ajaxrequest.html

ajax开发框架prototype中文说明帮助

<DL>
<DD>从响应信息头中分离出 JSON 对象,并做执行后把对象返回,此方法主要用于内部调用@see #respondToReadyState()
 <br><b>这里的JSON 内容是放在信息头中以X-JSON为关键字定义</b>
<P>
<DD><DL>

<DT><B>返回：</B><DD>执行返回JSON内容后的对象</DL>
</DD>
</DL>
<HR>

<A NAME="evalResponse()"><!-- --></A><H3>
evalResponse</H3>
<PRE>
public java.lang.Object <B>evalResponse</B>()</PRE>
<DL>
<DD>当响应信息头指示Content-type等于text/javascript时自动执行此方法,此方法主要用于内部调用@see #respondToReadyState()
<P>
<DD><DL>

<DT><B>返回：</B><DD>return eval(xmlhttp.responseText);</DL>
</DD>
</DL>
<HR>

<A NAME="respondToReadyState()"><!-- --></A><H3>
respondToReadyState</H3>
<PRE>
protected void <B>respondToReadyState</B>()</PRE>
<DL>
<DD>Ajax请求响应的核心处理方法,内部调用
 
 <br>readyState的定义请参考@see #onStateChange()
 <br>
 <DL>
 <DT><b>如果readyState!=4</b>
        <DD>1) 执行从初始化当前对象时参数options传入的"on" + AjaxRequest.Events[readyState]方法
  <DD>2) 执行Ajax.Responders.dispatch('on' + AjaxRequest.Events[readyState], this, xmlhttp, json);
 <DT><b>如果readyState==4,注意1)与2)的执行先后顺序,如果第一项被执行则将不再做后续动作的执行</b> 
   <DD>1) 执行options中从初始化当前对象时参数options传入的"on" + status方法,status参见下面的<a href="#xmlhttp_status">标准http状态码</a>;调用格式:function onXXX(xmlhttp, json){}
   <DD>2) 执行options中从初始化当前对象时参数options传入的onSuccess或者onFailure方法; 调用格式:function onXXX(xmlhttp, json){}
   <DD>3) 以上动作执行后,将判断返回的Content-type是否是text/javascript,如果是则调用@see #evalResponse()方法; 
   <DD>4) 执行从初始化当前对象时参数options传入的"on" + AjaxRequest.Events[readyState]方法
   <DD>5) 执行Ajax.Responders.dispatch('on' + AjaxRequest.Events[readyState], this, xmlhttp, json);
 </DL>
 
 
 <a name="xmlhttp_status"></a>长整形标准http状态码，定义如下(转自xmlhttp.cn)：
<table class="t1" border="1" cellpadding="3">
<th>
  Number
</th>
<th>
  Description
</th>
</tr><tr>
<td>
<p>100</p>
</td>
<td>
<p>Continue</p>
</td>
</tr><tr>
<td>
<p>101</p>
</td>
<td>
<p>Switching protocols</p>
</td>
</tr><tr>
<td>
<p>200</p>
</td>
<td>
<p>OK</p>
</td>
</tr><tr>
<td>
<p>201</p>
</td>
<td>
<p>Created</p>
</td>
</tr><tr>
<td>
<p>202</p>
</td>
<td>
<p>Accepted</p>
</td>
</tr><tr>
<td>
<p>203</p>
</td>
<td>
<p>Non-Authoritative Information</p>
</td>
</tr><tr>
<td>
<p>204</p>
</td>
<td>
<p>No Content</p>
</td>
</tr><tr>
<td>
<p>205</p>
</td>
<td>
<p>Reset Content</p>
</td>
</tr><tr>
<td>
<p>206</p>
</td>
<td>
<p>Partial Content</p>
</td>
</tr><tr>
<td>
<p>300</p>
</td>
<td>
<p>Multiple Choices</p>
</td>
</tr><tr>
<td>
<p>301</p>
</td>
<td>
<p>Moved Permanently</p>
</td>
</tr><tr>
<td>
<p>302</p>
</td>
<td>
<p>Found</p>
</td>
</tr><tr>
<td>
<p>303</p>
</td>
<td>
<p>See Other</p>
</td>
</tr><tr>
<td>
<p>304</p>
</td>
<td>
<p>Not Modified</p>
</td>
</tr><tr>
<td>
<p>305</p>
</td>
<td>
<p>Use Proxy</p>
</td>
</tr><tr>
<td>
<p>307</p>
</td>
<td>
<p>Temporary Redirect</p>
</td>
</tr><tr>
<td>
<p>400</p>
</td>
<td>
<p>Bad Request</p>
</td>
</tr><tr>
<td>
<p>401</p>
</td>
<td>
<p>Unauthorized</p>
</td>
</tr><tr>
<td>
<p>402</p>
</td>
<td>
<p>Payment Required</p>
</td>
</tr><tr>
<td>
<p>403</p>
</td>
<td>
<p>Forbidden</p>
</td>
</tr><tr>
<td>
<p>404</p>
</td>
<td>
<p>Not Found</p>
</td>
</tr><tr>
<td>
<p>405</p>
</td>
<td>
<p>Method Not Allowed</p>
</td>
</tr><tr>
<td>
<p>406</p>
</td>
<td>
<p>Not Acceptable</p>
</td>
</tr><tr>
<td>
<p>407</p>
</td>
<td>
<p>Proxy Authentication Required</p>
</td>
</tr><tr>
<td>
<p>408</p>
</td>
<td>
<p>Request Timeout</p>
</td>
</tr><tr>
<td>
<p>409</p>
</td>
<td>
<p>Conflict</p>
</td>
</tr><tr>
<td>
<p>410</p>
</td>
<td>
<p>Gone</p>
</td>
</tr><tr>
<td>
<p>411</p>
</td>
<td>
<p>Length Required</p>
</td>
</tr><tr>
<td>
<p>412</p>
</td>
<td>
<p>Precondition Failed</p>
</td>
</tr><tr>
<td>
<p>413</p>
</td>
<td>
<p>Request Entity Too Large</p>
</td>
</tr><tr>
<td>
<p>414</p>
</td>
<td>
<p>Request-URI Too Long</p>
</td>
</tr><tr>
<td>
<p>415</p>
</td>
<td>
<p>Unsupported Media Type</p>
</td>
</tr><tr>
<td>
<p>416</p>
</td>
<td>
<p>Requested Range Not Suitable</p>
</td>
</tr><tr>
<td>
<p>417</p>
</td>
<td>
<p>Expectation Failed</p>
</td>
</tr><tr>
<td>
<p>500</p>
</td>
<td>
<p>Internal Server Error</p>
</td>
</tr><tr>
<td>
<p>501</p>
</td>
<td>
<p>Not Implemented</p>
</td>
</tr><tr>
<td>
<p>502</p>
</td>
<td>
<p>Bad Gateway</p>
</td>
</tr><tr>
<td>
<p>503</p>
</td>
<td>
<p>Service Unavailable</p>
</td>
</tr><tr>
<td>
<p>504</p>
</td>
<td>
<p>Gateway Timeout</p>
</td>
</tr><tr>
<td>
<p>505</p>
</td>
<td>
<p>HTTP Version Not Supported</p>
</td>
</tr></table>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="dispatchException(java.lang.Object)"><!-- --></A><H3>
dispatchException</H3>
<PRE>
protected void <B>dispatchException</B>(java.lang.Object&nbsp;e)</PRE>
<DL>
<DD>当前Ajax执行出现异常时调用此方法
 此方法首先判断从AjaxRequest初始化时传入的options中是否包含onException属性,如果包含则做执行
 ,此后再执行AjaxResponders.dispatch("onException", this, exception);
<P>
<DD><DL>
</DL>
</DD>
</DL>
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