search + regexp search

This commit is contained in:
mappu 2017-08-13 16:15:03 +12:00
parent 9a2a3aa12c
commit e117402a85
2 changed files with 92 additions and 9 deletions

View File

@ -1,11 +1,14 @@
package archive
import (
"bufio"
"fmt"
"html/template"
"io/ioutil"
"math"
"net/http"
"os"
"regexp"
"strings"
)
@ -40,11 +43,6 @@ func (this *ArchiveState) selectSource(log *LogSource, slug string) {
// - Mandatory: log, ym
// - Optional: page
func (this *ArchiveState) renderView(w http.ResponseWriter) {
if this.log == nil {
this.renderError(w, "Invalid log source selected")
return
}
fname, err := this.svr.LogFile(this.log, this.ym)
if err != nil {
this.renderError(w, err.Error())
@ -81,6 +79,76 @@ func (this *ArchiveState) renderView(w http.ResponseWriter) {
this.renderTemplate(w, []byte(output))
}
// renderSearch renders the search results.
// - Mandatory: log, query, queryIsRegex
func (this *ArchiveState) renderSearch(w http.ResponseWriter) {
var matcher func(line string) bool
if this.queryIsRegex {
rx, err := regexp.Compile(`(?i)` + this.query)
if err != nil {
this.renderError(w, "Invalid regular expression "+this.query+" ("+err.Error()+")")
return
}
matcher = rx.MatchString
} else {
queryLower := strings.ToLower(this.query)
matcher = func(line string) bool {
return strings.Contains(strings.ToLower(line), queryLower)
}
}
this.renderTemplateHead(w)
totalResults := 0
w.Write([]byte(`<ul>`))
limit := this.log.LatestDate().Next() // one off the end
for ympair := this.log.EarliestDate(); !ympair.Equals(limit); ympair = ympair.Next() {
fname, err := this.svr.LogFile(this.log, ympair)
if err != nil {
continue // no log exists for this ym
}
fh, err := os.Open(fname)
if err != nil {
continue // can't open this log file
}
func() {
defer fh.Close()
scanner := bufio.NewScanner(fh)
for i := 0; scanner.Scan(); i += 1 {
if !matcher(scanner.Text()) {
continue
}
totalResults += 1
page := i / this.svr.cfg.LinesPerPage
lineNo := i % this.svr.cfg.LinesPerPage
url := fmt.Sprintf(`/%s/%d/%d/page-%d#line-%d`, this.logBestSlug, ympair.Year, ympair.Month, page, lineNo)
w.Write([]byte(`<li><a href="` + template.HTMLEscapeString(url) + `">&raquo;</a> ` + template.HTMLEscapeString(scanner.Text()) + `</li>`))
}
}()
}
w.Write([]byte(`</ul>`))
if totalResults == 0 {
w.Write([]byte(`No search results for &quot;<em>` + template.HTMLEscapeString(this.query) + `</em>&quot;`))
} else {
w.Write([]byte(`<br><em>Found ` + fmt.Sprintf("%d", totalResults) + ` total result(s).</em><br><br>`))
}
this.renderTemplateFoot(w)
}
// renderError renders a plain text string, escaping it for HTML use.
func (this *ArchiveState) renderError(w http.ResponseWriter, msg string) {
this.renderTemplate(w, []byte(template.HTMLEscapeString(msg)))
}

View File

@ -118,12 +118,27 @@ func (this *ArchiveServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
arc.renderError(w, fmt.Sprintf("Unknown source '%s'", matches[1]))
}
} else if this.rxSearch.MatchString(r.URL.Path) {
arc.renderError(w, "Not implemented.") // FIXME
} else if matches := this.rxSearch.FindStringSubmatch(r.URL.Path); len(matches) > 0 {
if ls := this.lookupSource(matches[1]); ls != nil {
arc.selectSource(ls, matches[1])
arc.query, _ = url.QueryUnescape(matches[2])
arc.queryIsRegex = false
arc.renderSearch(w)
} else if this.rxSearchRx.MatchString(r.URL.Path) {
arc.renderError(w, "Not implemented.") // FIXME
} else {
arc.renderError(w, fmt.Sprintf("Unknown source '%s'", matches[1]))
}
} else if matches := this.rxSearchRx.FindStringSubmatch(r.URL.Path); len(matches) > 0 {
if ls := this.lookupSource(matches[1]); ls != nil {
arc.selectSource(ls, matches[1])
arc.query, _ = url.QueryUnescape(matches[2])
arc.queryIsRegex = true
arc.renderSearch(w)
} else {
arc.renderError(w, fmt.Sprintf("Unknown source '%s'", matches[1]))
}
} else {
arc.renderError(w, "Unknown route.")