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Make ZipHeaderInputStream read sub 5 byte entries correctly 

Closes gh-13525
This commit is contained in:
Andy Wilkinson 2018-06-19 16:44:08 +01:00
parent 99f993bc82
commit 6081db5c34
2 changed files with 67 additions and 7 deletions
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22
spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/JarWriter.java
View File

@ -357,15 +357,15 @@ public class JarWriter implements LoaderClassesWriter {
public int read(byte[] b, int off, int len) throws IOException {
int read = (this.headerStream != null ? this.headerStream.read(b, off, len)
: -1);
if (read > 0) {
if (read <= 0) {
return readRemainder(b, off, len);
}
this.position += read;
}
else {
read = 0;
}
if (read < len) {
read += super.read(b, off + read, len - read);
this.position += read;
int remainderRead = readRemainder(b, off + read, len - read);
if (remainderRead > 0) {
read += remainderRead;
}
}
if (this.position >= this.headerLength) {
this.headerStream = null;
@ -377,6 +377,14 @@ public class JarWriter implements LoaderClassesWriter {
return Arrays.equals(this.header, ZIP_HEADER);
}
private int readRemainder(byte[] b, int off, int len) throws IOException {
int read = super.read(b, off, len);
if (read > 0) {
this.position += read;
}
return read;
}
}
/**

52
spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/ZipHeaderPeekInputStreamTests.java
View File

@ -142,4 +142,56 @@ public class ZipHeaderPeekInputStreamTests {
}
}
@Test
public void readMoreThanEntireStreamWhenStreamLengthIsLessThanZipHeaderLength()
throws IOException {
ZipHeaderPeekInputStream in = null;
try {
in = new ZipHeaderPeekInputStream(
new ByteArrayInputStream(new byte[] { 10 }));
byte[] bytes = new byte[8];
assertThat(in.read(bytes)).isEqualTo(1);
assertThat(bytes).containsExactly(10, 0, 0, 0, 0, 0, 0, 0);
}
finally {
if (in != null) {
in.close();
}
}
}
@Test
public void readMoreThanEntireStreamWhenStreamLengthIsSameAsHeaderLength()
throws IOException {
ZipHeaderPeekInputStream in = null;
try {
in = new ZipHeaderPeekInputStream(
new ByteArrayInputStream(new byte[] { 1, 2, 3, 4 }));
byte[] bytes = new byte[8];
assertThat(in.read(bytes)).isEqualTo(4);
assertThat(bytes).containsExactly(1, 2, 3, 4, 0, 0, 0, 0);
}
finally {
if (in != null) {
in.close();
}
}
}
@Test
public void readMoreThanEntireStreamWhenStreamLengthIsZero() throws IOException {
ZipHeaderPeekInputStream in = null;
try {
in = new ZipHeaderPeekInputStream(new ByteArrayInputStream(new byte[0]));
byte[] bytes = new byte[8];
assertThat(in.read(bytes)).isEqualTo(-1);
assertThat(bytes).containsExactly(0, 0, 0, 0, 0, 0, 0, 0);
}
finally {
if (in != null) {
in.close();
}
}
}
}