mirror of
https://github.com/tnypxl/rollup.git
synced 2025-12-16 07:23:17 +00:00
feat: implement site-based scraping with path overrides
This commit is contained in:
Arik Jones (aider)
@@ -15,17 +15,27 @@ type Config struct {
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}
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type ScrapeConfig struct {
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URLs []URLConfig `yaml:"urls"`
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OutputType string `yaml:"output_type"`
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RequestsPerSecond float64 `yaml:"requests_per_second"`
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BurstLimit int `yaml:"burst_limit"`
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Sites []SiteConfig `yaml:"sites"`
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OutputType string `yaml:"output_type"`
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RequestsPerSecond float64 `yaml:"requests_per_second"`
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BurstLimit int `yaml:"burst_limit"`
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}
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type URLConfig struct {
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URL string `yaml:"url"`
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CSSLocator string `yaml:"css_locator"`
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ExcludeSelectors []string `yaml:"exclude_selectors"`
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OutputAlias string `yaml:"output_alias"`
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type SiteConfig struct {
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BaseURL string `yaml:"base_url"`
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CSSLocator string `yaml:"css_locator"`
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ExcludeSelectors []string `yaml:"exclude_selectors"`
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MaxDepth int `yaml:"max_depth"`
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AllowedPaths []string `yaml:"allowed_paths"`
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ExcludePaths []string `yaml:"exclude_paths"`
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OutputAlias string `yaml:"output_alias"`
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PathOverrides []PathOverride `yaml:"path_overrides"`
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}
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type PathOverride struct {
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Path string `yaml:"path"`
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CSSLocator string `yaml:"css_locator"`
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ExcludeSelectors []string `yaml:"exclude_selectors"`
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}
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func Load(configPath string) (*Config, error) {
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@@ -38,85 +38,148 @@ type ScrapeConfig struct {
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BurstLimit int
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}
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// ScrapeMultipleURLs scrapes multiple URLs concurrently
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func ScrapeMultipleURLs(config Config) (map[string]string, error) {
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results := make(chan struct {
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url string
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content string
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err error
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}, len(config.URLs))
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func ScrapeSites(config Config) (map[string]string, error) {
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results := make(chan struct {
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url string
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content string
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err error
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})
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// Use default values if not specified in the config
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requestsPerSecond := 0.5 // Default to 1 request every 2 seconds
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if config.Scrape.RequestsPerSecond > 0 {
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requestsPerSecond = config.Scrape.RequestsPerSecond
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}
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limiter := rate.NewLimiter(rate.Limit(config.Scrape.RequestsPerSecond), config.Scrape.BurstLimit)
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burstLimit := 1 // Default to 1
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if config.Scrape.BurstLimit > 0 {
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burstLimit = config.Scrape.BurstLimit
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}
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var wg sync.WaitGroup
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for _, site := range config.Sites {
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wg.Add(1)
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go func(site SiteConfig) {
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defer wg.Done()
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scrapeSite(site, config, results, limiter)
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}(site)
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}
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// Create a rate limiter based on the configuration
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limiter := rate.NewLimiter(rate.Limit(requestsPerSecond), burstLimit)
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go func() {
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wg.Wait()
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close(results)
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}()
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var wg sync.WaitGroup
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for _, urlConfig := range config.URLs {
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wg.Add(1)
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go func(cfg URLConfig) {
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defer wg.Done()
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// Wait for rate limiter before making the request
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err := limiter.Wait(context.Background())
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if err != nil {
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results <- struct {
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url string
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content string
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err error
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}{cfg.URL, "", fmt.Errorf("rate limiter error: %v", err)}
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return
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}
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scrapedContent := make(map[string]string)
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for result := range results {
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if result.err != nil {
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logger.Printf("Error scraping %s: %v\n", result.url, result.err)
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continue
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}
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scrapedContent[result.url] = result.content
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}
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content, err := scrapeURL(cfg)
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results <- struct {
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url string
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content string
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err error
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}{cfg.URL, content, err}
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}(urlConfig)
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}
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go func() {
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wg.Wait()
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close(results)
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}()
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scrapedContent := make(map[string]string)
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for result := range results {
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if result.err != nil {
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logger.Printf("Error scraping %s: %v\n", result.url, result.err)
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continue
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}
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scrapedContent[result.url] = result.content
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}
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return scrapedContent, nil
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return scrapedContent, nil
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}
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func scrapeURL(config URLConfig) (string, error) {
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content, err := FetchWebpageContent(config.URL)
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if err != nil {
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return "", err
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}
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func scrapeSite(site SiteConfig, config Config, results chan<- struct {
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url string
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content string
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err error
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}, limiter *rate.Limiter) {
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visited := make(map[string]bool)
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queue := []string{site.BaseURL}
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if config.CSSLocator != "" {
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content, err = ExtractContentWithCSS(content, config.CSSLocator, config.ExcludeSelectors)
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if err != nil {
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return "", err
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}
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}
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for len(queue) > 0 {
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url := queue[0]
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queue = queue[1:]
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return ProcessHTMLContent(content, Config{})
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if visited[url] {
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continue
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}
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visited[url] = true
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if !isAllowedURL(url, site) {
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continue
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}
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// Wait for rate limiter before making the request
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err := limiter.Wait(context.Background())
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if err != nil {
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results <- struct {
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url string
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content string
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err error
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}{url, "", fmt.Errorf("rate limiter error: %v", err)}
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continue
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}
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cssLocator, excludeSelectors := getOverrides(url, site)
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content, err := scrapeURL(url, cssLocator, excludeSelectors)
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results <- struct {
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url string
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content string
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err error
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}{url, content, err}
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if len(visited) < site.MaxDepth {
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links, _ := ExtractLinks(url)
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for _, link := range links {
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if !visited[link] && isAllowedURL(link, site) {
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queue = append(queue, link)
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}
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}
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}
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}
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}
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func isAllowedURL(url string, site SiteConfig) bool {
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parsedURL, err := url.Parse(url)
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if err != nil {
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return false
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}
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baseURL, _ := url.Parse(site.BaseURL)
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if parsedURL.Host != baseURL.Host {
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return false
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}
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path := parsedURL.Path
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for _, allowedPath := range site.AllowedPaths {
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if strings.HasPrefix(path, allowedPath) {
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for _, excludePath := range site.ExcludePaths {
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if strings.HasPrefix(path, excludePath) {
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return false
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}
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}
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return true
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}
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}
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return false
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}
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func getOverrides(url string, site SiteConfig) (string, []string) {
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parsedURL, _ := url.Parse(url)
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path := parsedURL.Path
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for _, override := range site.PathOverrides {
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if strings.HasPrefix(path, override.Path) {
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if override.CSSLocator != "" {
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return override.CSSLocator, override.ExcludeSelectors
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}
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return site.CSSLocator, override.ExcludeSelectors
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}
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}
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return site.CSSLocator, site.ExcludeSelectors
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}
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func scrapeURL(url, cssLocator string, excludeSelectors []string) (string, error) {
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content, err := FetchWebpageContent(url)
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if err != nil {
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return "", err
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}
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if cssLocator != "" {
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content, err = ExtractContentWithCSS(content, cssLocator, excludeSelectors)
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if err != nil {
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return "", err
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}
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}
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return ProcessHTMLContent(content, Config{})
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}
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func getFilenameFromContent(content, url string) string {
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