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//! The `Content-Disposition` header and associated types.
//!
//! # References
//! - "The Content-Disposition Header Field":
//! <https://datatracker.ietf.org/doc/html/rfc2183>
//! - "The Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP)":
//! <https://datatracker.ietf.org/doc/html/rfc6266>
//! - "Returning Values from Forms: multipart/form-data":
//! <https://datatracker.ietf.org/doc/html/rfc7578>
//! - Browser conformance tests at: <http://greenbytes.de/tech/tc2231/>
//! - IANA assignment: <http://www.iana.org/assignments/cont-disp/cont-disp.xhtml>
use std::fmt::{self, Write};
use once_cell::sync::Lazy;
use regex::Regex;
use super::{ExtendedValue, Header, TryIntoHeaderValue, Writer};
use crate::http::header;
/// Split at the index of the first `needle` if it exists or at the end.
fn split_once(haystack: &str, needle: char) -> (&str, &str) {
haystack.find(needle).map_or_else(
|| (haystack, ""),
|sc| {
let (first, last) = haystack.split_at(sc);
(first, last.split_at(1).1)
},
)
}
/// Split at the index of the first `needle` if it exists or at the end, trim the right of the
/// first part and the left of the last part.
fn split_once_and_trim(haystack: &str, needle: char) -> (&str, &str) {
let (first, last) = split_once(haystack, needle);
(first.trim_end(), last.trim_start())
}
/// The implied disposition of the content of the HTTP body.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum DispositionType {
/// Inline implies default processing.
Inline,
/// Attachment implies that the recipient should prompt the user to save the response locally,
/// rather than process it normally (as per its media type).
Attachment,
/// Used in *multipart/form-data* as defined in
/// [RFC 7578](https://datatracker.ietf.org/doc/html/rfc7578) to carry the field name and
/// optional filename.
FormData,
/// Extension type. Should be handled by recipients the same way as Attachment.
Ext(String),
}
impl<'a> From<&'a str> for DispositionType {
fn from(origin: &'a str) -> DispositionType {
if origin.eq_ignore_ascii_case("inline") {
DispositionType::Inline
} else if origin.eq_ignore_ascii_case("attachment") {
DispositionType::Attachment
} else if origin.eq_ignore_ascii_case("form-data") {
DispositionType::FormData
} else {
DispositionType::Ext(origin.to_owned())
}
}
}
/// Parameter in [`ContentDisposition`].
///
/// # Examples
/// ```
/// use actix_web::http::header::DispositionParam;
///
/// let param = DispositionParam::Filename(String::from("sample.txt"));
/// assert!(param.is_filename());
/// assert_eq!(param.as_filename().unwrap(), "sample.txt");
/// ```
#[derive(Debug, Clone, PartialEq, Eq)]
#[allow(clippy::large_enum_variant)]
pub enum DispositionParam {
/// For [`DispositionType::FormData`] (i.e. *multipart/form-data*), the name of an field from
/// the form.
Name(String),
/// A plain file name.
///
/// It is [not supposed](https://datatracker.ietf.org/doc/html/rfc6266#appendix-D) to contain
/// any non-ASCII characters when used in a *Content-Disposition* HTTP response header, where
/// [`FilenameExt`](DispositionParam::FilenameExt) with charset UTF-8 may be used instead
/// in case there are Unicode characters in file names.
Filename(String),
/// An extended file name. It must not exist for `ContentType::Formdata` according to
/// [RFC 7578 §4.2](https://datatracker.ietf.org/doc/html/rfc7578#section-4.2).
FilenameExt(ExtendedValue),
/// An unrecognized regular parameter as defined in
/// [RFC 5987 §3.2.1](https://datatracker.ietf.org/doc/html/rfc5987#section-3.2.1) as
/// `reg-parameter`, in
/// [RFC 6266 §4.1](https://datatracker.ietf.org/doc/html/rfc6266#section-4.1) as
/// `token "=" value`. Recipients should ignore unrecognizable parameters.
Unknown(String, String),
/// An unrecognized extended parameter as defined in
/// [RFC 5987 §3.2.1](https://datatracker.ietf.org/doc/html/rfc5987#section-3.2.1) as
/// `ext-parameter`, in
/// [RFC 6266 §4.1](https://datatracker.ietf.org/doc/html/rfc6266#section-4.1) as
/// `ext-token "=" ext-value`. The single trailing asterisk is not included. Recipients should
/// ignore unrecognizable parameters.
UnknownExt(String, ExtendedValue),
}
impl DispositionParam {
/// Returns `true` if the parameter is [`Name`](DispositionParam::Name).
#[inline]
pub fn is_name(&self) -> bool {
self.as_name().is_some()
}
/// Returns `true` if the parameter is [`Filename`](DispositionParam::Filename).
#[inline]
pub fn is_filename(&self) -> bool {
self.as_filename().is_some()
}
/// Returns `true` if the parameter is [`FilenameExt`](DispositionParam::FilenameExt).
#[inline]
pub fn is_filename_ext(&self) -> bool {
self.as_filename_ext().is_some()
}
/// Returns `true` if the parameter is [`Unknown`](DispositionParam::Unknown) and the `name`
#[inline]
/// matches.
pub fn is_unknown<T: AsRef<str>>(&self, name: T) -> bool {
self.as_unknown(name).is_some()
}
/// Returns `true` if the parameter is [`UnknownExt`](DispositionParam::UnknownExt) and the
/// `name` matches.
#[inline]
pub fn is_unknown_ext<T: AsRef<str>>(&self, name: T) -> bool {
self.as_unknown_ext(name).is_some()
}
/// Returns the name if applicable.
#[inline]
pub fn as_name(&self) -> Option<&str> {
match self {
DispositionParam::Name(ref name) => Some(name.as_str()),
_ => None,
}
}
/// Returns the filename if applicable.
#[inline]
pub fn as_filename(&self) -> Option<&str> {
match self {
DispositionParam::Filename(ref filename) => Some(filename.as_str()),
_ => None,
}
}
/// Returns the filename* if applicable.
#[inline]
pub fn as_filename_ext(&self) -> Option<&ExtendedValue> {
match self {
DispositionParam::FilenameExt(ref value) => Some(value),
_ => None,
}
}
/// Returns the value of the unrecognized regular parameter if it is
/// [`Unknown`](DispositionParam::Unknown) and the `name` matches.
#[inline]
pub fn as_unknown<T: AsRef<str>>(&self, name: T) -> Option<&str> {
match self {
DispositionParam::Unknown(ref ext_name, ref value)
if ext_name.eq_ignore_ascii_case(name.as_ref()) =>
{
Some(value.as_str())
}
_ => None,
}
}
/// Returns the value of the unrecognized extended parameter if it is
/// [`Unknown`](DispositionParam::Unknown) and the `name` matches.
#[inline]
pub fn as_unknown_ext<T: AsRef<str>>(&self, name: T) -> Option<&ExtendedValue> {
match self {
DispositionParam::UnknownExt(ref ext_name, ref value)
if ext_name.eq_ignore_ascii_case(name.as_ref()) =>
{
Some(value)
}
_ => None,
}
}
}
/// A *Content-Disposition* header. It is compatible to be used either as
/// [a response header for the main body](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition#as_a_response_header_for_the_main_body)
/// as (re)defined in [RFC 6266](https://datatracker.ietf.org/doc/html/rfc6266), or as
/// [a header for a multipart body](https://mdn.io/Content-Disposition#As_a_header_for_a_multipart_body)
/// as (re)defined in [RFC 7587](https://datatracker.ietf.org/doc/html/rfc7578).
///
/// In a regular HTTP response, the *Content-Disposition* response header is a header indicating if
/// the content is expected to be displayed *inline* in the browser, that is, as a Web page or as
/// part of a Web page, or as an attachment, that is downloaded and saved locally, and also can be
/// used to attach additional metadata, such as the filename to use when saving the response payload
/// locally.
///
/// In a *multipart/form-data* body, the HTTP *Content-Disposition* general header is a header that
/// can be used on the subpart of a multipart body to give information about the field it applies to.
/// The subpart is delimited by the boundary defined in the *Content-Type* header. Used on the body
/// itself, *Content-Disposition* has no effect.
///
/// # ABNF
/// ```plain
/// content-disposition = "Content-Disposition" ":"
/// disposition-type *( ";" disposition-parm )
///
/// disposition-type = "inline" | "attachment" | disp-ext-type
/// ; case-insensitive
///
/// disp-ext-type = token
///
/// disposition-parm = filename-parm | disp-ext-parm
///
/// filename-parm = "filename" "=" value
/// | "filename*" "=" ext-value
///
/// disp-ext-parm = token "=" value
/// | ext-token "=" ext-value
///
/// ext-token = <the characters in token, followed by "*">
/// ```
///
/// # Note
/// *filename* is [not supposed](https://datatracker.ietf.org/doc/html/rfc6266#appendix-D) to
/// contain any non-ASCII characters when used in a *Content-Disposition* HTTP response header,
/// where filename* with charset UTF-8 may be used instead in case there are Unicode characters in
/// file names. Filename is [acceptable](https://datatracker.ietf.org/doc/html/rfc7578#section-4.2)
/// to be UTF-8 encoded directly in a *Content-Disposition* header for
/// *multipart/form-data*, though.
///
/// *filename* [must not](https://datatracker.ietf.org/doc/html/rfc7578#section-4.2) be used within
/// *multipart/form-data*.
///
/// # Examples
/// ```
/// use actix_web::http::header::{
/// Charset, ContentDisposition, DispositionParam, DispositionType,
/// ExtendedValue,
/// };
///
/// let cd1 = ContentDisposition {
/// disposition: DispositionType::Attachment,
/// parameters: vec![DispositionParam::FilenameExt(ExtendedValue {
/// charset: Charset::Iso_8859_1, // The character set for the bytes of the filename
/// language_tag: None, // The optional language tag (see `language-tag` crate)
/// value: b"\xa9 Copyright 1989.txt".to_vec(), // the actual bytes of the filename
/// })],
/// };
/// assert!(cd1.is_attachment());
/// assert!(cd1.get_filename_ext().is_some());
///
/// let cd2 = ContentDisposition {
/// disposition: DispositionType::FormData,
/// parameters: vec![
/// DispositionParam::Name(String::from("file")),
/// DispositionParam::Filename(String::from("bill.odt")),
/// ],
/// };
/// assert_eq!(cd2.get_name(), Some("file")); // field name
/// assert_eq!(cd2.get_filename(), Some("bill.odt"));
///
/// // HTTP response header with Unicode characters in file names
/// let cd3 = ContentDisposition {
/// disposition: DispositionType::Attachment,
/// parameters: vec![
/// DispositionParam::FilenameExt(ExtendedValue {
/// charset: Charset::Ext(String::from("UTF-8")),
/// language_tag: None,
/// value: String::from("\u{1f600}.svg").into_bytes(),
/// }),
/// // fallback for better compatibility
/// DispositionParam::Filename(String::from("Grinning-Face-Emoji.svg"))
/// ],
/// };
/// assert_eq!(cd3.get_filename_ext().map(|ev| ev.value.as_ref()),
/// Some("\u{1f600}.svg".as_bytes()));
/// ```
///
/// # Security Note
/// If "filename" parameter is supplied, do not use the file name blindly, check and possibly
/// change to match local file system conventions if applicable, and do not use directory path
/// information that may be present.
/// See [RFC 2183 §2.3](https://datatracker.ietf.org/doc/html/rfc2183#section-2.3).
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ContentDisposition {
/// The disposition type
pub disposition: DispositionType,
/// Disposition parameters
pub parameters: Vec<DispositionParam>,
}
impl ContentDisposition {
/// Constructs a Content-Disposition header suitable for downloads.
///
/// # Examples
/// ```
/// use actix_web::http::header::{ContentDisposition, TryIntoHeaderValue as _};
///
/// let cd = ContentDisposition::attachment("files.zip");
///
/// let cd_val = cd.try_into_value().unwrap();
/// assert_eq!(cd_val, "attachment; filename=\"files.zip\"");
/// ```
pub fn attachment(filename: impl Into<String>) -> Self {
Self {
disposition: DispositionType::Attachment,
parameters: vec![DispositionParam::Filename(filename.into())],
}
}
/// Parse a raw Content-Disposition header value.
pub fn from_raw(hv: &header::HeaderValue) -> Result<Self, crate::error::ParseError> {
// `header::from_one_raw_str` invokes `hv.to_str` which assumes `hv` contains only visible
// ASCII characters. So `hv.as_bytes` is necessary here.
let hv = String::from_utf8(hv.as_bytes().to_vec())
.map_err(|_| crate::error::ParseError::Header)?;
let (disp_type, mut left) = split_once_and_trim(hv.as_str().trim(), ';');
if disp_type.is_empty() {
return Err(crate::error::ParseError::Header);
}
let mut cd = ContentDisposition {
disposition: disp_type.into(),
parameters: Vec::new(),
};
while !left.is_empty() {
let (param_name, new_left) = split_once_and_trim(left, '=');
if param_name.is_empty() || param_name == "*" || new_left.is_empty() {
return Err(crate::error::ParseError::Header);
}
left = new_left;
if let Some(param_name) = param_name.strip_suffix('*') {
// extended parameters
let (ext_value, new_left) = split_once_and_trim(left, ';');
left = new_left;
let ext_value = header::parse_extended_value(ext_value)?;
let param = if param_name.eq_ignore_ascii_case("filename") {
DispositionParam::FilenameExt(ext_value)
} else {
DispositionParam::UnknownExt(param_name.to_owned(), ext_value)
};
cd.parameters.push(param);
} else {
// regular parameters
let value = if left.starts_with('\"') {
// quoted-string: defined in RFC 6266 -> RFC 2616 Section 3.6
let mut escaping = false;
let mut quoted_string = vec![];
let mut end = None;
// search for closing quote
for (i, &c) in left.as_bytes().iter().skip(1).enumerate() {
if escaping {
escaping = false;
quoted_string.push(c);
} else if c == 0x5c {
// backslash
escaping = true;
} else if c == 0x22 {
// double quote
end = Some(i + 1); // cuz skipped 1 for the leading quote
break;
} else {
quoted_string.push(c);
}
}
left = &left[end.ok_or(crate::error::ParseError::Header)? + 1..];
left = split_once(left, ';').1.trim_start();
// In fact, it should not be Err if the above code is correct.
String::from_utf8(quoted_string)
.map_err(|_| crate::error::ParseError::Header)?
} else {
// token: won't contains semicolon according to RFC 2616 Section 2.2
let (token, new_left) = split_once_and_trim(left, ';');
left = new_left;
if token.is_empty() {
// quoted-string can be empty, but token cannot be empty
return Err(crate::error::ParseError::Header);
}
token.to_owned()
};
let param = if param_name.eq_ignore_ascii_case("name") {
DispositionParam::Name(value)
} else if param_name.eq_ignore_ascii_case("filename") {
// See also comments in test_from_raw_unnecessary_percent_decode.
DispositionParam::Filename(value)
} else {
DispositionParam::Unknown(param_name.to_owned(), value)
};
cd.parameters.push(param);
}
}
Ok(cd)
}
/// Returns `true` if type is [`Inline`](DispositionType::Inline).
pub fn is_inline(&self) -> bool {
matches!(self.disposition, DispositionType::Inline)
}
/// Returns `true` if type is [`Attachment`](DispositionType::Attachment).
pub fn is_attachment(&self) -> bool {
matches!(self.disposition, DispositionType::Attachment)
}
/// Returns `true` if type is [`FormData`](DispositionType::FormData).
pub fn is_form_data(&self) -> bool {
matches!(self.disposition, DispositionType::FormData)
}
/// Returns `true` if type is [`Ext`](DispositionType::Ext) and the `disp_type` matches.
pub fn is_ext(&self, disp_type: impl AsRef<str>) -> bool {
matches!(
self.disposition,
DispositionType::Ext(ref t) if t.eq_ignore_ascii_case(disp_type.as_ref())
)
}
/// Return the value of *name* if exists.
pub fn get_name(&self) -> Option<&str> {
self.parameters.iter().find_map(DispositionParam::as_name)
}
/// Return the value of *filename* if exists.
pub fn get_filename(&self) -> Option<&str> {
self.parameters
.iter()
.find_map(DispositionParam::as_filename)
}
/// Return the value of *filename\** if exists.
pub fn get_filename_ext(&self) -> Option<&ExtendedValue> {
self.parameters
.iter()
.find_map(DispositionParam::as_filename_ext)
}
/// Return the value of the parameter which the `name` matches.
pub fn get_unknown(&self, name: impl AsRef<str>) -> Option<&str> {
let name = name.as_ref();
self.parameters.iter().find_map(|p| p.as_unknown(name))
}
/// Return the value of the extended parameter which the `name` matches.
pub fn get_unknown_ext(&self, name: impl AsRef<str>) -> Option<&ExtendedValue> {
let name = name.as_ref();
self.parameters.iter().find_map(|p| p.as_unknown_ext(name))
}
}
impl TryIntoHeaderValue for ContentDisposition {
type Error = header::InvalidHeaderValue;
fn try_into_value(self) -> Result<header::HeaderValue, Self::Error> {
let mut writer = Writer::new();
let _ = write!(&mut writer, "{}", self);
header::HeaderValue::from_maybe_shared(writer.take())
}
}
impl Header for ContentDisposition {
fn name() -> header::HeaderName {
header::CONTENT_DISPOSITION
}
fn parse<T: crate::HttpMessage>(msg: &T) -> Result<Self, crate::error::ParseError> {
if let Some(h) = msg.headers().get(&Self::name()) {
Self::from_raw(h)
} else {
Err(crate::error::ParseError::Header)
}
}
}
impl fmt::Display for DispositionType {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
DispositionType::Inline => write!(f, "inline"),
DispositionType::Attachment => write!(f, "attachment"),
DispositionType::FormData => write!(f, "form-data"),
DispositionType::Ext(ref s) => write!(f, "{}", s),
}
}
}
impl fmt::Display for DispositionParam {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
// All ASCII control characters (0-30, 127) including horizontal tab, double quote, and
// backslash should be escaped in quoted-string (i.e. "foobar").
//
// Ref: RFC 6266 §4.1 -> RFC 2616 §3.6
//
// filename-parm = "filename" "=" value
// value = token | quoted-string
// quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
// qdtext = <any TEXT except <">>
// quoted-pair = "\" CHAR
// TEXT = <any OCTET except CTLs,
// but including LWS>
// LWS = [CRLF] 1*( SP | HT )
// OCTET = <any 8-bit sequence of data>
// CHAR = <any US-ASCII character (octets 0 - 127)>
// CTL = <any US-ASCII control character
// (octets 0 - 31) and DEL (127)>
//
// Ref: RFC 7578 S4.2 -> RFC 2183 S2 -> RFC 2045 S5.1
// parameter := attribute "=" value
// attribute := token
// ; Matching of attributes
// ; is ALWAYS case-insensitive.
// value := token / quoted-string
// token := 1*<any (US-ASCII) CHAR except SPACE, CTLs,
// or tspecials>
// tspecials := "(" / ")" / "<" / ">" / "@" /
// "," / ";" / ":" / "\" / <">
// "/" / "[" / "]" / "?" / "="
// ; Must be in quoted-string,
// ; to use within parameter values
//
//
// See also comments in test_from_raw_unnecessary_percent_decode.
static RE: Lazy<Regex> =
Lazy::new(|| Regex::new("[\x00-\x08\x10-\x1F\x7F\"\\\\]").unwrap());
match self {
DispositionParam::Name(ref value) => write!(f, "name={}", value),
DispositionParam::Filename(ref value) => {
write!(f, "filename=\"{}\"", RE.replace_all(value, "\\$0").as_ref())
}
DispositionParam::Unknown(ref name, ref value) => write!(
f,
"{}=\"{}\"",
name,
&RE.replace_all(value, "\\$0").as_ref()
),
DispositionParam::FilenameExt(ref ext_value) => {
write!(f, "filename*={}", ext_value)
}
DispositionParam::UnknownExt(ref name, ref ext_value) => {
write!(f, "{}*={}", name, ext_value)
}
}
}
}
impl fmt::Display for ContentDisposition {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.disposition)?;
self.parameters
.iter()
.try_for_each(|param| write!(f, "; {}", param))
}
}
#[cfg(test)]
mod tests {
use super::{ContentDisposition, DispositionParam, DispositionType};
use crate::http::header::{Charset, ExtendedValue, HeaderValue};
#[test]
fn test_from_raw_basic() {
assert!(ContentDisposition::from_raw(&HeaderValue::from_static("")).is_err());
let a = HeaderValue::from_static(
"form-data; dummy=3; name=upload; filename=\"sample.png\"",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Unknown("dummy".to_owned(), "3".to_owned()),
DispositionParam::Name("upload".to_owned()),
DispositionParam::Filename("sample.png".to_owned()),
],
};
assert_eq!(a, b);
let a = HeaderValue::from_static("attachment; filename=\"image.jpg\"");
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![DispositionParam::Filename("image.jpg".to_owned())],
};
assert_eq!(a, b);
let a = HeaderValue::from_static("inline; filename=image.jpg");
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Inline,
parameters: vec![DispositionParam::Filename("image.jpg".to_owned())],
};
assert_eq!(a, b);
let a = HeaderValue::from_static(
"attachment; creation-date=\"Wed, 12 Feb 1997 16:29:51 -0500\"",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![DispositionParam::Unknown(
String::from("creation-date"),
"Wed, 12 Feb 1997 16:29:51 -0500".to_owned(),
)],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_extended() {
let a = HeaderValue::from_static(
"attachment; filename*=UTF-8''%c2%a3%20and%20%e2%82%ac%20rates",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![DispositionParam::FilenameExt(ExtendedValue {
charset: Charset::Ext(String::from("UTF-8")),
language_tag: None,
value: vec![
0xc2, 0xa3, 0x20, b'a', b'n', b'd', 0x20, 0xe2, 0x82, 0xac, 0x20, b'r',
b'a', b't', b'e', b's',
],
})],
};
assert_eq!(a, b);
let a = HeaderValue::from_static(
"attachment; filename*=UTF-8''%c2%a3%20and%20%e2%82%ac%20rates",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![DispositionParam::FilenameExt(ExtendedValue {
charset: Charset::Ext(String::from("UTF-8")),
language_tag: None,
value: vec![
0xc2, 0xa3, 0x20, b'a', b'n', b'd', 0x20, 0xe2, 0x82, 0xac, 0x20, b'r',
b'a', b't', b'e', b's',
],
})],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_extra_whitespace() {
let a = HeaderValue::from_static(
"form-data ; du-mmy= 3 ; name =upload ; filename = \"sample.png\" ; ",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Unknown("du-mmy".to_owned(), "3".to_owned()),
DispositionParam::Name("upload".to_owned()),
DispositionParam::Filename("sample.png".to_owned()),
],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_unordered() {
let a = HeaderValue::from_static(
"form-data; dummy=3; filename=\"sample.png\" ; name=upload;",
// Actually, a trailing semicolon is not compliant. But it is fine to accept.
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Unknown("dummy".to_owned(), "3".to_owned()),
DispositionParam::Filename("sample.png".to_owned()),
DispositionParam::Name("upload".to_owned()),
],
};
assert_eq!(a, b);
let a = HeaderValue::from_str(
"attachment; filename*=iso-8859-1''foo-%E4.html; filename=\"foo-ä.html\"",
)
.unwrap();
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![
DispositionParam::FilenameExt(ExtendedValue {
charset: Charset::Iso_8859_1,
language_tag: None,
value: b"foo-\xe4.html".to_vec(),
}),
DispositionParam::Filename("foo-ä.html".to_owned()),
],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_only_disp() {
let a = ContentDisposition::from_raw(&HeaderValue::from_static("attachment")).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![],
};
assert_eq!(a, b);
let a = ContentDisposition::from_raw(&HeaderValue::from_static("inline ;")).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Inline,
parameters: vec![],
};
assert_eq!(a, b);
let a = ContentDisposition::from_raw(&HeaderValue::from_static("unknown-disp-param"))
.unwrap();
let b = ContentDisposition {
disposition: DispositionType::Ext(String::from("unknown-disp-param")),
parameters: vec![],
};
assert_eq!(a, b);
}
#[test]
fn from_raw_with_mixed_case() {
let a = HeaderValue::from_str(
"InLInE; fIlenAME*=iso-8859-1''foo-%E4.html; filEName=\"foo-ä.html\"",
)
.unwrap();
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::Inline,
parameters: vec![
DispositionParam::FilenameExt(ExtendedValue {
charset: Charset::Iso_8859_1,
language_tag: None,
value: b"foo-\xe4.html".to_vec(),
}),
DispositionParam::Filename("foo-ä.html".to_owned()),
],
};
assert_eq!(a, b);
}
#[test]
fn from_raw_with_unicode() {
/* RFC 7578 Section 4.2:
Some commonly deployed systems use multipart/form-data with file names directly encoded
including octets outside the US-ASCII range. The encoding used for the file names is
typically UTF-8, although HTML forms will use the charset associated with the form.
Mainstream browsers like Firefox (gecko) and Chrome use UTF-8 directly as above.
(And now, only UTF-8 is handled by this implementation.)
*/
let a =
HeaderValue::from_str("form-data; name=upload; filename=\"文件.webp\"").unwrap();
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Name(String::from("upload")),
DispositionParam::Filename(String::from("文件.webp")),
],
};
assert_eq!(a, b);
let a = HeaderValue::from_str(
"form-data; name=upload; filename=\"余固知謇謇之為患兮,忍而不能舍也.pptx\"",
)
.unwrap();
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Name(String::from("upload")),
DispositionParam::Filename(String::from(
"余固知謇謇之為患兮,忍而不能舍也.pptx",
)),
],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_escape() {
let a = HeaderValue::from_static(
"form-data; dummy=3; name=upload; filename=\"s\\amp\\\"le.png\"",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Unknown("dummy".to_owned(), "3".to_owned()),
DispositionParam::Name("upload".to_owned()),
DispositionParam::Filename(
['s', 'a', 'm', 'p', '\"', 'l', 'e', '.', 'p', 'n', 'g']
.iter()
.collect(),
),
],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_semicolon() {
let a = HeaderValue::from_static("form-data; filename=\"A semicolon here;.pdf\"");
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![DispositionParam::Filename(String::from(
"A semicolon here;.pdf",
))],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_unnecessary_percent_decode() {
// In fact, RFC 7578 (multipart/form-data) Section 2 and 4.2 suggests that filename with
// non-ASCII characters MAY be percent-encoded.
// On the contrary, RFC 6266 or other RFCs related to Content-Disposition response header
// do not mention such percent-encoding.
// So, it appears to be undecidable whether to percent-decode or not without
// knowing the usage scenario (multipart/form-data v.s. HTTP response header) and
// inevitable to unnecessarily percent-decode filename with %XX in the former scenario.
// Fortunately, it seems that almost all mainstream browsers just send UTF-8 encoded file
// names in quoted-string format (tested on Edge, IE11, Chrome and Firefox) without
// percent-encoding. So we do not bother to attempt to percent-decode.
let a = HeaderValue::from_static(
"form-data; name=photo; filename=\"%74%65%73%74%2e%70%6e%67\"",
);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Name("photo".to_owned()),
DispositionParam::Filename(String::from("%74%65%73%74%2e%70%6e%67")),
],
};
assert_eq!(a, b);
let a =
HeaderValue::from_static("form-data; name=photo; filename=\"%74%65%73%74.png\"");
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let b = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Name("photo".to_owned()),
DispositionParam::Filename(String::from("%74%65%73%74.png")),
],
};
assert_eq!(a, b);
}
#[test]
fn test_from_raw_param_value_missing() {
let a = HeaderValue::from_static("form-data; name=upload ; filename=");
assert!(ContentDisposition::from_raw(&a).is_err());
let a = HeaderValue::from_static("attachment; dummy=; filename=invoice.pdf");
assert!(ContentDisposition::from_raw(&a).is_err());
let a = HeaderValue::from_static("inline; filename= ");
assert!(ContentDisposition::from_raw(&a).is_err());
let a = HeaderValue::from_static("inline; filename=\"\"");
assert!(ContentDisposition::from_raw(&a)
.expect("parse cd")
.get_filename()
.expect("filename")
.is_empty());
}
#[test]
fn test_from_raw_param_name_missing() {
let a = HeaderValue::from_static("inline; =\"test.txt\"");
assert!(ContentDisposition::from_raw(&a).is_err());
let a = HeaderValue::from_static("inline; =diary.odt");
assert!(ContentDisposition::from_raw(&a).is_err());
let a = HeaderValue::from_static("inline; =");
assert!(ContentDisposition::from_raw(&a).is_err());
}
#[test]
fn test_display_extended() {
let as_string = "attachment; filename*=UTF-8'en'%C2%A3%20and%20%E2%82%AC%20rates";
let a = HeaderValue::from_static(as_string);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let display_rendered = format!("{}", a);
assert_eq!(as_string, display_rendered);
let a = HeaderValue::from_static("attachment; filename=colourful.csv");
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let display_rendered = format!("{}", a);
assert_eq!(
"attachment; filename=\"colourful.csv\"".to_owned(),
display_rendered
);
}
#[test]
fn test_display_quote() {
let as_string = "form-data; name=upload; filename=\"Quote\\\"here.png\"";
as_string
.find(['\\', '\"'].iter().collect::<String>().as_str())
.unwrap(); // ensure `\"` is there
let a = HeaderValue::from_static(as_string);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let display_rendered = format!("{}", a);
assert_eq!(as_string, display_rendered);
}
#[test]
fn test_display_space_tab() {
let as_string = "form-data; name=upload; filename=\"Space here.png\"";
let a = HeaderValue::from_static(as_string);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let display_rendered = format!("{}", a);
assert_eq!(as_string, display_rendered);
let a: ContentDisposition = ContentDisposition {
disposition: DispositionType::Inline,
parameters: vec![DispositionParam::Filename(String::from("Tab\there.png"))],
};
let display_rendered = format!("{}", a);
assert_eq!("inline; filename=\"Tab\x09here.png\"", display_rendered);
}
#[test]
fn test_display_control_characters() {
/* let a = "attachment; filename=\"carriage\rreturn.png\"";
let a = HeaderValue::from_static(a);
let a: ContentDisposition = ContentDisposition::from_raw(&a).unwrap();
let display_rendered = format!("{}", a);
assert_eq!(
"attachment; filename=\"carriage\\\rreturn.png\"",
display_rendered
);*/
// No way to create a HeaderValue containing a carriage return.
let a: ContentDisposition = ContentDisposition {
disposition: DispositionType::Inline,
parameters: vec![DispositionParam::Filename(String::from("bell\x07.png"))],
};
let display_rendered = format!("{}", a);
assert_eq!("inline; filename=\"bell\\\x07.png\"", display_rendered);
}
#[test]
fn test_param_methods() {
let param = DispositionParam::Filename(String::from("sample.txt"));
assert!(param.is_filename());
assert_eq!(param.as_filename().unwrap(), "sample.txt");
let param = DispositionParam::Unknown(String::from("foo"), String::from("bar"));
assert!(param.is_unknown("foo"));
assert_eq!(param.as_unknown("fOo"), Some("bar"));
}
#[test]
fn test_disposition_methods() {
let cd = ContentDisposition {
disposition: DispositionType::FormData,
parameters: vec![
DispositionParam::Unknown("dummy".to_owned(), "3".to_owned()),
DispositionParam::Name("upload".to_owned()),
DispositionParam::Filename("sample.png".to_owned()),
],
};
assert_eq!(cd.get_name(), Some("upload"));
assert_eq!(cd.get_unknown("dummy"), Some("3"));
assert_eq!(cd.get_filename(), Some("sample.png"));
assert_eq!(cd.get_unknown_ext("dummy"), None);
assert_eq!(cd.get_unknown("duMMy"), Some("3"));
}
}