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Added options for performing case-insensitive matches and stripping HTML tags #8

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Added options for performing case-insensitive matches and stripping HTML tags #8

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35 changes: 27 additions & 8 deletions src/webwatch/ww.go
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Original file line number Diff line number Diff line change
Expand Up @@ -12,10 +12,14 @@ import (
"log"
"net/http"
"net/smtp"
"regexp"
"strings"
"time"
)

// This is sufficient for removing HTML tags from a document in most cases.
var stripHtml = regexp.MustCompile(`<[^>]*>`)

// Construct the message to send from the parameters. The message headers are
// written one-by-one followed by an empty line and the message body.
func buildMessage(url, warn, from, to string) string {
Expand Down Expand Up @@ -65,13 +69,15 @@ func fetchPage(url string) ([]byte, error) {

func main() {
var (
url = flag.String("url", "", "`URL` to check")
warn = flag.String("warn", "", "Send email if this `string` is found in the web page")
from = flag.String("from", "", "Email `address` to send from")
to = flag.String("to", "", "Comma-separated list of email `addresses` to send to")
smtpServer = flag.String("smtp", "gmail-smtp-in.l.google.com:25", "Address of SMTP `server` to use (host:port)")
username = flag.String("username", "", "`Username` for SMTP server")
password = flag.String("password", "", "`Password` for SMTP server")
url = flag.String("url", "", "`URL` to check")
warn = flag.String("warn", "", "Send email if this `string` is found in the web page")
from = flag.String("from", "", "Email `address` to send from")
to = flag.String("to", "", "Comma-separated list of email `addresses` to send to")
smtpServer = flag.String("smtp", "gmail-smtp-in.l.google.com:25", "Address of SMTP `server` to use (host:port)")
username = flag.String("username", "", "`Username` for SMTP server")
password = flag.String("password", "", "`Password` for SMTP server")
preserveHtml = flag.Bool("preserve-html", false, "don't strip HTML tags")
caseSensitive = flag.Bool("case-sensitive", false, "match string case")
)
flag.Parse()

Expand All @@ -86,8 +92,21 @@ func main() {
log.Fatalf("Failed to fetch %s: %s\n", *url, err)
}

content := string(b)

// Unless preserveHtml was set, strip HTML tags from the page
if !*preserveHtml {
content = stripHtml.ReplaceAllLiteralString(content, "")
}

// Unless caseSensitive was set, convert both the string and content to lowercase
if !*caseSensitive {
*warn = strings.ToLower(*warn)
content = strings.ToLower(content)
}

// Check for the search term
if strings.Contains(string(b), *warn) {
if strings.Contains(content, *warn) {

// Build the message
m := buildMessage(*url, *warn, *from, *to)
Expand Down