agent-browser 0.19.0

Fast browser automation CLI for AI agents
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

use async_trait::async_trait;
use serde_json::Value;

/// Abstract backend for browser automation. CDP (Chromium) and WebDriver
/// (Safari/iOS) share this interface so actions.rs can remain backend-agnostic
/// in the future.
#[async_trait]
pub trait BrowserBackend: Send + Sync {
    async fn navigate(&self, url: &str) -> Result<(), String>;
    async fn get_url(&self) -> Result<String, String>;
    async fn get_title(&self) -> Result<String, String>;
    async fn get_content(&self) -> Result<String, String>;
    async fn evaluate(&self, script: &str) -> Result<Value, String>;
    async fn screenshot(&self) -> Result<String, String>;
    async fn click(&self, selector: &str) -> Result<(), String>;
    async fn fill(&self, selector: &str, value: &str) -> Result<(), String>;
    async fn close(&mut self) -> Result<(), String>;
    async fn back(&self) -> Result<(), String>;
    async fn forward(&self) -> Result<(), String>;
    async fn reload(&self) -> Result<(), String>;
    async fn get_cookies(&self) -> Result<Value, String>;
    fn backend_type(&self) -> &str;

    fn supports(&self, feature: &str) -> bool {
        match feature {
            "navigate" | "evaluate" | "screenshot" | "click" | "fill" => true,
            "screencast" | "tracing" | "network_intercept" | "cdp" => self.backend_type() == "cdp",
            _ => false,
        }
    }

    fn unsupported_error(&self, action: &str) -> String {
        format!(
            "Action '{}' is not supported on the {} backend",
            action,
            self.backend_type()
        )
    }
}

/// WebDriver implementation of BrowserBackend
pub struct WebDriverBackend {
    client: super::client::WebDriverClient,
}

impl WebDriverBackend {
    pub fn new(client: super::client::WebDriverClient) -> Self {
        Self { client }
    }
}

#[async_trait]
impl BrowserBackend for WebDriverBackend {
    async fn navigate(&self, url: &str) -> Result<(), String> {
        self.client.navigate(url).await
    }

    async fn get_url(&self) -> Result<String, String> {
        self.client.get_url().await
    }

    async fn get_title(&self) -> Result<String, String> {
        self.client.get_title().await
    }

    async fn get_content(&self) -> Result<String, String> {
        self.client.get_page_source().await
    }

    async fn evaluate(&self, script: &str) -> Result<Value, String> {
        self.client.execute_script(script, vec![]).await
    }

    async fn screenshot(&self) -> Result<String, String> {
        self.client.screenshot().await
    }

    async fn click(&self, selector: &str) -> Result<(), String> {
        let element_id = self.client.find_element("css selector", selector).await?;
        self.client.click_element(&element_id).await
    }

    async fn fill(&self, selector: &str, value: &str) -> Result<(), String> {
        let element_id = self.client.find_element("css selector", selector).await?;
        self.client.clear_element(&element_id).await?;
        self.client.send_keys(&element_id, value).await
    }

    async fn close(&mut self) -> Result<(), String> {
        self.client.delete_session().await
    }

    async fn back(&self) -> Result<(), String> {
        self.client.back().await
    }

    async fn forward(&self) -> Result<(), String> {
        self.client.forward().await
    }

    async fn reload(&self) -> Result<(), String> {
        self.client.refresh().await
    }

    async fn get_cookies(&self) -> Result<Value, String> {
        self.client.get_cookies().await
    }

    fn backend_type(&self) -> &str {
        "webdriver"
    }
}

/// CDP-backed backend constants for unsupported actions on WebDriver
pub const WEBDRIVER_UNSUPPORTED_ACTIONS: &[&str] = &[
    "screencast_start",
    "screencast_stop",
    "trace_start",
    "trace_stop",
    "profiler_start",
    "profiler_stop",
    "route",
    "unroute",
    "expose",
    "addscript",
    "addinitscript",
    "network",
    "har_start",
    "har_stop",
];

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

    #[test]
    fn test_unsupported_actions() {
        assert!(WEBDRIVER_UNSUPPORTED_ACTIONS.contains(&"screencast_start"));
        assert!(WEBDRIVER_UNSUPPORTED_ACTIONS.contains(&"trace_start"));
        assert!(!WEBDRIVER_UNSUPPORTED_ACTIONS.contains(&"navigate"));
    }
}