将一个文档中的富文本和图像复制到另一个文档中的MIME

时间：2013-02-27 20:08:47

标签： ckeditor xpages mime

我有一个解决方案，用于将富文本内容从一个文档复制到另一个文档中的MIME。见http://per.lausten.dk/blog/2012/12/xpages-dynamically-updating-rich-text-content-in-a-ckeditor.html。我在应用程序中使用它作为用户在新文档中插入内容模板的方式，并使内容在CKEditor中即时显示。

问题在于内嵌图像不包含在复制中 - 只是对图像临时存储的引用。这意味着图像仅对当前会话中的当前用户可见。所以不是很有用。

如何添加图片？

2013年10月4日更新 我仍然在寻找解决方案。

3 个答案:

答案 0 :(得分：5)

我终于明白了。它更简单，甚至不涉及MIME。诀窍是修改工作HTML中的图像标签以包含base64编码图像，以便src标签可以使用这种格式（这里以gif为例）：

src="data:image/gif;base64,<base64 encoded image>"

我已经拥有从富文本字段中获取HTML所需的代码（请参阅我的问题中已经提到的my blog post）。所以我需要的是用正确的src格式替换图像src标签，包括base64编码图像。

以下代码获取HTML并浏览每个包含的图像并修改src标记：

String html = this.document.getValue(fieldName).toString();
if (null != html) {
    final List<FileRowData> fileRowDataList = document.getEmbeddedImagesList(fieldName);
    if (null != fileRowDataList) {
        final Matcher matcher = imgRegExp.matcher(html);
        while (matcher.find()) {
            String src = matcher.group();
            final String srcToken = "src=\"";
            final int x = src.indexOf(srcToken);
            final int y = src.indexOf("\"", x + srcToken.length());
            final String srcText = src.substring(x + srcToken.length(), y);
            for (FileRowData fileRowData : fileRowDataList) {
                final String srcImage = fileRowData.getHref();
                final String cidImage = ((AttachmentValueHolder) fileRowData).getCID();
                final String typeImage = ((AttachmentValueHolder) fileRowData).getType();
                final String persistentName = ((AttachmentValueHolder) fileRowData).getPersistentName();

                // Add base 64 image inline (src="data:image/gif;base64,<name>")
                if (srcText.endsWith(srcImage)) {
                    final String newSrc = src.replace(srcText, "data:" + typeImage + ";base64," + getBase64(persistentName));
                    html = html.replace(src, newSrc);
                }
            }
        }
    }
}

这是base64编码图像的getBase64（）方法：

private String getBase64(final String fileName) {
    String returnText = "";
    try {
        BASE64Encoder base64Enc = new BASE64Encoder();
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        base64Enc.encode(this.getEmbeddedImageStream(fileName), output);
        returnText = output.toString();
    } catch (NotesException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return returnText;
}

部分代码来自emailBean by Tony McGuckin。

答案 1 :(得分：2)

您可以通过DominoDocument.AttachmentValueHolder获取内联图像的句柄，请参阅http://public.dhe.ibm.com/software/dw/lotus/Domino-Designer/JavaDocs/XPagesExtAPI/8.5.2/com/ibm/xsp/model/domino/wrapped/DominoDocument.AttachmentValueHolder.html

我在笔记文档中发表了关于附件的博文，请参阅http://www.domino-weblog.nl/weblogs/Domino_Blog.nsf/dx/xpages-tip-get-easily-access-to-your-attachments-in-java.htm

答案 2 :(得分：1)

Gruesome hack（你需要整理身份验证和服务器名称）

SSJS（从视图中获取源代码）

var unid = curRow.getUniversalID();
var body = getComponent("body1");
var magic = new demo.HTMLMagic();
magic.doMagic(database, unid, body);

Java 

package demo;


import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;

import net.htmlparser.jericho.Attribute;
import net.htmlparser.jericho.Attributes;
import net.htmlparser.jericho.HTMLElementName;
import net.htmlparser.jericho.OutputDocument;
import net.htmlparser.jericho.Source;
import net.htmlparser.jericho.StartTag;
import lotus.domino.Database;
import lotus.domino.NotesException;

import com.ibm.misc.BASE64Encoder;
import com.ibm.xsp.component.xp.XspInputRichText;
import com.ibm.xsp.http.IMimeMultipart;
import com.ibm.xsp.model.domino.wrapped.DominoRichTextItem;

public class HTMLMagic {

private HttpClient          httpClient  = null;
private HttpHost            httpHost    = null;
//TODO: that needs to be resolved smarter
private static final String HOSTNAME    = "localhost";

public void doMagic(final Database database, final String unid, final XspInputRichText body) throws NotesException,
        ClientProtocolException, IOException {
    final String docURL = "http://" + HOSTNAME + "/__" + database.getReplicaID() + ".nsf/0/" + unid + "/Body?OpenField";
    final String fixedHTML = this.fixHTML(docURL);
    IMimeMultipart result = DominoRichTextItem.convertToMime("-- copied text--<br />" + fixedHTML);
    body.setValue(result);
}

private String fixHTML(final String rawHTMLstring) throws ClientProtocolException, IOException {
    HttpHost target = this.getHttpHost();
    HttpClient client = this.getHttpClient();
    HttpGet get = new HttpGet(rawHTMLstring);
    HttpResponse response = client.execute(target, get);
    InputStream data = response.getEntity().getContent();
    Source rawHTML = new Source(data);
    OutputDocument outputDocument = new OutputDocument(rawHTML);
    StringBuilder sb = new StringBuilder();
    String tagName = HTMLElementName.IMG;
    String attName = "src";
    List<StartTag> links = rawHTML.getAllStartTags(tagName);

    for (StartTag onelink : links) {
        String href = onelink.getAttributeValue(attName);
        if (href != null) {
            String replace = this.urltoData(href);
            if (replace != null) {
                sb.setLength(0);
                sb.append("<");
                sb.append(tagName);
                sb.append(" ");
                sb.append(attName);
                sb.append("=\"");
                sb.append(replace);
                sb.append("\"");
                Attributes atts = onelink.getAttributes();
                if (!atts.isEmpty()) {
                    for (int i = 0; i < atts.size(); i++) {
                        Attribute att = atts.get(i);
                        if (!att.getName().equals(attName)) {
                            sb.append(" ");
                            sb.append(att.getName());
                            sb.append("=\"");
                            sb.append(att.getValue());
                            sb.append("\" ");
                        }
                    }
                }
                sb.append(">");
                outputDocument.replace(onelink, sb.toString());
            }
        }
    }
    return outputDocument.toString();
}

private HttpClient getHttpClient() {

    if (this.httpClient == null) {

        // general setup
        SchemeRegistry supportedSchemes = new SchemeRegistry();

        // Register the "http" protocol scheme, it is required
        // by the default operator to look up socket factories.
        supportedSchemes.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));

        // prepare parameters
        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, "UTF-8");
        HttpProtocolParams.setUseExpectContinue(params, true);

        ClientConnectionManager connMgr = new ThreadSafeClientConnManager(params, supportedSchemes);
        this.httpClient = new DefaultHttpClient(connMgr, params);
    }
    return this.httpClient;
}

private HttpHost getHttpHost() {
    if (this.httpHost == null) {

        this.httpHost = new HttpHost(HOSTNAME, 80, "http");
    }
    return this.httpHost;
}

private String urltoData(final String href) throws ClientProtocolException, IOException {
    StringBuilder sb = new StringBuilder();
    sb.append("data:image/");
    sb.append(href.substring(href.lastIndexOf("FieldElemFormat=") + 1));
    sb.append(";base64,");

    // Here go the Image data
    HttpHost target = this.getHttpHost();
    HttpClient client = this.getHttpClient();
    HttpGet get = new HttpGet(href);
    HttpResponse response = client.execute(target, get);
    InputStream data = response.getEntity().getContent();

    BASE64Encoder encoder = new BASE64Encoder();
    OutputStream output = new ByteArrayOutputStream();
    encoder.encode(data, output);
    sb.append(output.toString());
    output.close();

    return sb.toString();
}

}

如果这适合你，会很好奇。 Notes客户端无法显示内联HTML图像

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