pub struct Body(_);
Expand description
Contains the body of a synchronous HTTP request or response.
This type is used to encapsulate the underlying stream or region of memory
where the contents of the body are stored. A Body
can be created from
many types of sources using the Into
trait or one of
its constructor functions. It can also be created from anything that
implements Read
, which Body
itself also implements.
For asynchronous requests, use AsyncBody
instead.
Implementations
sourceimpl Body
impl Body
sourcepub const fn empty() -> Self
pub const fn empty() -> Self
Create a new empty body.
An empty body represents the absence of a body, which is semantically different than the presence of a body of zero length.
sourcepub fn from_bytes_static<B>(bytes: B) -> Self where
B: AsRef<[u8]> + 'static,
pub fn from_bytes_static<B>(bytes: B) -> Self where
B: AsRef<[u8]> + 'static,
Create a new body from a potentially static byte buffer.
The body will have a known length equal to the number of bytes given.
This will try to prevent a copy if the type passed in can be re-used, otherwise the buffer will be copied first. This method guarantees to not require a copy for the following types:
&'static [u8]
&'static str
Examples
use isahc::Body;
// Create a body from a static string.
let body = Body::from_bytes_static("hello world");
sourcepub fn from_reader<R>(reader: R) -> Self where
R: Read + Send + Sync + 'static,
pub fn from_reader<R>(reader: R) -> Self where
R: Read + Send + Sync + 'static,
Create a streaming body that reads from the given reader.
The body will have an unknown length. When used as a request body, chunked transfer encoding might be used to send the request.
sourcepub fn from_reader_sized<R>(reader: R, length: u64) -> Self where
R: Read + Send + Sync + 'static,
pub fn from_reader_sized<R>(reader: R, length: u64) -> Self where
R: Read + Send + Sync + 'static,
Create a streaming body with a known length.
If the size of the body is known in advance, such as with a file, then
this function can be used to create a body that can determine its
Content-Length
while still reading the bytes asynchronously.
Giving a value for length
that doesn’t actually match how much data
the reader will produce may result in errors when sending the body in a
request.
sourcepub fn is_empty(&self) -> bool
pub fn is_empty(&self) -> bool
Report if this body is empty.
This is not necessarily the same as checking for self.len() == Some(0)
. Since HTTP message bodies are optional, there is a semantic
difference between the absence of a body and the presence of a
zero-length body. This method will only return true
for the former.
sourcepub fn len(&self) -> Option<u64>
pub fn len(&self) -> Option<u64>
Get the size of the body, if known.
The value reported by this method is used to set the Content-Length
for outgoing requests.
When coming from a response, this method will report the value of the
Content-Length
response header if present. If this method returns
None
then there’s a good chance that the server used something like
chunked transfer encoding to send the response body.
Since the length may be determined totally separately from the actual bytes, even if a value is returned it should not be relied on as always being accurate, and should be treated as a “hint”.
Trait Implementations
sourceimpl Read for Body
impl Read for Body
sourcefn read(&mut self, buf: &mut [u8]) -> Result<usize>
fn read(&mut self, buf: &mut [u8]) -> Result<usize>
Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
1.36.0 · sourcefn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>
fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>
Like read
, except that it reads into a slice of buffers. Read more
sourcefn is_read_vectored(&self) -> bool
fn is_read_vectored(&self) -> bool
can_vector
)Determines if this Read
er has an efficient read_vectored
implementation. Read more
1.0.0 · sourcefn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
Read all bytes until EOF in this source, placing them into buf
. Read more
1.0.0 · sourcefn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
Read all bytes until EOF in this source, appending them to buf
. Read more
1.6.0 · sourcefn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
Read the exact number of bytes required to fill buf
. Read more
sourcefn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
fn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
read_buf
)Pull some bytes from this source into the specified buffer. Read more
sourcefn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
fn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
read_buf
)Read the exact number of bytes required to fill buf
. Read more
1.0.0 · sourcefn by_ref(&mut self) -> &mut Self
fn by_ref(&mut self) -> &mut Self
Creates a “by reference” adaptor for this instance of Read
. Read more
Auto Trait Implementations
impl !RefUnwindSafe for Body
impl Send for Body
impl Sync for Body
impl Unpin for Body
impl !UnwindSafe for Body
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more