hpx 2.4.18

High Performance HTTP Client
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104

#![allow(unused)]
use std::{fmt, fmt::Write};

use base64::prelude::*;
use bytes::Bytes;

use crate::header::{Entry, HeaderMap, HeaderValue, OccupiedEntry};

pub(crate) fn basic_auth<U, P>(username: U, password: Option<P>) -> HeaderValue
where
    U: fmt::Display,
    P: fmt::Display,
{
    let encoded = {
        let mut buf = b"Basic ".to_vec();
        let mut buf_str = String::with_capacity(32);
        let _ = write!(buf_str, "{username}:");
        if let Some(password) = password {
            let _ = write!(buf_str, "{password}");
        }

        let encoded = BASE64_STANDARD.encode(buf_str.as_bytes());
        buf.extend(encoded.into_bytes());
        buf
    };

    let mut header = HeaderValue::from_maybe_shared(Bytes::from(encoded))
        .expect("base64 is always valid HeaderValue");
    header.set_sensitive(true);
    header
}

pub(crate) fn fast_random() -> u64 {
    rand::random::<u64>()
}

pub(crate) fn replace_headers(dst: &mut HeaderMap, src: HeaderMap) {
    // IntoIter of HeaderMap yields (Option<HeaderName>, HeaderValue).
    // The first time a name is yielded, it will be Some(name), and if
    // there are more values with the same name, the next yield will be
    // None.

    let mut prev_entry: Option<OccupiedEntry<_>> = None;
    for (key, value) in src {
        match key {
            Some(key) => match dst.entry(key) {
                Entry::Occupied(mut e) => {
                    e.insert(value);
                    prev_entry = Some(e);
                }
                Entry::Vacant(e) => {
                    let e = e.insert_entry(value);
                    prev_entry = Some(e);
                }
            },
            None => match prev_entry {
                Some(ref mut entry) => {
                    entry.append(value);
                }
                None => unreachable!("HeaderMap::into_iter yielded None first"),
            },
        }
    }
}

pub(crate) struct Escape<'a>(&'a [u8]);

impl<'a> Escape<'a> {
    pub(crate) fn new(bytes: &'a [u8]) -> Self {
        Escape(bytes)
    }
}

impl fmt::Debug for Escape<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "b\"{self}\"")?;
        Ok(())
    }
}

impl fmt::Display for Escape<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        for &c in self.0 {
            // https://doc.rust-lang.org/reference.html#byte-escapes
            if c == b'\n' {
                write!(f, "\\n")?;
            } else if c == b'\r' {
                write!(f, "\\r")?;
            } else if c == b'\t' {
                write!(f, "\\t")?;
            } else if c == b'\\' || c == b'"' {
                write!(f, "\\{}", c as char)?;
            } else if c == b'\0' {
                write!(f, "\\0")?;
            // ASCII printable
            } else if (0x20..0x7f).contains(&c) {
                write!(f, "{}", c as char)?;
            } else {
                write!(f, "\\x{c:02x}")?;
            }
        }
        Ok(())
    }
}