柯利找不到任何链接

Question

I've done a few programs like this before in basically the same fashion (just different domains), however this time, colly isn't finding a single link and just quits after visiting the first page. Can anyone see what's wrong? *NOTE: there are parts of the program I have omitted for clarity about the topic at hand.

*EDIT: I have found the problem but not a solution. Running curl https://trendmicro.com/vinfo/us/security/research-and-analysis/threat-reports returns a 301 permanently moved error in the terminal, but connecting to the same link in the browser gets the page I want. Why is THIS happening and how do I fix it?

*EDIT2: I have found that making the command curl -L makes curl follow redirects - which then spits out the webpage I need. However, how do I translate that to colly? Because colly is still picking up the 301 error.

import (
    "fmt"
    "strings"
    "github.com/gocolly/colly"
)

func main() {
    /* only navigate to links within these paths */
    tld1 := "/vinfo/us/security/research-and-analysis/threat-reports"

    c := colly.NewCollector(
        colly.AllowedDomains("trendmicro.com", "documents.trendmicro.com"),
    )

    c.OnHTML("a[href]", func(e *colly.HTMLElement) {
        link := e.Attr("href")
        fmt.Printf("Link found: %q -> %s
", e.Text, link)
        if strings.Contains(link, tld1) {
            c.Visit(e.Request.AbsoluteURL(link))
        }
    })

    c.OnRequest(func(r * colly.Request) {
        fmt.Println("Visiting", r.URL.String())
    })

    c.Visit("https://trendmicro.com/vinfo/us/security/research-and-analysis/threat-reports")
}

Answer 1

I have found the solution. I plugged my link https://trendmicro.com/vinfo/us/security/research-and-analysis/threat-reports into https://wheregoes.com/retracer.php to find where the 301 redirects to, only to find out it prepends a www. to the beginning of the link. Adding the www. to the beginning of the initial c.Visit string and to the c.AllowedDomains sections worked like a charm