feat: implement caldav search

vendor/github.com/dolanor/caldav-go/http/server.go

@@ -0,0 +1,48 @@
+package http
+
+import (
+	"github.com/dolanor/caldav-go/utils"
+	"io"
+	"log"
+	"net/url"
+	spath "path"
+	"strings"
+)
+
+var _ = log.Print
+
+// a server that accepts HTTP requests
+type Server struct {
+	baseUrl *url.URL
+}
+
+// creates a reference to an http server
+func NewServer(baseUrlStr string) (*Server, error) {
+	var err error
+	var s = new(Server)
+	if s.baseUrl, err = url.Parse(baseUrlStr); err != nil {
+		return nil, utils.NewError(NewServer, "unable to parse server base url", baseUrlStr, err)
+	} else {
+		return s, nil
+	}
+}
+
+// converts a path name to an absolute URL
+func (s *Server) UserInfo() *url.Userinfo {
+	return s.baseUrl.User
+}
+
+// converts a path name to an absolute URL
+func (s *Server) AbsUrlStr(path string) string {
+	uri := *s.baseUrl
+	uri.Path = spath.Join(uri.Path, path)
+	if strings.HasSuffix(path, "/") {
+		uri.Path = uri.Path + "/"
+	}
+	return uri.String()
+}
+
+// creates a new HTTP request object
+func (s *Server) NewRequest(method string, path string, body ...io.ReadCloser) (*Request, error) {
+	return NewRequest(method, s.AbsUrlStr(path), body...)
+}