为什么打开论坛后会自动下载一个叫composer.tpl的文件？
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HTML文件，内容如下
<div component="composer" class="composer<!-- IF resizable --> resizable<!-- ENDIF resizable --><!-- IF !isTopicOrMain --> reply<!-- ENDIF !isTopicOrMain -->"> <div class="composer-container"> <nav class="navbar navbar-fixed-top mobile-navbar hidden-md hidden-lg"> <div class="btn-group"> <button class="btn btn-sm btn-primary composer-discard" data-action="discard" tabindex="-1"><i class="fa fa-times"></i></button> <button class="btn btn-sm btn-primary composer-minimize" data-action="minimize" tabindex="-1"><i class="fa fa-minus"></i></button> </div> <!-- IF isTopic --> <div class="category-name-container"> <span class="category-name"></span> <i class="fa fa-sort"></i> </div> <!-- ENDIF isTopic --> <!-- IF !isTopicOrMain --> <h4 class="title">[[topic:composer.replying_to, "{title}"]]</h4> <!-- ENDIF !isTopicOrMain --> <div class="btn-group"> <button class="btn btn-sm btn-primary composer-submit" data-action="post" tabindex="-1"><i class="fa fa-chevron-right"></i></button> </div> </nav> <div class="row title-container"> <!-- IF showHandleInput --> <div data-component="composer/handle"> <input class="handle form-control" type="text" tabindex="1" placeholder="[[topic:composer.handle_placeholder]]" value="{handle}" /> </div> <!-- ENDIF showHandleInput --> <div data-component="composer/title"> <!-- IF isTopicOrMain --> <input class="title form-control" type="text" tabindex="1" placeholder="[[topic:composer.title_placeholder]]" value="{title}"/> <!-- ELSE --> <span class="title form-control">[[topic:composer.replying_to, "{title}"]]</span> <!-- ENDIF isTopicOrMain --> <ul class="dropdown-menu quick-search-results hidden"> {{{each posts}}} <li> <a href="{config.relative_path}/post/{posts.pid}"> {buildAvatar(posts.user, "sm", true)} <span class="quick-search-title">{posts.topic.title}</span> <br/> <p class="snippet"> {posts.snippet} </p> <small class="post-info pull-right"> <span class="fa-stack" style="{function.generateCategoryBackground, posts.category}"><i style="color:{posts.category.color};" class="fa {posts.category.icon} fa-stack-1x"></i></span> {posts.category.name} • <span class="timeago" title="{posts.timestampISO}"></span> </small> </a> </li> <!-- IF !@last --> <li role="separator" class="divider"></li> <!-- ENDIF --> {{{end}}} <!-- IF multiplePages --> <li class="text-center"> <a href="{url}"> [[search:see-more-results, {matchCount}]] </a> </li> <!-- ENDIF multiplePages --> </ul> </div> <!-- IF isTopic --> <div class="category-list-container hidden-sm hidden-xs"></div> <!-- ENDIF isTopic --> <div class="pull-right draft-icon hidden-xs hidden-sm"></div> <div class="btn-group pull-right action-bar hidden-sm hidden-xs"> <button class="btn btn-default composer-discard" data-action="discard" tabindex="-1"><i class="fa fa-times"></i> [[topic:composer.discard]]</button> <button class="btn btn-primary composer-submit" data-action="post" tabindex="6"><i class="fa fa-check"></i> [[topic:composer.submit]]</button> </div> </div> <div class="category-tag-row"> <div class="btn-toolbar formatting-bar"> <ul class="formatting-group"> <!-- BEGIN formatting --> <!-- IF formatting.spacer --> <li class="spacer"></li> <!-- ELSE --> <!-- IF !formatting.mobile --> <li tabindex="-1" data-format="{formatting.name}" title="{formatting.title}"><i class="{formatting.className}"></i></li> <!-- ENDIF !formatting.mobile --> <!-- ENDIF formatting.spacer --> <!-- END formatting --> <!--[if gte IE 9]><!--> <!-- IF privileges.upload:post:image --> <li class="img-upload-btn hide" data-format="picture" tabindex="-1" title="[[modules:composer.upload-picture]]"> <i class="fa fa-file-image-o"></i> </li> <!-- ENDIF privileges.upload:post:image --> <!-- IF privileges.upload:post:file --> <li class="file-upload-btn hide" data-format="upload" tabindex="-1" title="[[modules:composer.upload-file]]"> <span class="fa-stack"> <i class="fa fa-file-o fa-stack-1x"></i> <i class="fa fa-arrow-up fa-stack-1x"></i> </span> </li> <!-- ENDIF privileges.upload:post:file --> <!--<![endif]--> <!-- IF allowTopicsThumbnail --> <li tabindex="-1"> <i class="fa fa-th-large topic-thumb-btn topic-thumb-toggle-btn hide" title="[[topic:composer.thumb_title]]"></i> </li> <div class="topic-thumb-container center-block hide"> <form id="thumbForm" method="post" class="topic-thumb-form form-inline" enctype="multipart/form-data"> <img class="topic-thumb-preview"></img> <div class="form-group"> <label for="topic-thumb-url">[[topic:composer.thumb_url_label]]</label> <input type="text" id="topic-thumb-url" class="form-control" placeholder="[[topic:composer.thumb_url_placeholder]]" /> </div> <div class="form-group"> <label for="topic-thumb-file">[[topic:composer.thumb_file_label]]</label> <input type="file" id="topic-thumb-file" class="form-control" /> </div> <div class="form-group topic-thumb-ctrl"> <i class="fa fa-spinner fa-spin hide topic-thumb-spinner" title="[[topic:composer.uploading]]"></i> <i class="fa fa-times topic-thumb-btn hide topic-thumb-clear-btn" title="[[topic:composer.thumb_remove]]"></i> </div> </form> </div> <!-- ENDIF allowTopicsThumbnail --> <form id="fileForm" method="post" enctype="multipart/form-data"> <!--[if gte IE 9]><!--> <input type="file" id="files" name="files[]" multiple class="gte-ie9 hide"/> <!--<![endif]--> <!--[if lt IE 9]> <input type="file" id="files" name="files[]" class="lt-ie9 hide" value="Upload"/> <![endif]--> </form> </ul> </div> </div> <div class="row write-preview-container"> <div class="write-container"> <div class="help-text"> <span class="help hidden">[[modules:composer.compose]] <i class="fa fa-question-circle"></i></span> <span class="toggle-preview hide">[[modules:composer.show_preview]]</span> </div> <div class="pull-right draft-icon hidden-md hidden-lg"></div> <textarea class="write" tabindex="4"></textarea> </div> <div class="hidden-sm hidden-xs preview-container"> <div class="help-text"> <span class="toggle-preview">[[modules:composer.hide_preview]]</span> </div> <div class="preview well"></div> </div> </div> <!-- IF isTopicOrMain --> <div class="tag-row"> <div class="tags-container"> <div class="btn-group dropup <!-- IF !tagWhitelist.length -->hidden<!-- ENDIF !tagWhitelist.length -->" component="composer/tag/dropdown"> <button class="btn btn-default dropdown-toggle" data-toggle="dropdown" type="button"> <span class="visible-sm-inline visible-md-inline visible-lg-inline"><i class="fa fa-tags"></i></span> <span class="caret"></span> </button> <ul class="dropdown-menu"> <!-- BEGIN tagWhitelist --> <li data-tag="@value"><a href="#">@value</a></li> <!-- END tagWhitelist --> </ul> </div> <input class="tags" type="text" class="form-control" placeholder="[[tags:enter_tags_here, {minimumTagLength}, {maximumTagLength}]]" tabindex="5"/> </div> </div> <!-- ENDIF isTopicOrMain --> <!-- IF isTopic --> <ul class="category-selector visible-xs visible-sm"> </ul> <!-- ENDIF isTopic --> <div class="imagedrop"><div>[[topic:composer.drag_and_drop_images]]</div></div> <div class="resizer"><div class="trigger text-center"><i class="fa"></i></div></div> </div> </div>