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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
use anyhow::Context;
use cargo_util::Sha256;
use crate::core::PackageId;
use crate::sources::registry::make_dep_prefix;
use crate::sources::registry::MaybeLock;
use crate::sources::registry::{
RegistryConfig, CHECKSUM_TEMPLATE, CRATE_TEMPLATE, LOWER_PREFIX_TEMPLATE, PREFIX_TEMPLATE,
VERSION_TEMPLATE,
};
use crate::util::auth;
use crate::util::errors::CargoResult;
use crate::util::{Config, Filesystem};
use std::fmt::Write as FmtWrite;
use std::fs::{self, File, OpenOptions};
use std::io::prelude::*;
use std::io::SeekFrom;
use std::str;
pub(super) fn filename(pkg: PackageId) -> String {
format!("{}-{}.crate", pkg.name(), pkg.version())
}
pub(super) fn download(
cache_path: &Filesystem,
config: &Config,
pkg: PackageId,
checksum: &str,
registry_config: RegistryConfig,
) -> CargoResult<MaybeLock> {
let filename = filename(pkg);
let path = cache_path.join(&filename);
let path = config.assert_package_cache_locked(&path);
if let Ok(dst) = File::open(path) {
let meta = dst.metadata()?;
if meta.len() > 0 {
return Ok(MaybeLock::Ready(dst));
}
}
let mut url = registry_config.dl;
if !url.contains(CRATE_TEMPLATE)
&& !url.contains(VERSION_TEMPLATE)
&& !url.contains(PREFIX_TEMPLATE)
&& !url.contains(LOWER_PREFIX_TEMPLATE)
&& !url.contains(CHECKSUM_TEMPLATE)
{
write!(
url,
"/{}/{}/download",
pkg.name(),
pkg.version().to_string()
)
.unwrap();
} else {
let prefix = make_dep_prefix(&*pkg.name());
url = url
.replace(CRATE_TEMPLATE, &*pkg.name())
.replace(VERSION_TEMPLATE, &pkg.version().to_string())
.replace(PREFIX_TEMPLATE, &prefix)
.replace(LOWER_PREFIX_TEMPLATE, &prefix.to_lowercase())
.replace(CHECKSUM_TEMPLATE, checksum);
}
let authorization = if registry_config.auth_required {
Some(auth::auth_token(config, &pkg.source_id(), None, None)?)
} else {
None
};
Ok(MaybeLock::Download {
url,
descriptor: pkg.to_string(),
authorization: authorization,
})
}
pub(super) fn finish_download(
cache_path: &Filesystem,
config: &Config,
pkg: PackageId,
checksum: &str,
data: &[u8],
) -> CargoResult<File> {
let actual = Sha256::new().update(data).finish_hex();
if actual != checksum {
anyhow::bail!("failed to verify the checksum of `{}`", pkg)
}
let filename = filename(pkg);
cache_path.create_dir()?;
let path = cache_path.join(&filename);
let path = config.assert_package_cache_locked(&path);
let mut dst = OpenOptions::new()
.create(true)
.read(true)
.write(true)
.open(&path)
.with_context(|| format!("failed to open `{}`", path.display()))?;
let meta = dst.metadata()?;
if meta.len() > 0 {
return Ok(dst);
}
dst.write_all(data)?;
dst.seek(SeekFrom::Start(0))?;
Ok(dst)
}
pub(super) fn is_crate_downloaded(
cache_path: &Filesystem,
config: &Config,
pkg: PackageId,
) -> bool {
let path = cache_path.join(filename(pkg));
let path = config.assert_package_cache_locked(&path);
if let Ok(meta) = fs::metadata(path) {
return meta.len() > 0;
}
false
}