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danfickle
Javascript is not executed in HTML before rendering PDF
Hi, I have created HTML template with placeholders for passing dynamic content and script renders ul-li. Im able to generate PDF but JS code is not getting executed before PDF rendering and causing blank ul-li.
`import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths;
import org.apache.commons.io.FileUtils; import org.jsoup.Jsoup; import org.jsoup.helper.W3CDom; import org.jsoup.nodes.Document;
import com.openhtmltopdf.pdfboxout.PdfRendererBuilder;
public class Html2PdfUsingOpenHtml {
private static final String C_CODEBASE_SPRING_PDF_TEMPORARY_HTML = "C:\\Codebase\\spring\\pdf\\temporary.html";
private static final String PDF_OUTPUT = "C:\\Codebase\\spring\\pdf\\final.pdf";
private Document createWellFormedHtml(final File inputHTML) throws Exception {
final Document document = Jsoup.parse(inputHTML, "UTF-8");
document.outputSettings().syntax(Document.OutputSettings.Syntax.xml);
return document;
}
private void generateHtmlToPdf() throws Exception {
// final String htmlTemplate = "<html><body>Hello, ${name}!</body></html>";
final String fileContent = readFileToString("C:\\Codebase\\spring\\pdf\\test.html");
String dynamicContent = fileContent.replace("${name}", "John Doe");
dynamicContent = dynamicContent.replace("${customer}",
"[{'name': 'John', 'age': '30', 'city': 'New York'},{'name': 'Rambo', 'age': '50', 'city': 'Arizona'}]");
final File tempHTML = new File(C_CODEBASE_SPRING_PDF_TEMPORARY_HTML);
FileUtils.writeStringToFile(tempHTML, dynamicContent);
final Document doc = createWellFormedHtml(tempHTML);
renderPDF(doc, PDF_OUTPUT);
}
private void renderPDF(final Document doc, final String outputPdf) throws Exception {
try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
final String baseUri = FileSystems.getDefault().getPath("src/main/resources/").toUri().toString();
final PdfRendererBuilder builder = new PdfRendererBuilder();
// builder.withUri(outputPdf);
builder.toStream(os);
builder.withW3cDocument(new W3CDom().fromJsoup(doc), baseUri);
builder.run();
os.writeTo(new FileOutputStream(outputPdf));
}
}
public static void main(final String[] args) {
try {
final Html2PdfUsingOpenHtml htmlToPdf = new Html2PdfUsingOpenHtml();
htmlToPdf.generateHtmlToPdf();
} catch (final Exception e) {
e.printStackTrace();
}
}
public static String readFileToString(final String filePath) throws IOException {
// Create a Path object from the file path
final Path path = Paths.get(filePath);
// Read the file content into a byte array
final byte[] bytes = Files.readAllBytes(path);
// Convert the byte array to a string using the default character encoding
return new String(bytes);
}
}`
Dependencies are :
<dependency> <groupId>com.openhtmltopdf</groupId> <artifactId>openhtmltopdf-core</artifactId> <version>1.0.6</version> </dependency> <dependency> <groupId>com.openhtmltopdf</groupId> <artifactId>openhtmltopdf-pdfbox</artifactId> <version>1.0.6</version> </dependency> <dependency> <groupId>com.openhtmltopdf</groupId> <artifactId>openhtmltopdf-svg-support</artifactId> <version>1.0.5</version> </dependency> <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.13.1</version> </dependency>
Is running JS even supported? Why don't you just replace your JS logic (which is not visible in the code you shared) with replacements/manipulations through your Java code? If you need to do complex things like loops, conditions etc. you could use a Java-based templating approach (via say Freemarker) to create your final HTML rather than rely on JS in the template.
