func Show(w http.ResponseWriter, r *http.Request) {
query := r.URL
filename := query.Query().Get("file")
line64, err := strconv.ParseInt(query.Query().Get("line"), 10, 0)
if err != nil {
log.Printf("%v\n", err)
return
}
line := int(line64)
log.Printf("Showing file %s, line %d\n", filename, line)
if *common.UseSourcesDebianNet && health.IsHealthy("sources.debian.net") {
destination := fmt.Sprintf("http://sources.debian.net/src/%s?hl=%d#L%d",
strings.Replace(filename, "_", "/", 1), line, line)
log.Printf("SDN is healthy. Redirecting to %s\n", destination)
http.Redirect(w, r, destination, 302)
return
}
idx := strings.Index(filename, "/")
if idx == -1 {
http.Error(w, "Filename does not contain a package", http.StatusInternalServerError)
return
}
pkg := filename[:idx]
shard := common.SourceBackendStubs[shardmapping.TaskIdxForPackage(pkg, len(common.SourceBackendStubs))]
resp, err := shard.File(context.Background(), &proto.FileRequest{
Path: filename,
})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// NB: contents is untrusted as it can contain the contents of any file
// within any Debian package. Converting it to string is not a problem,
// though, see http://golang.org/ref/spec#Conversions, "Conversions to and
// from a string type": "Converting a slice of bytes to a string type
// yields a string whose successive bytes are the elements of the slice.".
// We don’t iterate over this string, we just pass it directly to the
// user’s browser, which can then deal with the bytes :-).
lines := strings.Split(string(resp.Contents), "\n")
highestLineNr := fmt.Sprintf("%d", len(lines))
// Since Go templates don’t offer any way to use {{$idx+1}}, we need to
// pre-calculate line numbers starting from 1 here.
lineNumbers := make([]int, len(lines))
for idx, _ := range lines {
lineNumbers[idx] = idx + 1
}
err = common.Templates.ExecuteTemplate(w, "show.html", map[string]interface{}{
"line": line,
"lines": lines,
"numbers": lineNumbers,
"lnrwidth": len(highestLineNr),
"filename": filename,
})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func Show(w http.ResponseWriter, r *http.Request) {
query := r.URL
filename := query.Query().Get("file")
line64, err := strconv.ParseInt(query.Query().Get("line"), 10, 0)
if err != nil {
log.Printf("%v\n", err)
return
}
line := int(line64)
log.Printf("Showing file %s, line %d\n", filename, line)
if *common.UseSourcesDebianNet && health.IsHealthy("sources.debian.net") {
destination := fmt.Sprintf("http://sources.debian.net/src/%s?hl=%d#L%d",
strings.Replace(filename, "_", "/", 1), line, line)
log.Printf("SDN is healthy. Redirecting to %s\n", destination)
http.Redirect(w, r, destination, 302)
return
}
queryCopy := query
queryCopy.Scheme = "http"
queryCopy.Host = *common.SourceBackends
queryCopy.Path = "/file"
log.Printf("Asking source backend: %s\n", queryCopy.String())
resp, err := http.Get(queryCopy.String())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer resp.Body.Close()
contents, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Printf("%v\n", err)
return
}
if resp.StatusCode != 200 {
// relay the source backend error
http.Error(w, string(contents), resp.StatusCode)
return
}
// NB: contents is untrusted as it can contain the contents of any file
// within any Debian package. Converting it to string is not a problem,
// though, see http://golang.org/ref/spec#Conversions, "Conversions to and
// from a string type": "Converting a slice of bytes to a string type
// yields a string whose successive bytes are the elements of the slice.".
// We don’t iterate over this string, we just pass it directly to the
// user’s browser, which can then deal with the bytes :-).
lines := strings.Split(string(contents), "\n")
highestLineNr := fmt.Sprintf("%d", len(lines))
// Since Go templates don’t offer any way to use {{$idx+1}}, we need to
// pre-calculate line numbers starting from 1 here.
lineNumbers := make([]int, len(lines))
for idx, _ := range lines {
lineNumbers[idx] = idx + 1
}
err = common.Templates.ExecuteTemplate(w, "show.html", map[string]interface{}{
"line": line,
"lines": lines,
"numbers": lineNumbers,
"lnrwidth": len(highestLineNr),
"filename": filename,
})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}