github.com/ghodss/etcd@v0.3.1-0.20140417172404-cc329bfa55cb/server/v2/delete_handler.go (about)

     1  package v2
     2  
     3  import (
     4  	"net/http"
     5  	"strconv"
     6  
     7  	etcdErr "github.com/coreos/etcd/error"
     8  	"github.com/coreos/etcd/third_party/github.com/gorilla/mux"
     9  )
    10  
    11  func DeleteHandler(w http.ResponseWriter, req *http.Request, s Server) error {
    12  	vars := mux.Vars(req)
    13  	key := "/" + vars["key"]
    14  
    15  	recursive := (req.FormValue("recursive") == "true")
    16  	dir := (req.FormValue("dir") == "true")
    17  
    18  	req.ParseForm()
    19  	_, valueOk := req.Form["prevValue"]
    20  	_, indexOk := req.Form["prevIndex"]
    21  
    22  	if !valueOk && !indexOk {
    23  		c := s.Store().CommandFactory().CreateDeleteCommand(key, dir, recursive)
    24  		return s.Dispatch(c, w, req)
    25  	}
    26  
    27  	var err error
    28  	prevIndex := uint64(0)
    29  	prevValue := req.Form.Get("prevValue")
    30  
    31  	if indexOk {
    32  		prevIndexStr := req.Form.Get("prevIndex")
    33  		prevIndex, err = strconv.ParseUint(prevIndexStr, 10, 64)
    34  
    35  		// bad previous index
    36  		if err != nil {
    37  			return etcdErr.NewError(etcdErr.EcodeIndexNaN, "CompareAndDelete", s.Store().Index())
    38  		}
    39  	}
    40  
    41  	if valueOk {
    42  		if prevValue == "" {
    43  			return etcdErr.NewError(etcdErr.EcodePrevValueRequired, "CompareAndDelete", s.Store().Index())
    44  		}
    45  	}
    46  
    47  	c := s.Store().CommandFactory().CreateCompareAndDeleteCommand(key, prevValue, prevIndex)
    48  	return s.Dispatch(c, w, req)
    49  }