scrape some content from blog post URLs

newsletter/go.mod

@@ -0,0 +1,13 @@
+module bopbot/newsletter
+
+go 1.21.3
+
+require (
+	github.com/PuerkitoBio/goquery v1.8.1
+	github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4
+)
+
+require (
+	github.com/andybalholm/cascadia v1.3.1 // indirect
+	golang.org/x/net v0.7.0 // indirect
+)

newsletter/go.sum

@@ -0,0 +1,37 @@
+github.com/PuerkitoBio/goquery v1.8.1 h1:uQxhNlArOIdbrH1tr0UXwdVFgDcZDrZVdcpygAcwmWM=
+github.com/PuerkitoBio/goquery v1.8.1/go.mod h1:Q8ICL1kNUJ2sXGoAhPGUdYDJvgQgHzJsnnd3H7Ho5jQ=
+github.com/andybalholm/cascadia v1.3.1 h1:nhxRkql1kdYCc8Snf7D5/D3spOX+dBgjA6u8x004T2c=
+github.com/andybalholm/cascadia v1.3.1/go.mod h1:R4bJ1UQfqADjvDa4P6HZHLh/3OxWWEqc0Sk8XGwHqvA=
+github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4 h1:0sw0nJM544SpsihWx1bkXdYLQDlzRflMgFJQ4Yih9ts=
+github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4/go.mod h1:+ccdNT0xMY1dtc5XBxumbYfOUhmduiGudqaDgD2rVRE=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210916014120-12bc252f5db8/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
+golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

newsletter/scrape/.gitignore

@@ -0,0 +1 @@
+scrape

newsletter/scrape/Makefile

@@ -0,0 +1,4 @@
+all:
+	go get ./...
+	go build -o scrape .
+	./scrape

newsletter/scrape/main.go

@@ -0,0 +1,134 @@
+package main
+
+import (
+  "fmt"
+  "log"
+  "net/http"
+  "net/url"
+  "strings"
+
+  "github.com/PuerkitoBio/goquery"
+  "github.com/yosssi/gohtml"
+)
+
+var DEBUG bool = false
+
+func GrabPage(url string) *goquery.Document {
+  // Request the HTML page.
+  res, err := http.Get(url)
+  if err != nil {
+    log.Fatal(err)
+  }
+  defer res.Body.Close()
+  if res.StatusCode != 200 {
+    log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
+  }
+
+  // Load the HTML document
+  doc, err := goquery.NewDocumentFromReader(res.Body)
+  if err != nil {
+    log.Fatal(err)
+  }
+
+  if DEBUG {
+    //print out the page
+    fmt.Printf(">>>status code: %d\n", res.StatusCode)
+    pageHtml, err := doc.Html()
+    if err != nil {
+      log.Fatal(err)
+    }
+    fmt.Printf(">>>page html: %s\n", gohtml.Format(pageHtml))
+  }
+
+  return doc
+}
+
+func GrabPostTitleFromPage(doc *goquery.Document, titleSelector string) string {
+  blogTitle := doc.Find(titleSelector).Text()
+  if DEBUG {
+    fmt.Printf(">>>post title: %s\n", blogTitle)
+  }
+
+  return blogTitle
+}
+
+// return the root url domain from provided postUrl
+func GetRootUrl(postUrl string) string {
+  url, err := url.Parse(postUrl)
+  if err != nil {
+    log.Fatal(err)
+  }
+  url.Path = "/"
+
+  if DEBUG {
+    fmt.Printf(">>>root url: %s\n", url.String())
+  }
+
+  return url.String()
+}
+
+// replace root src and hrefs with FQDN refs
+func ReplaceRootRefs(html string, postUrl string) string {
+  rootReplacementUrl := GetRootUrl(postUrl)
+  html = strings.Replace(html, "=\"/", "=\"" + rootReplacementUrl, -1)
+
+  return html
+}
+
+func GrabPostFromPage(doc *goquery.Document, postUrl string, postSelector string) string {
+  // grab post html content
+  blogContent, err := doc.Find(postSelector).Html()
+  if err != nil {
+    log.Fatal(err)
+  }
+
+  // replace `/` resource refs with FQDN
+  blogContent = ReplaceRootRefs(blogContent, postUrl)
+
+  if DEBUG {
+    fmt.Printf(">>>blog post: %s\n", gohtml.Format(blogContent))
+  }
+
+  return blogContent
+}
+
+func ScrapePost(postUrl string, titleSelector string, postSelector string) (string, string) {
+  doc := GrabPage(postUrl)
+
+  title := GrabPostTitleFromPage(doc, titleSelector)
+  postHtml := GrabPostFromPage(doc, postUrl, postSelector)
+  return title, postHtml
+}
+
+func main() {
+  // where can we find the post title and content?
+  titleSelector := "div#content div.container h2"
+  postSelector := "div#content div.container"
+
+
+  // // example usage
+  // postUrl := "https://blog.ruebenramirez.com/posts/2023-10-06-gear-update/"
+  // title, postHtml := ScrapePost(postUrl, titleSelector, postSelector)
+  // fmt.Printf(">>>blog post title: %s\n", gohtml.Format(title))
+  // fmt.Printf(">>>blog post html: %s\n", gohtml.Format(postHtml))
+
+  // example usage
+  // postUrl := "https://blog.ruebenramirez.com/posts/2023-10-21-round-2-with-covid/"
+  // title, postHtml := ScrapePost(postUrl, titleSelector, postSelector)
+  // fmt.Printf(">>>blog post title: %s\n", gohtml.Format(title))
+  // fmt.Printf(">>>blog post html: %s\n", gohtml.Format(postHtml))
+
+  // example usage
+  postUrl := "https://blog.ruebenramirez.com/posts/2023-11-05-celebratin-60-pounds-down/"
+  title, postHtml := ScrapePost(postUrl, titleSelector, postSelector)
+  fmt.Printf(">>>blog post title: %s\n", gohtml.Format(title))
+  fmt.Printf(">>>blog post html: %s\n", gohtml.Format(postHtml))
+
+  // example usage
+  // postUrl := "https://blog.ruebenramirez.com/posts/2023-10-30-good-news-from-biopsy/"
+  // title, postHtml := ScrapePost(postUrl, titleSelector, postSelector)
+  // fmt.Printf(">>>blog post title: %s\n", gohtml.Format(title))
+  // fmt.Printf(">>>blog post html: %s\n", gohtml.Format(postHtml))
+}
+
+