XPath 特定表达式 WebDriver 错误答案

【问题标题】：XPath Specific Expression WebDriver ErrorXPath 特定表达式 WebDriver 错误
【发布时间】：2020-02-28 06:11:30
【问题描述】：

我对 WebDriver 的 XPath 有一个问题，即使它是正确的，它也会返回一个错误表达式。

表达式为：

(*//div[contains(@class, 'myb-SettledBetItem ') or contains(@class, 'myb-OpenBetItem_Collapsed') or contains(@class, 'myb-OpenBetItem ')]//(span[@class='myb-SettledBetParticipant_ParticipantSpan ' or @class='myb-OpenBetParticipant_ParticipantSpan']|div[@class='myb-SettledBetItem_SubHeaderText']))

html 是：

<div class="myb-BetItemsContainer_BetItemsContainer ">
    <div class="myb-SettledBetItem ">
        <div class="myb-SettledBetItemHeader ">
            <div class="myb-SettledBetItemHeader_HeaderTextContainer ">
                <div class="myb-SettledBetItemHeader_Title ">
                    <div class="myb-SettledBetItemHeader_Text ">R$0,50 Simples</div>
                </div>
                <div class="myb-SettledBetItem_SubHeaderText "></div>
            </div>
            <div class="myb-SettledBetItem_BetStateContainer ">
                <div class="myb-SettledBetItem_BetStateLabel ">Retorno Obtido</div>
                <div class="myb-SettledBetItem_BetReturnLabel ">R$1,19</div>
            </div>
        </div>
        <div>
            <div>
                <div class="myb-SettledBetParticipant-FirstOfType myb-SettledBetParticipant myb-SettledBetParticipant_Won ">
                    <div class="myb-SettledBetParticipant_Header ">
                        <div class="myb-SettledBetParticipant_HeaderTitle ">
                            <div class="myb-SettledBetParticipant_HeaderText "><span class="myb-SettledBetParticipant_ParticipantSpan ">Hollyoak Hector (v Courts Ad Darcey) </span>
                                <div class="myb-HalfAndHalfPill myb-HalfAndHalfPill_Status-1 ">
                                    <div class="myb-HalfAndHalfPill_TextStatus myb-HalfAndHalfPill_TextStatus-1 ">
                                        <div class="myb-HalfAndHalfPill_TextStatusLHS myb-HalfAndHalfPill_TextStatusLHS-1 "></div>
                                        <div class="myb-HalfAndHalfPill_TextStatusRHS myb-HalfAndHalfPill_TextStatusRHS-1 "></div>
                                    </div>
                                </div>
                            </div>
                        </div>
                        <div class="myb-SettledBetParticipant_HeaderOdds ">2.37</div>
                    </div>
                    <div class="myb-SettledBetParticipant_MarketDescription ">Aposta Comparativa</div>
                    <div class="myb-SettledBetParticipant_FixtureDescription ">8.27 Central Park EVE (Corrida 8)</div>
                </div>
            </div>
            <div class="myb-SettledBetItemFooter ">
                <div class="myb-SettledBetItemFooter_BetInformation ">
                    <div class="myb-SettledBetItemFooter_StakeInformation ">
                        <div class="myb-SettledBetItemFooter_StakeLabel ">Aposta</div>
                        <div class="myb-SettledBetItemFooter_StakeTextWrapper "><span class="myb-SettledBetItemFooter_StakeTextCurrency myb-SettledBetItemFooter_StakeTextCurrency-formatted ">R$</span><span class="myb-SettledBetItemFooter_StakeText ">0,50</span></div>
                    </div>
                    <div class="myb-SettledBetItemFooter_ReturnInformation ">
                        <div class="myb-SettledBetItemFooter_ReturnLabel ">Retorno Total</div>
                        <div class="myb-SettledBetItemFooter_ReturnTextWrapper "><span class="myb-SettledBetItemFooter_ReturnTextCurrency myb-SettledBetItemFooter_ReturnTextCurrency-formatted ">R$</span><span class="myb-SettledBetItemFooter_ReturnText ">1,19</span></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="myb-SettledBetItem ">
        <div class="myb-SettledBetItemHeader ">
            <div class="myb-SettledBetItemHeader_HeaderTextContainer ">
                <div class="myb-SettledBetItemHeader_Title ">
                    <div class="myb-SettledBetItemHeader_Text ">R$0,50 Simples</div>
                </div>
                <div class="myb-SettledBetItem_SubHeaderText "></div>
            </div>
            <div class="myb-SettledBetItem_BetStateContainer ">
                <div class="myb-SettledBetItem_BetStateLabel ">Retorno Obtido</div>
                <div class="myb-SettledBetItem_BetReturnLabel ">R$0,77</div>
            </div>
        </div>
        <div>
            <div>
                <div class="myb-SettledBetParticipant-FirstOfType myb-SettledBetParticipant myb-SettledBetParticipant_Won ">
                    <div class="myb-SettledBetParticipant_Header ">
                        <div class="myb-SettledBetParticipant_HeaderTitle ">
                            <div class="myb-SettledBetParticipant_HeaderText "><span class="myb-SettledBetParticipant_ParticipantSpan ">Trap 8 </span>
                                <div class="myb-HalfAndHalfPill myb-HalfAndHalfPill_Status-1 ">
                                    <div class="myb-HalfAndHalfPill_TextStatus myb-HalfAndHalfPill_TextStatus-1 ">
                                        <div class="myb-HalfAndHalfPill_TextStatusLHS myb-HalfAndHalfPill_TextStatusLHS-1 "></div>
                                        <div class="myb-HalfAndHalfPill_TextStatusRHS myb-HalfAndHalfPill_TextStatusRHS-1 "></div>
                                    </div>
                                </div>
                            </div>
                        </div>
                        <div class="myb-SettledBetParticipant_HeaderOdds ">1.53</div>
                    </div>
                    <div class="myb-SettledBetParticipant_MarketDescription ">Vencedor e V/C Ao-Vivo</div>
                    <div class="myb-SettledBetParticipant_FixtureDescription ">Race 15 Palm Beach</div>
                </div>
            </div>
            <div class="myb-SettledBetItemFooter ">
                <div class="myb-SettledBetItemFooter_BetInformation ">
                    <div class="myb-SettledBetItemFooter_StakeInformation ">
                        <div class="myb-SettledBetItemFooter_StakeLabel ">Aposta</div>
                        <div class="myb-SettledBetItemFooter_StakeTextWrapper "><span class="myb-SettledBetItemFooter_StakeTextCurrency myb-SettledBetItemFooter_StakeTextCurrency-formatted ">R$</span><span class="myb-SettledBetItemFooter_StakeText ">0,50</span></div>
                    </div>
                    <div class="myb-SettledBetItemFooter_ReturnInformation ">
                        <div class="myb-SettledBetItemFooter_ReturnLabel ">Retorno Total</div>
                        <div class="myb-SettledBetItemFooter_ReturnTextWrapper "><span class="myb-SettledBetItemFooter_ReturnTextCurrency myb-SettledBetItemFooter_ReturnTextCurrency-formatted ">R$</span><span class="myb-SettledBetItemFooter_ReturnText ">0,77</span></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

预期结果：

Hollyoak Hector (v Courts Ad Darcey)
陷阱 8

并在网站上进行了测试：http://xpather.com/

返回的错误是：

致命错误：未捕获 Facebook\WebDriver\Exception\InvalidSelectorException：无效选择器：由于以下错误，无法找到具有 xpath 表达式 THIS_EXPRESSION 的元素： SyntaxError：无法对“文档”执行“评估”：字符串 THIS_EXPRESSION 不是有效的 XPath 表达式。 .... 在第 152 行的 DIR/vendor/facebook/webdriver/lib/Exception/WebDriverException.php 中

发生了什么？为什么它不能在 WebDriver 的 Xpath 中工作而在这个站点上工作？这是处理这些数据的最佳方式吗？

【问题讨论】：

标签： php selenium-webdriver xpath webdriver

【解决方案1】：

您的 XPath 表达式仅适用于 XPath-2.0 或更高版本。
要使其在 XPath-1.0 中工作，您必须使用括号拆分您尝试执行的操作：

//div[contains(@class, 'myb-SettledBetItem ') or contains(@class, 'myb-OpenBetItem_Collapsed') or contains(@class, 'myb-OpenBetItem ')]//span[@class='myb-SettledBetParticipant_ParticipantSpan ' or @class='myb-OpenBetParticipant_ParticipantSpan'] | //div[contains(@class, 'myb-SettledBetItem ') or contains(@class, 'myb-OpenBetItem_Collapsed') or contains(@class, 'myb-OpenBetItem ')]/div[@class='myb-SettledBetItem_SubHeaderText']

所以复制表达式的第一部分，然后在两个表达式上应用并集。

【讨论】：