// Dump the content of the database into a file based
// on a few different formats
func Dump(qs graph.QuadStore, outFile, typ string) error {
var f *os.File
if outFile == "-" {
f = os.Stdout
} else {
var err error
f, err = os.Create(outFile)
if err != nil {
return fmt.Errorf("could not open file %q: %v", outFile, err)
}
defer f.Close()
fmt.Printf("dumping db to file %q\n", outFile)
}
var export *exporter.Exporter
if filepath.Ext(outFile) == ".gz" {
gzip := gzip.NewWriter(f)
defer gzip.Close()
export = exporter.NewExporter(gzip, qs)
} else {
export = exporter.NewExporter(f, qs)
}
//TODO: add possible support for exporting specific queries only
switch typ {
case "quad":
export.ExportQuad()
case "json":
export.ExportJson()
// gml/graphml experimental
case "gml":
export.ExportGml()
case "graphml":
export.ExportGraphml()
default:
return fmt.Errorf("unknown format %q", typ)
}
if export.Err() != nil {
return export.Err()
}
if outFile != "-" {
fmt.Printf("%d entries were written\n", export.Count())
}
return nil
}
// Dump the content of the database into a file based
// on a few different formats
func Dump(qs graph.QuadStore, outFile, typ string) error {
var f *os.File
if outFile == "-" {
f = os.Stdout
} else {
var err error
f, err = os.Create(outFile)
if err != nil {
return fmt.Errorf("could not open file %q: %v", outFile, err)
}
defer f.Close()
fmt.Printf("dumping db to file %q\n", outFile)
}
var w io.Writer = f
if filepath.Ext(outFile) == ".gz" {
gzip := gzip.NewWriter(f)
defer gzip.Close()
w = gzip
}
qr := graph.NewQuadReader(qs) //TODO: add possible support for exporting specific queries only
if typ == "quad" { // compatibility
typ = "nquads"
}
format := quad.FormatByName(typ)
if format == nil {
return fmt.Errorf("unknown format %q", typ)
} else if format.Writer == nil {
return fmt.Errorf("format %q: encoding is not supported", typ)
}
qw := format.Writer(w)
count, err := quad.Copy(qw, qr)
if err != nil {
qw.Close()
return err
}
if err = qw.Close(); err != nil {
return err
}
if outFile != "-" {
fmt.Printf("%d entries were written\n", count)
}
return nil
}
func save(file, passphrase string, sites []Site) error {
// If the file doesn't exist then create it
if _, err := os.Stat(file); os.IsNotExist(err) {
_, err = os.Create(file)
if err != nil {
return err
}
}
// Marshal the JSON
b, err := json.Marshal(sites)
if err != nil {
return err
}
b, err = encrypt(encodeBase64(b), passphrase)
if err != nil {
return err
}
// Compress the contents
var buffer bytes.Buffer
gzip := gzip.NewWriter(&buffer)
if err != nil {
return err
}
gzip.Write(b)
gzip.Close()
// Write to the file
fi, err := os.OpenFile(file, os.O_WRONLY, 0666)
if err != nil {
return err
}
_, err = fi.Write(buffer.Bytes())
if err != nil {
return err
}
fi.Close()
return nil
}
// DecodedData returns the Base64 decoded, gunzip'd decoded data per
// http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/Subscriptions.html
// You should expect to see a response with an array of Amazon Kinesis.
// The Data attribute in the Amazon Kinesis record is Base64 encoded and compressed
// with the gzip format. You can examine the raw data from the command line
// using the following Unix commands:
// echo -n "<Content of Data>" | base64 -d | zcat
func (awsLogs *AWSLogs) DecodedData() (*CloudWatchLogEvent, error) {
data, err := base64.StdEncoding.DecodeString(awsLogs.Data)
if err != nil {
return nil, err
}
in := bytes.NewReader(data)
gzip, err := gzip.NewReader(in)
if nil != err {
return nil, err
}
defer gzip.Close()
allData, err := ioutil.ReadAll(gzip)
if err != nil {
return nil, err
}
var cloudWatchEvent CloudWatchLogEvent
err = json.Unmarshal(allData, &cloudWatchEvent)
if nil != err {
return nil, err
}
return &cloudWatchEvent, nil
}
// Read the password book
func read(file, passphrase string) ([]Site, error) {
// If the file doesn't exist yet no worries
if _, err := os.Stat(file); os.IsNotExist(err) {
return []Site{}, nil
}
// Bring in the compressed data
fi, err := os.Open(file)
if err != nil {
return nil, err
}
// Decompress the file contents
gzip, err := gzip.NewReader(fi)
if err != nil {
return nil, err
}
decompressed, err := ioutil.ReadAll(gzip)
gzip.Close()
// Decrypt the contents
decompressed, err = decrypt(decompressed, passphrase)
if err != nil {
return nil, err
}
decompressed = decodeBase64(decompressed)
// Unmarshal the JSON information
var sites []Site
err = json.Unmarshal(decompressed, &sites)
if err != nil {
return nil, err
}
fi.Close()
return sites, nil
}
