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fix: improve Jakarta Mail availability check and enhance inline image processing in EmlToPdf

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This commit is contained in:
Balázs Szücs 2025-06-19 00:40:13 +02:00
parent f916832c7b
commit 3a26dceb3c
1 changed files with 111 additions and 16 deletions
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127
common/src/main/java/stirling/software/common/util/EmlToPdf.java
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@ -95,23 +95,26 @@ public class EmlToPdf {
private static boolean isJakartaMailAvailable() {
if (jakartaMailAvailable == null) {
try {
// Check for core Jakarta Mail classes
Class.forName("jakarta.mail.internet.MimeMessage");
Class.forName("jakarta.mail.Session");
// Additional check to ensure we have the implementation, not just the API
Class.forName("com.sun.mail.smtp.SMTPTransport");
Class.forName("jakarta.mail.internet.MimeUtility");
Class.forName("jakarta.mail.internet.MimePart");
Class.forName("jakarta.mail.internet.MimeMultipart");
Class.forName("jakarta.mail.Multipart");
Class.forName("jakarta.mail.Part");
jakartaMailAvailable = true;
log.debug("Jakarta Mail libraries are available");
} catch (ClassNotFoundException e) {
// In Docker/production environments,
// if we detect we're in a containerized environment
// In Docker/production environments, if we detect we're in a containerized
// environment
String dockerEnv = System.getenv("DOCKER_ENABLE_SECURITY");
String disableFeatures = System.getenv("DISABLE_ADDITIONAL_FEATURES");
if (dockerEnv != null || disableFeatures != null) {
log.warn(
"Jakarta Mail not found but in Docker environment - forcing availability");
jakartaMailAvailable = false;
log.warn("Jakarta Mail not found but in Docker environment");
} else {
jakartaMailAvailable = false;
log.debug("Jakarta Mail libraries are not available, using basic parsing");
@ -302,7 +305,7 @@ public class EmlToPdf {
html.append("<h3>Attachments</h3>\n");
html.append(attachmentInfo);
// Add status message about attachment inclusion
// Add a status message about attachment inclusion
if (request != null && request.isIncludeAttachments()) {
html.append("<div class=\"attachment-inclusion-note\">\n");
html.append(
@ -349,8 +352,7 @@ public class EmlToPdf {
Constructor<?> mimeMessageConstructor =
mimeMessageClass.getConstructor(constructorArgs);
Object message =
mimeMessageConstructor.newInstance(
sessionClass.cast(session), new ByteArrayInputStream(emlBytes));
mimeMessageConstructor.newInstance(session, new ByteArrayInputStream(emlBytes));
return extractEmailContentAdvanced(message, request);
@ -658,6 +660,10 @@ public class EmlToPdf {
}
private static String processEmailHtmlBody(String htmlBody) {
return processEmailHtmlBody(htmlBody, null);
}
private static String processEmailHtmlBody(String htmlBody, EmailContent emailContent) {
if (htmlBody == null) return "";
String processed = htmlBody;
@ -666,9 +672,82 @@ public class EmlToPdf {
processed = processed.replaceAll("(?i)\\s*position\\s*:\\s*fixed[^;]*;?", "");
processed = processed.replaceAll("(?i)\\s*position\\s*:\\s*absolute[^;]*;?", "");
// Process inline images (cid: references) if we have email content with attachments
if (emailContent != null && !emailContent.getAttachments().isEmpty()) {
processed = processInlineImages(processed, emailContent);
}
return processed;
}
private static String processInlineImages(String htmlContent, EmailContent emailContent) {
if (htmlContent == null || emailContent == null) return htmlContent;
// Create a map of Content-ID to attachment data
Map<String, EmailAttachment> contentIdMap = new HashMap<>();
for (EmailAttachment attachment : emailContent.getAttachments()) {
if (attachment.isEmbedded()
&& attachment.getContentId() != null
&& attachment.getData() != null) {
contentIdMap.put(attachment.getContentId(), attachment);
}
}
if (contentIdMap.isEmpty()) return htmlContent;
// Pattern to match cid: references in img src attributes
Pattern cidPattern =
Pattern.compile(
"(?i)<img[^>]*\\ssrc\\s*=\\s*['\"]cid:([^'\"]+)['\"][^>]*>",
Pattern.CASE_INSENSITIVE);
Matcher matcher = cidPattern.matcher(htmlContent);
StringBuffer result = new StringBuffer();
while (matcher.find()) {
String contentId = matcher.group(1);
EmailAttachment attachment = contentIdMap.get(contentId);
if (attachment != null && attachment.getData() != null) {
// Convert to data URI
String mimeType = attachment.getContentType();
if (mimeType == null || mimeType.isEmpty()) {
// Try to determine MIME type from filename
String filename = attachment.getFilename();
if (filename != null) {
if (filename.toLowerCase().endsWith(".png")) {
mimeType = "image/png";
} else if (filename.toLowerCase().endsWith(".jpg")
|| filename.toLowerCase().endsWith(".jpeg")) {
mimeType = "image/jpeg";
} else if (filename.toLowerCase().endsWith(".gif")) {
mimeType = "image/gif";
} else if (filename.toLowerCase().endsWith(".bmp")) {
mimeType = "image/bmp";
} else {
mimeType = "image/png"; // fallback
}
} else {
mimeType = "image/png"; // fallback
}
}
String base64Data = Base64.getEncoder().encodeToString(attachment.getData());
String dataUri = "data:" + mimeType + ";base64," + base64Data;
// Replace the cid: reference with the data URI
String replacement =
matcher.group(0).replaceFirst("cid:" + Pattern.quote(contentId), dataUri);
matcher.appendReplacement(result, Matcher.quoteReplacement(replacement));
} else {
// Keep original if attachment not found
matcher.appendReplacement(result, Matcher.quoteReplacement(matcher.group(0)));
}
}
matcher.appendTail(result);
return result.toString();
}
private static void appendEnhancedStyles(StringBuilder html) {
int fontSize = StyleConstants.DEFAULT_FONT_SIZE;
String textColor = StyleConstants.DEFAULT_TEXT_COLOR;
@ -921,10 +1000,18 @@ public class EmlToPdf {
String[] contentIdHeaders = (String[]) getHeader.invoke(part, "Content-ID");
if (contentIdHeaders != null && contentIdHeaders.length > 0) {
attachment.setEmbedded(true);
// Store the Content-ID, removing angle brackets if present
String contentId = contentIdHeaders[0];
if (contentId.startsWith("<") && contentId.endsWith(">")) {
contentId = contentId.substring(1, contentId.length() - 1);
}
attachment.setContentId(contentId);
}
// Extract attachment data only if attachments should be included
if (request != null && request.isIncludeAttachments()) {
// Extract attachment data if attachments should be included OR if it's an
// embedded image (needed for inline display)
if ((request != null && request.isIncludeAttachments())
|| attachment.isEmbedded()) {
try {
Object attachmentContent = getContent.invoke(part);
byte[] attachmentData = null;
@ -945,15 +1032,23 @@ public class EmlToPdf {
if (attachmentData != null) {
// Check size limit (use default 10MB if request is null)
long maxSizeMB = request.getMaxAttachmentSizeMB();
long maxSizeMB =
request != null ? request.getMaxAttachmentSizeMB() : 10L;
long maxSizeBytes = maxSizeMB * 1024 * 1024;
if (attachmentData.length <= maxSizeBytes) {
attachment.setData(attachmentData);
attachment.setSizeBytes(attachmentData.length);
} else {
// Still show attachment info even if too large
attachment.setSizeBytes(attachmentData.length);
// For embedded images, always include data regardless of size
// to ensure inline display works
if (attachment.isEmbedded()) {
attachment.setData(attachmentData);
attachment.setSizeBytes(attachmentData.length);
} else {
// Still show attachment info even if too large
attachment.setSizeBytes(attachmentData.length);
}
}
}
} catch (Exception e) {
@ -1013,7 +1108,7 @@ public class EmlToPdf {
html.append("<div class=\"email-body\">\n");
if (content.getHtmlBody() != null && !content.getHtmlBody().trim().isEmpty()) {
html.append(processEmailHtmlBody(content.getHtmlBody()));
html.append(processEmailHtmlBody(content.getHtmlBody(), content));
} else if (content.getTextBody() != null && !content.getTextBody().trim().isEmpty()) {
html.append("<div class=\"text-body\">");
html.append(convertTextToHtml(content.getTextBody()));