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wos.go
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wos.go
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package spectrum
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"path"
"regexp"
"strings"
)
var (
fileSuffixes = []string{".tap.zip", ".sna.zip", ".z80.zip"}
baseURL = "http://www.worldofspectrum.org/"
queryBaseURL = baseURL + "infoseek.cgi?"
)
func knownType(filename string) bool {
for _, suffix := range fileSuffixes {
if strings.HasSuffix(filename, suffix) {
return true
}
}
return false
}
// Information about a game/demo/utility located at [www.worldofspectrum.org]
type WosRecord struct {
Title string
MachineType string // "ZX Spectrum 48K", "ZX Spectrum 48K/128K", ...
Publication string // "Freeware", "Commercial", "unknown", ...
FtpFiles []string // formerly ftp, now http://www.worldofspectrum.org/...
Score string // "7.59 (24 votes)", "No votes yet"
}
// Query [www.worldofspectrum.org] for matching files
func WosQuery(app *Application, query string) ([]WosRecord, error) {
client := new(http.Client)
query = queryBaseURL + query
if app.Verbose {
app.PrintfMsg("WOS query: %s", query)
app.PrintfMsg("Fetching...")
}
response, err := client.Get(query)
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(response.Body)
response.Body.Close()
if err != nil {
return nil, err
}
if app.Verbose {
app.PrintfMsg("Response status: %s", response.Status)
}
var matches []WosRecord
{
regexp_title := regexp.MustCompile(">Full title<")
regexp1 := regexp.MustCompile("<A[^>]*>" + "([^<]+)" + "</A>")
regexp2 := regexp.MustCompile("<FONT[^>]*>(<I>)?" + "([^<]+)")
regexp_score := regexp.MustCompile(("<FONT[^>]*>" + "([^<]+)" + "<" + "[^<]+") + ("<I[^>]*>" + "([^<]+)" + "</I>"))
regexp_file := regexp.MustCompile("/pub/sinclair/[a-zA-Z0-9\\-\\/\\.\\?_]+")
var a [][]int = regexp_title.FindAllIndex(body, -1)
for i := 0; i < len(a); i++ {
var startIndex, endIndex int
startIndex = a[i][0]
if i+1 < len(a) {
endIndex = a[i+1][0]
} else {
endIndex = len(body)
}
body2 := body[startIndex:endIndex]
// Full title
var title string
{
title = ""
var b2 []int = regexp1.FindSubmatchIndex(body2)
if 3 < len(b2) {
startIndex3 := b2[2]
endIndex3 := b2[3]
title = string(body2[startIndex3:endIndex3])
title = strings.TrimSpace(title)
}
}
// Machine type
var machineType string
{
machineType = "unknown"
startIndex2 := strings.Index(string(body2), ">Machine type<")
if startIndex2 != -1 {
var b2 []int = regexp2.FindSubmatchIndex(body2[startIndex2:])
if 5 < len(b2) {
startIndex3 := b2[4]
endIndex3 := b2[5]
machineType = string(body2[startIndex2:][startIndex3:endIndex3])
machineType = strings.TrimSpace(machineType)
}
}
}
// Publication (freeware, commercial, unknown, ...)
var publication string
{
publication = "unknown"
startIndex2 := strings.Index(string(body2), ">Original publication<")
if startIndex2 != -1 {
var b2 []int = regexp2.FindSubmatchIndex(body2[startIndex2:])
if 5 < len(b2) {
startIndex3 := b2[4]
endIndex3 := b2[5]
publication = string(body2[startIndex2:][startIndex3:endIndex3])
publication = strings.TrimSpace(publication)
}
}
}
// Score
var score string
{
score = ""
startIndex2 := strings.Index(string(body2), ">Score<")
if startIndex2 != -1 {
var b2 []int = regexp_score.FindSubmatchIndex(body2[startIndex2:])
if 5 < len(b2) {
startIndex3 := b2[2]
endIndex3 := b2[3]
startIndex4 := b2[4]
endIndex4 := b2[5]
// 'score1' is the score, 'score2' is the rate of confidence
score1 := string(body2[startIndex2:][startIndex3:endIndex3])
score2 := string(body2[startIndex2:][startIndex4:endIndex4])
score1 = strings.TrimSpace(score1)
score2 = strings.TrimSpace(score2)
if len(score1) > 0 {
score = score1 + " " + score2
} else {
score = score2
}
}
}
}
var fileUrls []string
{
urls := regexp_file.FindAllString(string(body2), -1)
for _, url := range urls {
if knownType(path.Base(url)) {
fileUrls = append(fileUrls, url)
}
}
}
matches = append(matches, WosRecord{title, machineType, publication, fileUrls, score})
}
}
return matches, nil
}
// Fetch the specified URL and store to the given open file
func httpGet(url string, outfile io.Writer) error {
resp, err := http.Get(url)
defer resp.Body.Close()
if err != nil {
return err
}
_, err = io.Copy(outfile, resp.Body)
return err
}
// Download from [ftp.worldofspectrum.org].
// An URL can be obtained by calling function WosQuery.
func WosGet(app *Application, stdout io.Writer, url string) (string, error) {
filename := path.Base(url)
dir := DownloadPath()
filePath := path.Join(dir, filename)
httpURL := baseURL + url
if err := os.MkdirAll(dir, 0777); err != nil {
return "", err
}
// Already downloaded in the past ?
if _, err := os.Stat(filePath); err == nil {
fmt.Fprintf(stdout, "Not downloading, file %s already exists\n", filePath)
return filePath, nil
}
// The actual download:
fmt.Fprintf(stdout, "Downloading into %s\n", filePath)
f, err := os.Create(filePath)
if err != nil {
return "", err
}
if err = httpGet(httpURL, f); err != nil {
os.Remove(filePath)
return "", err
}
err = f.Close()
if err != nil {
os.Remove(filePath)
return "", err
}
return filePath, nil
}