很多网站设计师在使用百度富文本编辑器UEDITOR集成秀米的时候遇到一个大坑,就是远程抓取图片本地化时，抓取不到背景图片，原因是秀米的背景用的不是img标签。万维景盛前端工程师为您分享解决方法：

ueditor.all.js文件里找到catchremoteimage插件控制器，修改如下几部分代码：

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UE.plugins['catchremoteimage'] = function () {
    var me = this,
        ajax = UE.ajax;
 
    /* 设置默认值 */
    if (me.options.catchRemoteImageEnable === false) return;
    me.setOpt({
        catchRemoteImageEnable: false
    });
 
    me.addListener("afterpaste", function () {
        me.fireEvent("catchRemoteImage");
    });
 
    me.addListener("catchRemoteImage", function () {
 
        var catcherLocalDomain = me.getOpt('catcherLocalDomain'),
            catcherActionUrl = me.getActionUrl(me.getOpt('catcherActionName')),
            catcherUrlPrefix = me.getOpt('catcherUrlPrefix'),
            catcherFieldName = me.getOpt('catcherFieldName');
 
        var remoteImages = [],
            imgs = domUtils.getElementsByTagName(me.document, "img"),
            backgroundimagestags = domUtils.getElementsByTagName(me.document, "section span div p "),//抓取背景图片所在的标签
            test = function (src, urls) {
            if (src.indexOf(location.host) != -1 || /(^\.)|(^\/)/.test(src)) {
                return true;
            }
            if (urls) {
                for (var j = 0, url; url = urls[j++];) {
                    if (src.indexOf(url) !== -1) {
                        return true;
                    }
                }
            }
            return false;
        };
 
        //img标签
        for (var i = 0, ci; ci = imgs[i++];) {
            if (ci.getAttribute("word_img")) {
                continue;
            }
            var src = ci.getAttribute("_src") || ci.src || "";
            if (/^(https?|ftp):/i.test(src) && !test(src, catcherLocalDomain)) {
                remoteImages.push(src);
            }
        }
 
        //背景图片所在标签
        var backgroundimages = [];
        //console.log("背景图片个数：" + backgroundimagestags.length);
        for (var i = 0, backci; backci = backgroundimagestags[i++];) {
 
            var bstyle = backci.style;
            var backgroundimgurltag = bstyle['background-image'] || bstyle['background'] || "";
            if (backgroundimgurltag != null && backgroundimgurltag != "") {
                var backsrc = backgroundimgurltag.split("(")[1].split(")")[0].replace(/\"/g, "")
                              || backgroundimgurltag.split("(")[1].split(")")[0].replace(/\"/g, "")
                              || "";
                //console.log("ci_src：" + backsrc);
                if (backsrc != null && backsrc != "") {
                    if (/^(https?|ftp):/i.test(backsrc) && !test(backsrc, catcherLocalDomain)) {
                        backgroundimages.push(backsrc);
                        remoteImages.push(backsrc);
                    }
                }
            }
            //console.log("remoteImages个数：" + remoteImages.length);
        }
 
        if (remoteImages.length) {
            me.fireEvent('catchremotestart');
            catchremoteimage(remoteImages, {
                //成功抓取
                success: function (r) {
                    try {
                        var info = r.state !== undefined ? r:eval("(" + r.responseText + ")");
                    } catch (e) {
                        return;
                    }
 
                    /* 获取源路径和新路径 */
                    var i, j, ci, cj, oldSrc, newSrc, list = info.list;
                   
                    
                    //img标签的替换
                    for (i = 0; ci = imgs[i++];) {
                        oldSrc = ci.getAttribute("_src") || ci.src || "";
                        for (j = 0; cj = list[j++];) {
                            if (oldSrc == cj.source && cj.state == "SUCCESS") {  //抓取失败时不做替换处理
                                newSrc = catcherUrlPrefix + cj.url;
                                domUtils.setAttributes(ci, {
                                    "src": newSrc,
                                    "_src": newSrc
                                });
                                break;
                            }
                        }
                    }
 
                    //背景图片地址的替换
                    var bodyHtml = me.document.body.innerHTML;
                    //console.log("上传之前html：" + bodyHtml);
                    for (var a = 0; a < backgroundimages.length; a++) {
                        oldSrc = backgroundimages[a] || "";
                        for (j = 0; cj = list[j++];) {
                            if (oldSrc == cj.source && cj.state == "SUCCESS") {  //抓取失败时不做替换处理
                                newSrc = catcherUrlPrefix + cj.url;
                                //console.log("上传之后oldSrc：" + oldSrc);
                                //console.log("上传之后newSrc：" + newSrc);
                                //console.log("上传之后html：" + me.document.body.innerHTML.replace(oldSrc, newSrc));
                                bodyHtml = bodyHtml.replace(oldSrc, newSrc);
                                break;
                            }
                        }
                    }
                    me.document.body.innerHTML = bodyHtml;
 
                    me.fireEvent('catchremotesuccess');
                    me.fireEvent('catchremotecomplete');
                },
                //回调失败，本次请求超时
                error: function () {
                    me.fireEvent("catchremoteerror");
                }
            });
        }
 
        function catchremoteimage(imgs, callbacks) {
            //console.log("1111L：" + imgs.length);
            var params = utils.serializeParam(me.queryCommandValue('serverparam')) || '',
                url = utils.formatUrl(catcherActionUrl + (catcherActionUrl.indexOf('?') == -1 ? '?':'&') + params),
                isJsonp = utils.isCrossDomainUrl(url),
                opt = {
                    'method': 'POST',
                    'dataType': isJsonp ? 'jsonp':'',
                    'timeout': 60000, //单位：毫秒，回调请求超时设置。目标用户如果网速不是很快的话此处建议设置一个较大的数值
                    'onsuccess': callbacks["success"],
                    'onerror': callbacks["error"]
                };
            opt[catcherFieldName] = imgs;
            ajax.request(url, opt);
        }
 
    });
};