opendev/gerrit
Code Issues Proposed changes

Make MetadataParser more resistent

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In this commit:
- Make MetadataParser resistent to blanks
- Convert all CRLF to LF for unified processing
- For HTML processing split on <div> instead of <p> to adapt the parser
  to the new email format we send out to users.

Change-Id: I7e0316915765dab256771467e0e8345ca75802aa
This commit is contained in:
Patrick Hiesel
2017-02-07 10:33:09 +01:00
parent 49df12cb7d
commit 432229e0f7
3 changed files with 33 additions and 19 deletions
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29
gerrit-server/src/main/java/com/google/gerrit/server/mail/receive/MetadataParser.java
View File

@@ -23,9 +23,14 @@ import com.google.gerrit.server.mail.MailUtil;
import com.google.gerrit.server.mail.MetadataName;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.format.DateTimeParseException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/** Parse metadata from inbound email */
public class MetadataParser {
private static final Logger log = LoggerFactory.getLogger(MailProcessor.class.getName());
public static MailMetadata parse(MailMessage m) {
MailMetadata metadata = new MailMetadata();
// Find author
@@ -40,8 +45,12 @@ public class MetadataParser {
String ps = header.substring(toHeaderWithDelimiter(MetadataName.PATCH_SET).length());
metadata.patchSet = Ints.tryParse(ps);
} else if (header.startsWith(toHeaderWithDelimiter(MetadataName.TIMESTAMP))) {
String ts = header.substring(toHeaderWithDelimiter(MetadataName.TIMESTAMP).length());
String ts = header.substring(toHeaderWithDelimiter(MetadataName.TIMESTAMP).length()).trim();
try {
metadata.timestamp = Timestamp.from(MailUtil.rfcDateformatter.parse(ts, Instant::from));
} catch (DateTimeParseException e) {
log.error("Mail: Error while parsing timestamp from header of message " + m.id(), e);
}
} else if (header.startsWith(toHeaderWithDelimiter(MetadataName.MESSAGE_TYPE))) {
metadata.messageType =
header.substring(toHeaderWithDelimiter(MetadataName.MESSAGE_TYPE).length());
@@ -53,18 +62,18 @@ public class MetadataParser {
// If the required fields were not yet found, continue to parse the text
if (!Strings.isNullOrEmpty(m.textContent())) {
String[] lines = m.textContent().split("\n");
extractFooters(lines, metadata);
String[] lines = m.textContent().replace("\r\n", "\n").split("\n");
extractFooters(lines, metadata, m);
if (metadata.hasRequiredFields()) {
return metadata;
}
}
// If the required fields were not yet found, continue to parse the HTML
// HTML footer are contained inside a <p> tag
// HTML footer are contained inside a <div> tag
if (!Strings.isNullOrEmpty(m.htmlContent())) {
String[] lines = m.htmlContent().split("</p>");
extractFooters(lines, metadata);
String[] lines = m.htmlContent().replace("\r\n", "\n").split("</div>");
extractFooters(lines, metadata, m);
if (metadata.hasRequiredFields()) {
return metadata;
}
@@ -73,7 +82,7 @@ public class MetadataParser {
return metadata;
}
private static void extractFooters(String[] lines, MailMetadata metadata) {
private static void extractFooters(String[] lines, MailMetadata metadata, MailMessage m) {
for (String line : lines) {
if (metadata.changeId == null && line.contains(MetadataName.CHANGE_ID)) {
metadata.changeId = extractFooter(toFooterWithDelimiter(MetadataName.CHANGE_ID), line);
@@ -82,7 +91,11 @@ public class MetadataParser {
Ints.tryParse(extractFooter(toFooterWithDelimiter(MetadataName.PATCH_SET), line));
} else if (metadata.timestamp == null && line.contains(MetadataName.TIMESTAMP)) {
String ts = extractFooter(toFooterWithDelimiter(MetadataName.TIMESTAMP), line);
try {
metadata.timestamp = Timestamp.from(MailUtil.rfcDateformatter.parse(ts, Instant::from));
} catch (DateTimeParseException e) {
log.error("Mail: Error while parsing timestamp from footer of message " + m.id(), e);
}
} else if (metadata.messageType == null && line.contains(MetadataName.MESSAGE_TYPE)) {
metadata.messageType =
extractFooter(toFooterWithDelimiter(MetadataName.MESSAGE_TYPE), line);
@@ -91,6 +104,6 @@ public class MetadataParser {
}
private static String extractFooter(String key, String line) {
return line.substring(line.indexOf(key) + key.length(), line.length());
return line.substring(line.indexOf(key) + key.length(), line.length()).trim();
}
}

17
gerrit-server/src/test/java/com/google/gerrit/server/mail/receive/MetadataParserTest.java
View File

@@ -62,11 +62,11 @@ public class MetadataParserTest {
b.subject("");
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(toFooterWithDelimiter(MetadataName.CHANGE_ID) + "cid" + "\n");
stringBuilder.append(toFooterWithDelimiter(MetadataName.PATCH_SET) + "1" + "\n");
stringBuilder.append(toFooterWithDelimiter(MetadataName.CHANGE_ID) + "cid" + "\r\n");
stringBuilder.append("> " + toFooterWithDelimiter(MetadataName.PATCH_SET) + "1" + "\n");
stringBuilder.append(toFooterWithDelimiter(MetadataName.MESSAGE_TYPE) + "comment" + "\n");
stringBuilder.append(
toFooterWithDelimiter(MetadataName.TIMESTAMP) + "Tue, 25 Oct 2016 02:11:35 -0700" + "\n");
toFooterWithDelimiter(MetadataName.TIMESTAMP) + "Tue, 25 Oct 2016 02:11:35 -0700" + "\r\n");
b.textContent(stringBuilder.toString());
Address author = new Address("Diffy", "test@gerritcodereview.com");
@@ -91,15 +91,16 @@ public class MetadataParserTest {
b.subject("");
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("<p>" + toFooterWithDelimiter(MetadataName.CHANGE_ID) + "cid" + "</p>");
stringBuilder.append("<p>" + toFooterWithDelimiter(MetadataName.PATCH_SET) + "1" + "</p>");
stringBuilder.append(
"<p>" + toFooterWithDelimiter(MetadataName.MESSAGE_TYPE) + "comment" + "</p>");
"<div id\"someid\">" + toFooterWithDelimiter(MetadataName.CHANGE_ID) + "cid" + "</div>");
stringBuilder.append("<div>" + toFooterWithDelimiter(MetadataName.PATCH_SET) + "1" + "</div>");
stringBuilder.append(
"<p>"
"<div>" + toFooterWithDelimiter(MetadataName.MESSAGE_TYPE) + "comment" + "</div>");
stringBuilder.append(
"<div>"
+ toFooterWithDelimiter(MetadataName.TIMESTAMP)
+ "Tue, 25 Oct 2016 02:11:35 -0700"
+ "</p>");
+ "</div>");
b.htmlContent(stringBuilder.toString());
Address author = new Address("Diffy", "test@gerritcodereview.com");