/
http_handler_list.go
164 lines (148 loc) · 5.33 KB
/
http_handler_list.go
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/******************************************************************************
* OmDB
*
* Copyright (c) 2016 Seungyoung Kim.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
package main
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"regexp"
"time"
)
const (
HTTP_HEADER_X_TRUNCATED = "X-Omdb-Truncated"
HTTP_HEADER_X_NEXT = "X-Omdb-Next"
HTML_HEADER = "<html><title>" + PRGNAME + "</title><body style='font-size:12px;'>"
HTML_TAILER = "</body></html>"
HTML_TOOLBOX = "" +
PRGNAME + " v" + VERSION +
"<br>(You're seeing this toolbar because 'html' option is given)<br>" +
"<form onSubmit=\"this.action=document.getElementById('k').value;\"><input type='text' id='k' size='8' placeholder='key'><input type='text' name='v' placeholder='value'><input type='submit' value='ADD'></form>" +
"<form onSubmit=\"document.getElementById('o').value='filter:'+document.getElementById('o').value;\"><input type='text' id='o' name='o' size='8' placeholder='filter regexp'><input type='submit' value='FILTER'></form>" +
"<button type='button' onclick=\"location.href='.'\">refresh</button>" +
"<button type='button' onclick=\"location.href='.?o=showversion'\">showversion</button>" +
"<button type='button' onclick=\"location.href='.?o=showvalue,url'\">showvalue,url</button>" +
"<button type='button' onclick=\"location.href='.?o=showvalue,base64'\">showvalue,base64</button>" +
"<button type='button' onclick=\"location.href='.?o=showvalue,json'\">showvalue,json</button>" +
"<button type='button' onclick=\"location.href='.?o=json'\">json</button>"
HTML_HR = "<hr size='1'>"
)
func doList(w http.ResponseWriter, r *http.Request, k *KeyInfo, o *UrlOptions) (int, string) {
g_info.IncreaseCounter("http.list")
timer := time.Now()
if o.remove == true && conf.Global.DeleteOnList == false {
return http.StatusForbidden, "DeleteOnList option is disabled by configuration.."
}
it := dbf.NewIterator(k.db)
if it == nil {
return http.StatusNotFound, "No such key found."
}
defer it.Close()
start := string(k.name)
start = start[0 : len(start)-1]
if len(start) == 0 {
it.SeekToFirst()
} else {
it.Seek([]byte(start))
}
b := new(bytes.Buffer)
var vms []ValueMeta
scanCount := 0
listCount := 0
for ; it.Valid(); it.Next() {
scanCount = scanCount + 1
key, _ := parseKeyInfo(genKeyPath(k.db, string(it.Key())))
if (o.max > 0 && listCount >= o.max) || (o.maxscan > 0 && scanCount >= o.maxscan) {
w.Header().Add(HTTP_HEADER_X_TRUNCATED, "1")
w.Header().Add(HTTP_HEADER_X_NEXT, urlencode(key.path+"/"))
break
}
// Filter versioned keys
if o.showversion == false && key.IsVersion() == true {
continue
}
// Apply user filter
if o.filter != "" {
matched, err := regexp.MatchString(o.filter, key.path)
if err != nil {
return http.StatusBadRequest, err.Error()
}
if matched == false {
continue
}
}
listCount = listCount + 1
if o.remove == true {
deleteKey(key)
continue
}
if o.encoding == OUTPUT_ENCODING_JSON {
vm, err := DecodeValue(it.Value())
if err != nil {
return http.StatusInternalServerError, err.Error()
}
vm.Key = key.path
if o.showvalue == false {
vm.Value = nil
}
vms = append(vms, *vm)
} else {
b.Write(key.Byte(o.encoding, o.html))
if o.showvalue {
vm, err := DecodeValue(it.Value())
if err != nil {
return http.StatusInternalServerError, err.Error()
}
b.Write([]byte("="))
b.Write(vm.Byte(o.encoding, ""))
}
b.Write([]byte("\n"))
}
}
if o.html {
w.Write([]byte(HTML_HEADER))
w.Write([]byte(HTML_TOOLBOX))
w.Write([]byte("<br>o=" + o.String()))
w.Write([]byte(HTML_HR))
w.Write([]byte("<pre>"))
}
if len(vms) > 0 {
bb, err := json.MarshalIndent(vms, "", "\t")
if err != nil {
return http.StatusInternalServerError, err.Error()
}
w.Write(bb)
} else if b.Len() > 0 {
w.Write(b.Bytes())
}
if o.html {
w.Write([]byte("</pre>"))
w.Write([]byte(HTML_TAILER))
}
return http.StatusOK, fmt.Sprint("runtime:", time.Since(timer))
}