and reducing submitted post data size in large form-6ren"> and reducing submitted post data size in large form-我有一个巨大的 jsf 页面,其中包含一个非常大的表单(包含近 100 个输入)和许多 ajaxified 输入字段。对于每个输入字段,我只提交当前值并且不渲染任何内容。所以只是该形式的示例字段: -6ren">
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jsf - and reducing submitted post data size in large form

转载 作者:行者123 更新时间:2023-12-04 16:46:54 27 4
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我有一个巨大的 jsf 页面,其中包含一个非常大的表单(包含近 100 个输入)和许多 ajaxified 输入字段。对于每个输入字段,我只提交当前值并且不渲染任何内容。所以只是该形式的示例字段:

<h:selectBooleanCheckbox id="includeForeignCurrencies" 
value="#{RatingManagerBean.formData.foreignCurrencies}"
action="#{RatingManagerBean.calculate}">

<f:ajax render="@none" execute="includeForeignCurrencies"/>

</h:selectBooleanCheckbox>

在 ajax 发布后,我会检查例如firebug中的开发者工具,并识别到提交的post数据大小为 2 KB .然后我选择该行,选择“复制帖子数据”并将其粘贴到编辑器中:

尽管我只对当前更改的字段感兴趣,但该表单的每个字段都已提交:
form-search=form-search
countryCode=AT
ratingType={"type":"COUNTRY"}
averageRating
minAmount
maxAmount
averageAmount
company
location
staffResponsible
staffResponsible2
requestDate
reminderDate
acutalCurrency
compareCurrencies

//70 other empty form-ids....

includeForeignCurrencies=on

javax.faces.ViewState=1825148886808299106:-354534052529224349
javax.faces.source=includeForeignCurrencies
javax.faces.partial.event=click
javax.faces.partial.execute=includeForeignCurrencies
javax.faces.behavior.event=valueChange
javax.faces.partial.ajax=true

有没有办法减少发布的数据,例如:
includeForeignCurrencies=on

javax.faces.ViewState=1825148886808299106:-354534052529224349
javax.faces.source=includeForeignCurrencies
javax.faces.partial.event=click
javax.faces.partial.execute=includeForeignCurrencies
javax.faces.behavior.event=valueChange
javax.faces.partial.ajax=true

甚至只是
includeForeignCurrencies=on

提前致谢!

解决方法:

作为一种可能的解决方法,我想出了禁用所有未触发帖子的输入并在 ajax complete 中重新启用它们。 后数据大小现在是 200 B 而不是 2000 B。

因为我不确定这是否会导致任何其他问题,所以这是问题的更新,而不是答案。
<h:selectBooleanCheckbox id="includeForeignCurrencies" 
value="#{RatingManagerBean.formData.foreignCurrencies}"
action="#{RatingManagerBean.calculate}"
onclick="prepareAjaxPost(this)">

<f:ajax render="@none" execute="includeForeignCurrencies" onevent="ajaxPostComplete"/>

</h:selectBooleanCheckbox>

javascript/jQuery:
function prepareAjaxPost(source){   

//keep already disabled inputs disabled
$("#form-search :input:not(:disabled)").filter(function() {

return !this.id.match(/javax.faces.ViewState/); //all inputs ignoring jsf- viewstate ones

}).each(function(){
var input = $(this);
var others = input.not(source);
others.attr("disabled", true);
others.addClass("blocked"); //some style that has no visual effect for users

});
}

function ajaxPostComplete(data) {
switch (data.status) {
case "success": {

$("#form-search :input.blocked").each(function(){
$(this).attr("disabled",false).removeClass("blocked");
});

break;
}
}

最佳答案

首先阅读最后的“编辑 2:”

我知道您的问题是关于 JSF 2.3,但出于好奇,我想看看在普通 JSF 中是否有可能。好消息是,通过覆盖 jsf.js 函数,至少对于 Mojarra 2.2.8(手头没有任何其他环境)似乎是可能的。而且...如果你希望它是“有条件的”,所以不是在每个输入/按钮/...上,还要添加一个 passthrough 属性。

我检查/调试了 Mojarra jsf.js 文件的源代码,并注意到只有在创建完整的查询字符串后才能剥离/过滤掉字段,而不是 PrimeFaces 方式,它们阻止“预先”添加字段。可以完成此操作的函数是 getViewState 并且通过覆盖它,调用原始函数并在返回结果之前添加一些逻辑,这一切似乎都有效。缺点是它可能会过滤掉很多(见最后的评论)

要添加到代码中的 js(确保它加载的是 之后 jsf.js)

partialSubmit.js

var orgViewState = jsf.getViewState;
jsf.getViewState = function(form) {

var myViewState = orgViewState(form);

var eventSource = this.ajax.request.arguments[0];
// Read partialSubmit from the input (Mojarra puts attributes without camelcasing in the html, so pt:partialSubmit in the xhtml becomes partialsubmit in the html
var partialSubmit = eventSource.attributes['partialsubmit'];

//If not on the input, check the form
if (partialSubmit === undefined) {
partialSubmit = form.attributes['partialsubmit'];
}

if (partialSubmit != undefined && partialSubmit.value === "true") {
var params = myViewState.split("&");
var kvpairs = [];
var ids = [];
// Create list of id's based on the 'execute' list
var execute = this.ajax.request.arguments[2].execute;
// TODO check for other replacements (@parent, @form)?
execute = execute.replace('@this', eventSource.id);
execute = execute.replace('@none', "");

var ids = execute.split(" ");
for(j=0;j<ids.length;j++) {
var id = ids[j];
for (i=0;i<params.length; i++) {
var kv = params[i].split("=");
if (kv[0] === kv[1] || //to pass on the form id value keypair. Not sure this is needed
kv[0] === "javax.faces.ViewState" || // check if other 'relevant' fields need to be passed on (viewid, conversationid etc... How to detect these?
encodeURIComponent(id) === kv[0]) {
kvpairs.push("&"+params[i]);
}
}
}
return kvpairs.join("");
} else {
return myViewState;
}
}

下面提供了用法示例。在这个例子中,第一个和最后一个输入字段有 pt:partialSubmt="true"添加到输入中(添加到 ajax 标签时无法使其工作)。还有两个 ajax 启用 h:commandButtons ,一个有和一个没有部分提交。使用浏览器开发者工具可以看到使用时的差异

partialSubmitDemo.xhtml
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:pt="http://xmlns.jcp.org/jsf/passthrough">

<h:head />

<h:body>
<!-- adding pt:partialSubmit="true" to the form makes it work for every input/button in the form -->
<h:form>

<h:panelGrid columns="4" border="1" id="panel">
<h:outputText value="label" />
<h:outputText value="input" />
<h:outputText value="single ajax" />
<h:outputText value="all ajax" />

<h:outputLabel value="inp0" />
<h:inputText value="#{sessionScope['inp0']}" id="inp0" pt:partialsubmit="true">
<f:ajax render="aout0" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp0']}" id="aout0" />
<h:outputText value="#{sessionScope['inp0']}" id="out0" />

<h:outputLabel value="inp1" />
<h:inputText value="#{sessionScope['inp1']}" id="inp1">
<f:ajax render="aout1" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp1']}" id="aout1" />
<h:outputText value="#{sessionScope['inp1']}" id="out1" />

<h:outputLabel value="inp2" />
<h:inputText value="#{sessionScope['inp2']}" id="inp2">
<f:ajax render="aout2" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp2']}" id="aout2" />
<h:outputText value="#{sessionScope['inp2']}" id="out2" />

<h:outputLabel value="inp3" />
<h:inputText value="#{sessionScope['inp3']}" id="inp3">
<f:ajax render="aout3" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp3']}" id="aout3" />
<h:outputText value="#{sessionScope['inp3']}" id="out3" />

<h:outputLabel value="inp4" />
<h:inputText value="#{sessionScope['inp4']}" id="inp4">
<f:ajax render="aout4" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp4']}" id="aout4" />
<h:outputText value="#{sessionScope['inp4']}" id="out4" />

<h:outputLabel value="inp5" />
<h:inputText value="#{sessionScope['inp5']}" id="inp5">
<f:ajax render="aout5" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp5']}" id="aout5" />
<h:outputText value="#{sessionScope['inp5']}" id="out5" />

<h:outputLabel value="inp6" />
<h:inputText value="#{sessionScope['inp6']}" id="inp6">
<f:ajax render="aout6" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp6']}" id="aout6" />
<h:outputText value="#{sessionScope['inp6']}" id="out6" />

<h:outputLabel value="inp7" />
<h:inputText value="#{sessionScope['inp7']}" id="inp7">
<f:ajax render="aout7" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp7']}" id="aout7" />
<h:outputText value="#{sessionScope['inp7']}" id="out7" />

<h:outputLabel value="inp8" />
<h:inputText value="#{sessionScope['inp8']}" id="inp8">
<f:ajax render="aout8" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp8']}" id="aout8" />
<h:outputText value="#{sessionScope['inp8']}" id="out8" />

<h:outputLabel value="inp9" />
<h:inputText value="#{sessionScope['inp9']}" id="inp9"
pt:partialsubmit="true">
<f:ajax render="aout9" execute="@this" />
</h:inputText>
<h:outputText value="#{sessionScope['inp9']}" id="aout9" />
<h:outputText value="#{sessionScope['inp9']}" id="out9" />

</h:panelGrid>

<h:commandButton value="Update all ajax partial submit" pt:partialsubmit="true">
<f:ajax render="out0 out1 out2 out3 out4 out5 out6 out7 out8 out9" execute="@this" />
</h:commandButton>

<h:commandButton value="Update all ajax full submit">
<f:ajax render="out0 out1 out2 out3 out4 out5 out6 out7 out8 out9" execute="@this" />
</h:commandButton>
<h:commandButton value="Clear all" pt:partialsubmit="true">
<f:setPropertyActionListener value="" target="#{sessionScope['inp0']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp1']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp2']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp3']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp4']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp5']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp6']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp7']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp8']}" />
<f:setPropertyActionListener value="" target="#{sessionScope['inp9']}" />
<f:ajax render="panel" execute="@this" />
</h:commandButton>

</h:form>

<script src="partialSubmit.js" type="text/javascript" />

</h:body>
</html>

您可以在 javascript 代码中看到一些需要优化的注释,但这是一个很好的工作开始/开始。

编辑:
  • 添加了添加选项 pt:partialSubmit="true"<h:form>所以使用它形式广泛
  • 使用 OmniFaces 调查现有请求参数的传递 <o:form includeRequestParams="true">并且它们没有被剥离,因为它们不在表单字段的“viewState”键值对中。

  • 编辑 2:

    伟大的 OmniFaces 项目将在即将发布的 3.0 版本中包含此功能。 A commit由@BalusC 制作,已关闭 issue 394由于这个问题,我在那里创建了。 5天内使用
    <o:form> 

    将默认为部分提交

    关于jsf - <f :ajax render ="@none" execute ="@this"> and reducing submitted post data size in large form,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45366490/

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