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refactor multipart to reduce duplicate code between sync and async

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This commit is contained in:
Sean McArthur
2019-01-07 13:40:04 -08:00
parent 4c21127f15
commit 56eff821fd
3 changed files with 423 additions and 349 deletions
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399
src/async_impl/multipart.rs
View File

@@ -3,35 +3,57 @@ use std::borrow::Cow;
use std::fmt;
use mime_guess::Mime;
use url::percent_encoding::{self, EncodeSet, PATH_SEGMENT_ENCODE_SET};
use uuid::Uuid;
use http::HeaderMap;
use futures::Stream;
use super::Body;
use multipart::{PercentEncoding, PartProp};
/// An async multipart/form-data request.
pub struct Form {
boundary: String,
fields: Vec<(Cow<'static, str>, Part)>,
percent_encoding: PercentEncoding,
inner: FormParts<Part>,
}
/// A field in a multipart form.
pub struct Part {
meta: PartMetadata,
value: Body,
}
pub(crate) struct FormParts<P> {
pub(crate) boundary: String,
pub(crate) computed_headers: Vec<Vec<u8>>,
pub(crate) fields: Vec<(Cow<'static, str>, P)>,
pub(crate) percent_encoding: PercentEncoding,
}
pub(crate) struct PartMetadata {
mime: Option<Mime>,
file_name: Option<Cow<'static, str>>,
pub(crate) headers: HeaderMap,
}
pub(crate) trait PartProps {
fn value_len(&self) -> Option<u64>;
fn metadata(&self) -> &PartMetadata;
}
// ===== impl Form =====
impl Form {
/// Creates a new async Form without any content.
pub fn new() -> Form {
Form {
boundary: format!("{}", Uuid::new_v4().to_simple()),
fields: Vec::new(),
percent_encoding: PercentEncoding::PathSegment,
inner: FormParts::new(),
}
}
/// Get the boundary that this form will use.
#[inline]
pub fn boundary(&self) -> &str {
&self.boundary
self.inner.boundary()
}
/// Add a data field with supplied name and value.
@@ -44,60 +66,62 @@ impl Form {
/// .text("password", "secret");
/// ```
pub fn text<T, U>(self, name: T, value: U) -> Form
where T: Into<Cow<'static, str>>,
where
T: Into<Cow<'static, str>>,
U: Into<Cow<'static, str>>,
{
self.part(name, Part::text(value))
}
/// Adds a customized Part.
pub fn part<T>(mut self, name: T, part: Part) -> Form
where T: Into<Cow<'static, str>>,
pub fn part<T>(self, name: T, part: Part) -> Form
where
T: Into<Cow<'static, str>>,
{
self.fields.push((name.into(), part));
self
self.with_inner(move |inner| inner.part(name, part))
}
/// Configure this `Form` to percent-encode using the `path-segment` rules.
pub fn percent_encode_path_segment(mut self) -> Form {
self.percent_encoding = PercentEncoding::PathSegment;
self
pub fn percent_encode_path_segment(self) -> Form {
self.with_inner(|inner| inner.percent_encode_path_segment())
}
/// Configure this `Form` to percent-encode using the `attr-char` rules.
pub fn percent_encode_attr_chars(mut self) -> Form {
self.percent_encoding = PercentEncoding::AttrChar;
self
pub fn percent_encode_attr_chars(self) -> Form {
self.with_inner(|inner| inner.percent_encode_attr_chars())
}
/// Consume this instance and transform into an instance of hyper::Body for use in a request.
pub(crate) fn stream(mut self) -> hyper::Body {
if self.fields.len() == 0 {
if self.inner.fields.len() == 0 {
return hyper::Body::empty();
}
// create initial part to init reduce chain
let (name, part) = self.fields.remove(0);
let (name, part) = self.inner.fields.remove(0);
let start = self.part_stream(name, part);
let fields = self.take_fields();
let fields = self.inner.take_fields();
// for each field, chain an additional stream
let stream = fields.into_iter().fold(start, |memo, (name, part)| {
let part_stream = self.part_stream(name, part);
hyper::Body::wrap_stream(memo.chain(part_stream))
});
// append special ending boundary
let last = hyper::Body::from(format!("--{}--\r\n", self.boundary));
let last = hyper::Body::from(format!("--{}--\r\n", self.boundary()));
hyper::Body::wrap_stream(stream.chain(last))
}
/// Generate a hyper::Body stream for a single Part instance of a Form request.
pub(crate) fn part_stream<T: Into<Cow<'static, str>>>(&mut self, name: T, part: Part) -> hyper::Body {
pub(crate) fn part_stream<T>(&mut self, name: T, part: Part) -> hyper::Body
where
T: Into<Cow<'static, str>>,
{
// start with boundary
let boundary = hyper::Body::from(format!("--{}\r\n", self.boundary));
let boundary = hyper::Body::from(format!("--{}\r\n", self.boundary()));
// append headers
let header = hyper::Body::from({
let mut h = self.percent_encoding.encode_headers(&name.into(), &part);
let mut h = self.inner.percent_encoding.encode_headers(&name.into(), &part.meta);
h.extend_from_slice(b"\r\n\r\n");
h
});
@@ -105,34 +129,33 @@ impl Form {
hyper::Body::wrap_stream(boundary.chain(header).chain(hyper::Body::wrap_stream(part.value)).chain(hyper::Body::from("\r\n".to_owned())))
}
/// Take the fields vector of this instance, replacing with an empty vector.
fn take_fields(&mut self) -> Vec<(Cow<'static, str>, Part)> {
std::mem::replace(&mut self.fields, Vec::new())
pub(crate) fn compute_length(&mut self) -> Option<u64> {
self.inner.compute_length()
}
fn with_inner<F>(self, func: F) -> Self
where
F: FnOnce(FormParts<Part>) -> FormParts<Part>,
{
Form {
inner: func(self.inner),
}
}
}
impl fmt::Debug for Form {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Form")
.field("boundary", &self.boundary)
.field("parts", &self.fields)
.finish()
self.inner.fmt_fields("Form", f)
}
}
/// A field in a multipart form.
pub struct Part {
value: Body,
mime: Option<Mime>,
file_name: Option<Cow<'static, str>>,
headers: HeaderMap,
}
// ===== impl Part =====
impl Part {
/// Makes a text parameter.
pub fn text<T>(value: T) -> Part
where T: Into<Cow<'static, str>>,
where
T: Into<Cow<'static, str>>,
{
let body = match value.into() {
Cow::Borrowed(slice) => Body::from(slice),
@@ -141,9 +164,10 @@ impl Part {
Part::new(body)
}
/// Makes a new parameter from arbitrary bytes
/// Makes a new parameter from arbitrary bytes.
pub fn bytes<T>(value: T) -> Part
where T: Into<Cow<'static, [u8]>>
where
T: Into<Cow<'static, [u8]>>,
{
let body = match value.into() {
Cow::Borrowed(slice) => Body::from(slice),
@@ -153,80 +177,263 @@ impl Part {
}
/// Makes a new parameter from an arbitrary stream.
pub fn stream<T: Stream + Send + 'static>(value: T) -> Part
where hyper::Chunk: std::convert::From<<T as futures::Stream>::Item>,
<T as futures::Stream>::Error: std::error::Error + Send + Sync {
pub fn stream<T>(value: T) -> Part
where
T: Stream + Send + 'static,
T::Error: std::error::Error + Send + Sync,
hyper::Chunk: std::convert::From<T::Item>,
{
Part::new(Body::wrap(hyper::Body::wrap_stream(value)))
}
fn new(value: Body) -> Part {
Part {
value: value,
meta: PartMetadata::new(),
value,
}
}
/// Tries to set the mime of this part.
pub fn mime_str(self, mime: &str) -> ::Result<Part> {
Ok(self.mime(try_!(mime.parse())))
}
// Re-export when mime 0.4 is available, with split MediaType/MediaRange.
fn mime(self, mime: Mime) -> Part {
self.with_inner(move |inner| inner.mime(mime))
}
/// Sets the filename, builder style.
pub fn file_name<T>(self, filename: T) -> Part
where
T: Into<Cow<'static, str>>,
{
self.with_inner(move |inner| inner.file_name(filename))
}
fn with_inner<F>(self, func: F) -> Self
where
F: FnOnce(PartMetadata) -> PartMetadata,
{
Part {
meta: func(self.meta),
value: self.value,
}
}
}
impl fmt::Debug for Part {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut dbg = f.debug_struct("Part");
dbg.field("value", &self.value);
self.meta.fmt_fields(&mut dbg);
dbg.finish()
}
}
impl PartProps for Part {
fn value_len(&self) -> Option<u64> {
self.value.content_length()
}
fn metadata(&self) -> &PartMetadata {
&self.meta
}
}
// ===== impl FormParts =====
impl<P: PartProps> FormParts<P> {
pub(crate) fn new() -> Self {
FormParts {
boundary: format!("{}", Uuid::new_v4().to_simple()),
computed_headers: Vec::new(),
fields: Vec::new(),
percent_encoding: PercentEncoding::PathSegment,
}
}
pub(crate) fn boundary(&self) -> &str {
&self.boundary
}
/// Adds a customized Part.
pub(crate) fn part<T>(mut self, name: T, part: P) -> Self
where
T: Into<Cow<'static, str>>,
{
self.fields.push((name.into(), part));
self
}
/// Configure this `Form` to percent-encode using the `path-segment` rules.
pub(crate) fn percent_encode_path_segment(mut self) -> Self {
self.percent_encoding = PercentEncoding::PathSegment;
self
}
/// Configure this `Form` to percent-encode using the `attr-char` rules.
pub(crate) fn percent_encode_attr_chars(mut self) -> Self {
self.percent_encoding = PercentEncoding::AttrChar;
self
}
// If predictable, computes the length the request will have
// The length should be preditable if only String and file fields have been added,
// but not if a generic reader has been added;
pub(crate) fn compute_length(&mut self) -> Option<u64> {
let mut length = 0u64;
for &(ref name, ref field) in self.fields.iter() {
match field.value_len() {
Some(value_length) => {
// We are constructing the header just to get its length. To not have to
// construct it again when the request is sent we cache these headers.
let header = self.percent_encoding.encode_headers(name, field.metadata());
let header_length = header.len();
self.computed_headers.push(header);
// The additions mimick the format string out of which the field is constructed
// in Reader. Not the cleanest solution because if that format string is
// ever changed then this formula needs to be changed too which is not an
// obvious dependency in the code.
length += 2 + self.boundary().len() as u64 + 2 + header_length as u64 + 4 + value_length + 2
}
_ => return None,
}
}
// If there is a at least one field there is a special boundary for the very last field.
if !self.fields.is_empty() {
length += 2 + self.boundary().len() as u64 + 4
}
Some(length)
}
/// Take the fields vector of this instance, replacing with an empty vector.
fn take_fields(&mut self) -> Vec<(Cow<'static, str>, P)> {
std::mem::replace(&mut self.fields, Vec::new())
}
}
impl<P: fmt::Debug> FormParts<P> {
pub(crate) fn fmt_fields(&self, ty_name: &'static str, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct(ty_name)
.field("boundary", &self.boundary)
.field("parts", &self.fields)
.finish()
}
}
// ===== impl PartMetadata =====
impl PartMetadata {
pub(crate) fn new() -> Self {
PartMetadata {
mime: None,
file_name: None,
headers: HeaderMap::default()
}
}
/// Tries to set the mime of this part.
pub fn mime_str(mut self, mime: &str) -> ::Result<Part> {
self.mime = Some(try_!(mime.parse()));
Ok(self)
}
// Re-enable when mime 0.4 is available, with split MediaType/MediaRange.
#[cfg(test)]
fn mime(mut self, mime: Mime) -> Part {
pub(crate) fn mime(mut self, mime: Mime) -> Self {
self.mime = Some(mime);
self
}
/// Sets the filename, builder style.
pub fn file_name<T: Into<Cow<'static, str>>>(mut self, filename: T) -> Part {
pub(crate) fn file_name<T>(mut self, filename: T) -> Self
where
T: Into<Cow<'static, str>>,
{
self.file_name = Some(filename.into());
self
}
}
impl PartProp for Part {
fn mime(&self) -> &Option<Mime> {
&self.mime
}
fn mime_mut(&mut self) -> &mut Option<Mime> {
&mut self.mime
}
fn file_name(&self) -> &Option<Cow<'static, str>> {
&self.file_name
}
fn file_name_mut(&mut self) -> &mut Option<Cow<'static, str>> {
&mut self.file_name
}
fn headers(&self) -> &HeaderMap {
&self.headers
}
fn headers_mut(&mut self) -> &mut HeaderMap {
&mut self.headers
}
}
impl fmt::Debug for Part {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Part")
.field("value", &self.value)
impl PartMetadata {
pub(crate) fn fmt_fields<'f, 'fa, 'fb>(
&self,
debug_struct: &'f mut fmt::DebugStruct<'fa, 'fb>
) -> &'f mut fmt::DebugStruct<'fa, 'fb> {
debug_struct
.field("mime", &self.mime)
.field("file_name", &self.file_name)
.field("headers", &self.headers)
.finish()
}
}
#[derive(Debug, Clone)]
pub(crate) struct AttrCharEncodeSet;
impl EncodeSet for AttrCharEncodeSet {
fn contains(&self, ch: u8) -> bool {
match ch as char {
'!' => false,
'#' => false,
'$' => false,
'&' => false,
'+' => false,
'-' => false,
'.' => false,
'^' => false,
'_' => false,
'`' => false,
'|' => false,
'~' => false,
_ => {
let is_alpha_numeric = ch >= 0x41 && ch <= 0x5a || ch >= 0x61 && ch <= 0x7a || ch >= 0x30 && ch <= 0x39;
!is_alpha_numeric
}
}
}
}
pub(crate) enum PercentEncoding {
PathSegment,
AttrChar,
}
impl PercentEncoding {
pub(crate) fn encode_headers(&self, name: &str, field: &PartMetadata) -> Vec<u8> {
let s = format!(
"Content-Disposition: form-data; {}{}{}",
self.format_parameter("name", name),
match field.file_name {
Some(ref file_name) => format!("; {}", self.format_parameter("filename", file_name)),
None => String::new(),
},
match field.mime {
Some(ref mime) => format!("\r\nContent-Type: {}", mime),
None => "".to_string(),
},
);
field.headers.iter().fold(s.into_bytes(), |mut header, (k,v)| {
header.extend_from_slice(b"\r\n");
header.extend_from_slice(k.as_str().as_bytes());
header.extend_from_slice(b": ");
header.extend_from_slice(v.as_bytes());
header
})
}
fn format_parameter(&self, name: &str, value: &str) -> String {
let legal_value = match *self {
PercentEncoding::PathSegment => {
percent_encoding::utf8_percent_encode(value, PATH_SEGMENT_ENCODE_SET)
.to_string()
},
PercentEncoding::AttrChar => {
percent_encoding::utf8_percent_encode(value, AttrCharEncodeSet)
.to_string()
},
};
if value.len() == legal_value.len() {
// nothing has been percent encoded
format!("{}=\"{}\"", name, value)
} else {
// something has been percent encoded
format!("{}*=utf-8''{}", name, legal_value)
}
}
}
#[cfg(test)]
mod tests {
@@ -258,7 +465,7 @@ mod tests {
"key3",
Part::text("value3").file_name("filename"),
);
form.boundary = "boundary".to_string();
form.inner.boundary = "boundary".to_string();
let expected = "--boundary\r\n\
Content-Disposition: form-data; name=\"reader1\"\r\n\r\n\
part1\r\n\
@@ -291,9 +498,9 @@ mod tests {
#[test]
fn stream_to_end_with_header() {
let mut part = Part::text("value2").mime(::mime::IMAGE_BMP);
part.headers_mut().insert("Hdr3", "/a/b/c".parse().unwrap());
part.meta.headers.insert("Hdr3", "/a/b/c".parse().unwrap());
let mut form = Form::new().part("key2", part);
form.boundary = "boundary".to_string();
form.inner.boundary = "boundary".to_string();
let expected = "--boundary\r\n\
Content-Disposition: form-data; name=\"key2\"\r\n\
Content-Type: image/bmp\r\n\
@@ -320,12 +527,12 @@ mod tests {
let field = Part::text("");
assert_eq!(
PercentEncoding::PathSegment.encode_headers(name, &field),
PercentEncoding::PathSegment.encode_headers(name, &field.meta),
&b"Content-Disposition: form-data; name*=utf-8''start%25'%22%0D%0A%C3%9Fend"[..]
);
assert_eq!(
PercentEncoding::AttrChar.encode_headers(name, &field),
PercentEncoding::AttrChar.encode_headers(name, &field.meta),
&b"Content-Disposition: form-data; name*=utf-8''start%25%27%22%0D%0A%C3%9Fend"[..]
);
}

12
src/async_impl/request.rs
View File

@@ -6,9 +6,9 @@ use serde_json;
use serde_urlencoded;
use super::body::{Body};
use super::multipart as multipart_;
use super::multipart;
use super::client::{Client, Pending};
use header::{CONTENT_TYPE, HeaderMap, HeaderName, HeaderValue};
use header::{CONTENT_LENGTH, CONTENT_TYPE, HeaderMap, HeaderName, HeaderValue};
use http::HttpTryFrom;
use {Method, Url};
@@ -207,7 +207,7 @@ impl RequestBuilder {
/// rt.block_on(response)
/// # }
/// ```
pub fn multipart(self, multipart: multipart_::Form) -> RequestBuilder {
pub fn multipart(self, mut multipart: multipart::Form) -> RequestBuilder {
let mut builder = self.header(
CONTENT_TYPE,
format!(
@@ -215,6 +215,12 @@ impl RequestBuilder {
multipart.boundary()
).as_str()
);
builder = match multipart.compute_length() {
Some(length) => builder.header(CONTENT_LENGTH, length),
None => builder,
};
if let Ok(ref mut req) = builder.request {
*req.body_mut() = Some(Body::wrap(multipart.stream()))
}

299
src/multipart.rs
View File

@@ -6,40 +6,33 @@ use std::io::{self, Cursor, Read};
use std::path::Path;
use mime_guess::{self, Mime};
use url::percent_encoding::{self, EncodeSet, PATH_SEGMENT_ENCODE_SET};
use uuid::Uuid;
use http::HeaderMap;
use async_impl::multipart::{FormParts, PartMetadata, PartProps};
use {Body};
/// A multipart/form-data request.
pub struct Form {
boundary: String,
fields: Vec<(Cow<'static, str>, Part)>,
headers: Vec<Vec<u8>>,
percent_encoding: PercentEncoding,
inner: FormParts<Part>,
}
pub(crate) enum PercentEncoding {
PathSegment,
AttrChar,
/// A field in a multipart form.
pub struct Part {
meta: PartMetadata,
value: Body,
}
impl Form {
/// Creates a new Form without any content.
pub fn new() -> Form {
Form {
boundary: format!("{}", Uuid::new_v4().to_simple()),
fields: Vec::new(),
headers: Vec::new(),
percent_encoding: PercentEncoding::PathSegment,
inner: FormParts::new(),
}
}
/// Get the boundary that this form will use.
#[inline]
pub fn boundary(&self) -> &str {
&self.boundary
self.inner.boundary()
}
/// Add a data field with supplied name and value.
@@ -83,23 +76,21 @@ impl Form {
}
/// Adds a customized Part.
pub fn part<T>(mut self, name: T, part: Part) -> Form
where T: Into<Cow<'static, str>>,
pub fn part<T>(self, name: T, part: Part) -> Form
where
T: Into<Cow<'static, str>>,
{
self.fields.push((name.into(), part));
self
self.with_inner(move |inner| inner.part(name, part))
}
/// Configure this `Form` to percent-encode using the `path-segment` rules.
pub fn percent_encode_path_segment(mut self) -> Form {
self.percent_encoding = PercentEncoding::PathSegment;
self
pub fn percent_encode_path_segment(self) -> Form {
self.with_inner(|inner| inner.percent_encode_path_segment())
}
/// Configure this `Form` to percent-encode using the `attr-char` rules.
pub fn percent_encode_attr_chars(mut self) -> Form {
self.percent_encoding = PercentEncoding::AttrChar;
self
pub fn percent_encode_attr_chars(self) -> Form {
self.with_inner(|inner| inner.percent_encode_attr_chars())
}
pub(crate) fn reader(self) -> Reader {
@@ -110,58 +101,25 @@ impl Form {
// The length should be preditable if only String and file fields have been added,
// but not if a generic reader has been added;
pub(crate) fn compute_length(&mut self) -> Option<u64> {
let mut length = 0u64;
for &(ref name, ref field) in self.fields.iter() {
match field.value.len() {
Some(value_length) => {
// We are constructing the header just to get its length. To not have to
// construct it again when the request is sent we cache these headers.
let header = self.percent_encoding.encode_headers(name, field);
let header_length = header.len();
self.headers.push(header);
// The additions mimick the format string out of which the field is constructed
// in Reader. Not the cleanest solution because if that format string is
// ever changed then this formula needs to be changed too which is not an
// obvious dependency in the code.
length += 2 + self.boundary.len() as u64 + 2 + header_length as u64 + 4 + value_length + 2
self.inner.compute_length()
}
_ => return None,
fn with_inner<F>(self, func: F) -> Self
where
F: FnOnce(FormParts<Part>) -> FormParts<Part>,
{
Form {
inner: func(self.inner),
}
}
// If there is a at least one field there is a special boundary for the very last field.
if self.fields.len() != 0 {
length += 2 + self.boundary.len() as u64 + 4
}
Some(length)
}
}
impl fmt::Debug for Form {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Form")
.field("boundary", &self.boundary)
.field("parts", &self.fields)
.finish()
self.inner.fmt_fields("Form", f)
}
}
pub(crate) trait PartProp {
fn mime(&self) -> &Option<Mime>;
fn mime_mut(&mut self) -> &mut Option<Mime>;
fn file_name(&self) -> &Option<Cow<'static, str>>;
fn file_name_mut(&mut self) -> &mut Option<Cow<'static, str>>;
fn headers(&self) -> &HeaderMap;
fn headers_mut(&mut self) -> &mut HeaderMap;
}
/// A field in a multipart form.
pub struct Part {
value: Body,
mime: Option<Mime>,
file_name: Option<Cow<'static, str>>,
headers: HeaderMap,
}
impl Part {
/// Makes a text parameter.
@@ -175,7 +133,7 @@ impl Part {
Part::new(body)
}
/// Makes a new parameter from arbitrary bytes
/// Makes a new parameter from arbitrary bytes.
pub fn bytes<T>(value: T) -> Part
where T: Into<Cow<'static, [u8]>>
{
@@ -208,84 +166,75 @@ impl Part {
pub fn file<T: AsRef<Path>>(path: T) -> io::Result<Part> {
let path = path.as_ref();
let file_name = path.file_name().and_then(|filename| {
Some(Cow::from(filename.to_string_lossy().into_owned()))
Some(filename.to_string_lossy().into_owned())
});
let ext = path.extension()
.and_then(|ext| ext.to_str())
.unwrap_or("");
let mime = mime_guess::get_mime_type(ext);
let file = File::open(path)?;
let mut field = Part::new(Body::from(file));
field.mime = Some(mime);
field.file_name = file_name;
Ok(field)
let field = Part::new(Body::from(file))
.mime(mime);
Ok(if let Some(file_name) = file_name {
field.file_name(file_name)
} else {
field
})
}
fn new(value: Body) -> Part {
Part {
value: value,
mime: None,
file_name: None,
headers: HeaderMap::default()
meta: PartMetadata::new(),
value,
}
}
/// Tries to set the mime of this part.
pub fn mime_str(mut self, mime: &str) -> ::Result<Part> {
self.mime = Some(try_!(mime.parse()));
Ok(self)
pub fn mime_str(self, mime: &str) -> ::Result<Part> {
Ok(self.mime(try_!(mime.parse())))
}
// Re-enable when mime 0.4 is available, with split MediaType/MediaRange.
#[cfg(test)]
fn mime(mut self, mime: Mime) -> Part {
self.mime = Some(mime);
self
// Re-export when mime 0.4 is available, with split MediaType/MediaRange.
fn mime(self, mime: Mime) -> Part {
self.with_inner(move |inner| inner.mime(mime))
}
/// Sets the filename, builder style.
pub fn file_name<T: Into<Cow<'static, str>>>(mut self, filename: T) -> Part {
self.file_name = Some(filename.into());
self
pub fn file_name<T>(self, filename: T) -> Part
where
T: Into<Cow<'static, str>>,
{
self.with_inner(move |inner| inner.file_name(filename))
}
}
impl PartProp for Part {
fn mime(&self) -> &Option<Mime> {
&self.mime
fn with_inner<F>(self, func: F) -> Self
where
F: FnOnce(PartMetadata) -> PartMetadata,
{
Part {
meta: func(self.meta),
value: self.value,
}
fn mime_mut(&mut self) -> &mut Option<Mime> {
&mut self.mime
}
fn file_name(&self) -> &Option<Cow<'static, str>> {
&self.file_name
}
fn file_name_mut(&mut self) -> &mut Option<Cow<'static, str>> {
&mut self.file_name
}
fn headers(&self) -> &HeaderMap {
&self.headers
}
fn headers_mut(&mut self) -> &mut HeaderMap {
&mut self.headers
}
}
impl fmt::Debug for Part {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Part")
.field("value", &self.value)
.field("mime", &self.mime)
.field("file_name", &self.file_name)
.field("headers", &self.headers)
.finish()
let mut dbg = f.debug_struct("Part");
dbg.field("value", &self.value);
self.meta.fmt_fields(&mut dbg);
dbg.finish()
}
}
impl PartProps for Part {
fn value_len(&self) -> Option<u64> {
self.value.len()
}
fn metadata(&self) -> &PartMetadata {
&self.meta
}
}
@@ -313,16 +262,16 @@ impl Reader {
}
fn next_reader(&mut self) {
self.active_reader = if self.form.fields.len() != 0 {
self.active_reader = if self.form.inner.fields.len() != 0 {
// We need to move out of the vector here because we are consuming the field's reader
let (name, field) = self.form.fields.remove(0);
let boundary = Cursor::new(format!("--{}\r\n", self.form.boundary));
let (name, field) = self.form.inner.fields.remove(0);
let boundary = Cursor::new(format!("--{}\r\n", self.form.boundary()));
let header = Cursor::new({
// Try to use cached headers created by compute_length
let mut h = if self.form.headers.len() > 0 {
self.form.headers.remove(0)
let mut h = if self.form.inner.computed_headers.len() > 0 {
self.form.inner.computed_headers.remove(0)
} else {
self.form.percent_encoding.encode_headers(&name, &field)
self.form.inner.percent_encoding.encode_headers(&name, field.metadata())
};
h.extend_from_slice(b"\r\n\r\n");
h
@@ -333,11 +282,11 @@ impl Reader {
.chain(Cursor::new("\r\n"));
// According to https://tools.ietf.org/html/rfc2046#section-5.1.1
// the very last field has a special boundary
if self.form.fields.len() != 0 {
if self.form.inner.fields.len() != 0 {
Some(Box::new(reader))
} else {
Some(Box::new(reader.chain(Cursor::new(
format!("--{}--\r\n", self.form.boundary),
format!("--{}--\r\n", self.form.boundary()),
))))
}
} else {
@@ -368,78 +317,6 @@ impl Read for Reader {
}
}
#[derive(Debug, Clone)]
pub(crate) struct AttrCharEncodeSet;
impl EncodeSet for AttrCharEncodeSet {
fn contains(&self, ch: u8) -> bool {
match ch as char {
'!' => false,
'#' => false,
'$' => false,
'&' => false,
'+' => false,
'-' => false,
'.' => false,
'^' => false,
'_' => false,
'`' => false,
'|' => false,
'~' => false,
_ => {
let is_alpha_numeric = ch >= 0x41 && ch <= 0x5a || ch >= 0x61 && ch <= 0x7a || ch >= 0x30 && ch <= 0x39;
!is_alpha_numeric
}
}
}
}
impl PercentEncoding {
pub fn encode_headers<T: PartProp>(&self, name: &str, field: &T) -> Vec<u8> {
let s = format!(
"Content-Disposition: form-data; {}{}{}",
self.format_parameter("name", name),
match *field.file_name() {
Some(ref file_name) => format!("; {}", self.format_parameter("filename", file_name)),
None => String::new(),
},
match *field.mime() {
Some(ref mime) => format!("\r\nContent-Type: {}", mime),
None => "".to_string(),
},
);
field.headers().iter().fold(s.into_bytes(), |mut header, (k,v)| {
header.extend_from_slice(b"\r\n");
header.extend_from_slice(k.as_str().as_bytes());
header.extend_from_slice(b": ");
header.extend_from_slice(v.as_bytes());
header
})
}
fn format_parameter(&self, name: &str, value: &str) -> String {
let legal_value = match *self {
PercentEncoding::PathSegment => {
percent_encoding::utf8_percent_encode(value, PATH_SEGMENT_ENCODE_SET)
.to_string()
},
PercentEncoding::AttrChar => {
percent_encoding::utf8_percent_encode(value, AttrCharEncodeSet)
.to_string()
},
};
if value.len() == legal_value.len() {
// nothing has been percent encoded
format!("{}=\"{}\"", name, value)
} else {
// something has been percent encoded
format!("{}*=utf-8''{}", name, legal_value)
}
}
}
#[cfg(test)]
mod tests {
use super::*;
@@ -469,7 +346,7 @@ mod tests {
"key3",
Part::text("value3").file_name("filename"),
);
form.boundary = "boundary".to_string();
form.inner.boundary = "boundary".to_string();
let length = form.compute_length();
let expected = "--boundary\r\n\
Content-Disposition: form-data; name=\"reader1\"\r\n\r\n\
@@ -511,7 +388,7 @@ mod tests {
"key3",
Part::text("value3").file_name("filename"),
);
form.boundary = "boundary".to_string();
form.inner.boundary = "boundary".to_string();
let length = form.compute_length();
let expected = "--boundary\r\n\
Content-Disposition: form-data; name=\"key1\"\r\n\r\n\
@@ -538,9 +415,9 @@ mod tests {
fn read_to_end_with_header() {
let mut output = Vec::new();
let mut part = Part::text("value2").mime(::mime::IMAGE_BMP);
part.headers_mut().insert("Hdr3", "/a/b/c".parse().unwrap());
part.meta.headers.insert("Hdr3", "/a/b/c".parse().unwrap());
let mut form = Form::new().part("key2", part);
form.boundary = "boundary".to_string();
form.inner.boundary = "boundary".to_string();
let expected = "--boundary\r\n\
Content-Disposition: form-data; name=\"key2\"\r\n\
Content-Type: image/bmp\r\n\
@@ -557,20 +434,4 @@ mod tests {
println!("START EXPECTED\n{}\nEND EXPECTED", expected);
assert_eq!(::std::str::from_utf8(&output).unwrap(), expected);
}
#[test]
fn header_percent_encoding() {
let name = "start%'\"\r\nßend";
let field = Part::text("");
assert_eq!(
PercentEncoding::PathSegment.encode_headers(name, &field),
&b"Content-Disposition: form-data; name*=utf-8''start%25'%22%0D%0A%C3%9Fend"[..]
);
assert_eq!(
PercentEncoding::AttrChar.encode_headers(name, &field),
&b"Content-Disposition: form-data; name*=utf-8''start%25%27%22%0D%0A%C3%9Fend"[..]
);
}
}