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feat: remove file extension limit for model and policy files (#26)
* fix: processing line breaks in parameters * refactor: add content format validation for model and policy input * feat: update README.md
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,72 +1,77 @@ | ||
| package org.casbin; | ||
|
|
||
| import org.casbin.jcasbin.main.Enforcer; | ||
| import org.casbin.jcasbin.util.function.CustomFunction; | ||
|
|
||
| import java.io.BufferedWriter; | ||
| import java.io.File; | ||
| import java.io.FileWriter; | ||
| import java.io.IOException; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Paths; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
|
||
| public class NewEnforcer extends Enforcer { | ||
|
|
||
| private static final Pattern MODEL_SECTION_PATTERN = Pattern.compile( | ||
| "\\[request_definition\\].*?" + | ||
| "\\[policy_definition\\].*?" + | ||
| "\\[policy_effect\\].*?" + | ||
| "\\[matchers\\]", | ||
| Pattern.DOTALL | ||
| ); | ||
|
|
||
| private static final Pattern POLICY_LINE_PATTERN = Pattern.compile( | ||
| "^\\s*(p|g),.*", | ||
| Pattern.MULTILINE | ||
| ); | ||
|
|
||
| public NewEnforcer(String modelPath, String policyFile) { | ||
| super(parse(modelPath, ".conf"), parse(policyFile, ".csv")); | ||
| super(parse(modelPath, true), parse(policyFile, false)); | ||
| } | ||
|
|
||
| public static String parse(String string, String suffix) { | ||
| string = string.replace("|","\n"); | ||
| boolean isFile = string.endsWith(suffix); | ||
| if(suffix.equals(".conf")) { | ||
| if(isFile) { | ||
| try { | ||
| simpleCheck(new String(Files.readAllBytes(Paths.get(string)), StandardCharsets.UTF_8)); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } else { | ||
| simpleCheck(string); | ||
| public static String parse(String input, boolean isModel) { | ||
| if (input == null || input.trim().isEmpty()) { | ||
| throw new IllegalArgumentException("Input cannot be null or empty"); | ||
| } | ||
|
|
||
| // Check if input is an existing file | ||
| File file = new File(input); | ||
| if (file.exists() && file.isFile()) { | ||
| return input; | ||
| } | ||
|
|
||
| // If not a file, validate content format | ||
| if (isModel) { | ||
| if (!isValidModelContent(input)) { | ||
| throw new IllegalArgumentException("Invalid model format. Model must contain required sections: [request_definition], [policy_definition], [policy_effect], and [matchers]"); | ||
| } | ||
| } else { | ||
| if (!input.trim().isEmpty() && !isValidPolicyContent(input)) { | ||
| throw new IllegalArgumentException("Invalid policy format. Policy must contain lines starting with 'p,' or 'g,' or be empty"); | ||
| } | ||
| } | ||
| return isFile ? string : writeToTempFile(string, suffix); | ||
|
|
||
| // If content is valid, write to temp file | ||
| return writeToTempFile(input); | ||
| } | ||
|
|
||
| private static boolean isValidModelContent(String content) { | ||
| return MODEL_SECTION_PATTERN.matcher(content).find(); | ||
| } | ||
|
|
||
| public static String writeToTempFile(String str, String suffix) { | ||
| private static boolean isValidPolicyContent(String content) { | ||
| return content.trim().isEmpty() || POLICY_LINE_PATTERN.matcher(content).find(); | ||
| } | ||
|
|
||
| public static String writeToTempFile(String content) { | ||
| File tempFile = null; | ||
| try { | ||
| tempFile = File.createTempFile("default", suffix); | ||
| tempFile = File.createTempFile("casbin_temp_", ""); | ||
| tempFile.deleteOnExit(); | ||
| try (BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile))) { | ||
| writer.write(str); | ||
| writer.write(content); | ||
| } | ||
| } catch (IOException e) { | ||
| e.printStackTrace(); | ||
| throw new RuntimeException("Error creating temporary file", e); | ||
| } | ||
| return tempFile.getAbsolutePath(); | ||
| } | ||
|
|
||
| private static void simpleCheck(String fileString) { | ||
| fileString = fileString.replace(" ",""); | ||
| String[] requiredSubstrings = {"[request_definition]", "[policy_definition]", "[policy_effect]", "[matchers]", "r=", "p=", "e=", "m="}; | ||
| List<String> missingSubstrings = new ArrayList<>(); | ||
|
|
||
| for (String substring : requiredSubstrings) { | ||
| Pattern pattern = Pattern.compile(Pattern.quote(substring)); | ||
| Matcher matcher = pattern.matcher(fileString); | ||
| if (!matcher.find()) { | ||
| missingSubstrings.add(substring); | ||
| } | ||
| } | ||
|
|
||
| if(!missingSubstrings.isEmpty()) { | ||
| throw new RuntimeException("missing required sections: " + String.join(", ", missingSubstrings)); | ||
| } | ||
| } | ||
| } |