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don't crawl files that haven't been modified since the last crawl #17

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don't crawl files that haven't been modified since the last crawl #17

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7 changes: 6 additions & 1 deletion main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,12 @@ func (c *Crawler) Crawl(u *url.URL, root *url.URL, lastmod string) {
r.Lastmod = lm.Format(SitemapTimeFormat)
ct := res.Header.Get("Content-Type")
var dontCrawl bool
if strings.HasPrefix(ct, "text/html") {
if res.StatusCode == http.StatusNotModified {
if *verbose {
log.Println("Not crawling", s, "(304 not modified)")
}
dontCrawl = true
} else if strings.HasPrefix(ct, "text/html") {
// Proceed
} else if strings.HasPrefix(ct, "text/xml") {
// TODO: Read sitemaps
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