func indentAndPrint(buf *bytes.Buffer, js []uint8, lineNum int64) {
jsErr := json.Indent(buf, js, "", " ")
if jsErr != nil {
malformedJson(jsErr, js, lineNum)
}
os.Stdout.Write(buf.Bytes())
os.Stdout.Write(newline)
buf.Reset()
}
func printJSON(j []byte) {
var w bytes.Buffer
err := json.Indent(&w, j, "| ", " ")
if err != nil {
fmt.Printf("mon,json,err: %s\nORIG:\n%s\n", err, string(j))
return
}
fmt.Printf("MON:\n%s\n", w.String())
}
func main() {
var (
res *http.Response
err os.Error
inData []byte
)
// Textual names of the weekdays, needed for URL generation
//
weekdays := []string{"Mandag", "Tisdag", "Onsdag", "Torsdag", "Fredag"}
// Parse and validate input
//
flag.Parse()
if *url == "" {
fmt.Println("ERROR: No URL specified")
flag.PrintDefaults()
return
}
if *out == "" {
fmt.Println("ERROR: No output file specified")
flag.PrintDefaults()
return
}
if *city == "" {
fmt.Println("ERROR: No city specified")
flag.PrintDefaults()
return
}
if *week == 0 {
fmt.Println("ERROR: No week specified")
flag.PrintDefaults()
return
}
// Beginning of the JSON data structure creation with
// basic information about this particular menu
//
jsonData := new(DataStruct)
jsonData.City = *city
jsonData.Week = *week
fmt.Printf("Downloading information for %s and week %i\n", *city, *week)
// Iterates all weekdays
//
for day := 0; day < 5; day++ {
// Downloads the current menu from the web
// NOTE: week variable in URL must be provided from the input
//
res, _, err = http.Get(fmt.Sprintf("%s&veckodag=%s", *url, weekdays[day]))
// No error, continue reading HTML data into the inData variable
//
if err == nil {
fmt.Printf("OK, response is %s length is %i\n", res.Status, res.ContentLength)
inData, err = ioutil.ReadAll(res.Body)
res.Body.Close()
} else {
log.Println(err)
}
// No error reading data from the HTML document, continue building the
// JSON data structure with current day and parse the HTML data
//
if err == nil {
jsonData.Days[day].Day = day
jsonData.Days[day].Name = weekdays[day]
jsonData.Days[day].Restaurants = Parse(inData)
} else {
log.Println(err)
}
}
// Generate the JSON code from the data structure
//
var output = bytes.NewBuffer(make([]byte, 0))
var jsonOutput, _ = json.Marshal(jsonData)
json.Indent(output, jsonOutput, "", "") // Indent with no prefix
// Convert the JSON data from *Buffer to a []byte slice
//
var outData = make([]byte, output.Len())
var n, _ = output.Read(outData)
// Compute the md5 hash value of the JSON data
//
var hashStr, hash = GenerateHash(outData)
fmt.Printf("MD5 is: %s\n", hashStr)
// Write JSON data to output file
//
fmt.Printf("Writing %i bytes to %s\n", n, *out)
err = ioutil.WriteFile(*out, outData, 0644)
if err != nil {
log.Println(err)
}
// Write MD5 hash to file
//
fmt.Printf("Writing md5 sum\n")
err = ioutil.WriteFile(fmt.Sprintf("%s.md5", *out), hash, 0644)
if err != nil {
log.Println(err)
}
}