error, Request};
/// # fn f(needs_translation: bool) -> Result<(), Error> {
/// let mut req = Request::get("https://example.com").with_header("my-header", "hello!");
/// if needs_translation {
/// req.set_header("my-other-header", "Здравствуйте!");
/// }
/// req.send("example_backend")?;
/// # Ok(()) }
/// ```
#[derive(Debug)]
pub struct Request {
version: Version,
method: Method,
url: Url,
headers: HeaderMap,
body: Option<Body>,
cache_override: CacheOverride,
is_from_client: bool,
auto_decompress_response: ContentEncodings,
framing_headers_mode: FramingHeadersMode,
// Overridden via experimental::RequestCacheKey
pub(crate) cache_key: Option<CacheKeyGen>,
}
#[derive(Clone)]
pub(crate) enum CacheKeyGen {
Lazy(Arc<dyn Fn(&Request) -> [u8; 32] + Send + Sync>),
Set([u8; 32]),
}
impl std::fmt::Debug for CacheKeyGen {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
CacheKeyGen::Lazy(f) => fmt.write_fmt(format_args!("Lazy({:?})", Arc::as_ptr(f))),
CacheKeyGen::Set(k) => {
const DIGITS: &[u8] = b"0123456789ABCDEF";
let mut hex = [0; 64];
for (i, b) in k.iter().enumerate() {
hex[i * 2] = DIGITS[(b >> 4) as usize];
hex[i * 2 + 1] = DIGITS[(b & 0xf) as usize];
}
fmt.write_fmt(format_args!("Set({})", std::str::from_utf8(&hex).unwrap()))
}
}
}
}
impl Request {
/// Get the client request being handled by this execution of the Compute program.
///
/// # Panics
///
/// This method panics if the client request has already been retrieved by this method or by
/// [the low-level handle API][`crate::handle`].
///
/// # Incompatibility with [`fastly::main`][`crate::main`]
///
/// This method cannot be used with [`fastly::main`][`crate::main`], as that attribute
/// implicitly calls [`Request::from_client()`] to populate the request argument. Use an
/// undecorated `main()` function instead, along with [`Response::send_to_client()`] or
/// [`Response::stream_to_client()`] to send a response to the client.
pub fn from_client() -> Request {
let (req_handle, body_handle) = self::handle::client_request_and_body();
Request::from_handles(req_handle, Some(body_handle))
}
/// Return `true` if this request is from the client of this execution of the Compute
/// program.
pub fn is_from_client(&self) -> bool {
self.is_from_client
}
/// Create a new request with the given method and URL, no headers, and an empty body.
///
/// # Argument type conversion
///
/// The method and URL arguments can be any types that implement [`ToMethod`] and [`ToUrl`],
/// respectively. See those traits for details on which types can be used and when panics may
/// arise during conversion.
pub fn new(method: impl ToMethod, url: impl ToUrl) -> Self {
Self {
version: Version::HTTP_11,
method: method.into_owned(),
url: url.into_owned(),
headers: HeaderMap::new(),
body: None,
cache_override: CacheOverride::default(),
is_from_client: false,
auto_decompress_response: ContentEncodings::empty(),
framing_headers_mode: FramingHeadersMode::Automatic,
cache_key: None,
}
}
/// Make a new request with the same method, url, headers, and version of this request, but no
/// body.
///
/// If you also need to clone the request body, use
/// [`clone_with_body()`][`Self::clone_with_body()`]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let original = Request::post("https://example.com")
/// .with_header("hello", "world!")
/// .with_body("hello");
/// let new = original.clone_without_body();
/// assert_eq!(original.get_method(), new.get_method());
/// assert_eq!(original.get_url(), new.get_url());
/// assert_eq!(original.get_header("hello"), new.get_header("hello"));
/// assert_eq!(original.get_version(), new.get_version());
/// assert!(original.has_body());
/// assert!(!new.has_body());
/// ```
pub fn clone_without_body(&self) -> Request {
Self {
version: self.version,
method: self.method.clone(),
url: self.url.clone(),
headers: self.headers.clone(),
body: None,
cache_override: self.cache_override.clone(),
is_from_client: self.is_from_client,
auto_decompress_response: self.auto_decompress_response,
framing_headers_mode: self.framing_headers_mode,
cache_key: self.cache_key.clone(),
}
}
/// Clone this request by reading in its body, and then writing the same body to the original
/// and the cloned request.
///
/// This method requires mutable access to this request because reading from and writing to the
/// body can involve an HTTP connection.
///
#[doc = include_str!("../../docs/snippets/clones-body.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut original = Request::post("https://example.com")
/// .with_header("hello", "world!")
/// .with_body("hello");
/// let mut new = original.clone_with_body();
/// assert_eq!(original.get_method(), new.get_method());
/// assert_eq!(original.get_url(), new.get_url());
/// assert_eq!(original.get_header("hello"), new.get_header("hello"));
/// assert_eq!(original.get_version(), new.get_version());
/// assert_eq!(original.take_body_bytes(), new.take_body_bytes());
/// ```
pub fn clone_with_body(&mut self) -> Request {
let mut new_req = self.clone_without_body();
if self.has_body() {
let mut body = self.take_body();
for chunk in body.read_chunks(4096) {
let chunk = chunk.expect("can read body chunk");
new_req
.get_body_mut()
.write_all(&chunk)
.expect("failed to write to cloned body");
self.get_body_mut()
.write_all(&chunk)
.expect("failed to write to cloned body");
}
if let Ok(trailers) = body.get_trailers() {
for (k, v) in trailers.iter() {
self.get_body_mut().append_trailer(k, v);
new_req.get_body_mut().append_trailer(k, v);
}
}
}
new_req
}
/// Create a new `GET` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn get(url: impl ToUrl) -> Self {
Self::new(Method::GET, url)
}
/// Create a new `HEAD` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn head(url: impl ToUrl) -> Self {
Self::new(Method::HEAD, url)
}
/// Create a new `POST` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn post(url: impl ToUrl) -> Self {
Self::new(Method::POST, url)
}
/// Create a new `PUT` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn put(url: impl ToUrl) -> Self {
Self::new(Method::PUT, url)
}
/// Create a new `DELETE` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn delete(url: impl ToUrl) -> Self {
Self::new(Method::DELETE, url)
}
/// Create a new `CONNECT` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn connect(url: impl ToUrl) -> Self {
Self::new(Method::CONNECT, url)
}
/// Create a new `OPTIONS` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn options(url: impl ToUrl) -> Self {
Self::new(Method::OPTIONS, url)
}
/// Create a new `TRACE` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn trace(url: impl ToUrl) -> Self {
Self::new(Method::TRACE, url)
}
/// Create a new `PATCH` [`Request`] with the given URL, no headers, and an empty body.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn patch(url: impl ToUrl) -> Self {
Self::new(Method::PATCH, url)
}
/// Send the request to the given backend server, and return once the response headers have been
/// received, or an error occurs.
///
#[doc = include_str!("../../docs/snippets/backend-argument.md")]
///
/// # Examples
///
/// Sending the client request to a backend without modification:
///
/// ```no_run
/// # use fastly::Request;
/// let backend_resp = Request::from_client().send("example_backend").expect("request succeeds");
/// assert!(backend_resp.get_status().is_success());
/// ```
///
/// Sending a synthetic request:
///
/// ```no_run
/// # use fastly::Request;
/// let backend_resp = Request::get("https://example.com")
/// .send("example_backend")
/// .expect("request succeeds");
/// assert!(backend_resp.get_status().is_success());
/// ```
pub fn send(self, backend: impl ToBackend) -> Result<Response, SendError> {
let backend = backend.into_owned();
let (req_handle, req_body_handle, sent_req) = self.prepare_handles(&backend)?;
let (resp_handle, resp_body_handle) = try_with_req!(
backend.name(),
sent_req,
req_handle.send(req_body_handle, backend.name())
);
Ok(handles_to_response(
resp_handle,
resp_body_handle,
FastlyResponseMetadata::new(backend, sent_req),
))
}
/// Begin sending the request to the given backend server, and return a [`PendingRequest`] that
/// can yield the backend response or an error.
///
/// This method returns as soon as the request begins sending to the backend, and transmission
/// of the request body and headers will continue in the background.
///
/// This method allows for sending more than one request at once and receiving their responses
/// in arbitrary orders. See [`PendingRequest`] for more details on how to wait on, poll, or
/// select between pending requests.
///
/// This method is also useful for sending requests where the response is unimportant, but the
/// request may take longer than the Compute program is able to run, as the request will
/// continue sending even after the program that initiated it exits.
///
#[doc = include_str!("../../docs/snippets/backend-argument.md")]
///
/// # Examples
///
/// Sending a request to two backends and returning whichever response finishes first:
///
/// ```no_run
/// # use fastly::Request;
/// let backend_resp_1 = Request::get("https://example.com/")
/// .send_async("example_backend_1")
/// .expect("request 1 begins sending");
/// let backend_resp_2 = Request::get("https://example.com/")
/// .send_async("example_backend_2")
/// .expect("request 2 begins sending");
/// let (resp, _) = fastly::http::request::select(vec![backend_resp_1, backend_resp_2]);
/// resp.expect("request succeeds").send_to_client();
/// ```
///
/// Sending a long-running request and ignoring its result so that the program can exit before
/// it completes:
///
/// ```no_run
/// # use fastly::Request;
/// # let some_large_file = vec![0u8];
/// let _ = Request::post("https://example.com")
/// .with_body(some_large_file)
/// .send_async("example_backend");
/// ```
pub fn send_async(self, backend: impl ToBackend) -> Result<PendingRequest, SendError> {
let backend = backend.into_owned();
let (req_handle, req_body_handle, sent_req) = self.prepare_handles(&backend)?;
let pending_req_handle = try_with_req!(
backend.name(),
sent_req,
req_handle.send_async(req_body_handle, backend.name())
);
let pending_req = PendingRequest::new(
pending_req_handle,
FastlyResponseMetadata::new(backend, sent_req),
);
Ok(pending_req)
}
/// Begin sending the request to the given backend server, and return a [`PendingRequest`] that
/// can yield the backend response or an error along with a [`StreamingBody`] that can accept
/// further data to send.
///
/// The backend connection is only closed once [`StreamingBody::finish()`] is called. The
/// [`PendingRequest`] will not yield a [`Response`] until the [`StreamingBody`] is finished.
///
/// This method is most useful for programs that do some sort of processing or inspection of a
/// potentially-large client request body. Streaming allows the program to operate on small
/// parts of the body rather than having to read it all into memory at once.
///
/// This method returns as soon as the request begins sending to the backend, and transmission
/// of the request body and headers will continue in the background.
///
/// # Examples
///
/// Count the number of lines in a UTF-8 client request body while sending it to the backend:
///
/// ```no_run
/// # use fastly::Request;
/// use std::io::{BufRead, Write};
///
/// let mut req = Request::from_client();
/// // Take the body so we can iterate through its lines later
/// let req_body = req.take_body();
/// // Start sending the client request to the client with a now-empty body
/// let (mut backend_body, pending_req) = req
/// .send_async_streaming("example_backend")
/// .expect("request begins sending");
///
/// let mut num_lines = 0;
/// for line in req_body.lines() {
/// let line = line.unwrap();
/// num_lines += 1;
/// // Write the line to the streaming backend body
/// backend_body.write_all(line.as_bytes()).unwrap();
/// }
/// // Finish the streaming body to allow the backend connection to close
/// backend_body.finish().unwrap();
///
/// println!("client request body contained {} lines", num_lines);
/// ```
pub fn send_async_streaming(
self,
backend: impl ToBackend,
) -> Result<(StreamingBody, PendingRequest), SendError> {
let backend = backend.into_owned();
let (req_handle, req_body_handle, sent_req) = self.prepare_handles(&backend)?;
let (streaming_body_handle, pending_req_handle) = try_with_req!(
backend.name(),
sent_req,
req_handle.send_async_streaming(req_body_handle, backend.name())
);
let pending_req = PendingRequest::new(
pending_req_handle,
FastlyResponseMetadata::new(backend, sent_req),
);
Ok((streaming_body_handle.into(), pending_req))
}
/// A helper function for decomposing a [`Request`] into handles for use in hostcalls.
///
/// Note that in addition to the [`RequestHandle`] and [`BodyHandle`], the tuple returned also
/// includes a copy of the original request so that metadata about the request can be inspected
/// later using the `FastlyResponseMetadata` extension.
///
/// This will return an error if the backend name is invalid, or if the request does not have a
/// valid URI.
fn prepare_handles(
mut self,
backend: impl ToBackend,
) -> Result<(RequestHandle, BodyHandle, Self), SendError> {
// First, validate the request.
if let Err(e) = validate_request(&self) {
return Err(SendError::new(
backend.into_borrowable().as_ref().name(),
self,
e,
));
}
let (req_handle, body_handle) = self.to_handles();
Ok((
req_handle,
// TODO ACF 2020-11-30: it'd be nice to change the ABI so that body handles were
// optional to save a hostcall for many requests
body_handle.unwrap_or_else(|| BodyHandle::new()),
self,
))
}
/// Builder-style equivalent of [`set_body()`][`Self::set_body()`].
pub fn with_body(mut self, body: impl Into<Body>) -> Self {
self.set_body(body);
self
}
/// Returns `true` if this request has a body.
pub fn has_body(&self) -> bool {
self.body.is_some()
}
/// Get a mutable reference to the body of this request.
///
#[doc = include_str!("../../docs/snippets/creates-empty-body.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// use std::io::Write;
///
/// let mut req = Request::post("https://example.com").with_body("hello,");
/// write!(req.get_body_mut(), " world!").unwrap();
/// assert_eq!(&req.into_body_str(), "hello, world!");
/// ```
pub fn get_body_mut(&mut self) -> &mut Body {
self.body.get_or_insert_with(|| Body::new())
}
/// Get a shared reference to the body of this request if it has one, otherwise return `None`.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// use std::io::Write;
///
/// let mut req = Request::post("https://example.com");
/// assert!(req.try_get_body_mut().is_none());
///
/// req.set_body("hello,");
/// write!(req.try_get_body_mut().expect("body now exists"), " world!").unwrap();
/// assert_eq!(&req.into_body_str(), "hello, world!");
/// ```
pub fn try_get_body_mut(&mut self) -> Option<&mut Body> {
self.body.as_mut()
}
/// Get a prefix of this request's body containing up to the given number of bytes.
///
/// See [`Body::get_prefix_mut()`] for details.
pub fn get_body_prefix_mut(&mut self, length: usize) -> body::Prefix {
self.get_body_mut().get_prefix_mut(length)
}
/// Get a prefix of this request's body as a string containing up to the given number of bytes.
///
/// See [`Body::get_prefix_str_mut()`] for details.
///
/// # Panics
///
/// If the prefix contains invalid UTF-8 bytes, this function will panic. The exception to this
/// is if the bytes are invalid because a multi-byte codepoint is cut off by the requested
/// prefix length. In this case, the invalid bytes are left off the end of the prefix.
///
/// To explicitly handle the possibility of invalid UTF-8 bytes, use
/// [`try_get_body_prefix_str_mut()`][`Self::try_get_body_prefix_str_mut()`], which returns an
/// error on failure rather than panicking.
pub fn get_body_prefix_str_mut(&mut self, length: usize) -> body::PrefixString {
self.get_body_mut().get_prefix_str_mut(length)
}
/// Try to get a prefix of the body as a string containing up to the given number of bytes.
///
/// See [`Body::try_get_prefix_str_mut()`] for details.
pub fn try_get_body_prefix_str_mut(
&mut self,
length: usize,
) -> Result<body::PrefixString, std::str::Utf8Error> {
self.get_body_mut().try_get_prefix_str_mut(length)
}
/// Set the given value as the request's body.
#[doc = include_str!("../../docs/snippets/body-argument.md")]
#[doc = include_str!("../../docs/snippets/discards-body.md")]
pub fn set_body(&mut self, body: impl Into<Body>) {
self.body = Some(body.into());
}
/// Take and return the body from this request.
///
/// After calling this method, this request will no longer have a body.
///
#[doc = include_str!("../../docs/snippets/creates-empty-body.md")]
pub fn take_body(&mut self) -> Body {
self.body.take().unwrap_or_else(|| Body::new())
}
/// Take and return the body from this request if it has one, otherwise return `None`.
///
/// After calling this method, this request will no longer have a body.
pub fn try_take_body(&mut self) -> Option<Body> {
self.body.take()
}
/// Append another [`Body`] to the body of this request without reading or writing any body
/// contents.
///
/// If this request does not have a body, the appended body is set as the request's body.
///
#[doc = include_str!("../../docs/snippets/body-append-constant-time.md")]
///
/// This method should be used when combining bodies that have not necessarily been read yet,
/// such as the body of the client. To append contents that are already in memory as strings or
/// bytes, you should instead use [`get_body_mut()`][`Self::get_body_mut()`] to write the
/// contents to the end of the body.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com").with_body("hello! client says: ");
/// req.append_body(Request::from_client().into_body());
/// req.send("example_backend").unwrap();
/// ```
pub fn append_body(&mut self, other: Body) {
if let Some(ref mut body) = &mut self.body {
body.append(other);
} else {
self.body = Some(other);
}
}
/// Consume the request and return its body as a byte vector.
///
#[doc = include_str!("../../docs/snippets/buffers-body-reqresp.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::post("https://example.com").with_body(b"hello, world!".to_vec());
/// let bytes = req.into_body_bytes();
/// assert_eq!(&bytes, b"hello, world!");
pub fn into_body_bytes(mut self) -> Vec<u8> {
self.take_body_bytes()
}
/// Consume the request and return its body as a string.
///
#[doc = include_str!("../../docs/snippets/buffers-body-reqresp.md")]
///
/// # Panics
///
#[doc = include_str!("../../docs/snippets/panics-reqresp-intobody-utf8.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::post("https://example.com").with_body("hello, world!");
/// let string = req.into_body_str();
/// assert_eq!(&string, "hello, world!");
/// ```
pub fn into_body_str(mut self) -> String {
self.take_body_str()
}
/// Consume the request and return its body as a string, including invalid characters.
///
#[doc = include_str!("../../docs/snippets/utf8-replacement.md")]
///
#[doc = include_str!("../../docs/snippets/buffers-body-reqresp.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com");
/// req.set_body_octet_stream(b"\xF0\x90\x80 hello, world!");
/// let string = req.into_body_str_lossy();
/// assert_eq!(&string, "� hello, world!");
/// ```
pub fn into_body_str_lossy(mut self) -> String {
self.take_body_str_lossy()
}
/// Consume the request and return its body.
///
#[doc = include_str!("../../docs/snippets/creates-empty-body.md")]
pub fn into_body(self) -> Body {
self.body.unwrap_or_else(|| Body::new())
}
/// Consume the request and return its body if it has one, otherwise return `None`.
pub fn try_into_body(self) -> Option<Body> {
self.body
}
/// Builder-style equivalent of [`set_body_text_plain()`][`Self::set_body_text_plain()`].
pub fn with_body_text_plain(mut self, body: &str) -> Self {
self.set_body_text_plain(body);
self
}
/// Set the given string as the request's body with content type `text/plain; charset=UTF-8`.
///
#[doc = include_str!("../../docs/snippets/discards-body.md")]
#[doc = include_str!("../../docs/snippets/sets-text-plain.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com");
/// req.set_body_text_plain("hello, world!");
/// assert_eq!(req.get_content_type(), Some(fastly::mime::TEXT_PLAIN_UTF_8));
/// assert_eq!(&req.into_body_str(), "hello, world!");
/// ```
pub fn set_body_text_plain(&mut self, body: &str) {
self.body = Some(Body::from(body));
self.set_content_type(mime::TEXT_PLAIN_UTF_8);
}
/// Builder-style equivalent of [`set_body_text_html()`][`Self::set_body_text_html()`].
pub fn with_body_text_html(mut self, body: &str) -> Self {
self.set_body_text_html(body);
self
}
/// Set the given string as the request's body with content type `text/html; charset=UTF-8`.
///
#[doc = include_str!("../../docs/snippets/discards-body.md")]
#[doc = include_str!("../../docs/snippets/sets-text-html.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com");
/// req.set_body_text_html("<p>hello, world!</p>");
/// assert_eq!(req.get_content_type(), Some(fastly::mime::TEXT_HTML_UTF_8));
/// assert_eq!(&req.into_body_str(), "<p>hello, world!</p>");
/// ```
pub fn set_body_text_html(&mut self, body: &str) {
self.body = Some(Body::from(body));
self.set_content_type(mime::TEXT_HTML_UTF_8);
}
/// Take and return the body from this request as a string.
///
/// After calling this method, this request will no longer have a body.
///
#[doc = include_str!("../../docs/snippets/buffers-body-reqresp.md")]
///
/// # Panics
///
#[doc = include_str!("../../docs/snippets/panics-reqresp-takebody-utf8.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com").with_body("hello, world!");
/// let string = req.take_body_str();
/// assert!(req.try_take_body().is_none());
/// assert_eq!(&string, "hello, world!");
/// ```
pub fn take_body_str(&mut self) -> String {
if let Some(body) = self.try_take_body() {
body.into_string()
} else {
String::new()
}
}
/// Take and return the body from this request as a string, including invalid characters.
///
#[doc = include_str!("../../docs/snippets/utf8-replacement.md")]
///
/// After calling this method, this request will no longer have a body.
///
#[doc = include_str!("../../docs/snippets/buffers-body-reqresp.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com");
/// req.set_body_octet_stream(b"\xF0\x90\x80 hello, world!");
/// let string = req.take_body_str_lossy();
/// assert!(req.try_take_body().is_none());
/// assert_eq!(&string, "� hello, world!");
/// ```
pub fn take_body_str_lossy(&mut self) -> String {
if let Some(body) = self.try_take_body() {
String::from_utf8_lossy(&body.into_bytes()).to_string()
} else {
String::new()
}
}
/// Return a [`Lines`][`std::io::Lines`] iterator that reads the request body a line at a time.
///
/// # Examples
///
/// ```no_run
/// # use fastly::{Body, Request};
/// use std::io::Write;
///
/// fn remove_es(req: &mut Request) {
/// let mut no_es = Body::new();
/// for line in req.read_body_lines() {
/// writeln!(no_es, "{}", line.unwrap().replace("e", "")).unwrap();
/// }
/// req.set_body(no_es);
/// }
/// ```
pub fn read_body_lines(&mut self) -> std::io::Lines<&mut Body> {
self.get_body_mut().lines()
}
/// Builder-style equivalent of [`set_body_octet_stream()`][`Self::set_body_octet_stream()`].
pub fn with_body_octet_stream(mut self, body: &[u8]) -> Self {
self.set_body_octet_stream(body);
self
}
/// Set the given bytes as the request's body.
///
#[doc = include_str!("../../docs/snippets/discards-body.md")]
#[doc = include_str!("../../docs/snippets/sets-app-octet-stream.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com");
/// req.set_body_octet_stream(b"hello, world!");
/// assert_eq!(req.get_content_type(), Some(fastly::mime::APPLICATION_OCTET_STREAM));
/// assert_eq!(&req.into_body_bytes(), b"hello, world!");
/// ```
pub fn set_body_octet_stream(&mut self, body: &[u8]) {
self.body = Some(Body::from(body));
self.set_content_type(mime::APPLICATION_OCTET_STREAM);
}
/// Take and return the body from this request as a string.
///
/// After calling this method, this request will no longer have a body.
///
#[doc = include_str!("../../docs/snippets/buffers-body-reqresp.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com").with_body(b"hello, world!".to_vec());
/// let bytes = req.take_body_bytes();
/// assert!(req.try_take_body().is_none());
/// assert_eq!(&bytes, b"hello, world!");
/// ```
pub fn take_body_bytes(&mut self) -> Vec<u8> {
if let Some(body) = self.try_take_body() {
body.into_bytes()
} else {
Vec::new()
}
}
/// Return an iterator that reads the request body in chunks of at most the given number of
/// bytes.
///
/// If `chunk_size` does not evenly divide the length of the body, then the last chunk will not
/// have length `chunk_size`.
///
/// # Examples
///
/// ```no_run
/// # use fastly::{Body, Request};
/// use std::io::Write;
/// fn remove_0s(req: &mut Request) {
/// let mut no_0s = Body::new();
/// for chunk in req.read_body_chunks(4096) {
/// let mut chunk = chunk.unwrap();
/// chunk.retain(|b| *b != 0);
/// no_0s.write_all(&chunk).unwrap();
/// }
/// req.set_body(no_0s);
/// }
/// ```
pub fn read_body_chunks<'a>(
&'a mut self,
chunk_size: usize,
) -> impl Iterator<Item = Result<Vec<u8>, std::io::Error>> + 'a {
self.get_body_mut().read_chunks(chunk_size)
}
/// Builder-style equivalent of [`set_body_json()`][Self::set_body_json()`].
pub fn with_body_json(mut self, value: &impl Serialize) -> Result<Self, serde_json::Error> {
self.set_body_json(value)?;
Ok(self)
}
/// Convert the given value to JSON and set that JSON as the request's body.
///
/// The given value must implement [`serde::Serialize`]. You can either implement that trait for
/// your own custom type, or use [`serde_json::Value`] to create untyped JSON values. See
/// [`serde_json`] for details.
///
#[doc = include_str!("../../docs/snippets/discards-body.md")]
///
/// # Content type
///
/// This method sets the content type to `application/json`.
///
/// # Errors
///
/// This method returns [`serde_json::Error`] if serialization fails.
///
/// # Examples
///
/// Using a type that derives [`serde::Serialize`]:
///
/// ```no_run
/// # use fastly::Request;
/// #[derive(serde::Serialize)]
/// struct MyData {
/// name: String,
/// count: u64,
/// }
/// let my_data = MyData { name: "Computers".to_string(), count: 1024 };
/// let mut req = Request::post("https://example.com");
/// req.set_body_json(&my_data).unwrap();
/// assert_eq!(req.get_content_type(), Some(fastly::mime::APPLICATION_JSON));
/// assert_eq!(&req.into_body_str(), r#"{"name":"Computers","count":1024}"#);
/// ```
///
/// Using untyped JSON and the [`serde_json::json`] macro:
///
/// ```no_run
/// # use fastly::Request;
/// let my_data = serde_json::json!({
/// "name": "Computers",
/// "count": 1024,
/// });
/// let mut req = Request::post("https://example.com");
/// req.set_body_json(&my_data).unwrap();
/// assert_eq!(req.get_content_type(), Some(fastly::mime::APPLICATION_JSON));
/// assert_eq!(&req.into_body_str(), r#"{"count":1024,"name":"Computers"}"#);
/// ```
pub fn set_body_json(&mut self, value: &impl Serialize) -> Result<(), serde_json::Error> {
self.body = Some(Body::new());
serde_json::to_writer(self.get_body_mut(), value)?;
self.set_content_type(mime::APPLICATION_JSON);
Ok(())
}
/// Take the request body and attempt to parse it as a JSON value.
///
/// The return type must implement [`serde::Deserialize`] without any non-static lifetimes. You
/// can either implement that trait for your own custom type, or use [`serde_json::Value`] to
/// deserialize untyped JSON values. See [`serde_json`] for details.
///
/// After calling this method, this request will no longer have a body.
///
/// # Errors
///
/// This method returns [`serde_json::Error`] if deserialization fails.
///
/// # Examples
///
/// Using a type that derives [`serde::de::DeserializeOwned`]:
///
/// ```no_run
/// # use fastly::Request;
/// #[derive(serde::Deserialize)]
/// struct MyData {
/// name: String,
/// count: u64,
/// }
/// let mut req = Request::post("https://example.com")
/// .with_body(r#"{"name":"Computers","count":1024}"#);
/// let my_data = req.take_body_json::<MyData>().unwrap();
/// assert_eq!(&my_data.name, "Computers");
/// assert_eq!(my_data.count, 1024);
/// ```
///
/// Using untyped JSON with [`serde_json::Value`]:
///
/// ```no_run
/// # use fastly::Request;
/// let my_data = serde_json::json!({
/// "name": "Computers",
/// "count": 1024,
/// });
/// let mut req = Request::post("https://example.com")
/// .with_body(r#"{"name":"Computers","count":1024}"#);
/// let my_data = req.take_body_json::<serde_json::Value>().unwrap();
/// assert_eq!(my_data["name"].as_str(), Some("Computers"));
/// assert_eq!(my_data["count"].as_u64(), Some(1024));
/// ```
pub fn take_body_json<T: DeserializeOwned>(&mut self) -> Result<T, serde_json::Error> {
if let Some(body) = self.try_take_body() {
serde_json::from_reader(body)
} else {
serde_json::from_reader(std::io::empty())
}
}
/// Builder-style equivalent of [`set_body_form()`][`Self::set_body_form()`].
pub fn with_body_form(
mut self,
value: &impl Serialize,
) -> Result<Self, serde_urlencoded::ser::Error> {
self.set_body_form(value)?;
Ok(self)
}
/// Convert the given value to `application/x-www-form-urlencoded` format and set that data as
/// the request's body.
///
/// The given value must implement [`serde::Serialize`]; see the trait documentation for
/// details.
///
#[doc = include_str!("../../docs/snippets/discards-body.md")]
///
/// # Content type
///
/// This method sets the content type to `application/x-www-form-urlencoded`.
///
/// # Errors
///
/// This method returns [`serde_urlencoded::ser::Error`] if serialization fails.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// #[derive(serde::Serialize)]
/// struct MyData {
/// name: String,
/// count: u64,
/// }
/// let my_data = MyData { name: "Computers".to_string(), count: 1024 };
/// let mut req = Request::post("https://example.com");
/// req.set_body_form(&my_data).unwrap();
/// assert_eq!(req.get_content_type(), Some(fastly::mime::APPLICATION_WWW_FORM_URLENCODED));
/// assert_eq!(&req.into_body_str(), "name=Computers&count=1024");
/// ```
pub fn set_body_form(
&mut self,
value: &impl Serialize,
) -> Result<(), serde_urlencoded::ser::Error> {
self.body = Some(Body::new());
let s = serde_urlencoded::to_string(value)?;
self.set_body(s);
self.set_content_type(mime::APPLICATION_WWW_FORM_URLENCODED);
Ok(())
}
/// Take the request body and attempt to parse it as a `application/x-www-form-urlencoded`
/// formatted string.
///
#[doc = include_str!("../../docs/snippets/returns-deserializeowned.md")]
///
/// After calling this method, this request will no longer have a body.
///
/// # Errors
///
/// This method returns [`serde_urlencoded::de::Error`] if deserialization fails.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// #[derive(serde::Deserialize)]
/// struct MyData {
/// name: String,
/// count: u64,
/// }
/// let mut req = Request::post("https://example.com").with_body("name=Computers&count=1024");
/// let my_data = req.take_body_form::<MyData>().unwrap();
/// assert_eq!(&my_data.name, "Computers");
/// assert_eq!(my_data.count, 1024);
/// ```
pub fn take_body_form<T: DeserializeOwned>(
&mut self,
) -> Result<T, serde_urlencoded::de::Error> {
if let Some(body) = self.try_take_body() {
serde_urlencoded::from_reader(body)
} else {
serde_urlencoded::from_reader(std::io::empty())
}
}
/// Get the MIME type described by the request's
/// [`Content-Type`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Type)
/// header, or `None` if that header is absent or contains an invalid MIME type.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::post("https://example.com").with_body_text_plain("hello, world!");
/// assert_eq!(req.get_content_type(), Some(fastly::mime::TEXT_PLAIN_UTF_8));
/// ```
pub fn get_content_type(&self) -> Option<Mime> {
self.get_header_str(http::header::CONTENT_TYPE).map(|v| {
v.parse()
.unwrap_or_else(|_| panic!("invalid MIME type in Content-Type header: {}", v))
})
}
/// Builder-style equivalent of [`set_content_type()`][`Self::set_content_type()`].
pub fn with_content_type(mut self, mime: Mime) -> Self {
self.set_content_type(mime);
self
}
/// Set the MIME type described by the request's
/// [`Content-Type`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Type)
/// header.
///
/// Any existing `Content-Type` header values will be overwritten.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::post("https://example.com").with_body("hello,world!");
/// req.set_content_type(fastly::mime::TEXT_CSV_UTF_8);
/// ```
pub fn set_content_type(&mut self, mime: Mime) {
self.set_header(http::header::CONTENT_TYPE, mime.as_ref())
}
/// Get the value of the request's
/// [`Content-Length`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Length)
/// header, if it exists.
pub fn get_content_length(&self) -> Option<usize> {
self.get_header(http::header::CONTENT_LENGTH)
.and_then(|v| v.to_str().ok())
.and_then(|v| v.parse().ok())
}
/// Returns whether the given header name is present in the request.
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com").with_header("hello", "world!");
/// assert!(req.contains_header("hello"));
/// assert!(!req.contains_header("not-present"));
/// ```
pub fn contains_header(&self, name: impl ToHeaderName) -> bool {
self.headers.contains_key(name.into_borrowable().as_ref())
}
/// Builder-style equivalent of [`append_header()`][`Self::append_header()`].
pub fn with_header(mut self, name: impl ToHeaderName, value: impl ToHeaderValue) -> Self {
self.append_header(name, value);
self
}
/// Builder-style equivalent of [`set_header()`][`Self::set_header()`].
pub fn with_set_header(mut self, name: impl ToHeaderName, value: impl ToHeaderValue) -> Self {
self.set_header(name, value);
self
}
/// Get the value of a header as a string, or `None` if the header is not present.
///
/// If there are multiple values for the header, only one is returned, which may be any of the
/// values. See [`get_header_all_str()`][`Self::get_header_all_str()`] if you need to get all of
/// the values.
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Panics
///
#[doc = include_str!("../../docs/snippets/panics-reqresp-header-utf8.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com").with_header("hello", "world!");
/// assert_eq!(req.get_header_str("hello"), Some("world"));
/// ```
pub fn get_header_str(&self, name: impl ToHeaderName) -> Option<&str> {
let name = name.into_borrowable();
if let Some(hdr) = self.get_header(name.as_ref()) {
Some(
std::str::from_utf8(hdr.as_bytes())
.unwrap_or_else(|_| panic!("non-UTF-8 HTTP header value for header: {}", name)),
)
} else {
None
}
}
/// Get the value of a header as a string, including invalid characters, or `None` if the header
/// is not present.
///
#[doc = include_str!("../../docs/snippets/utf8-replacement.md")]
///
/// If there are multiple values for the header, only one is returned, which may be any of the
/// values. See [`get_header_all_str_lossy()`][`Self::get_header_all_str_lossy()`] if you need
/// to get all of the values.
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// # use http::header::HeaderValue;
/// # use std::borrow::Cow;
/// let header_value = HeaderValue::from_bytes(b"\xF0\x90\x80 world!").unwrap();
/// let req = Request::get("https://example.com").with_header("hello", header_value);
/// assert_eq!(req.get_header_str_lossy("hello"), Some(Cow::from("� world")));
/// ```
pub fn get_header_str_lossy(&self, name: impl ToHeaderName) -> Option<Cow<'_, str>> {
self.get_header(name)
.map(|hdr| String::from_utf8_lossy(hdr.as_bytes()))
}
/// Get the value of a header, or `None` if the header is not present.
///
/// If there are multiple values for the header, only one is returned, which may be any of the
/// values. See [`get_header_all()`][`Self::get_header_all()`] if you need to get all of the
/// values.
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// Handling UTF-8 values explicitly:
///
/// ```no_run
/// # use fastly::Request;
/// # use fastly::http::HeaderValue;
/// let req = Request::get("https://example.com").with_header("hello", "world!");
/// assert_eq!(req.get_header("hello"), Some(&HeaderValue::from_static("world")));
/// ```
///
/// Safely handling invalid UTF-8 values:
///
/// ```no_run
/// # use fastly::Request;
/// let invalid_utf8 = &"🐈".as_bytes()[0..3];
/// let req = Request::get("https://example.com").with_header("hello", invalid_utf8);
/// assert_eq!(req.get_header("hello").unwrap().as_bytes(), invalid_utf8);
/// ```
pub fn get_header(&self, name: impl ToHeaderName) -> Option<&HeaderValue> {
self.headers.get(name.into_borrowable().as_ref())
}
/// Get all values of a header as strings, or an empty vector if the header is not present.
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Panics
///
#[doc = include_str!("../../docs/snippets/panics-reqresp-headers-utf8.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("hello", "universe!");
/// let values = req.get_header_all_str("hello");
/// assert_eq!(values.len(), 2);
/// assert!(values.contains(&"world!"));
/// assert!(values.contains(&"universe!"));
/// ```
pub fn get_header_all_str(&self, name: impl ToHeaderName) -> Vec<&str> {
let name = name.into_borrowable();
self.get_header_all(name.as_ref())
.map(|v| {
std::str::from_utf8(v.as_bytes())
.unwrap_or_else(|_| panic!("non-UTF-8 HTTP header value for header: {}", name))
})
.collect()
}
/// Get all values of a header as strings, including invalid characters, or an empty vector if the header is not present.
///
#[doc = include_str!("../../docs/snippets/utf8-replacement.md")]
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use std::borrow::Cow;
/// # use http::header::HeaderValue;
/// # use fastly::Request;
/// let world_value = HeaderValue::from_bytes(b"\xF0\x90\x80 world!").unwrap();
/// let universe_value = HeaderValue::from_bytes(b"\xF0\x90\x80 universe!").unwrap();
/// let req = Request::get("https://example.com")
/// .with_header("hello", world_value)
/// .with_header("hello", universe_value);
/// let values = req.get_header_all_str_lossy("hello");
/// assert_eq!(values.len(), 2);
/// assert!(values.contains(&Cow::from("� world!")));
/// assert!(values.contains(&Cow::from("� universe!")));
/// ```
pub fn get_header_all_str_lossy(&self, name: impl ToHeaderName) -> Vec<Cow<'_, str>> {
self.get_header_all(name)
.map(|hdr| String::from_utf8_lossy(hdr.as_bytes()))
.collect()
}
/// Get an iterator of all the values of a header.
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// You can turn the iterator into collection, like [`Vec`]:
///
/// ```no_run
/// # use fastly::Request;
/// # use fastly::http::HeaderValue;
/// let invalid_utf8 = &"🐈".as_bytes()[0..3];
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("hello", invalid_utf8);
///
/// let values: Vec<&HeaderValue> = req.get_header_all("hello").collect();
/// assert_eq!(values.len(), 2);
/// assert!(values.contains(&&HeaderValue::from_static("world!")));
/// assert!(values.contains(&&HeaderValue::from_bytes(invalid_utf8).unwrap()));
/// ```
///
/// You can use the iterator in a loop:
///
/// ```no_run
/// # use fastly::Request;
/// let invalid_utf8 = &"🐈".as_bytes()[0..3];
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("hello", invalid_utf8);
///
/// for value in req.get_header_all("hello") {
/// if let Ok(s) = std::str::from_utf8(value.as_bytes()) {
/// println!("hello, {}", s);
/// } else {
/// println!("hello, invalid UTF-8!");
/// }
/// }
/// ```
pub fn get_header_all(&self, name: impl ToHeaderName) -> impl Iterator<Item = &HeaderValue> {
self.headers.get_all(name.into_borrowable().as_ref()).iter()
}
/// Get an iterator of all the request's header names and values.
///
/// # Examples
///
/// You can turn the iterator into a collection, like [`Vec`]:
///
/// ```no_run
/// # use fastly::Request;
/// # use fastly::http::header::{HeaderName, HeaderValue};
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("hello", "universe!");
///
/// let headers: Vec<(&HeaderName, &HeaderValue)> = req.get_headers().collect();
/// assert_eq!(headers.len(), 2);
/// assert!(headers.contains(&(&HeaderName::from_static("hello"), &HeaderValue::from_static("world!"))));
/// assert!(headers.contains(&(&HeaderName::from_static("hello"), &HeaderValue::from_static("universe!"))));
/// ```
///
/// You can use the iterator in a loop:
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("hello", "universe!");
///
/// for (n, v) in req.get_headers() {
/// println!("Header - {}: {:?}", n, v);
/// }
/// ```
pub fn get_headers(&self) -> impl Iterator<Item = (&HeaderName, &HeaderValue)> {
self.headers.iter()
}
/// Get all of the request's header names as strings, or an empty vector if no headers are
/// present.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("goodbye", "latency!");
/// let names = req.get_header_names_str();
/// assert_eq!(names.len(), 2);
/// assert!(names.contains(&"hello"));
/// assert!(names.contains(&"goodbye"));
/// ```
pub fn get_header_names_str(&self) -> Vec<&str> {
self.get_header_names().map(|n| n.as_str()).collect()
}
/// Get an iterator of all the request's header names.
///
/// # Examples
///
/// You can turn the iterator into collection, like [`Vec`]:
///
/// ```no_run
/// # use fastly::Request;
/// # use fastly::http::header::HeaderName;
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("goodbye", "latency!");
///
/// let values: Vec<&HeaderName> = req.get_header_names().collect();
/// assert_eq!(values.len(), 2);
/// assert!(values.contains(&&HeaderName::from_static("hello")));
/// assert!(values.contains(&&HeaderName::from_static("goodbye")));
/// ```
///
/// You can use the iterator in a loop:
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com")
/// .with_header("hello", "world!")
/// .with_header("goodbye", "latency!");
///
/// for name in req.get_header_names() {
/// println!("saw header: {:?}", name);
/// }
/// ```
pub fn get_header_names(&self) -> impl Iterator<Item = &HeaderName> {
self.headers.keys()
}
/// Set a request header to the given value, discarding any previous values for the given
/// header name.
///
#[doc = include_str!("../../docs/snippets/header-name-value-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com");
///
/// req.set_header("hello", "world!");
/// assert_eq!(req.get_header_str("hello"), Some("world!"));
///
/// req.set_header("hello", "universe!");
///
/// let values = req.get_header_all_str("hello");
/// assert_eq!(values.len(), 1);
/// assert!(!values.contains(&"world!"));
/// assert!(values.contains(&"universe!"));
/// ```
pub fn set_header(&mut self, name: impl ToHeaderName, value: impl ToHeaderValue) {
self.headers.insert(name.into_owned(), value.into_owned());
}
/// Add a request header with given value.
///
/// Unlike [`set_header()`][`Self::set_header()`], this does not discard existing values for the
/// same header name.
///
#[doc = include_str!("../../docs/snippets/header-name-value-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com");
///
/// req.set_header("hello", "world!");
/// assert_eq!(req.get_header_str("hello"), Some("world!"));
///
/// req.append_header("hello", "universe!");
///
/// let values = req.get_header_all_str("hello");
/// assert_eq!(values.len(), 2);
/// assert!(values.contains(&"world!"));
/// assert!(values.contains(&"universe!"));
/// ```
pub fn append_header(&mut self, name: impl ToHeaderName, value: impl ToHeaderValue) {
self.headers.append(name.into_owned(), value.into_owned());
}
/// Remove all request headers of the given name, and return one of the removed header values
/// if any were present.
///
#[doc = include_str!("../../docs/snippets/removes-one-header.md")]
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// # use fastly::http::HeaderValue;
/// let mut req = Request::get("https://example.com").with_header("hello", "world!");
/// assert_eq!(req.get_header_str("hello"), Some("world!"));
/// assert_eq!(req.remove_header("hello"), Some(HeaderValue::from_static("world!")));
/// assert!(req.remove_header("not-present").is_none());
/// ```
pub fn remove_header(&mut self, name: impl ToHeaderName) -> Option<HeaderValue> {
self.headers.remove(name.into_borrowable().as_ref())
}
/// Remove all request headers of the given name, and return one of the removed header values as
/// a string if any were present.
///
#[doc = include_str!("../../docs/snippets/removes-one-header.md")]
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Panics
///
#[doc = include_str!("../../docs/snippets/panics-reqresp-remove-header-utf8.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com").with_header("hello", "world!");
/// assert_eq!(req.get_header_str("hello"), Some("world!"));
/// assert_eq!(req.remove_header_str("hello"), Some("world!".to_string()));
/// assert!(req.remove_header_str("not-present").is_none());
/// ```
pub fn remove_header_str(&mut self, name: impl ToHeaderName) -> Option<String> {
let name = name.into_borrowable();
if let Some(hdr) = self.remove_header(name.as_ref()) {
Some(
std::str::from_utf8(hdr.as_bytes())
.map(|s| s.to_owned())
.unwrap_or_else(|_| panic!("non-UTF-8 HTTP header value for header: {}", name)),
)
} else {
None
}
}
/// Remove all request headers of the given name, and return one of the removed header values
/// as a string, including invalid characters, if any were present.
///
#[doc = include_str!("../../docs/snippets/utf8-replacement.md")]
///
#[doc = include_str!("../../docs/snippets/removes-one-header.md")]
///
#[doc = include_str!("../../docs/snippets/header-name-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// # use http::header::HeaderValue;
/// # use std::borrow::Cow;
/// let header_value = HeaderValue::from_bytes(b"\xF0\x90\x80 world!").unwrap();
/// let mut req = Request::get("https://example.com")
/// .with_header("hello", header_value);
/// assert_eq!(req.get_header_str_lossy("hello"), Some(Cow::from("� world")));
/// assert_eq!(req.remove_header_str_lossy("hello"), Some(String::from("� world")));
/// assert!(req.remove_header_str_lossy("not-present").is_none());
/// ```
pub fn remove_header_str_lossy(&mut self, name: impl ToHeaderName) -> Option<String> {
self.remove_header(name)
.map(|hdr| String::from_utf8_lossy(hdr.as_bytes()).into_owned())
}
/// Builder-style equivalent of [`set_method()`][`Self::set_method()`].
pub fn with_method(mut self, method: impl ToMethod) -> Self {
self.set_method(method);
self
}
/// Get the request method as a string.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com");
/// assert_eq!(req.get_method_str(), "GET");
pub fn get_method_str(&self) -> &str {
self.get_method().as_str()
}
/// Get the request method.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// use fastly::http::Method;
/// fn log_method(req: &Request) {
/// match req.get_method() {
/// &Method::GET | &Method::HEAD => println!("method was a GET or HEAD"),
/// &Method::POST => println!("method was a POST"),
/// _ => println!("method was something else"),
/// }
/// }
pub fn get_method(&self) -> &Method {
&self.method
}
/// Set the request method.
///
#[doc = include_str!("../../docs/snippets/method-argument.md")]
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// use fastly::http::Method;
///
/// let mut req = Request::get("https://example.com");
/// req.set_method(Method::POST);
/// assert_eq!(req.get_method(), &Method::POST);
/// ```
pub fn set_method<'a>(&mut self, method: impl ToMethod) {
self.method = method.into_owned();
}
/// Builder-style equivalent of [`set_url()`][`Self::set_url()`].
pub fn with_url(mut self, url: impl ToUrl) -> Self {
self.set_url(url);
self
}
/// Get the request URL as a string.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com");
/// assert_eq!(req.get_url_str(), "https://example.com");
/// ```
pub fn get_url_str(&self) -> &str {
self.get_url().as_str()
}
/// Get a shared reference to the request URL.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com/hello#world");
/// let url = req.get_url();
/// assert_eq!(url.host_str(), Some("example.com"));
/// assert_eq!(url.path(), "/hello");
/// assert_eq!(url.fragment(), Some("world"));
/// ```
pub fn get_url(&self) -> &Url {
&self.url
}
/// Get a mutable reference to the request URL.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com/");
///
/// let url = req.get_url_mut();
/// url.set_path("/hello");
/// url.set_fragment(Some("world"));
///
/// assert_eq!(req.get_url_str(), "https://example.com/hello#world");
/// ```
pub fn get_url_mut(&mut self) -> &mut Url {
&mut self.url
}
/// Set the request URL.
///
#[doc = include_str!("../../docs/snippets/url-argument.md")]
pub fn set_url(&mut self, url: impl ToUrl) {
self.url = url.into_owned();
}
/// Get the path component of the request URL.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com/hello#world");
/// assert_eq!(req.get_path(), "/hello");
/// ```
pub fn get_path(&self) -> &str {
self.get_url().path()
}
/// Builder-style equivalent of [`set_path()`][`Self::set_path()`].
pub fn with_path(mut self, path: &str) -> Self {
self.set_path(path);
self
}
/// Set the path component of the request URL.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com/");
/// req.set_path("/hello");
/// assert_eq!(req.get_url_str(), "https://example.com/hello");
/// ```
pub fn set_path(&mut self, path: &str) {
self.get_url_mut().set_path(path);
}
/// Get the query component of the request URL, if it exists, as a percent-encoded ASCII string.
///
/// This is a shorthand for `self.get_url().query()`; see [`Url::query()`] for details and other
/// query manipulation functions.
pub fn get_query_str(&self) -> Option<&str> {
self.get_url().query()
}
/// Get the value of a query parameter in the request's URL.
///
/// This assumes that the query string is a `&` separated list of `parameter=value` pairs. The
/// value of the first occurrence of `parameter` is returned. No URL decoding is performed.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com/page?foo=bar&baz=qux");
/// assert_eq!(req.get_query_parameter("foo"), Some("bar"));
/// assert_eq!(req.get_query_parameter("baz"), Some("qux"));
/// assert_eq!(req.get_query_parameter("other"), None);
/// ```
pub fn get_query_parameter(&self, parameter: &str) -> Option<&str> {
self.get_url().query().and_then(|qs| {
qs.split('&').find_map(|part| {
part.strip_prefix(parameter)
.and_then(|maybe| maybe.strip_prefix('='))
})
})
}
/// Attempt to parse the query component of the request URL into the specified datatype.
///
#[doc = include_str!("../../docs/snippets/returns-deserializeowned.md")]
///
/// # Errors
///
/// This method returns [`serde_urlencoded::de::Error`] if deserialization fails.
///
/// # Examples
///
/// Parsing into a vector of string pairs:
///
/// ```no_run
/// # use fastly::Request;
/// let req = Request::get("https://example.com/foo?hello=%F0%9F%8C%90!&bar=baz");
/// let pairs: Vec<(String, String)> = req.get_query().unwrap();
/// assert_eq!((pairs[0].0.as_str(), pairs[0].1.as_str()), ("hello", "🌐!"));
/// ```
///
/// Parsing into a mapping between strings (note that duplicates are removed since
/// [`HashMap`][`std::collections::HashMap`] is not a multimap):
///
/// ```no_run
/// # use fastly::Request;
/// use std::collections::HashMap;
/// let req = Request::get("https://example.com/foo?hello=%F0%9F%8C%90!&bar=baz&bar=quux");
/// let map: HashMap<String, String> = req.get_query().unwrap();
/// assert_eq!(map.len(), 2);
/// assert_eq!(map["hello"].as_str(), "🌐!");
/// ```
///
/// Parsing into a custom type that derives [`serde::de::Deserialize`]:
///
/// ```no_run
/// # use fastly::Request;
/// #[derive(serde::Deserialize)]
/// struct MyData {
/// name: String,
/// count: u64,
/// }
/// let mut req = Request::get("https://example.com/?name=Computers&count=1024");
/// let my_data = req.take_body_form::<MyData>().unwrap();
/// assert_eq!(&my_data.name, "Computers");
/// assert_eq!(my_data.count, 1024);
/// ```
pub fn get_query<T: DeserializeOwned>(&self) -> Result<T, serde_urlencoded::de::Error> {
serde_urlencoded::from_str(self.url.query().unwrap_or(""))
}
/// Builder-style equivalent of [`set_query_str()`][`Self::set_query_str()`].
pub fn with_query_str(mut self, query: impl AsRef<str>) -> Self {
self.set_query_str(query);
self
}
/// Set the query string of the request URL query component to the given string, performing
/// percent-encoding if necessary.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com/foo");
/// req.set_query_str("hello=🌐!&bar=baz");
/// assert_eq!(req.get_url_str(), "https://example.com/foo?hello=%F0%9F%8C%90!&bar=baz");
/// ```
pub fn set_query_str(&mut self, query: impl AsRef<str>) {
self.get_url_mut().set_query(Some(query.as_ref()))
}
/// Builder-style equivalent of [`set_query()`][`Self::set_query()`].
pub fn with_query(
mut self,
query: &impl Serialize,
) -> Result<Self, serde_urlencoded::ser::Error> {
self.set_query(query)?;
Ok(self)
}
/// Convert the given value to `application/x-www-form-urlencoded` format and set that data as
/// the request URL query component.
///
/// The given value must implement [`serde::Serialize`]; see the trait documentation for
/// details.
///
/// # Errors
///
/// This method returns [`serde_urlencoded::ser::Error`] if serialization fails.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// #[derive(serde::Serialize)]
/// struct MyData {
/// name: String,
/// count: u64,
/// }
/// let my_data = MyData { name: "Computers".to_string(), count: 1024 };
/// let mut req = Request::get("https://example.com/foo");
/// req.set_query(&my_data).unwrap();
/// assert_eq!(req.get_url_str(), "https://example.com/foo?name=Computers&count=1024");
/// ```
pub fn set_query(
&mut self,
query: &impl Serialize,
) -> Result<(), serde_urlencoded::ser::Error> {
let s = serde_urlencoded::to_string(query)?;
self.get_url_mut().set_query(Some(&s));
Ok(())
}
/// Remove the query component from the request URL, if one exists.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// let mut req = Request::get("https://example.com/foo?hello=%F0%9F%8C%90!&bar=baz");
/// req.remove_query();
/// assert_eq!(req.get_url_str(), "https://example.com/foo");
/// ```
pub fn remove_query(&mut self) {
self.get_url_mut().set_query(None);
}
/// Builder-style equivalent of [`set_version()`][`Self::set_version()`].
pub fn with_version(mut self, version: Version) -> Self {
self.set_version(version);
self
}
/// Get the HTTP version of this request.
pub fn get_version(&self) -> Version {
self.version
}
/// Set the HTTP version of this request.
pub fn set_version(&mut self, version: Version) {
self.version = version;
}
/// Builder-style equivalent of [`set_pass()`][`Self::set_pass()`].
pub fn with_pass(mut self, pass: bool) -> Self {
self.set_pass(pass);
self
}
/// Set whether this request should be cached if sent to a backend.
///
/// By default this is `false`, which means the backend will only be reached if a cached
/// response is not available. Set this to `true` to send the request directly to the backend
/// without caching.
///
/// # Overrides
///
/// Setting this to `true` overrides any other custom caching behaviors for this request, such
/// as [`Request::set_ttl()`] or [`Request::set_surrogate_key()`].
pub fn set_pass(&mut self, pass: bool) {
self.cache_override.set_pass(pass);
}
/// Builder-style equivalent of [`set_ttl()`][`Self::set_ttl()`].
pub fn with_ttl(mut self, ttl: u32) -> Self {
self.set_ttl(ttl);
self
}
/// Override the caching behavior of this request to use the given Time to Live (TTL), in seconds.
///
/// # Overrides
///
/// This overrides the behavior specified in the response headers, and sets the
/// [`pass`][`Self::set_pass()`] behavior to `false`.
pub fn set_ttl(&mut self, ttl: u32) {
self.cache_override.set_ttl(ttl);
}
/// Builder-style equivalent of [`set_stale_while_revalidate()`][`Self::set_stale_while_revalidate()`].
pub fn with_stale_while_revalidate(mut self, swr: u32) -> Self {
self.set_stale_while_revalidate(swr);
self
}
/// Override the caching behavior of this request to use the given `stale-while-revalidate`
/// time, in seconds.
///
/// # Overrides
///
/// This overrides the behavior specified in the response headers, and sets the
/// [`pass`][`Self::set_pass()`] behavior to `false`.
pub fn set_stale_while_revalidate(&mut self, swr: u32) {
self.cache_override.set_stale_while_revalidate(swr);
}
/// Builder-style equivalent of [`set_pci()`][`Self::set_pci()`].
pub fn with_pci(mut self, pci: bool) -> Self {
self.set_pci(pci);
self
}
/// Override the caching behavior of this request to enable or disable PCI/HIPAA-compliant
/// non-volatile caching.
///
/// By default, this is `false`, which means the request may not be PCI/HIPAA-compliant. Set it
/// to `true` to enable compliant caching.
///
/// See the [Fastly PCI-Compliant Caching and Delivery
/// documentation](https://docs.fastly.com/products/pci-compliant-caching-and-delivery) for
/// details.
///
/// # Overrides
///
/// This sets the [`pass`][`Self::set_pass()`] behavior to `false`.
pub fn set_pci(&mut self, pci: bool) {
self.cache_override.set_pci(pci);
}
/// Builder-style equivalent of [`set_surrogate_key()`][`Self::set_surrogate_key()`].
pub fn with_surrogate_key(mut self, sk: HeaderValue) -> Self {
self.set_surrogate_key(sk);
self
}
/// Override the caching behavior of this request to include the given surrogate key(s),
/// provided as a header value.
///
/// The header value can contain more than one surrogate key, separated by spaces.
///
/// Surrogate keys must contain only printable ASCII characters (those between `0x21` and
/// `0x7E`, inclusive). Any invalid keys will be ignored.
///
/// See the [Fastly surrogate keys
/// guide](https://docs.fastly.com/en/guides/purging-api-cache-with-surrogate-keys) for details.
///
/// # Overrides
///
/// This sets the [`pass`][`Self::set_pass()`] behavior to `false`, and extends (but does not
/// replace) any `Surrogate-Key` response headers from the backend.
pub fn set_surrogate_key(&mut self, sk: HeaderValue) {
self.cache_override.set_surrogate_key(sk);
}
/// Returns the IP address of the client making the HTTP request.
///
/// Returns `None` if this is not the client request.
pub fn get_client_ip_addr(&self) -> Option<IpAddr> {
if !self.is_from_client() {
return None;
}
self::handle::client_ip_addr()
}
/// Returns the client request's header names exactly as they were originally received.
///
/// This includes both the original character cases, as well as the original order of the
/// received headers.
///
/// Returns `None` if this is not the client request.
pub fn get_original_header_names(&self) -> Option<impl Iterator<Item = String>> {
if !self.is_from_client() {
return None;
} else {
Some(
self::handle::client_original_header_names_impl(INITIAL_HEADER_NAME_BUF_SIZE, None)
.map(|res| res.expect("original request header name too large")),
)
}
}
/// Returns the number of headers in the client request as originally received.
///
/// Returns `None` if this is not the client request.
pub fn get_original_header_count(&self) -> Option<u32> {
if !self.is_from_client() {
return None;
}
Some(self::handle::client_original_header_count())
}
/// Get the HTTP/2 fingerprint of client request if available
///
/// Returns `None` if this is not the client request.
#[doc(hidden)]
pub fn get_client_h2_fingerprint(&self) -> Option<&str> {
if !self.is_from_client() {
return None;
}
self::handle::client_h2_fingerprint()
}
/// Get the request id of the current request if available
///
/// Returns `None` if this is not the client request.
#[doc(hidden)]
pub fn get_client_request_id(&self) -> Option<&str> {
if !self.is_from_client() {
return None;
}
self::handle::client_request_id()
}
/// Get the fingerprint of client original request headers if available
///
/// Returns `None` if this is not the client request.
#[doc(hidden)]
pub fn get_client_oh_fingerprint(&self) -> Option<&str> {
if !self.is_from_client() {
return None;
}
self::handle::client_oh_fingerprint()
}
/// Get the raw bytes sent by the client in the TLS ClientHello message.
///
/// See [RFC 5246](https://tools.ietf.org/html/rfc5246#section-7.4.1.2) for details.
///
/// Returns `None` if this is not the client request.
pub fn get_tls_client_hello(&self) -> Option<&[u8]> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_client_hello()
}
/// Get the JA3 hash of the TLS ClientHello message.
///
/// Returns `None` if this is not available.
pub fn get_tls_ja3_md5(&self) -> Option<[u8; 16]> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_ja3_md5()
}
/// Get the JA4 hash of the TLS ClientHello message.
///
/// Returns `None` if this is not available.
pub fn get_tls_ja4(&self) -> Option<&str> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_ja4()
}
/// Get the raw client certificate in the mutual TLS handshake message as a
/// string, panicking if it is not UTF-8.
/// It is in PEM format.
/// Returns `None` if this is not mTLS or available.
pub fn get_tls_raw_client_certificate(&self) -> Option<&'static str> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_client_raw_certificate()
}
/// Like [`Self::get_tls_raw_client_certificate`], but supports non-UTF-8 byte sequences.
pub fn get_tls_raw_client_certificate_bytes(&self) -> Option<&'static [u8]> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_client_raw_certificate_bytes()
}
/// Returns the error code defined in ClientCertVerifyResult.
///
/// Returns `None` if this is not available.
pub fn get_tls_client_cert_verify_result(&self) -> Option<ClientCertVerifyResult> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_client_cert_verify_result()
}
/// Get the cipher suite used to secure the client TLS connection, as a string,
/// panicking if it is not UTF-8.
///
/// The value returned will be consistent with the [OpenSSL
/// name](https://testssl.sh/openssl-iana.mapping.html) for the cipher suite.
///
/// Returns `None` if this is not the client request.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// assert_eq!(Request::from_client().get_tls_cipher_openssl_name().unwrap(), "ECDHE-RSA-AES128-GCM-SHA256");
/// ```
pub fn get_tls_cipher_openssl_name(&self) -> Option<&'static str> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_cipher_openssl_name()
}
/// Like [`Self::get_tls_cipher_openssl_name_bytes`], but supports non-UTF-8 byte strings.
pub fn get_tls_cipher_openssl_name_bytes(&self) -> Option<&'static [u8]> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_cipher_openssl_name_bytes()
}
/// Get the TLS protocol version used to secure the client TLS connection, as a string,
/// panicking if it is not UTF-8.
///
/// Returns `None` if this is not the client request.
///
/// # Examples
///
/// ```no_run
/// # use fastly::Request;
/// assert_eq!(Request::from_client().get_tls_protocol().unwrap(), "TLSv1.2");
/// ```
pub fn get_tls_protocol(&self) -> Option<&'static str> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_protocol()
}
/// Like [`Self::get_tls_protocol`], but supports non-UTF-8 byte strings.
pub fn get_tls_protocol_bytes(&self) -> Option<&'static [u8]> {
if !self.is_from_client() {
return None;
}
self::handle::client_tls_protocol_bytes()
}
/// Set whether a `gzip`-encoded response to this request will be automatically decompressed.
///
/// If the response to this request is `gzip`-encoded, it will be presented in decompressed
/// form, and the `Content-Encoding` and `Content-Length` headers will be removed.
pub fn set_auto_decompress_gzip(&mut self, gzip: bool) {
self.auto_decompress_response
.set(ContentEncodings::GZIP, gzip);
}
/// Builder-style equivalent of
/// [`set_auto_decompress_gzip()`][`Self::set_auto_decompress_gzip()`].
pub fn with_auto_decompress_gzip(mut self, gzip: bool) -> Self {
self.set_auto_decompress_gzip(gzip);
self
}
/// Sets how `Content-Length` and `Transfer-Encoding` will be determined when sending this
/// request.
///
/// See [`FramingHeadersMode`] for details on the options.
pub fn set_framing_headers_mode(&mut self, mode: FramingHeadersMode) {
self.framing_headers_mode = mode;
}
/// Builder-style equivalent of
/// [`set_framing_headers_mode()`][`Self::set_framing_headers_mode()`].
pub fn with_framing_headers_mode(mut self, mode: FramingHeadersMode) -> Self {
self.set_framing_headers_mode(mode);
self
}
/// Create a [`Request`] from the low-level [`handle` API][`crate::handle`].
pub fn from_handles(req_handle: RequestHandle, body_handle: Option<BodyHandle>) -> Self {
let method = req_handle
.get_method_impl(INITIAL_METHOD_BUF_SIZE, None)
.expect("buffer size limits should not exist");
let url = req_handle
.get_url_impl(INITIAL_URL_BUF_SIZE, None)
.expect("buffer size limits should not exist");
let mut req = Request::new(method, url).with_version(req_handle.get_version());
req.is_from_client = true;
for name in req_handle.get_header_names_impl(INITIAL_HEADER_NAME_BUF_SIZE, None) {
let name = name.expect("buffer size limits should not exist");
for value in
req_handle.get_header_values_impl(&name, INITIAL_HEADER_VALUE_BUF_SIZE, None)
{
let value = value.expect("buffer size limits should not exist");
req.append_header(&name, value);
}
}
if let Some(body) = body_handle {
req.set_body(body);
}
req
}
/// Convert a [`Request`] into the low-level [`handle` API][`crate::handle`].
pub fn into_handles(mut self) -> (RequestHandle, Option<BodyHandle>) {
self.to_handles()
}
/// Make a low-level [`RequestHandle`] like [`Request::into_handles()`].
/// Do not create multiple request handles from one [`Request].
pub(crate) fn make_request_handle(&self) -> RequestHandle {
let mut req_handle = RequestHandle::new();
// Set the handle's version, method, URI, cache override, and auto decompression
// settings using the request.
req_handle.set_version(self.version);
req_handle.set_method(&self.method);
req_handle.set_url(&self.url);
req_handle.set_cache_override(&self.cache_override);
req_handle.set_auto_decompress_response(self.auto_decompress_response);
req_handle.set_framing_headers_mode(self.framing_headers_mode);
for name in self.headers.keys() {
// Copy the request's header values to the handle.
req_handle.set_header_values(name, self.headers.get_all(name));
}
// For now, we'll only compute cache keys for services opting into the experiment.
if let Some(exp_key_override) = self.cache_key.as_ref().map(|gen| match gen {
CacheKeyGen::Lazy(f) => f(self),
CacheKeyGen::Set(k) => *k,
}) {
use crate::experimental::RequestHandleCacheKey;
req_handle.set_cache_key(&exp_key_override);
}
req_handle
}
/// Make handles from a `Request`.
///
/// Note that this is private in order to maintain the right ownership model in the public API.
fn to_handles(&mut self) -> (RequestHandle, Option<BodyHandle>) {
let req_handle = self.make_request_handle();
let body_handle = if let Some(body) = self.try_take_body() {
Some(body.into_handle())
} else {
None
};
(req_handle, body_handle)
}
/// Returns whether or not the client request had a `Fastly-Key` header which is valid for
/// purging content for the service.
///
/// This function ignores the current value of any `Fastly-Key` header for this request.
pub fn fastly_key_is_valid(&self) -> bool {
if !self.is_from_client() {
return false;
}
self::handle::fastly_key_is_valid()
}
/// Pass the WebSocket directly to a backend.
///
/// This can only be used on services that have the WebSockets feature enabled and on requests
/// that are valid WebSocket requests.
///
/// The sending completes in the background. Once this method has been called, no other
/// response can be sent to this request, and the application can exit without affecting the
/// send.
pub fn handoff_websocket(self, backend: &str) -> Result<(), SendError> {
assert_single_downstream_response_is_sent(true);
let req_handle = self.make_request_handle();
let status = self::handle::redirect_to_websocket_proxy(req_handle, backend);
if status.is_err() {
Err(SendError::new(
backend,
self,
SendErrorCause::status(status),
))
} else {
Ok(())
}
}
/// Pass the request through the Fanout GRIP proxy and on to a backend.
///
/// This can only be used on services that have the Fanout feature enabled.
///
/// The sending completes in the background. Once this method has been called, no other
/// response can be sent to this request, and the application can exit without affecting the
/// send.
pub fn handoff_fanout(self, backend: &str) -> Result<(), SendError> {
assert_single_downstream_response_is_sent(true);
let req_handle = self.make_request_handle();
let status = self::handle::redirect_to_grip_proxy(req_handle, backend);
if status.is_err() {
Err(SendError::new(
backend,
self,
SendErrorCause::status(status),
))
} else {
Ok(())
}
}
}
/// Anything that we need to make a full roundtrip through the `http` types that doesn't have a more
/// concrete corresponding type.
#[derive(Clone, Debug, Default)]
struct FastlyExts {
cache_override: CacheOverride,
is_from_client: bool,
auto_decompress_response: ContentEncodings,
framing_headers_mode: FramingHeadersMode,
cache_key: Option<CacheKeyGen>,
}
impl Into<http::Request<Body>> for Request {
fn into(self) -> http::Request<Body> {
let mut req = http::Request::new(self.body.unwrap_or_else(|| Body::new()));
req.extensions_mut().insert(FastlyExts {
cache_override: self.cache_override,
is_from_client: self.is_from_client,
auto_decompress_response: self.auto_decompress_response,
framing_headers_mode: self.framing_headers_mode,
cache_key: self.cache_key,
});
*req.headers_mut() = self.headers;
*req.method_mut() = self.method;
*req.uri_mut() = String::from(self.url)
.parse()
.expect("Url to Uri conversion shouldn't fail, but did");
*req.version_mut() = self.version;
req
}
}
impl From<http::Request<Body>> for Request {
fn from(from: http::Request<Body>) -> Self {
let (mut parts, body) = from.into_parts();
let FastlyExts {
cache_override,
is_from_client,
auto_decompress_response,
framing_headers_mode,
cache_key,
} = parts.extensions.remove().unwrap_or_default();
Request {
version: parts.version,
method: parts.method,
url: Url::parse(&parts.uri.to_string())
.expect("Uri to Url conversion shouldn't fail, but did"),
headers: parts.headers,
body: Some(body),
cache_override,
is_from_client,
auto_decompress_response,
framing_headers_mode,
cache_key,
}
}
}
/// The reason that a request sent to a backend failed.
#[non_exhaustive]
#[derive(Debug, Error)]
pub enum SendErrorCause {
/// The system encountered a timeout when trying to find an IP address for the backend
/// hostname.
#[error("DNS timeout")]
DnsTimeout,
/// The system encountered a DNS error when trying to find an IP address for the backend
/// hostname. The fields $dns_error_rcode and $dns_error_info_code may be set in the
/// $send_error_detail.
// TODO ACF 2023-08-18: figure out what to do with the fields. probably would be best to seal
// the details of `SendErrorCause` and make folks use accessor methods or `Display`
#[error("DNS error (rcode={rcode:?}, info_code={info_code:?})")]
DnsError {
/// The DNS rcode, if available.
rcode: Option<u16>,
/// The DNS info-code, if available.
info_code: Option<u16>,
},
/// The system cannot determine which backend to use, or the specified backend was invalid.
#[error("Destination not found")]
DestinationNotFound,
/// The system considers the backend to be unavailable; e.g., recent attempts to communicate
/// with it may have failed, or a health check may indicate that it is down.
#[error("Destination unavailable")]
DestinationUnavailable,
/// The system cannot find a route to the next-hop IP address.
#[error("Destination IP unroutable")]
DestinationIpUnroutable,
/// The system's connection to the backend was refused.
#[error("Connection refused")]
ConnectionRefused,
/// The system's connection to the backend was closed before a complete response was
/// received.
#[error("Connection terminated")]
ConnectionTerminated,
/// The system's attempt to open a connection to the backend timed out.
#[error("Connection timeout")]
ConnectionTimeout,
/// The system is configured to limit the number of connections it has to the backend, and
/// that limit has been exceeded.
#[error("Connection limit reached")]
ConnectionLimitReached,
/// The system encountered a TLS error when communicating with the backend, either during the
/// handshake or afterwards.
#[error("TLS protocol error")]
TlsProtocolError,
/// The system encountered an error when verifying the certificate presented by the backend.
#[error("TLS certificate error")]
TlsCertificateError,
/// The system received a TLS alert from the backend. The field $tls_alert_id may be set in the
/// $send_error_detail.
#[error("TLS alert received (alert_id={alert_id:?})")]
TlsAlertReceived {
/// The [TLS alert
/// value](https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-6),
/// if available.
alert_id: Option<u8>,
},
/// The system encountered an error with the backend TLS configuration.
#[error("TLS configuration error")]
TlsConfigurationError,
/// The system received an incomplete response to the request from the backend.
#[error("Incomplete HTTP response")]
HttpIncompleteResponse,
/// The system received a response to the request whose header section was considered too
/// large.
#[error("HTTP response header section too large")]
HttpResponseHeaderSectionTooLarge,
/// The system received a response to the request whose body was considered too large.
#[error("HTTP response body too large")]
HttpResponseBodyTooLarge,
/// The system reached a configured time limit waiting for the complete response.
#[error("HTTP response timeout")]
HttpResponseTimeout,
/// The system received a response to the request whose status code or reason phrase was invalid.
#[error("HTTP response status invalid")]
HttpResponseStatusInvalid,
/// The process of negotiating an upgrade of the HTTP version between the system and backend
/// failed.
#[error("HTTP upgrade failed")]
HttpUpgradeFailed,
/// The system encountered an HTTP protocol error when communicating with the backend. This
/// error will only be used when a more specific one is not defined.
#[error("HTTP protocol error")]
HttpProtocolError,
/// An invalid cache key was provided for the request.
#[error("HTTP request cache key invalid")]
HttpRequestCacheKeyInvalid,
/// An invalid URI was provided for the request.
#[error("HTTP request URI invalid")]
HttpRequestUriInvalid,
/// The system encountered an unexpected internal error.
#[error("Internal error (status={0:?})")]
InternalError(Option<FastlyStatus>),
}
impl SendErrorCause {
pub(crate) fn status(cause: fastly_shared::FastlyStatus) -> Self {
match cause {
fastly_shared::FastlyStatus::HTTPINVALID => SendErrorCause::HttpProtocolError,
fastly_shared::FastlyStatus::HTTPINCOMPLETE => SendErrorCause::HttpIncompleteResponse,
fastly_shared::FastlyStatus::HTTPHEADTOOLARGE => {
SendErrorCause::HttpResponseHeaderSectionTooLarge
}
fastly_shared::FastlyStatus::HTTPINVALIDSTATUS => {
SendErrorCause::HttpResponseStatusInvalid
}
other => SendErrorCause::InternalError(Some(other)),
}
}
/// Return `Err(SendErrorCause)` based on the provided `SendErrorDetail` ABI struct and optional
/// `FastlyStatus`, or `Ok(())` if no error occurred.
///
/// This is useful for `?`ing out of a function after calling an ABI function that returns both
/// a `SendErrorDetail` and a `FastlyStatus`, allowing control flow to continue only if the call
/// was successful.
///
/// If `detail.tag` is `Ok`, or if `Some(FastlyStatus::OK)` is provided, the result is `Ok(())`.
///
/// If no `FastlyStatus` is provided, the result is determined entirely from the
/// `SendErrorDetail`. If both are provided, but the `SendErrorDetail` is uninitialized, the
/// behavior falls back to the legacy `FastlyStatus`-determined behavior.
pub(crate) fn detail_and_status(
detail: SendErrorDetail,
status: Option<FastlyStatus>,
) -> Result<(), Self> {
use fastly_sys::fastly_http_req::{SendErrorDetailMask as Mask, SendErrorDetailTag as Tag};
// if status is present and is OK, we're done
if status.as_ref().map(FastlyStatus::is_ok).unwrap_or(false) {
return Ok(());
}
match detail.tag {
Tag::Uninitialized => {
if let Some(status) = status {
// fall back to the legacy `FastlyStatus` logic if the details weren't populated
Err(SendErrorCause::status(status))
} else {
// otherwise fall back to the generic internal error
Err(SendErrorCause::InternalError(None))
}
}
Tag::Ok => Ok(()),
Tag::DnsTimeout => Err(SendErrorCause::DnsTimeout),
Tag::DnsError => {
let rcode = if detail.mask.contains(Mask::DNS_ERROR_RCODE) {
Some(detail.dns_error_rcode)
} else {
None
};
let info_code = if detail.mask.contains(Mask::DNS_ERROR_INFO_CODE) {
Some(detail.dns_error_info_code)
} else {
None
};
Err(Self::DnsError { rcode, info_code })
}
Tag::DestinationNotFound => Err(SendErrorCause::DestinationNotFound),
Tag::DestinationUnavailable => Err(SendErrorCause::DestinationUnavailable),
Tag::DestinationIpUnroutable => Err(SendErrorCause::DestinationIpUnroutable),
Tag::ConnectionRefused => Err(SendErrorCause::ConnectionRefused),
Tag::ConnectionTerminated => Err(SendErrorCause::ConnectionTerminated),
Tag::ConnectionTimeout => Err(SendErrorCause::ConnectionTimeout),
Tag::ConnectionLimitReached => Err(SendErrorCause::ConnectionLimitReached),
Tag::TlsProtocolError => Err(SendErrorCause::TlsProtocolError),
Tag::TlsCertificateError => Err(SendErrorCause::TlsCertificateError),
Tag::TlsAlertReceived => {
let alert_id = if detail.mask.contains(Mask::TLS_ALERT_ID) {
Some(detail.tls_alert_id)
} else {
None
};
Err(Self::TlsAlertReceived { alert_id })
}
Tag::TlsConfigurationError => Err(SendErrorCause::TlsConfigurationError),
Tag::HttpIncompleteResponse => Err(SendErrorCause::HttpIncompleteResponse),
Tag::HttpResponseHeaderSectionTooLarge => {
Err(SendErrorCause::HttpResponseHeaderSectionTooLarge)
}
Tag::HttpResponseBodyTooLarge => Err(SendErrorCause::HttpResponseBodyTooLarge),
Tag::HttpResponseTimeout => Err(SendErrorCause::HttpResponseTimeout),
Tag::HttpResponseStatusInvalid => Err(SendErrorCause::HttpResponseStatusInvalid),
Tag::HttpUpgradeFailed => Err(SendErrorCause::HttpUpgradeFailed),
Tag::HttpProtocolError => Err(SendErrorCause::HttpProtocolError),
Tag::HttpRequestCacheKeyInvalid => Err(SendErrorCause::HttpRequestCacheKeyInvalid),
Tag::HttpRequestUriInvalid => Err(SendErrorCause::HttpRequestUriInvalid),
Tag::InternalError => Err(SendErrorCause::InternalError(status)),
}
}
}
/// An error that occurred while sending a request.
///
/// While the body of a request is always consumed when sent, you can recover the headers and other
/// request metadata of the request that failed using `SendError::into_sent_req()`.
///
/// use [`SendError::root_cause()`] to inspect details about what caused the error.
#[derive(Debug, Error)]
#[error("error sending request: {error} to backend {backend}")]
pub struct SendError {
backend: String,
sent_req: Request,
#[source]
error: SendErrorCause,
}
impl SendError {
pub(crate) fn new(
backend: impl Into<String>,
sent_req: Request,
error: SendErrorCause,
) -> Self {
SendError {
backend: backend.into(),
sent_req,
error: error.into(),
}
}
/// Create a `SendError` from a `FastlyResponseMetadata` and an underlying error.
///
/// Panics if the metadata does not contain a backend and a sent request. This should only be
/// called in contexts where those are guaranteed to be present, like the metadata from a
/// `PendingRequest`.
pub(crate) fn from_resp_metadata(
mut metadata: FastlyResponseMetadata,
error: SendErrorCause,
) -> Self {
let sent_req = metadata.take_sent_req().expect("sent_req must be present");
let backend_name = metadata.backend().expect("backend must be present").name();
Self::new(backend_name, sent_req, error)
}
/// Create a `SendError` from a `PendingRequest` and an underlying error.
fn from_pending_req(pending_req: PendingRequest, error: SendErrorCause) -> Self {
Self::from_resp_metadata(pending_req.metadata, error)
}
/// Get the name of the backend that returned this error.
pub fn backend_name(&self) -> &str {
self.backend.as_str()
}
/// Get the underlying cause of this `SendError`.
///
/// This is the same cause that would be returned by `err.source().downcast_ref::<SendErrorCause>()`, but more direct.
pub fn root_cause(&self) -> &SendErrorCause {
&self.error
}
/// Convert the error back into the request that was originally sent.
///
/// Since the original request's body is consumed by sending it, the body in the returned
/// request is empty. To add a new body to the request, use [`Request::with_body()`], for example:
///
/// ```no_run
/// # use fastly::{Body, Error, Request};
/// # fn f(bereq: Request) -> Result<(), Error> {
/// if let Err(e) = bereq.send("my_backend") {
/// let new_body = Body::from("something new");
/// let new_req = e.into_sent_req().with_body(new_body);
/// new_req.send("my_other_backend")?;
/// }
/// # Ok(())
/// # }
/// ```
pub fn into_sent_req(self) -> Request {
self.sent_req
}
}
/// Check whether a request looks suitable for sending to a backend.
///
/// Note that this is *not* meant to be a filter for things that could cause security issues, it is
/// only meant to catch errors before the hostcalls do in order to yield friendlier error messages.
fn validate_request(req: &Request) -> Result<(), SendErrorCause> {
let scheme_ok = req.url.scheme().eq_ignore_ascii_case("http")
|| req.url.scheme().eq_ignore_ascii_case("https");
if scheme_ok && req.url.has_authority() {
Ok(())
} else {
Err(SendErrorCause::HttpRequestUriInvalid)
}
}