servo-fetch-cli 0.10.0

A browser engine in a binary — fetch, render, and extract web content as Markdown, JSON, or screenshots. Powered by Servo.
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

//! Output formatters for stdout (Markdown, JSON, screenshot, raw).

use std::io::Write;

use anyhow::{Result, bail};

use servo_fetch::Page;

pub(crate) struct Markdown<'a> {
    pub page: &'a Page,
    pub url: &'a str,
    pub selector: Option<&'a str>,
}

impl Markdown<'_> {
    pub(crate) fn execute(&self) -> Result<()> {
        let md = if let Some(selector) = self.selector {
            let input = servo_fetch::extract::ExtractInput::new(&self.page.html, self.url)
                .with_layout_json(self.page.layout_json.as_deref())
                .with_inner_text(Some(&self.page.inner_text))
                .with_selector(Some(selector));
            let text = servo_fetch::extract::extract_text(&input)?;
            if text.is_empty() {
                tracing::warn!(selector, "no elements matched the selector");
            }
            text
        } else {
            self.page.markdown_with_url(self.url)?
        };
        write!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(&md))?;
        Ok(())
    }
}

pub(crate) struct Json<'a> {
    pub page: &'a Page,
    pub url: &'a str,
    pub selector: Option<&'a str>,
}

impl Json<'_> {
    pub(crate) fn execute(&self) -> Result<()> {
        let json = self.render()?;
        writeln!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(&json))?;
        Ok(())
    }

    /// Emit a single-line NDJSON record for batch output.
    pub(crate) fn execute_compact(&self) -> Result<()> {
        let pretty = self.render()?;
        let line = serde_json::from_str::<serde_json::Value>(&pretty)
            .ok()
            .and_then(|v| serde_json::to_string(&v).ok())
            .unwrap_or(pretty);
        writeln!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(&line))?;
        Ok(())
    }

    fn render(&self) -> Result<String> {
        if let Some(selector) = self.selector {
            let input = servo_fetch::extract::ExtractInput::new(&self.page.html, self.url)
                .with_layout_json(self.page.layout_json.as_deref())
                .with_inner_text(Some(&self.page.inner_text))
                .with_selector(Some(selector));
            Ok(servo_fetch::extract::extract_json(&input)?)
        } else {
            Ok(self.page.extract_json_with_url(self.url)?)
        }
    }
}

pub(crate) struct Screenshot<'a> {
    pub page: &'a Page,
    pub path: &'a str,
}

impl Screenshot<'_> {
    pub(crate) fn execute(&self) -> Result<()> {
        match self.page.screenshot_png() {
            Some(png) => {
                std::fs::write(self.path, png)?;
                tracing::info!(path = %self.path, "screenshot saved");
                Ok(())
            }
            None => bail!("failed to capture screenshot — the page may not have rendered correctly"),
        }
    }
}

pub(crate) struct JsEval<'a> {
    pub result: &'a str,
}

impl JsEval<'_> {
    pub(crate) fn execute(&self) -> Result<()> {
        writeln!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(self.result))?;
        Ok(())
    }
}

pub(crate) struct Extracted<'a> {
    pub page: &'a Page,
    pub url: &'a str,
}

impl Extracted<'_> {
    pub(crate) fn execute(&self) -> Result<()> {
        let body = serde_json::to_string_pretty(&self.payload())?;
        writeln!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(&body))?;
        Ok(())
    }

    /// Emit a single-line NDJSON record for batch output.
    pub(crate) fn execute_compact(&self) -> Result<()> {
        let line = serde_json::to_string(&self.payload())?;
        writeln!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(&line))?;
        Ok(())
    }

    fn payload(&self) -> serde_json::Value {
        serde_json::json!({
            "url": self.url,
            "extracted": self.page.extracted.as_ref().unwrap_or(&serde_json::Value::Null),
        })
    }
}

pub(crate) struct Raw<'a> {
    pub page: &'a Page,
    pub mode: &'a crate::cli::RawMode,
}

impl Raw<'_> {
    pub(crate) fn execute(&self) -> Result<()> {
        let content = match self.mode {
            crate::cli::RawMode::Html => self.page.html.as_str(),
            crate::cli::RawMode::Text => &self.page.inner_text,
        };
        write!(std::io::stdout(), "{}", servo_fetch::sanitize::sanitize(content))?;
        Ok(())
    }
}