如何在 pharo/smalltalk 中提取和存储服务器响应返回的 key/value

Question

在我的 ZnClient 请求中，我从服务器得到了一个 HTML 格式的响应，其中包含我想提取和存储以备后用的键和值。我如何在 Pharo 中执行此操作？

<div id="login_block">
  <div class="text-center"><img src="/static/img/logo-mool2016.black.7272bc78ba54.png" width="223"  alt=LOGO" onclick="showChooseLogin();"></div>
    <h3 class="text-center">Connectez-vous pour accÃ©der Ã  <span class="product-name">Tool Platform</span></h3>
  <div id="login_choosen" class="login_block ui-widget-content ui-corner-all">
   <form method="post" action="." id="login_form"><input type='hidden' name='csrfmiddlewaretoken' value='fLTzkLA7yhy7YKDvohM0PJstFJJCEk2JinfjOyzCe2NA495QKznLgO1wzi64P2S8' />
      <p><label for="id_email">EmailÂ :</label> <input class="login" id="id_email" maxlength="75" name="email" type="text" required /></p>
<p><label for="id_password">PasswordÂ :</label> <input class="login" id="id_password" name="password" type="password" required /></p>
      <button type="submit" class="btn btn-connect pull-right">Connexion</button>
    </form>
  </div>
</div>

Answer 1

您可以使用 HTML 解析器提取此信息，例如 Soup。

这是一个精简的工作示例：

|content soup dict|

content := '
<div>
  <form method="post" action="." id="login_form">
    <input type="hidden" name="csrfmiddlewaretoken" value="***special***" />
    <input class="login" id="id_email" name="email" type="text" required />
  </form>
</div>'.

dict := Dictionary new.
soup := Soup fromString: content.

(soup findAllTags: 'input') do: [ :each |
    dict at: (each attributeAt: 'name') put: (each attributeAt: 'value') ].

dict 现在包含以下内容：

'csrfmiddlewaretoken'->'***special***' 
'email'->nil

Answer 2

您可以从 Pharo 目录加载 XMLParserHTML and XPath。那么这应该可以解决问题：

| xPath htmlDoc inputs input |

"match inputs with token value of the name attrite"
xPath   := '//input[@name="csrfmiddlewaretoken"]' asXPath.

"parse your html"
htmlDoc := (XMLHTMLParser on: htmlString) parseDocument. 

"match all inputs with the token"
inputs  := xPath in: htmlDoc.

"assuming there is only 1 element like that"
input   := inputs first.

"get the value attribute from the element"
^ input attributeAt: 'value'.

如何在 pharo/smalltalk 中提取和存储服务器响应返回的 key/value

How can I extract and store and key/value returned by a server response in pharo/smalltalk

pharo