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我有一个巨大的 jsf 页面,其底层 ViewScopeBean 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呈现任何内容。所以只是该表单中的一个示例字段:

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

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

</h:selectBooleanCheckbox>

在 ajax 发布之后,我检查了例如 firebug 中的开发人员工具,并发现提交的发布数据的大小高达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 完成中重新启用它们。发布数据大小现在是 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;
        }
}
4

1 回答 1

4

首先阅读末尾的“编辑 2:”

我知道您的问题是关于 JSF 2.3,但出于好奇,我想看看在纯 JSF 中是否有可能。好消息是,通过覆盖 jsf.js 函数,至少 Mojarra 2.2.8(手头没有任何其他环境)似乎是可能的。而且...如果您希望它是“有条件的”,那么不要在每个输入/按钮/...上添加一个直通属性。

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之后才能剥离/过滤字段,而不是使用 PrimeFaces 方式阻止“预先”添加字段。可以做到这一点的函数是 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太多(见最后的评论)

要添加到代码中的 js(确保它jsf.js 之后加载)

部分提交.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;
    }
}

下面提供了使用示例。在此示例中,第一个和最后一个输入字段已pt:partialSubmt="true"添加到输入中(添加到 ajax 标记时无法使其工作)。还有两种启用 ajax h:commandButtons,一种有,一种没有部分提交。使用浏览器开发人员工具,您可以看到使用它们时的差异

部分提交演示.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pt:partialSubmit="true"<h:form>So using it form wide的选项
  • 通过使用 OmniFaces 调查了现有请求参数的传递,<o:form includeRequestParams="true">并且由于它们不在表单字段的“viewState”键值对中,它们没有被剥离。

编辑2:

伟大的 OmniFaces 项目将在即将发布的 3.0 版本中提供此功能。@BalusC 已经提交了一个提交,关闭了我在此问题中创建的问题 3945 天内使用

<o:form> 

将默认为部分提交

于 2017-07-30T11:10:04.447 回答