82 lines
2.2 KiB
Go
82 lines
2.2 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package browser
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import (
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"context"
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"net/url"
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"github.com/chromedp/chromedp"
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"go.probo.inc/probo/pkg/agent"
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)
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type (
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extractLinksParams struct {
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URL string `json:"url" jsonschema:"The URL to extract links from"`
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}
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link struct {
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Href string `json:"href"`
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Text string `json:"text"`
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}
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)
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func ExtractLinksTool(b *Browser) agent.Tool {
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return agent.FunctionTool(
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"extract_links",
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"Navigate to a URL and extract all links (<a> elements) with their href and text.",
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func(ctx context.Context, p extractLinksParams) (agent.ToolResult, error) {
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if r := b.checkAlive(); r != nil {
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return *r, nil
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}
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u, err := url.Parse(p.URL)
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if err != nil || (u.Scheme != "http" && u.Scheme != "https") {
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return agent.ResultError("invalid URL scheme: only http and https are allowed"), nil
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}
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if r := b.checkURL(p.URL); r != nil {
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return *r, nil
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}
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ctx, timeoutCancel := withToolTimeout(ctx)
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defer timeoutCancel()
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tabCtx, cancel := b.NewTab(ctx)
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defer cancel()
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var links []link
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err = chromedp.Run(
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tabCtx,
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chromedp.Navigate(p.URL),
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waitForPage(),
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chromedp.Evaluate(
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`Array.from(document.querySelectorAll("a[href]")).map(a => ({
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href: a.href,
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text: a.innerText.trim().substring(0, 200)
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}))`,
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&links,
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),
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)
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if err != nil {
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return agent.ResultError(b.classifyError(ctx, p.URL, err)), nil
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}
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return agent.ResultJSON(links), nil
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},
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)
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}
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