我使用Elasticsearch Java API（版本2.1.1）和查询字符串查询。查询字符串由用户输入，可能包含语法错误。现在，似乎查询被发送到服务器，响应是 shardFailure 并抛出异常。
在将查询发送到服务器之前，是否有一种简单的方法可以在API中验证查询？现在我抓住了异常，但是用这些查询打扰服务器感觉不对。
查询构建如下：
QueryBuilders.queryStringQuery("error)");
回复示例：
QueryParsingException [无法解析查询[错误]]];嵌套： NotSerializableExceptionWrapper [无法解析＆＃39;错误）＆＃39;：遇到＆＃34; ＆＃34;）＆＃34; ＆＃34;）＆＃34;＆＃34;在第1栏第5栏。
编辑： 要明确： 查询完全可以包含括号或引号等特殊字符。我只想检查用户是否输入了正确的搜索查询（例如，成对的所有括号/引号）。
答案 0 :(得分：0)
为时已晚，但是Elasticsearch现在有一个Validate API，它仅验证但不进行服务器调用。
答案 1 :(得分：-2)
在将字符串传递给方法之前，您必须解析字符串并转义所有特殊字符。
#!/usr/bin/python
from __future__ import absolute_import, print_function, unicode_literals
from optparse import OptionParser
import sys
import dbus
import dbus.service
import dbus.mainloop.glib
import gobject as GObject
import bluezutils
import config_file
import config_def
BUS_NAME = 'org.bluez'
AGENT_INTERFACE = 'org.bluez.Agent1'
AGENT_PATH = "/test/agent"
bus = None
device_obj = None
dev_path = None
def ask(prompt):
try:
return raw_input(prompt)
except:
return input(prompt)
def set_trusted(path):
props = dbus.Interface(bus.get_object("org.bluez", path), "org.freedesktop.DBus.Properties")
props.Set("org.bluez.Device1", "Trusted", True)
def dev_connect(path):
dev = dbus.Interface(bus.get_object("org.bluez", path), "org.bluez.Device1")
dev.Connect()
class Rejected(dbus.DBusException):
_dbus_error_name = "org.bluez.Error.Rejected"
class Agent(dbus.service.Object):
exit_on_release = True
def set_exit_on_release(self, exit_on_release):
self.exit_on_release = exit_on_release
@dbus.service.method(AGENT_INTERFACE, in_signature="", out_signature="")
def Release(self):
print("Release")
if self.exit_on_release:
mainloop.quit()
@dbus.service.method(AGENT_INTERFACE, in_signature="os", out_signature="")
def AuthorizeService(self, device, uuid):
print("AuthorizeService (%s, %s)" % (device, uuid))
authorize = ask("Authorize connection (yes/no): ")
if (authorize == "yes"):
return
raise Rejected("Connection rejected by user")
@dbus.service.method(AGENT_INTERFACE, in_signature="o", out_signature="s")
def RequestPinCode(self, device):
print("RequestPinCode (%s)" % (device))
set_trusted(device)
return ask("Enter PIN Code: ")
#return config_file.get(config_def.BLE_SECTION, config_def.BLE_PIN)
@dbus.service.method(AGENT_INTERFACE, in_signature="o", out_signature="u")
def RequestPasskey(self, device):
print("RequestPasskey (%s)" % (device))
set_trusted(device)
passkey = ask("Enter passkey: ")
return dbus.UInt32(passkey)
#return config_file.get(config_def.BLE_SECTION, config_def.BLE_PIN)
@dbus.service.method(AGENT_INTERFACE, in_signature="ouq", out_signature="")
def DisplayPasskey(self, device, passkey, entered):
print("DisplayPasskey (%s, %06u entered %u)" % (device, passkey, entered))
@dbus.service.method(AGENT_INTERFACE, in_signature="os", out_signature="")
def DisplayPinCode(self, device, pincode):
print("DisplayPinCode (%s, %s)" % (device, pincode))
@dbus.service.method(AGENT_INTERFACE, in_signature="ou", out_signature="")
def RequestConfirmation(self, device, passkey):
print("RequestConfirmation (%s, %06d)" % (device, passkey))
confirm = ask("Confirm passkey (yes/no): ")
if (confirm == "yes"):
set_trusted(device)
return
raise Rejected("Passkey doesn't match")
@dbus.service.method(AGENT_INTERFACE, in_signature="o", out_signature="")
def RequestAuthorization(self, device):
print("RequestAuthorization (%s)" % (device))
auth = ask("Authorize? (yes/no): ")
if (auth == "yes"):
return
raise Rejected("Pairing rejected")
@dbus.service.method(AGENT_INTERFACE, in_signature="", out_signature="")
def Cancel(self):
print("Cancel")
def pair_reply():
print("Device paired")
set_trusted(dev_path)
dev_connect(dev_path)
mainloop.quit()
def pair_error(error):
err_name = error.get_dbus_name()
if err_name == "org.freedesktop.DBus.Error.NoReply" and device_obj:
print("Timed out. Cancelling pairing")
device_obj.CancelPairing()
else:
print("Creating device failed: %s" % (error))
mainloop.quit()
if __name__ == '__main__':
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
capability = "KeyboardDisplay"
parser = OptionParser()
parser.add_option("-i", "--adapter", action="store",
type="string",
dest="adapter_pattern",
default=None)
parser.add_option("-c", "--capability", action="store",
type="string", dest="capability")
parser.add_option("-t", "--timeout", action="store",
type="int", dest="timeout",
default=60000)
(options, args) = parser.parse_args()
if options.capability:
capability = options.capability
path = "/test/agent"
agent = Agent(bus, path)
mainloop = GObject.MainLoop()
print("Capability:" + capability)
obj = bus.get_object(BUS_NAME, "/org/bluez");
manager = dbus.Interface(obj, "org.bluez.AgentManager1")
manager.RegisterAgent(path, capability)
#manager.RegisterAgent(agent, capability)
print("Agent registered")
# Fix-up old style invocation (BlueZ 4)
if len(args) > 0 and args[0].startswith("hci"):
options.adapter_pattern = args[0]
del args[:1]
if len(args) > 0:
print("Custom Agent Registered")
device = bluezutils.find_device(args[0],
options.adapter_pattern)
dev_path = device.object_path
agent.set_exit_on_release(False)
device.Pair(reply_handler=pair_reply, error_handler=pair_error,
timeout=60000)
device_obj = device
else:
manager.RequestDefaultAgent(path)
#manager.RequestDefaultAgent(agent)
print("Default Agent Registered")
mainloop.run()
如果需要，您也可以删除所有特殊字符。
希望这有帮助。