/
saxer.go
186 lines (175 loc) · 5.07 KB
/
saxer.go
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package main
import (
"fmt"
"os"
"path"
"gopkg.in/alecthomas/kingpin.v2"
"github.com/tcw/saxer/saxReader"
"io"
"bufio"
"strings"
"log"
"runtime/pprof"
"sync"
"github.com/tcw/saxer/contentBuffer"
"github.com/tcw/saxer/tagMatcher"
)
var (
query = kingpin.Arg("query", "Sax query expression").Required().String()
filename = kingpin.Arg("file", "xml-file").String()
isInnerXml = kingpin.Flag("inner", "Inner-xml of selected element (default false)").Short('i').Default("false").Bool()
count = kingpin.Flag("count", "Number of matches (default false)").Short('n').Default("false").Bool()
meta = kingpin.Flag("meta", "Get query meta data - linenumbers and path of matches (default false)").Short('m').Default("false").Bool()
firstN = kingpin.Flag("firstN", "First n matches (default (0 = all matches))").Short('f').Default("0").Int()
unescape = kingpin.Flag("unescape", "Unescape html escape tokens (< > ...)").Short('u').Default("false").Bool()
caseSesitive = kingpin.Flag("case", "Turn on case insensitivity").Short('s').Default("false").Bool()
omitNamespace = kingpin.Flag("omit-ns", "Omit namespace in tag-name matches").Short('o').Default("false").Bool()
containMatch = kingpin.Flag("contains", "Maching of tag-name and attributes is executed by contains (not equals)").Short('c').Default("false").Bool()
wrapResult = kingpin.Flag("wrap", "Wrap result in Xml tag").Short('w').Default("false").Bool()
singleLine = kingpin.Flag("single-line", "Each node will have a single line (Changes line ending!)").Short('l').Default("false").Bool()
tagBuffer = kingpin.Flag("tag-buf", "Size of element tag buffer in KB - tag size").Default("4").Int()
contentBuf = kingpin.Flag("cont-buf", "Size of content buffer in MB - returned elements size").Default("4").Int()
cpuProfile = kingpin.Flag("profile-cpu", "Profile parser").Bool()
)
const ONE_KB int = 1024
const ONE_MB int = ONE_KB * ONE_KB
func main() {
kingpin.Version("0.0.7")
kingpin.Parse()
//go tool pprof --pdf saxer cpu.pprof > callgraph.pdf
//evince callgraph.pdf
if *cpuProfile {
f, err := os.Create("cpu.pprof")
if err != nil {
log.Fatal(err)
}
pprof.StartCPUProfile(f)
fmt.Println("profiling!")
defer pprof.StopCPUProfile()
}
if strings.TrimSpace(*filename) != "" {
absFilename, err := abs(*filename)
if err != nil {
fmt.Printf("Error finding file: %s\n",absFilename)
}
file, err := os.Open(absFilename)
if err != nil {
fmt.Printf("Error opening file: %s\n",absFilename)
}
defer file.Close()
SaxXmlInput(file)
} else {
reader := bufio.NewReader(os.Stdin)
SaxXmlInput(reader)
}
}
func emitterMetaPrinter(emitter chan contentBuffer.EmitterData, wg *sync.WaitGroup) {
for {
ed := <-emitter
fmt.Printf("%d-%d %s\n", ed.LineStart, ed.LineEnd, ed.NodePath)
wg.Done()
}
}
func emitterPrinter(emitter chan string, wg *sync.WaitGroup, line bool, htmlEscape bool) {
r := strings.NewReplacer(""", "\"",
"'", "'",
"<", "<",
">", ">",
"&", "&")
for {
node := <-emitter
if htmlEscape {
node = r.Replace(node)
}
if line {
fmt.Println(strings.Replace(node, "\n", " ", -1))
} else {
fmt.Println(node)
}
wg.Done()
}
}
func SaxXmlInput(reader io.Reader) {
var err error
var sr saxReader.SaxReader
sr = saxReader.NewSaxReaderNoEmitter()
tm := tagMatcher.NewTagMatcher(*query)
if *containMatch {
tm.EqualityFn = tagMatcher.EqFnContains
} else {
tm.EqualityFn = tagMatcher.EqFnEqulas
}
tm.CaseSensitive = !*caseSesitive
tm.WithoutNamespace = *omitNamespace
sr.IsInnerXml = *isInnerXml
sr.ContentBufferSize = *contentBuf * ONE_MB
sr.ElementBufferSize = *tagBuffer * ONE_KB
if *wrapResult {
fmt.Println("<saxer-result>")
}
if *count {
var counter uint64 = 0
emitterCounter := func(ed *contentBuffer.EmitterData) bool {
counter++
return false
};
sr.EmitterFn = emitterCounter
err = sr.Read(reader, &tm)
fmt.Println(counter)
} else if *meta {
counter := 0
elemChan := make(chan contentBuffer.EmitterData, 100)
var wg sync.WaitGroup
go emitterMetaPrinter(elemChan, &wg)
emitter := func(ed *contentBuffer.EmitterData) bool {
wg.Add(1)
elemChan <- contentBuffer.EmitterData{Content:ed.Content, LineStart:ed.LineStart, LineEnd:ed.LineEnd, NodePath:ed.NodePath}
if *firstN > 0 {
counter++
if counter >= *firstN {
return true
} else {
return false
}
}
return false
};
sr.EmitterFn = emitter
err = sr.Read(reader, &tm)
wg.Wait()
} else {
counter := 0
elemChan := make(chan string, 100)
var wg sync.WaitGroup
go emitterPrinter(elemChan, &wg, *singleLine, *unescape)
emitter := func(ed *contentBuffer.EmitterData) bool {
wg.Add(1)
elemChan <- ed.Content
if *firstN > 0 {
counter++
if counter >= *firstN {
return true
} else {
return false
}
}
return false
};
sr.EmitterFn = emitter
err = sr.Read(reader, &tm)
wg.Wait()
}
if *wrapResult {
fmt.Println("</saxer-result>")
}
if err != nil {
panic(err)
}
}
func abs(name string) (string, error) {
if path.IsAbs(name) {
return name, nil
}
wd, err := os.Getwd()
return path.Join(wd, name), err
}