crawlex 1.0.4

Stealth crawler with Chrome-perfect TLS/H2 fingerprint, render pool, hooks, persistent queue
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
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
131
132
133
134
135
136
137
138
139
140
141
142
143

use std::{fmt, str::FromStr};

use super::metadata::LatestPatchVersionsPerBuild;
use super::{Result, VersionError};
use crate::render::chrome_fetcher::{BrowserHost, BrowserKind, BuildInfo, Runtime};

/// Represents a version of a browser (e.g. 113.0.5672).
/// The patch
#[derive(Clone, Copy, Debug, PartialOrd, Ord, PartialEq, Eq)]
pub struct Version {
    major: u32,
    minor: u32,
    build: u32,
    patch: Option<u32>,
}

impl Version {
    pub const fn new(major: u32, minor: u32, build: u32) -> Self {
        Self {
            major,
            minor,
            build,
            patch: None,
        }
    }

    pub const fn exact(major: u32, minor: u32, build: u32, patch: u32) -> Self {
        Self {
            major,
            minor,
            build,
            patch: Some(patch),
        }
    }

    pub(crate) async fn resolve(&self, kind: BrowserKind, host: &BrowserHost) -> Result<BuildInfo> {
        match kind {
            BrowserKind::Chromium => Err(VersionError::ResolveFailed(anyhow::anyhow!(
                "Build not supported for chromium"
            ))),
            BrowserKind::Chrome | BrowserKind::ChromeHeadlessShell => {
                if self.patch.is_some() {
                    return Ok(BuildInfo::version(self.to_string()));
                }

                let url = format!(
                    "{host}/chrome-for-testing/latest-patch-versions-per-build.json",
                    host = host.metadata
                );
                let latest_patch_versions_per_build =
                    Runtime::download_json::<LatestPatchVersionsPerBuild>(&url)
                        .await
                        .map_err(VersionError::ResolveFailed)?;
                let Some(version) = latest_patch_versions_per_build
                    .builds
                    .get(&self.to_string())
                else {
                    return Err(VersionError::InvalidBuild(self.to_string()));
                };
                Ok(BuildInfo::both(
                    version.version.clone(),
                    version.revision.parse()?,
                ))
            }
        }
    }
}

impl fmt::Display for Version {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}.{}.{}", self.major, self.minor, self.build)?;
        if let Some(patch) = self.patch {
            write!(f, ".{}", patch)?;
        }
        Ok(())
    }
}

impl FromStr for Version {
    type Err = VersionError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let parts = s.split('.').collect::<Vec<&str>>();

        if parts.len() < 3 || parts.len() > 4 {
            return Err(VersionError::InvalidBuild(s.to_string()));
        }

        Ok(Version {
            major: parts[0]
                .parse()
                .map_err(|_| VersionError::InvalidBuild(s.to_string()))?,
            minor: parts[1]
                .parse()
                .map_err(|_| VersionError::InvalidBuild(s.to_string()))?,
            build: parts[2]
                .parse()
                .map_err(|_| VersionError::InvalidBuild(s.to_string()))?,
            patch: if parts.len() == 4 {
                Some(
                    parts[3]
                        .parse()
                        .map_err(|_| VersionError::InvalidBuild(s.to_string()))?,
                )
            } else {
                None
            },
        })
    }
}

impl TryFrom<String> for Version {
    type Error = VersionError;

    fn try_from(value: String) -> Result<Self, Self::Error> {
        Self::from_str(&value)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_version_resolve_chrome() {
        let host = BrowserHost::current(BrowserKind::Chrome);
        let build_info = Version::new(113, 0, 5672)
            .resolve(BrowserKind::Chrome, &host)
            .await
            .unwrap();
        assert_eq!(build_info.id, "113.0.5672.63");
    }

    #[tokio::test]
    async fn test_version_resolve_chrome_patch() {
        let host = BrowserHost::current(BrowserKind::Chrome);
        let build_info = Version::exact(113, 0, 5672, 62)
            .resolve(BrowserKind::Chrome, &host)
            .await
            .unwrap();
        assert_eq!(build_info.id, "113.0.5672.62");
    }
}