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use std::collections::HashMap;
use std::io::Read;
use bucket::Bucket;
use chrono::{DateTime, Utc};
use command::Command;
use error::S3Error;
use hmac::{Hmac, Mac};
use reqwest;
use reqwest::header::{self, HeaderMap, HeaderName, HeaderValue};
use sha2::{Digest, Sha256};
use hex::ToHex;
use url::Url;
use serde_xml;
use serde_types::AwsError;
use signing;
use error::{S3Result, ErrorKind};
use EMPTY_PAYLOAD_SHA;
use LONG_DATE;
pub type Headers = HashMap<String, String>;
pub type Query = HashMap<String, String>;
pub struct Request<'a> {
pub bucket: &'a Bucket,
pub path: &'a str,
pub command: Command<'a>,
pub datetime: DateTime<Utc>,
}
impl<'a> Request<'a> {
pub fn new<'b>(bucket: &'b Bucket, path: &'b str, command: Command<'b>) -> Request<'b> {
Request {
bucket,
path,
command,
datetime: Utc::now(),
}
}
fn url(&self) -> Url {
let mut url_str = format!("{}://{}", self.bucket.scheme(), self.bucket.host());
url_str.push_str("/");
url_str.push_str(self.bucket.name());
if !self.path.starts_with('/') {
url_str.push_str("/");
}
url_str.push_str(&signing::uri_encode(self.path, false));
let mut url = Url::parse(&url_str).expect("static URL parsing");
for (key, value) in &self.bucket.extra_query {
url.query_pairs_mut().append_pair(key, value);
}
if let Command::List { prefix, delimiter, continuation_token } = self.command {
let mut query_pairs = url.query_pairs_mut();
delimiter.map(|d| query_pairs.append_pair("delimiter", d));
query_pairs.append_pair("prefix", prefix);
query_pairs.append_pair("list-type", "2");
if let Some(token) = continuation_token {
query_pairs.append_pair("continuation-token", token);
}
}
url
}
fn content_length(&self) -> usize {
match self.command {
Command::Put { content, .. } => content.len(),
_ => 0,
}
}
fn content_type(&self) -> String {
match self.command {
Command::Put { content_type, .. } => content_type.into(),
_ => "text/plain".into(),
}
}
fn sha256(&self) -> String {
match self.command {
Command::Put { content, .. } => {
let mut sha = Sha256::default();
sha.input(content);
sha.result().as_slice().to_hex()
}
_ => EMPTY_PAYLOAD_SHA.into(),
}
}
fn long_date(&self) -> String {
self.datetime.format(LONG_DATE).to_string()
}
fn canonical_request(&self, headers: &HeaderMap) -> String {
signing::canonical_request(
self.command.http_verb().as_str(),
&self.url(),
headers,
&self.sha256(),
)
}
fn string_to_sign(&self, request: &str) -> String {
signing::string_to_sign(&self.datetime, &self.bucket.region(), request)
}
fn signing_key(&self) -> Vec<u8> {
signing::signing_key(
&self.datetime,
self.bucket.secret_key(),
&self.bucket.region(),
"s3",
)
}
fn authorization(&self, headers: &HeaderMap) -> String {
let canonical_request = self.canonical_request(headers);
let string_to_sign = self.string_to_sign(&canonical_request);
let mut hmac = Hmac::<Sha256>::new(&self.signing_key());
hmac.input(string_to_sign.as_bytes());
let signature = hmac.result().code().to_hex();
let signed_header = signing::signed_header_string(headers);
signing::authorization_header(
self.bucket.access_key(),
&self.datetime,
&self.bucket.region(),
&signed_header,
&signature,
)
}
fn headers(&self) -> S3Result<HeaderMap> {
let sha256 = self.sha256();
let mut headers = self
.bucket
.extra_headers
.iter()
.map(|(k, v)| Ok((k.parse::<HeaderName>()?, v.parse::<HeaderValue>()?)))
.collect::<Result<HeaderMap, S3Error>>()?;
headers.insert(header::HOST, self.bucket.host().parse()?);
headers.insert(
header::CONTENT_LENGTH,
self.content_length().to_string().parse()?,
);
headers.insert(header::CONTENT_TYPE, self.content_type().parse()?);
headers.insert("X-Amz-Content-Sha256", sha256.parse()?);
headers.insert("X-Amz-Date", self.long_date().parse()?);
if let Some(token) = self.bucket.credentials().token.as_ref() {
headers.insert("X-Amz-Security-Token", token.parse()?);
}
let authorization = self.authorization(&headers);
headers.insert(header::AUTHORIZATION, authorization.parse()?);
headers.insert(header::DATE, self.datetime.to_rfc2822().parse()?);
Ok(headers)
}
pub fn execute(&self) -> S3Result<(Vec<u8>, u32)> {
let client = if cfg!(feature = "no-verify-ssl") {
reqwest::Client::builder()
.danger_accept_invalid_certs(true)
.danger_accept_invalid_hostnames(true)
.build()?
} else {
reqwest::Client::new()
};
let headers = self.headers()?;
let content = if let Command::Put { content, .. } = self.command {
Vec::from(content)
} else {
Vec::new()
};
let request = client
.request(self.command.http_verb(), self.url())
.headers(headers)
.body(content);
let mut response = request.send()?;
let mut dst = Vec::new();
response.read_to_end(&mut dst)?;
let resp_code = u32::from(response.status().as_u16());
if resp_code < 300 {
Ok((dst, resp_code))
} else {
let deserialized: AwsError = serde_xml::deserialize(dst.as_slice())?;
let err = ErrorKind::AwsError {
info: deserialized,
status: resp_code,
body: String::from_utf8_lossy(dst.as_slice()).into_owned(),
};
Err(err.into())
}
}
}
#[cfg(test)]
mod tests {
use bucket::Bucket;
use command::Command;
use credentials::Credentials;
use request::Request;
fn fake_credentials() -> Credentials {
const ACCESS_KEY: &'static str = "AKIAIOSFODNN7EXAMPLE";
const SECRET_KEY: &'static str = "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY";
Credentials::new(Some(ACCESS_KEY.into()), Some(SECRET_KEY.into()), None, None)
}
#[test]
fn url_uses_https_by_default() {
let region = "custom-region".parse().unwrap();
let bucket = Bucket::new("my-first-bucket", region, fake_credentials());
let path = "/my-first/path";
let request = Request::new(&bucket, path, Command::Get);
assert_eq!(request.url().scheme(), "https");
let headers = request.headers().unwrap();
let host = headers.get("Host").unwrap();
assert_eq!(*host, "custom-region".to_string());
}
#[test]
fn url_uses_scheme_from_custom_region_if_defined() {
let region = "http://custom-region".parse().unwrap();
let bucket = Bucket::new("my-second-bucket", region, fake_credentials());
let path = "/my-second/path";
let request = Request::new(&bucket, path, Command::Get);
assert_eq!(request.url().scheme(), "http");
let headers = request.headers().unwrap();
let host = headers.get("Host").unwrap();
assert_eq!(*host, "custom-region".to_string());
}
}