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## - allow users to pre calculate template id from bytearray #3

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## - allow users to pre calculate template id from bytearray #3

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39 changes: 22 additions & 17 deletions src/main/java/io/carbone/CarboneServices.java
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,27 @@ public boolean checkPathIsAbsolute(String path) {
return p.isAbsolute();
}

@Override
public String generateTemplateId(byte[] fileBytes) {
MessageDigest digest;
try {
digest = MessageDigest.getInstance("SHA-256");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return null;
}

digest.update(fileBytes);
byte[] hashByte = digest.digest();
StringBuilder hexString = new StringBuilder();
for (byte b : hashByte) {
String hex = Integer.toHexString(0xff & b);
if (hex.length() == 1) hexString.append(0);
hexString.append(hex);
}
return hexString.toString();
}

public String generateTemplateId(String path) {
try {
File file = new File(path);
Expand All @@ -64,23 +85,7 @@ public String generateTemplateId(String path) {
return null;
}

MessageDigest digest;
try {
digest = MessageDigest.getInstance("SHA-256");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return null;
}

digest.update(fileBytes);
byte[] hashByte = digest.digest();
StringBuilder hexString = new StringBuilder();
for (byte b : hashByte) {
String hex = Integer.toHexString(0xff & b);
if (hex.length() == 1) hexString.append(0);
hexString.append(hex);
}
return hexString.toString();
return generateTemplateId(fileBytes);
} catch (Exception e) {
e.printStackTrace();
return null;
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7 changes: 7 additions & 0 deletions src/main/java/io/carbone/ICarboneServices.java
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Original file line number Diff line number Diff line change
Expand Up @@ -77,5 +77,12 @@ public interface ICarboneServices {
* @return give a precalculates templateId
*/
String generateTemplateId(String path);

/**
* precalculates the template id
* @param fileBytes byte content of the template file
* @return give a precalculates templateId
*/
String generateTemplateId(byte[] fileBytes);

}
12 changes: 12 additions & 0 deletions src/test/java/io/carbone/CarboneTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -483,4 +483,16 @@ public void Test_Carbon_Service_Fectory_With_No_Argument() throws CarboneExcepti
String status = carboneService.getStatus();
assertEquals(status.contains("\"success\":true,\"code\":200"), true);
}

@Test
public void Test_Generate_Template_Id_From_Byte_Array() throws CarboneException, IOException
{
String filename = "/src/test/java/io/carbone/template3.odt";
Path filePath = Paths.get(directory, filename);
byte[] fileBytes = Files.readAllBytes(filePath);

String templateId = carboneServices.generateTemplateId(fileBytes);

assertEquals(templateId, "fb9241ea2218ffd8f974110e539386384620244618c2efbf182b7bd47242987a");
}
}