Looks like it's pretty much working!
Yeah, I'm pretty awesome.
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parent
9afaeee97d
commit
14d105740a
129
fullscrape.go
129
fullscrape.go
@ -9,36 +9,56 @@ import (
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"os"
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"strconv"
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"strings"
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"time"
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)
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const PROGRAM_NAME = "fullscrape"
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func main() {
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if len(os.Args) <= 3 {
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fmt.Print("Usage: " + PROGRAM_NAME + " <url> <output-directory> <depth> [-nx]\n")
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fmt.Print(" -n: Don't rewrite urls in source files to work locally\n")
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fmt.Print(" -x: Cross domains when following links\n")
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os.Exit(1)
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}
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fix_urls := true
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cross_domains := false
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req_url := os.Args[1] //"http://golang.org/"
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out_dir := os.Args[2]
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req_depth, err := strconv.Atoi(os.Args[3]) //4
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if err != nil {
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fmt.Print("Invalid Depth specified. Please give a number.\n")
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fmt.Print("Usage: " + PROGRAM_NAME + " <url> <output-directory> <depth> [-n]\n")
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os.Exit(1)
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}
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depthFlag := -1
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norewriteFlag := false
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crossdomainFlag := false
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throttleFlag := 1000
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var err error
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if len(os.Args) > 3 {
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tst_arg := os.Args[4]
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if strings.Index(tst_arg, "n") != -1 {
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fix_urls = false
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} else if strings.Index(tst_arg, "x") != -1 {
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cross_domains = true
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tst := os.Args[3]
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depthArg := strings.IndexRune(tst, 'd')
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if depthArg >= 0 {
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// The actual depth value should either be depthArg+1
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// or, if that is '=', depthArg+2
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if tst[depthArg+1] == '=' {
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depthFlag, err = strconv.Atoi(strings.Split(tst, "")[depthArg+2])
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} else {
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depthFlag, err = strconv.Atoi(strings.Split(tst, "")[depthArg+1])
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}
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if err != nil {
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fmt.Printf("Invalid depth given (must be an integer): %s\n", depthFlag)
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os.Exit(1)
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}
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}
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norewriteFlag = (strings.IndexRune(tst, 'n') >= 0)
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crossdomainFlag = (strings.IndexRune(tst, 'x') >= 0)
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throttleArg := strings.IndexRune(tst, 't')
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if throttleArg >= 0 {
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// The actual throttle value should either be throttleArg+1...
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// or, if that is '=', throttleArg+2...
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if tst[depthArg+1] == '=' {
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// The throttle argument MUST have a space after it
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throttleFlag, err = strconv.Atoi(strings.Split(tst, "")[throttleArg+2])
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} else {
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throttleFlag, err = strconv.Atoi(strings.Split(tst, "")[throttleArg+1])
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}
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if err != nil {
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fmt.Printf("Invalid depth given (must be milliseconds as an integer): %s\n", depthFlag)
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os.Exit(1)
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}
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}
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}
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if err = CreateDirIfNotExist(out_dir); err != nil {
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if err := CreateDirIfNotExist(out_dir); err != nil {
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fmt.Print("Unable to create initial directory %s\n", out_dir)
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fmt.Print("Error: %s\n", err)
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os.Exit(1)
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@ -54,10 +74,12 @@ func main() {
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}
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c.rootUrl = req_url
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c.outDir = out_dir
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c.fixUrls = fix_urls
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c.xDomain = cross_domains
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c.fixUrls = norewriteFlag
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c.xDomain = crossdomainFlag
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c.depth = depthFlag
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c.throttle = time.Duration(throttleFlag)
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c.Crawl(req_url, req_depth)
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c.Crawl()
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}
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type unprocessed struct {
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@ -66,28 +88,48 @@ type unprocessed struct {
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}
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type Crawler struct {
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rootUrl string
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outDir string
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fixUrls bool
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xDomain bool
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rootUrl string
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outDir string
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fixUrls bool
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xDomain bool
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depth int
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throttle time.Duration
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}
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func (c *Crawler) Crawl(url string, depth int) {
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func (c *Crawler) Crawl() {
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if c.depth >= 0 {
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fmt.Printf("Processing %s with depth %d (Norewrite: %t, XDomain: %t, Throttle: %d)\n", c.rootUrl, c.depth, c.fixUrls, c.xDomain, c.throttle)
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} else {
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fmt.Printf("Processing %s (Norewrite: %t, XDomain: %t, Throttle: %d)\n", c.rootUrl, c.fixUrls, c.xDomain, c.throttle)
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}
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// Setup channel for inputs to be processed
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up := make(chan unprocessed, 0)
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// Kick off processing and count how many pages are left to process
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go c.getPage(url, depth, up)
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go c.getPage(c.rootUrl, c.depth, up)
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outstanding := 1
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visited := make(map[string]bool)
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status := fmt.Sprintf("Files %d/%d", len(visited), outstanding+len(visited))
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for outstanding > 0 {
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done := len(visited) - outstanding
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if done < 0 {
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done = 0
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}
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fmt.Print(strings.Repeat("", len(status)))
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status = fmt.Sprintf("Files %d/%d", done, len(visited))
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fmt.Print(status)
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if c.throttle > 0 {
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time.Sleep(time.Millisecond * c.throttle)
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}
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// Pop a visit from the channel
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next := <-up
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outstanding--
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// If we're too deep, skip it
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if next.depth <= 0 {
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if next.depth == 0 {
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continue
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}
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@ -101,20 +143,23 @@ func (c *Crawler) Crawl(url string, depth int) {
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// All good to visit them
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outstanding++
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visited[link] = true
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go c.getPage(link, depth, up)
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go c.getPage(link, next.depth, up)
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}
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}
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fmt.Print(strings.Repeat("", len(status)))
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status = fmt.Sprintf("Files %d/%d", len(visited), len(visited))
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fmt.Printf("%s\n", status)
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}
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func (c *Crawler) getPage(url string, depth int, r chan unprocessed) {
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_, urls, err := c.Fetch(url)
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//body, urls, err := c.Fetch(url)
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fmt.Printf("Found: %s\n", url)
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//fmt.Printf("Found: %s\n", url)
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if err != nil {
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fmt.Println(err)
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}
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fmt.Printf("Pulled URLS: %s\n", urls)
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//fmt.Printf("Pulled URLS: %s\n", urls)
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r <- unprocessed{depth - 1, urls}
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}
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@ -123,7 +168,7 @@ func (c *Crawler) Fetch(url string) (string, []string, error) {
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urls := make([]string, 0)
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// Ok, go get URL
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response, err := http.Get(url)
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if err != nil {
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if err != nil || response.StatusCode != 200 {
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return "", nil, err
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}
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body, err := ioutil.ReadAll(response.Body)
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@ -165,9 +210,9 @@ func (c *Crawler) Fetch(url string) (string, []string, error) {
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for {
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tt := z.Next()
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switch {
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case tt == html.StartTagToken:
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case tt == html.StartTagToken || tt == html.SelfClosingTagToken:
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t := z.Token()
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if t.Data == "a" || t.Data == "link" {
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if t.Data == "link" || t.Data == "a" {
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for _, a := range t.Attr {
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if a.Key == "href" {
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if c.CheckUrl(a.Val) {
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@ -176,7 +221,7 @@ func (c *Crawler) Fetch(url string) (string, []string, error) {
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break
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}
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}
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} else if t.Data == "img" {
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} else if t.Data == "img" || t.Data == "script" {
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for _, a := range t.Attr {
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if a.Key == "src" {
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if c.CheckUrl(a.Val) {
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@ -203,6 +248,14 @@ func (c *Crawler) Fetch(url string) (string, []string, error) {
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* The main purpose is for cross-domain checks
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*/
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func (c *Crawler) CheckUrl(url string) bool {
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// Ignore anchor urls
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if strings.IndexRune(url, '#') >= 0 {
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return false
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}
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// Ignore "mailto" links
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if strings.HasPrefix(url, "mailto:") {
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return false
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}
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if !c.xDomain {
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if strings.HasPrefix(url, "http") {
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return strings.HasPrefix(url, c.rootUrl)
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@ -234,6 +287,6 @@ func CreateDirIfNotExist(dir string) error {
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func WriteFile(d string, filename string) error {
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do := []byte(d)
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fmt.Printf("Writing %s\n", filename)
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//fmt.Printf("Writing %s\n", filename)
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return ioutil.WriteFile(filename, do, 0664)
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}
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