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fs: refactor Content-Type and Content-Disposition handling

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axon-q 2018-06-09 13:48:36 +00:00
parent 1fdf6d13be
commit 8681a346c6
1 changed files with 132 additions and 42 deletions
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174
src/fs.rs
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@ -37,12 +37,13 @@ pub fn file_extension_to_mime(ext: &str) -> mime::Mime {
get_mime_type(ext)
}
/// A file with an associated name; responds with the Content-Type based on the
/// file extension.
/// A file with an associated name.
#[derive(Debug)]
pub struct NamedFile {
path: PathBuf,
file: File,
content_type: mime::Mime,
content_disposition: header::ContentDisposition,
md: Metadata,
modified: Option<SystemTime>,
cpu_pool: Option<CpuPool>,
@ -62,15 +63,48 @@ impl NamedFile {
/// let file = NamedFile::open("foo.txt");
/// ```
pub fn open<P: AsRef<Path>>(path: P) -> io::Result<NamedFile> {
let file = File::open(path.as_ref())?;
let md = file.metadata()?;
use header::{ContentDisposition, DispositionType, DispositionParam};
let path = path.as_ref().to_path_buf();
// Get the name of the file and use it to construct default Content-Type
// and Content-Disposition values
let content_type;
let content_disposition;
{
let filename = match path.file_name() {
Some(name) => name.to_string_lossy(),
None => return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Provided path has no filename")),
};
content_type = guess_mime_type(&path);
let disposition_type = match content_type.type_() {
mime::IMAGE | mime::TEXT | mime::VIDEO => DispositionType::Inline,
_ => DispositionType::Attachment,
};
content_disposition = ContentDisposition {
disposition: disposition_type,
parameters: vec![
DispositionParam::Filename(
header::Charset::Ext("UTF-8".to_owned()),
None,
filename.as_bytes().to_vec(),
)
],
};
}
let file = File::open(&path)?;
let md = file.metadata()?;
let modified = md.modified().ok();
let cpu_pool = None;
let encoding = None;
Ok(NamedFile {
path,
file,
content_type,
content_disposition,
md,
modified,
cpu_pool,
@ -125,6 +159,27 @@ impl NamedFile {
self
}
/// Set the MIME Content-Type for serving this file. By default
/// the Content-Type is inferred from the filename extension.
#[inline]
pub fn set_content_type(mut self, mime_type: mime::Mime) -> Self {
self.content_type = mime_type;
self
}
/// Set the Content-Disposition for serving this file. This allows
/// changing the inline/attachment disposition as well as the filename
/// sent to the peer. By default the disposition is `inline` for text,
/// image, and video content types, and `attachment` otherwise, and
/// the filename is taken from the path provided in the `open` method
/// after converting it to UTF-8 using
/// [to_string_lossy](https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.to_string_lossy).
#[inline]
pub fn set_content_disposition(mut self, cd: header::ContentDisposition) -> Self {
self.content_disposition = cd;
self
}
/// Set content encoding for serving this file
#[inline]
pub fn set_content_encoding(mut self, enc: ContentEncoding) -> Self {
@ -220,23 +275,10 @@ impl Responder for NamedFile {
fn respond_to<S>(self, req: &HttpRequest<S>) -> Result<HttpResponse, io::Error> {
if self.status_code != StatusCode::OK {
let mut resp = HttpResponse::build(self.status_code);
resp.if_some(self.path().extension(), |ext, resp| {
resp.set(header::ContentType(get_mime_type(&ext.to_string_lossy())));
}).if_some(self.path().file_name(), |file_name, resp| {
let mime_type = guess_mime_type(self.path());
let inline_or_attachment = match mime_type.type_() {
mime::IMAGE | mime::TEXT | mime::VIDEO => "inline",
_ => "attachment",
};
resp.header(
"Content-Disposition",
format!(
"{inline_or_attachment}; filename={filename}",
inline_or_attachment = inline_or_attachment,
filename = file_name.to_string_lossy()
),
);
});
resp.set(header::ContentType(self.content_type.clone()));
resp.header("Content-Disposition", format!("{}", &self.content_disposition));
if let Some(current_encoding) = self.encoding {
resp.content_encoding(current_encoding);
}
@ -289,23 +331,10 @@ impl Responder for NamedFile {
resp.content_encoding(current_encoding);
}
resp.if_some(self.path().extension(), |ext, resp| {
resp.set(header::ContentType(get_mime_type(&ext.to_string_lossy())));
}).if_some(self.path().file_name(), |file_name, resp| {
let mime_type = guess_mime_type(self.path());
let inline_or_attachment = match mime_type.type_() {
mime::IMAGE | mime::TEXT | mime::VIDEO => "inline",
_ => "attachment",
};
resp.header(
"Content-Disposition",
format!(
"{inline_or_attachment}; filename={filename}",
inline_or_attachment = inline_or_attachment,
filename = file_name.to_string_lossy()
),
);
})
resp.set(header::ContentType(self.content_type.clone()));
resp.header("Content-Disposition", format!("{}", &self.content_disposition));
resp
.if_some(last_modified, |lm, resp| {
resp.set(header::LastModified(lm));
})
@ -733,7 +762,32 @@ mod tests {
);
assert_eq!(
resp.headers().get(header::CONTENT_DISPOSITION).unwrap(),
"inline; filename=Cargo.toml"
"inline; filename=\"Cargo.toml\""
);
}
#[test]
fn test_named_file_set_content_type() {
let mut file = NamedFile::open("Cargo.toml")
.unwrap()
.set_content_type(mime::TEXT_XML)
.set_cpu_pool(CpuPool::new(1));
{
file.file();
let _f: &File = &file;
}
{
let _f: &mut File = &mut file;
}
let resp = file.respond_to(&HttpRequest::default()).unwrap();
assert_eq!(
resp.headers().get(header::CONTENT_TYPE).unwrap(),
"text/xml"
);
assert_eq!(
resp.headers().get(header::CONTENT_DISPOSITION).unwrap(),
"inline; filename=\"Cargo.toml\""
);
}
@ -757,7 +811,43 @@ mod tests {
);
assert_eq!(
resp.headers().get(header::CONTENT_DISPOSITION).unwrap(),
"inline; filename=test.png"
"inline; filename=\"test.png\""
);
}
#[test]
fn test_named_file_image_attachment() {
use header::{ContentDisposition, DispositionType, DispositionParam};
let cd = ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![
DispositionParam::Filename(
header::Charset::Ext("UTF-8".to_owned()),
None,
"test.png".as_bytes().to_vec(),
)
],
};
let mut file = NamedFile::open("tests/test.png")
.unwrap()
.set_content_disposition(cd)
.set_cpu_pool(CpuPool::new(1));
{
file.file();
let _f: &File = &file;
}
{
let _f: &mut File = &mut file;
}
let resp = file.respond_to(&HttpRequest::default()).unwrap();
assert_eq!(
resp.headers().get(header::CONTENT_TYPE).unwrap(),
"image/png"
);
assert_eq!(
resp.headers().get(header::CONTENT_DISPOSITION).unwrap(),
"attachment; filename=\"test.png\""
);
}
@ -781,7 +871,7 @@ mod tests {
);
assert_eq!(
resp.headers().get(header::CONTENT_DISPOSITION).unwrap(),
"attachment; filename=test.binary"
"attachment; filename=\"test.binary\""
);
}
@ -806,7 +896,7 @@ mod tests {
);
assert_eq!(
resp.headers().get(header::CONTENT_DISPOSITION).unwrap(),
"inline; filename=Cargo.toml"
"inline; filename=\"Cargo.toml\""
);
assert_eq!(resp.status(), StatusCode::NOT_FOUND);
}