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import {
BatchCrawlOptions,
CrawlResultItem,
AdvancedCrawlConfig,
CrawlEndpointResponse,
ExtractionStrategy,
TableExtractionStrategy,
MarkdownGeneratorOptions,
} from '../types.js';
import * as fs from 'fs/promises';
import * as path from 'path';
import * as os from 'os';
export class CrawlHandlers extends BaseHandler {
async batchCrawl(options: BatchCrawlOptions) {
try {
let response;
// Check if we have per-URL configs (new in 0.7.3/0.7.4)
if (options.configs && options.configs.length > 0) {
// Use the new configs array format
// Extract URLs from configs for the urls field
const urls = options.configs.map((config) => config.url);
const requestBody = {
urls: urls,
configs: options.configs,
max_concurrent: options.max_concurrent,
};
response = await this.axiosClient.post('/crawl', requestBody);
} else {
// Use the legacy format with single crawler_config
// Build crawler config if needed
const crawler_config: Record<string, unknown> = {};
// Handle remove_images by using exclude_tags
if (options.remove_images) {
crawler_config.exclude_tags = ['img', 'picture', 'svg'];
}
if (options.bypass_cache) {
crawler_config.cache_mode = 'BYPASS';
}
response = await this.axiosClient.post('/crawl', {
urls: options.urls,
max_concurrent: options.max_concurrent,
crawler_config: Object.keys(crawler_config).length > 0 ? crawler_config : undefined,
});
}
const results = response.data.results || [];
// Add memory metrics if available
let metricsText = '';
const responseData = response.data as CrawlEndpointResponse;
Iif (responseData.server_memory_delta_mb !== undefined || responseData.server_peak_memory_mb !== undefined) {
const memoryInfo = [];
Iif (responseData.server_processing_time_s !== undefined) {
memoryInfo.push(`Processing time: ${responseData.server_processing_time_s.toFixed(2)}s`);
}
Iif (responseData.server_memory_delta_mb !== undefined) {
memoryInfo.push(`Memory delta: ${responseData.server_memory_delta_mb.toFixed(1)}MB`);
}
Iif (responseData.server_peak_memory_mb !== undefined) {
memoryInfo.push(`Peak memory: ${responseData.server_peak_memory_mb.toFixed(1)}MB`);
}
Iif (memoryInfo.length > 0) {
metricsText = `\n\nServer metrics: ${memoryInfo.join(', ')}`;
}
}
return {
content: [
{
type: 'text',
text: `Batch crawl completed. Processed ${results.length} URLs:\n\n${results
.map(
(r: CrawlResultItem, i: number) => `${i + 1}. ${options.urls[i]}: ${r.success ? 'Success' : 'Failed'}`,
)
.join('\n')}${metricsText}`,
},
],
};
} catch (error) {
throw this.formatError(error, 'batch crawl');
}
}
async smartCrawl(options: { url: string; max_depth?: number; follow_links?: boolean; bypass_cache?: boolean }) {
try {
// First, try to detect the content type from URL or HEAD request
let contentType = '';
try {
const headResponse = await this.axiosClient.head(options.url);
contentType = headResponse.headers['content-type'] || '';
} catch {
// If HEAD request fails, continue anyway - we'll detect from the crawl response
console.debug('HEAD request failed, will detect content type from response');
}
let detectedType = 'html';
if (options.url.includes('sitemap') || options.url.endsWith('.xml')) {
detectedType = 'sitemap';
} else if (options.url.includes('rss') || options.url.includes('feed')) {
detectedType = 'rss';
} else if (contentType.includes('text/plain') || options.url.endsWith('.txt')) {
detectedType = 'text';
} else Iif (contentType.includes('application/xml') || contentType.includes('text/xml')) {
detectedType = 'xml';
} else if (contentType.includes('application/json')) {
detectedType = 'json';
}
// Crawl without the unsupported 'strategy' parameter
const response = await this.axiosClient.post('/crawl', {
urls: [options.url],
crawler_config: {
cache_mode: options.bypass_cache ? 'BYPASS' : 'ENABLED',
},
browser_config: {
headless: true,
browser_type: 'chromium',
},
});
const results = response.data.results || [];
const result = results[0] || {};
// Handle follow_links for sitemaps and RSS feeds
if (options.follow_links && (detectedType === 'sitemap' || detectedType === 'rss' || detectedType === 'xml')) {
// Extract URLs from the content
const urlPattern = /<loc>(.*?)<\/loc>|<link[^>]*>(.*?)<\/link>|href=["']([^"']+)["']/gi;
const content = result.markdown || result.html || '';
const foundUrls: string[] = [];
let match;
while ((match = urlPattern.exec(content)) !== null) {
const url = match[1] || match[2] || match[3];
if (url && url.startsWith('http')) {
foundUrls.push(url);
}
}
if (foundUrls.length > 0) {
// Limit to first 10 URLs to avoid overwhelming the system
const urlsToFollow = foundUrls.slice(0, Math.min(10, options.max_depth || 10));
// Crawl the found URLs
await this.axiosClient.post('/crawl', {
urls: urlsToFollow,
max_concurrent: 3,
bypass_cache: options.bypass_cache,
});
return {
content: [
{
type: 'text',
text: `Smart crawl detected content type: ${detectedType}\n\nMain content:\n${result.markdown?.raw_markdown || result.html || 'No content extracted'}\n\n---\nFollowed ${urlsToFollow.length} links:\n${urlsToFollow.map((url, i) => `${i + 1}. ${url}`).join('\n')}`,
},
...(result.metadata
? [
{
type: 'text',
text: `\n\n---\nMetadata:\n${JSON.stringify(result.metadata, null, 2)}`,
},
]
: []),
],
};
}
}
return {
content: [
{
type: 'text',
text: `Smart crawl detected content type: ${detectedType}\n\n${result.markdown?.raw_markdown || result.html || 'No content extracted'}`,
},
...(result.metadata
? [
{
type: 'text',
text: `\n\n---\nMetadata:\n${JSON.stringify(result.metadata, null, 2)}`,
},
]
: []),
],
};
} catch (error) {
throw this.formatError(error, 'smart crawl');
}
}
async crawlRecursive(options: {
url: string;
max_depth?: number;
max_pages?: number;
include_pattern?: string;
exclude_pattern?: string;
}) {
try {
const startUrl = new URL(options.url);
const visited = new Set<string>();
const toVisit: Array<{ url: string; depth: number }> = [{ url: options.url, depth: 0 }];
const results: Array<{ url: string; content: string; internal_links_found: number; depth: number }> = [];
let maxDepthReached = 0;
const includeRegex = options.include_pattern ? new RegExp(options.include_pattern) : null;
const excludeRegex = options.exclude_pattern ? new RegExp(options.exclude_pattern) : null;
const maxDepth = options.max_depth !== undefined ? options.max_depth : 3;
const maxPages = options.max_pages || 50;
while (toVisit.length > 0 && results.length < maxPages) {
const current = toVisit.shift();
Iif (!current || visited.has(current.url) || current.depth > maxDepth) {
continue;
}
visited.add(current.url);
try {
// Check URL patterns
Iif (excludeRegex && excludeRegex.test(current.url)) continue;
Iif (includeRegex && !includeRegex.test(current.url)) continue;
// Crawl the page using the crawl endpoint to get links
const response = await this.axiosClient.post('/crawl', {
urls: [current.url],
crawler_config: {
cache_mode: 'BYPASS',
},
});
const crawlResults = response.data.results || [response.data];
const result: CrawlResultItem = crawlResults[0];
if (result && result.success) {
const markdownContent = result.markdown?.fit_markdown || result.markdown?.raw_markdown || '';
const internalLinksCount = result.links?.internal?.length || 0;
maxDepthReached = Math.max(maxDepthReached, current.depth);
results.push({
url: current.url,
content: markdownContent,
internal_links_found: internalLinksCount,
depth: current.depth,
});
// Add internal links to crawl queue
if (current.depth < maxDepth && result.links?.internal) {
for (const linkObj of result.links.internal) {
const linkUrl = linkObj.href || linkObj;
try {
const absoluteUrl = new URL(linkUrl, current.url).toString();
if (!visited.has(absoluteUrl) && new URL(absoluteUrl).hostname === startUrl.hostname) {
toVisit.push({ url: absoluteUrl, depth: current.depth + 1 });
}
} catch (e) {
// Skip invalid URLs
console.debug('Invalid URL:', e);
}
}
}
}
} catch (error) {
// Log but continue crawling other pages
console.error(`Failed to crawl ${current.url}:`, error instanceof Error ? error.message : error);
}
}
// Prepare the output text
let outputText = `Recursive crawl completed:\n\nPages crawled: ${results.length}\nStarting URL: ${options.url}\n`;
if (results.length > 0) {
outputText += `Max depth reached: ${maxDepthReached} (limit: ${maxDepth})\n\nNote: Only internal links (same domain) are followed during recursive crawling.\n\nPages found:\n${results.map((r) => `- [Depth ${r.depth}] ${r.url}\n Content: ${r.content.length} chars\n Internal links found: ${r.internal_links_found}`).join('\n')}`;
} else {
outputText += `\nNo pages could be crawled. This might be due to:\n- The starting URL returned an error\n- No internal links were found\n- All discovered links were filtered out by include/exclude patterns`;
}
return {
content: [
{
type: 'text',
text: outputText,
},
],
};
} catch (error) {
throw this.formatError(error, 'crawl recursively');
}
}
async parseSitemap(options: { url: string; filter_pattern?: string }) {
try {
// Fetch the sitemap directly (not through Crawl4AI server)
const axios = (await import('axios')).default;
const response = await axios.get(options.url, {
timeout: 30000,
headers: {
'User-Agent': 'Mozilla/5.0 (compatible; MCP-Crawl4AI/1.0)',
},
});
const sitemapContent = response.data;
// Parse XML content - simple regex approach for basic sitemaps
const urlMatches = sitemapContent.match(/<loc>(.*?)<\/loc>/g) || [];
const urls = urlMatches.map((match: string) => match.replace(/<\/?loc>/g, ''));
// Apply filter if provided
let filteredUrls = urls;
if (options.filter_pattern) {
const filterRegex = new RegExp(options.filter_pattern);
filteredUrls = urls.filter((url: string) => filterRegex.test(url));
}
return {
content: [
{
type: 'text',
text: `Sitemap parsed successfully:\n\nTotal URLs found: ${urls.length}\nFiltered URLs: ${filteredUrls.length}\n\nURLs:\n${filteredUrls.slice(0, 100).join('\n')}${filteredUrls.length > 100 ? '\n... and ' + (filteredUrls.length - 100) + ' more' : ''}`,
},
],
};
} catch (error) {
throw this.formatError(error, 'parse sitemap');
}
}
async crawl(options: Record<string, unknown>) {
try {
// Ensure options is an object
if (!options || typeof options !== 'object') {
throw new Error('crawl requires options object with at least a url parameter');
}
// Build browser_config
const browser_config: Record<string, unknown> = {
headless: true, // Always true as noted
};
if (options.browser_type) browser_config.browser_type = options.browser_type;
if (options.viewport_width) browser_config.viewport_width = options.viewport_width;
if (options.viewport_height) browser_config.viewport_height = options.viewport_height;
if (options.user_agent) browser_config.user_agent = options.user_agent;
if (options.headers) browser_config.headers = options.headers;
if (options.cookies) browser_config.cookies = options.cookies;
// Handle proxy configuration - support both unified and legacy formats
Iif (options.proxy) {
// New unified format (0.7.3/0.7.4)
browser_config.proxy = options.proxy;
} else if (options.proxy_server) {
// Legacy format for backward compatibility
browser_config.proxy_config = {
server: options.proxy_server,
username: options.proxy_username,
password: options.proxy_password,
};
}
// Build crawler_config
const crawler_config: Record<string, unknown> = {};
// Content filtering
if (options.word_count_threshold !== undefined)
crawler_config.word_count_threshold = options.word_count_threshold;
if (options.excluded_tags) crawler_config.excluded_tags = options.excluded_tags;
if (options.remove_overlay_elements) crawler_config.remove_overlay_elements = options.remove_overlay_elements;
// JavaScript execution
if (options.js_code !== undefined && options.js_code !== null) {
// If js_code is an array, join it with newlines for the server
crawler_config.js_code = Array.isArray(options.js_code) ? options.js_code.join('\n') : options.js_code;
} else if (options.js_code === null) {
// If js_code is explicitly null, throw a helpful error
throw new Error('js_code parameter is null. Please provide JavaScript code as a string or array of strings.');
}
if (options.wait_for) crawler_config.wait_for = options.wait_for;
if (options.wait_for_timeout) crawler_config.wait_for_timeout = options.wait_for_timeout;
// Dynamic content
if (options.delay_before_scroll) crawler_config.delay_before_scroll = options.delay_before_scroll;
if (options.scroll_delay) crawler_config.scroll_delay = options.scroll_delay;
// Content processing
if (options.process_iframes) crawler_config.process_iframes = options.process_iframes;
if (options.exclude_external_links) crawler_config.exclude_external_links = options.exclude_external_links;
// Export options
if (options.screenshot) crawler_config.screenshot = options.screenshot;
if (options.pdf) crawler_config.pdf = options.pdf;
// Session and cache
if (options.session_id) {
crawler_config.session_id = options.session_id;
// Update session last_used time
const session = this.sessions.get(String(options.session_id));
if (session) {
session.last_used = new Date();
}
}
if (options.cache_mode) crawler_config.cache_mode = String(options.cache_mode).toLowerCase();
// Performance
Iif (options.timeout) crawler_config.timeout = options.timeout;
if (options.verbose) crawler_config.verbose = options.verbose;
// Additional crawler parameters
Iif (options.wait_until) crawler_config.wait_until = options.wait_until;
Iif (options.page_timeout) crawler_config.page_timeout = options.page_timeout;
Iif (options.wait_for_images) crawler_config.wait_for_images = options.wait_for_images;
Iif (options.ignore_body_visibility) crawler_config.ignore_body_visibility = options.ignore_body_visibility;
if (options.scan_full_page) crawler_config.scan_full_page = options.scan_full_page;
if (options.remove_forms) crawler_config.remove_forms = options.remove_forms;
if (options.keep_data_attributes) crawler_config.keep_data_attributes = options.keep_data_attributes;
Iif (options.excluded_selector) crawler_config.excluded_selector = options.excluded_selector;
if (options.only_text) crawler_config.only_text = options.only_text;
// Media handling
if (options.image_description_min_word_threshold !== undefined)
crawler_config.image_description_min_word_threshold = options.image_description_min_word_threshold;
if (options.image_score_threshold !== undefined)
crawler_config.image_score_threshold = options.image_score_threshold;
if (options.exclude_external_images) crawler_config.exclude_external_images = options.exclude_external_images;
if (options.screenshot_wait_for !== undefined) crawler_config.screenshot_wait_for = options.screenshot_wait_for;
// Link filtering
if (options.exclude_social_media_links)
crawler_config.exclude_social_media_links = options.exclude_social_media_links;
if (options.exclude_domains) crawler_config.exclude_domains = options.exclude_domains;
// Page interaction
if (options.js_only) crawler_config.js_only = options.js_only;
if (options.simulate_user) crawler_config.simulate_user = options.simulate_user;
if (options.override_navigator) crawler_config.override_navigator = options.override_navigator;
if (options.magic) crawler_config.magic = options.magic;
// Virtual scroll
if (options.virtual_scroll_config) crawler_config.virtual_scroll_config = options.virtual_scroll_config;
// Cache control
if (options.cache_mode) crawler_config.cache_mode = options.cache_mode;
// Other
if (options.log_console) crawler_config.log_console = options.log_console;
if (options.capture_mhtml) crawler_config.capture_mhtml = options.capture_mhtml;
// New parameters from 0.7.3/0.7.4
Iif (options.delay_before_return_html) crawler_config.delay_before_return_html = options.delay_before_return_html;
Iif (options.css_selector) crawler_config.css_selector = options.css_selector;
Iif (options.include_links !== undefined) crawler_config.include_links = options.include_links;
Iif (options.resolve_absolute_urls !== undefined)
crawler_config.resolve_absolute_urls = options.resolve_absolute_urls;
// Call service with proper configuration
const crawlConfig: AdvancedCrawlConfig = {
url: options.url ? String(options.url) : undefined,
crawler_config,
};
// Add extraction strategy passthrough objects if provided
Iif (options.extraction_strategy)
crawlConfig.extraction_strategy = options.extraction_strategy as ExtractionStrategy;
Iif (options.table_extraction_strategy)
crawlConfig.table_extraction_strategy = options.table_extraction_strategy as TableExtractionStrategy;
Iif (options.markdown_generator_options)
crawlConfig.markdown_generator_options = options.markdown_generator_options as MarkdownGeneratorOptions;
// Only include browser_config if we're not using a session
if (!options.session_id) {
crawlConfig.browser_config = browser_config;
}
const response: CrawlEndpointResponse = await this.service.crawl(crawlConfig);
// Validate response structure
if (!response || !response.results || response.results.length === 0) {
throw new Error('Invalid response from server: no results received');
}
const result: CrawlResultItem = response.results[0];
// Build response content
const content = [];
// Main content - use markdown.raw_markdown as primary content
let mainContent = 'No content extracted';
if (result.extracted_content) {
// Handle extraction results which might be objects or strings
if (typeof result.extracted_content === 'string') {
mainContent = result.extracted_content;
} else if (typeof result.extracted_content === 'object') {
mainContent = JSON.stringify(result.extracted_content, null, 2);
}
} else if (result.markdown?.raw_markdown) {
mainContent = result.markdown.raw_markdown;
} else if (result.html) {
mainContent = result.html;
} else if (result.fit_html) {
mainContent = result.fit_html;
}
content.push({
type: 'text',
text: mainContent,
});
// Screenshot if available
if (result.screenshot) {
// Save to local directory if requested
let savedFilePath: string | undefined;
if (options.screenshot_directory && typeof options.screenshot_directory === 'string') {
try {
// Resolve home directory path
let screenshotDir = options.screenshot_directory;
Iif (screenshotDir.startsWith('~')) {
const homedir = os.homedir();
screenshotDir = path.join(homedir, screenshotDir.slice(1));
}
// Check if user provided a file path instead of directory
Iif (screenshotDir.endsWith('.png') || screenshotDir.endsWith('.jpg')) {
console.warn(
`Warning: screenshot_directory should be a directory path, not a file path. Using parent directory.`,
);
screenshotDir = path.dirname(screenshotDir);
}
// Ensure directory exists
await fs.mkdir(screenshotDir, { recursive: true });
// Generate filename from URL and timestamp
const url = new URL(String(options.url));
const hostname = url.hostname.replace(/[^a-z0-9]/gi, '-');
const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, -5);
const filename = `${hostname}-${timestamp}.png`;
savedFilePath = path.join(screenshotDir, filename);
// Convert base64 to buffer and save
const buffer = Buffer.from(result.screenshot, 'base64');
await fs.writeFile(savedFilePath, buffer);
} catch (saveError) {
// Log error but don't fail the operation
console.error('Failed to save screenshot locally:', saveError);
}
}
// If saved locally and screenshot is large (>800KB), don't return the base64 data
const screenshotSize = Buffer.from(result.screenshot, 'base64').length;
const shouldReturnImage = !savedFilePath || screenshotSize < 800 * 1024; // 800KB threshold
if (shouldReturnImage) {
content.push({
type: 'image',
data: result.screenshot,
mimeType: 'image/png',
});
}
if (savedFilePath) {
const sizeInfo = !shouldReturnImage
? ` (${Math.round(screenshotSize / 1024)}KB - too large to display inline)`
: '';
content.push({
type: 'text',
text: `\n---\nScreenshot saved to: ${savedFilePath}${sizeInfo}`,
});
}
}
// PDF if available
if (result.pdf) {
content.push({
type: 'resource',
resource: {
uri: `data:application/pdf;name=${encodeURIComponent(new URL(String(options.url)).hostname)}.pdf;base64,${result.pdf}`,
mimeType: 'application/pdf',
blob: result.pdf,
},
});
}
// Metadata
if (result.metadata) {
content.push({
type: 'text',
text: `\n---\nMetadata: ${JSON.stringify(result.metadata, null, 2)}`,
});
}
// Links
if (result.links && (result.links.internal.length > 0 || result.links.external.length > 0)) {
content.push({
type: 'text',
text: `\n---\nLinks: Internal: ${result.links.internal.length}, External: ${result.links.external.length}`,
});
}
// JS execution results if available
if (result.js_execution_result && result.js_execution_result.results.length > 0) {
const jsResults = result.js_execution_result.results
.map((res: unknown, idx: number) => {
return `Result ${idx + 1}: ${JSON.stringify(res, null, 2)}`;
})
.join('\n');
content.push({
type: 'text',
text: `\n---\nJavaScript Execution Results:\n${jsResults}`,
});
}
// Add memory metrics if available
if (response.server_memory_delta_mb !== undefined || response.server_peak_memory_mb !== undefined) {
const memoryInfo = [];
if (response.server_processing_time_s !== undefined) {
memoryInfo.push(`Processing time: ${response.server_processing_time_s.toFixed(2)}s`);
}
if (response.server_memory_delta_mb !== undefined) {
memoryInfo.push(`Memory delta: ${response.server_memory_delta_mb.toFixed(1)}MB`);
}
if (response.server_peak_memory_mb !== undefined) {
memoryInfo.push(`Peak memory: ${response.server_peak_memory_mb.toFixed(1)}MB`);
}
if (memoryInfo.length > 0) {
content.push({
type: 'text',
text: `\n---\nServer metrics: ${memoryInfo.join(', ')}`,
});
}
}
return { content };
} catch (error) {
throw this.formatError(error, 'crawl');
}
}
}
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