fix systemd-encoded upid strings in http client

since we systemd-encode parts of the upid string, and those can contain
characters that are invalid in urls (e.g. '\'), we have to percent encode
those

add a 'percent_encode_component' helper, so that we can maybe change
the AsciiSet for all uses at the same time

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

src/tools.rs

@@ -12,7 +12,7 @@ use std::path::Path;
 use anyhow::{bail, format_err, Error};
 use serde_json::Value;
 use openssl::hash::{hash, DigestBytes, MessageDigest};
-use percent_encoding::AsciiSet;
+use percent_encoding::{utf8_percent_encode, AsciiSet};
 
 pub use proxmox::tools::fd::Fd;
 
@@ -289,6 +289,11 @@ pub fn extract_cookie(cookie: &str, cookie_name: &str) -> Option<String> {
     None
 }
 
+/// percent encode a url component
+pub fn percent_encode_component(comp: &str) -> String {
+    utf8_percent_encode(comp, percent_encoding::NON_ALPHANUMERIC).to_string()
+}
+
 pub fn join(data: &Vec<String>, sep: char) -> String {
     let mut list = String::new();