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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "compress/zlib" | ||
| "encoding/binary" | ||
| "fmt" | ||
| "io" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "os" | ||
| "strconv" | ||
|
|
||
| flag "github.com/spf13/pflag" | ||
| "golang.org/x/text/encoding/simplifiedchinese" | ||
| "golang.org/x/text/transform" | ||
| ) | ||
|
|
||
| const ( | ||
| urlCopywrite = "http://update.cz88.net/ip/copywrite.rar" | ||
| urlQqwryDat = "http://update.cz88.net/ip/qqwry.rar" | ||
| ) | ||
|
|
||
| var ( | ||
| outputFile string | ||
| quiet, help bool | ||
|
|
||
| fileSize uint64 | ||
| fileSizeW int | ||
| ) | ||
|
|
||
| type FetchWriter struct { | ||
| n uint64 | ||
| } | ||
|
|
||
| func (w *FetchWriter) Write(p []byte) (int, error) { | ||
| n := len(p) | ||
| w.n += uint64(n) | ||
| w.progress() | ||
| return n, nil | ||
| } | ||
|
|
||
| func (w *FetchWriter) progress() { | ||
| printf("\rfetch: %6.2f%% %*d/%d bytes", float64(w.n)/float64(fileSize)*100, fileSizeW, w.n, fileSize) | ||
| } | ||
|
|
||
| func fetch(key uint32) error { | ||
| resp, err := http.Get(urlQqwryDat) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer resp.Body.Close() | ||
| size, err := strconv.ParseUint(resp.Header.Get("Content-Length"), 10, 32) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if size != fileSize { | ||
| return fmt.Errorf("the file size of the agreement is different") | ||
| } | ||
|
|
||
| var b []byte | ||
| buffer := bytes.NewBuffer(b[:]) | ||
|
|
||
| _, err = io.Copy(buffer, io.TeeReader(resp.Body, &FetchWriter{})) | ||
| printf("\n") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| b = buffer.Bytes() | ||
|
|
||
| // 解码前512字节 | ||
| for i := 0; i < 0x200; i++ { | ||
| key *= 0x805 | ||
| key++ | ||
| key &= 0xFF | ||
| b[i] = b[i] ^ byte(key) | ||
| } | ||
|
|
||
| r, err := zlib.NewReader(bytes.NewBuffer(b)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer r.Close() | ||
|
|
||
| f, err := os.Create(outputFile) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| _, err = io.Copy(f, r) | ||
| return err | ||
| } | ||
|
|
||
| func init() { | ||
| flag.BoolVarP(&quiet, "quiet", "q", false, "only output error") | ||
| flag.BoolVarP(&help, "help", "h", false, "this help") | ||
| flag.CommandLine.SortFlags = false | ||
| flag.Parse() | ||
|
|
||
| flag.Usage = func() { | ||
| fmt.Fprintf(os.Stderr, "iploc-fetch: fetch qqwry.dat.\nUsage: iploc-fetch [output filename] [arguments]\nOptions:\n") | ||
| flag.PrintDefaults() | ||
| } | ||
|
|
||
| outputFile = flag.Arg(0) | ||
|
|
||
| if outputFile == "" || help { | ||
| flag.Usage() | ||
| if help { | ||
| os.Exit(0) | ||
| } | ||
| os.Exit(1) | ||
| } | ||
| } | ||
|
|
||
| func main() { | ||
| resp, err := http.Get(urlCopywrite) | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, err.Error()) | ||
| os.Exit(1) | ||
| } | ||
| b, err := ioutil.ReadAll(resp.Body) | ||
| resp.Body.Close() | ||
|
|
||
| fatal(err) | ||
|
|
||
| s := readVersion(b) | ||
| if s == nil { | ||
| fatal(fmt.Errorf("invalid file description")) | ||
| } | ||
| fileSize = uint64(binary.LittleEndian.Uint32(b[12:])) | ||
| fileSizeW = len(fmt.Sprint(fileSize)) | ||
| key := binary.LittleEndian.Uint32(b[20:]) | ||
|
|
||
| printf("version: %s\n", toUTF8(s)) | ||
| printf("fetch: ...") | ||
|
|
||
| fatal(fetch(key)) | ||
| } | ||
|
|
||
| func readVersion(p []byte) []byte { | ||
| var start = 24 | ||
| var end int | ||
|
|
||
| if start >= len(p) { | ||
| return nil | ||
| } | ||
|
|
||
| // 0x20 ASCII space | ||
| for p[start] != 0x20 { | ||
| start++ | ||
| } | ||
| start += 1 | ||
| end = start | ||
|
|
||
| if end >= len(p) { | ||
| return nil | ||
| } | ||
|
|
||
| for p[end] != 0x00 { | ||
| end++ | ||
| } | ||
| return p[start:end] | ||
| } | ||
|
|
||
| func toUTF8(s []byte) (b []byte) { | ||
| r := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder()) | ||
| b, _ = ioutil.ReadAll(r) | ||
| return | ||
| } | ||
|
|
||
| func fatal(err error) { | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, err.Error() + "\n") | ||
| os.Exit(1) | ||
| } | ||
| } | ||
|
|
||
| func printf(format string, args ...interface{}) { | ||
| if quiet { | ||
| return | ||
| } | ||
| fmt.Printf(format, args...) | ||
| } |
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