[−][src]Struct multer::Constraints
Represents some rules to be applied on the stream and field's content size to prevent DoS attacks.
It's recommended to add some rules on field (specially text field) size to avoid potential DoS attacks from attackers running the server out of memory.
This type provides some API to apply constraints on very granular level to make multipart/form-data
safe.
By default, it does not apply any constraint.
Examples
use multer::{Multipart, Constraints, SizeLimit}; // Create some constraints to be applied to the fields to prevent DoS attack. let constraints = Constraints::new() // We only accept `my_text_field` and `my_file_field` fields, // For any unknown field, we will throw an error. .allowed_fields(vec!["my_text_field", "my_file_field"]) .size_limit( SizeLimit::new() // Set 15mb as size limit for the whole stream body. .whole_stream(15 * 1024 * 1024) // Set 10mb as size limit for all fields. .per_field(10 * 1024 * 1024) // Set 30kb as size limit for our text field only. .for_field("my_text_field", 30 * 1024), ); // Create a `Multipart` instance from a stream and the constraints. let mut multipart = Multipart::new_with_constraints(some_stream, "X-BOUNDARY", constraints); while let Some(field) = multipart.next_field().await.unwrap() { let content = field.text().await.unwrap(); assert_eq!(content, "abcd"); }
Implementations
impl Constraints
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pub fn new() -> Constraints
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Creates a set of rules with default behaviour.
pub fn size_limit(self, size_limit: SizeLimit) -> Constraints
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Applies rules on field's content length.
pub fn allowed_fields<N: Into<String>>(
self,
allowed_fields: Vec<N>
) -> Constraints
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self,
allowed_fields: Vec<N>
) -> Constraints
Specify which fields should be allowed, for any unknown field, the next_field
will throw an error.
Trait Implementations
impl Default for Constraints
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Auto Trait Implementations
impl RefUnwindSafe for Constraints
impl Send for Constraints
impl Sync for Constraints
impl Unpin for Constraints
impl UnwindSafe for Constraints
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,