Remove headers, use string range header

Cargo.toml

@@ -44,7 +44,6 @@ clap = "^2.29"
 error-chain = "^0.12"
 flate2 = "^1.0"
 fs2 = "^0.4"
-headers = "^0.2"
 lazy_static = "^1.2"
 libc = "^0.2"
 tempfile = "^3.0"

src/io/itarbundle.rs

@@ -3,7 +3,7 @@
 // Licensed under the MIT License.
 
 use flate2::read::GzDecoder;
-use reqwest::{header::HeaderMap, Client, RedirectPolicy, Response, StatusCode};
+use reqwest::{header::RANGE, Client, RedirectPolicy, Response, StatusCode};
 use std::collections::HashMap;
 use std::ffi::{OsStr, OsString};
 use std::io::{BufRead, BufReader, Cursor, Read};
@@ -44,12 +44,8 @@ impl RangeRead for HttpRangeReader {
 
     fn read_range(&mut self, offset: u64, length: usize) -> Result<Response> {
         let end_inclusive = offset + length as u64 - 1;
-
-        let mut headers = HeaderMap::new();
-        use headers::HeaderMapExt;
-        headers.typed_insert(headers::Range::bytes(offset..=end_inclusive).unwrap());
-
-        let res = self.client.get(&self.url).headers(headers).send()?;
+        let range = format!("bytes={}-{}", offset, end_inclusive);
+        let res = self.client.get(&self.url).header(RANGE, range).send()?;
 
         if res.status() != StatusCode::PARTIAL_CONTENT {
             return Err(Error::from(ErrorKind::UnexpectedHttpResponse(

src/lib.rs

@@ -54,7 +54,6 @@ extern crate app_dirs;
 extern crate error_chain;
 extern crate flate2;
 extern crate fs2;
-extern crate headers;
 #[macro_use]
 extern crate lazy_static;
 extern crate libc;